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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/29227209/simultaneous-determination-of-organochlorine-and-pyrethriod-pesticide-residues-in-the-chinese-patent-medicines-by-gas-chromatography-tandem-mass-spectrometry
#1
Xue J Mao, Yao Zhong, Ai P Yan, Bin Wang, Yuan X Wang, Yi Q Wan
A simple, sensitive, reliable method was developed for the simultaneous determination of organochlorine and pyrethriod pesticide residues in Chinese patent medicines Six ingredient rehmannia pills and Xiaoyao pills. These pesticides were extracted by ethyl acetate. The extraction time and volume of ethyl acetate were optimized. Cleanup of extracts was performed with dispersive-solid phase extraction using graphitized carbon black as the sorbent. The determination of pesticides in the final extracts was carried out by gas chromatography-tandem mass spectrometry in multiple reaction monitoring mode (GC-MS/MS, MRM)...
December 11, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29227191/racemic-r-and-s-tebuconazole-altered-chitinase-and-chitobiase-activity-of-daphnia-magna
#2
Suzhen Qi, Xue Liu, Lizhen Zhu, Xiaofeng Chen, Chengju Wang
Tebuconazole is a chiral trizole fungicide and widely used in many crops for controlling disease. Tebuconazole is potential toxic to some aquatic organisms but relative information of its isomers is scarce. To detect the endocrine disrupting effects and difference of rac-, R-, and S-tebuconazole, the chitinase activity in Daphnia magna and chitobiase activity in each test medium were used as biomonitors after a 14-day exposure. Results showed that chitinase activity was significantly reduced by rac-, R-, and S-tebuconazole...
December 11, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29227190/determination-of-propineb-and-its-metabolites-propylenethiourea-and-propylenediamine-in-banana-and-soil-using-gas-chromatography-with-flame-photometric-detection-and-lc-ms-ms-analysis
#3
Shiming Song, Jie Wei, Zhaojie Chen, Yuhao Lei, Yan Zhang, Cheng Deng, Huihua Tan, Xuesheng Li
A sensitive and specific method for the determination of propineb and its metabolites, propylenethiourea (PTU) and propylenediamine (PDA), using gas chromatography with flame photometric detection (GC-FPD) and LC-MS/MS was developed and validated. Propineb and its metabolite residue dynamics in supervised field trials under Good Agricultural Practice (GAP) conditions in banana and soil were studied. Recovery of propineb (as CS2), PDA and PTU ranged from 75.3 to 115.4% with RSD (n = 5) of 1.3-11.1%. The limit of quantification (LOQ) of CS2, PDA and PTU ranged from 0...
December 11, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29215952/easy-and-fast-extraction-methods-to-determine-organochlorine-pesticides-in-sewage-sludge-soil-and-water-samples-based-at-low-temperature
#4
Tayane C R Mesquita, Rizia R Santos, Ane P Cacique, Ludimara J De Sá, Flaviano O Silvério, Gevany P Pinho
Organochlorine pesticides present in sewage sludge can contaminate soil and water when they are used as either fertilizer or agricultural soil conditioner. In this study, the technique solid-liquid extraction with low temperature purification was optimized and validated for determination of ten organochlorine pesticides in sewage sludge and soil samples. Liquid-liquid extraction with low temperature purification was also validated for the same compounds in water. Analyses were performed by gas chromatography-mass spectrometry operating in the selective ion monitoring mode...
December 7, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29206083/tropical-surface-water-quality-studies-implications-for-the-aquatic-fate-of-n-methyl-carbamate-pesticides
#5
Bao Ha, Leili Zamini, Jeremy Monn, Samuel Njoroge, Laban Thimo, Maria Ondeti, Jane I Murungi, Clare N Muhoro
Water quality assessment was conducted on the Ruiru River, a tributary of an important tropical river system in Kenya, to determine baseline river conditions for studies on the aquatic fate of N-methyl carbamate (NMC) pesticides. Measurements were taken at the end of the long rainy season in early June 2013. Concentrations of copper (0.21-1.51 ppm), nitrates (2.28-4.89 ppm) and phosphates (0.01-0.50 ppm) were detected at higher values than in uncontaminated waters, and attributed to surface runoff from agricultural activity in the surrounding area...
