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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/28679083/antimicrobial-resistance-in-escherichia-coli-and-salmonella-spp-isolates-from-fresh-produce-and-the-impact-to-food-safety
#1
Pierangeli G Vital, Marie Bernadine D Caballes, Windell L Rivera
Foodborne diseases associated with fresh produce consumption have escalated worldwide, causing microbial safety of produce of critical importance. Bacteria that have increasingly been detected in fresh produce are Escherichia coli and Salmonella spp., both of which have been shown to progressively display antimicrobial resistance. The study focused on the assessment of antimicrobial resistance of these enteric bacteria from different kinds of fresh produce from various open air markets and supermarkets in the Philippines...
July 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28679077/occurrence-of-imidacloprid-carbendazim-and-other-biocides-in-italian-house-dust-potential-relevance-for-intakes-in-children-and-pets
#2
Severyn Salis, Cecilia Testa, Paola Roncada, Sara Armorini, Nicola Rubattu, Angelo Ferrari, Roberto Miniero, Gianfranco Brambilla
The occurrence of pesticides intended for non-agricultural use was investigated in 206 dust samples drawn from vacuum-cleaner bags from residential flats in Italy. The multi-residue analysis targeted on 95 different active principles was performed with UPLC-MS/MS, with a Limit of Quantification (LOQ) of 0.008 μg/g dry weight. The results indicated the presence of imidacloprid (IMI) and carbendazim (CARB) in 30% and 26% of the samples, with a mean and P95 concentration between 1.6 and 39 and between 0.08 and 4...
July 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28679074/occurrence-and-dietary-exposure-assessment-of-pfos-and-pfoa-in-cultured-trachinotus-ovatus-in-china
#3
Di Meng, Mengmeng Guo, Yongzhong Qian, Gang Han
In this study, investigation was conducted into concentrations of perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in Chinese farmed Trachinotus ovatus between 2014 and 2015 using a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) and ultra fast liquid chromatography-tandem mass spectrometry (UFLC-MS/MS) method. The tissue distribution (muscle, skin, liver, kidney and gill) in Trachinotus ovatus was also assessed. The detection frequencies of PFOS and PFOA in fish were 92% and 3%, respectively, and the mean concentrations were 0...
July 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28679071/uncertainty-of-exposure-assessment-of-consumers-to-pesticide-residues-derived-from-food-consumed
#4
Júlia Szenczi-Cseh, Árpád Ambrus
The sources of quantitative and qualitative uncertainties of the exposure of a consumer to a pesticide residue are identified. The contribution of quantifiable uncertainties of input parameters of deterministic model to the combined uncertainty of the estimated exposure is shown with detailed calculation using the pesticide residue content of food consumed during two days. The daily intakes of bifenthrin residues calculated for the 60 kg bodyweight of the reporting person are 0.00257 mg/kgbw and 0.00281 mg/kgbw for day 1 and day 2, respectively with 27-28% combined uncertainty...
July 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28679066/agro-waste-biosorbents-effect-of-physico-chemical-properties-on-atrazine-and-imidacloprid-sorption
#5
Abhishek Mandal, Neera Singh, Lata Nain
Low cost agro-waste biosorbents namely eucalyptus bark (EB), corn cob (CC), bamboo chips (BC), rice straw (RS) and rice husk (RH) were characterized and used to study atrazine and imidacloprid sorption. Adsorption studies suggested that biosorbents greatly varied in their pesticide sorption behaviour. The EB was the best biosorbent to sorb both atrazine and imidacloprid with KF values of 169.9 and 85.71, respectively. The adsorption isotherm were nonlinear in nature with slope (1/n) values <1. The Freundlich constant Correlating atrazine/imidacloprid sorption parameter [KF...
