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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/29999452/application-of-a-lc-ms-ms-method-for-multi-mycotoxin-analysis-in-infant-formula-and-milk-based-products-for-young-children-commercialized-in-southern-brazil
#1
Karina M Tonon, Geovana D Savi, Vildes M Scussel
An analytical method based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) was validated and applied for the analysis of aflatoxin M1 (AFM1 ), ochratoxin A (OTA) and deoxynivalenol (DON) in infant formula and milk-based products for young children commercialized in Brazil. A total of 38 samples were evaluated, including 12 infant formula, 14 follow-on formula and 12 samples of milk-based products. AFM1 was detected in 12 (32%) samples, and seven (18%) samples contained AFM1 levels above the method limit of quantification in a concentration range between 0...
July 12, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29995574/developing-an-anaerobic-digester-with-external-zeolite-filled-column-for-enhancing-methane-production-from-swine-manure-a-feasibility-study
#2
D Thushari N Wijesinghe, Kithsiri B Dassanayake, Peter Scales, Deli Chen
Development of digesters with an external zeolite column facilitates the convenient removal of the zeolite with TAN, without disturbing the continuous anaerobic digestion process. A digester with an inside zeolite bed (In-Zeo) and digester without adding zeolite (No-Zeo) were employed to compare the process performance with digester with external zeolite column (EX-Zeo). The cumulative, CH4 yields were 5% and 15% greater in the EX-Zeo, and the In-Zeo digesters respectively compared to the No-Zeo digesters. Also, the % VS reduction was 49%, 55% and 41%, respectively in the Ex-Zeo, In-Zeo and No-Zeo digesters...
July 11, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29883252/absorption-and-translocation-of-sulfometuron-methyl-in-sugarcane-saccharum-officinarum-l-at-different-growth-stages
#3
Juliana Stéfani Jabur De Assis, Valdemar Luiz Tornisielo, Fabricia Cristina Dos Reis, Bianca A B Martins, Roberto Estevão Bragion Toledo, Ricardo Victória Filho
In Brazil, weed management in sugarcane fields is mainly done with the use of selective herbicide formulations. For many years, diuron+hexazinone was one of the main herbicide mixture formulations used in sugarcane. Later, sulfometuron-methyl was included in the same mixture, which was marketed as a new herbicide formulation for residual in-season weed control in sugarcane. The mixture diuron+hexazinone+sulfometuron-methyl has been widely used in commercial sugarcane fields in Brazil. However, recent field observations have shown that sugarcane plants at different growth stages varied in their phytotoxicity levels after treatment with diuron+hexazinone+sulfometuron-methyl...
June 8, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29883250/evaluation-of-the-inhibitory-effect-of-abamectin-on-mammalian-butyrylcholinesterase-enzyme-kinetic-and-molecular-docking-studies
#4
Kerem Teralı, Ozlem Dalmizrak, Qendresa Hoti, Nazmi Ozer
Abamectin, a blend of the natural avermectins B1a and B1b , is a widely-used insecticide/miticide with relatively low toxicity to mammals. Exposure to high doses of it, however, leads to cholinergic-like neurotoxic effects. Butyrylcholinesterase, which is best known for its abundant presence in plasma, is a serine hydrolase loosely coupled with the cholinergic system. It protects and supports the neurotransmitter function of its sister enzyme acetylcholinesterase. Here, using experimental and computational studies, we provide evidence demonstrating that abamectin is a potent (IC50 = 10...
June 8, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29883246/glyphosate-and-ampa-of-agricultural-soil-surface-water-groundwater-and-sediments-in-areas-prevalent-with-chronic-kidney-disease-of-unknown-etiology-sri-lanka
#5
Shankani Gunarathna, Buddhika Gunawardana, Mahesh Jayaweera, Jagath Manatunge, Kasun Zoysa
Glyphosate, which is commercially available as Roundup®, was the widely used herbicide in Sri Lanka until 2015 and is suspected to be one of the causal factors for Chronic Kidney Disease of unknown etiology (CKDu). This research, therefore, aims at studying the presence of glyphosate and Aminomethylphosphonic acid (AMPA) in different environmental matrices in CKDu prevalent areas. Topsoil samples from agricultural fields, water samples from nearby shallow wells and lakes, and sediment samples from lakes were collected and analyzed for glyphosate and AMPA using the LC/MS...
