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Glyphosate

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https://www.readbyqxmd.com/read/29162843/behavioral-responses-of-honey-bees-apis-mellifera-to-natural-and-synthetic-xenobiotics-in-food
#1
Ling-Hsiu Liao, Wen-Yen Wu, May R Berenbaum
While the natural foods of the western honey bee (Apis mellifera) contain diverse phytochemicals, in contemporary agroecosystems honey bees also encounter pesticides as floral tissue contaminants. Whereas some ubiquitous phytochemicals in bee foods up-regulate detoxification and immunity genes, thereby benefiting nestmates, many agrochemical pesticides adversely affect bee health even at sublethal levels. How honey bees assess xenobiotic risk to nestmates as they forage is poorly understood. Accordingly, we tested nine phytochemicals ubiquitous in nectar, pollen, or propolis, as well as five synthetic xenobiotics that frequently contaminate hives-two herbicides (atrazine and glyphosate) and three fungicides (boscalid, chlorothalonil, and prochloraz)...
November 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29159896/comparisons-of-glyphosate-adsorption-properties-of-different-functional-cr-based-metal-organic-frameworks
#2
Dan Feng, Yan Xia
A Cr-based metal-organic framework, namely, MIL-101(Cr), was modified with amino (NH2 -) and urea (UR2 -) groups, and the materials were evaluated as adsorbents for glyphosate, and a comparison with commercial activated carbon was also discussed. The effects of the adsorption factors, such as adsorbent concentration, adsorption time, pH and ionic strength were mainly investigated. The results showed that a pseudo-second-order rate equation described the adsorption kinetics mechanisms well, while the Langmuir model and the Freundlich model fitted different adsorption isotherms, respectively...
November 21, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/29156344/neurotransmitter-changes-in-rat-brain-regions-following-glyphosate-exposure
#3
María-Aránzazu Martínez, Irma Ares, José-Luis Rodríguez, Marta Martínez, María-Rosa Martínez-Larrañaga, Arturo Anadón
The effects of glyphosate oral exposure (35, 75, 150 and 800mg/kg bw, 6 days) on brain region monoamine levels of male Wistar rats were examined. Glyphosate-treated rats (35, 75, 150 and 800mg/kg bw, 6 days), had no visible injury, i.e., no clinical signs of dysfunction were observed. After last dose of glyphosate, serotonin (5-HT), dopamine (DA) and norepinephrine (NE) and its metabolites levels were determined in the brain regions striatum, hippocampus, prefrontal, cortex, hypothalamus and midbrain, by HPLC...
November 17, 2017: Environmental Research
https://www.readbyqxmd.com/read/29155945/glyphosate-use-and-cancer-incidence-in-the-agricultural-health-study-an-epidemiologic-perspective
#4
Elizabeth M Ward
No abstract text is available yet for this article.
November 15, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29155836/genetic-variation-in-dip5-an-amino-acid-permease-and-pdr5-a-multiple-drug-transporter-regulates-glyphosate-resistance-in-s-cerevisiae
#5
Xiaoqing Rong-Mullins, Apoorva Ravishankar, Kirsten A McNeal, Zachery R Lonergan, Audrey C Biega, J Philip Creamer, Jennifer E G Gallagher
S. cerevisiae from different environments are subject to a wide range of selective pressures, whether intentional or by happenstance. Chemicals classified by their application, such as herbicides, fungicides and antibiotics, can affect non-target organisms. First marketed as RoundUp™, glyphosate is the most widely used herbicide. In plants, glyphosate inhibits EPSPS, of the shikimate pathway, which is present in many organisms but lacking in mammals. The shikimate pathway produces chorismate which is the precursor to all the aromatic amino acids, para-aminobenzoic acid, and Coenzyme Q10...
2017: PloS One
https://www.readbyqxmd.com/read/29154113/responses-of-hydrilla-verticillata-l-f-royle-and-vallisneria-natans-lour-hara-to-glyphosate-exposure
#6
Guidi Zhong, Zhonghua Wu, Jun Yin, Lulu Chai
Glyphosate is a broad-spectrum herbicide that is frequently detected in water bodies and is harmful to aquatic systems. We conducted an experiment to explore the ecological sensitivity of Hydrilla verticillata (L.f.) Royle and Vallisneria natans (Lour.) Hara to glyphosate. Our research focused on the physiological responses of H. verticillata and V. natans after exposure to various concentrations of glyphosate (0, 1, 10, 20, 30, 40, 50 and 80 mg/L) in hydroponic culture after one day (1D) and seven days (7D)...
