{"type": "FeatureCollection", "features": [{"id": "10.1016/j.scitotenv.2020.143726", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:16:43Z", "type": "Journal Article", "created": "2020-11-24", "title": "A systematic comparison of commercially produced struvite: Quantities, qualities and soil-maize phosphorus availability", "description": "Production of struvite (MgNH4PO4\u00b76H2O) from waste streams is increasingly implemented to recover phosphorus (P), which is listed as a critical raw material in the European Union (EU). To facilitate EU-wide trade of P-containing secondary raw materials such as struvite, the EU issued a revised fertilizer regulation in 2019. A comprehensive overview of the supply of struvite and its quality is presently missing. This study aimed: i) to determine the current EU struvite production volumes, ii) to evaluate all legislated physicochemical characteristics and pathogen content of European struvite against newly set regulatory limits, and iii) to compare not-regulated struvite characteristics. It is estimated that in 2020, between 990 and 1250 ton P are recovered as struvite in the EU. Struvite from 24 European production plants, accounting for 30% of the 80 struvite installations worldwide was sampled. Three samples failed the physicochemical legal limits; one had a P content of <7% and three exceeded the organic carbon content of 3% dry weight (DW). Mineralogical analysis revealed that six samples had a struvite content of 80-90% DW, and 13 samples a content of >90% DW. All samples showed a heavy metal content below the legal limits. Microbiological analyses indicated that struvite may exceed certain legal limits. Differences in morphology and particle size distribution were observed for struvite sourced from digestate (rod shaped; transparent; 82 mass%\u202f<\u202f1\u202fmm), dewatering liquor (spherical; opaque; 65 mass% 1-2\u202fmm) and effluent from upflow anaerobic sludge blanket reactor processing potato wastewater (spherical; opaque; 51 mass%\u202f<\u202f1\u202fmm and 34 mass%\u202f>\u202f2\u202fmm). A uniform soil-plant P-availability pattern of 3.5-6.5\u202fmg P/L soil/d over a 28\u202fdays sampling period was observed. No differences for plant biomass yield were observed. In conclusion, the results highlight the suitability of most struvite to enter the EU fertilizer market.", "keywords": ["2. Zero hunger", "Struvite", "0211 other engineering and technologies", "Magnesium Compounds", "Phosphorus", "02 engineering and technology", "Zea mays", "01 natural sciences", "6. Clean water", "Phosphates", "12. Responsible consumption", "Chemistry", "Soil", "Bio-based fertilizers; Circular economy; Magnesium ammonium phosphate; Nutrient recovery; Phosphorus recovery; Struvite characterization; Magnesium Compounds; Phosphates; Soil; Struvite; Phosphorus; Zea mays", "Biology", "Engineering sciences. Technology", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://arpi.unipi.it/bitstream/11568/1138036/1/STOTEN_struvite.pdf"}, {"href": "https://doi.org/10.1016/j.scitotenv.2020.143726"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2020.143726", "name": "item", "description": "10.1016/j.scitotenv.2020.143726", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2020.143726"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-02-01T00:00:00Z"}}, {"id": "10.1016/j.biortech.2005.04.016", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:15:35Z", "type": "Journal Article", "created": "2005-06-25", "title": "Influences Of Vermicomposts On Field Strawberries: Part 2. Effects On Soil Microbiological And Chemical Properties", "description": "The effects of applications of food waste and paper waste vermicomposts on some soil chemical and biological properties were evaluated in field plots planted with strawberries. Six-week old strawberries (Fragaria ananasa, var. Chandler) were transplanted into 4.5 m(2) raised beds under a plastic tunnel structure measuring 9.14 x 14.6 x 3.6 m. Vermicompost were applied at rates of 5 or 10 t ha(-1) supplemented with inorganic fertilizers to balance fertilizer recommendations for strawberries of 85-155-125 kg NPK ha(-1). Effects of vermicomposts on strawberry growth and yields have been reported previously [Arancon, N.Q., Edwards C.A., Bierman P., Welch, C., Metzger, J.D., 2004. The influence of vermicompost applications to strawberries: Part 1. Effects on growth and yield. Bioresource Technology 93:145-153]. Total extractable N, NH(4)-N, NO(3)-N and orthophosphates did not differ significantly between treatments, except on the last sampling date (harvest date) in which significantly greater amounts of NH(4)-N, NO(3)-N and orthophosphates (P Crops have different strategies to acquire poorly-available soil phosphorus (P) which are dependent on their architectural, morphological, and physiological root traits, but their capacity to enhance P acquisition varies with the type of fertilizer applied. The objective of this study was to examine how P-acquisition strategies of three main crops are affected by the application of sewage sludges, compared with a mineral P fertilizer. We carried out a 3-months greenhouse pot experiment and compared the response of P-acquisition traits among wheat, barley and canola in a soil amended with three sludges or a mineral P fertilizer. Results showed that the P-acquisition strategy differed among crops. Compared with canola, wheat and barley had a higher specific root length and a greater root carboxylate release and they acquired as much P from sludge as from mineral P. By contrast, canola shoot P content was greater with sludge than with mineral P. This was attributed to a higher root-released acid phosphatase activity which promoted the mineralization of sludge-derived P-organic. This study showed that contrasted P-acquisition strategies of crops allows increased use of renewable P resources by optimizing combinations of crop and the type of P fertilizer applied within the cropping system.

", "keywords": ["Calcium Phosphates", "Crops", " Agricultural", "0106 biological sciences", "phosphatase activity", "N\u00e4hrstoffaufnahme", "carboxylate", "Phytic Acid", "Acid Phosphatase", "[SDV.SA.AGRO]Life Sciences [q-bio]/Agricultural sciences/Agronomy", "Carboxylic Acids", "organic P fertilizer", " mineral P fertilizer", " carboxylate", " phosphatase activity", "Plant Roots", "01 natural sciences", "630", "Article", "12. Responsible consumption", "Soil", "Boden", "Species Specificity", "ddc:630", "Humans", "Fertilizers", "Triticum", "Plant Proteins", "2. Zero hunger", "Plant Stems", "Sewage", "Brassica rapa", "Agriculture", "Biological Transport", "Hordeum", "Phosphorus", "Phosphor", "04 agricultural and veterinary sciences", "15. Life on land", "6. Clean water", "0401 agriculture", " forestry", " and fisheries", "G\u00e4rrest", "mineral P fertilizer", "organic P fertilizer"]}, "links": [{"href": "https://www.nature.com/articles/s41598-019-51204-x.pdf"}, {"href": "https://doi.org/10.1038/s41598-019-51204-x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/s41598-019-51204-x", "name": "item", "description": "10.1038/s41598-019-51204-x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41598-019-51204-x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-10-16T00:00:00Z"}}, {"id": "10.1038/srep14378", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:17:44Z", "type": "Journal Article", "created": "2015-09-23", "title": "Effects Of Nitrogen And Phosphorus Additions On Soil Microbial Biomass And Community Structure In Two Reforested Tropical Forests", "description": "Abstract

Elevated nitrogen (N) deposition may aggravate phosphorus (P) deficiency in forests in the warm humid regions of China. To our knowledge, the interactive effects of long-term N deposition and P availability on soil microorganisms in tropical replanted forests remain unclear. We conducted an N and P manipulation experiment with four treatments: control, N addition (15\uffe2\uff80\uff89g N m\uffe2\uff88\uff922\uffc2\uffb7yr\uffe2\uff88\uff921), P addition (15\uffe2\uff80\uff89g P m\uffe2\uff88\uff922\uffc2\uffb7yr\uffe2\uff88\uff921) and N and P addition (15\uffe2\uff80\uff89+\uffe2\uff80\uff8915\uffe2\uff80\uff89g N and P m\uffe2\uff88\uff922\uffc2\uffb7yr\uffe2\uff88\uff921, respectively) in disturbed (planted pine forest with recent harvests of understory vegetation and litter) and rehabilitated (planted with pine, but mixed with broadleaf returning by natural succession) forests in southern China. Nitrogen addition did not significantly affect soil microbial biomass, but significantly decreased the abundance of gram-negative bacteria PLFAs in both forest types. Microbial biomass increased significantly after P addition in the disturbed forest but not in the rehabilitated forest. No interactions between N and P additions on soil microorganisms were observed in either forest type. Our results suggest that microbial growth in replanted forests of southern China may be limited by P rather than by N and this P limitation may be greater in disturbed forests.

