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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
22/12/2008 |
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Data da última atualização: |
23/11/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
DORES, E. F. G. C.; SPADOTTO, C. A.; WEBER, O. L. S.; CARBO, L.; VECCHIATO, A. B.; PINTO, A. A. |
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Afiliação: |
Eliana F. G. C.Dores, UFMT; CLAUDIO APARECIDO SPADOTTO, SGTE; Oscarlina L. S.Weber, UFMT; Leandro Carbo, UNESP-Campus de Araraquara; Antonio B. Vecchiato, UFMT; Alicio A. Pinto, UFMT. |
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Título: |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Water, Air and Soil Pollution, v. 197, p. 175?183, 2009. |
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Idioma: |
Inglês |
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Conteúdo: |
The environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. K oc of metolachlor varied from 179 to 264 mL g-1 in the soil horizons. K oc of diuron in the Ap horizon was 917 mL g-1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L-1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L-1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron. MenosThe environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. K oc of metolachlor varied from 179 to 264 mL g-1 in the soil horizons. K oc of diuron in the Ap horizon was 917 mL g-1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L-1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L-1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the imp... Mostrar Tudo |
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Thesagro: |
Agrotóxico; Água; Poluição Ambiental. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/150407/1/2008CP-12.pdf
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Marc: |
LEADER 02263naa a2200217 a 4500
001 1015592
005 2016-11-23
008 2008 bl uuuu u00u1 u #d
100 1 $aDORES, E. F. G. C.
245 $aEnvironmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil.$h[electronic resource]
260 $c2008
520 $aThe environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. K oc of metolachlor varied from 179 to 264 mL g-1 in the soil horizons. K oc of diuron in the Ap horizon was 917 mL g-1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L-1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L-1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron.
650 $aAgrotóxico
650 $aÁgua
650 $aPoluição Ambiental
700 1 $aSPADOTTO, C. A.
700 1 $aWEBER, O. L. S.
700 1 $aCARBO, L.
700 1 $aVECCHIATO, A. B.
700 1 $aPINTO, A. A.
773 $tWater, Air and Soil Pollution$gv. 197, p. 175?183, 2009.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
30/12/2016 |
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Data da última atualização: |
29/12/2017 |
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Autoria: |
SEPÚLVEDA, R V.; VALENTE, F. L.; REIS, E. C. C.; ARAÚJO, F. R.; ELEOTÉRIO R. B.; QUEIROZ, P. V. S.; BORGES, A. P. B. |
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Afiliação: |
RODRIGO V. SEPÚLVEDA, UFV; FABRÍCIO L. VALENTE, UFV; EMILY C. C. REIS, UFV; FABIANA R ARAÚJO, UFV; RENATO B. ELEOTÉRIO, UFV; PAULO V. S. QUEIROZ, UFV; ANDRÉA P. B. BORGES, UFV. |
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Título: |
Bacterial cellulose and bacterial cellulose/polycaprolactone composites as tissue substitutes in rabbits' cornea. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Pesquisa Veterinária Brasileira, Rio de Janeiro, v. 36, n. 10, p. 986-992, out. 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
In order to test the performance of bacterial cellulose/polycaprolactone composite (BC/PCL) and pure bacterial cellulose (BC) as tissue substitutes in rabbits? cornea, a superficial ulcer containing 5mm in diameter and 0.2mm deep was made in the right cornea of 36 rabbits, then a interlayer pocket was created from the basis of this ulcer. Twelve rabbits received BC/PCL membrane and 12 were treated with BC membranes, both membranes with 8mm in diameter. The remaining rabbits received no membrane constituting the control group. The animals were clinically followed up for 45 days. Three animals of each group were euthanized at three, seven, 21, and 45 days after implantation for histological examination of the cornea along with the implant. Clinical observation revealed signs of moderate inflammatory process, decreasing from day 20th in the implanted groups. Histology showed absence of epithelium on the membranes, fibroplasia close to the implants, lymph inflammatory infiltrate with giant cells, collagen disorganization, with a predominance of immature collagen fibers in both groups with implants. Although inflammatory response is acceptable, the membranes used does not satisfactorily played the role of tissue substitute for the cornea during the study period. |
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Palavras-Chave: |
Bacterial cellulose; Bacterial cellulose/polycaprolactone composite; Biomaterial; Celulose bacteriana; Corneal ulcer; Engenharia de tecido; Modelo animal; Tissue substitutes; Úlcera de córnea. |
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Thesagro: |
Coelho. |
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Thesaurus NAL: |
Animal models; Biocompatible materials; Cornea; Gluconacetobacter xylinus; Rabbits; Tissue engineering. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152581/1/Bacterial-cellulose-and-bacterial.pdf
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Marc: |
LEADER 02466naa a2200385 a 4500
001 2059677
005 2017-12-29
008 2016 bl uuuu u00u1 u #d
100 1 $aSEPÚLVEDA, R V.
245 $aBacterial cellulose and bacterial cellulose/polycaprolactone composites as tissue substitutes in rabbits' cornea.$h[electronic resource]
260 $c2016
520 $aIn order to test the performance of bacterial cellulose/polycaprolactone composite (BC/PCL) and pure bacterial cellulose (BC) as tissue substitutes in rabbits? cornea, a superficial ulcer containing 5mm in diameter and 0.2mm deep was made in the right cornea of 36 rabbits, then a interlayer pocket was created from the basis of this ulcer. Twelve rabbits received BC/PCL membrane and 12 were treated with BC membranes, both membranes with 8mm in diameter. The remaining rabbits received no membrane constituting the control group. The animals were clinically followed up for 45 days. Three animals of each group were euthanized at three, seven, 21, and 45 days after implantation for histological examination of the cornea along with the implant. Clinical observation revealed signs of moderate inflammatory process, decreasing from day 20th in the implanted groups. Histology showed absence of epithelium on the membranes, fibroplasia close to the implants, lymph inflammatory infiltrate with giant cells, collagen disorganization, with a predominance of immature collagen fibers in both groups with implants. Although inflammatory response is acceptable, the membranes used does not satisfactorily played the role of tissue substitute for the cornea during the study period.
650 $aAnimal models
650 $aBiocompatible materials
650 $aCornea
650 $aGluconacetobacter xylinus
650 $aRabbits
650 $aTissue engineering
650 $aCoelho
653 $aBacterial cellulose
653 $aBacterial cellulose/polycaprolactone composite
653 $aBiomaterial
653 $aCelulose bacteriana
653 $aCorneal ulcer
653 $aEngenharia de tecido
653 $aModelo animal
653 $aTissue substitutes
653 $aÚlcera de córnea
700 1 $aVALENTE, F. L.
700 1 $aREIS, E. C. C.
700 1 $aARAÚJO, F. R.
700 1 $aELEOTÉRIO R. B.
700 1 $aQUEIROZ, P. V. S.
700 1 $aBORGES, A. P. B.
773 $tPesquisa Veterinária Brasileira, Rio de Janeiro$gv. 36, n. 10, p. 986-992, out. 2016.
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Embrapa Unidades Centrais (AI-SEDE) |
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