{"type": "FeatureCollection", "features": [{"id": "10.1016/j.chemosphere.2008.07.056", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:36Z", "type": "Journal Article", "created": "2008-10-01", "title": "Integration Of Toxicological And Chemical Tools To Assess The Bioavailability Of Metals And Energetic Compounds In Contaminated Soils", "description": "Bioavailability is critical for understanding effects that might result from exposure of biota to contaminated soils. Soils from military range and training areas (RTAs) are contaminated principally by energetic materials (EM) and metals. Their chemical characteristics are relatively well known and toxicity assessment of soils from RTAs are in some cases available. However, bioavailability on these sites needs to be comprehensively characterized. A holistic approach to bioavailability, incorporating both chemical and earthworm toxicological indicators, was applied to soils from an anti-tank firing range at a Canadian Forces Base. Results showed that HMX and the metals Zn, Pb, Bi and Cd, though not consistently the prevailing toxicants, were the most accessible to earthworms. Some metals (notably Cu, Zn, Cr and Bi) were also accumulated in earthworm tissue but those were not necessarily expected given their bioaccessibility (i.e., the chemical availability of contaminants in the environment for the organisms) at the beginning of the exposure. The tested soils impaired earthworm reproduction and reduced adult growth. Measurement of selected sublethal parameters indicated that lysosomal integrity (determined as the neutral red retention time--NRRT) was decreased, while elevated superoxide dismutase (SOD) activity suggested that earthworms experienced oxidative stress. The correspondence between the NRRT and metal contamination pattern suggested that metals may be the main cause of lysosomal disruption in EM-contaminated soils. The approach to bioavailability appraisal adopted in this case appears to be a promising practice for site-specific assessment of contaminated land.", "keywords": ["zinc/metabolism/pharmacokinetics/toxicity", "assessment", "metals", "Biological Availability", "lead/metabolism/pharmacokinetics/toxicity", "01 natural sciences", "biological availability", "soil pollutants/metabolism/pharmacokinetics/toxicity", "Animals", "Soil Pollutants", "bismuth/metabolism/pharmacokinetics/toxicity", "Oligochaeta", "oligochaeta/rug effects/growth & development/metabolism", "soils", "0105 earth and related environmental sciences", "metals/metabolism/pharmacokinetics/ toxicity", "explosives", "04 agricultural and veterinary sciences", "bioaccessibility", "6. Clean water", "Zinc", "Lead", "Metals", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "cadmium/metabolism/pharmacokinetics/toxicity", "bioavailability", "Bismuth", "Cadmium"], "contacts": [{"organization": "\u00c9meline Valton, Bertin Trottier, Aurelie Auroy, Aurelie Auroy, Yann Berthelot, Pierre Yves Robidoux, Pierre Yves Robidoux,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.chemosphere.2008.07.056"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Chemosphere", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.chemosphere.2008.07.056", "name": "item", "description": "10.1016/j.chemosphere.2008.07.056", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.chemosphere.2008.07.056"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-12-01T00:00:00Z"}}, {"id": "10.1021/acs.est.2c03149", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:17:11Z", "type": "Journal Article", "created": "2022-09-14", "title": "Chemotactic Bacteria Facilitate the Dispersion of Nonmotile Bacteria through Micrometer-Sized Pores in Engineered Porous Media", "description": "Recent research has demonstrated that chemotactic bacteria can disperse inside microsized pores while traveling toward favorable conditions. Microbe-microbe cotransport might enable nonmotile bacteria to be carried with motile partners to enhance their dispersion and reduce their deposition in porous systems. The aim of this study was to demonstrate the enhancement in the dispersion of nonmotile bacteria (Mycobacterium gilvum VM552, a polycyclic aromatic hydrocarbon-degrader, and Sphingobium sp. D4, a hexachlorocyclohexane-degrader, through micrometer-sized pores near the exclusion-cell-size limit, in the presence of motile Pseudomonas putida G7 cells. For this purpose, we used bioreactors equipped with two chambers that were separated with membrane filters with 3, 5, and 12 \u03bcm pore sizes and capillary polydimethylsiloxane (PDMS) microarrays (20 \u03bcm \u00d7 35 \u03bcm \u00d7 2.2 mm). The cotransport of nonmotile bacteria occurred exclusively in the presence of a chemoattractant concentration gradient, and therefore, a directed flow of motile cells. This cotransport was more intense in the presence of larger pores (12 \u03bcm) and strong chemoeffectors (\u03b3-aminobutyric acid). The mechanism that governed cotransport at the cell scale involved mechanical pushing and hydrodynamic interactions. Chemotaxis-mediated cotransport of bacterial degraders and its implications in pore accessibility opens new avenues for the enhancement of bacterial dispersion in porous media and the biodegradation of heterogeneously contaminated scenarios.", "keywords": ["Chemotactic Factors", "Pseudomonas putida", "Chemotaxis", "Bioaccessibility", "01 natural sciences", "Microbe-microbe cotransport", "Dimethylpolysiloxanes", "Polycyclic Aromatic Hydrocarbons", "Micrometer-sized pores", "Porosity", "Hexachlorocyclohexane", "gamma-Aminobutyric