", "keywords": ["China", "Principal Component Analysis", "Nitrates", "Rainforest", "Nitrogen", "Microbiota", "Fatty Acids", "Forestry", "Phosphorus", "04 agricultural and veterinary sciences", "15. Life on land", "Gram-Positive Bacteria", "Article", "Carbon Cycle", "Phosphates", "Multidisciplinary Sciences", "Soil", "Gram-Negative Bacteria", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Fertilizers", "Ecosystem", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1038/srep14378"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep14378", "name": "item", "description": "10.1038/srep14378", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep14378"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-09-23T00:00:00Z"}}, {"id": "10.1093/plcell/koac215", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:18:19Z", "type": "Journal Article", "created": "2022-07-22", "title": "Energy status-promoted growth and development of Arabidopsis require copper deficiency response transcriptional regulator SPL7", "description": "Abstract

Copper (Cu) is a cofactor of around 300 Arabidopsis proteins, including photosynthetic and mitochondrial electron transfer chain enzymes critical for adenosine triphosphate (ATP) production and carbon fixation. Plant acclimation to Cu deficiency requires the transcription factor SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE7 (SPL7). We report that in the wild type (WT) and in the spl7-1 mutant, respiratory electron flux via Cu-dependent cytochrome c oxidase is unaffected under both normal and low-Cu cultivation conditions. Supplementing Cu-deficient medium with exogenous sugar stimulated growth of the WT, but not of spl7 mutants. Instead, these mutants accumulated carbohydrates, including the signaling sugar trehalose 6-phosphate, as well as ATP and NADH, even under normal Cu supply and without sugar supplementation. Delayed spl7-1 development was in agreement with its attenuated sugar responsiveness. Functional TARGET OF RAPAMYCIN and SNF1-RELATED KINASE1 signaling in spl7-1 argued against fundamental defects in these energy-signaling hubs. Sequencing of chromatin immunoprecipitates combined with transcriptome profiling identified direct targets of SPL7-mediated positive regulation, including Fe SUPEROXIDE DISMUTASE1 (FSD1), COPPER-DEFICIENCY-INDUCED TRANSCRIPTION FACTOR1 (CITF1), and the uncharacterized bHLH23 (CITF2), as well as an enriched upstream GTACTRC motif. In summary, transducing energy availability into growth and reproductive development requires the function of SPL7. Our results could help increase crop yields, especially on Cu-deficient soils.Research is needed on novel consolidants to restore weathered marble, because the available products exhibit limitations. To test new consolidants, samples with features similar to naturally weathered marble (i.e., near\uffe2\uff80\uff90surface damage) are recommended. We developed a novel method that produces decayed samples with a gradient in properties that can be tuned to any desired level, in terms of depth from the surface and decrease in dynamic elastic modulus. The idea is to produce near\uffe2\uff80\uff90surface damage by putting a marble sample in contact with a plate at a certain temperature for a certain time, calculated by a mathematical model. The model was used to predict the heating conditions to produce a certain decrease in dynamic elastic modulus in the first 1\uffc2\uffa0cm from the surface, comparable to naturally weathered marble. Good confirmation of the model predictions was found experimentally. The suitability of using thermally \uffe2\uff80\uff9cweathered\uffe2\uff80\uff9d samples for testing consolidants was demonstrated in the case of a hydroxyapatite\uffe2\uff80\uff90based treatment. The mathematical model can be tailored to other lithotypes or ceramics, using the relevant property data.

", "keywords": ["2. Zero hunger", "0211 other engineering and technologies", "Aging Calcium phosphate Consolidation Cracks/cracking Hydroxyapatite", "02 engineering and technology", "ING-IND/22 Scienza e tecnologia dei materiali", "0210 nano-technology", "Aging; Calcium phosphate; Consolidation; Cracks/cracking; Hydroxyapatite; Calcium phosphates"]}, "links": [{"href": "https://cris.unibo.it/bitstream/11585/643029/4/JACERS_Copertina.pdf"}, {"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/jace.15522"}, {"href": "https://doi.org/10.1111/jace.15522"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20American%20Ceramic%20Society", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/jace.15522", "name": "item", "description": "10.1111/jace.15522", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/jace.15522"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-10T00:00:00Z"}}, {"id": "10.1111/nph.14083", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:19:01Z", "type": "Journal Article", "created": "2016-07-11", "title": "Increased Phosphate Uptake But Not Resorption Alleviates Phosphorus Deficiency Induced By Nitrogen Deposition In Temperate Larix Principis-Rupprechtii Plantations", "description": "Summary

The imbalance between nitrogen (N) and phosphorus (P) deposition may shift temperate ecosystems from N\uffe2\uff80\uff90 to P\uffe2\uff80\uff90limitation. However, it is unclear how the imbalanced N\uffc2\uffa0:\uffc2\uffa0P input affects the strategies of plants to acquire P and, therefore, the growth of plants and the competition among species.

We conducted a 4\uffe2\uff80\uff90yr N\uffe2\uff80\uff90addition experiment in young and mature larch (Larix principis\uffe2\uff80\uff90rupprechtii) stands. Plant growth and P acquisition strategies were assessed for larch and understorey vegetation.

N addition stimulated the aboveground productivity of understorey vegetation in the young stand and larch in the mature stand, with other species unaffected. The competitive advantages of understorey vegetation in the young stand and larch in the mature stand were associated with their high stoichiometric homoeostasis. To maintain the N\uffc2\uffa0:\uffc2\uffa0P homoeostasis of these species, an increase in phosphatase activity but not P resorption efficiency increased the supply of P. Additionally, N addition accelerated P mineralization by decreasing the fungal\uffe2\uff80\uff90to\uffe2\uff80\uff90bacterial ratios and improved uptake of soil P by increasing the arbuscular mycorrhizas\uffe2\uff80\uff90to\uffe2\uff80\uff90ectomycorrhizas ratios.

Our results suggest that plants with high stoichiometric homoeostasis could better cope with N deposition\uffe2\uff80\uff90induced P\uffe2\uff80\uff90deficiency. Although P resorption efficiency showed little plasticity in response, plants activated a variety of P\uffe2\uff80\uff90acquisition pathways to alleviate the P\uffe2\uff80\uff90deficiency caused by N deposition.

", "keywords": ["2. Zero hunger", "Analysis of Variance", "Bacteria", "Nitrogen", "Acid Phosphatase", "Fatty Acids", "Fungi", "Larix", "Phosphorus", "04 agricultural and veterinary sciences", "15. Life on land", "Plant Roots", "Phosphates", "Plant Leaves", "Species Specificity", "Mycorrhizae", "Homeostasis", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Phospholipids"]}, "links": [{"href": "https://doi.org/10.1111/nph.14083"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/New%20Phytologist", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/nph.14083", "name": "item", "description": "10.1111/nph.14083", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/nph.14083"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-07-11T00:00:00Z"}}, {"id": "10.1111/nph.16554", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:19:02Z", "type": "Journal Article", "created": "2020-03-21", "title": "Linking root structure to functionality: the impact of root system architecture on citrate\u2010enhanced phosphate uptake", "description": "Summary

Root citrate exudation is thought to be important for phosphate solubilization. Previous research has concluded that cluster\uffe2\uff80\uff90like roots benefit most from this exudation in terms of increased phosphate uptake, suggesting that root structure plays an important role in citrate\uffe2\uff80\uff90enhanced uptake (additional phosphate uptake due to citrate exudation).

Time\uffe2\uff80\uff90resolved computed tomography images of wheat root systems were used as the geometry for 3D citrate\uffe2\uff80\uff90phosphate solubilization models. Citrate\uffe2\uff80\uff90enhanced uptake was correlated with morphological measures of the root systems to determine which had the most benefit.

A large variation of citrate\uffe2\uff80\uff90enhanced uptake over 11 root structures was observed. Root surface area dominated absolute phosphate uptake, but did not explain citrate\uffe2\uff80\uff90enhanced uptake. Number of exuding root tips correlated well with citrate\uffe2\uff80\uff90enhanced uptake. Root tips in close proximity could collectively exude high amounts of citrate, resulting in a delayed spike in citrate\uffe2\uff80\uff90enhanced uptake.

Root system architecture plays an important role in citrate\uffe2\uff80\uff90enhanced uptake. Singular morphological measurements of the root systems cannot entirely explain variations in citrate\uffe2\uff80\uff90enhanced uptake. Root systems with many tips would benefit greatly from citrate exudation. Quantifying citrate\uffe2\uff80\uff90enhanced uptake experimentally is difficult as variations in root surface area would overwhelm citrate benefits.

To prevent soiling of marble exposed outdoors, the use of TiO2 nano-particles has been proposed in the literature by two main routes, both raising durability issues: (i) direct application to marble surface, with the risk of particle leaching by rainfall; (ii) particle incorporation into inorganic or organic coatings, with the risk of organic coating degradation catalyzed by TiO2 photoactivity. Here, we investigated the combination of nano-TiO2 and hydroxyapatite (HAP), previously developed for marble protection against dissolution in rain and mechanical consolidation. HAP-TiO2 combination was investigated by two routes: (i) sequential application of HAP followed by nano-TiO2 (\uffe2\uff80\uff9cH+T\uffe2\uff80\uff9d); (ii) simultaneous application by introducing nano-TiO2 into the phosphate solution used to form HAP (\uffe2\uff80\uff9cHT\uffe2\uff80\uff9d). The self-cleaning ability was evaluated before and after prolonged exposure to simulated rain. \uffe2\uff80\uff9cH+T\uffe2\uff80\uff9d and \uffe2\uff80\uff9cHT\uffe2\uff80\uff9d coatings exhibited much better resistance to nano-TiO2 leaching by rain, compared to TiO2 alone. In \uffe2\uff80\uff9cH+T\uffe2\uff80\uff9d samples, TiO2 nano-particles adhere better to HAP (having flower-like morphology and high specific surface area) than to marble. In \uffe2\uff80\uff9cHT\uffe2\uff80\uff9d samples, thanks to chemical bonds between nano-TiO2 and HAP, the particles are firmly incorporated in the HAP coating, which protects them from leaching by rain, without diminishing their photoactivity and without being degraded by them.

