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https://www.readbyqxmd.com/read/28324251/simulating-changes-in-cropping-practises-in-conventional-and-glyphosate-tolerant-maize-i-effects-on-weeds
#1
Nathalie Colbach, Alice Fernier, Valérie Le Corre, Antoine Messéan, Henri Darmency
Herbicide-tolerant (HT) crops such as those tolerant to glyphosate simplify weed management and make it more efficient, at least at short-term. Overreliance on the same herbicide though leads to the spread of resistant weeds. Here, the objective was to evaluate, with simulations, the impact on the advent of glyphosate resistance in weeds of modifications in agricultural practises resulting from introducing HT maize into cropping systems. First, we included a single-gene herbicide resistance submodel in the existing multispecific FLORSYS model...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28319884/sodium-chlorate-induces-dna-damage-and-dna-protein-cross-linking-in-rat-intestine-a-dose-dependent-study
#2
Shaikh Nisar Ali, Fariheen Aisha Ansari, Hussain Arif, Riaz Mahmood
Sodium chlorate (NaClO3) is widely used in paper and pulp industries and as a non-selective herbicide. It is also a major by-product generated upon disinfection of drinking water by chlorine dioxide. In this study, we have investigated the genotoxicity of NaClO3 on the small intestine of rats. Adult male rats were divided into 5 groups: one control and four NaClO3 treated groups. The NaClO3 treated groups were given a single acute oral dose of NaClO3 (100, 250, 500 and 750 mg/kg body weight) and sacrificed 24 h later...
March 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28319746/predicting-biphasic-responses-in-binary-mixtures-pelargonic-acid-versus-glyphosate
#3
Regina G Belz, Hans-Peter Piepho
Predicting hormesis in mixtures is challenging, but essential considering that chemical exposures often occur in mixtures and at low doses. This study investigated mixture effects with two herbicides prone to induce hormesis and to interact, namely pelargonic acid versus glyphosate. Five independent mixture experiments were conducted in vitro to assess effects on root growth of lettuce. Mixture effects on the dose were analyzed using classical joint-action models in terms of deviation from the reference model of concentration addition...
March 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28318303/toxicological-sensitivity-of-pennisetum-americanum-l-k-schum-to-atrazine-exposure
#4
Zhao Jiang, Guangxia Su, Jinmei Li, Bingbing Ma, Yukun Chen, Dexin Shan, Ying Zhang
The tolerance of Pennisetum americanum (L.) K Schum (P. americanum) to the herbicide atrazine, as well as the atrazine accumulation in exposed plants, was investigated in this study. The germination of P. americanum seeds was not significantly inhibited by exposure to atrazine at concentrations below 100 mg·L(-1). The roots of the seedlings were much more sensitive to atrazine than the shoots were, as shown by observations that shoot and root elongation were significantly inhibited by treatment with 100 mg·kg(-1) and 50 mg·kg(-1) of atrazine, respectively...
March 20, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28316094/predicting-herbicide-mixture-effects-on-multiple-algal-species-using-mixture-toxicity-models
#5
Takashi Nagai
The validity of the application of mixture toxicity models, concentration addition (CA) and independent action (IA), to species sensitivity distribution (SSD) for calculation of multi-substance potentially affected fraction (msPAF) was examined in laboratory experiments. Toxicity assays of herbicide mixtures using 5 species of periphytic algae were conducted. Two mixture experiments were designed: a mixture of 5 herbicides with similar mode of action (MoA) and a mixture of 5 herbicides with dissimilar MoA, corresponding to the assumptions of the CA and IA models, respectively...
March 18, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28314628/petit-high-pressure-carbon-dioxide-stress-increases-synthesis-of-s-adenosylmethionine-and-phosphatidylcholine-in-yeast-saccharomyces-cerevisiae
#6
Liyuan Niu, Kazuki Nomura, Hitoshi Iwahashi, Hiroyuki Matsuoka, Satoshi Kawachi, Yoshihisa Suzuki, Katsuhiro Tamura
Petit-High Pressure Carbon Dioxide (p-HPCD) is a promising nonthermal technology for foods pasteurization. Cluster analysis of gene expression profiles of Saccharomyces cerevisiae exposed to various stresses exhibited that gene expression profile for p-HPCD stress (0.5MPa, 25°C) was grouped into a cluster including profiles for Sodium Dodecyl Sulfate and Roundup herbicide. Both are detergents that can disorder membrane structurally and functionally, which suggests that cell membrane may be a target of p-HPCD stress to cause cell growth inhibition...
