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[PMID]:28386885
[Au] Autor:Yin G; Athanassiadis I; Bergman Å; Zhou Y; Qiu Y; Asplund L
[Ad] Endereço:Department of Environmental Science and Analytical Chemistry, Stockholm University, SE-10691, Stockholm, Sweden.
[Ti] Título:A refined method for analysis of 4,4'-dicofol and 4,4'-dichlorobenzophenone.
[So] Source:Environ Sci Pollut Res Int;24(15):13307-13314, 2017 May.
[Is] ISSN:1614-7499
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The acaricide, dicofol, is a well-known pesticide and partly a substitute for dichlorodiphenyltrichloroethane (DDT). Only few reports on environmental occurrence and concentrations have been reported calling for improvements. Hence, an analytical method was further developed for dicofol and dichlorobenzophenone (DCBP) to enable assessments of their environmental occurrence. Concentrated sulfuric acid was used to remove lipids and to separate dicofol from DCBP. On-column injection was used as an alternative to splitless injection to protect dicofol from thermal decomposition. By the method presented herein, it is possible to quantify dicofol and DCBP in the same samples. Arctic cod (Gadus morhua) were spiked at two dose levels and the recoveries were determined. The mean recovery for dicofol was 65% at the low dose (1 ng) and 77% at the high dose (10 ng). The mean recovery for DCBP was 99% at the low dose (9.2 ng) and 146% at the high dose (46 ng). The method may be further improved by use of another lipid removal method, e.g., gel permeation chromatography. The method implies a step forward in dicofol environmental assessments.
[Mh] Termos MeSH primário: Dicofol
Inseticidas
[Mh] Termos MeSH secundário: Animais
Benzofenonas
DDT
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Benzophenones); 0 (Insecticides); 3MTL0YC2Q5 (4,4'-dichlorobenzophenone); CIW5S16655 (DDT); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170605
[Lr] Data última revisão:
170605
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170408
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-017-8956-y


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[PMID]:28254712
[Au] Autor:Zeng F; Yang D; Xing X; Qi S
[Ad] Endereço:State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China; School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China.
[Ti] Título:Evaluation of Bayesian approaches to identify DDT source contributions to soils in Southeast China.
[So] Source:Chemosphere;176:32-38, 2017 Jun.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Dicofol application may be an important source to elevate the dichlorodiphenyltrichloroethane (DDT) residues to soils in Fujian, Southeast China, after the technical DDT was banned, which left DDT residues from the historical application. The DDT residues varied geographically, corresponding to the varied potential sources of DDT. In this study, a novel approach based on the Bayesian method (BM) was developed to identify the source contributions of DDT to soils, composed with both historical DDT and dicofol. The Naive Bayesian classifier was used basing on the subset of the samples, which were determined by chemical analysis independent of the Bayesian approach. The results show that BM (95%) was higher than that using the ratio of o, p'-/p, p'-DDT (84%) to identify DDT source contributions. High detection rate (97%) of dicofol (p, p'-OH-DDT) was observed in the subset, showing dicofol application influenced the DDX levels in soils in Fujian. However, the contribution from historical technical DDT source was greater than that from dicofol in Fujian, indicating historical technical DDT was still an important pollution source to soils. In addition, both the DDX (DDT isomers and derivatives) level and dicofol contribution in non-agricultural soils were higher than other agricultural land uses, especially in hilly regions, the potential cause may be the atmospheric transport of dicofol type DDT, after spraying during daytime, or regional difference on production and application.
[Mh] Termos MeSH primário: DDT/análise
Dicofol/análise
Monitoramento Ambiental/métodos
Poluentes do Solo/análise
Solo/química
[Mh] Termos MeSH secundário: Agricultura
Teorema de Bayes
China
DDT/química
Dicofol/química
Monitoramento Ambiental/estatística & dados numéricos
Isomerismo
Poluentes do Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Soil); 0 (Soil Pollutants); CIW5S16655 (DDT); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170304
[St] Status:MEDLINE


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[PMID]:26694483
[Au] Autor:Feng J; Hu P; Zhang F; Sun J
[Ad] Endereço:School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, 453007, Henan, People's Republic of China. fengjinglan@163.com.