", "keywords": ["Anatase; Calcium phosphates; Consolidation; Cultural heritage; Leaching; Marble; Photocatalytic activity; Protection; Rain; Soiling; Materials Science (all)", "0211 other engineering and technologies", "soiling; photocatalytic activity; anatase; marble; calcium phosphates; cultural heritage; protection; rain; leaching; consolidation", "02 engineering and technology", "ING-IND/22 Scienza e tecnologia dei materiali", "Soiling; Photocatalytic activity; Anatase; Marble; Calcium phosphates; Cultural Heritage; Protection; Rain; Leaching; Consolidation", "0210 nano-technology", "Article", "6. Clean water"]}, "links": [{"href": "http://www.mdpi.com/1996-1944/11/2/177/pdf"}, {"href": "https://cris.unibo.it/bitstream/11585/628257/1/Sassoni%20et%20al%20%282018%29%20HAP%2bTiO2.pdf"}, {"href": "https://doi.org/10.3390/ma11020177"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Materials", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/ma11020177", "name": "item", "description": "10.3390/ma11020177", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/ma11020177"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-01-23T00:00:00Z"}}, {"id": "10.3390/ma11040557", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:20:56Z", "type": "Journal Article", "created": "2018-04-04", "title": "Hydroxyapatite and Other Calcium Phosphates for the Conservation of Cultural Heritage: A Review", "description": "

The present paper reviews the methods and the performance of in situ formation of calcium phosphates (CaP) for the conservation of materials belonging to cultural heritage. The core idea is to form CaP (ideally hydroxyapatite, HAP, the most stable CaP at pH > 4) by reaction between the substrate and an aqueous solution of a phosphate salt. Initially proposed for the conservation of marble and limestone, the treatment has been explored for a variety of different substrates, including sandstones, sulphated stones, gypsum stuccoes, concrete, wall paintings, archaeological bones and paper. First, the studies aimed at identifying the best treatment conditions (e.g., nature and concentration of the phosphate precursor, solution pH, treatment duration, ionic and organic additions to the phosphate solution, mineralogical composition of the new CaP phases) are summarized. Then, the treatment performance on marble and limestone is reviewed, in terms of protective and consolidating effectiveness, compatibility (aesthetic, microstructural and physical) and durability. Some pilot applications in real case studies are also reported. Recent research aimed at extending the phosphate treatment to other substrates is then illustrated. Finally, the strengths of the phosphate treatment are summarized, in comparison with alternative products, and some aspects needing future research are outlined.