March 8, 2017: Biophysical Chemistry
https://www.readbyqxmd.com/read/28314393/simple-cost-effective-and-sensitive-liquid-chromatography-diode-array-detector-method-for-simultaneous-determination-of-eight-sulfonylurea-herbicides-in-soya-milk-samples
#7
Tomasz Rejczak, Tomasz Tuzimski
In this study authors propose a simple, cost-effective and sensitive liquid chromatography diode array detector (HPLC-DAD) method for the simultaneous determination of eight sulfonylurea herbicides (oxasulfuron, metsulfuron-methyl, triasulfuron, rimsulfuron, chlorsulfuron, mesosulfuron-methyl, amidosulfuron and bensulfuron-methyl) in soya milk samples. QuEChERS-based extraction procedure presents good performance for all of the analytes with recoveries in the range of 61-108% and relative standard deviations (RSD%) less than 15%...
November 18, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28314152/monitoring-a-large-number-of-pesticides-and-transformation-products-in-water-samples-from-spain-and-italy
#8
Nikolaos I Rousis, Richard Bade, Lubertus Bijlsma, Ettore Zuccato, Juan V Sancho, Felix Hernandez, Sara Castiglioni
Assessing the presence of pesticides in environmental waters is particularly challenging because of the huge number of substances used which may end up in the environment. Furthermore, the occurrence of pesticide transformation products (TPs) and/or metabolites makes this task even harder. Most studies dealing with the determination of pesticides in water include only a small number of analytes and in many cases no TPs. The present study applied a screening method for the determination of a large number of pesticides and TPs in wastewater (WW) and surface water (SW) from Spain and Italy...
March 14, 2017: Environmental Research
https://www.readbyqxmd.com/read/28303784/a-rapid-method-for-the-quantitative-determination-of-34-pesticides-in-nonalcoholic-carbonated-beverages-using-liquid-liquid-extraction-coupled-to-dispersive-solid-phase-cleanup-followed-by-gas-chromatography-with-tandem-mass-spectrometry
#9
Satyajeet Rai, Madhuri Devi Gullapalli, Anshuman Srivastava, Hussain Shaik, Mohammed Haris Siddiqui, Mohana Krishna Reddy Mudiam
An economical, rapid, and sensitive multiresidue method using liquid-liquid extraction (LLE) coupled with dispersive SPE (dSPE) cleanup was developed for the quantitative determination of 34 multiclass multiresidue (MCMR) pesticides (14 organochlorines, eight organophosphates, 10 synthetic pyrethroids, and two herbicides) in nonalcoholic carbonated beverages (cola, orange, lemon-lime, and citra) using GC with tandem MS. The procedure mainly involved LLE by dichloromethane and dSPE cleanup in the presence of magnesium sulfate, primary secondary amine, and C<sub>18</sub>...
March 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28303546/clathrin-dependent-uptake-of-paraquat-into-sh-sy5y-cells-and-its-internalization-into-different-subcellular-compartments
#10
Fengrui Li, Xiaofei Tian, Xiaoni Zhan, Baojie Wang, Mei Ding, Hao Pang
The herbicide paraquat (PQ) is an exogenous toxin that allows the selective activation of dopaminergic neurons in the mesencephalon to induce injury and also causes its apoptosis in vitro. However, uptake mechanisms between PQ and neurons remain elusive. To address this issue, we undertook a study of PQ endocytosis in a dopaminergic SH-SY5Y cell line as well as explored the subsequent subcellular location and potential functional analysis of PQ. The PQ was found to bind the SH-SY5Y cell membrane and then became internalized via a clathrin-dependent pathway...
