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[PMID]:28486182
[Au] Autor:Qian Y; Matsumoto H; Liu X; Li S; Liang X; Liu Y; Zhu G; Wang M
[Ad] Endereço:Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China.
[Ti] Título:Dissipation, occurrence and risk assessment of a phenylurea herbicide tebuthiuron in sugarcane and aquatic ecosystems in South China.
[So] Source:Environ Pollut;227:389-396, 2017 Aug.
[Is] ISSN:1873-6424
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this study, a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method coupled with UPLC-QqQ-MS/MS analysis was developed to detect tebuthiuron in sugarcane fields and the surrounding aquatic ecosystems. Methodological validation showed the method developed was of favorable sensitivity, reproducibility and accuracy. For assessment of its dietary and ecological risks, dissipation and occurrence of tebuthiuron in situ were further investigated through a supervised field trial and an aquatic environment monitoring carried out in six dominant sugarcane production regions in South China. After application at the range of recommended dose, tebuthiuron dominantly distributed in soil, and then dissipated in accordance with the first-order rate model with the half-lives of 12.2-21.5 d. At pre-harvest intervals (PHI), occurrence of tebuthiuron was found to be 0.718-1.366 mg/kg and 0.016-0.034 mg/kg, in sugarcane and soil, respectively. The supervised trials median residue (STMR) of tebuthiuron in sugarcane was thus 0.024 mg/kg and the dietary Risk Quotient (RQ ) was accordingly calculated as 2.34 × 10 , indicating safety on long-term consumption of sugarcane with tebuthiuron residues. Yet high risks of tebuthiuron towards soil ecosystems was noticed as it possessed maximum ecological Risk Quotient (RQ ) at 1.97 to earthworms. In sugarcane field-surrounding aquatic environment, distribution of tebuthiuron was found to range from 0.007 mg/L to 0.022 mg/L, leading to high risk towards the aquatic ecosystem due to the maximum RQ at 440 to algae, irrespective of its low risks to invertebrate and fish. Taken together, our approach serve as an effective tool for monitoring residual tebuthiuron environmentally and also advance in-depth understanding of dietary and ecological risks posed by the phenylurea herbicide.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Herbicidas/análise
Compostos de Metilureia/análise
Resíduos de Praguicidas/análise
Saccharum/química
[Mh] Termos MeSH secundário: China
Ecossistema
Meia-Vida
Reprodutibilidade dos Testes
Medição de Risco
Solo/química
Poluentes do Solo/análise
Espectrometria de Massas em Tandem/métodos
Poluentes Químicos da Água/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Methylurea Compounds); 0 (Pesticide Residues); 0 (Soil); 0 (Soil Pollutants); 0 (Water Pollutants, Chemical); E5OX6GM11E (tebuthiuron)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170510
[St] Status:MEDLINE


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[PMID]:28318436
[Au] Autor:Kobayashi S; Fujii S; Koga A; Wakai S; Matubayasi N; Sambongi Y
[Ad] Endereço:a Graduate School of Biosphere Science , Hiroshima University , Higashi-Hiroshima , Japan.
[Ti] Título:Pseudomonas aeruginosa cytochrome c denaturation by five systematic urea derivatives that differ in the alkyl chain length.
[So] Source:Biosci Biotechnol Biochem;81(7):1274-1278, 2017 Jul.
[Is] ISSN:1347-6947
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Reversible denaturation of Pseudomonas aeruginosa cytochrome c (PAc ) could be followed using five systematic urea derivatives that differ in the alkyl chain length, i.e. urea, N-methylurea (MU), N-ethylurea (EU), N-propylurea (PU), and N-butylurea (BU). The BU concentration was the lowest required for the PAc denaturation, those of PU, EU, MU, and urea being gradually higher. Furthermore, the accessible surface area difference upon PAc denaturation caused by BU was found to be the highest, those by PU, EU, MU, and urea being gradually lower. These findings indicate that urea derivatives with longer alkyl chains are stronger denaturants. In this study, as many as five systematic urea derivatives could be applied for the reversible denaturation of a single protein, PAc , for the first time, and the effects of the alkyl chain length on protein denaturation were systematically verified by means of thermodynamic parameters.
[Mh] Termos MeSH primário: Proteínas de Bactérias/química
Grupo dos Citocromos c/química
Compostos de Metilureia/química
Pseudomonas aeruginosa/química
Ureia/análogos & derivados
Ureia/química
[Mh] Termos MeSH secundário: Proteínas de Bactérias/isolamento & purificação
Grupo dos Citocromos c/isolamento & purificação
Escherichia coli/genética
Escherichia coli/metabolismo
Expressão Gênica
Compostos de Metilureia/farmacologia
Desnaturação Proteica/efeitos dos fármacos
Pseudomonas aeruginosa/enzimologia
Proteínas Recombinantes/química
Proteínas Recombinantes/isolamento & purificação
Relação Estrutura-Atividade
Termodinâmica
Ureia/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Bacterial Proteins); 0 (Cytochrome c Group); 0 (Methylurea Compounds); 0 (Recombinant Proteins); 0PK51J4AV7 (propylurea); 7K14B03X18 (ethylurea); 8W8T17847W (Urea); 9048-77-5 (cytochrome C(551)); 9CPL5NR15K (butylurea); VZ89YBW3P8 (methylurea)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170321
[St] Status:MEDLINE
[do] DOI:10.1080/09168451.2017.1303361