", "keywords": ["Ammonium oxalate; Ammonium phosphate; Calcium phosphates; Consolidation; Durability; Hydroxyapatite; Limestone; Marble; Octacalcium phosphate; Protection; Materials Science", "2. Zero hunger", "11. Sustainability", "Review", "02 engineering and technology", "ING-IND/22 Scienza e tecnologia dei materiali", "0210 nano-technology", "6. Clean water", "marble limestone consolidation protection durability calcium phosphates hydroxyapatite octacalcium phosphate ammonium phosphate ammonium oxalate", "12. Responsible consumption"], "contacts": [{"organization": "Sassoni, Enrico", "roles": ["creator"]}]}, "links": [{"href": "https://cris.unibo.it/bitstream/11585/643011/1/Sassoni%20%282018%29%20Review%20HAP%20for%20CH.pdf"}, {"href": "http://www.mdpi.com/1996-1944/11/4/557/pdf"}, {"href": "https://doi.org/10.3390/ma11040557"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Materials", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/ma11040557", "name": "item", "description": "10.3390/ma11040557", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/ma11040557"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-04T00:00:00Z"}}, {"id": "10.3929/ethz-b-000663192", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:21:14Z", "type": "Journal Article", "title": "Vivianite formation and transformation processes in intertidal sediments and the influence of isomorphic substitution", "description": "unspecifiedPhosphor (P) ist ein wesentlicher N\u00e4hrstoff f\u00fcr die Prim\u00e4rproduktion in aqautischen \u00d6kosystemen, aber \u00fcberm\u00e4\u00dfiger P Eintrag kann zur Eutrophierung dieser \u00d6kosysteme f\u00fchren. Wie P in Sedimenten gebunden ist, wirkt sich auf dessen Bioverf\u00fcgbarkeit aus. Unter reduzierenden, sulfid-freien Bedingungen kann das eisenhaltige Phosphatmineral Vivianit eine wesentliche Rolle bei der P-Bindung in K\u00fcstensedimenten spielen und somit die Wasserqualit\u00e4t positiv beeinflussen. Trotz der Bedeutung von Vivianit f\u00fcr die Regulierung der P-Verf\u00fcgbarkeit in K\u00fcstensedimenten sind die in-situ Bildung, Zusammensetzung und Stabilit\u00e4t von Vivianit nur unzureichend untersucht. In dieser Doktorarbeit wurden Feldexperimente mit einer Laborstudie kombiniert, um die Bildungs- und Umwandlungsprozesse von Vivianit in gezeitenbeeinflussten Sedimenten und den Einfluss der isomorphen Substitution auf diese Prozesse aufzudecken. Diese Erkenntnisse bieten wertvolle Einblicke in die Prozesse des P-Kreislaufs in K\u00fcstensedimenten und sind bedeutend f\u00fcr die Entwicklung industrieller Anwendungen, die darauf abzielen, den anthropogenen P-Kreislauf zu schlie\u00dfen. Im ersten Teil der Arbeit wurde eine Methode entwickelt, bei der isotopisch 57Fe-markiertes Ferrihydrit mit dem Sediment vermischt wurde, um die Vivianitbildung in-situ in gezeitenbeeinflussten Sedimenten zu verfolgen. Mit dieser Methode konnte gezeigt werden, dass sich Vivianit innerhalb von sieben Wochen in gezeitenbeeinflussten Sedimenten mit g\u00fcnstigen geochemischen Bedingungen bilden kann. Die Adsorption von Phosphat an Ferrihydrit war ein wesentlicher Vorl\u00e4ufer f\u00fcr die Bildung von Vivianit. Die reduktive Aufl\u00f6sung des Ferrihydrits bildete wahrscheinlich lokale Bedingen, welche n\u00f6tig waren, um die Vivianitbildung auszul\u00f6sen. W\u00e4hrend das gebildete Vivianit nur ein kleiner Teil des Eisen (Fe)-Pools war (bis zu 15%), machte es bis zu 72% des P-Pools aus basierend auf st\u00f6chiometrischen Berechnungen. Diese Ergebnisse zeigen, dass Vivianit eine entscheidende Rolle bei der Regulierung der P-Retention in K\u00fcstensedimenten spielen kann. In der Umwelt enth\u00e4lt Vivianit h\u00e4ufig andere zweiwertige Kationen, wie Mangan (Mn) und Magnesium (Mg), die in der Kristallstruktur Fe ersetzen. Im zweiten Experiment wurde untersucht, ob Mn oder Mg bei unterschiedlichen Salzgehalten bevorzugt eingebaut wird und wie die isomorphe Substitution die Kristallstruktur und Morphologie ver\u00e4ndert. Die Synthese von neunzehn Vivianiten mit unterschiedlichen Mn- und/oder Mg-Konzentrationen bei verschiedenen Salzgehalten ergab, dass bei niedriger Ionenst\u00e4rke sowohl Mn als auch Mg Fe in der Kristallstruktur gleichwertig ersetzen k\u00f6nnen, wobei Mn bei h\u00f6herer Ionenst\u00e4rke bevorzugt wurde. Vivianit weist zwei unterschiedliche Fe-Atompositionen auf. Die Substitution von Fe durch Mn und/oder Mg fand vorzugsweise an der Atomposition statt, welche Elektronentransfer ausf\u00fchren kann, wodurch Vivianit gegen Oxidation stabilisiert wird. Somit kann sich die isomorphe Substitution wahrscheinlich direkt auf das Oxidationsverhalten von Vivianit auswirken. Au\u00dferdem f\u00fchrte die isomorphe Substitution zu kleineren, raueren Kristallen mit geringerer Kristallinit\u00e4t. Diese beobachteten Ver\u00e4nderungen k\u00f6nnten sich auf die Reaktivit\u00e4t von Vivianit in der Umwelt auswirken, weshalb die isomorphe Substitution bei der Untersuchung der Reaktivit\u00e4t von Vivianit ber\u00fccksichtigt werden sollte. Umweltver\u00e4nderungen, einschlie\u00dflich des Anstiegs des Meeresspiegels, k\u00f6nnten die Bildung von Sulfid in derzeit nicht sulfidischen Sedimenten, die Vivianit enthalten, verst\u00e4rken und zu thermodynamisch instabilen Bedingungen f\u00fcr Vivianit f\u00fchren. Das letzte Experiment untersuchte die in-situ Stabilit\u00e4t von unsubstituiertem und Mn-Mg-substituiertem Vivianit, gemischt mit Meeressand und mit oder ohne die Zugabe von Kalziumkarbonat. Die Mischungen wurden 56 Tage lang in zwei Gezeitenzonen inkubiert, von denen ein Standort eine niedrige und der andere eine hohe Sulfidkonzentration aufwies. Die Inkubation von unsubstituiertem und Mn-Mg-substituiertem Vivianit bei unterschiedlichen Sulfidkonzentrationen ergab eine teilweise Aufl\u00f6sung von Vivianit, die durch die isomorphe Substitution deutlich verst\u00e4rkt wurde. Der gr\u00f6\u00dfte Teil der verbleibenden Mineralphase wurde weiterhin als Vivianit charakterisiert, was darauf hindeutet, dass ein Teil des Vivianits \u00fcber die Versuchsdauer erhalten blieb. Bei niedrigen Sulfidkonzentrationen war Gr\u00fcner Rost das Hauptumwandlungsprodukt, das wahrscheinlich einen Teil des freigesetzten Phosphats adsorbierte. Bei hohem Sulfidgehalt dominierte die Bildung von Fe-Sulfidmineralen, welche aufgrund der geringen Sorptionskapazit\u00e4t f\u00fcr Phosphat zu einem erh\u00f6hten P-Verlust f\u00fchrte. Ein erh\u00f6htes Sorptionspotenzial f\u00fcr Phosphat durch die Zugabe von Kalziumkarbonat k\u00f6nnte den Phosphatverlust geringf\u00fcgig verringern. Diese Ergebnisse zeigen, dass vivianithaltige Sedimente als Quelle f\u00fcr bioverf\u00fcgbares Phosphat dienen k\u00f6nnen, wenn sich die geochemischen Bedingungen \u00e4ndern. Diese Arbeit liefert neue experimentelle Ans\u00e4tze zur Untersuchung und Quantifizierung von Umwandlungs- und Bildungsprozessen von Vivianit. Die Ergebnisse zeigen eine schnelle in-situ Bildungskinetik, w\u00e4hrend die Aufl\u00f6sung von Vivianit unter den untersuchten Bedingungen langsam verl\u00e4uft. Die schnelle in-situ Bildungskinetik deutet darauf hin, dass die Vivianitbildung die P-Retention in Umgebungen mit sowohl schwankenden als auch stabilen geochemischen Bedingungen regulieren kann. Die Ver\u00e4nderungen der Kristallstruktur und -morphologie durch isomorphe Substitution erh\u00f6hten das Ausma\u00df der Aufl\u00f6sung und Umwandlung des Vivianits. Aufgrund der langsamen in-situ Aufl\u00f6sung k\u00f6nnte Vivianit bei kurzfristigen Umweltst\u00f6rungen eine stabile P-Retentionsphase darstellen. Langfristig destabilisierende Bedingungen k\u00f6nnten jedoch zu einer vollst\u00e4ndigen Aufl\u00f6sung f\u00fchren und die P-Retentionskapazit\u00e4t des Sediments schw\u00e4chen. Die Ergebnisse unterstreichen die Bedeutung von Vivianit als P-Retentionsphase in salzarmen K\u00fcstensedimenten, k\u00f6nnten aber auch f\u00fcr das Verst\u00e4ndnis von Bildungs- und Umwandlungsprozessen von Vivianit in anderen Umweltsystemen, wie limnischen Sedimenten und B\u00f6den in Feuchtgebieten, von Bedeutung sein. Dar\u00fcber hinaus haben diese Ergebnisse Auswirkungen auf andere Forschungsbereiche, wie die Gew\u00e4ssersanierung und die industrielle P-R\u00fcckgewinnung.", "keywords": ["iron biogeochemistry", "info:eu-repo/classification/ddc/550", "Phosphorus cycling", "Coastal biogeochemistry", "X-ray absorption spectroscopy", "Laboratory experiments", "VIVIANITE (MINERALOGY)", "Field experiments", "6. Clean water", "M\u00f6ssbauer Spectroscopy", "Earth sciences", "X-Ray Diffraction", "13. Climate action", "IRON PHOSPHATES (INORGANIC CHEMISTRY)", "14. Life underwater", "iron