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Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes

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https://www.readbyqxmd.com/read/30638127/antifungal-activity-of-p3hb-microparticles-containing-tebuconazole
#1
Anna M Shershneva, Anastasia V Murueva, Natalia O Zhila, Tatiana G Volova
In this study, tebuconazole (TEB)-loaded poly-3-hydroxybutyrate (P3HB)-based microparticles were developed and comprehensively characterized. TEB-loaded microparticles with the initial loading amounts of the fungicide of 10, 25, and 50% of the polymer mass (TEB 10, TEB 25, and TEB 50%) were prepared using emulsion technique. Encapsulation efficiency of TEB varied from 59 to 86%. As the loading amount was increased, the average diameter of microparticles increased too, from 41.3 to 71.7 µm, while zeta potential was not influenced by TEB loading, varying between -32...
January 12, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30638119/rice-and-wheat-straw-ashes-characterization-and-modeling-of-pretilachlor-sorption-kinetics-and-adsorption-isotherm
#2
Anup Kumar, Abhishek Mandal, Neera Singh
The rice straw ash (RSA) and wheat straw ash (WSA) were explored as low cost adsorbent for pretilachlor removal from water. The ashes were characterized and sorption behavior of pretilachlor was evaluated. Kinetics study suggested that the modified Elovich model best explained the pretilachlor sorption on both the ashes. The adsorption data were analyzed using 2-, 3- and 4-parameter models and nine error functions were used to compute the best fit isotherm by nonlinear regression analysis. The pretilachlor was more sorbed onto the RSA (22...
January 12, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30633718/fate-of-the-organophosphorus-pesticide-profenofos-in-cotton-fiber
#3
Mingbo Ma, Suozhuai Dong, Wanhui Jin, Chongqi Zhang, Wenlong Zhou
Pesticides carried by cotton fiber are potential risk for production workers and consumers. Dissipation behaviour of a commonly used cotton pesticide profenofos in cotton fiber during growing period and scouring treatment was investigated. The results showed that profenofos in the fiber from the pre-opened and post-opened bolls both decreased to undetectable amounts 21 days after pesticide application. However, a minority of profenofos was converted to a strongly irritant compound, 4-bromo-2-chlorophenol and retained a non-negligible amount in cotton fiber even after 28 days...
January 11, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30633640/sorption-of-carbendazim-and-linuron-from-aqueous-solutions-with-activated-carbon-produced-from-spent-coffee-grounds-equilibrium-kinetic-and-thermodynamic-approach
#4
Ali Hgeig, Mladenka Novaković, Ivana Mihajlović
Spent coffee grounds (SCG) have been used for the production of activated carbon (AC) by impregnation with different ratios of phosphoric acid at 600 °C, Xp (H3 PO4 /coffee): 3:130% , 4:130% , 3:150% and 4:150% . The obtained AC was characterized by BET, FTIR and SEM. BET surface area corresponds to 803.422 m2 g-1 . The influences of the main parameters such as contact time, the pesticides initial concentration, adsorbent dose, pH and temperature on the efficiency of separation process were investigated during the batch operational mode...
January 11, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30633634/change-in-the-antimicrobial-resistance-profile-of-pseudomonas-aeruginosa-from-soil-after-exposure-to-herbicides
#5
Vânia Santos Braz, Jéssica Aparecida Silva Moretto, Ana Flavia Tonelli Fernandes, Eliana Guedes Stehling
The extensive use of pesticides represents a risk to human health and to the environment. This study aimed to investigate if the exposure to atrazine and diuron, two herbicides widely used in Brazil, could induce changes in the susceptibility profile to aztreonam, colistin and polymyxin B antimicrobials in isolates of P. aeruginosa obtained from soil samples by using the determination of minimum inhibitory concentration (MIC) test. Three isolates had an increase of MIC to aztreonam after exposure to both herbicides and one isolate did not show any MIC change...