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[PMID]:28059513
[Au] Autor:Hulshof TG; Rutherfurd SM; Sforza S; Bikker P; van der Poel AF; Hendriks WH
[Ad] Endereço:Wageningen University & Research , Wageningen Livestock Research, P.O. Box 338, 6700 AH Wageningen, The Netherlands.
[Ti] Título:O-Methylisourea Can React with the α-Amino Group of Lysine: Implications for the Analysis of Reactive Lysine.
[So] Source:J Agric Food Chem;65(4):964-972, 2017 Feb 01.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The specificity of O-methylisourea (OMIU) to bind to the ε-amino group of Lys, an important supposition for the OMIU-reactive Lys analysis of foods, feeds, ingredients, and digesta, was investigated. Crystalline l-Lys incubated under standard conditions with OMIU resulted in low homoarginine recoveries. The reaction of OMIU with the α-amino group of Lys was confirmed by MS analysis, with double derivatized Lys being identified. None of the changes in reaction conditions (OMIU pH, OMIU to Lys ratio, and reaction time) with crystalline l-Lys resulted in 100% recovery of homoarginine. The average free Lys content in ileal digesta of growing pigs and broilers was found to be 13% of total Lys, which could result in a significant underestimation of the reactive Lys content. The reaction of OMIU with α-amino groups may necessitate analysis of free Lys to accurately quantify reactive lysine in samples containing a large proportion of Lys with a free α-amino group.
[Mh] Termos MeSH primário: Galinhas/metabolismo
Lisina/química
Compostos de Metilureia/química
Suínos/metabolismo
[Mh] Termos MeSH secundário: Ração Animal/análise
Animais
Digestão
Homoarginina/química
Homoarginina/metabolismo
Lisina/metabolismo
Compostos de Metilureia/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Methylurea Compounds); 156-86-5 (Homoarginine); 2440-60-0 (O-methylisourea); K3Z4F929H6 (Lysine)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170428
[Lr] Data última revisão:
170428
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170107
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.6b03096


  4 / 536 MEDLINE  
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[PMID]:27427397
[Au] Autor:Patil-Sen Y; Dennison SR; Snape TJ
[Ad] Endereço:School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston PR1 2HE, UK.
[Ti] Título:Functional foldamers that target bacterial membranes: The effect of charge, amphiphilicity and conformation.
[So] Source:Bioorg Med Chem;24(18):4241-4245, 2016 Sep 15.
[Is] ISSN:1464-3391
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:By varying the molecular charge, shape and amphiphilicity of a series of conformationally distinct diarylureas it is possible to control the levels of phospholipid membrane lysis using membranes composed of bacterial lipid extracts. From the data obtained, it appears as though the lysis activity observed is not due to charge, conformation or amphiphilicity in isolation, but that surface aggregation, H-bonding and other factors may also play a part. The work provides evidence that this class of foldamer possesses potential for optimisation into new antibacterial agents.
[Mh] Termos MeSH primário: Antibacterianos/farmacologia
Membrana Celular/efeitos dos fármacos
Compostos de Metilureia/farmacologia
Compostos de Fenilureia/farmacologia
Tensoativos/farmacologia
[Mh] Termos MeSH secundário: Antibacterianos/síntese química
Antibacterianos/química
Membrana Celular/metabolismo
Permeabilidade da Membrana Celular
Escherichia coli/efeitos dos fármacos
Compostos de Metilureia/síntese química
Compostos de Metilureia/química
Conformação Molecular
Estrutura Molecular
Compostos de Fenilureia/síntese química
Compostos de Fenilureia/química
Polimixina B/farmacologia
Staphylococcus aureus/efeitos dos fármacos
Tensoativos/síntese química
Tensoativos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (Methylurea Compounds); 0 (Phenylurea Compounds); 0 (Surface-Active Agents); 1404-26-8 (Polymyxin B)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170812
[Lr] Data última revisão:
170812
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160719
[St] Status:MEDLINE