minerals", "mineral transformation", "Redox geochemistry"], "contacts": [{"organization": "Kubeneck, Luisa Jo\u00eblle", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.3929/ethz-b-000663192"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Thesis/Dissertation", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3929/ethz-b-000663192", "name": "item", "description": "10.3929/ethz-b-000663192", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3929/ethz-b-000663192"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-01-01T00:00:00Z"}}, {"id": "10.6092/unibo/amsacta/5710", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:24:17Z", "type": "Journal Article", "title": "Consolidation of sugaring marble by hydroxyapatite: some recent developments on producing and treating decayed samples", "description": "Consolidation of sugaring marble (i.e., marble affected by granular disaggregation) still lacks fully effective solutions. Consequently, the use of an innovative phosphate-based treatment, aimed at bonding calcite grains by formation of hydroxyapatite at grain boundaries, has recently been proposed. In this paper, firstly a novel method for producing artificially decayed marble samples, by contact with a heating plate, is proposed. Then, some results are presented about the effectiveness and the compatibility of two different formulations of the phosphate treatment, differing in terms of concentration of the phosphate precursor (3.0 M or 0.1 M aqueous solutions of diammonium hydrogen phosphate, DAP), possible ethanol addition to the DAP solution and number of DAP solution applications (1 or 2). The results of the study point out that the new weathering method allows to obtain specimens with a gradient in microstructural and mechanical properties with thickness, just like naturally weathered samples. Both phosphate treatments were able to significantly improve marble cohesion, without causing significant changes in thermal behaviour and aesthetic appearance after treatment. The addition of small quantities of ethanol to the DAP solution seems to be a very promising method for favouring HAP formation and improving the treatment performance.", "keywords": ["0103 physical sciences", "Grain loss; Thermal ageing; Thermal diffusivity; Calcium phosphates; Ethanol", "02 engineering and technology", "ING-IND/22 Scienza e tecnologia dei materiali", "0210 nano-technology", "01 natural sciences", "6. Clean water"], "contacts": [{"organization": "SASSONI, ENRICO, GRAZIANI, GABRIELA, FRANZONI, ELISA, Scherer G. W.,", "roles": ["creator"]}]}, "links": [{"href": "https://cris.unibo.it/bitstream/11585/563444/1/Sassoni%20et%20al%20%282016%29%20Some%20Developments%20on%20HAP.pdf"}, {"href": "https://doi.org/10.6092/unibo/amsacta/5710"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20and%20Art%3A%20A%20Future%20for%20Stone%3A%20Proceedings%20of%20the%2013th%20International%20Congress%20on%20the%20Deterioration%20and%20Conservation%20of%20Stone", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.6092/unibo/amsacta/5710", "name": "item", "description": "10.6092/unibo/amsacta/5710", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.6092/unibo/amsacta/5710"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-01-01T00:00:00Z"}}, {"id": "10.6092/unibo/amsacta/5712", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:24:17Z", "type": "Journal Article", "title": "Mineral consolidants", "description": "Inorganic consolidants, such as ethyl silicate, nanolime and ammonium oxalate, have proven to be effective for certain materials, but each has its drawbacks. This has recently led to the investigation of hydroxyapatite (HAP) as a novel inorganic consolidant, which demonstrated excellent performance on carbonate stones. Considering that a mineral that matched calcite crystal lattice parameters even more closely than HAP would be expected to provide a consolidating action even greater than HAP, in this study aluminum phosphate (AP) was investigated as a potential new consolidant. Indeed, AP has lattice parameters differing from those of calcite by only 1%. The consolidating ability of AP was preliminarily investigated here in comparison with HAP. Both treatments were tested on artificially weathered marble samples, in the view of their application for conservation of sugaring marble. A novel method is also proposed for producing samples with near-surface damage similar to that of sugaring marble in the field. The results of the study point out that the novel weathering method is able to provide samples with tailored gradient in dynamic elastic modulus, closely resembling naturally sugaring marble. The AP treatment was found to significantly improve the dynamic elastic modulus of weathered marble, at least as efficiently as the HAP treatment investigated in this study. This confirmed the high potential of AP as a new inorganic consolidant.", "keywords": ["Marble; Inorganic consolidants", " Hydroxyapatite; Calcium phosphates", "ING-IND/22 Scienza e tecnologia dei materiali", "Marble; Limestone; Calcium phosphates; Consolidation"], "contacts": [{"organization": "George W. Scherer, SASSONI, ENRICO,", "roles": ["creator"]}]}, "links": [{"href": "https://cris.unibo.it/bitstream/11585/563450/5/Covegno%20RILEM%20Copenhagen.pdf"}, {"href": "https://doi.org/10.6092/unibo/amsacta/5712"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20International%20RILEM%20Conference%20Materials%2C%20Systems%20and%20Structures%20in%20Civil%20Engineering%202016%20-%20Segment%20on%20Historical%20Masonry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.6092/unibo/amsacta/5712", "name": "item", "description": "10.6092/unibo/amsacta/5712", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.6092/unibo/amsacta/5712"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-01-01T00:00:00Z"}}, {"id": "1983/a5889e45-1f43-4487-9f8c-175983128b32", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:25:08Z", "type": "Journal Article", "created": "2021-02-08", "title": "Mercury Reduction by Nanoparticulate Vivianite", "description": "Open AccessISSN:0013-936X", "keywords": ["abiotic Hg II reduction", "Chemical Sciences not elsewhere classified", "Physiology", "0211 other engineering and technologies", "02 engineering and technology", "Hg 0", "Hg II", "PO", "01 natural sciences", "Phosphates", "Environmental Sciences not elsewhere classified", "Ferrous Compounds", "Hg II reducers", "Molecular Biology", "ferrous iron phosphate mineral vivi.", "Ecosystem", "0105 earth and related environmental sciences", "Pharmacology", "Fe II content", "Ecology", "Nanoparticulate Vivianite Mercury", "Cell Biology", "Mercury", "6. Clean water", "Fe II 3", "13. Climate action", "Oxidation-Reduction", "Biological Sciences not elsewhere classified"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.0c05203"}, {"href": "https://doi.org/1983/a5889e45-1f43-4487-9f8c-175983128b32"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "1983/a5889e45-1f43-4487-9f8c-175983128b32", "name": "item", "description": "1983/a5889e45-1f43-4487-9f8c-175983128b32", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/1983/a5889e45-1f43-4487-9f8c-175983128b32"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-02-08T00:00:00Z"}}, {"id": "20.500.11850/663192", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:25:16Z", "type": "Report", "title": "Vivianite formation and transformation processes in intertidal sediments and the influence of isomorphic substitution", "keywords": ["Earth sciences", "info:eu-repo/classification/ddc/550", "iron minerals; VIVIANITE (MINERALOGY); IRON PHOSPHATES (INORGANIC CHEMISTRY); Coastal biogeochemistry; mineral transformation; Redox geochemistry; M\u00f6ssbauer Spectroscopy; X-ray absorption spectroscopy; Field experiments; Laboratory experiments; iron biogeochemistry; Phosphorus cycling; X-Ray Diffraction"], "contacts": [{"organization": "Kubeneck, Luisa Jo\u00eblle; id_orcid0000-0003-1894-6809", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/20.500.11850/663192"}, {"rel": "self", "type": "application/geo+json", "title": "20.500.11850/663192", "name": "item", "description": "20.500.11850/663192", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/20.500.11850/663192"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-01-01T00:00:00Z"}}, {"id": "21.11116/0000-000B-3E93-A", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:25:22Z", "type": "Journal Article", "created": "2022-07-22", "title": "Energy status-promoted growth and development of Arabidopsis require copper deficiency response transcriptional regulator SPL7", "description": "Abstract