November 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/29141721/coupling-ion-chromatography-to-q-orbitrap-for-the-fast-and-robust-analysis-of-anionic-pesticides-in-fruits-and-vegetables
#7
Łukasz Rajski, Francisco José Díaz Galiano, Víctor Cutillas, Amadeo R Fernández-Alba
Ion chromatography coupled to a quadrupole Orbitrap mass analyzer was used to develop a multiresidue method for the determination of highly polar pesticides and their metabolites (chlorate, perchlorate, fosetyl-aluminum, glyphosate, aminomethylphosphonic acid (AMPA), phosphonic acid, N-acetyl AMPA, and N-acetyl glyphosate) in fruits and vegetables. After extraction with methanol, samples were diluted 5× with water. No derivatization was applied. Pesticides were separated in an anion-exchange column. Water was used as the ion chromatography mobile phase...
November 15, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/29139345/herbicide-ingredients-change-salmonella-enterica-sv-typhimurium-and-escherichia-coli-antibiotic-responses
#8
Brigitta Kurenbach, Paddy S Gibson, Amy M Hill, Adam S Bitzer, Mark W Silby, William Godsoe, Jack A Heinemann
Herbicides are frequently released into both rural and urban environments. Commercial herbicide formulations induce adaptive changes in the way bacteria respond to antibiotics. Salmonella enterica sv. Typhimurium and Escherichia coli were exposed to common co-formulants of formulations, and S. enterica sv. Typhimurium was exposed to active ingredients dicamba, 2,4-D and glyphosate to determine what ingredients of the commercial formulations caused this effect. Co-formulants Tween80 and carboxymethyl cellulose induced changes in response, but the pattern of the responses differed from the active ingredients, and effect sizes were smaller...
November 17, 2017: Microbiology
https://www.readbyqxmd.com/read/29136183/glyphosate-use-and-cancer-incidence-in-the-agricultural-health-study
#9
Gabriella Andreotti, Stella Koutros, Jonathan N Hofmann, Dale P Sandler, Jay H Lubin, Charles F Lynch, Catherine C Lerro, Anneclaire J De Roos, Christine G Parks, Michael C Alavanja, Debra T Silverman, Laura E Beane Freeman
Background: Glyphosate is the most commonly used herbicide worldwide, with both residential and agricultural uses. In 2015, the International Agency for Research on Cancer classified glyphosate as "probably carcinogenic to humans," noting strong mechanistic evidence and positive associations for non-Hodgkin lymphoma (NHL) in some epidemiologic studies. A previous evaluation in the Agricultural Health Study (AHS) with follow-up through 2001 found no statistically significant associations with glyphosate use and cancer at any site...
November 9, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/29129974/screening-of-pesticides-with-the-potential-of-inducing-dsb-and-successive-recombinational-repair
#10
Karen Suárez-Larios, Ana-María Salazar-Martínez, Regina Montero-Montoya
A study was realized to ascertain whether eight selected pesticides would induce double strand breaks (DSB) in lymphocyte cultures and whether this damage would induce greater levels of proteins Rad51 participating in homologous recombination or of p-Ku80 participating in nonhomologous end joining. Only five pesticides were found to induce DSB of which only glyphosate and paraoxon induced a significant increase of p-Ku80 protein, indicating that nonhomologous end joining recombinational DNA repair system would be activated...
