These analyses show that this cyclic A M P phosphodiesterase.contains at least 15ng of zinc per activity unit. The sodium dodecyl sulphate/polyacrylamide-gel electrophoresis of fraction 18 suggests that the specific activity of pure enzyme is at least 104 units/mg, and the results of Fujimoto et al . (1974), obtained at 37"C, suggest it may be as high as 160 units/mg at 30°C. Thus 1 mol (65000g...

The possibility of imparting an antibacterial effect to cellulose tissue dyed with the product azo coupling diazotized 4,4’-diaminostilbene-2,2’-disulfonic acid 8-hydroxyquinoline has been shown. It was found that fabrics by fixing dye a silver salt have significant effect, which lasts at least 10 washings.

8-Hydroxyquinoline (8-HQ) was chosen as a powerful ligand for Hg solid phase extraction. Among several chelating resins based on 8-HQ, 5-phenylazo-8-hydroxyquinoline (5Ph8HQ) is used for mercury extraction in which the adsorption dynamics were fully studied. It has been shown that Hg(II) is totally absorbed by 5Ph8HQ within the first 30 minutes of contact time with t 1/2 5 minutes, following La...