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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/30407105/synthesis-and-characterization-of-antibacterial-bio-nano-films-for-food-packaging
#1
Gülay Baysal, Burç Yilmaz Çelik
This study prepared antibacterial nanocomposite films for food packaging from Montmorillonite, which was modified by quaternary ammonium salts such as cetyltrimethylammonium bromide (CT), hexadecyl-tributyl phosphonium bromide (HD) and corn starch (CS). After this, it determined the antimicrobial activity of CS nanofilms against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria. Dispersion of silicate layers and starch nanocomposite films was analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM), and the results indicated that presence of quaternary ammonium salts enhanced clay dispersion, and the starch films incorporated with quaternary ammonium salts would provide potential use in food packaging as nanostructural materials...
November 8, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30406723/pressurized-liquid-extraction-of-six-tetracyclines-from-agricultural-soils
#2
Inna E Popova, Matthew J Morra, Sanjai J Parikh
Veterinary antibiotics used in agriculture can be introduced into the environment through land application of animal manure, accumulating in soils and groundwaters and posing a significant risk to human health and animal well-being. As the analysis of tetracyclines in soil is challenging due to their strong interaction with soil minerals and organic carbon, the objective of this study was to develop a reliable and reproducible method for quantitative analysis of chlortetracycline and oxytetracycline, and their respective metabolites in soils...
November 8, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30388922/inorganic-elemental-concentrations-in-birch-bolete-mushroom-leccinum-scabrum-and-top-soil-contamination-profiles-bioconcentation-and-annual-variations
#3
Małgorzata Mędyk, Bommanna Loganathan, Leszek Bielawski, Jerzy Falandysz
Analysis of inorganic and organic contaminants in foodstuffs aids in understanding the human exposure to these compounds via consumption. In this study, an edible mushroom species (Leccinum scabrum) and top soil samples were analysed for essential and toxic substances including phosphorus and inorganic elements over a period of three fruiting seasons. Analysis of silver (Ag), aluminium (Al), barium (Ba), calcium (Ca), cadmium (Cd), cobalt (Co), copper (Cu), iron (Fe), mercury (Hg), potassium (K), magnesium (Mg), manganese (Mn), sodium (Na), nickel (Ni), phosphorus (P), lead (Pb), rubidium (Rb), strontium (Sr) and zinc (Zn) in mushrooms and topsoil were performed using inductively coupled plasma optical emission spectroscopy (ICP-OES) with ultrasonic cross flow nebulizer...
November 2, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30376404/sorption-of-radiolabelled-glyphosate-on-biochar-aged-in-contrasting-soils
#4
Aman D Sharma, Donna Lai
Glyphosate mobility from terrestrial to aquatic environments has raised concerns about it. Utilizing soil's inherent properties along with sorption properties of aged biochar, we hypothesized that selective application of biochar would be more effective in economic terms for glyphosate sorption on contrasting soils. To test this hypothesis, batch experiments and liquid scintillation counting for 14 C labeled glyphosate were used. The sorption behavior of glyphosate was examined in four contrasting Australian soil types (Oxisol, Vertisol, Entisol, and Inceptisol) amended with aged biochar to determine glyphosate concentrations by measuring 14 C activity using liquid scintillation counting...
October 30, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30325268/direct-electrochemical-detection-of-glyphosate-at-carbon-paste-electrode-and-its-determination-in-samples-of-milk-orange-juice-and-agricultural-formulation
#5
Pâmela C Oliveira, Elizabete M Maximiano, Poliane A Oliveira, Junior S Camargo, Antonio R Fiorucci, Gilberto J Arruda
This paper describes a simple, inexpensive, highly sensitive, selective, and efficient electrochemical method to determine glyphosate (GLY) in samples of milk, orange juice, and agricultural formulation. The oxidation reaction on the electrode surface was electrochemically characterised by cyclic voltammetry (CV) and square wave voltammetry (SWV). The investigation of GLY at carbon paste electrode revealed a non-reversible oxidation peak at +0.95 V versus Ag/AgCl, which was used for electrochemical detection of GLY...
