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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/29431600/subcritical-water-oxidation-of-propham-by-h2o2-using-response-surface-methodology-rsm
#1
Erdal Yabalak, Özkan Görmez, Ahmet Murat Gizir
This study was conducted to investigate the degradation of propham, which is a compound that pollutes water and seriously threatens human health, by subcritical water oxidation and using H2O2 as an oxidising agent. The maximum total organic carbon removal rate of propham was obtained as 73.65% at 40 min of treatment time and 60 mM of H2O2 concentration and 373 K of temperature. In addition, response surface method based on the Box-Behnken design was applied to design the degradation experiments of propham for determination of the combined effects of process variables, namely temperature, concentration of oxidising agent and treatment time...
February 12, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29431582/soils-impacted-by-pahs-would-the-stabilized-organic-matter-be-a-green-tool-for-the-immobilization-of-these-noxious-compounds
#2
Paulo R Dores-Silva, Jussara A O Cotta, Maria D Landgraf, Maria O O Rezende
The objective of this study was to investigate the role of stabilized organic matter (vermicompost) and tropical soils in the sorption of naphthalene, anthracene and benzo[a]pyrene. The results obtained for the three compounds were extrapolated for the priority polycyclic aromatic hydrocarbons (PAHs) pollutants according to Environmental Protection Agency (US EPA). To evaluate the sorption process, high performance liquid chromatography was employed and the data was fitted by Freundlich isotherms. The results suggest that the sorption effect generally increases with the number of benzene rings of the PAHs, and that the persistence of PAHs in the environment is possibly related to the number of benzene rings in the PAH molecule...
February 12, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29431579/simultaneous-biodegradation-of-bifenthrin-and-chlorpyrifos-by-pseudomonas-sp-cb2
#3
Qun Zhang, Shuhuai Li, Chen Ma, Nancun Wu, Chunli Li, Xinfeng Yang
The degradation of bifenthrin (BF) and chlorpyrifos (CP), either together or individually, by a bacterial strain (CB2) isolated from activated sludge was investigated. Strain CB2 was identified as belonging to genus Pseudomonas based on the morphological, physiological, and biochemical characteristics and a homological analysis of the 16S rDNA sequence. Strain CB2 has the potential to degrade BF and CP, either individually or in a mixture. The optimum conditions for mixture degradation were as follows: OD600nm = 0...
February 12, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29431569/selective-effects-of-fenitrothion-on-murine-splenic-t-lymphocyte-populations-and-cytokine-granzyme-production
#4
Hong Liu, Jiang X Li, Jing L Tian, Chen Wang, Yu X Wang, Yi F Wan, Qiang Weng, Mei Y Xu
The aim of this study was to investigate in vitro effects of fenitrothion (FNT) on mouse splenic lymphocytes. Here, naïve mice had their spleens harvested and splenocytes isolated. After exposure to FNT for 48 hr: splenocyte viability was measured using a tetrazolium dye assay; cell phenotypes, i.e., B-cells (CD19+), T-cells (CD3+), and T-cell subsets (CD4+ and CD8+), were quantified by flow cytometry; and, production of cytokines/granzyme-B was assessed via enzyme-linked immunosorbent assay. The ability for FNT to induce oxidative stress in the cells was evaluated by measuring hydroxyl radical (·OH) and malondialdehyde (MDA) production and changes in glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) activity...
February 12, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29393822/development-and-validation-of-lc-ms-ms-method-for-the-determination-of-ochratoxin-a-and-its-metabolite-ochratoxin-%C3%AE-in-poultry-tissues-and-eggs
#5
Angela Paoloni, Michele Solfrizzo, Rita Bibi, Ivan Pecorelli
The objective of this study was to develop a liquid chromatography tandem mass spectrometry (LC-MS/MS) method for the determination of Ochratoxin A (OTA) and Ochratoxin α (OTα) in poultry tissues and eggs. The two toxins were extracted by a mixture of acetonitrile/water, purified with a reversed phase C18 solid phase extraction column (SPE) and determined by LC-MS/MS. The LC-MS/MS method performances were evaluated in terms of linearity in solvent and in matrix (ranged from 0.5 to 15.10 µg L-1 for OTA and from 0...
