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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/28976238/the-response-of-soil-arthrobacter-agilis-lush13-to-changing-conditions-transition-between-vegetative-and-dormant-state
#1
Inna P Solyanikova, Nataliya E Suzina, Nataliya S Egozarian, Valentina N Polivtseva, Nataliya V Prisyazhnaya, Galina I El-Registan, Andrey L Mulyukin, Ludmila A Golovleva
This work was aimed at studying the response of soil non-spore-forming actinobacterial strain Arthrobacter agilis Lush 13 to changing natural conditions, such as nutrient availability and the presence of degradable and recalcitrant aliphatic and aromatic substrates. The A. agilis strain Lush13 was able to degrade octane, nonane, hexadecane, benzoate, phenol, and 2,3-, 2,4-, 2,5-, 2,6-dichlorophenols, but not grew on 3,4-dichlorophenol, 2,3,4-, 2,4,5-, 2,4,6-trichlorophenol (TCP), pentachlorophenol (PCP), 2-chlorobenzoate, 3-chlorobenzoate, 3,5-dichlorobenzoate, 2,4-dichlorobenzoate...
October 4, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28961057/sorption-and-desorption-of-glyphosate-mcpa-and-tetracycline-and-their-mixtures-in-soil-as-influenced-by-phosphate
#2
Sirajum Munira, Annemieke Farenhorst
Phosphate fertilizers and herbicides such as glyphosate and MCPA are commonly applied to agricultural land, and antibiotics such as tetracycline have been detected in soils following the application of livestock manures and biosolids to agricultural land. Utilizing a range of batch equilibrium experiments, this research examined the competitive sorption interactions of these chemicals in soil. Soil samples (0-15 cm) collected from long-term experimental plots contained Olsen P concentrations in the typical (13 to 20 mg kg(-1)) and elevated (81 to 99 mg kg(-1)) range of build-up phosphate in agricultural soils...
September 29, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28956709/pesticide-residue-removal-in-classic-domestic-processing-of-tomato-and-its-effects-on-product-quality
#3
Alessandra A Z Rodrigues, Maria Eliana L R De Queiroz, André Fernando De Oliveira, Antônio Augusto Neves, Fernanda F Heleno, Laércio Zambolim, Jéssika F Freitas, Elisa H Costa Morais
This study was undertaken to evaluate the effectiveness of several household practices (washing with water or acidic, alkaline, and oxidizing solutions, and peeling) in minimizing pesticide residue contamination of tomatoes, as well as the impact on the quality of the treated fruit. Tests were performed using two systemic fungicides (azoxystrobin and difenoconazole) and one contact fungicide (chlorothalonil). Solid-liquid extraction with low temperature partition (SLE/LTP) and liquid-liquid extraction with low temperature partition (LLE/LTP) were used to prepare the samples for pesticides determination by gas chromatography...
September 28, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28949809/isolation-and-identification-of-3-bromocarbazole-degrading-bacteria
#4
Yun Ma, Zhiwei Li, Mei Yuan, Linhua Chen, Shanshan Zhou
In this study, a bacterial strain, CH-1, capable of degrading 3-bromocarbazole (3-BCZ) was isolated from a polluted soil. Based on its physio-biochemical characteristics and 16S rRNA genes, strain CH-1 was identified as a Stenotrophomonas sp. Strain CH-1 was able to degrade 70% of 50 mg/L 3-BCZ within 8 d at pH 7.0 and 30°C in mineral salt medium (MSM). During the process, the main intermediate metabolite was identified as (2E, 4Z)-6-(2-amino-5-bromophenyl)-2-hydroxy-6-oxhexa-2, 4-dienoic by gas (2E, 4Z)-6-(2-amino-5-bromophenyl)-2-hydroxy-6-oxhexa-2,4-dienoic via gas chromatograph-mass spectrometry (GC-MS) analysis...