July 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28594308/atrazine-chlorpyrifos-and-iprodione-effect-on-the-biodiversity-of-bacteria-actinomycetes-and-fungi-in-a-pilot-biopurification-system-with-a-green-cover
#6
Sebastian Elgueta, Arturo Correa, Marco Campo, Felipe Gallardo, Dimitrios Karpouzas, Maria Cristina Diez
The use of biopurification systems can mitigate the effects of pesticide contamination on farms. The primary aim of this study was to evaluate the effect of pesticide dissipation on microbial communities in a pilot biopurification system. The pesticide dissipation of atrazine, chlorpyrifos and iprodione (35 mg kg(-1) active ingredient [a.i.]) and biological activity were determined for 40 days. The microbial communities (bacteria, actinomycetes and fungi) were analyzed using denaturing gradient gel electrophoresis (DGGE)...
June 8, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28586286/optimization-of-a-methodology-for-the-simultaneous-determination-of-deltamethrin-permethrin-and-malathion-in-stored-wheat-samples-using-dispersive-liquid-liquid-microextraction-with-solidification-of-floating-organic-drop-and-hplc-uv
#7
Meghdad Pirsaheb, Mansour Rezaei, Nazir Fattahi, Mohammad Karami, Kiomars Sharafi, Hamid R Ghaffari
The purpose of this study was to investigate common pesticides in stored wheat at Kermanshah province's silos in Iran. A simple, inexpensive, reliable and environmentally friendly method based on dispersive liquid-liquid microextraction with solidification of floating organic drop was developed. The analytical characteristics of the method were determined. Also, various parameters such as the materials of the silos, types of ownerships of the silos, geographic orientation of silo locations and climatic conditions of silo locations on pesticide residues in studied wheat samples were investigated...
June 6, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28586282/remediation-capacity-of-cd-and-pb-ions-by-mycelia-of-imleria-badia-laetiporus-sulphureus-and-agaricus-bisporus-in-vitro-cultures
#8
Agata Kryczyk, Joanna Piotrowska, Magdalena Sito, Katarzyna Sulkowska-Ziaja, Konrad Dobosz, Włodzimierz Opoka, Bożena Muszyńska
The goal of this study was to evaluate cadmium and lead accumulation ability of in vitro cultures biomass containing selected edible mushroom species derived from the environment (Laetiporus sulphureus, Imleria badia) and those of commercial origin (Agaricus bisporus). Atomic absorption spectrometry was used to evaluate the content of Cd(II) and Pb(II) on the medium supplemented with Cd(II) or Pb(II), each of them at the same concentration of 5·10(-5) M. The highest concentration of Cd(II) ions was determined in the biomass from L...
June 6, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28586277/pilot-scale-biopesticide-production-by-bacillus-thuringiensis-subsp-kurstaki-using-starch-industry-wastewater-as-raw-material
#9
Adama Ndao, Balasubramanian Sellamuthu, Jean R Gnepe, Rajeshwar D Tyagi, Jose R Valero
Pilot-scale Bacillus thuringiensis based biopesticide production (2000 L bioreactor) was conducted using starch industry wastewater (SIW) as a raw material using optimized operational parameters obtained in 15 L and 150 L fermenters. In pilot scale fermentation process the oxygen transfer rate is a major limiting factor for high product yield. Thus, the volumetric mass transfer coefficient (KLa) remains a tool to determine the oxygen transfer capacity [oxygen utilization rate (OUR) and oxygen transfer rate (OTR)] to obtain better bacterial growth rate and entomotoxicity in new bioreactor process optimization and scale-up...
