منابع مشابه
Recent advances of pyrethroids for household use.
Development of pyrethroids for household use and recent advances in the syntheses of (1R)-trans-chrysanthemic acid, the acid moiety of most of the household pyrethroids, are reviewed. As another important acid moiety, we discovered norchrysanthemic acid to have a significant vapor action at room temperature when esterified with fluorobenzyl alcohols. In particular, 2,3,5,6-tetrafluoro-4-methoxy...
متن کاملProperties and applications of pyrethroids.
Improved understanding of the factors determining the insecticidal activity, the mammalian toxicity, and the stability in air and light of natural and synthetic pyrethroids has led to a series of new compounds with a very favorable combination of properties. Their characteristics include outstanding potency to insects, low toxicity to mammals associated with rapid metabolic breakdown and, in ap...
متن کاملSynthetic Pyrethroids: Toxicity and Metabolism
Synthetic Pyrethroids are synthetic analogs of naturally occurring pyrethrins, found in extract from Chrysanthemum flowers. They were launched as a replacement of highly toxic class of pesticides like DDT and Organophosphates in 1980s. Major success of pyrethroids lies in the low toxicity of them towards mammals as well as humans and due to which they have wide range of applications right from ...
متن کاملstudy of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
Restricted application of pyrethroids to cattle
During the last decade there has been increasing emphasis on getting farmers to control tsetse themselves, instead of relying on governments or donor organizations. The only techniques that are feasible in such self-help schemes are bait methods, and the most cost-effective of these is the application of pyrethroids to cattle, provided there are adequate numbers of cattle spread fairly evenly w...
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ژورنال
عنوان ژورنال: Medical Entomology and Zoology
سال: 1970
ISSN: 0424-7086,2185-5609
DOI: 10.7601/mez.21.81