Results 141 to 150 of about 10,980 (183)

Oxidative desulfuration of chlorpyrifos, chlorpyrifos‐methyl, and leptophos by rat brain and liver

Journal of Biochemical Toxicology, 1989
AbstractThe oxidative desulfuration of the three phosphorothionate insecticides—chlorpyrifos, chlorpyrifos‐methyl, and leptophos—was studied in rat brain and liver. Hepatic microsomes demonstrated activities of 4–28 nmol/g/min, with male activity 2‐ to 4‐fold higher than female activity.
J E, Chambers, H W, Chambers
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Measurement of operator exposure to chlorpyrifos

Pest Management Science, 2013
AbstractBACKGROUNDTo date, no research has been conducted to establish exposure levels for occupational pesticide operators under typical use scenarios in China. Through surrogate skin techniques (the whole‐body method), the authors monitored dermal and inhalation exposure of pesticide applicators in China. In addition, the exposure of pesticide mixers
BeiBei, Gao, ChuanJiang, Tao, JiMing, Ye, Jun, Ning, XiangDong, Mei, ZhiFu, Jiang, Shuo, Chen, DongMei, She   +7 more
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A review of the reference dose for chlorpyrifos

Regulatory Toxicology and Pharmacology, 2006
Chlorpyrifos is an inhibitor of cholinesterase (ChE) and inhibition of ChE is believed to be the most sensitive effect in all animal species evaluated and in humans from previous evaluations. Recent literature, in particular epidemiology studies reporting associations between chlorpyrifos levels and fetal birth weight decreases, suggest the need to ...
Qiyu, Zhao, Michael, Dourson, Bernard, Gadagbui   +2 more
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Chlorpyrifos: Pharmacokinetics in human volunteers

Toxicology and Applied Pharmacology, 1984
The kinetics of chlorpyrifos, an organophosphorothioate insecticide, and its principal metabolite, 3,5,6-trichloro-2-pyridinol (3,5,6-TCP), were investigated in six healthy male volunteers given a single 0.5 mg/kg po and, 2 or more weeks later, a 0.5 or 5.0 mg/kg dermal dose of chlorpyrifos.
R J, Nolan, D L, Rick, N L, Freshour, J H, Saunders   +3 more
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Chlorpyrifos-induced delayed polyneuropathy

Archives of Toxicology, 1991
Chlorpyrifos [0,0-diethyl 0-(3,5,6-trichloro-pyridyl) phosphorothioate] caused delayed polyneuropathy in man. Contrary to previous studies, we report here that it also causes delayed polyneuropathy in the hen, the animal model for this toxicity.
CAPODICASA E, SCAPELLATO ML, MORETTO A, CAROLDI S, LOTTI, MARCELLO   +4 more
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Environmental Fate of Chlorpyrifos

1993
Chlorpyrifos is an organophosphorus compound that displays broad-spectrum insecticidal activity against a number of important arthropod pests. As a result, it is employed in a wide variety of agricultural and specialty pest control scenarios. Various formulations of chlorpyrifos have been developed to maximize stability and contact with pests and ...
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Chlorpyrifos degradation in turkish soil

Journal of Environmental Science and Health, Part B, 1999
Degradation of chlorpyrifos was evaluated in laboratory studies. Surface (0-15 cm) and subsurface (40-60 cm) clay loam soils from a pesticide-untreated field were incubated in biometer flasks for 97 days at 25 degrees C. The treatment was 2 micrograms g-1 [2,6-pyridinyl-14C] chlorpyrifos, with 74 kBq radioactivity per 100 g soil flask.
U, Yücel, M, Ylim, K, Gözek, C S, Helling, Y, Sarýkaya   +4 more
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Toxicologic evaluation of chlorpyrifos in cats

American Journal of Veterinary Research, 1988
SUMMARY Twenty-four male domestic shorthair cats were used to evaluate the acute and chronic effects of a single, toxic but sublethal, orally administered dose of chlorpyrifos. A dosage of 10 mg/kg of body weight did not induce clinical signs of toxicosis, but a dosage of 40 mg/kg induced clinical signs of toxicosis, and 1 of 12 cats died. Chlorpyrifos
S B, Hooser, V R, Beasley, J P, Sundberg, K, Harlin   +3 more
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Photolysis of chlorpyrifos‐methyl, chlorpyrifos‐methyl oxon, and 3,5,6‐trichloro‐2‐pyridinol

Journal of Physical Organic Chemistry, 2019
AbstractThe photodegradation of chlorpyrifos‐methyl (1), and two of its photodegradation products, chlorpyrifos‐methyl oxon (2), and 3,5,6‐trichloro‐2‐pyridinol (3) was studied using low pressure Hg lamps irradiating at 254 nm either in pure acetonitrile (ACN) or in 10% ACN/H2O. Experiments conducted in pure ACN allowed us to identify the photoproducts
Virginia L. Lobatto, Gustavo A. Argüello, Elba I. Buján   +2 more
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Chlorpyrifos

Neurotoxicology and Teratology, 2000
Jacques P.J Maurissen, Mamtha R Shankar, Joel L Mattsson   +2 more
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