نتایج جستجو برای: paraquat

تعداد نتایج: 3102  

Introduction: Paraquat triggers oxidative stress and apoptosis. This study aimed to explore the effects of 7-week aerobic training and piperine supplementation on oxidative stress markers of brain tissue in male Wistar rats exposed to paraquat. Materials and Methods: Forty-eight adult rats were divided into 6 groups: 1) sham, 2) paraquat (negative control), 3) paraquat+training, 4) paraquat+tra...

Journal: :International archives of occupational and environmental health 2009
Kiyoung Lee Eun-Kee Park Maria Stoecklin-Marois Marja E Koivunen Shirley J Gee Bruce D Hammock Laurel A Beckett Marc B Schenker

OBJECTIVE Paraquat is an herbicide widely used worldwide. This study determined the extent of occupational exposure to paraquat among farm workers in Costa Rica and identified determinants of occupational exposure. METHODS Twenty-four hour urine samples were collected from 119 paraquat handlers and 54 non-handlers from banana, coffee and palm oil farms. Information about herbicide handling op...

Journal: :caspian journal of environmental sciences 2012
m esfahani

pre-harvest desiccation of rapeseed crop may allow a more timely harvest as well as increase the speed and harvest operation efficiency as a second crop after rice. an effective desiccant which could be used as a harvest-aid with no negative effects on rapeseed yield and quality would be advantageous for oil seed crop producers and may reduce yield losses with no interferential effects on rice ...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2001
Z Szigeti I Rácz D Lásztity

The paper gives an overview of literature on paraquat resistance of weeds and the proposed mechanism of resistance. New results we achieved on horseweed (Conyza canadensis /L./, Cronq.) are discussed in detail. It was demonstrated that there is no significant constitutive difference related to the paraquat resistance between untreated susceptible and paraquat-resistant horseweed plants. The low...

2017
Caio A. C. G. Brunharo Bradley D. Hanson

Lolium perenne L. spp. multiflorum (Lam.) Husnot (LOLMU) is a winter annual weed, common to row crops, orchards and roadsides. Glyphosate-resistant populations of LOLMU are widespread in California. In many situations, growers have switched to paraquat or other postemergence herbicides to manage glyphosate-resistant LOLMU populations. Recently, poor control of LOLMU with paraquat was reported i...

Behzad Nemadoost Haghi, Mahdi Banaee, Maryam Vaziriyan, Shima Shahafve, Somayeh Tahery,

Background: Paraquat is a non-selective contact herbicide, widely used to control weeds in agriculture farms and aquatic plants in surface waters. Paraquat can have adverse effects on the health of aquatic organisms. The aim of this study was to detect the alterations in the blood biochemical parameters of common carp exposed to sub-lethal concentrations of commercial formulations of paraquat. ...

2009
Masaaki OKABE Koichi AKIYAMA Sogo NISHIMOTO Takuya SUGAHARA Yoshimi KAKINUMA

Paraquat is one of herbicides, known to have toxicity in animals and human. It has been reported that paraquat injures lungs and also induces abnormal differentiations in muscle cells. This suggests the possibility that paraquat perturbs the differentiation of muscle. In this study, we examined the effects of paraquat on the differentiation of C2C12 cells, mouse myoblast. In presence of paraqua...

Journal: :Brain research 2001
K Shimizu K Ohtaki K Matsubara K Aoyama T Uezono O Saito M Suno K Ogawa N Hayase K Kimura H Shiono

Due to the structural similarity to N-methyl-4-phenyl pyridinium (MPP(+)), paraquat might induce dopaminergic toxicity in the brain. However, its blood--brain barrier (BBB) penetration has not been well documented. We studied the manner of BBB penetration and neural cell uptake of paraquat using a brain microdialysis technique with HPLC/UV detection in rats. After subcutaneous administration, p...

Journal: :Environmental Health Perspectives 1976
J S Bus S D Aust J E Gibson

The purpose of this study was to investigate the hypothesis that paraquat pulmonary toxicity results from cyclic reduction-oxidation of paraquat with sequential generation of superoxide radicals and singlet oxygen and initiation of lipid peroxidation. In vitro mouse lung microsomes catalyzed an NADPH-dependent, single-electron reduction of paraquat. Incubation of paraquat with NADPH, NADPH-cyto...

Journal: :Plant physiology 2013
Jianyong Li Jinye Mu Jiaoteng Bai Fuyou Fu Tingting Zou Fengying An Jian Zhang Hongwei Jing Qing Wang Zhen Li Shuhua Yang Jianru Zuo

Paraquat is one of the most widely used herbicides worldwide. In green plants, paraquat targets the chloroplast by transferring electrons from photosystem I to molecular oxygen to generate toxic reactive oxygen species, which efficiently induce membrane damage and cell death. A number of paraquat-resistant biotypes of weeds and Arabidopsis (Arabidopsis thaliana) mutants have been identified. Th...

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