January 11, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30628846/distribution-of-perfluorinated-alkyl-substances-in-marine-shellfish-along-the-chinese-bohai-sea-coast
#6
Mengmeng Guo, Guanchao Zheng, Jixing Peng, Di Meng, Haiyan Wu, Zhijun Tan, Fengling Li, Yuxiu Zhai
Perfluorinated alkyl substances (PFASs) are emerging persistent organic pollutants, which pose a threat to human health primarily by dietary exposure, especially through seafood. Bohai Sea (a semi-closed sea located north of China) is an important shellfish aquaculture area that is possibly highly-polluted with PFASs. In this study, we first evaluated contamination by PFASs in a total of 230 samples of marine shellfish from the Bohai Sea. Samples included five important shellfish species, collected from important aquaculture spots distributed around the Bohai Sea...
January 10, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30628556/bio-herbicidal-effects-of-five-essential-oils-on-germination-and-early-seedling-growth-of-velvetleaf-abutilon-theophrasti-medik
#7
Marija Sarić-Krsmanović, Jelena Gajić Umiljendić, Ljiljana Radivojević, Ljiljana Šantrić, Ivana Potočnik, Rada Đurović-Pejčev
The evaluation of the inhibition effect exerted by the essential oils of basil (Ocimum basilicum), sage (Salvia officinalis), thyme (Thymus vulgaris), lemon balm (Melissa officinalis) and goldenrod (Solidago virgaurea) on seeds germination and early seedling growth of velvetleaf (Abutilon theophrasti Medik.) weed was examined in a laboratory bioassay. The essential oils were obtained by hydrodistillation and characterized chemically by gas chromatography coupled with both mass spectrometry and flame ionization detector...
January 10, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30628546/the-biochemical-activity-of-soil-contaminated-with-fungicides
#8
Małgorzata Baćmaga, Jadwiga Wyszkowska, Jan Kucharski
Excess fungicides can pose a serious threat to the soil environment. Fungicides can lower the microbiological and biochemical activity of soil and lead to yield declines. Soils contaminated with fungicides have to be remediated to maintain the optimal function of soil ecosystems. This study evaluates the effect of neutralizing substances on soil enzymatic activity and the yield of Triticum aestivum L. in soil contaminated with fungicides. Sandy loam (Eutric Cambisols) with pHKCl 7.0 was contaminated with an aqueous solution of Amistar 250 SC and Falcon 460 EC in the following doses: 0 (soil without fungicide - treated as a control), RD (dose recommended by the manufacturer) and 300 × RD (dose 300-fold higher than the recommended dose)...
January 10, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30628538/trace-elements-and-microbiological-parameters-in-farmed-nile-tilapia-with-emphasis-on-muscle-water-sediment-and-feed
#9
Lilian D Steckert, William E Furtado, Gabriela T Jerônimo, Scheila A Pereira, Gabriel F A Jesus, José Luiz P Mouriño, Maurício L Martins
Fish may bioaccumulate contaminants from the aquatic environment and extend them to the food chain provoking risks to human health. This study evaluated the microbiological parameters of the pond´s water and trace elements concentrations in samples of water, sediment, feed and muscle of farmed Nile tilapia used for human consumption in southern Brazil. A total of 240 fish were collected from 12 tilapia farms. Sediment, tank water and dry ration used in the animals' diet were collected for analysis. Analysis were performed by Energy Dispersion X-ray Fluorescence (EDXRF), Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Induced Coupled Plasma Optical Emission Spectrometer (ICP-OES), and Atomic Absorption Spectrometer (AAS-VGA)...
January 10, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30628525/the-contribution-of-selected-organic-substrates-to-the-anaerobic-cometabolism-of-sulfamethazine
#10
Bruna M Oliveira, Marcelo Zaiat, Guilherme H D Oliveira
Biodegradation of organic micropollutants is likely to occur due to cometabolism by particular microbial groups. In an effort to identify the stages of anaerobic digestion potentially involved in the biodegradation of the veterinary antimicrobial sulfamethazine (SMZ), the influence of selected carbon sources (sucrose, glucose, fructose, ethanol, meat extract, cellulose, soluble starch, soy oil, acetic acid, propionic acid and butyric acid) on SMZ removal by anaerobic sludge was evaluated in short-term batch experiments...
