خيارات البحث
النتائج 1861 - 1870 من 62,595
Ambient ozone measurements in Norway 1975-1979 [Fertilizer industry, pulp and paper industry].
1981
Schjoldager J.
The role of natural organics in photochemical air pollution. Issues and research needs.
1981
Dimitriades B.
Comparative ozone dose response of gas exchange in a ponderosa pine stand exposed to long-term fumigations.
1981
Coyne P.I. | Bingham G.E.
A simple and inexpensive method for sampling 2,4-D [dichlorophenoxy acetic acid] and 2,4,5-T [trichlorophenoxy acetic acid] herbicides from air.
1978
Jackson J.W. | Thomas T.C.
Post-application volatillization of pesticides under field conditions.
1978
Taylor A.W.
The impact of gold smelter emissions on vegetation and soils of a sub-arctic forest-tundra transition ecosystem [Canada].
1978
Hocking D. | Kuchar P. | Plambeck J.A. | Smith R.A.
Fluoride cycling near a coastal emission source [Levels in plant tissues].
1978
Ares J.O.
Airborne studies of particles and gases from forest fires [Pollution].
1978
Radke L.F. | Stith J.L. | Hegg D.A. | Hobbs P.V.
Increased zinc and copper availability in organic waste amended soil potentially involving distinct release mechanisms النص الكامل
2016
Tella M. | Bravin M. | Thuriès L. | Cazevieille P. | Chevassus-Rosset C. | Collin B. | Chaurand P. | Legros S. | Doelsch E.
Increased zinc and copper availability in organic waste amended soil potentially involving distinct release mechanisms النص الكامل
2016
Tella M. | Bravin M. | Thuriès L. | Cazevieille P. | Chevassus-Rosset C. | Collin B. | Chaurand P. | Legros S. | Doelsch E.
This study aimed at determining the fate of trace elements (TE) following soil organic waste (OW) application. We used a unique combination of X-ray absorption spectroscopy analyses, to determine TE speciation, with incubation experiments for in situ monitoring of TE availability patterns over a time course with the technique of the diffusive gradients in thin films (DGT). We showed that copper (Cu) and zinc (Zn) availability were both increased in OW-amended soil, but their release was controlled by distinct mechanisms. Zn speciation in OW was found to be dominated by an inorganic species, i.e. Zn sorbed on Fe oxides. Zn desorption from Fe oxides could explain the increase in Zn availability in OW-amended soil. Cu speciation in OW was dominated by organic species. Cu release through the mineralization of organic carbon from OW was responsible for the increase in Cu availability. (Résumé d'auteur)
اظهر المزيد [+] اقل [-]Increased zinc and copper availability in organic waste amended soil potentially involving distinct release mechanisms النص الكامل
2016
Tella, Marie | Bravin, Matthieu N. | Thuriès, Laurent | Cazevieille, Patrick | Chevassus-Rosset, Claire | Collin, Blanche | Chaurand, Perrine | Legros, Samuel | Doelsch, Emmanuel
This study aimed at determining the fate of trace elements (TE) following soil organic waste (OW) application. We used a unique combination of X-ray absorption spectroscopy analyses, to determine TE speciation, with incubation experiments for in situ monitoring of TE availability patterns over a time course with the technique of the diffusive gradients in thin films (DGT). We showed that copper (Cu) and zinc (Zn) availability were both increased in OW-amended soil, but their release was controlled by distinct mechanisms. Zn speciation in OW was found to be dominated by an inorganic species, i.e. Zn sorbed on Fe oxides. Zn desorption from Fe oxides could explain the increase in Zn availability in OW-amended soil. Cu speciation in OW was dominated by organic species. Cu release through the mineralization of organic carbon from OW was responsible for the increase in Cu availability.
