The article introduces on molecular structure and the molecular basis of Nisin bacteriostasis,and the progress on genetic research of biological synthesis of Nisin.with attempt to more comprehensively discuss the present and future of Nisin.

This paper makes use of orthogonal test to confirm the optimum conditions for hydrolyzing casein by using immobilized enzyme,and studies the process and conditions for extraction and purification from hydrolysate to produce CPP.The results of CPP produced by ourselves are as follows:The molecular weight of Q -CPP is 5000, whose content is 1l%.The molecular weight ofβ -CPP is 3300,whose content is 4%.The total phosphorus is 3.64%.The total nitrogen is 6.97%.The value of N/P is 4.23.

This review focused on tile development of lipoxygenase (L.OX).such as characteristics,distribution in plant,physiological t’unction,melllods of activity determination and the roles on l’ood storage and processing.EIY’ccts of LOX reaction on food color.flavol’ and nutrition had also been reviewed and some new ideas offurther development and application of LOX were put forward

he scavenging effects of’ grape seed and .grape peel water extract on active oxygen superoxide radical (d- )and hydroxyl radical (’ OH ) ’were studied by chemiluminescence assay,and their scavenging effect on 1. 1 Diphenyl-1-2-picryl (DPPH ) was studied by spectrophotometry’.The results show’. that scavenging effects of grape seed and grape peel water extracts on O2’ OH and DPPH’ are strong with quantitative relationship.It indecate that there are some anti-free radical substances present in grape seed and grape peel.Their anti-free radical active orders are fresh grape seed;>grape peel>dry grape seed.

Mannose can be obtained from spent coffee grounds by acid hydrolysis in the high-temperature and shorttime reactoir.Hydrolysis process was work out on the basis of some hydrolysis factors.

Pectinase (polygalacturomase,Ec3.2.1.15 ) from Aspergillus oryzae ac-491 was im1Tlobilized by a wide range of supports .the most promising system provde to be immobilization I on polyvinate alcohol (PVA)hydrogel.The optimal condition for enzyme immobilization was studied.The optimal pH and temperature of the immobilized enzyme were 3.8 and 50℃.respectively.The immobilized enzyme was stable at the range of pH304~5.0,not stable at the temperature higher than 50℃,but the temperature endurance of immobilized enzyme was higher than that of the natural pectinase

In this paper by’ passing through tube culture and biological assay the effects of oxygen-resistand bifidobacterium were studeied.It was found that oxygenresistant bifidobacterium strongly by restrained the activities ofenterotoxigenic F.coli (ETEC) and Stasphylococcus. Heat-labile and heat stable Enterotoxigenorig were biodegradatied by oxygen-resistant bifidobacterium.It was. identified that Enterotoxin was fermented to nutrients.

 The purity and contents of four fractions of LBP of lycium barbarum polysaccharides (LBP) were anal3’scd by spectrophotometric methods.The average recoveries were 99.4%. 1 00.3%. 99.7%. 1 01 .2%. 1 00.7% respectively.The method was convenient rapid accurate and precise.