ABSTRACT
It was concerned with recent progress in the research of chitin/chitosan hydro-lases,which included chitinase ,chitosanase,lysozyme and non-specific hydrolases. Emphasis was placed on isolation and characterization,model of action,kinetics ,immobiliation and gene improvment of these enzymes.
ABSTRACT
AIM To develop a comparative method for studying on the HPLC/UV/MS fingerprints of triterpene acid in the leaves and the seeds of Lagerstroemia specious L. METHODS Separation was performed on LunaC_ 18 (2.6 mm?250 mm, 5 ?)analytical column, The mobile phase was composed of acetonitrile and 0.1 % formic acid as gradient eluent. The flow rate was 1.0 ml?min -1 . RESULTS Both of corosolic acid and maslinic acid existed in the leaves and the seeds of Lagerstroemia specious L. Ursolic acid existed in the leaves and the oleanolic acid contained in the seeds of Lagerstroemia speciouswere L. CONCLUSION The method can be used for quality control of the leaves and the seeds of Lagerstroemia specious L.
ABSTRACT
The physicochemical properties and functional activities of chitooligosaccharides are more superior than chitin and chitosan, so chitooligosaccharides becomes a new developing kind of functional oligosaccharides worldwide in recent years. Research development of the physiological activities of chitooligosaccharides such as antibacterial activity, antitumor activity, protective effect on bacterial infection in vivo , regulation of plant physiology, proliferation of bifidobacteria and anti-mutagenic activity was reported in China and a-broad, meanwhile, application prospect were forecasted as well in the paper.