Acrylamide in tunnel construction--new (or old) lessons to be learned?
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The cultural conditions for the growth of Norcardia cell were studied in this paper. Controlling pH value, adding nutrient and optimizing the quantity of inducer during cultivation, the activity of nitrile hydratase reached 6567 u/mL (culture medium), which was the highest value appeared in native journals. In the farther hydratase experiments, no by-product, crylic acid, was detected. It showed that the activity of amidase was not promoted obviously while the activity of nitrile hydratase was increased greatly. The results set a strong foundation for the industrial application and the research on new technology.
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Quantitative structure-activity relationships of antiallergic N-[4-[4-(diphenylmethyl)-1-piperazinyl]-butyl]-3-(3-pyridyl)acr yl-amide s were studied. It was shown that the biological action depends on lipophilic and steric substituent features; apolar but small groups improve activity. Diagnostic statistics indicated that the QSAR equation is relatively robust. It was hypothesized from molecular modelling that the substituents influence primarily the pharmacokinetic-toxokinetic behavior of the compounds.