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https://www.readbyqxmd.com/read/28231336/comparison-of-neurological-health-outcomes-between-two-adolescent-cohorts-exposed-to-pesticides-in-egypt
#1
Ahmed A Ismail, Matthew R Bonner, Olfat Hendy, Gaafar Abdel Rasoul, Kai Wang, James R Olson, Diane S Rohlman
Pesticide-exposed adolescents may have a higher risk of neurotoxic effects because of their developing brains and bodies. However, only a limited number of studies have addressed this risk among adolescents. The aim of this study was to compare neurological outcomes from two cohorts of Egyptian adolescents working as pesticide applicators. In 2005 and 2009, two cohorts of male adolescents working as pesticide applicators for the cotton crop were recruited from Menoufia Governorate, Egypt. The same application schedule and pesticides were used at both times, including both organophosphorus, and pyrethroid compounds...
2017: PloS One
https://www.readbyqxmd.com/read/28231067/the-association-of-peripubertal-serum-concentrations-of-organochlorine-chemicals-and-blood-lead-with-growth-and-pubertal-development-in-a-longitudinal-cohort-of-boys-a-review-of-published-results-from-the-russian-children-s-study
#2
Oleg Sergeyev, Jane S Burns, Paige L Williams, Susan A Korrick, Mary M Lee, Boris Revich, Russ Hauser
Organochlorine chemicals and lead are environmental exposures that have endocrine disrupting properties (EDCs) which interfere with many aspects of hormone action. Childhood and adolescence are windows of susceptibility for adverse health effects of EDCs. Our ongoing study, the Russian Children's Study (RCS), is one of the few longitudinal studies investigating the impact of EDCs on growth and puberty in boys. It is conducted in the historically contaminated city of Chapaevsk, in the Samara region. The study focuses on evaluating the associations of persistent organochlorine chemicals and lead with growth and pubertal timing...
February 23, 2017: Reviews on Environmental Health
https://www.readbyqxmd.com/read/28230353/statistical-survey-of-persistent-organic-pollutants-risk-estimations-to-humans-and-wildlife-though-consumption-of-fish-from-u-s-rivers
#3
Angela L Batt, John B Wathen, James M Lazorchak, Anthony R Olsen, Thomas M Kincaid
U.S. EPA conducted a national statistical survey of fish tissue contamination at 540 river sites (representing 82 954 river km) in 2008-2009, and analyzed samples for 50 persistent organic pollutants (POPs), including 21 PCB congeners, 8 PBDE congeners, and 21 organochlorine pesticides. The survey results were used to provide national estimates of contamination for these POPs. PCBs were the most abundant, being measured in 93.5% of samples. Summed concentrations of the 21 PCB congeners had a national weighted mean of 32...
February 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28230074/lack-of-resistance-development-in-bemisia-tabaci-to-isaria-fumosorosea-after-multiple-generations-of-selection
#4
Tianni Gao, Zhaolei Wang, Yü Huang, Nemat O Keyhani, Zhen Huang
The emergence of insecticide resistant insect pests is of significant concern worldwide. The whitefly, Bemisia tabaci, is an important agricultural pest and has shown incredible resilience developing resistance to a number of chemical pesticides. Entomopathogenic fungi such as Isaria fumosorosea offer an attractive alternative to chemical pesticides for insect control, and this fungus has been shown to be an effective pathogen of B. tabaci. Little is known concerning the potential for the development of resistance to I...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229974/molecular-mechanism-of-endosulfan-action-in-mammals
#5
Robin Sebastian, Sathees C Raghavan
Endosulfan is a broad-spectrum organochlorine pesticide, speculated to be detrimental to human health in areas of active exposure. However, the molecular insights to its mechanism of action remain poorly understood. In two recent studies, our group investigated the physiological and molecular aspects of endosulfan action using in vitro, ex vivo and in vivo analyses. The results showed that apart from reducing fertility levels in male animals, Endosulfan induced DNA damage that triggers compromised DNA damage response leading to undesirable processing of broken DNA ends...