December 5, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29173073/in-vivo-assessment-of-plant-extracts-for-control-of-plant-diseases-a-sesquiterpene-ketolactone-isolated-from-curcuma-zedoaria-suppresses-wheat-leaf-rust
#6
Jae Woo Han, Sang Hee Shim, Kyoung Soo Jang, Yong Ho Choi, Quang Le Dang, Hun Kim, Gyung Ja Choi
As an alternative to synthetic pesticides, natural materials such as plant extracts and microbes have been considered to control plant diseases. In this study, methanol extracts of 120 plants were explored for in vivo antifungal activity against Rhizoctonia solani, Botrytis cinerea, Phytophthora infestans, Puccinia triticina, and Blumeria graminis f. sp. hordei. Of the 120 plant extracts, eight plant extracts exhibited a disease control efficacy of more than 90% against at least one of five plant diseases. In particular, a methanol extract of Curcuma zedoaria rhizomes exhibited strong activity against wheat leaf rust caused by P...
November 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29173036/determination-and-health-risk-assessment-of-enrofloxacin-flumequine-and-sulfamethoxazole-in-imported-pangasius-catfish-products-in-thailand
#7
Worawat Jansomboon, Suwanna Kitpati Boontanon, Narin Boontanon, Chongrak Polprasert
The goals of this study were to determine the levels of three antibiotics - enrofloxacin, flumequine and sulfamethoxazole - in Pangasius catfish products imported into Thailand and to assess the health risks from consumption. To extract these antibiotic residues, acetonitrile, methanol and a small amount of formic acid were used as solvents. Determination of the antibiotics after extraction steps was carried out by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) technique. The results showed that 14 and 3 samples of Pangasius catfish products were contaminated with enrofloxacin and sulfamethoxazole, respectively...
November 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29172986/bisphenol-a-and-bisphenol-s-release-in-milk-under-household-conditions-from-baby-bottles-marketed-in-italy
#8
Giacomo Russo, Francesco Barbato, Eleonora Cardone, Margherita Fattore, Stefania Albrizio, Lucia Grumetto
A simple and sensitive validated analytical method based on liquid chromatography coupled to tandem fluorescence (FD) and ultraviolet (UV) spectrophotometry was applied to monitor the presence of bisphenol A and bisphenol S in plastic baby bottles marketed in Italy. The limits of detection (LOD) were 3.75 ng mL-1 and 80.00 ng mL-1, and those of quantification (LOQ) were 12.51 ng mL-1 and 260.00 ng mL-1 for BPA (FD detection) and for BPS (UV detection), respectively. BPA was found in only four samples, two samples undergone to microwave heating and two samples undergone to bottle warmer heating either at 40°C or at 80°C...
November 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29172985/impact-of-desiccation-and-heat-exposure-stress-on-salmonella-tolerance-to-acidic-conditions
#9
Kurt E Richardson, Nelson A Cox, Douglas E Cosby, Mark E Berrang
In a recent study, the pH of commonly used Salmonella pre-enrichment media became acidic (pH 4.0 to 5.0) when feed or feed ingredients were incubated for 24 h. Acidic conditions have been reported to injure or kill Salmonella. In this study, cultures of four known feed isolates (S. montevideo, S. senftenberg, S. tennessee, and S. schwarzengrund) and four important processing plant isolates (S. typhimurium, S. enteritidis, S. infantis, and S. heidelberg) were grown on meat and bone meal and later subjected to desiccation and heat exposure to stress the microorganism...
November 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29172968/the-sensitivity-of-soil-enzymes-microorganisms-and-spring-wheat-to-soil-contamination-with-carfentrazone-ethyl
#10
Monika Tomkiel, Małgorzata Baćmaga, Agata Borowik, Jadwiga Wyszkowska, Jan Kucharski
Herbicides pose a significant threat to the natural environment, in particular in soils that are most exposed to plant protection agents. Prolonged herbicide use leads to changes in soil metabolism and decreases soil productive potential. In this study, the influence of carfentrazone-ethyl (CE) on the microbiological and biochemical properties of soil and the yield of Triticum aestivum L. was evaluated. Carfentrazone-ethyl was applied to sandy loam (pHKCl - 7.0) in doses of 0.000, 0.264, 5.280, 10.56, 21.18, 42...