September 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28949807/pesticide-dispersion-by-spraying-under-tropical-conditions
#5
Tomaz Langenbach, Denise Mano, Maize M Campos, Alessandra L M C Cunha, Tácio M P De Campos
Pesticide air pollution by spraying was evaluated under different temperature, humidity and wind climatic conditions in Brazil. Field experiments were performed with application towards the soil and in guava orchards, where spray dispersion was monitored by adding p-aminobenzoic acid (PABA), a fluorescent substance, as a tracer to the water contained in the spray tanks. Samples were collected with filter membranes (Whatman 180025), and the PABA was extracted from the filters by shaking with water in a Petri dish and measured in a spectrofluorometer...
September 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28949805/ivermectin-dissipation-and-movement-from-feces-to-soil-under-field-conditions
#6
Lucía Emilia Iglesias, Carlos Saumell, Federica Sagüés, Juan Manuel Sallovitz, Adrián Luis Lifschitz
The aim of this work was to evaluate the fate of ivermectin (IVM) at two concentrations in cattle feces and its movement to the nearby soil and plants. Feces were spiked with IVM at two levels: 3000 ng g(-1) (high group, HG) and 300 ng g(-1) (low group, LG). Artificial dung pats were prepared and deposited in an experimental field area. Feces and underlying soil were sampled up to 60 days post-deposition (dpd). As an additional analysis, grasses growing around the pats were sampled at 30 and 60 dpd. Ivermectin concentrations in all matrices were determined by HPLC...
September 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28949803/enterotoxin-production-and-antimicrobial-susceptibility-in-staphylococci-isolated-from-traditional-raw-milk-cheeses-in-serbia
#7
Snezana Bulajic, Svetlana Colovic, Dusan Misic, Jasna Djordjevic, Radoslava Savic-Radovanovic, Jelena Asanin, Tijana Ledina
This study was undertaken to determine the prevalence of coagulase positive staphylococci (CPS) by examining a total of 71 raw milk cheeses. Additionally, enterotoxigenicity, antimicrobial susceptibility and the presence of mecA and mecC genes in the staphylococcal isolates were investigated. The isolation and enumeration procedure of CPS followed the International Organization for Standardization (ISO) standard. The presumptive staphylococci were identified by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) using the VITEK MS system...
September 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28949798/effect-of-processing-on-the-disappearance-of-pesticide-residues-in-fresh-cut-lettuce-bioavailability-and-dietary-risk
#8
Miguel A Camara, Alberto Barba, Sandra Cermeño, Gracia Martinez, Jose Oliva
The aim of this research is to establish the processing factors of six pesticides durong the preparation of fresh-cut lettuce and to assess the risk of ingestion of pesticide residues associated with the consumption of the same. A field study was carried out on the dissipation of three insecticides (imidacloprid, tebufenozide, cypermethrin) and three fungicides (metalaxyl, tebuconazole, azoxystrobin) during treatment conditions simulating those used for commercial fresh-cut lettuce. A simultaneous residue analysis method is validated using QuEChERS extraction with acetonitrile and CG-MS and LC-MS/MS analysis...
September 26, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28945498/the-influence-of-deoxynivalenol-and-zearalenone-on-steroid-hormone-production-by-porcine-ovarian-granulosa-cells-in-vitro
#9
Adriana Kolesarova, Marina Medvedova, Marek Halenar, Alexander V Sirotkin, Jozef Bulla
Fusarium mycotoxins deoxynivalenol (DON) and zearalenone (ZEA) are frequently occurring in feed of pigs together. The aim of this study was to evaluate the possible in vitro effects of DON and ZEA, alone or their combination on steroid secretion of porcine ovarian granulosa cells (GCs). A species-specific model with porcine ovarian GCs was used to study the potential endocrine disrupting effects of DON and ZEA alone and in co-exposure. Progesterone (P4) and estradiol (E2) were determined by radioimmunoassay (RIA) and enzyme-linked immunosorbent assay (ELISA)...