March 2017: Journal of Biosciences
https://www.readbyqxmd.com/read/28229382/enhanced-degradation-of-spiro-insecticides-and-their-leacher-enol-derivatives-in-soil-by-solarization-and-biosolarization-techniques
#6
José Fenoll, Isabel Garrido, Nuria Vela, Caridad Ros, Simón Navarro
The leaching potential of three insecticides (spirodiclofen, spiromesifen, and spirotetramat) was assessed using disturbed soil columns. Small quantities of spirodiclofen and spiromesifen were detected in leachate fraction, while spirotetramat residues were not found in the leachates. In addition, the transformation products (enol derivatives) are relatively more mobile than the parent compounds and may leach into groundwater. Moreover, the use of disinfection soil techniques (solarization and biosolarization) to enhance their degradation rates in soil was investigated...
February 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28229138/eawag-soil-in-envipath-a-new-resource-for-exploring-regulatory-pesticide-soil-biodegradation-pathways-and-half-life-data
#7
Diogo A R S Latino, Jörg Wicker, Martin Gütlein, Emanuel Schmid, Stefan Kramer, Kathrin Fenner
Developing models for the prediction of microbial biotransformation pathways and half-lives of trace organic contaminants in different environments requires as training data easily accessible and sufficiently large collections of respective biotransformation data that are annotated with metadata on study conditions. Here, we present the Eawag-Soil package, a public database that has been developed to contain all freely accessible regulatory data on pesticide degradation in laboratory soil simulation studies for pesticides registered in the EU (282 degradation pathways, 1535 reactions, 1619 compounds and 4716 biotransformation half-life values with corresponding metadata on study conditions)...
February 23, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28226276/different-associations-of-albuminuria-with-total-and-cardiovascular-mortality-by-concentrations-of-persistent-organic-pollutants-in-the-elderly
#8
Hyun-Woo Kim, Jung-Hyun Kim, Dong-Won Lee, Sang-Hyun Cho, Ji-Hoon Jung, Ki-Su Kim, Duk-Hee Lee
Epidemiologic studies have indicated that albuminuria is associated with mortality from all causes and cardiovascular disease (CVD), with substantial heterogeneity. We evaluated if the associations of urine albumin creatinine ratio (ACR) with all-cause and CVD mortality differed depending on serum concentrations of persistent organic pollutants (POPs), strong lipophilic chemical mixtures with very long half-lives, which are recently linked to many degenerative diseases. Study subjects were participants of the National Health and Nutrition Examination Survey 1999-2004 who were 60 years or older at baseline (n=1215 and 1067 for organochlorine pesticides (OCPs) and other POPs, respectively)...
February 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28226013/suicide-attempts-by-exposure-to-toxic-agents-registered-in-a-toxicological-information-and-assistance-center-in-fortaleza-cear%C3%A3-brazil-2013
#9
Ana Paula Soares Gondim, Rachel Rabay Nogueira, João Gabriel Barbosa Lima, Rayra Aguiar Campos Lima, Polianna Lemos Moura Moreira Albuquerque, Maria do Socorro Batista Veras, Maria Augusta Drago Ferreira
Objective: to describe cases of suicide attempts by exposure to toxic agents registered by the Toxicological Information and Assistance Center in Fortaleza, Ceará, Brazil. Methods: this is a descriptive study using secondary data of the cases registered in 2013. Results: 410 cases were registered; 56.2% of the individuals were female and 79.7% were between 12 and 39 years old; most of them (86.4%) lived in urban areas and 67.2%, in Fortaleza; in 94...