اظهر المزيد [+] اقل [-]Increased zinc and copper availability in organic waste amended soil potentially involving distinct release mechanisms النص الكامل
2016
Tella, Marie | Bravin, Matthieu N. | Thuriès, Laurent | Cazevieille, Patrick | Chevassus-Rosset, Claire | Collin, Blanche | Chaurand, Perrine | Legros, Samuel | Doelsch, Emmanuel | Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) ; Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) | Recyclage et risque (UPR Recyclage et risque) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)
International audience | This study aimed at determining the fate of trace elements (TE) following soil organic waste (OW) application. We used a unique combination of X-ray absorption spectroscopy analyses, to determine TE speciation, with incubation experiments for in situ monitoring of TE availability patterns over a time course with the technique of the diffusive gradients in thin films (DGT). We showed that copper (Cu) and zinc (Zn) availability were both increased in OW-amended soil, but their release was controlled by distinct mechanisms. Zn speciation in OW was found to be dominated by an inorganic species, i.e. Zn sorbed on Fe oxides. Zn desorption from Fe oxides could explain the increase in Zn availability in OW amended soil. Cu speciation in OW was dominated by organic species. Cu release through the mineralization of organic carbon from OW was responsible for the increase in Cu availability. (C) 2016 Elsevier Ltd. All rights reserved.
اظهر المزيد [+] اقل [-]Developmental assays using invasive cane toads, Rhinella marina, reveal safety concerns of a common formulation of the rice herbicide, butachlor النص الكامل
2021
Shuman-Goodier, Molly E. | Singleton, Grant R. | Forsman, Anna M. | Hines, Shyann | Christodoulides, Nicholas | Daniels, Kevin D. | Propper, Catherine R.
Developmental assays using invasive cane toads, Rhinella marina, reveal safety concerns of a common formulation of the rice herbicide, butachlor النص الكامل
2021
Shuman-Goodier, Molly E. | Singleton, Grant R. | Forsman, Anna M. | Hines, Shyann | Christodoulides, Nicholas | Daniels, Kevin D. | Propper, Catherine R.
Developmental assays using invasive cane toads, Rhinella marina, reveal safety concerns of a common formulation of the rice herbicide, butachlor النص الكامل
2021
Shuman-Goodier, Molly E. | Singleton, Grant R. | Forsman, Anna M. | Hines, Shyann | Christodoulides, Nicholas | Daniels, Kevin D. | Propper, Catherine R.
Identifying the adverse impacts of pesticide exposure is essential to guide regulations that are protective of wildlife and human health. Within rice ecosystems, amphibians are valuable indicators because pesticide applications coincide with sensitive reproductive and developmental life stages. We conducted two experiments using wild cane toads (Rhinella marina) to test 1) whether environmentally relevant exposure to a commercial formulation of butachlor, an acetanilide herbicide used extensively in rice, affects amphibian development and 2) whether cane toad tadpoles are capable of acclimatizing to sub-lethal exposure. First, we exposed wild cane toads to 0.002, 0.02, or 0.2 mg/L of butachlor (Machete EC), during distinct development stages (as eggs and hatchlings, as tadpoles, or continuously) for 12 days. Next, we exposed a subset of animals from the first experiment to a second, lethal concentration and examined survivorship. We found that cane toads exposed to butachlor developed slower and weighed less than controls, and that development of the thyroid gland was affected: exposed individuals had smaller thyroid glands and thyrocyte cells, and more individual follicles. Analyses of the transcriptome revealed that butachlor exposure resulted in downregulation of transcripts related to metabolic processes, anatomic structure development, immune system function, and response to stress. Last, we observed evidence of acclimatization, where animals exposed to butachlor early in life performed better than naïve animals during a second exposure. Our findings indicate that the commercial formulation of butachlor, Machete EC, causes thyroid endocrine disruption in vertebrates, and suggest that exposure in lowland irrigated rice fields presents a concern for wildlife and human health. Furthermore, we establish that developmental assays with cane toads can be used to screen for adverse effects of pesticides in rice fields.
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