March 16, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28303143/copy-number-variation-in-acetolactate-synthase-genes-of-thifensulfuron-methyl-resistant-alopecurus-aequalis-shortawn-foxtail-accessions-in-japan
#11
Satoshi Iwakami, Yoshiko Shimono, Yohei Manabe, Masaki Endo, Hiroyuki Shibaike, Akira Uchino, Tohru Tominaga
Severe infestations of Alopecurus aequalis (shortawn foxtail), a noxious weed in wheat and barley cropping systems in Japan, can occur even after application of thifensulfuron-methyl, a sulfonylurea (SU) herbicide. In the present study, nine accessions of A. aequalis growing in a single wheat field were tested for sensitivity to thifensulfuron-methyl. Seven of the nine accessions survived application of standard field rates of thifensulfuron-methyl, indicating that severe infestations likely result from herbicide resistance...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28300212/effect-of-pesticides-on-microbial-communities-in-container-aquatic-habitats
#12
Ephantus J Muturi, Ravi Kiran Donthu, Christopher J Fields, Imelda K Moise, Chang-Hyun Kim
Container aquatic habitats support a specialized community of macroinvertebrates (e.g. mosquitoes) that feed on microbial communities associated with decaying organic matter. These aquatic habitats are often embedded within and around agricultural lands and are frequently exposed to pesticides. We used a microcosm approach to examine the single and combined effects of two herbicides (atrazine, glyphosate), and three insecticides (malathion, carbaryl, permethrin) on microbial communities of container aquatic habitats...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28300023/optimization-and-validation-of-a-residue-analysis-method-for-glyphosate-glufosinate-and-their-metabolites-in-plant-matrixes-by-liquid-chromatography-with-tandem-mass-spectrometry
#13
Dasharath P Oulkar, Sandip Hingmire, Arnab Goon, Manjusha Jadhav, Bharat Ugare, Ahammed Shabeer Thekkumpurath, Kaushik Banerjee
A sensitive and accurate LC with tandem MS (MS/MS)-based method was developed and validated for the analysis of the herbicide glyphosate, its metabolite aminomethylphosphonic acid (AMPA), and glufosinate after derivatization with 9-fluorenylmethyl chloroformate (FMOC-Cl) in various plant matrixes. The method also covers direct analysis of the glufosinate metabolites 3-methylphosphinicopropionic acid (3-MPPA) and N-acetyl-glufosinate (NAG). The homogenized samples were extracted with 0.1% formic acid in water-dichloromethane (50 + 50)...
March 23, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28299584/combined-molecular-docking-and-qsar-study-of-fused-heterocyclic-herbicide-inhibitors-of-d1-protein-in-photosystem-ii-of-plants
#14
Simona Funar-Timofei, Ana Borota, Luminita Crisan
Cinnoline, pyridine, pyrimidine, and triazine herbicides were found be inhibitors of the D1 protein in photosystem II (D1 PSII) electron transport of plants. The photosystem II inhibitory activity of these herbicides, expressed by experimental [Formula: see text] values, was modeled by a docking and quantitative structure-activity relationships study. A conformer ensemble for each of the herbicide structure was generated using the MMFF94s force field. These conformers were further employed in a docking approach, which provided new information about the rational "active conformations" and various interaction patterns of the herbicide derivatives with D1 PSII...
March 16, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/28293428/photocatalytic-degradation-of-atrazine-herbicide-with-illuminated-fe-3-tio2-nanoparticles
#15
Narges Shamsedini, Mansooreh Dehghani, Simin Nasseri, Mohammad Ali Baghapour
BACKGROUND: Atrazine is a herbicide that is widely used to control broadleaf and grassy weeds for growing many crops especially in maize production. It is a frequently detected herbicide in many groundwater resources. This study aimed to assess the feasibility of using ultraviolet radiation UV and fortified nanoparticles of titanium dioxide (TiO2) doped with trivalent iron to remove atrazine from aqueous phase and determin the removal efficiency under the optimal conditions. RESULTS: The results of this study demonstrated that the maximum atrazine removal rate was at pH = 11 in the presence of Fe(+ 3)-TiO2 catalyst =25 mg/L and the initial concentration of atrazine equal to 10 mg/L...