November 27, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29157091/corrigendum
#11
(no author information available yet)
No abstract text is available yet for this article.
November 20, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29148925/degradation-of-chlordecone-and-beta-hexachlorocyclohexane-by-photolysis-photo-fenton-oxidation-and-ozonation
#12
Germán Cruz-González, Carine Julcour, Hélène Chaumat, Valérie Bourdon, Felipe Ramon-Portugal, Sarra Gaspard, Ulises J Jáuregui-Haza, Henri Delmas
Intensive use of chlorinated pesticides from the 1960s to the 1990s has resulted in a diffuse contamination of soils and surface waters in the banana-producing areas of the French West Indies. The purpose of this research was, for the first time, to examine the degradation of two of these persistent pollutants - chlordecone (CLD) and beta-hexachlorocyclohexane (β-HCH) in 1 mg L(-1) synthetic aqueous solutions by means of photolysis, (photo-) Fenton oxidation and ozonation processes. Fenton oxidation is not efficient for CLD and yields less than 15% reduction of β-HCH concentration in 5 h...
November 17, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29131711/aerobic-treatment-of-swine-manure-to-enhance-anaerobic-digestion-and-microalgal-cultivation
#13
Dominic Bekoe, Lijun Wang, Bo Zhang, Matthew Scott Todd, Abolghasem Shahbazi
Aerobic treatment of swine manure was coupled with anaerobic digestion and microalgal cultivation. A 14-day aerobic treatment reduced the total solid content of swine manure by >15%. Ammonia and carbon dioxide were stripped by the air supplied, and this off-gas was further used to aerate the culture of Chlorella vulgaris. The microalgal growth rates in Bristol medium and the wastewater with the off-gas increased from 0.08 to 0.22 g/L/d and from 0.15 to 0.24 g/L/d, respectively. Meanwhile, the aerobically treated swine manure showed a higher methane yield during anaerobic digestion...
November 13, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29111904/optimization-and-characterization-of-the-formation-of-oil-in-water-diazinon-nanoemulsions-modeling-and-influence-of-the-oil-phase-surfactant-and-sonication
#14
Mohamed E I Badawy, Abdel-Fattah S A Saad, El-Sayed H M Tayeb, Sondos A Mohammed, Amany D Abd-Elnabi
Nanoemulsions are particularly suitable as a platform in the development of delivery systems for lipophilic functional agents. Current research describes the formation of oil-in-water (O/W) diazinon nanoemulsions using synthetic and natural additives by adopting a high-energy (ultrasound) emulsification method. The diazinon nanoemulsions were spontaneously formed by adding dropwise a mixture of diazinon, solvent and co-solvent in an aqueous solution containing a surfactant (tween or lecithin) with continuous stirring...
November 7, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29087769/effect-of-green-manure-amendment-on-herbicide-pendimethalin-on-soil
#15
Wen-Ching Chen, Fang-Yu Hsu, Jui-Hung Yen
Manure amendment in agricultural practice can have a large effect on herbicide dissipation because the period of manure plowing is close to the period of herbicide application. In addition, manure amendment is among the frequently encountered options in ameliorating pesticide pollution. In this research, the dissipation of the herbicide pendimethalin was examined after amendment with two common green manures, Lupinus luteus (L) or Cosmos bipinnatus (C), for 110 days in pH 5.2 and 7.7 soils (Sankengtzu [Sk] and Erhlin [Eh] soil, respectively)...