September 25, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937929/occurrence-and-distribution-of-trifluralin-ethalfluralin-and-pendimethalin-in-soils-used-for-long-term-intensive-cotton-cultivation-in-central-greece
#10
Helen Karasali, George Pavlidis, Anna Marousopoulou, Arpad Ambrus
In the present study, a soil monitoring program was undertaken in Greek cotton cultivated areas in 2012. Twenty-seven soil samples were collected from the entire Thessaly plain in early summer of 2012, corresponding to approximately three months (current use of pendimethalin), up to one year (for the banned ethalfluralin), and three years (for the also banned trifluralin), after the last dinitroaniline application. Low but not negligible levels of dinitroanilines were detected, ranging from 0.01 to 0.21 μg g(-1) d...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937920/biodegradation-of-imidacloprid-in-liquid-media-by-an-isolated-wastewater-fungus-aspergillus-terreus-yesm3
#11
Youssef M M Mohammed, Mohammed E I Badawy
In the present study, a new fungal strain capable of imidacloprid degradation was isolated from agricultural wastewater drain. The fungal strain of YESM3 was identified as Aspergillus terreus based on ITS1-5.8S rDNA-ITS2 gene sequence by PCR amplification of a 500 bp sequence. Screening of A. terreus YESM3 to the insecticide imidacloprid tolerance was achieved by growing fungus in Czapek Dox agar for 6 days at 28°C. High values (1.13 and 0.94 cm cm(-1)) of tolerance index (TI) were recorded at 25 and 50 mg L(-1) of imidacloprid, respectively in the presence and absence of sucrose...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937911/characterization-and-application-of-the-enzyme-peroxidase-to-the-degradation-of-the-mycotoxin-don
#12
Ana Carla P Feltrin, Sabrina De O Garcia, Sergiane S Caldas, Ednei G Primel, Eliana Badiale-Furlong, Jaqueline Garda-Buffon
Deoxynivalenol (DON), one of the main mycotoxins found in food matrices, has high level of toxicity. This study aimed to characterize the peroxidase enzyme extracted from rice bran to be applied to the biodegradation of DON in order to evaluate the potential peroxidase (PO) from rice bran (RB) has to degrade DON in optimal conditions. Purification and recovery factors of PO extracted from RB and purified by three-phase partitioning were 5.7% and 50%, respectively. PO had the highest level of activity in the phosphate buffer 5 mM pH 5...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937880/detection-of-free-microcystins-in-the-liver-and-muscle-of-freshwater-fish-by-liquid-chromatography-tandem-mass-spectrometry
#13
Xiaobin Hu, Jinyun Ye, Rongfei Zhang, Xiang Wu, Yixiang Zhang, Chenglong Wu
MC analysis of biological tissue is considered to be very difficult due to the lack of validated methods. This is the primary limiting factor for monitoring potential risks in both the flesh of aquatic organisms and the aquatic ecosystem. In this study, an effective method to determine free MCs (MC-LR and MC-RR) in the muscle and liver tissues of freshwater cultured fish was developed using solid-phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC/MS-MS). The extraction solvent, time of extraction, eluent and purification of the extract were optimized...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937878/degradation-of-chlorpyrifos-by-an-endophytic-bacterium-of-the-sphingomonas-genus-strain-hjy-isolated-from-chinese-chives-allium-tuberosum
#14
Fayun Feng, Yisong Li, Jing Ge, Jinjin Chen, Wayne Jiang, Shuang He, Xianjing Liu, Xiangyang Yu
The degradation of chlorpyrifos (CP) by an endophytic bacterial strain (HJY) isolated from Chinese chives (Allium tuberosum Rottl. ex Spreng) was investigated. Strain HJY was identified as Sphingomonas sp. based on morphological, physiological, and biochemical tests and a 16S rDNA sequence analysis. Approximately 96% of 20 mg L(-1) CP was degraded by strain HJY over 15 days in liquid minimal salts medium (MSM). The CP degradation rate could also be increased by glucose supplementation. The optimal conditions for the removal of 20 mg L(-1) CP by strain HJY in MSM were 2% inoculum density, pH 6...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937856/detection-of-selected-trace-elements-in-yogurt-components
#15
Marcela Capcarova, Lubos Harangozo, Tomas Toth, Loretta Schwarczova, Alica Bobkova, Robert Stawarz, Alessandra Guidi, Peter Massanyi