2017: Journal of Environmental Health Science & Engineering
https://www.readbyqxmd.com/read/28292609/organic-micropollutants-omps-oxidation-by-ozone-effect-of-activated-carbon-on-toxicity-abatement
#16
Oscar Rozas, Carolina Baeza, Katherine Núñez, Alfred Rossner, Roberto Urrutia, Héctor D Mansilla
Oxidation and removal of organic micropollutants (OMPs) on ultrapure (UPW) and natural water (NW) by ozone (O3) and ozone/powdered activated carbon (O3/PAC) have been studied. The OMPs atrazine (ATZ, herbicide), carbamazepine (CBZ, anticonvulsant), diclofenac (DCL, anti-inflammatory) and triclosan (TCS, antimicrobial) are incorporated continuously and uncontrolled on water treatment systems (e.g., drinking water treatment plants, wastewater treatment plants). Batch experiments on ultrapure and natural water showed that ATZ treated with O3 and O3/PAC has the slowest transformation rate (>90% at 30min reaction) while CBZ, DCL and TCS were oxidized very fast (>90% at ~5min)...
March 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28290090/evaluation-of-atrazine-degradation-applied-to-different-energy-systems
#17
EDITORIAL
Ailton J Moreira, Bianca S Pinheiro, André F Araújo, Gian P G Freschi
Atrazine is an herbicide widely used in crops and has drawn attention due to potential pollution present in soil, sediment, water, and food. Since conventional methods are not potentially efficient to persistent degradation of organic compounds, new technology has been developed to remove them, especially practices utilizing advanced oxidation processes (AOPs). This work aims to evaluate the use of different energies (ultraviolet (UV), microwaves (MW), and radiations (MW-UV)) to the herbicide atrazine through the process of photo-oxidation...
March 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28289424/secondary-effects-of-glyphosate-action-in-phelipanche-aegyptiaca-inhibition-of-solute-transport-from-the-host-plant-to-the-parasite
#18
Tal Shilo, Baruch Rubin, Dina Plakhine, Shira Gal, Rachel Amir, Yael Hacham, Shmuel Wolf, Hanan Eizenberg
It is currently held that glyphosate efficiently controls the obligate holoparasite Phelipanche aegyptiaca (Egyptian broomrape) by inhibiting its endogenous shikimate pathway, thereby causing a deficiency in aromatic amino acids (AAA). While there is no argument regarding the shikimate pathway being the primary site of the herbicide's action, the fact that the parasite receives a constant supply of nutrients, including proteins and amino acids, from the host does not fit with an AAA deficiency. This apparent contradiction implies that glyphosate mechanism of action in P...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28288428/effects-of-roundup-formulations-on-biochemical-biomarkers-and-male-sperm-quality-of-the-livebearing-jenynsia-multidentata
#19
Jessica Andrea Albañil Sánchez, Antonio Sergio Varela, Carine Dahl Corcini, Janaina Camacho da Silva, Ednei Gilberto Primel, Sergiane Caldas, Roberta Daniele Klein, Camila De Martinez Gaspar Martins
Roundup(®) formulations are the most consumed glyphosate-based herbicides in the world. When applied, they may reach water bodies and exert toxicity toward non-target species. This study evaluated and compared the effects of different variations of Roundup on biochemical biomarkers as oxidative parameters and Acethylchorinesterase (AChE) activity, and sperm quality of the livebearing Jenynsia multidentata. Fish were acutely (96 h) exposed to Roundup Original(®) (RO), Roundup Transorb(®) (RT) and Roundup WG(®) (RWG) at 0...
March 1, 2017: Chemosphere
https://www.readbyqxmd.com/read/28288422/effect-of-the-polarity-reversal-frequency-in-the-electrokinetic-biological-remediation-of-oxyfluorfen-polluted-soil
#20
Silvia Barba, José Villaseñor, Manuel A Rodrigo, Pablo Cañizares
This work studies the feasibility of the periodic polarity reversal strategy (PRS) in a combined electrokinetic-biological process for the remediation of clayey soil polluted with a herbicide. Five two-weeks duration electrobioremediation batch experiments were performed in a bench scale set-up using spiked clay soil polluted with oxyfluorfen (20 mg kg(-1)) under potentiostatic conditions applying an electric field between the electrodes of 1.0 V cm(-1) (20.0 V) and using PRS with five frequencies (f) ranging from 0 to 6 d(-1)...
March 3, 2017: Chemosphere
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