نتایج جستجو برای: repellents
تعداد نتایج: 1212 فیلتر نتایج به سال:
Bird repellents that are effective have tended to be toxic, while those that are relatively nontoxic have tended to be ineffective. There is a need for repellents that work well and safely. Interest has focused on the natural chemical defenses used by plants to defend themselves from herbivores. Preferences of bullfinches in orchards for different pear cultivars were correlated with biochemical...
DEET (N,N-Diethyl-m-toluamide) is one of the most widely used mosquito repellents. Although DEET has been shown to be extremely effective, recent studies have revealed that certain individual insects are unaffected by its presence. A genetic basis for this has been shown in Aedes aegypti mosquitoes and the fruit fly Drosophila melanogaster, but, for the triatomine bug, Rhodnius prolixus, a decr...
Eight commercial repellents were tested against Aedes aegypti 0 and 4 h after application in serial dilution to volunteers and laboratory mice. Results were analyzed by multiple regression of percentage of biting (probit scale) on dose (logarithmic scale) and time. Empirical correction terms for conversion of values obtained in tests on mice to values expected in tests on human volunteers were ...
Eight commercial insect repellents were tested against Ornithodoros parkeri (Acari: Argasidae), Dermacentor variabilis (Acari: Ixodidae), Aedes aegypti (Diptera: Culicidae), and Xenopsylla cheopis (Siphonaptera: Pulicidae). Patterns of tolerance to the test materials were distinctive for each test species. Levels of tolerance were coded as character state 0 (sensitive), 1 (intermediate), or 2 (...
T he spread of the Zika virus is raising fears that the virus’s most heartbreaking consequencebabies with microcephaly born to infected motherswill affect the U.S. and other countries as it has affected Brazil. The virus hitches a ride with Aedes aegypti mosquitoes, whose preference for biting humans makes them an ideal vector for transferring virus from one victim to another. Repellents are ...
For millennia, people have utilized essential oil-rich plants to control mosquitoes and other hematophagous insects. A review of the literature found that terpenoids "sesquiterpenoid-rich oils" were effective in mosquito control. Due benign impression successful prevention bites, there has been a recent surge acceptance biobased agents as solutions, conjunction with worldwide ...
The ability to detect harmful chemicals rapidly is essential for the survival of all animals. In Caenorhabditis elegans (C. elegans), repellents trigger an avoidance response, causing animals to move away from repellents. Dihydrocaffeic acid (DHCA) is a water-soluble repellent and nonflavonoid catecholic compound that can be found in plant products. Using a Xenopus laevis (X. laevis) oocyte exp...
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