February 2, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29336683/adsorption-of-2-4-dichlorophenoxyacetic-acid-and-4-chloro-2-metylphenoxyacetic-acid-onto-activated-carbons-derived-from-various-lignocellulosic-materials
#6
Beata Doczekalska, Krzysztof Kuśmierek, Andrzej Świątkowski, Monika Bartkowiak
Adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) and 4-chloro-2-metylphenoxyacetic acid (MCPA) from aqueous solution onto activated carbons derived from various lignocellulosic materials including willow, miscanthus, flax, and hemp shives was investigated. The adsorption kinetic data were analyzed using two kinetic models: the pseudo-first order and pseudo-second order equations. The adsorption kinetics of both herbicides was better represented by the pseudo-second order model. The adsorption isotherms of 2,4-D and MCPA on the activated carbons were analyzed using the Freundlich and Langmuir isotherm models...
January 16, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29336667/influence-of-long-term-consumption-of-bitter-apricot-seeds-on-risk-factors-for-cardiovascular-diseases
#7
Jana Kopčeková, Anna Kolesárová, Anton Kováčik, Eva Kováčiková, Martina Gažarová, Peter Chlebo, Jozef Valuch, Adriana Kolesárová
The present study was designed to reveal whether long-term consumption of bitter apricot seeds causes changes in lipid profile and other risk factors for cardiovascular diseases. The study group consisted of 12 healthy adult volunteers (5 females and 7 males). The average age of women was 41.60 ± 11.28 years and the average age of men was 36.71 ± 13.70 years. Volunteers consumed 60 mg kg -1 of body weight of bitter apricot seeds divided into 8-12 doses daily for 12 weeks. Volunteers were recruited from the general population of Slovak Republic...
January 16, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29336665/pesticide-exposure-and-health-conditions-among-orange-growers-in-southern-brazil
#8
Joice Lermen, Tanandra Bernieri, Isabel S Rodrigues, Edna S Suyenaga, PatrÍcia G Ardenghi
This study aimed to evaluate the exposure to pesticides through the biomarkers analysis, as well as life habits and use of Personal Protective Equipment (PPE) in a group of farmers who grow citrus in the Vale do Caí region, in Rio Grande do Sul, southern Brazil. The study population consisted of 73 volunteer farmers, 45 males and 28 females, aged between 13 and 69 years old. The control group consisted of 30 individuals who were not exposed to pesticides. Measures of urea, creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyltransferase (GGT), plasma cholinesterase (BChE) activity, and hematological parameters were analyzed...
January 16, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29336664/grab-and-passive-sampling-applied-to-pesticide-analysis-in-the-s%C3%A3-o-louren%C3%A3-o-river-headwater-in-campo-verde-mt-brazil
#9
André Berton, Michelle F Brugnera, Eliana F G C Dores
In this study, the quality of surface water in the headwaters of São Lourenço River in Mato Grosso, Brazil, was evaluated in relation to contamination by pesticides. For this purpose, samples were collected between December 2015 and June 2016 by grab sampling and by passive sampling using an integrative polar organic compound sampler installed in the field during four 14-day cycles between March and June 2016. The analyses were performed by gas chromatography (CG/MS) and by liquid chromatography (UPLC-MS/MS)...
January 16, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29319411/cantilever-nanobiosensor-using-tyrosinase-to-detect-atrazine-in-liquid-medium
#10
Janine Martinazzo, Daniela K Muenchen, Alexandra N Brezolin, Alana M Cezaro, Aline A Rigo, Alexandra Manzoli, Lucélia Hoehne, Fábio L Leite, Juliana Steffens, Clarice Steffens
The aim of this study was to develop a cantilever nanobiosensor for atrazine detection in liquid medium by immobilising the biological recognition element (tyrosinase vegetal extract) on its surface with self-assembled monolayers using gold, 16-mercaptohexadecanoic acid, 1-ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride/n-hydroxysuccinimide. Cantilever nanobiosensors presented a surface compression tension increase when atrazine concentrations were increased, with a limit of detection and limit of quantification of 7...