January 10, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30614394/physical-chemical-and-biological-behaviour-of-fumigants-on-cottonseed
#11
Yu Xiao, Tao Liu, Chunyuan Gu, Jinghui Yu, Manjree Agarwal, Changyao Shan, YongLin Ren
Fumigation is required to protect cottonseed in storage and pre-shipment from insect pests and/or microorganisms. Fumigation of cottonseed with carbon disulphide (CS2 ), carbonyl sulphide (COS), ethanedinitrile (C2 N2 ), ethyl formate (EF), methyl bromide (MB) and phosphine (PH3 ) showed that >85% of the fumigants disappeared within 5 h of exposure. COS maintained >20 mg L-1 for 24 h. After 1 day of aeration, 75%-85% of the absorbed COS and MB and 20%-40% of the absorbed CS2 , EF and PH3 were released from treated cottonseed...
January 7, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30614388/cytotoxicity-of-gamma-irradiated-aflatoxin-b-1-and-ochratoxin-a
#12
Ana-Marija Domijan, Ana Marija Marjanović Čermak, Ana Vulić, Ivana Tartaro Bujak, Ivan Pavičić, Jelka Pleadin, Ksenija Markov, Branka Mihaljević
Toxicity of gamma irradiated mycotoxins aflatoxin B1 (AFB1 ) and ochratoxin A (OTA) was investigated in vitro. AFB1 and OTA stock solutions (50 mM, in methanol) were gamma irradiated (5 and 10 kGy) and non-irradiated and irradiated mycotoxins solutions were tested for cytotoxicity on Pk15, HepG2 and SH-SY5Y cell lines (MTT assay, 1-500 μM concentration range; 24 h exposure). Degradation of mycotoxin molecules was examined by liquid chromatography tandem mass spectrometry (HPLC-MS/MS). AFB1 and OTA radiolytic products were less toxic than the parent mycotoxins to all of the tested cell lines...
January 5, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30614368/human-intoxication-by-agrochemicals-in-the-region-of-south-brazil-between-1999-and-2014
#13
Camila Hendges, Andréia da Paz Schiller, Jéssica Manfrin, Eurides Kuster Macedo, Affonso C Gonçalves, José Renato Stangarlin
The objective of this study was to evaluate pesticide poisonings in the southern region of Brazil between years 1999 and 2014. Data were collected from the database Sinitox. Intoxications and deaths were evaluated according to the distribution by gender (female and male), age group (≤14, 15-59 and ≥60 years), area of occurrence (urban and rural), circumstance (accident, occupational and suicide attempt) and evolution of the cases over time (cure, unconfirmed cure, death and sequelae). In the evaluated period, 21,305 cases of intoxication were registered...
January 5, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30602326/determination-of-some-pesticide-residues-in-conventional-grown-and-ipm-grown-tomato-by-using-quechers-method
#14
Burak Polat, Osman Tiryaki
The present study was conducted to determine pesticide (emamectin-benzoate, penconazole and imidacloprid) residues over tomatoes by using QuEChERS method. The method was validated by spiking tomato matrix at 0.1, 1.0, and 10.0 MRL levels of the pesticides. Tomatoes were harvested from two conventional and two Integrated Pest Management-grown fields. Laboratory samples were taken from the bulk samples. Analyses of spiked and real-field tomatoes were performed with QuEChERS procedure. Experimental samples were subjected to LC-MS/MS analysis...
January 2, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30601689/effect-of-sewage-amendment-on-the-dissipation-of-terbuthylazine-its-degradation-compound-desethyl-terbuthylazine-and-s-metolachlor-in-a-field-study
#15
Laura Carretta, Alessandra Cardinali, Giuseppe Zanin, Roberta Masin
This study evaluates the effect of sewage amendment (SA) on the dissipation of terbuthylazine, its degradation compound desethyl-terbuthylazine, and S-metolachlor in the soil. The experiment was conducted at Padua Experimental Farm (Italy). Herbicides dissipation was evaluated in soils differently fertilized for three years: with inorganic fertilizer, with sewage sludge, and with a combination of them. Terbuthylazine and S-metolachlor were applied on sorghum as a formulated product at a dose of 2.8 L ha-1 , and their dissipation was followed for 2...