October 31, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29083985/assessing-contamination-of-smoked-sprats-sprattus-sprattus-with-polycyclic-aromatic-hydrocarbons-pahs-and-changes-in-its-level-during-storage-in-various-types-of-packaging
#16
Kamila Kuźmicz, Artur Ciemniak
The analysis of material used in this study demonstrated that the amount of polycyclic aromatic hydrocarbons (PAHs) in smoked sprats varies from the level below the lowest detection limit in muscles up to 9.99 µg kg(-1) of benzo[a]pyrene (BaP) in fish skin. Such a high level of PAHs in skin was reported only in one of six batches of sprats, while mean BaP level was at 1.69 µg kg(-1). Regardless such a high BaP level in skin, its concentration in muscles did not exceed the maximum acceptable level. The study objective was to assess to what extent packaging materials adsorb PAH compounds from food...
October 30, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29083963/the-transfer-of-active-ingredients-of-insecticides-and-fungicides-from-an-orchard-to-beehives
#17
Bartosz Piechowicz, Izabela Woś, Magdalena Podbielska, Przemysław Grodzicki
This investigation was undertaken to determine whether active ingredients (AIs) of currently recommended plant protection products (PPPs) could be transferred to beehives from apple and pear trees. A field trial was carried out with apple trees of Ligol and Idared variety, and pear trees of Conference variety. For pest and diseases control of fungal origin, recommended PPPs were applied. Samples of flowers from the above-mentioned varieties of fruit trees, of bees, brood and honey from beehives located in their direct neighborhood were collected regularly and analyzed for the presence of lambda-cyhalothrin (an insecticide) and cyprodinil, captan, fluopyram, kresoxim-methyl, penthiopyrad and trifloxystrobin (fungicides)...
October 30, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29083954/screening-of-antibiotic-residues-in-fresh-milk-of-kathmandu-valley-nepal
#18
Bal Kumari Sharma Khanal, Muhammad Bilal Sadiq, Manisha Singh, Anil Kumar Anal
The prevalence of two groups of antibiotics; namely penicillin and sulfonamides was studied in fresh milk available in Kathmandu Valley of Nepal. The milk samples (n = 140) were collected from three different sources; individual farmers, cottage dairies and organized dairies of Kathmandu valley. Qualitative and semi-quantitative analysis with rapid screening kits revealed that 23% samples were positive for antibiotic residues in the fresh milk for penicillin and sulfonamide groups (1-256 µg/kg). High performance liquid chromatography (HPLC) analyses detected 81% samples positive for amoxicillin (68-802 µg/kg), 41% for sulfadimethoxine (31-69 µg/kg), 27% for penicillin G (13-353 µg/kg), and 12% for ampicillin (0...
October 30, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29040003/dietary-risk-evaluation-for-28-polycyclic-aromatic-hydrocarbons-pahs-in-tea-preparations-made-of-teas-available-on-the-polish-retail-market
#19
Marek Roszko, Marta Kamińska, Krystyna Szymczyk, Renata Jędrzejczak
The aim of this work was to assess dietary risk resulting from consumption of polycyclic aromatic hydrocarbons (PAHs) with tea infusions. To this end, levels of 28 PAHs in black, green, red and white teas available on the Polish retail market have been assessed. Profiles and correlation between concentrations of individual PAHs have been identified. A model study on transfer of PAHs from tea leaves into tea preparations has been conducted. Relatively high concentrations of 28 evaluated PAHs have been found in 58 tested samples of black, green, red and white teas sampled on the Polish retail market...
October 17, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/29035636/quantification-of-nitrogen-in-the-liquid-fraction-and-in-vitro-assessment-of-lysine-bioavailability-in-the-solid-fraction-of-soybean-meal-hydrolysates
#20
D Luján-Rhenals, R Morawicki, Z Shi, S C Ricke
Soybean meal (SBM) is a product generated from the manufacture of soybean oil and has the potential for use as a source of fermentable sugars for ethanol production or as a protein source for animal feeds. Knowing the levels of nitrogen available from ammonium is a necessary element of the ethanolic fermentation process while identifying the levels of essential amino acids such as lysine is important in determining usage as a feed source. As such the purpose of this study was to quantify total nitrogen and ammonium in the liquid fraction of hydrolyzed SBM and to evaluate total and bioavailable lysine in the solid fraction of the hydrolyzed SBM...
October 16, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
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