2017: Journal of Toxicology
https://www.readbyqxmd.com/read/29120397/highly-selective-polypyrrole-mip-based-gravimetric-and-electrochemical-sensors-for-picomolar-detection-of-glyphosate
#11
Zouhour Mazouz, Seyfeddine Rahali, Najla Fourati, Chouki Zerrouki, Nadia Aloui, Mahamadou Seydou, Nourdin Yaakoubi, Mohamed M Chehimi, Ali Othmane, Rafik Kalfat
There is a global debate and concern about the use of glyphosate (Gly) as an herbicide. New toxicological studies will determine its use in the future under new strict conditions or its replacement by alternative synthetic or natural herbicides. In this context, we designed biomimetic polymer sensing layers for the selective molecular recognition of Gly. Towards this end, complementary surface acoustic wave (SAW) and electrochemical sensors were functionalized with polypyrrole (PPy)-imprinted polymer for the selective detection of Gly...
November 9, 2017: Sensors
https://www.readbyqxmd.com/read/29120078/high-carbon-dioxide-concentration-and-elevated-temperature-impact-the-growth-of-weeds-but-do-not-change-the-efficacy-of-glyphosate
#12
Khawar Jabran, Mehmed Nedim Doğan
BACKGROUND: Global climate changes may impact the growth and management of weed species. This work was aimed at evaluating the impact of recent climate changes on growth of weeds and herbicide efficacy. The effects of temperature, carbon dioxide (CO2 ), and herbicide on growth and control of Bromus tectorum L., Hordeum murinum L., and Lactuca serriola L. were studied. Treatments included: 1) Control or ambient environment (CO2 =400-450 ppm; temperature 20/10 °C day/night); 2) Elevated temperature (CO2 =400-450 ppm; temperature 25/15 °C day/night); 3) High CO2 and elevated temperature (CO2 =800-900 ppm; temperature 25/15 °C day/night); 4) High CO2 (CO2 =800-900 ppm; temperature 20/10 °C day/night)...
November 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29117584/environmental-and-health-effects-of-the-herbicide-glyphosate
#13
REVIEW
A H C Van Bruggen, M M He, K Shin, V Mai, K C Jeong, M R Finckh, J G Morris
The herbicide glyphosate, N-(phosphonomethyl) glycine, has been used extensively in the past 40years, under the assumption that side effects were minimal. However, in recent years, concerns have increased worldwide about the potential wide ranging direct and indirect health effects of the large scale use of glyphosate. In 2015, the World Health Organization reclassified glyphosate as probably carcinogenic to humans. A detailed overview is given of the scientific literature on the movement and residues of glyphosate and its breakdown product aminomethyl phosphonic acid (AMPA) in soil and water, their toxicity to macro- and microorganisms, their effects on microbial compositions and potential indirect effects on plant, animal and human health...
November 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29115090/urine-methyl-hippuric-acid-levels-in-acute-pesticide-poisoning-estimation-of-ingested-xylene-volume-and-association-with-clinical-outcome-parameters
#14
Chi Young Choi, NamJun Cho, Su Yeon Park, Samel Park, Hyo Wook Gil, Sae Yong Hong
To determine the relationship between the oral ingestion volume of xylene and methyl hippuric acid (MHA) in urine, we measured MHA in 11 patients whose ingested xylene volume was identified. The best-fit equation between urine MHA and ingested amount of xylene was as follows: y (ingested amount of xylene, mL/kg) = -0.052x² + 0.756x (x = MHA in urine in g/g creatinine). From this equation, we estimated the ingested xylene volume in 194 patients who had ingested pesticide of which the formulation was not available...
December 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29110579/effects-of-glyphosate-residues-and-different-concentrate-feed-proportions-on-performance-energy-metabolism-and-health-characteristics-in-lactating-dairy-cows
#15
Karina Schnabel, Rolf Schmitz, Dirk von Soosten, Jana Frahm, Susanne Kersten, Ulrich Meyer, Gerhard Breves, Rudolf Hackenberg, Madeleine Spitzke, Sven Dänicke
The aim of this study was to examine the influence of glyphosate (GL) residues in feedstuffs on performance, energy balance and health-related characteristics of lactating dairy cows fed diets with different concentrate feed proportions. After an adaption period, 64 German Holstein cows (207 ± 49 d in milk; mean ± SD) were assigned to either groups receiving a GL contaminated total mixed ration (TMR) (GL groups) or an uncontaminated TMR (CON groups) during a 16 weeks trial. Contaminated feedstuffs used were legally GL-treated peas and wheat (straw and grain)...