Acid", "Hitchhiking", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.2c03149"}, {"href": "https://doi.org/10.1021/acs.est.2c03149"}, {"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": "10.1021/acs.est.2c03149", "name": "item", "description": "10.1021/acs.est.2c03149", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.2c03149"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-09-14T00:00:00Z"}}, {"id": "10261/281764", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:24:37Z", "type": "Journal Article", "created": "2022-09-14", "title": "Chemotactic Bacteria Facilitate the Dispersion of Nonmotile Bacteria through Micrometer-Sized Pores in Engineered Porous Media", "description": "Recent research has demonstrated that chemotactic bacteria can disperse inside microsized pores while traveling toward favorable conditions. Microbe-microbe cotransport might enable nonmotile bacteria to be carried with motile partners to enhance their dispersion and reduce their deposition in porous systems. The aim of this study was to demonstrate the enhancement in the dispersion of nonmotile bacteria (Mycobacterium gilvum VM552, a polycyclic aromatic hydrocarbon-degrader, and Sphingobium sp. D4, a hexachlorocyclohexane-degrader, through micrometer-sized pores near the exclusion-cell-size limit, in the presence of motile Pseudomonas putida G7 cells. For this purpose, we used bioreactors equipped with two chambers that were separated with membrane filters with 3, 5, and 12 \u03bcm pore sizes and capillary polydimethylsiloxane (PDMS) microarrays (20 \u03bcm \u00d7 35 \u03bcm \u00d7 2.2 mm). The cotransport of nonmotile bacteria occurred exclusively in the presence of a chemoattractant concentration gradient, and therefore, a directed flow of motile cells. This cotransport was more intense in the presence of larger pores (12 \u03bcm) and strong chemoeffectors (\u03b3-aminobutyric acid). The mechanism that governed cotransport at the cell scale involved mechanical pushing and hydrodynamic interactions. Chemotaxis-mediated cotransport of bacterial degraders and its implications in pore accessibility opens new avenues for the enhancement of bacterial dispersion in porous media and the biodegradation of heterogeneously contaminated scenarios.", "keywords": ["Chemotactic Factors", "Pseudomonas putida", "Chemotaxis", "Bioaccessibility", "01 natural sciences", "Microbe-microbe cotransport", "Dimethylpolysiloxanes", "Polycyclic Aromatic Hydrocarbons", "Micrometer-sized pores", "Porosity", "Hexachlorocyclohexane", "gamma-Aminobutyric Acid", "Hitchhiking", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.2c03149"}, {"href": "https://doi.org/10261/281764"}, {"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": "10261/281764", "name": "item", "description": "10261/281764", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/281764"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-09-14T00:00:00Z"}}, {"id": "PMC9535858", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:28:25Z", "type": "Journal Article", "created": "2022-09-14", "title": "Chemotactic Bacteria Facilitate the Dispersion of Nonmotile Bacteria through Micrometer-Sized Pores in Engineered Porous Media", "description": "Recent research has demonstrated that chemotactic bacteria can disperse inside microsized pores while traveling toward favorable conditions. Microbe-microbe cotransport might enable nonmotile bacteria to be carried with motile partners to enhance their dispersion and reduce their deposition in porous systems. The aim of this study was to demonstrate the enhancement in the dispersion of nonmotile bacteria (Mycobacterium gilvum VM552, a polycyclic aromatic hydrocarbon-degrader, and Sphingobium sp. D4, a hexachlorocyclohexane-degrader, through micrometer-sized pores near the exclusion-cell-size limit, in the presence of motile Pseudomonas putida G7 cells. For this purpose, we used bioreactors equipped with two chambers that were separated with membrane filters with 3, 5, and 12 \u03bcm pore sizes and capillary polydimethylsiloxane (PDMS) microarrays (20 \u03bcm \u00d7 35 \u03bcm \u00d7 2.2 mm). The cotransport of nonmotile bacteria occurred exclusively in the presence of a chemoattractant concentration gradient, and therefore, a directed flow of motile cells. This cotransport was more intense in the presence of larger pores (12 \u03bcm) and strong chemoeffectors (\u03b3-aminobutyric acid). The mechanism that governed cotransport at the cell scale involved mechanical pushing and hydrodynamic interactions. Chemotaxis-mediated cotransport of bacterial degraders and its implications in pore accessibility opens new avenues for the enhancement of bacterial dispersion in porous media and the biodegradation of heterogeneously contaminated scenarios.", "keywords": ["Chemotactic Factors", "Pseudomonas putida", "Chemotaxis", "Bioaccessibility", "01 natural sciences", "Microbe-microbe cotransport", "Dimethylpolysiloxanes", "Polycyclic Aromatic Hydrocarbons", "Micrometer-sized pores", "Porosity", "Hexachlorocyclohexane", "gamma-Aminobutyric Acid", "Hitchhiking", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.2c03149"}, {"href": "https://doi.org/PMC9535858"}, {"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": "PMC9535858", "name": "item", "description": "PMC9535858", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/PMC9535858"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-09-14T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=bioaccessibility&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=bioaccessibility&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=bioaccessibility&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=bioaccessibility&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-07-26T21:01:05.933169Z"}