June 8, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29869930/alternative-low-cost-process-for-large-scale-production-of-bacillus-thuringiensis-in-a-simple-and-novel-culture-system
#6
Natalia L Rojas, Elizabeth S Lewkowicz, Matias L Nobile
An industrial-scale, profitable method for production of the most widely used bioinsecticide, Bacillus thuringiensis (Bt), is challenging because of its widespread application. The aim of this study is to present a strategy to develop a low-cost, large-scale bioprocess to produce Bt H14. This study was first focused on the design of a culture medium composed of economical and available components, such as glycerol and lysed Saccharomyces cerevisiae. The production goal of 1200 ITU was achieved using a medium composed of 20:20 g L-1 of glycerol:lysed yeast in batch cultures...
June 5, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29869926/direct-determination-of-neonicotinoid-insecticides-in-an-analytically-challenging-crop-such-as-chinese-chives-using-selective-elisas
#7
Eiki Watanabe, Shiro Miyake
Easy-to-use commercial kit-based enzyme-linked immunosorbent assays (ELISAs) have been used to detect neonicotinoid dinotefuran, clothianidin and imidacloprid in Chinese chives, which are considered a troublesome matrix for chromatographic techniques. Based on their high water solubility, water was used as an extractant. Matrix interference could be avoided substantially just diluting sample extracts. Average recoveries of insecticides from spiked samples were 85-113%, with relative standard deviation of <15%...
June 5, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29842846/metal-contents-and-potential-health-risk-assessment-of-crops-grown-in-a-former-mining-district-romania
#8
Mirela Miclean, Oana Cadar, Levente Levei, Lacrimoara Senila, Alexandru Ozunu
The Cd, Cu, Pb and Zn contents in home-grown crops in a former mining district were determined in order to evaluate the non-carcinogenic long-term potential health risk related to crop consumption. The potential health risk was investigated by estimating the daily intake and the hazard quotients. For all crop categories, the daily intake and the target hazard quotient were below the threshold values for Cd, Cu, and Zn. The daily intake of Pb exceeded the oral reference dose, while the target hazard quotient for vegetables was above 1, indicating a potential health risk...
May 29, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29842837/dissipation-of-terbuthylazine-metolachlor-and-mesotrione-in-soils-with-contrasting-texture
#9
Laura Carretta, Alessandra Cardinali, Ester Marotta, Giuseppe Zanin, Roberta Masin
This study evaluates the dissipation of terbuthylazine, metolachlor, and mesotrione at different depths in soils with contrasting texture. The field trial was conducted at the Padua University Experimental Farm, north-east Italy. The persistence of three herbicides was studied in three different soil textures (clay soil, sandy soil, and loamy soil) at two depths (0-5 and 5-15 cm). Soil organic carbon content was highest in the clay (1.10%) followed by loam (0.67%) and sandy soil (0.24%); the pH of soils was sub-alkaline...
May 29, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29842827/pesticide-binding-and-urea-induced-controlled-release-applications-with-calixarene-naphthalimide-molecules-by-host-guest-complexation
#10
Bahar Yilmaz, Nevzat Aydin, Mevlut Bayrakci
Three novel calix[4]arene molecule-based 1,8 naphthalimide fluoroionophore for the selective determination of kesoxim-methyl were synthesized and used in pesticide binding studies. The possible interaction between pesticides and fluorescent calix[4]arene molecules was monitored by UV/Vis absorption and fluorescence spectroscopy. When compared the studied pesticides, kesoxim-methyl was strongly quenched the fluorescence intensity of upper rim-modified calix[4]arene. UV and fluorescence titration experiments were also studied to determine both the quenching mechanism and stoichiometric ratio consisted in complex formation...