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[PMID]:27372414
[Au] Autor:Donato P; Rigano F; Cacciola F; Schure M; Farnetti S; Russo M; Dugo P; Mondello L
[Ad] Endereço:Dipartimento di "Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali", University of Messina, Viale Consolare Valeria, 98165 Messina, Italy.
[Ti] Título:Comprehensive two-dimensional liquid chromatography-tandem mass spectrometry for the simultaneous determination of wine polyphenols and target contaminants.
[So] Source:J Chromatogr A;1458:54-62, 2016 Aug 05.
[Is] ISSN:1873-3778
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A novel system for comprehensive two-dimensional liquid chromatography coupled to a triple quadrupole mass spectrometer is described for the analysis of wine components. The first dimension consisted of a 250-mm microbore cyano column utilizing 5µm diameter particles, interfaced to a 50-mm superficially-porous particle C18 column with 2.7µm diameter particles. Both columns were operated under reversed-phase conditions. Correlation between the two chromatographic separation modes was decreased by designing a 60-s shift gradient program in the second dimension, and the increase in orthogonality was evaluated quantitatively utilizing a number of orthogonality metrics. The system was employed for the analysis of a red wine sample, without preliminary clean-up procedures, and a total of 43 polyphenols were separated and identified. Comparison with a one-dimensional LC system showed a large increase in the number of identified components with the two-dimensional system. Optimized multiple reaction monitoring experiments allowed for the determination of trans-resveratrol, which is one of the most active antioxidant component of wine, and for monuron, a plant protection product (herbicide) of interest to regulatory agencies. The estimated limits of detection and of quantification were 0.3µgL(-1) and 1µgL(-1), respectively, well below the minimum detection limit (10µgL(-1)) set by current regulation.
[Mh] Termos MeSH primário: Cromatografia Líquida/métodos
Polifenóis/análise
Espectrometria de Massas em Tandem/métodos
Vinho/análise
[Mh] Termos MeSH secundário: Antioxidantes/análise
Cromatografia Líquida/instrumentação
Contaminação de Alimentos/análise
Herbicidas/análise
Limite de Detecção
Compostos de Metilureia/análise
Polifenóis/química
Estilbenos/análise
Espectrometria de Massas em Tandem/instrumentação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Antioxidants); 0 (Herbicides); 0 (Methylurea Compounds); 0 (Polyphenols); 0 (Stilbenes); I99GAK5X1D (monuron); Q369O8926L (resveratrol)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160704
[St] Status:MEDLINE


  6 / 536 MEDLINE  
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[PMID]:27206752
[Au] Autor:Federico C; Palmieri C; Pappalardo AM; Ferrito V; Pappalardo M; Librando V; Saccone S
[Ad] Endereço:Department of Biological, Geological and Environmental Sciences, Section of Animal Biology, University of Catania, Catania, Italy.
[Ti] Título:Mutagenic properties of linuron and chlorbromuron evaluated by means of cytogenetic biomarkers in mammalian cell lines.
[So] Source:Environ Sci Pollut Res Int;23(17):17018-25, 2016 Sep.
[Is] ISSN:1614-7499
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Agricultural practices are usually supported by several chemical substances, such as herbicides. Linuron and chlorbromuron are phenylurea herbicides largely used to protect crops from weeds, blocking photosynthesis by inhibition of the photosystem II complex. The former, also commercially known as lorox or afalon, is selectively used to protect bean and French bean plants, fennels, and celeriacs; the second, commercially known as maloran, is selectively used for carrots, peas, potatoes, soy sprouts, and sunflowers. Considering the widespread use of herbicides and, more generally, pesticides, it is important to clarify their involvement on human health, one of them concerning the possible direct or indirect effect on the genome of exposed populations. Here, we show that these herbicides are endowed by mutagenic properties, as demonstrated by an increased number of chromosomal aberrations (CAs) in two exposed Chinese hamster cell lines derived from ovary and epithelial liver, respectively. This was also confirmed by sister chromatid exchange (SCE) and micronucleus (MN) assays. Our present and previously obtained data clearly indicate that phenylurea herbicides must be used with great caution, especially for agricultural workers who use large amounts of herbicides during their work, and particular attention should be given to residues of these herbicides and their involvement in environmental pollution.
[Mh] Termos MeSH primário: Biomarcadores/análise
Aberrações Cromossômicas/efeitos dos fármacos
Herbicidas/toxicidade
Linurona/toxicidade
Compostos de Metilureia/toxicidade
Mutagênicos/toxicidade
Compostos de Fenilureia/toxicidade
[Mh] Termos MeSH secundário: Animais
Células CHO
Linhagem Celular
Cricetinae
Cricetulus
Feminino
Testes para Micronúcleos
Troca de Cromátide Irmã/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (Herbicides); 0 (Methylurea Compounds); 0 (Mutagens); 0 (Phenylurea Compounds); 01XP1SU59O (Linuron); 2X2DQC5EHG (chlorbromuron)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171121
[Lr] Data última revisão:
171121
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160522
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-016-6867-y