Copper (Cu) is a cofactor of around 300 Arabidopsis proteins, including photosynthetic and mitochondrial electron transfer chain enzymes critical for adenosine triphosphate (ATP) production and carbon fixation. Plant acclimation to Cu deficiency requires the transcription factor SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE7 (SPL7). We report that in the wild type (WT) and in the spl7-1 mutant, respiratory electron flux via Cu-dependent cytochrome c oxidase is unaffected under both normal and low-Cu cultivation conditions. Supplementing Cu-deficient medium with exogenous sugar stimulated growth of the WT, but not of spl7 mutants. Instead, these mutants accumulated carbohydrates, including the signaling sugar trehalose 6-phosphate, as well as ATP and NADH, even under normal Cu supply and without sugar supplementation. Delayed spl7-1 development was in agreement with its attenuated sugar responsiveness. Functional TARGET OF RAPAMYCIN and SNF1-RELATED KINASE1 signaling in spl7-1 argued against fundamental defects in these energy-signaling hubs. Sequencing of chromatin immunoprecipitates combined with transcriptome profiling identified direct targets of SPL7-mediated positive regulation, including Fe SUPEROXIDE DISMUTASE1 (FSD1), COPPER-DEFICIENCY-INDUCED TRANSCRIPTION FACTOR1 (CITF1), and the uncharacterized bHLH23 (CITF2), as well as an enriched upstream GTACTRC motif. In summary, transducing energy availability into growth and reproductive development requires the function of SPL7. Our results could help increase crop yields, especially on Cu-deficient soils.Copper (Cu) is a cofactor of around 300 Arabidopsis proteins, including photosynthetic and mitochondrial electron transfer chain enzymes critical for adenosine triphosphate (ATP) production and carbon fixation. Plant acclimation to Cu deficiency requires the transcription factor SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE7 (SPL7). We report that in the wild type (WT) and in the spl7-1 mutant, respiratory electron flux via Cu-dependent cytochrome c oxidase is unaffected under both normal and low-Cu cultivation conditions. Supplementing Cu-deficient medium with exogenous sugar stimulated growth of the WT, but not of spl7 mutants. Instead, these mutants accumulated carbohydrates, including the signaling sugar trehalose 6-phosphate, as well as ATP and NADH, even under normal Cu supply and without sugar supplementation. Delayed spl7-1 development was in agreement with its attenuated sugar responsiveness. Functional TARGET OF RAPAMYCIN and SNF1-RELATED KINASE1 signaling in spl7-1 argued against fundamental defects in these energy-signaling hubs. Sequencing of chromatin immunoprecipitates combined with transcriptome profiling identified direct targets of SPL7-mediated positive regulation, including Fe SUPEROXIDE DISMUTASE1 (FSD1), COPPER-DEFICIENCY-INDUCED TRANSCRIPTION FACTOR1 (CITF1), and the uncharacterized bHLH23 (CITF2), as well as an enriched upstream GTACTRC motif. In summary, transducing energy availability into growth and reproductive development requires the function of SPL7. Our results could help increase crop yields, especially on Cu-deficient soils.Crops have different strategies to acquire poorly-available soil phosphorus (P) which are dependent on their architectural, morphological, and physiological root traits, but their capacity to enhance P acquisition varies with the type of fertilizer applied. The objective of this study was to examine how P-acquisition strategies of three main crops are affected by the application of sewage sludges, compared with a mineral P fertilizer. We carried out a 3-months greenhouse pot experiment and compared the response of P-acquisition traits among wheat, barley and canola in a soil amended with three sludges or a mineral P fertilizer. Results showed that the P-acquisition strategy differed among crops. Compared with canola, wheat and barley had a higher specific root length and a greater root carboxylate release and they acquired as much P from sludge as from mineral P. By contrast, canola shoot P content was greater with sludge than with mineral P. This was attributed to a higher root-released acid phosphatase activity which promoted the mineralization of sludge-derived P-organic. This study showed that contrasted P-acquisition strategies of crops allows increased use of renewable P resources by optimizing combinations of crop and the type of P fertilizer applied within the cropping system.

Root citrate exudation is thought to be important for phosphate solubilization. Previous research has concluded that cluster\uffe2\uff80\uff90like roots benefit most from this exudation in terms of increased phosphate uptake, suggesting that root structure plays an important role in citrate\uffe2\uff80\uff90enhanced uptake (additional phosphate uptake due to citrate exudation).

Time\uffe2\uff80\uff90resolved computed tomography images of wheat root systems were used as the geometry for 3D citrate\uffe2\uff80\uff90phosphate solubilization models. Citrate\uffe2\uff80\uff90enhanced uptake was correlated with morphological measures of the root systems to determine which had the most benefit.

A large variation of citrate\uffe2\uff80\uff90enhanced uptake over 11 root structures was observed. Root surface area dominated absolute phosphate uptake, but did not explain citrate\uffe2\uff80\uff90enhanced uptake. Number of exuding root tips correlated well with citrate\uffe2\uff80\uff90enhanced uptake. Root tips in close proximity could collectively exude high amounts of citrate, resulting in a delayed spike in citrate\uffe2\uff80\uff90enhanced uptake.

Root system architecture plays an important role in citrate\uffe2\uff80\uff90enhanced uptake. Singular morphological measurements of the root systems cannot entirely explain variations in citrate\uffe2\uff80\uff90enhanced uptake. Root systems with many tips would benefit greatly from citrate exudation. Quantifying citrate\uffe2\uff80\uff90enhanced uptake experimentally is difficult as variations in root surface area would overwhelm citrate benefits.

Root citrate exudation is thought to be important for phosphate solubilization. Previous research has concluded that cluster\uffe2\uff80\uff90like roots benefit most from this exudation in terms of increased phosphate uptake, suggesting that root structure plays an important role in citrate\uffe2\uff80\uff90enhanced uptake (additional phosphate uptake due to citrate exudation).

Time\uffe2\uff80\uff90resolved computed tomography images of wheat root systems were used as the geometry for 3D citrate\uffe2\uff80\uff90phosphate solubilization models. Citrate\uffe2\uff80\uff90enhanced uptake was correlated with morphological measures of the root systems to determine which had the most benefit.

A large variation of citrate\uffe2\uff80\uff90enhanced uptake over 11 root structures was observed. Root surface area dominated absolute phosphate uptake, but did not explain citrate\uffe2\uff80\uff90enhanced uptake. Number of exuding root tips correlated well with citrate\uffe2\uff80\uff90enhanced uptake. Root tips in close proximity could collectively exude high amounts of citrate, resulting in a delayed spike in citrate\uffe2\uff80\uff90enhanced uptake.

Root system architecture plays an important role in citrate\uffe2\uff80\uff90enhanced uptake. Singular morphological measurements of the root systems cannot entirely explain variations in citrate\uffe2\uff80\uff90enhanced uptake. Root systems with many tips would benefit greatly from citrate exudation. Quantifying citrate\uffe2\uff80\uff90enhanced uptake experimentally is difficult as variations in root surface area would overwhelm citrate benefits.