[Ti] Título:HCHs and DDTs in Yellow River of Henan section-a typical agricultural area in China: levels, distributions and risks.
[So] Source:Environ Geochem Health;38(6):1241-1253, 2016 Dec.
[Is] ISSN:1573-2983
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The levels, potential sources and ecological risks of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) in Yellow River of Henan section, a typical agricultural area in China, were investigated. Surface water samples and suspended particulate matters (SPMs) were collected from 23 sites during two seasons. In wet season, the residues of ∑HCHs (α-HCH, ß-HCH, γ-HCH and δ-HCH) and ∑DDTs (p,p'-DDT, o,p'-DDT, p,p'-DDE, p,p'-DDD) ranged from 41.7 to 290 and 4.42 to 269 ng/L in surface water, while those varied from 0.86 to 157 and 1.79 to 96.1 ng/g dw in SPM, respectively. Moreover, in surface water, the levels of HCHs and DDTs in wet season were much higher than those in dry season. The reverse was true for residues of HCHs and DDTs in SPM. Compared with the large rivers in other regions, the levels of HCHs and DDTs in the studied area ranked at high levels and the residual concentrations might cause adverse biological risk, especially for ∑HCHs during wet season. Distributions of HCHs and DDTs delineated that the input of tributaries made a significant effect on the residue of HCHs and DDTs in the mainstream. ∑HCHs in surface water were consist of 26.7 % α-HCH, 30.0 % ß-HCH, 37.9 % γ-HCH and 5.45 % δ-HCH and those in SPM contained 5.16 % α-HCH, 22.1 % ß-HCH, 60.5 % γ-HCH and 12.2 % δ-HCH on average. Combined with ratios of α-HCH/γ-HCH in surface water (0.70) and in SPM (0.09), the results strongly indicated that lindane was recently used or discharged in the studied area. The mean percentage of DDTs' isomers were 28.7 % p,p'-DDT, 29.8 % o,p'-DDT, 28.1 % p,p'-DDE and 13.4 % p,p'-DDD in surface water, while those were 12.5 % p,p'-DDT, 31.8 % o,p'-DDT, 30.5 % p,p'-DDE and 25.1 % p,p'-DDD in SPM. The ratios of (DDE + DDD)/∑DDTs and o,p'-DDT/p,p'-DDT revealed that the DDTs in the studied area mainly derived from long-term weathering of technical DDTs residue and the input of dicofol.
[Mh] Termos MeSH primário: DDT/análise
Lindano/análise
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Agricultura
China
Dicofol
Monitoramento Ambiental
Sedimentos Geológicos/análise
Inseticidas
Resíduos de Praguicidas
Rios
Estações do Ano
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Insecticides); 0 (Pesticide Residues); 0 (Water Pollutants, Chemical); 59NEE7PCAB (Lindane); CIW5S16655 (DDT); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1701
[Cu] Atualização por classe:171019
[Lr] Data última revisão:
171019
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151224
[St] Status:MEDLINE


  4 / 136 MEDLINE  
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[PMID]:26456602
[Au] Autor:Wang Z; Yang T; Zhai Z; Zhang B; Zhang J
[Ad] Endereço:Collaborative Innovation Center for Regional Environmental Quality, State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University, Beijing 100871, China.
[Ti] Título:Reaction mechanism of dicofol removal by cellulase.