  7 / 536 MEDLINE  
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[PMID]:27037885
[Au] Autor:Wood RJ; Mitrovic SM; Lim RP; Kefford BJ
[Ad] Endereço:School of Life Sciences, Applied Ecology Team, University of Technology Sydney, PO Box 123, NSW 2007, Australia. Electronic address: Wood.Rebecca.Jane@gmail.com.
[Ti] Título:How benthic diatoms within natural communities respond to eight common herbicides with different modes of action.
[So] Source:Sci Total Environ;557-558:636-43, 2016 07 01.
[Is] ISSN:1879-1026
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Herbicides are common pollutants of rivers in agricultural regions. These contaminants include various types of chemicals with different modes of toxic action. Herbicides can have toxic effects on freshwater benthic diatoms, the base of the aquatic food web. We examined the effects of (non-mixture) herbicide exposure to the health of diatoms for eight common herbicides with three different modes of action; the photosystem II (PSII) inhibitors: atrazine, simazine, hexazinone, tebuthiuron and diuron; two auxinic herbicides: MCPA and 2,4-D; and the EPSP synthase inhibitor: glyphosate. Benthic diatoms within riverine communities were exposed to each herbicide in rapid toxicity tests at concentrations of 50, 200 and 500µgL(-1). The most sensitive taxa were Gomphonema spp. and Encyonema gracilis. Navicula cryptotenella was the most tolerant to herbicide exposure. There was no significant effect of the different herbicide modes of action at the community level. Herbicide mode of action did not alter which taxa were most sensitive within the community and sensitivity rankings of the dominant diatom taxa were similar for each of the eight herbicides. The consistency of the results between herbicides suggests that freshwater benthic diatoms may be suitable in situ indicators for detecting the toxicity of herbicides with differing modes of action.
[Mh] Termos MeSH primário: Diatomáceas/fisiologia
Herbicidas/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Ácido 2,4-Diclorofenoxiacético/toxicidade
Atrazina/toxicidade
Compostos de Metilureia/toxicidade
Simazina/toxicidade
Testes de Toxicidade
Triazinas/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Herbicides); 0 (Methylurea Compounds); 0 (Triazines); 0 (Water Pollutants, Chemical); 2577AQ9262 (2,4-Dichlorophenoxyacetic Acid); E5OX6GM11E (tebuthiuron); QJA9M5H4IM (Atrazine); SG0C34SMY3 (Simazine); Y51727MR1Y (hexazinone)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170612
[Lr] Data última revisão:
170612
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160403
[St] Status:MEDLINE


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[PMID]:26881916
[Au] Autor:Thornton CM; Elledge AE
[Ad] Endereço:Department of Natural Resources and Mines , P.O. Box 1762, Rockhampton, Queensland 4700, Australia.
[Ti] Título:Tebuthiuron Movement via Leaching and Runoff from Grazed Vertisol and Alfisol Soils in the Brigalow Belt Bioregion of Central Queensland, Australia.
[So] Source:J Agric Food Chem;64(20):3949-59, 2016 May 25.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Tebuthiuron is one of five priority herbicides identified as a water pollutant entering the Great Barrier Reef. A review of tebuthiuron research in Australia found 13 papers, 6 of which focused on water quality at the basin scale (>10,000 km(2)) with little focus on process understanding. This study examined the movement of tebuthiuron in soil and runoff at the plot (1.7 m(2)) and small catchment (12.7 ha) scales. The greatest concentration and mass in soil occurred from 0 to 0.05 m depth 30-57 days after application. Concentrations at all depths tended to decrease after 55-104 days. Runoff at the small catchment scale contained high concentrations of tebuthiuron (average = 103 µg/L) 100 days after application, being 0.05% of the amount applied. Tebuthiuron concentrations in runoff declined over time with the majority of the chemical in the dissolved phase.
[Mh] Termos MeSH primário: Herbicidas/química
Compostos de Metilureia/química
Poluentes do Solo/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Monitoramento Ambiental
Cinética
Queensland
Solo/química
Solubilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Methylurea Compounds); 0 (Soil); 0 (Soil Pollutants); 0 (Water Pollutants, Chemical); E5OX6GM11E (tebuthiuron)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160217
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.5b05393