Crops have different strategies to acquire poorly-available soil phosphorus (P) which are dependent on their architectural, morphological, and physiological root traits, but their capacity to enhance P acquisition varies with the type of fertilizer applied. The objective of this study was to examine how P-acquisition strategies of three main crops are affected by the application of sewage sludges, compared with a mineral P fertilizer. We carried out a 3-months greenhouse pot experiment and compared the response of P-acquisition traits among wheat, barley and canola in a soil amended with three sludges or a mineral P fertilizer. Results showed that the P-acquisition strategy differed among crops. Compared with canola, wheat and barley had a higher specific root length and a greater root carboxylate release and they acquired as much P from sludge as from mineral P. By contrast, canola shoot P content was greater with sludge than with mineral P. This was attributed to a higher root-released acid phosphatase activity which promoted the mineralization of sludge-derived P-organic. This study showed that contrasted P-acquisition strategies of crops allows increased use of renewable P resources by optimizing combinations of crop and the type of P fertilizer applied within the cropping system. It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

", "keywords": ["Acid-Base Equilibrium", "0301 basic medicine", "Rana catesbeiana", "Carbon Dioxide", "Hydrogen-Ion Concentration", "Phosphates", "Electrophysiology", "Solutions", "Bicarbonates", "03 medical and health sciences", "0302 clinical medicine", "Gastric Mucosa", "Potassium", "Animals", "Anura"], "contacts": [{"organization": "William Silen, JG Forte, T E Machen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/asaseandtetteh,2015"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "asaseandtetteh,2015", "name": "item", "description": "asaseandtetteh,2015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/asaseandtetteh,2015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "bravomartinez,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:29:25Z", "type": "Journal Article", "created": "2017-12-22", "description": "

It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

", "keywords": ["Acid-Base Equilibrium", "0301 basic medicine", "Rana catesbeiana", "Carbon Dioxide", "Hydrogen-Ion Concentration", "Phosphates", "Electrophysiology", "Solutions", "Bicarbonates", "03 medical and health sciences", "0302 clinical medicine", "Gastric Mucosa", "Potassium", "Animals", "Anura"], "contacts": [{"organization": "William Silen, JG Forte, T E Machen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/bravomartinez,2015"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "bravomartinez,2015", "name": "item", "description": "bravomartinez,2015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/bravomartinez,2015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "e9e5c4f6-cd43-4b91-9504-33e4850b2e37", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[9.08, 51.14], [9.08, 53.35], [11.62, 53.35], [11.62, 51.14], [9.08, 51.14]]]}, "properties": {"rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Module A-Project - InnoSoilPhos's research activities.\" Although every care has been taken in preparing and testing the data, the BonaRes Module A-Project - InnoSoilPhos and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Module A-Project - InnoSoilPhos and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project - InnoSoilPhos and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data. The access to this data is restricted during embargo time. If prior access is requested, contact the data owner / author.", "updated": "2021-03-03", "type": "Service", "created": "2019-11-14", "language": "eng", "title": "WMS Service of the dataset 'Field experiment FV 4 Braunschweig \u2013 harvest of winter barley 2014'", "description": "This WMS Service includes spatial information used by datasets 'WMS Service of the dataset 'Field experiment FV 4 Braunschweig \u2013 harvest of winter barley 2014''", "keywords": ["infoMapAccessService", "Soil", "Phosphate fertilizers", "Phosphates", "Phosphate fertilizers", "farm inputs"], "contacts": [{"name": "Panten, Kerstin", "organization": "Julius K\u00fchn-Institut, Institut f\u00fcr Pflanzenbau und Bodenkunde", "position": "Research Scientist", "roles": ["author"], "phones": [{"value": "00 49 (0) 531 5962111"}], "emails": [{"value": "kerstin.panten@julius-kuehn.de"}], "addresses": [{"deliveryPoint": ["Bundesallee 69"], "city": "Braunschweig", "administrativeArea": "Lower Saxony", "postalCode": "38116", "country": "Germany"}], "links": [{"href": {"url": "https://orcid.org/", "protocol": null, "protocol_url": "", "name": "0000-0003-3723-7549", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Panten, Kerstin", "organization": "Julius K\u00fchn-Institut, Institut f\u00fcr Pflanzenbau und Bodenkunde", "position": "Research Scientist", "roles": ["projectLeader"], "phones": [{"value": "00 49 (0) 531 5962111"}], "emails": [{"value": "kerstin.panten@julius-kuehn.de"}], "addresses": [{"deliveryPoint": ["Bundesallee 69"], "city": "Braunschweig", "administrativeArea": "Lower Saxony", "postalCode": "38116", "country": "Germany"}], "links": [{"href": {"url": "https://orcid.org/", "protocol": null, "protocol_url": "", "name": "000-0003-3723-7549", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "BonaRes Data Centre", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - WG Geodata", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 171"}], "emails": [{"value": "bonares-datenzentrum@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "Julius K\u00fchn-Institut, Institut f\u00fcr Pflanzenbau und Bodenkunde", "roles": ["contributor"]}], "themes": [{"concepts": [{"id": "infoMapAccessService"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}, {"concepts": [{"id": "Soil"}, {"id": "Phosphate fertilizers"}, {"id": "Phosphates"}, {"id": "Phosphate fertilizers"}, {"id": "farm inputs"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=e9e5c4f6-cd43-4b91-9504-33e4850b2e37", "rel": "information"}, {"href": "https://maps.bonares.de/wss/service/ags-relay/ags/guest/arcgis/rest/services/Innosoilphos/INNOSOILPHOS_ID_4035_Location/MapServer/WMSServer?request=GetCapabilities&service=WMS"}, {"href": "https://maps.bonares.de/wss/service/ags-relay/ags/guest/arcgis/rest/services/Innosoilphos/INNOSOILPHOS_ID_4035_Location/MapServer/WMSServer?request=GetCapabilities&service=WMS"}, {"href": "https://maps.bonares.de/wss/service/ags-relay/ags/guest/arcgis/rest/services/Innosoilphos/INNOSOILPHOS_ID_4035_Location/MapServer/WMSServer?request=GetCapabilities&service=WMS"}, {"href": "https://maps.bonares.de/wss/service/ags-relay/ags/guest/arcgis/rest/services/Innosoilphos/INNOSOILPHOS_ID_4035_Location/MapServer/WMSServer?request=GetCapabilities&service=WMS"}, {"rel": "self", "type": "application/geo+json", "title": "e9e5c4f6-cd43-4b91-9504-33e4850b2e37", "name": "item", "description": "e9e5c4f6-cd43-4b91-9504-33e4850b2e37", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/e9e5c4f6-cd43-4b91-9504-33e4850b2e37"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-03-03T00:00:00Z"}}, {"id": "9dd3bd40-4ce9-4bda-8642-85415cf3a3ed", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[5.81, 47.26], [5.81, 54.76], [15.77, 54.76], [15.77, 47.26], [5.81, 47.26]]]}, "properties": {"themes": [{"concepts": [{"id": "environment"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "Phosphate fertilizers"}, {"id": "fertilizers"}, {"id": "farm inputs"}, {"id": "Phosphates"}, {"id": "Bones"}, {"id": "Laboratory experimentation"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "Fe- Al-Hydroxide"}, {"id": "Phosphorus"}, {"id": "Adsorption"}, {"id": "FT-IR spectrsocopy"}, {"id": "Gibbsite"}, {"id": "Ferrihydrite"}, {"id": "opendata"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}, {"id": "Phosphorus"}, {"id": "Adsorption"}, {"id": "Spectroscopy"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Module A-Project - InnoSoilPhos's research activities.\"\n\nAlthough every care has been taken in preparing and testing the data, the BonaRes Module A-Project - InnoSoilPhos and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Module A-Project - InnoSoilPhos and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project - InnoSoilPhos and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data. The access to this data is restricted during embargo time. If prior access is requested, contact the data owner / author.", "updated": "2020-07-29", "type": "Dataset", "created": "2020-03-06", "language": "eng", "title": "Normalized FT-IR spectra of crystalline and amorphous Fe- Al-hydroxides during P adsorption", "description": "Fourier-Transform Infrared (FT-IR) spectroscopic analyses were carried out during P adsorption on highly crystalline gibbsite, poorly crystalline 2-line-ferrihydrite and amorphous Fe:Al-hydroxide mixtures in the molar ratio 1:0, 10:1, 1:1, 1:10 and 0:1. The elemental composition of the adsorbents was verified by using SEM-EDX, scanning electron microscopy (DSM 962, Zeiss, Oberkochen, Germany) with energy dispersive X-ray spectroscopy (X-Max 50 mm\u00b2 with INCA, Oxford Instruments, Abingdon, Great Britain). The formation of pure Al(OH)3 and FeO(OH) for the amorphous hydroxides was revealed. Determination of the adsorbent crystallization as well as amorphous structures was carried out by X-ray diffraction (XRD) using a PANalytical Empyrean powder diffractometer (Almelo, Netherlands) from GFZ Potsdam, with a theta-theta-goniometer, Cu-K\u03b1 radiation (\u03bb=0.15418 nm), automatic divergent and anti-scatter slits and a PIXcel3D detector. Diffraction data were recorded from 4.6\u00b0 to 84.9\u00b0 2\u03f4 with a step-size of 0.0131 and a step time of 58.4 s. The generator settings were 40 kV and 40 mA. Specific surface areas of all adsorbents were determined with an Autosorb-1 (Quantachrome, Odelzhausen, Germany) using a multi-point BET-measurement (Brunauer-Emmett-Teller) and N2 as adsorptive medium. \nP adsorption was investigated with batch experiments, in which a solid-solution ratio of 1:20 was chosen for gibbsite, and a solid-solution ratio of 1:200 was chosen for ferrihydrite and the Fe:Al-hydroxide mixtures due to their high specific surface areas and P-adsorption capacity. The initial P-concentrations for the adsorption experiments were 150 \u00b5mol l-1, 1000 \u00b5mol l-1 and 2000 \u00b5mol l-1 KH2PO4 for gibbsite and 1000 \u00b5mol l-1, 2000 \u00b5mol l-1 and 5000 \u00b5mol l-1 KH2PO4 for ferrihydrite and the Fe:Al-hydroxides with a 0.01 mol l-1 CaCl2-background electrolyte solution, adjusted to a pH of 6. For P measurements, the gibbsite and ferrihydrite samples were centrifuged for 15 min at 336 \u00d7 G, while the Fe:Al-hydroxide samples were centrifuged for 15 min at 21572 \u00d7 G. The clear supernatant was filtered by using P-poor Whatman 512 1/1 filters. For FT-IR spectroscopic measurements, the remaining solid matter was dried for 24 h at 40\u00b0C, stored overnight in a desiccator and analyzed without further treatment. IR spectroscopic measurements were carried out by measurement of the absorbance in the FT-IR DRIFT mode (Tensor 27 HTS-XT, Bruker, Billerica, USA) with 40 scans per sample, a wavenumber range from 4000 to 400 cm-1, and a resolution of 1.9 cm-1.\n\nResearch domain: Plant Nutrition\n\nResearch question: Which P bindings are formed on the various mineral Fe- and Al-hydroxide surfaces and how do inorganic and organic compounds contribute to the availability of both adsorbed/precipitated and naturally bound phosphorus from phosphate minerals?", "formats": [{"name": "CSV"}], "keywords": ["Soil", "Phosphate fertilizers", "fertilizers", "farm inputs", "Phosphates", "Bones", "Laboratory experimentation", "Fe- Al-Hydroxide", "Phosphorus", "Adsorption", "FT-IR spectrsocopy", "Gibbsite", "Ferrihydrite", "opendata", "Boden", "Phosphorus", "Adsorption", "Spectroscopy"], "contacts": [{"name": "Stella Gypser", "organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "position": "Researcher", "roles": ["author"], "phones": [{"value": "00 49 (0) 355 693318"}], "emails": [{"value": "stella.gypser@b-tu.de"}], "addresses": [{"deliveryPoint": ["Konrad-Wachsmann-Allee 6"], "city": "Cottbus", "administrativeArea": "Brandenburg", "postalCode": "03046", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-4765-8067", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Stella Gypser", "organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "position": "Researcher", "roles": ["dataCollector"], "phones": [{"value": "00 49 (0) 355 693318"}], "emails": [{"value": "stella.gypser@b-tu.de"}], "addresses": [{"deliveryPoint": ["Konrad-Wachsmann-Allee 6"], "city": "Cottbus", "administrativeArea": "Brandenburg", "postalCode": "03046", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-4765-8067", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "BonaRes Data Centre", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - WG Geodata", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 171"}], "emails": [{"value": "bonares-datenzentrum@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Dirk Freese", "organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "position": "Researcher", "roles": ["workPackageLeader"], "phones": [{"value": "00 49 (0) 355 694238"}], "emails": [{"value": "dirk.freese@b-tu.de"}], "addresses": [{"deliveryPoint": ["Konrad-Wachsmann-Allee 6"], "city": "Cottbus", "administrativeArea": "Brandenburg", "postalCode": "03046", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-9837-7441", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Leinweber, Peter", "organization": "University of Rostock", "position": "Professor", "roles": ["projectLeader"], "phones": [{"value": "+49 381 498 3120"}], "emails": [{"value": "peter.leinweber@uni-rostock.de"}], "addresses": [{"deliveryPoint": ["Justus-von-Liebig-Weg 6"], "city": "Rostock", "administrativeArea": "Mecklenburg-Vorpommern", "postalCode": "18051", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=9dd3bd40-4ce9-4bda-8642-85415cf3a3ed", "rel": "download"}, {"rel": "self", "type": "application/geo+json", "title": "9dd3bd40-4ce9-4bda-8642-85415cf3a3ed", "name": "item", "description": "9dd3bd40-4ce9-4bda-8642-85415cf3a3ed", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/9dd3bd40-4ce9-4bda-8642-85415cf3a3ed"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-07-29T00:00:00Z"}}, {"id": "gonzalezalfaro,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:30:28Z", "type": "Journal Article", "created": "2017-12-22", "description": "