January 2017: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/28225030/chemometric-assisted-quechers-extraction-method-for-post-harvest-pesticide-determination-in-fruits-and-vegetables
#10
Minmin Li, Chao Dai, Fengzhong Wang, Zhiqiang Kong, Yan He, Ya Tao Huang, Bei Fan
An effective analysis method was developed based on a chemometric tool for the simultaneous quantification of five different post-harvest pesticides (2,4-dichlorophenoxyacetic acid (2,4-D), carbendazim, thiabendazole, iprodione, and prochloraz) in fruits and vegetables. In the modified QuEChERS (quick, easy, cheap, effective, rugged and safe) method, the factors and responses for optimization of the extraction and cleanup analyses were compared using the Plackett-Burman (P-B) screening design. Furthermore, the significant factors (toluene percentage, hydrochloric acid (HCl) percentage, and graphitized carbon black (GCB) amount) were optimized using a central composite design (CCD) combined with Derringer's desirability function (DF)...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224659/assessment-of-the-toxicity-of-pesticides-on-honey-bee-drone-fertility-using-laboratory-and-semi-field-approaches-a-case-study-of-fipronil
#11
Guillaume Kairo, Yannick Poquet, Haïthem Haji, Sylvie Tchamitchian, Marianne Cousin, Marc Bonnet, Michel Pelissier, André Kretzschmar, Luc P Belzunces, Jean-Luc Brunet
Concern about the reproductive toxicity of plant protection products (PPPs) in honey bee reproducers is increasing. Because the reproductive capacity of honey bees is not currently considered during the risk assessment procedures performed during PPP registration, it is important to provide methods to assess such potential impairments. To achieve this aim, we used two different approaches that involved semi-field (SF) and laboratory (Lab) conditions to study the impact of Fipronil on drone fertility. For each approach, the drones were reared for 20 days, from emergence to sexual maturity, and exposed to Fipronil via a contaminated sugar solution...
February 22, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28224245/evaluation-of-ms-2-workflows-in-lc-q-orbitrap-for-pesticide-multi-residue-methods-in-fruits-and-vegetables
#12
Łukasz Rajski, María Del Mar Gómez Ramos, Amadeo R Fernández-Alba
LC-Q-Orbitrap efficiency was evaluated for pesticide multi-residue analysis by using three workflows involving simultaneous MS and MS(2) analysis. They were as follows: data-dependent MS(2) (dd-MS(2)), all-ion fragmentation (AIF) and variable data-independent analysis (vDIA). These MS(2) workflows were tested for the main method validation parameters such as detection and identification capabilities, repeatability, linear range and quantitation. QuEChER acetonitrile extracts (blanks and spiked with 166 pesticides) of 11 different fruits and vegetables were used for this evaluation...
February 21, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28223891/what-should-we-tell-our-patients-about-marijuana-cannabis-indica-and-cannabis-sativa
#13
EDITORIAL
Joseph Pizzorno
With several states allowing medicinal use of marijuana and a growing number decriminalizing recreational use, many of our patients are using this herbal drug. Approximately 43% of US adults have tried marijuana, with 13% using it regularly. These users are seeking help from integrative medicine practitioners regarding safety. They are looking for advice based on research and clinical experience, not politics or philosophical bias. The major health problems caused by marijuana appear to be bronchial irritation, decreased motivation, learning difficulties, and injuries...
December 2016: Integrative Medicine
https://www.readbyqxmd.com/read/28222980/acute-water-quality-criteria-for-polycyclic-aromatic-hydrocarbons-pesticides-plastic-additives-and-4-nonylphenol-in-seawater
#14
I Durán, R Beiras
Probabilistic environmental quality criteria for Naphthalene (Nap), Phenanthrene (Phe), Fluoranthene (Flu), Pyrene (Pyr), Triclosan (TCS), Tributyltin (TBT), Chlorpyrifos (CPY), Diuron (DUR), γ-Hexaclorocyclohexane (γ-HCH), Bisphenol A (BPA) and 4-Nonylphenol (4-NP) were derived from acute toxicity data using saltwater species representative of marine ecosystems, including algae, mollusks, crustaceans, echinoderms and chordates. Preferably, data concerns sublethal endpoints and early life stages from bioassays conducted in our laboratory, but the data set was completed with a broad literature survey...