October 16, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30285582/koh-modified-thevetia-peruviana-shell-activated-carbon-for-sorption-of-dimethoate-from-aqueous-solution
#6
Williams Etuk Ndifreke, Nur Pasaoglulari Aydinlik
Modified Thevetia peruviana shell activated carbon for sorption of dimethoate from aqueous solution derived with potassium hydroxide (KOH) was studied at different concentrations for its potential application in water treatment. The batch sorption was investigated using dimethoate solution of 10-100 mg/L concentrations. Proximate analysis was determined and changes on the surfaces and structure of the TPS were characterized after chemical activation with KOH using XRD, FTIR, SEM-EDAX, pHpzc , BET. The quantum chemical calculation for dimethoate yielded molecule associated energies of -9...
October 4, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30285550/comparison-of-the-photodegradation-of-imazethapyr-in-aqueous-solution-on-epicuticular-waxes-and-on-intact-corn-zea-mays-and-soybean-glycine-max-leaves
#7
Scott C Anderson, Linh Chu, Chandra Bouma, Logan Beukelman, Rayna McLouth, Evan Larson, Amanda M Nienow
A direct, controlled comparison of the photodegradation of imazethapyr has been made between imazethapyr in aqueous solutions, imazethapyr on the surface of epicuticular waxes of corn and soybean plants, and imazethapyr on the surface of intact corn and soybean plant leaves. In some experiments, the imazethapyr solutions were allowed to evaporate partially or fully after application to better model environmental conditions. The photodegradation of imazethapyr was fastest in aqueous solutions (k = 0.16 ± 0...
October 4, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30285549/kinetics-and-isotherm-modeling-of-azoxystrobin-and-imidacloprid-retention-in-biomixtures
#8
Anu Kumari, Abhishek Mandal, Neera Singh
The paper reports the kinetics and adsorption isotherm modeling for imidacloprid (IMIDA) and azoxystrobin (AZOXY) in rice straw (RS)/corn cob (CC) and peat (P)/compost (C) based biomixtures. The pseudo-first-order (PFO), pseudo-second-order (PSO), Elovich and intraparticle diffusion models were used to describe the kinetics. The adsorption data were subjected to the Langmuir and the Freundlich isotherms. Results (r2 Adj values) suggested that the modified Elovich model was the best suited to explain the kinetics of IMIDA sorption while different models explained AZOXY sorption kinetics in different biomixtures (PFO in RS + C and RS + P; PSO in CC + P and Elovich in CC + C)...
October 4, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30265183/effects-of-repeated-fumonisin-b-1-exposure-on-markers-of-oxidative-stress-in-liver-kidneys-and-lungs-of-c57bl-6-mice
#9
Micheli Dassi, Naiéli S Souto, Ana C M Braga, Mayara L Freitas, Clarissa Vasconcelos, Mauro S Oliveira, Ana F Furian
Fu monisin B1 (FB1 ) is a mycotoxin commonly found in maize and maize-based products. Ingestion of FB1 -contaminated causes a myriad of dose- and species-dependent toxic effects to human and animal health. In the present study we evaluated the effects of FB1 (8 mg/kg, i.p. for 4 days) on body weight and oxidative stress parameters in the liver, kidney and lung of C57BL/6 male mice. No changes in the organ-to-body weight ratio, organ-to-adrenal gland weight ratio or organ-to-brain weight ratio were found...
September 28, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199345/growth-photosynthesis-and-removal-responses-of-the-cyanobacteria-chroococcus-sp-to-malathion-and-malaoxon
#10
Karina Martínez-Aguilar, Ignacio Alejandro Pérez-Legaspi, Eustacio Ramírez-Fuentes, Ma Nieves Trujillo-Tapia, Luis Alfredo Ortega-Clemente
Malathion is an organophosphorus pesticide widely used in agricultural crops, despite its toxicity. In addition, malaoxon occurs by oxidation of malathion being more toxic. The toxic effects of malathion and malaoxon in humans include hepatoxicity, breast cancer, genetic damage and endocrine disruption. The aim of this study involved assessing the effect of malathion commercial grade on Chroococcus sp., and its potential as an alternative to the removal of this pesticide and its transformation product such as malaoxon...
September 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199334/dissipation-and-translocation-of-saisenxin-in-tobacco-and-soil-under-conventional-field-and-controlled-laboratory-conditions
#11
Dan D Wang, Kun M Zheng, Xiao Q Li, Yu P Zhang, Ling Z Chen, De Y Hu
The aim of this investigation was to investigate the fate and translocation characteristics of saisenxin (SSX), a novel organic zinc fungicide, in the environment and tobacco plants under conventional field and laboratory conditions. A rapid and sensitive analytical technique based on high-performance liquid chromatography was used for determination of SSX, in soil samples and tobacco leaf, stem and root samples. The method had satisfactiry linearity (R2  = 0.9999) and the limits of detection and of quantitation of the target compound were 0...
