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Urea plays an important role in the cotton fabric printing process as a dye solubilization and disaggregating agent. However, the using of urea can cause a series of environmental problems because of the high ammonia–nitrogen content in the printing effluent. Polyethylene glycol is a nonionic soluble polymer without nitrogen element. The printability of cotton fabric using polyethylene glycol with...
The effects of polyethylene glycol (PEG) of different molecular (1000, 2000), glycerol, ethylene glycol on the catalytic activity of tryptophan synthase were studied. The results indicated that the addition of PEG 2000 increased the enzymatic activity of tryptophan synthase. The enzymatic activity of tryptophan synthase was enhanced 25.2% by 10 g L−1 PEG 2000. Reaction conditions were optimized by...
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