January 2, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30600768/simultaneous-determination-of-pesticides-mycotoxins-tropane-alkaloids-growth-regulators-and-pyrrolizidine-alkaloids-in-oats-and-whole-wheat-grains-after-online-clean-up-via-two-dimensional-liquid-chromatography-tandem-mass-spectrometry
#16
Michael Urban, Stephan Hann, Helmut Rost
In this study, a two-dimensional liquid chromatography tandem mass spectrometry method was developed and validated for the determination of pesticide residues and contaminants in whole wheat grains and oats. The samples were extracted with a mixture of acetonitrile and water and were injected into the two-dimensional LC-MS/MS system without any further clean-up or sample preparation. Samples were analyzed with four different matrix matched calibrations. Matrix effects were evaluated by comparing analyte signals in the respective matrix matched standard with the neat solvent standards...
January 2, 2019: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30596313/ozone-facilitated-degradation-of-caffeine-using-ce-tio-2-catalyst
#17
Vuyolwethu O Ndabankulu, Suresh Maddila, Sreekantha B Jonnalagadda
The ozone initiated oxidation of 1,3,7-trimethylxanthine (caffeine), commonly found in wastewaters as model compound is reported using cerium (Ce)/titanium dioxide (TiO2 ) as catalyst. The effect of pH and loading of ceria on titania were investigated. Effect of reaction conditions on degradation of caffeine based on their pseudo first-order rate constants were compared. The combination of catalyst Ce-TiO2 and ozone aeration significantly enhanced the degradation of caffeine compared to uncatalysed ozonation...
December 30, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30460878/dissipation-residues-and-risk-assessment-of-imidacloprid-in-zizania-latifolia-and-purple-sweet-potato-under-field-conditions-using-lc-ms-ms
#18
Yurong Yu, Shouyi Wang, Qingtao Zhang, Ya Yang, Ya Chen, Xiangwu Liu, Caiwei Feng, Deyu Hu, Ping Lu
A shortened version of Quick, Easy, Cheap, Effective, Rugged, and Safe method (QuEChERS) for determining the dissipation and residue of imidacloprid present in Zizania latifolia and purple sweet potato was established by using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The average recoveries of imidacloprid in the two crops ranged from 82.12 to 113.79%, with relative standard deviation (RSD) of <7.32%. The dissipation dynamics of imidacloprid in Z. latifolia plants and purple sweet potato plants followed first-order kinetics, with half-lives of 3...
November 21, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30460875/n-methylcarbamate-pesticides-and-their-phenolic-degradation-products-hydrolytic-decay-sequestration-and-metal-complexation-studies
#19
Michael Rivera, Bao Ha, Leili Zamini, Sonja Gamby, Demar Pitter, Clare N Muhoro
We report on the rates of decomposition of a group of N-methylcarbamate (NMC) pesticides (carbaryl, carbofuran and propoxur) under pre-determined tropical field conditions. Rates of decomposition for three NMCs were determined at pH 7.08 and T = 20 °C and pH 7.70 and T = 33 °C respectively, as follows: carbaryl (78 days and 69 days); carbofuran (143 days and 83 days) and propoxur (116 days and 79 days). Investigation on methods for removal of NMCs and their phenolic decomposition products shows that activated charcoal outperforms zeolite, alumina, diatomaceous earth, cellulose and montmorillonite clay in the removal of both NMCs and phenols from aqueous solution...
November 21, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30451059/elemental-distribution-in-the-edible-leaves-of-celosia-trigyna-from-the-western-and-northern-regions-of-nigeria
#20
Adebimpe Esther Ofusori, Roshila Moodley, Sreekantha Babu Jonnalagadda
Celosia trigyna, which belongs to the plant family Amaranthaceae, is a plant used in traditional medicine to treat several conditions such as sores, chest pains, diarrhoea and menstrual cramps in many countries in Africa. It is also consumed by the local people in Nigeria as soups, sauces and stews. In this study, the distribution and bioaccumulation of the elements in C. trigyna species and growth soil from the western and northern regions of Nigeria was investigated to determine the effects of geographical location on the uptake of elements by the plant...
November 19, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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