[So] Source:J Environ Sci (China);36:22-8, 2015 Oct 01.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:It remains unclear whether dicofol should be defined as a persistent organic pollutant. Its environmental persistence has gained attention. This study focused on its degradation by cellulase. Cellulase was separated using a gel chromatogram, and its degradation activity towards dicofol involved its endoglucanase activity. By analyzing the kinetic parameters of cellulase reacting with mixed substrates, it was shown that cellulase reacted on dicofol and carboxyl methyl cellulose through two different active centers. Thus, the degradation of dicofol was shown to be an oxidative process by cellulase. Next, by comparing the impacts of tert-butyl alcohol (a typical OH free-radical inhibitor) on the removal efficiencies of dicofol under both cellulase and Fenton reagent systems, it was shown that the removal of dicofol was initiated by OH free radicals produced by cellulase. Finally, 4,4'-dichloro-dibenzophenone and chloride were detected using gas chromatography mass spectrometry and ion chromatography analysis, which supported our hypothesis. The reaction mechanism was analyzed and involved an attack by OH free radicals at the orthocarbon of dicofol, resulting in the degradation product 4,4'-dichloro-dibenzophenone.
[Mh] Termos MeSH primário: Celulase/metabolismo
Dicofol/metabolismo
Inseticidas/metabolismo
Poluentes Químicos da Água/metabolismo
[Mh] Termos MeSH secundário: Cromatografia por Troca Iônica
Dicofol/química
Cromatografia Gasosa-Espectrometria de Massas
Peróxido de Hidrogênio/química
Inseticidas/química
Ferro/química
Cinética
Poluentes Químicos da Água/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Fenton's reagent); 0 (Insecticides); 0 (Water Pollutants, Chemical); BBX060AN9V (Hydrogen Peroxide); E1UOL152H7 (Iron); EC 3.2.1.4 (Cellulase); EC 3.2.1.4 (carboxymethylcellulase); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1607
[Cu] Atualização por classe:151012
[Lr] Data última revisão:
151012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151013
[St] Status:MEDLINE


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[PMID]:26362455
[Au] Autor:Li J; Li F; Liu Q
[Ad] Endereço:Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
[Ti] Título:Sources, concentrations and risk factors of organochlorine pesticides in soil, water and sediment in the Yellow River estuary.
[So] Source:Mar Pollut Bull;100(1):516-22, 2015 Nov 15.
[Is] ISSN:1879-3363
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The environmental occurrence, sources and risk factors of organochlorine pesticides (HCHs and DDTs) and their isomers or metabolites were studied using comprehensive surveys (including soil, surface water, groundwater and sediment sampling) conducted in the Yellow River Delta (YRD). HCHs and DDTs were all detected in multi environmental media. Compared with reported organochlorine pesticide values in China and abroad and with related environmental quality standards, the concentrations of HCHs and DDTs were generally at low levels in the YRD. Composition of OCPs (DDT metabolites and HCH isomers) showed that DDTs in the multiple environments of the YRD not only came from residues of dicofol but also from atmospheric deposition, while HCH pollution results from the historical usage of a mixture of technical HCH and lindane. Furthermore, the sum of Excess Lifetime Cancer Risk (∑ELCR) exposure to HCHs exceeded the generally acceptable risk level of 1.0E-06 recommended by the USEPA for carcinogenic chemicals.
[Mh] Termos MeSH primário: Sedimentos Geológicos/análise
Hidrocarbonetos Clorados/análise
Praguicidas/análise
Poluentes do Solo/análise
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: China
DDT/análise
Dicofol/análise
Monitoramento Ambiental/métodos
Estuários
Água Subterrânea
Seres Humanos
Lindano/análise
Fatores de Risco
Rios/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Hydrocarbons, Chlorinated); 0 (Pesticides); 0 (Soil Pollutants); 0 (Water Pollutants, Chemical); 59NEE7PCAB (Lindane); CIW5S16655 (DDT); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1608
[Cu] Atualização por classe:151215
[Lr] Data última revisão:
151215
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150913
[St] Status:MEDLINE


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[PMID]:26141889
[Au] Autor:Zhai Z; Yang T; Zhang B; Zhang J
[Ad] Endereço:Collaborative Innovation Center for Regional Environmental Quality, State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University, Beijing 100871, China.
[Ti] Título:Effects of metal ions on the catalytic degradation of dicofol by cellulase.
[So] Source:J Environ Sci (China);33:163-8, 2015 Jul 01.