September 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199326/effect-of-ozonization-in-degradation-of-trifluralin-residues-in-aqueous-and-food-matrices
#12
Maria A L Milhome, Lucélia K de Lima, Crisiana de A Nobre, Francisco de A F Lima, Ronaldo F do Nascimento
This study investigates the oxidation of trifluralin residues during ozonation in aqueous and food matrices (tomato). Domestic ozonation equipment with average production of 23.9 mg O3  L-1  h-1 was used in the tests. Modern chromatographic systems (SPME-GC-IT/MS/MS and QuEChERS-GC-IT/MS/MS) were applied for extraction and detection of trifluralin residue in fortified samples of ultrapure water, tap water, superficial water and tomato fruit. The samples were submitted to the ozonation process during 0, 5, 10 and 20 min...
September 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199321/microwave-enhanced-advanced-oxidation-treatment-of-dairy-manure
#13
I Tunile, A Srinivasan, P H Liao, K V Lo
The microwave enhanced advanced oxidation process (MW-AOP) was used to treat dairy manure in a continuous-flow 915 MHz microwave wastewater treatment system. The treatment efficiency increased with an increase in temperature, as well as hydrogen peroxide dosage. The settling property was also improved in all treated sets, regardless of temperature applied. The system operated at temperatures >100 °C had a much higher soluble chemical oxygen demand than at temperatures <100 °C. The highest soluble carbonaceous compounds, orthophosphate and ammonia were obtained at 110 °C and 0...
September 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199320/levels-of-organochlorine-pesticides-in-amazon-turtle-podocnemis-unifilis-in-the-xingu-river-brazil
#14
Marina Teófilo Pignati, Larissa Costa De Souza, Rosivaldo de Alcântara Mendes, Marcelo de Oliveira Lima, Wanderlei Antonio Pignati, Juarez Carlos Brito Pezzuti
Due to the toxicity and high environmental persistence of organochlorine pesticides in aquatic organisms, turtles have been studied as environment biomonitors. These animals are important sources of protein for the riverside and indigenous peoples of the Brazilian amazon. In the present study, organochlorine pesticide contamination was investigated in Podocnemis unifilis. Liver, muscle and fatty tissue samples were removed from 50 specimens collected from five sampling points located in the Xingu River basin...
September 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199317/identification-and-comprehensive-evaluation-of-a-novel-biocontrol-agent-bacillus-atrophaeus-jzb120050
#15
Mi Ni, Qiong Wu, Junli Wang, Wei C Liu, Jian H Ren, Dian P Zhang, Juan Zhao, DE W Liu, Ying H Rao, Cai G Lu
Bacillus spp. have long been used as biocontrol agents because of their efficient broad-spectrum antimicrobial activity. We identified a novel strain of Bacillus atrophaeus, named JZB120050, from soil. B. atrophaeus JZB120050 had a strong inhibitory effect against Botrytis cinerea and many other phytopathogens. Gas chromatography-mass spectrometry showed that B. atrophaeus JZB120050 produced many secondary metabolites, such as alkanes, alkenes and acids; some of which were related to pathogen inhibition. Enzyme activity analysis showed that B...
September 10, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/30199316/the-effect-of-adaptation-of-lactobacillus-amylovorus-to-increasing-concentrations-of-sweet-potato-starch-on-the-production-of-lactic-acid-for-its-potential-use-in-the-treatment-of-cannery-waste
#16
Winifred Akoetey, Ruben Morawicki
Lactobacillus amylovorus, an amylolytic species, was cultured in increasing concentrations of sweet potato starch to test the effect of this progressive acclimation on lactic acid production. This research is part of a project on the use of the waste stream from a sweet potato cannery to produce lactic acid. The media used for this acclimation was a modified version of the de Man, Rogosa and Sharpe medium, in which glucose was partially or totally substituted with sweet potato starch. The process was done in five steps, starting with 100% glucose in the first step and ending with 100% sweet potato starch in the last one...
September 10, 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...
August 3, 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...
August 3, 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...
August 3, 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...
August 3, 2018: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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