June 6, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28494222/distribution-and-incorporation-mode-of-the-herbicide-mcpa-in-soil-derived-organo-clay-complexes
#10
Patrick Riefer, Timm Klausmeyer, Burkhard Schmidt, Andreas Schäffer, Jan Schwarzbauer
The incorporation of xenobiotics into soil, especially via covalent bonds or sequestration has a major influence on the environmental behavior including toxicity, mobility, and bioavailability. The incorporation mode of 4-chloro-2-methylphenoxyacetic acid (MCPA) into organo-clay complexes has been investigated under a low (8.5 mg MCPA/kg soil) and high (1000 mg MCPA/kg soil) applied concentration, during an incubation period of up to 120 days. Emphasis was laid on the elucidation of distinct covalent linkages between non-extractable MCPA residues and humic sub-fractions (humic acids, fulvic acids, and humin)...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28494209/antibiotic-resistance-virulence-factors-and-biofilm-formation-ability-in-escherichia-coli-strains-isolated-from-chicken-meat-and-wildlife-in-the-czech-republic
#11
Silvie Pavlickova, Anja Klancnik, Magda Dolezalova, Sonja Smole Mozina, Ivan Holko
Attachment of pathogenic bacteria to food contact surfaces and the subsequent biofilm formation represent a serious threat for the food industry, since these bacteria are more resistant to antimicrobials or possess more virulence factors. The main aim of this study was to investigate the correlation between antibiotic resistance against 13 antibiotics, distribution of 10 virulence factors and biofilm formation in 105 Escherichia coli strains according to their origin. The high prevalence of antibiotic resistance that we have found in wildlife isolates could be acquired by horizontal transfer of resistance genes from human or domestic or farm animals...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28494204/bio-and-toxic-elements-in-mushrooms-from-the-city-of-ume%C3%A3-and-outskirts-sweden
#12
Małgorzata Mędyk, Małgorzata Grembecka, Justyna Brzezicha-Cirocka, Jerzy Falandysz
Edible mushrooms (Albatrellus ovinus, Boletus edulis, Clitocybe odora, Gomphidius glutinosus, Leccinum scabrum, Leccinum versipelle, Lycoperdon perlatum, Suillus bovinus, Suillus luteus, and Xerocomus subtomentosus) collected from unpolluted areas of the city of Umeå and its outskirts in the northern part of Sweden were examined for contents of toxic metallic elements (Cd, Pb, and Ag) and essential macro- and microelements (K, Na, Ca, Mg, Cu, Fe, Mn, and Zn) using a validated method and a final measurement by flame atomic absorption spectroscopy (F-AAS)...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28494203/carbofuran-degraded-by-iron-doped-anatase-weakening-the-cholinesterase-inhibitory-activity-in-the-photoproducts-mixture
#13
Martín M Dávila-Jiménez, María P Elizalde-González, Esmeralda García-Díaz, Miguel González, M E Mendoza, M J Robles-Águila
Carbofuran is a toxic carbamate pesticide, and its use has increased in recent years. While marketing information indicates stability in different chemical media, carbofuran exhibits relative photolability. The aim of this research was to decompose carbofuran and to identify the photoproducts achieved when two different doped titania photocatalysts were employed under UV irradiation. The iron-doped TiO2 materials were obtained (a) via a hydrothermal method and (b) by an ultrasound-assisted sol-gel method. The precursors were TiOSO4⋅xH2O and Fe3(NO3)·9H2O...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28494194/17%C3%AE-estradiol-mineralization-under-field-and-laboratory-incubations
#14
Annemieke Farenhorst, Inoka Amarakoon, Lindsey Andronak
Mineralization studies of natural steroid hormones (e.g., 17β-estradiol, E2) are performed in environmental incubators, usually under a constant temperature such as 20°C. In this paper, we present a microcosm protocol that quantified the mineralization of E2 in soils under field temperatures. The nine agricultural soils tested had a wide range of soil organic carbon (1.1 to 5.2%) and clay (9 to 57%) contents. The calculated time over which half of the applied E2 was mineralized (E2-½) ranged from 299 to 910 d, and total E2 mineralization at 48 d (E2-TOT48) ranged from 4 to 13%...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28489978/sodium-bisulfate-and-a-sodium-bisulfate-tannin-mixture-decreases-ph-when-added-to-an-in-vitro-incubated-poultry-cecal-or-fecal-contents-while-reducing-salmonella-typhimurium-marker-strain-survival-and-altering-the-microbiome
#15