  9 / 536 MEDLINE  
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[PMID]:26764571
[Au] Autor:Kovács K; Farkas J; Veréb G; Arany E; Simon G; Schrantz K; Dombi A; Hernádi K; Alapi T
[Ad] Endereço:a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
[Ti] Título:Comparison of various advanced oxidation processes for the degradation of phenylurea herbicides.
[So] Source:J Environ Sci Health B;51(4):205-14, 2016.
[Is] ISSN:1532-4109
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Various types of advanced oxidation processes (AOPs), such as UV photolysis, ozonation, heterogeneous photocatalysis and their combinations were comparatively examined at the same energy input in a home-made reactor. The oxidative transformations of the phenylurea herbicides fenuron, monuron and diuron were investigated. The initial rates of transformation demonstrated that UV photolysis was highly efficient in the cases of diuron and monuron. Ozonation proved to be much more effective in the transformation of fenuron than in those of the chlorine containing monuron and diuron. In heterogeneous photocatalysis, the rate of decomposition decreased with increase of the number of chlorine atoms in the target molecule. Addition of ozone to UV-irradiated solutions and/or TiO2-containing suspensions markedly increased the initial rates of degradation. Dehalogenation of monuron and diuron showed that each of these procedures is suitable for the simultaneous removal of chlorinated pesticides and their chlorinated intermediates. Heterogeneous photocatalysis was found to be effective in the mineralization.
[Mh] Termos MeSH primário: Herbicidas/química
Poluentes Químicos da Água/química
[Mh] Termos MeSH secundário: Diurona/química
Compostos de Metilureia/química
Oxirredução
Ozônio/química
Compostos de Fenilureia/química
Fotólise
Raios Ultravioleta
Purificação da Água/métodos
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Herbicides); 0 (Methylurea Compounds); 0 (Phenylurea Compounds); 0 (Water Pollutants, Chemical); 66H7ZZK23N (Ozone); 9I3SDS92WY (Diuron); I99GAK5X1D (monuron); O7L040435W (fenuron)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:160128
[Lr] Data última revisão:
160128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160115
[St] Status:MEDLINE
[do] DOI:10.1080/03601234.2015.1120597


  10 / 536 MEDLINE  
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[PMID]:26731582
[Au] Autor:Toniêto TA; de Pierri L; Tornisielo VL; Regitano JB
[Ad] Endereço:Department of Soil Science, University of São Paulo (USP/ESALQ) , Av. Pádua Dias 11, 13418-260 Piracicaba (SP), Brazil.
[Ti] Título:Fate of Tebuthiuron and Hexazinone in Green-Cane Harvesting System.
[So] Source:J Agric Food Chem;64(20):3960-6, 2016 May 25.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In Brazil, fire prior to sugar cane harvesting has to be phased out by 2017, but it has already been phased out in up to 85-90% of the cropped area. The new system is called green cane and has entirely changed weed management practices. The main goal of this study was to evaluate the effects of the straw presence as well as humic acid (HA), formulation, soil type, and aging on the sorption and leaching of (14)C-tebuthiuron and hexazinone. Both herbicides presented low sorption for all treatments (Kd,app ≤ 3.25 L kg(-1)), but it was higher for tebuthiuron in the clayer soil (LVd). Straw and aging only slightly enhanced sorption. The HA effects were not clear. Sorption was mostly affected by herbicide and soil type. Straw may promote physical trapping (∼40% of applied amount), which cannot be accessed by "batch" sorption (∼15% of the applied amount is sorbed), attenuating leaching of highly mobile herbicides in green-cane systems. To properly assess leaching through straw residues under laboratory condition, rainfall distribution is very important.
[Mh] Termos MeSH primário: Herbicidas/química
Compostos de Metilureia/química
Caules de Planta/química
Poluentes do Solo/química
Triazinas/química
[Mh] Termos MeSH secundário: Adsorção
Brasil
Monitoramento Ambiental
Substâncias Húmicas/análise
Cinética
Caules de Planta/crescimento & desenvolvimento
Saccharum/química
Saccharum/crescimento & desenvolvimento
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Herbicides); 0 (Humic Substances); 0 (Methylurea Compounds); 0 (Soil); 0 (Soil Pollutants); 0 (Triazines); E5OX6GM11E (tebuthiuron); Y51727MR1Y (hexazinone)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160106
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.5b04665



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