[Is] ISSN:1001-0742
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:A new technique whereby cellulase immobilized on aminated silica was applied to catalyze the degradation of dicofol, an organochlorine pesticide. In order to evaluate the performance of free and immobilized cellulase, experiments were carried out to measure the degradation efficiency. The Michaelis constant, Km, of the reaction catalyzed by immobilized cellulase was 9.16 mg/L, and the maximum reaction rate, Vmax, was 0.40 mg/L/min, while that of free cellulase was Km=8.18 mg/L, and Vmax=0.79 mg/L/min, respectively. The kinetic constants of catalytic degradation were calculated to estimate substrate affinity. Considering that metal ions may affect enzyme activity, the effects of different metal ions on the catalytic degradation efficiency were explored. The results showed that the substrate affinity decreased after immobilization. Monovalent metal ions had no effect on the reaction, while divalent metal ions had either positive or inhibitory effects, including activation by Mn2+, reversible competition with Cd2+, and irreversible inhibition by Pb2+. Ca2+ promoted the catalytic degradation of dicofol at low concentrations, but inhibited it at high concentrations. Compared with free cellulase, immobilized cellulase was affected less by metal ions. This work provided a basis for further studies on the co-occurrence of endocrine-disrupting chemicals and heavy metal ions in the environment.
[Mh] Termos MeSH primário: Celulase/metabolismo
Dicofol/metabolismo
Metais/farmacologia
Praguicidas/metabolismo
[Mh] Termos MeSH secundário: Celulase/química
Dicofol/química
Poluentes Ambientais/química
Enzimas Imobilizadas/química
Enzimas Imobilizadas/metabolismo
Cinética
Praguicidas/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Enzymes, Immobilized); 0 (Metals); 0 (Pesticides); EC 3.2.1.4 (Cellulase); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1509
[Cu] Atualização por classe:150704
[Lr] Data última revisão:
150704
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150705
[St] Status:MEDLINE


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[PMID]:26131590
[Au] Autor:Liu L; Bai L; Man C; Liang W; Li F; Meng X
[Ad] Endereço:†State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
[Ti] Título:DDT Vertical Migration and Formation of Accumulation Layer in Pesticide-Producing Sites.
[So] Source:Environ Sci Technol;49(15):9084-91, 2015 Aug 04.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Soil samples were collected at various depths (0.5-21.5 m) from ten boreholes that were drilled with a SH-30 Model Rig, four of which were at a dicofol production site while six were at a dichlorodiphenyltrichloroethane (DDT) production site. In industrial sites, the shallow soils at depths of 0-2 m were mostly backfill soils, which cannot represent the contamination situation of the sites. The contaminated levels in the deep original soil can represent the situation in contaminated sites. All the soil samples investigated at the DDT and dicofol production sites were found to be seriously polluted. The contents of both DDT (0.6-6071 mg/kg) and dicofol (0.5-1440 mg/kg) were much higher at the dicofol production site than at the DDT production site (DDTs, 0.01-664.6 mg/kg; dicofol, <0.1 mg/kg), even in the deep soil. DDTs had a different distribution in the soil of the pesticide production site from that in the soil outside the sites and that in agricultural soils. The results of the investigation revealed that DDTs were easily enriched in cohesive soil and in the bottom zone of aquifers, where the concentration was higher than in above the layers. DDTs were found to be hard to degrade, and their degradation speed was slower than their vertical migration, despite the fact that hydrophobic DDTs did not migrate easily in soils. In the dicofol production site, the value of DDE/DDD cannot indicate the degradation condition of DDTs, nor can the value of (DDE + DDD)/DDT identify how long DDTs have remained in the soil. It is debatable that the half-life of DDT inputted to soils is about 20-30 years, maybe longer than the generally recognized time.
[Mh] Termos MeSH primário: DDT/análise
Praguicidas/análise
Poluentes do Solo/análise
[Mh] Termos MeSH secundário: China
DDT/química
DDT/metabolismo
Dicofol/química
Geografia
Isomerismo
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Pesticides); 0 (Soil); 0 (Soil Pollutants); CIW5S16655 (DDT); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1602
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150702
[St] Status:MEDLINE
[do] DOI:10.1021/acs.est.5b02456


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[PMID]:25442667
[Au] Autor:Li L; Liu J; Hu J
[Ad] Endereço:State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University , Beijing 100871, P.R. China.
