A bioassay that used postexposure feeding depression in Daphnia magna Straus as an endpoint previously had been developed under laboratory conditions. Laboratory studies revealed that this was a sensitive, robust endpoint, which could potentially be used in an in situ bioassay. This study adapted the laboratory bioassay for use in the field and deployed D. magna in situ at four known or suspect...

Recently, Aronson and colleagues (1) reported that men withprostate cancer receiving approximately 5 g/d of fishoil combined with a low-fat diet (15% kcal from fat) for 4 to 6 weeks before prostatectomy had 32% lower tumor ki67 staining compared with men consuming a Western diet (45%kcal from fat). This study is of interest because thedata suggest that dietary modification can greatly reduce tu...

This study investigated alternative in-field chemical controls against Bactrocera tryoni (Froggatt). Bioassay 1 tested the mortality of adults exposed to fruit and filter paper dipped in insecticide, and the topical application of insecticide to adults/fruit. Bioassay 2 measured the mortality of adults permitted to oviposit on fruit dipped in insecticide and aged 0, 1, 3, or 5 days, plus the pr...

A modified bioassay system was designed to demonstrate the diffusible nature of endothelium-derived contracting factor(s) released by acetylcholine in the aorta of spontaneously hypertensive rat. In "sandwich"-like layered preparation, isometric tension was recorded from a bioassay strip (without endothelium) in the presence of N(G)-nitro-L-arginine and tetrahydrobiopterin to selectively potent...

PubChem (http://pubchem.ncbi.nlm.nih.gov) is a public repository for biological activity data of small molecules and RNAi reagents. The mission of PubChem is to deliver free and easy access to all deposited data, and to provide intuitive data analysis tools. The PubChem BioAssay database currently contains 500,000 descriptions of assay protocols, covering 5000 protein targets, 30,000 gene targe...

This study used static bioassay to evaluate oxidative and genotoxic effect caused by ethanolic extract of A. philoxeroides in the liver C. gariepinus as well Histopathological damages on liver, gills intestine fish. LC50 was determined probit regression analysis. Fishes were exposed sublethal concentration at rate 1% 10% value replicate for 21days. During cause exposure fishes exhibited some be...

the european corn borer (ecb) is one of the most important insect pests of corn and some other crops such as rice in iran. this pest is one of the most important hosts of the entomopathogenic fungus beauveria bassiana, a well known fungal entomopathogen with high host range and considerable potential in insect pest control. in an isolate selection program of fungal isolates against ecb, ten iso...

entomopathogenic fungi produce secondary metabolites which may bioactively help fungus in its virulence toward insect hosts. beauveria bassiana produces several toxic low molecular compounds in vitro as well as in vivo, the most important of them is beauvericin. the beh isolate of the fungus was selected for beauvericin assay. beauvericin was obtained from surface and submerged cultures of the ...