February 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28221959/efficacy-of-ozonation-treatments-of-smoked-fish-for-reducing-its-benzo-a-pyrene-concentration-and-toxicity
#15
Irina Rozentale, Janis Ancans, Elena Bartkiene, Arturs Viksna, Vadims Bartkevics
Ozone is widely used in food processing, for example, to decompose mycotoxins or pesticide residues, to extend the shelf life of products, and for sanitation. The objective of this study was to assess the possibility of expanding the application of ozone for oxidative degradation of polycyclic aromatic hydrocarbons (PAHs). The evaluation was conducted by ozonation of a benzo[a]pyrene (BaP) standard solution and smoked fish (sprats) contaminated with PAHs. The effect of ozonation was immediate in the BaP solution; 89% of this toxic compound was decomposed after only 1 min of treatment...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221902/monitoring-pesticide-residues-in-fruits-and-vegetables-at-two-of-the-biggest-fresh-produce-markets-in-africa
#16
Mbulaheni T Mutengwe, Lizyben Chidamba, Lise Korsten
In most countries, fresh produce sold at local markets is usually not analyzed for agricultural chemical residues as export products are, which raises concerns about the perceived safety levels of local food supplies in contrast with exported products. The aim of this study was to determine pesticide residue levels in fruits and vegetables sold at two of the biggest fresh produce markets in Africa. A total of 199 fruit and vegetable samples were collected between 2012 and 2014 and analyzed for 74 pesticides commonly used in the horticultural sector...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221872/analysis-of-food-safety-and-security-challenges-in-emerging-african-food-producing-areas-through-a-one-health-lens-the-dairy-chains-in-mali
#17
Rachel Cheng, Alberto Mantovani, Chiara Frazzoli
Challenges posed by changes in livestock production in emerging food producing areas and demographic development and climate change require new approaches and responsibilities in the management of food chains. The increasingly recognized role of primary food producers requires the support of the scientific community to instruct effective approaches based on scientific data, tools, and expertise. Mali is an emerging food producing area, and this review covers (i) the dairy farming scenario and its environment, (ii) the role of dairy production in food security, including the greatly different animal rearing systems in the Sahel and tropical regions, (iii) risk management pillars as modern infrastructures, effective farmer organizations, and institutional systems to guarantee animal health and safety of products, and (iv) feasible interventions based on good practices and risk assessment at the farm level (e...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221856/enumeration-and-identification-of-coliform-bacteria-injured-by-chlorine-or-fungicide-mixed-with-agricultural-water
#18
Hidemi Izumi, Yuji Nakata, Ayano Inoue
Chemical sanitizers may induce no injury (bacteria survive), sublethal injury (bacteria are injured), or lethal injury (bacteria die). The proportion of coliform bacteria that were injured sublethally by chlorine and fungicide mixed with agricultural water (pond water), which was used to dilute the pesticide solution, was evaluated using the thin agar layer (TAL) method. In pure cultures of Enterobacter cloacae , Escherichia coli , and E. coli O157:H7 (representing a human pathogen), the percentage of chlorine-injured cells was 69 to 77% for dilute electrolyzed water containing an available chlorine level of 2 ppm...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221852/pesticide-residue-monitoring-on-south-african-fresh-produce-exported-over-a-6-year-period
#19
M T Mutengwe, L Chidamba, L Korsten
Six years of pesticide residue data from fresh produce destined for the export market were analyzed for the period 2009 to 2014. A total of 37,838 fruit (99.27%) and vegetable (0.73%) data sets analyzed for the presence of 73 pesticides were compared. Pesticides were detected on 56.46% of samples, of which 0.78% had multiple residues. Noncompliances detected were because of the use of unregistered pesticides (0.73%), values that exceeded established maximum residue levels (MRLs) (0.32%), or the combination of values that exceeded MRLs and the use of unregistered pesticide residues (0...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221787/multiple-pesticides-detoxification-function-of-maize-zea-mays-gst34
#20
Dongzhi Li, Li Xu, Sen Pang, Zhiqian Liu, Weisong Zhao, Chengju Wang
ZmGST34 is a maize tau class GST gene and was found to be differently expressed between two maize cultivars differing in tolerance to herbicide metolachlor. To explore the possible role of ZmGST34 in maize development, the expression pattern and substrate specificity of ZmGST34 were characterized by quantitative RT-PCR and heterologous expression system, respectively. The results indicated that the expression level of ZmGST34 was increased approximately 2 to 5-fold per day during the second-leaf stage of maize seedling...
February 21, 2017: Journal of Agricultural and Food Chemistry
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