January 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29293401/reference-values-for-acetyl-and-butyrylcholinesterases-in-cattle-under-actual-management-conditions-hepatic-and-renal-function-by-application-of-chlorpyrifos
#11
Daniela M Ferré, Valeria R Lentini, R Raquel Romano, Hector R Ludueña, Paola J Jotallán, Nora B M Gorla
Chlorpyrifos is an anticholinesterase organophosphate insecticide widely used in Argentina in the production of food derived from animal, fruit and horticultural origin and is reported as a residue within these products. Local reference values for acetyl and butyrylcholinesterase were determined in Aberdeen Angus bovine and cross bred cattle (n = 25), a requirement to be able to evaluate toxicity of commercial organophosphate and carbamate formulations. The activity of cholinesterase enzymes presented an overall mean of 2,183...
January 2, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29293381/investigating-the-toxic-effects-of-2-aminoanthracene-ingestion-in-pregnant-sprague-dawley-dams
#12
Hannah K Wilson, Steven A Buckeridge, Wilson Yau, Elizabeth W Howerth, Worlanyo E Gato
Polycyclic aromatic hydrocarbons (PAHs) refer to organic compounds that are byproducts of incomplete combustion of fossil fuels and wood. One specific polycyclic aromatic hydrocarbon, 2-aminoanthracene (2AA), is a member of a broader group of compounds known as anthracenes, which have been classified by the United States Agency for Toxic Substances and Disease Registry (ASTDR) as one of a group of PAHs of top concern based on their greater potential risk for exposure and greater harmful effects to humans, compared to other PAHs...
January 2, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29286885/stability-of-pentobarbital-in-soil
#13
Chasity Bagsby, Anita Saha, Granville Goodin, Sheeba Siddiqi, Mary Farone, Anthony Farone, Paul C Kline
Intravenous injection of barbiturates, particularly pentobarbital (5-ethyl-5-pentan-2-yl-1,3-diazinane-2,4,5-trione), is a widely used method to euthanize large animals such as horses. However, one concern with this method is the fate of pentobarbital after the disposal of the carcass. As tissues decompose, pentobarbital may leach into the soil and from there migrate to groundwater. A method using methanol extraction, solid phase concentration, and liquid chromatography (LC/MS) has been developed to measure pentobarbital in soils...
December 29, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29286883/antifungal-activities-against-toxigenic-fusarium-specie-and-deoxynivalenol-adsorption-capacity-of-ion-exchanged-zeolites
#14
Geovana D Savi, William A Cardoso, Bianca G Furtado, Tiago Bortolotto, Elton T Zanoni, Rahisa Scussel, Lucas F Rezende, Ricardo A Machado-de-Ávila, Oscar R K Montedo, Elidio Angioletto
Zeolites are often used as adsorbents materials and their loaded cations can be exchanged with metal ions in order to add antimicrobial properties. The aim of this study was to use the 4A zeolite and its derived ion-exchanged forms with Zn2+, Li+, Cu2+ and Co2+ in order to evaluate their antifungal properties against Fusarium graminearum, including their capacity in terms of metal ions release, conidia germination and the deoxynivalenol (DON) adsorption. The zeolites ion-exchanged with Li+, Cu2+, and Co2+ showed an excellent antifungal activity against F...
December 29, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29286876/proton-induced-accelerated-decay-of-the-fungicide-vinclozolin-on-tio2-surface-under-solar-irradiation-experimental-and-dft-study
#15
Ivan Osipov, Mikhail Y Gorbachev, Natalia N Gorinchoy
The photochemical degradation of vinclozolin by addition of titanium dioxide on silica support has been examined both experimental and quantum-chemically. Solar irradiation of vinclozolin on silica with and without addition of titanium dioxide for 6 h resulted in 21% and 97.8% vinclozolin residues, respectively. In both these cases, phototransformation leads to the formation of (3,5-dichlorophenyl isocyanate) and (3,5-dichloroaniline). The presence of the intermediary product resulted from opening of the 2,4-oxazolidine-dione ring is also confirmed by GS-MS and LC-MS chromatography...