[Ti] Título:Global inventory, long-range transport and environmental distribution of dicofol.
[So] Source:Environ Sci Technol;49(1):212-22, 2015 Jan 06.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The uncertainties on whether dicofol can be identified as a persistent organic pollutant (POP) in terms of its long-range transport (LRT) potential and global distribution, are always a controversial topic during international regulation deliberations. The lack of monitoring data in remote background regions necessitates a model-based evaluation approach for assessing the global distribution of dicofol. However, few model simulations are available at present, as there is no inventory available for global historical usage of dicofol that has sufficiently high spatial and temporal resolution. To describe the current status of global emission, we first developed an inventory of global dicofol usage for the period of 2000-2012 at 1° × 1° latitude/longitude resolution. We then assessed the LRT potential of dicofol by calculating its Arctic Contamination Potential using the Globo-POP model. In addition, we simulated the global mass distribution and the fate of dicofol in the environment using the BETR-Global model at 15° × 15° latitude/longitude resolution. Our estimated inventory established that over the period of 13 years, a total of 28.2 kilo tonnes (kt) of dicofol was applied and released into the environment. East and Southeast Asia, the Mediterranean Coast, and Northern and Central America were identified as hotspots of usage and release. Dicofol exhibited a higher Arctic Contamination Potential than several confirmed Arctic contaminants, and a larger current volume of consumption than most existing POPs. The results of our BETR-Global simulation suggest that (i) dicofol can indeed be transported northward, most likely driven by both atmospheric and oceanic advections from source regions at midlatitudes, and (ii) dicofol will be enriched in remote background regions. Continuous use of dicofol in source regions will result in exposure both locally and in remote regions, and the examination of the potential for adverse effects is therefore of paramount importance. Proactive restrictions at the international level may be warranted.
[Mh] Termos MeSH primário: Dicofol/análise
Poluentes Ambientais/análise
[Mh] Termos MeSH secundário: Agricultura/estatística & dados numéricos
Regiões Árticas
Ásia Sudeste
América Central
Monitoramento Ambiental
Inseticidas/análise
Região do Mediterrâneo
Modelos Teóricos
América do Norte
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Insecticides); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1509
[Cu] Atualização por classe:150107
[Lr] Data última revisão:
150107
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141203
[St] Status:MEDLINE
[do] DOI:10.1021/es502092x


  9 / 136 MEDLINE  
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[PMID]:25474054
[Au] Autor:Maeng I; Baek SH; Kim HY; Ok GS; Choi SW; Chun HS
[Ad] Endereço:Department of Chemistry and School of Food Science and Technology, Chung-Ang University, Ansung, Gyounggi 456-756, Republic of Korea.
[Ti] Título:Feasibility of using terahertz spectroscopy to detect seven different pesticides in wheat flour.
[So] Source:J Food Prot;77(12):2081-7, 2014 Dec.
[Is] ISSN:1944-9097
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This study investigated the feasibility of detecting pesticides using terahertz (THz) spectroscopy in high-density polyethylene and/or wheat flour mixtures. The absorption spectra of seven pesticides (dicofol, chlorpyrifos, chlorpyrifos-methyl, daminozide, imidacloprid, diethyldithiocarbamate, and dimethyldithiocarbamate) were measured in the frequency range 0.1 to 3 THz at room temperature. Five of the seven pesticides exhibited specific absorption peaks in the low-energy THz range. The two remaining pesticides had no specific absorption peaks in this frequency range, but they exhibited different frequency-dependent refractive indices. The absorption coefficients of imidacloprid increased with its increasing weight ratio in high-density polyethylene, and the fitted power absorptions and refractive indices using a Maxwell-Garnett effective medium model were comparable to the measured data. Imidacloprid was also identified from its characteristic absorption peaks in wheat flour mixtures, and a linear relationship between the absorption coefficient and the weight ratio was observed. Our results show the potential of detection of selected pesticides in foods, such as wheat flour, using THz spectroscopy.