The objective of this study was to determine the concentrations of Cu, Cd, Pb, Mn, Cr, Co, Ni, Zn, and Hg in the white and fruit parts of commercially available yogurts (n = 30) from Nitra markets (Slovak Republic). The results were correlated to determine their relationships. Three yogurt fruit flavors were chosen and tested, strawberry (n = 10), blueberry (n = 10), and cherry (n = 10). The elements were analyzed using atomic absorption spectrophotometry. Higher concentrations of toxic elements, such as Cd and Pb, were found in the fruit parts of the yogurt, and in some cases, the tolerable limit was exceeded...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937850/environmental-transport-of-endogenous-dairy-manure-estrogens
#16
Inna E Popova, Matthew J Morra
Although estrogens originating from dairy manure applied to agricultural soils as a fertilizer can potentially contaminate surface water and groundwater, the variables that control transport are poorly understood. Our objective was to assess the potential for off-site movement of endogenous dairy cattle estrogens when manure is applied on fields at agronomically relevant fertilization rates. Estrone (E1), 17α-estradiol (α-E2), and 17β-estradiol (β-E2) were used in laboratory sorption, desorption, and transformation incubations with both manure and an agriculturally relevant soil...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28937847/toxic-interaction-mechanism-of-two-fluoroquinolones-with-serum-albumin-by-spectroscopic-and-computational-methods
#17
Pengfei Qin, Xingren Pan, Rutao Liu, Changwei Hu, Yuliang Dong
To evaluate the toxicity of two fluoroquinolones (FQs), ciprofloxacin (CPFX), and enrofloxacin (ENFX), at the protein level, their binding modes with bovine serum albumin (BSA) were characterized by multiple spectroscopic and molecular docking methods under simulated physiological conditions. On the basis of fluorescence spectra, we concluded that both FQs greatly quenched the fluorescence intensity of BSA, which was attributed to the formation of a moderately strong complex mainly through electrostatic interactions...
September 22, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28934007/herbicidal-activity-of-slow-release-herbicide-formulations-in-wheat-stands-infested-by-weeds
#18
Natalia Zhila, Anastasiya Murueva, Anna Shershneva, Ekaterina Shishatskaya, Tatiana Volova
The present study reports the herbicidal activity of metribuzin and tribenuron-methyl embedded in the degradable matrix of natural poly-3-hydroxybutyrate [P(3HB)/MET and P(3HB)/TBM]. The developed formulations were constructed as films and microgranules, which were tested against the weeds such as white sweet clover Melilotus albus and lamb's quarters Chenopodium album in the presence of soft spring wheat (Triticum aestivum, cv. Altaiskaya 70) as the subject crop for investigation. The activity was measured in laboratory scale experiments by determining the density and weight of the vegetative organs of weeds...
September 21, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28934004/development-of-functional-composts-using-spent-coffee-grounds-poultry-manure-and-biochar-through-microbial-bioaugmentation
#19
S Aalfin Emmanuel, Jangyeon Yoo, Eok-Jo Kim, Jae-Soo Chang, Young-In Park, Sung-Cheol Koh
Spent coffee grounds (SCG), poultry manure, and agricultural waste-derived biochar were used to manufacture functional composts through microbial bioaugmentation. The highest yield of tomato stalk-based biochar (40.7%) was obtained at 450°C with a surface area of 2.35 m(2) g(-1). Four pilot-scale composting reactors were established to perform composting for 45 days. The ratios of NH4(+)-N/NO3(-)-N, which served as an indicator of compost maturity, indicate rapid, and successful composting via microbial bioaugmentation and biochar amendment...
September 21, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28934001/imazethapyr-persistence-in-sandy-loam-detected-using-white-mustard-bioassay
#20
Katarina Jovanović-Radovanov
Field experiments were conducted during two years at Srem region to investigate the influence of meteorological conditions, time and rate of application on soil persistence of imazethapyr in sandy loam type of soil. Imazethapyr was applied PRE- and POST-EM and in both cases in three application rates: 80, 120 and 160 g a.i./ha. Soil samples were collected from the day of herbicide application in predetermined intervals up to one year after application and residual concentrations were determined with a white mustard root bioassay...
September 21, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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