Peter M Rubinelli, Sun Ae Kim, Si Hong Park, Stephanie M Roto, Steven C Ricke
The objective of the present study was to investigate the ability of animal feed-grade sodium bisulfate (SBS) and a mixture of sodium bisulfate/tannin to inhibit the growth of Salmonella using an anerobic in vitro mixed cecal culture to mimic the conditions within the chicken cecum. An initial inoculum of Salmonella Typhimurium was introduced to an anerobic dilution solution containing 1/3000 diluted cecal bacteria and solids consisting of ground chicken feed and different percentages of solid SBS or SBS/tannin, and surviving organisms were enumerated...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28489977/distribution-of-pesticide-residues-in-soil-and-uncertainty-of-sampling
#16
Gabriela K Suszter, Árpád Ambrus
Pesticide residues were determined in about 120 soil cores taken randomly from the top 15 cm layer of two sunflower fields about 30 days after preemergence herbicide treatments. Samples were extracted with acetone-ethyl acetate mixture and the residues were determined with GC-TSD. Residues of dimethenamid, pendimethalin, and prometryn ranged from 0.005 to 2.97 mg/kg. Their relative standard deviations (CV) were between 0.66 and 1.13. The relative frequency distributions of residues in soil cores were very similar to those observed in root and tuber vegetables grown in pesticide treated soils...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28489976/testing-the-efficiency-of-extraction-of-incurred-residues-from-soil-with-optimized-multi-residue-method
#17
Gabriella K Suszter, Árpád Ambrus
The reproducibility of extraction of residues from spiked soil samples and from soils containing incurred residues was tested with (14)C-labeled test compounds of different physical-chemical properties. Nearly 100% of the compounds added to the sample before extraction could be recovered with an average reproducibility relative standard deviation (CV) of 5.4%. The additional steps of the determination process (cleanup, evaporation, etc.) contributed to the major part of the variability of the results (CV = 10-20%)...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28489970/photostability-study-of-cis-configuration-neonicotinoid-insecticide-cycloxaprid-in-water
#18
Shuang Hou, Yingying Zhuang, Yayun Deng, Xiaoyong Xu
Cycloxaprid (CYC) is a new cis-configuration neonicotinoid insecticide, which is currently under development in China for agricultural pest control. Considering the photodegradation of CYC is important for the application of CYC in the future, the photochemical behavior of CYC in aqueous solution was herein investigated in a "merry-go-round" reactor under a 300 W high-pressure mercury lamp. Twenty-five photodegradation products were identified via UPLC-TOF-ESI-MS/MS. The results suggested that NTN32692, the precursor of CYC was the predominant photodegradation product...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28489966/acrylamide-induced-disturbance-of-the-redox-balance-in-the-chick-embryonic-brain
#19
Marta Batoryna, Marcin Lis, Grzegorz Formicki
This study was undertaken to determine the redox balance in the developing brain after exposure to acrylamide (ACR), a potent neurotoxin. The studies were performed using an in ovo chick embryo model. The antioxidant enzymes SOD, GPx, CAT, and reduced glutathione (GSH) were used as indicators of the redox balance. Eggs were injected with ACR doses of 40 mg kg(-1) egg mass (2.4 mg egg(-1)) on embryonic day 17 (E17). The activity of the antioxidant enzymes and the concentration of GSH were measured at E17, E18, and E19 in the medulla oblongata, cerebrum, cerebellum, and optic lobe...
August 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28541776/enantioselective-apoptosis-and-oxidative-damage-induced-by-individual-isomers-of-profenofos-in-primary-hippocampal-neurons
#20
Xian T Lu, Yun Ma, Hang J Zhang, Mei Q Jin, Jun H Tang
The purpose of this study was to investigate the apoptosis-related cytotoxic effects and molecular mechanisms of individual isomers of profenofos (PFF) on primary hippocampal neurons at 1.0 to 20 mg L(-1). The cell viability and lactate dehydrogenase (LDH) efflux indicated that (-)-PFF exposure was associated with more toxic effects than (+)-PFF above the concentration of 5 mg L(-1) (P < 0.5). Flow cytometric results showed that the percentages of apoptotic cells incubated with 20 mg L(-1) (-)-PFF, (+)-PFF and rac-PFF for 24 h reached 23...
July 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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