[Mh] Termos MeSH primário: Farinha/análise
Praguicidas/análise
Espectroscopia Terahertz
Triticum/química
[Mh] Termos MeSH secundário: Carbamatos/análise
Clorpirifos/análogos & derivados
Clorpirifos/análise
Dicofol/análise
Dimetilditiocarbamato/análise
Ditiocarb/análise
Estudos de Viabilidade
Imidazóis/análise
Análise dos Mínimos Quadrados
Neonicotinoides
Nitrocompostos/análise
Polietileno
Sementes/química
Succinatos/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Carbamates); 0 (Dimethyldithiocarbamate); 0 (Imidazoles); 0 (Neonicotinoids); 0 (Nitro Compounds); 0 (Pesticides); 0 (Succinates); 3BN7M937V8 (imidacloprid); 9002-88-4 (Polyethylene); 99Z2744345 (Ditiocarb); F6KF33M5UB (daminozide); JCS58I644W (Chlorpyrifos); O49S38267J (chlorpyrifos-methyl); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1508
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141205
[St] Status:MEDLINE
[do] DOI:10.4315/0362-028X.JFP-14-138


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[PMID]:25204066
[Au] Autor:Xu XP; Xi YL; Chu ZX; Xiang XL
[Ti] Título:Effects of DDT and dicofol on population growth of Brachionus calyciflorus under different algal (Scenedesmus obliquus) densities.
[So] Source:J Environ Biol;35(5):907-16, 2014 Sep.
[Is] ISSN:0254-8704
[Cp] País de publicação:India
[La] Idioma:eng
[Ab] Resumo:A number of organochlorine pesticides, including DDT and dicofol, used to be important in crop protection and management. Their residues may reach water bodies and eventually affect the non-target organisms such as rotifers. In the present study, we evaluated the effects of DDT (0.05, 0.1, 0.2 and 0.4 mg l(-1)) and dicofol (0.1, 0.2, 0.4 and 0.8 mg l(-1)) on the population growth of rotifer Brachionus calyciflorus under two levels of Scenedesmus obliquus (1.0 x 10(6) and 3.0 x 10(6) cell ml(-1)). Regardless of the food level, DDT was more toxic than dicofol to B. calyciflorus. Under low food level, DDT at 0.1 and 0.2 mg l(-1) decreased the population growth rate (r), and DDT at 0.05-0.4 mg l(-1) decreased the maximum population density (K). Dicofol at 0.4 and 0.8 mg l(-1) decreased r and K, but dicofol at 0.2 mg l(-1) increased K. Under high food level, DDT at 0.05-0.2 mg l(-1) increased K, whereas DDT at 0.4 mg l(-1) as well as dicofol at 0.4 and 0.8 mg l(-1) decreased r and K. Increase in food level increased r exposed to DDT at 0.05-0.2 mg l(-1) as well as dicofol at 0.8 mg l(-1), and Kexposed to DDTat 0.05-0.2 mg l(-1) as well as dicofol at 0.1 and 0.2 mg l(-1). DDT concentration, algal density and their interaction affected r and K of B. calyciflorus. Both dicofol concentration and algal density affected r. Dicofol concentration, algal density and their interaction affected K. Both r and K were suitable endpoints for assessing the effects of DDT and dicofol on the rotifers population dynamics under two algal densities, and the latter was more sensitive.
[Mh] Termos MeSH primário: DDT/toxicidade
Dicofol/toxicidade
Rotíferos/efeitos dos fármacos
Scenedesmus
[Mh] Termos MeSH secundário: Animais
Cadeia Alimentar
Dinâmica Populacional
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
CIW5S16655 (DDT); W4WMM0WS91 (Dicofol)
[Em] Mês de entrada:1411
[Cu] Atualização por classe:170203
[Lr] Data última revisão:
170203
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:140911
[St] Status:MEDLINE



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