December 2017: Archives of Animal Nutrition
https://www.readbyqxmd.com/read/29110107/effect-of-light-conditions-and-chemical-characteristics-of-water-on-dissipation-of-glyphosate-in-aqueous-medium
#16
Veena Yadav, Pervinder Kaur, Paawan Kaur
The present study was conducted to determine the effect of light conditions and chemical properties of water on dissipation of glyphosate. The residues of glyphosate and aminomethylphosphonic acid (AMPA) were quantified using fluorescence spectrophotometer after derivatization with 9-fluoroenylmethoxycarbonyl chloride (FMOC-Cl) and orthopthaldehyde (OPA). Average percent recoveries of glyphosate and AMPA from distilled, tap, and ground water ranged from 87.5 to 94.9, 87.3 to 93.7, and 80.6 to 92.0, respectively, with relative standard deviation less than 10%...
November 6, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29107902/ecotoxicological-risk-assessment-for-the-herbicide-glyphosate-to-non-target-aquatic-species-a-case-study-with-the-mussel-mytilus-galloprovincialis
#17
Valerio Matozzo, Jacopo Fabrello, Luciano Masiero, Federico Ferraccioli, Livio Finos, Paolo Pastore, Iole Maria Di Gangi, Sara Bogialli
Glyphosate (GLY) is one of the most used herbicide worldwide. Considering that information concerning the impact of GLY on bivalves is scarce, in this study we evaluated for the first time the effects of environmentally realistic concentrations of GLY (10, 100 and 1000 μg/L) to the mussel Mytilus galloprovincialis. Mussels were exposed for 7, 14 and 21 days and several biomarkers were measured in haemocytes/haemolymph (total haemocyte counts, haemocyte diameter and volume, haemolymph pH, haemolymph lactate dehydrogenase activity, haemocyte lysate lysozyme and acid phosphatase activities), as well as in gills and digestive gland (antioxidant enzyme and acetylcholinesterase activities)...
November 3, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29104250/a-pilot-study-in-cameroon-to-understand-safe-uses-of-pesticides-in-agriculture-risk-factors-for-farmers-exposure-and-management-of-accidental-cases
#18
Guy Bertrand Pouokam, William Lemnyuy Album, Alice S Ndikontar, Mohamed El Hady Sidatt
Chemical pesticides are widely used in Cameroon for agricultural production. In 2015, more than 600 pesticide products were approved for use in various foodstuffs. Much misuse of these chemicals by farmers has been documented in rural and urban settings. This pilot study aims to contribute to the improvement of the health of the population and the environmental preservation by identifying pesticide-poisoning cases, the most incriminated products and critical risk factors of exposure. Questionnaires were administered to pesticide vendors, farmers and health personnel, and observations made on farmers' practices at their work places...
November 1, 2017: Toxics
https://www.readbyqxmd.com/read/29100894/corrigendum-to-glyphosate-based-herbicide-exposure-causes-antioxidant-defence-responses-in-the-fruit-fly-drosophila-melanogaster-previously-published-at-cbpc-comp-biochem-physiol-c-185-186-2016-94-101
#19
Lais Mattos de Aguiar, Fernanda Hernandes Figueira, Marco Silva Gottschalk, Carlos Eduardo da Rosa
No abstract text is available yet for this article.
October 31, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29100121/effects-of-low-concentrations-of-glyphosate-based-herbicide-factor-540-%C3%A2-on-an-agricultural-stream-freshwater-phytoplankton-community
#20
Élise Smedbol, Marcelo Pedrosa Gomes, Serge Paquet, Michel Labrecque, Laurent Lepage, Marc Lucotte, Philippe Juneau
Residual glyphosate from glyphosate based herbicides (GBH) are ubiquitously detected in streams draining agricultural fields, and may affect phytoplankton communities present in these ecosystems. Here, the effects of the exposure (96 h) of a phytoplankton community collected in an agricultural stream to various glyphosate concentrations (1, 5, 10, 50, 100, 500 and 1000 μg l(-1)) of Factor 540(®) GBH were investigated. The lowest GBH concentration of 1 μg l(-1) reduced chlorophyll a and carotenoid contents...
October 31, 2017: Chemosphere
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