نتایج جستجو برای: laboratory bioassay
تعداد نتایج: 288692 فیلتر نتایج به سال:
Marine chemical ecology is a young discipline, having emerged from the collaboration of natural products chemists and marine ecologists in the 1980s with the goal of examining the ecological functions of secondary metabolites from the tissues of marine organisms. The result has been a progression of protocols that have increasingly refined the ecological relevance of the experimental approach. ...
The transmissible spongiform encephalopathies (TSEs) or prion diseases are a group of fatal neurodegenerative disorders characterised by the accumulation of a pathological form of a host protein known as prion protein (PrP). The validation of abnormal PrP detection techniques is fundamental to allow the use of high-throughput laboratory based tests, avoiding the limitations of bioassays. We use...
Aliquots (0.1 mL) of whole-blood pools prepared to contain various concentrations of phenylalanine were applied to filter-paper collection cards, dried, and stored in sealed bags. We measured the phenylalanine content of the dried blood spots by bioassay, fluorometry, and "high-performance" liquid chromatography, and found that the concentrations remained constant for two years when samples wer...
Abstract Background and Aims: The Cydia pomonella granulovirus (CpGV) is a baculovirus and very effective biological control agent against apple pest, codling moth, Cydia pomonella L. especially for healthy organic apple production and protection. Not only, screening of CpGV isolates via biochemical variation, but also their biological variation is practically necessary. Howeve...
abstract background and aims: the cydia pomonella granulovirus (cpgv) is a baculovirus and very effective biological control agent against apple pest, codling moth, cydia pomonella l. especially for healthy organic apple production and protection. not only, screening of cpgv isolates via biochemical variation, but also their biological variation is practically necessary. however, the bioassay...
orius albidipennis reuter is an important predator of economic pests in greenhouse. in this studu, investigations were performed on toxicity values of abamectin, spinosad and chlorpyrifos in laboratory (petri dish) and greenhouse (clip cage) conditions. lc50 and lc90 values were determined to both sexes, male and female, by using sas software, and comparisons were made according to ratio of lc5...
The OECD program to validate the rat uterotrophic bioassay. Phase 2: dietary phytoestrogen analyses.
Many commercial laboratory diets have detectable levels of isoflavones (e.g., phytoestrogens such as genistein [GN]) that have weak estrogenic activity both in vitro and in vivo. During validation studies of the uterotrophic bioassay, diet samples from 20 participating laboratories were collected and analyzed for three major phytoestrogens: GN, daidzein (DN), and coumestrol (CM). Soy phytoestro...
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