May 29, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29842826/effects-of-cyclodextrin-on-the-stereoselectivity-inhibition-of-acetylcholinesterase-by-isomalathion
#11
Jian Q Sun, Ning E Tao, An P Zhang, Hong Qi
In attempt to evaluate the effects of cyclodextrins (CDs) on enantioselectivity of chiral pesticides toxicity, this study investigated effects of three kinds of cyclodextrins including α-CD, β-CD and randomly methylated β-CD (RAMEB) on toxicity of four enantiomers of isomalathion including (1R, 3R)-isomalathion, (1S, 3S)-isomalathion, (1S, 3R)-isomalathion and (1R, 3S)-isomalathion. Generally, the addition of α-CD and RAMEB (1.5 g/L to 3.5 g/L concentration) could lead to reduction of isomalathion toxicity in most cases, while the presence of β-CD (0...
May 29, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29787687/rapid-determination-of-polar-pesticides-and-plant-growth-regulators-in-fruits-and-vegetables-by-liquid-chromatography-tandem-mass-spectrometry
#12
Narong Chamkasem
A simple high-throughput liquid chromatography/tandem mass spectrometry (LC-MS/MS) multiresidue analysis method was developed for the simultaneous determination of polar pesticides, plant growth regulators and other polar compounds. These included amitrole, chlormequat, mepiquat, cyromazine, ETU, PTU, perchlorate, and daminozide using a mixed-mode column. A 10 g test portion was shaken with acidified methanol for 10 min. After centrifugation, the sample extract was injected and analyzed within 11 min by LC-MS-MS...
May 22, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29787361/sorption-and-degradation-of-neonicotinoid-insecticides-in-tropical-soils
#13
Enock Dankyi, Chris Gordon, Derick Carboo, Vitus A Apalangya, Inge S Fomsgaard
Neonicotinoids are the most widely applied class of insecticides in cocoa farming in Ghana. Despite the intensive application of these insecticides, knowledge of their fate in the Ghanaian and sub-Saharan African environment remains low. This study examined the behavior of neonicotinoids in soils from cocoa plantations in Ghana by estimating their sorption and degradation using established kinetic models and isotherms. Studies of sorption were conducted using the batch equilibrium method on imidacloprid, thiamethoxam, clothianidin, acetamiprid and thiacloprid, while degradation of imidacloprid, thiamethoxam and their respective deuterated counterparts was studied using models proposed by the European forum for coordination of pesticide fate and their use (FOCUS)...
May 22, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29775426/impact-of-a-native-streptomyces-flavovirens-from-mushroom-compost-on-green-mold-control-and-yield-of-agaricus-bisporus
#14
Ljiljana Šantrić, Ivana Potočnik, Ljiljana Radivojević, Jelena Gajić Umiljendić, Emil Rekanović, Bojan Duduk, Svetlana Milijašević-Marčić
Thirty-five actinobacterial isolates, obtained from button mushroom (Agaricus bisporus) substrates (i.e., compost in different phases of composting, black peat or casing layer) in Serbia in 2014-2016 were tested in vitro against the causal agents of green mold in cultivated mushroom. Out of six most promising isolates, A06 induced 42.4% in vitro growth inhibition of Trichoderma harzianum T54, and 27.6% inhibition of T. aggressivum f. europaeum T77. The novel strain A06 was identified as Streptomyces flavovirens based on macroscopic and cultural characteristics and 16S rDNA sequence and used in mushroom growing room experiments...
May 18, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29775424/optimized-yeast-based-in-vitro-bioassay-for-determination-of-estrogenic-and-androgenic-activity-of-hydroxylated-methoxylated-metabolites-of-bdes-cbs-and-related-lipophilic-organic-pollutants
#15
Marek Roszko, Marta Kamińska, Krystyna Szymczyk, Katarzyna Piasecka-Jóźwiak, Beata Chabłowska
Persistent organic pollutants (POPs) are known to show endocrine disrupting (ED) activity, including interactions with hormone receptors. The aim of this work was to develop a bioassay applicable for evaluation of ED potency of highly lipophilic metabolites of POPs. To that end, a yeast-based bio-assay protocol was used. Estrogenic / androgenic activity of some native brominated biphenyl ethers (BDEs) / chlorinated biphenyls (CBs), and their hydroxylated / methoxylated metabolites was assessed. Since data (including potency compared to reference native hormones) obtained using different protocols vary, the possibility that yeast transforms POPs into some more potent compounds was first checked; it seems that no such transformation is important from the test applicability standpoint...