It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

", "keywords": ["Acid-Base Equilibrium", "0301 basic medicine", "Rana catesbeiana", "Carbon Dioxide", "Hydrogen-Ion Concentration", "Phosphates", "Electrophysiology", "Solutions", "Bicarbonates", "03 medical and health sciences", "0302 clinical medicine", "Gastric Mucosa", "Potassium", "Animals", "Anura"], "contacts": [{"organization": "William Silen, JG Forte, T E Machen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/gonzalezalfaro,2015"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "gonzalezalfaro,2015", "name": "item", "description": "gonzalezalfaro,2015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/gonzalezalfaro,2015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "guo,t.,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:30:28Z", "type": "Journal Article", "created": "2017-12-22", "description": "

It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

", "keywords": ["Acid-Base Equilibrium", "0301 basic medicine", "Rana catesbeiana", "Carbon Dioxide", "Hydrogen-Ion Concentration", "Phosphates", "Electrophysiology", "Solutions", "Bicarbonates", "03 medical and health sciences", "0302 clinical medicine", "Gastric Mucosa", "Potassium", "Animals", "Anura"], "contacts": [{"organization": "William Silen, JG Forte, T E Machen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/guo,t.,2015"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "guo,t.,2015", "name": "item", "description": "guo,t.,2015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/guo,t.,2015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "2f559cf4-8685-40b3-a6e1-4ad4a9120168", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[12.22, 53.99], [12.22, 54.02], [12.28, 54.02], [12.28, 53.99], [12.22, 53.99]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}], "scheme": "GEMET - Concepts, version 2.4"}, {"concepts": [{"id": "opendata"}, {"id": "specific UV absorbance (SUVA)"}], "scheme": "Individual"}, {"concepts": [{"id": "redox potential"}, {"id": "subsoil"}, {"id": "soil water constants"}, {"id": "elements"}, {"id": "plant available phosphorus"}, {"id": "total phosphorus"}, {"id": "carbon"}, {"id": "dissolved inorganic carbon"}, {"id": "dissolved organic carbon"}, {"id": "ammonium"}, {"id": "nitrates"}, {"id": "nitrites"}, {"id": "calcium"}, {"id": "aluminium"}, {"id": "iron"}, {"id": "manganese"}, {"id": "soil solution"}, {"id": "phosphates"}, {"id": "drainage water"}, {"id": "lysimeters"}, {"id": "slope"}, {"id": "nitrogen content"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Module A-Project - BonaRes - InnoSoilPhos's research activities.\" Although every care has been taken in preparing and testing the data, the BonaRes Module A-Project - BonaRes - InnoSoilPhos and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Module A-Project - BonaRes - InnoSoilPhos and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project - BonaRes - InnoSoilPhos and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2023-03-28", "type": "Dataset", "created": "2022-04-28", "language": "eng", "title": "Lysimeter data Rostock: Redox potential, pH and element concentrations of pore water in 2021", "description": "The dataset contains soil pore water data from three sampling depths of three soil profiles from along a hill slope in Northern Germany. Data inform about weekly redox potential (Eh), pH and element concentrations (TC, IC, OC, TN, NH4+ -N, NO2- -N, NO3- -N, PO43- -P, total Ca, P, Fe, Al, and Mn) in filtered (0.45 \u00b5m) soil pore water samples collected in 2021.\n\nResearch domain: Soil Sciences\n\nResearch question: Controlled drainage may affect phosphorus mobilization in soil. To assess P mobilization at different redox conditions, three soil profiles with redoximorphic features were selected along a slight hill slope and lysimeter monoliths were collected by drilling in 2018. In 2021, lysimeters were cropped with maize. Five maize plants of each lysimeter were supplied with underfoot fertilizer (P and S) while further five plants of each lysimeter were left without fertilizer. Water levels of the monoliths were adjusted to high and low water table to mimic closed and open drainage, respectively. The redox potential (Eh) was measured in situ and pore water was sampled weekly from three different depths of the lysimeters to determine pH and the element concentrations total C, N, P, Al, Fe, Mn, and Ca as well as inorganic and organic C (DIC, DOC), NH4+-N, NO2- -N, NO3- -N and PO43- -P in solutions (0.45 \u00b5m). Thus, information about different element concentrations at different redox potentials and pH was gained over a period of about 6.5 months in 2021.", "formats": [{"name": "CSV"}], "keywords": ["Soil", "opendata", "specific UV absorbance (SUVA)", "redox potential", "subsoil", "soil water constants", "elements", "plant available phosphorus", "total phosphorus", "carbon", "dissolved inorganic carbon", "dissolved organic carbon", "ammonium", "nitrates", "nitrites", "calcium", "aluminium", "iron", "manganese", "soil solution", "phosphates", "drainage water", "lysimeters", "slope", "nitrogen content"], "contacts": [{"name": "Baumann, Karen", "organization": "University of Rostock; present organization: University of Vechta", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "karen.baumann@uni-rostock.de; present email: karen.baumann@uni-vechta.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": "https://orcid.org", "protocol": null, "protocol_url": "", "name": "0000-0003-1341-052X", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Leinweber, Peter", "organization": "University of Rostock", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "peter.leinweber@uni-rostock.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": "https://orcid.org", "protocol": null, "protocol_url": "", "name": "0000-0003-3776-2984", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "BonaRes Data Center", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "University of Rostock; present organization: University of Vechta", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=2f559cf4-8685-40b3-a6e1-4ad4a9120168", "rel": "download"}, {"rel": "self", "type": "application/geo+json", "title": "2f559cf4-8685-40b3-a6e1-4ad4a9120168", "name": "item", "description": "2f559cf4-8685-40b3-a6e1-4ad4a9120168", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2f559cf4-8685-40b3-a6e1-4ad4a9120168"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-03-28T00:00:00Z"}}, {"id": "2d43d8f7-e485-4df8-aea1-f68347efeabd", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[5.81, 47.26], [5.81, 54.76], [15.77, 54.76], [15.77, 47.26], [5.81, 47.26]]]}, "properties": {"themes": [{"concepts": [{"id": "environment"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "Phosphates"}, {"id": "Phosphate fertilizers"}, {"id": "fertilizers"}, {"id": "farm inputs"}, {"id": "Bones"}, {"id": "Laboratory experimentation"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "Phosphorus"}, {"id": "Adsorption"}, {"id": "Goethite"}, {"id": "Gibbsite"}, {"id": "Ferrihydrite"}, {"id": "Hydroxide"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}, {"id": "Phosphorus"}, {"id": "Adsorption"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Module A-Project - InnoSoilPhos's research activities.\" Although every care has been taken in preparing and testing the data, the BonaRes Module A-Project - InnoSoilPhos and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Module A-Project - InnoSoilPhos and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project - InnoSoilPhos and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data. The access to this data is restricted during embargo time. If prior access is requested, contact the data owner / author.", "updated": "2023-04-12", "type": "Dataset", "created": "2020-03-06", "language": "eng", "title": "Kinetics of P adsorption on crystalline and amorphous Fe- and Al-hydroxides", "description": "P adsorption was investigated using batch experiments on highly crystalline goethite and gibbsite, poorly crystalline 2-line-ferrihydrite and amorphous Fe:Al-hydroxide mixtures in the molar ratio 1:0, 10:1, 1:1, 1:10 and 0:1. A solid-solution ratio of 1:20 was chosen for gibbsite, and a solid-solution ratio of 1:200 was chosen for ferrihydrite and the Fe:Al-hydroxide mixtures due to their high specific surface areas and P-adsorption capacity. The initial P-concentrations for the adsorption experiments were 150 \u00b5mol l-1, 1000 \u00b5mol l-1 and 2000 \u00b5mol l-1 KH2PO4 for gibbsite and 1000 \u00b5mol l-1, 2000 \u00b5mol l-1 and 5000 \u00b5mol l-1 KH2PO4 for ferrihydrite and the Fe:Al-hydroxides with a 0.01 mol l-1 CaCl2-background electrolyte solution, adjusted to a pH of 6. For P measurements, the gibbsite and ferrihydrite samples were centrifuged for 15 min at 336 \u00d7 G, while the Fe:Al-hydroxide samples were centrifuged for 15 min at 21572 \u00d7 G. The clear supernatant was filtered by using P-poor Whatman 512 1/1 filters.\nThe elemental composition of the adsorbents was verified by using SEM-EDX, scanning electron microscopy (DSM 962, Zeiss, Oberkochen, Germany) with energy dispersive X-ray spectroscopy (X-Max 50 mm\u00b2 with INCA, Oxford Instruments, Abingdon, Great Britain). The formation of pure Al(OH)3 and FeO(OH) for the amorphous hydroxides was revealed. Determination of the adsorbent crystallization as well as amorphous structures was carried out by X-ray diffraction (XRD) using a PANalytical Empyrean powder diffractometer (Almelo, Netherlands) from GFZ Potsdam, with a theta-theta-goniometer, Cu-K\u03b1 radiation (\u03bb=0.15418 nm), automatic divergent and anti-scatter slits and a PIXcel3D detector. Diffraction data were recorded from 4.6\u00b0 to 84.9\u00b0 2\u03f4 with a step-size of 0.0131 and a step time of 58.4 s. The generator settings were 40 kV and 40 mA. Specific surface areas of all adsorbents were determined with an Autosorb-1 (Quantachrome, Odelzhausen, Germany) using a multi-point BET-measurement (Brunauer-Emmett-Teller) and N2 as adsorptive medium. \nThe P adsorption kinetics of goethite showed an adsorbed P amount of 100 % (0.2 \u00b5mol m-2) for an initial P concentration of 150 \u00b5mol l-1, 100 % (1.2 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, and 100 % (2.4 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, respectively after an adsorption time of 2688 h (16 weeks). \nThe P adsorption by gibbsite increased strongly with increasing initial P concentration and totaled 100 % (3.2 \u00b5mol m-2) for an initial P concentration of 150 \u00b5mol l-1, 45 % (10.2 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, and 42 % (19.5 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, respectively after an adsorption time of 2688 h. \nThe P adsorption kinetics of ferrihydrite showed an adsorbed P amount of 100 % (0.01 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 100 % (0.07 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 99 % (0.14 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 1 Fe:0 Al showed an adsorbed P amount of 100 % (17.6 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 100 % (35.7 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 100 % (88.5 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 10 Fe:1 Al showed an adsorbed P amount of 100 % (0.8 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 100 % (1.6 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 100 % (4.1 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 5 Fe:1 Al showed an adsorbed P amount of 100 % (0.9 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 100 % (1.8 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 100 % (4.6 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 1 Fe:1 Al showed an adsorbed P amount of 99 % (2.5 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 100 % (5.0 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 100 % (12.6 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 1 Fe:5 Al showed an adsorbed P amount of 89 % (203.8 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 91 % (427.5 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 97 % (1140.8 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 1 Fe:10 Al showed an adsorbed P amount of 83 % (202.5 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 85 % (428.0 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 94 % (1169.1 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\nThe P adsorption kinetics of 0 Fe:1 Al showed an adsorbed P amount of 65 % (106.2 \u00b5mol m-2) for an initial P concentration of 1000 \u00b5mol l-1, 69 % (228.2 \u00b5mol m-2) for an initial P concentration of 2000 \u00b5mol l-1, and 82 % (688.1 \u00b5mol m-2) for an initial P concentration of 5000 \u00b5mol l-1, respectively after an adsorption time of 2688 h.\n\nResearch domain: Plant Nutrition\n\nResearch question:Which P bindings are formed on the various mineral Fe- and Al-hydroxide surfaces and how do inorganic and organic compounds contribute to the availability of both adsorbed/precipitated and naturally bound phosphorus from phosphate minerals?", "formats": [{"name": "CSV"}], "keywords": ["Soil", "Phosphates", "Phosphate fertilizers", "fertilizers", "farm inputs", "Bones", "Laboratory experimentation", "Phosphorus", "Adsorption", "Goethite", "Gibbsite", "Ferrihydrite", "Hydroxide", "Boden", "Phosphorus", "Adsorption"], "contacts": [{"name": "Stella Gypser", "organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "position": "Researcher", "roles": ["author"], "phones": [{"value": "00 49 (0) 355 693318"}], "emails": [{"value": "stella.gypser@b-tu.de"}], "addresses": [{"deliveryPoint": ["Konrad-Wachsmann-Allee 6"], "city": "Cottbus", "administrativeArea": "Brandenburg", "postalCode": "03046", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-4765-8067", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Stella Gypser", "organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "position": "Researcher", "roles": ["dataCollector"], "phones": [{"value": "00 49 (0) 355 693318"}], "emails": [{"value": "stella.gypser@b-tu.de"}], "addresses": [{"deliveryPoint": ["Konrad-Wachsmann-Allee 6"], "city": "Cottbus", "administrativeArea": "Brandenburg", "postalCode": "03046", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-4765-8067", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "BonaRes Data Centre", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data' - WG Geodata", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 171"}], "emails": [{"value": "bonares-datenzentrum@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Dirk Freese", "organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "position": "Researcher", "roles": ["workPackageLeader"], "phones": [{"value": "00 49 (0) 355 694238"}], "emails": [{"value": "dirk.freese@b-tu.de"}], "addresses": [{"deliveryPoint": ["Konrad-Wachsmann-Allee 6"], "city": "Cottbus", "administrativeArea": "Brandenburg", "postalCode": "03046", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-9837-7441", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Leinweber, Peter", "organization": "University of Rostock", "position": "Professor", "roles": ["projectLeader"], "phones": [{"value": "+49 381 498 3120"}], "emails": [{"value": "peter.leinweber@uni-rostock.de"}], "addresses": [{"deliveryPoint": ["Justus-von-Liebig-Weg 6"], "city": "Rostock", "administrativeArea": "Mecklenburg-Vorpommern", "postalCode": "18051", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "Brandenburgische Technische Universit\u00e4t Cottbus-Senftenberg", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=2d43d8f7-e485-4df8-aea1-f68347efeabd", "rel": "download"}, {"rel": "self", "type": "application/geo+json", "title": "2d43d8f7-e485-4df8-aea1-f68347efeabd", "name": "item", "description": "2d43d8f7-e485-4df8-aea1-f68347efeabd", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2d43d8f7-e485-4df8-aea1-f68347efeabd"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-04-12T00:00:00Z"}}, {"id": "dcc61b52-3767-4d29-bcf0-26c5cec0afd0", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[7.56, 51.39], [7.56, 51.53], [7.74, 51.53], [7.74, 51.39], [7.56, 51.39]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "carbon sequestration"}, {"id": "soil structure"}, {"id": "yield increases"}, {"id": "nitrate-nitrogen"}, {"id": "climatic data"}, {"id": "soil profiles"}, {"id": "soil permeability"}, {"id": "soil fertility"}, {"id": "phosphates"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "base saturation"}, {"id": "total nitrogen"}, {"id": "humus"}, {"id": "biological activity in soil"}, {"id": "soil pore system"}, {"id": "hydraulic conductivity"}, {"id": "cation exchange capacity"}, {"id": "iron"}, {"id": "manganese"}, {"id": "aluminium"}, {"id": "earthworms"}, {"id": "boundary layers"}, {"id": "soil density"}, {"id": "water storage"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "carbon balance"}, {"id": "plant-available phosphate"}, {"id": "plant-available potassium"}, {"id": "plant-available magnesium"}, {"id": "organic label (Biosiegel)"}, {"id": "Boden-pH"}, {"id": "calcium-base saturation"}, {"id": "magnesium-base saturation"}, {"id": "sodium-base saturation"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. 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It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

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It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

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It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.

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