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A simple and rapid isothermal absorptiometric assay for detection of viable microbes using the redox color indicator 2,6-dichlorophenolindophenol (DCPIP) was studied. The absorbance of DCPIP decreased at 600nm because of a redox reaction occurring between DCPIP and the surface membrane of viable microbes and was inversely proportional to the viable cell density. The redox reaction was found not only...
Twelve basic taxoids and 22 neutral taxoids were isolated from basic and polar neutral fractions of the extracts of needles and twigs of Taxus cuspidata. Among them, taxine NA-13, 3,11-cyclotaxinine NN-1, taxinine NN-6, 11(15→1)abeo-taxinine NN-1, taxine NA-8, and taxine NA-4 were isolated first from natural sources by us. The cytotoxic activity of isolated compounds was evaluated against three human...
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