May 18, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29768098/surface-enhanced-raman-spectroscopic-analysis-of-n-6-benzylaminopurine-residue-quantity-in-sprouts-with-gold-nanoparticles
#16
Ping Zhang, Li M Wang, Da W Zheng, Tai F Lin, Xiao D Wei, Xiao Y Liu, Hui Q Wang
A rapid and quantitative method for the determination of N6 -Benzylademine (N6 -BA) was established through the application of surface-enhanced Raman spectroscopy (SERS). The Raman peak intensities of N6 -BA at 1002 cm-1 positively correlated to N6 -BA concentrations in sprout extracts. The R2 reached 0.99, and RSDs calculated below 10% at the concentration range of 0.1 ∼5μg mL-1 . The average recoveries were 80.0% ∼ 98.2% for blank samples intentionally contaminated at differing levels of 0.04, 0.4, and 1 μg g-1 ...
May 16, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29719194/mineral-constituents-in-leccinum-scabrum-from-lowland-locations-in-the-central-europe-and-their-relation-to-concentration-in-forest-topsoil
#17
Jerzy Falandysz
Leccinum scabrum is an edible mushroom common in European regions in the northern hemisphere. Macro and trace mineral constituents such as Ag, Al, Ba, Ca, Cd, Co, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, P, Rb, Sr and Zn were studied in L. scabrum and in the top soil collected from the same location underneath soil substratum. The "pseudo-total" and labile (extractable fraction of minerals) were measured to get insight into the levels, distribution between the morphological parts of fruiting bodies, potential for their bioconcentration by mushroom and evaluated for human exposure via consumption of the mushroom...
May 2, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29708850/examination-of-the-influence-of-phenyltrimethylammonium-chloride-ptma-concentration-on-acetochlor-adsorption-by-modified-montmorillonite
#18
Lazar M Kaluđerović, Zorica P Tomić, Darko P Ašanin, Rada D Đurović-Pejčev, Branka J Kresović
The results presented in this paper show an impact of the concentration of the aromatic organic cation on the adsorption of acetochlor on the surface of the organic-modified montmorillonite. Natural montmorillonite from Bogovina (Boljevac municipality, Serbia) was used for organic modification in this experiment. Cation exchange capacity of this montmorillonite (86 mmol 100 g-1 of clay) was determined using the methylene blue method. In pretreatment, montmorillonite was modified with NaCl. For the purpose of organic modification, three different concentrations of phenyltrimethylammonium chloride (PTMA) have been selected, based on calculated CEC value: 43 mmol 100 g-1 of clay (0...
April 30, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29708841/chemical-indicators-of-exposure-to-polychlorodibenzo-p-dioxins-polychlorodibenzofurans-and-polychlorobiphenyls-in-breast-milk-samples-from-mothers-residing-in-trento-italy-and-neighboring-country-municipalities
#19
Miniero Roberto, Ferri Fabiola, Carraro Valter, Franchini Silva, Fulgenzi Anna Rita, Iacovella Nicola, Ingelido Anna Maria, De Felip Elena
A human biomonitoring study was carried out in the province of Trento, northern Italy, on two groups of women residing in areas with presumably different levels of exposure to polychlorodibenzo-p-dioxins (PCDDs), polychlorodibenzofurans (PCDFs) and polychlorobiphenyls (PCBs). The aim was characterization of the possible impact of a steel plant and an urban environment on the internal doses of these contaminants. The areas investigated were the following: (i) the municipality of Borgo Valsugana, where a steel plant has been operating for the last 30 years, and (ii) the city of Trento...
April 30, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29708834/antioxidant-activity-shown-by-olive-pomace-extracts
#20
Alessandra De Bruno, Rosa Romeo, Francesca L Fedele, Andrea Sicari, Amalia Piscopo, Marco Poiana
In this study, the effects of experimental variables such as type of solvent, sample/solvent ratio, and time of extraction have been evaluated to individuate the best results in phenolic recovery by Olive Pomaces (OP) belonging to Carolea and Ottobratica cultivars. Folin-Ciocaulteu procedure and DPPH and ABTS assays were used, respectively, for total phenol quantification and total antioxidant activity of pomace extracts. The ethanol/water mixture was resulted the most efficient extraction solvent for both olive cultivars...
April 30, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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