December 29, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29286873/leaching-and-sorption-of-neonicotinoid-insecticides-and-fungicides-from-seed-coatings
#16
Kelly L Smalling, Michelle L Hladik, Corey J Sanders, Kathryn M Kuivila
Seed coatings are a treatment used on a variety of crops to improve production and offer protection against pests and fungal outbreaks. The leaching of the active ingredients associated with the seed coatings and the sorption to soil was evaluated under laboratory conditions using commercially available corn and soybean seeds to study the fate and transport of these pesticides under controlled conditions. The active ingredients (AI) included one neonicotinoid insecticide (thiamethoxam) and five fungicides (azoxystrobin, fludioxonil, metalaxyl, sedaxane thiabendazole)...
December 29, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29281503/impact-of-metal-ionic-characteristics-on-adsorption-potential-of-ficus-carica-leaves-using-qspr-modeling
#17
Fozia Batool, Shahid Iqbal, Jamshed Akbar
The present study describes Quantitative Structure Property Relationship (QSPR) modeling to relate metal ions characteristics with adsorption potential of Ficus carica leaves for 13 selected metal ions (Ca+2, Cr+3, Co+2, Cu+2, Cd+2, K+1, Mg+2, Mn+2, Na+1, Ni+2, Pb+2, Zn+2, and Fe+2) to generate QSPR model. A set of 21 characteristic descriptors were selected and relationship of these metal characteristics with adsorptive behavior of metal ions was investigated. Stepwise Multiple Linear Regression (SMLR) analysis and Artificial Neural Network (ANN) were applied for descriptors selection and model generation...
December 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29278988/cytotoxic-activity-of-the-bioactive-principles-from-ficus-burtt-davyi
#18
Olumuyiwa O Ogunlaja, Roshila Moodley, Moganavelli Singh, Himansu Baijnath, Sreekanth B Jonnalagadda
Ficus burtt-davyi (Moraceae) is a medicinal plant species indigenous to Southern Africa. In this study, a phytochemical and cytotoxic investigation on F. burtt-davyi was conducted to evaluate its ethno-medicinal use. The phytochemical study of the fruits yielded triterpenoids (lupeol and α-amyrin). The cytotoxic evaluation was done on the methanolic extracts and selected compounds, lupeol, α-amyrin, lupeol acetate and (+)-catechin isolated from F. burtt-davyi stem bark and fruits. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) cell viability assay was carried out against two human cancer cell lines, breast adenocarcinoma (MCF-7) and colorectal adenocarcinoma (Caco-2), and normal human embryonic kidney cells (HEK293)...
December 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29278983/development-validation-and-matrix-effect-of-a-quechers-method-for-the-analysis-of-organochlorine-pesticides-in-fish-tissue
#19
Tatiana R De O Stremel, Cinthia E Domingues, Rosimara Zittel, Cleber P Silva, Patricia L Weinert, Franciele C Monteiro, Sandro X Campos
This study aims to develop and validate a method to determine OCPs in fish tissues, minimizing the consumption of sample and reagents, by using a modified QuEChERS along with ultrasound, d-SPE and gas chromatography with an electron capture detector (GC-ECD), refraining the pooling. Different factorial designs were employed to optimize the sample preparation phase. The validation method presented a recovery of around 77.3% and 110.8%, with RSD lower than 13% and the detection limits were between 0.24 and 2...
December 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29278977/high-sensitivity-direct-analysis-of-aflatoxins-in-peanuts-and-cereal-matrices-by-ultra-performance-liquid-chromatography-with-fluorescence-detection-involving-a-large-volume-flow-cell
#20
Dasharath Oulkar, Arnab Goon, Manisha Dhanshetty, Zareen Khan, Sagar Satav, Kaushik Banerjee
This paper reports a sensitive and cost effective method of analysis for aflatoxins B1, B2, G1 and G2. The sample preparation method was primarily optimised in peanuts, followed by its validation in a range of peanut-processed products and cereal (rice, corn, millets) matrices. Peanut slurry [12.5 g peanut + 12.5 mL water] was extracted with methanol: water (8:2, 100 mL), cleaned through an immunoaffinity column and thereafter measured directly by ultra-performance liquid chromatography-fluorescence (UPLC-FLD) detection, within a chromatographic runtime of 5 minutes...
December 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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