Abstract:Shakeflask culture conditions of L-lysine fermentation were studied with a mutant of Brevibacterium flavum, aimed at industrial production of Llysine. The optimal concentrations of initial nitrogen sources were obtained by orthogonal experiments. Appropri

Abstract:Maltotetraose is a kind of new maltooligosaccharide. The method of hydrolyzing pretreated starch with Maltotetralhydrolase and pullulanse was optimized by RSA. The maltotetraose is over 84% of total saccharides in the products.

Abstract:The preparation of nongelatinized starch by crosslinking native tapioca starch with phosphors oxychloride is presented.The degree of xubstitution,the curve of Brabender viscosity,the morphology of the crosslinded tapioca starch in boiling water and the di

Abstract:对从土壤中筛选到的菌株ＤＧＣ－００７进行ＵＶ诱变，选育到菌株ＤＧＣ－０４８．对影响突变株产酶的条件进行了优化，初步确定了ＤＧＣ－０４８合适的产酶摇瓶培养基组成．在发酵温度为３０℃，培养基起始ｐＨ７．５～８．０的条件下，接种量１０％，发酵４８ｈ，产酶可达３５０μｍｏｌ／（ｍｉｎ·Ｌ）

Abstract:Production of Pseudomonas sp.JW12 lipase by fedbatch culture was studied in 2 L and 25 L fermentors.When we controlled supernante pH value at 8.2 or so by adjusting carbon source feeding velocity,lipase activity and productivity app were increased effect

Abstract:The indirect ELISA testing method for rapidly detecting Bifidobacterium bifidum has been developed. Mouse polyclonal antibodies against the cell wall from Bifidobacterium bifidum are obtained. The minimum value of Bifidobacterium bifidum 's concentration

Abstract:A bacteria producing pullulanase was isolated from soil with a special method and identified to be Bacillus sp. on the basis of its morphological and physiological characteristics, referring to "Bergey's Mannual of Determinative Bacteriology(8

Abstract:Three parts of xylanases (Part A, Part B and Part C) were separated and purified from a culture filtrate of Pencillium corylophilum No. P331 by ammonium precipitation, DEAESephadex A25 and CMSephadex C50 column chromatography. Part B was further purifie

Abstract:The studies on pretreatment of soil samples were conducted.The optimum concentration of the inhibitor K2Cr2O7 in the plate medium was studied.Results show that the suitable method of the selective isolation of actinomycetes is that,after the collected soi

Abstract:Esterification of sorbitan and oleic acid by lipase in non-aqueous phase under mild reaction conditions was studied initially. Sorbitan was dehydrated previously by controlled chemical process. Lipase-catalyzed esterification was carried out in aqueous ph

Abstract:A simple method suitable to prepare phosvitin from egg yolk on a pilot plant scale was developed, which consisted of the removal of watersoluble proteins, except phosvitin, the removal of lipids, the isolation of phosvitin from the resulted granules with

Abstract:One specie mutants defective of repressible acid phosphatase and the other specie mutant of depressible acid phosphatase was obtained from Candida glycerolgenesis Zhuge (H-), using chemical mutagenesis. And their fermentation properties were studied.

Abstract:A twostage UASB reactor for the treatment of alcohol distilleries' wastewater was studied. Result show that the best process was the combination of one thermophilic UASB reactor with one mesophilic UASB reactor. With the influent COD of 21 00025 700 mg/L,

Abstract:The different removal methods about geosmin, one kind of algae metabolites, were reviewed in this paper. In author's opinion, the photocatalytic degradation is the most suitable method. The feasibility of this method was discussed theoritically and a new

Abstract:The effect of preheating on extraction of Trehalose from raw yeast was studied.After the raw yeast was preheated at a higher temperature the extracting ratio of Trehalose was improved markedly.The extracting ratio of Trehalose was more than 1.2 times as t

Abstract:Polyprrolecarbon fiber (PPyCF) composite film was prepared by using chemical oxidation method at the surface of CF,and its properties were also characterized.The PPyDMCTCF composite film was prepared by polymerizing dimercaptothiodiazole on the surface of

Abstract:A method for the digestion of samples by using PTFE closedvessel microwave oven has been studied.Some factors affecting the digestion effect are selected by orthogonal experiments to get an optimum digestion condition,under which ZnFeMn used for the test

Abstract:The maximum absorbing wavelength, the short analyzing program and the optimal analyzing concentration for analyzing sarcosine by H83550 Amino Acid Analyzer were studied. The reliability of the short analyzing program for analyzing sarcosine was verified.U

Abstract:Based on the discussion of the mechanism and advantage of photomagnet hasten maturation of spirits.A single-chip microcomputer control system has been developed for the photomagnet hasten maturation of spirits. The basic configration, the con

Abstract:It presents the configration and development of IBM SNA from traditional SNA(Subarea) to APPN and its new extension-HPR.Relations between APPN and APPC,three type nodes of APPN and their functions and services are described.In addition,studies on HPR used

Abstract:A new method to design switch power is presented.The method has advantages of high oscilating frequency,being compact,high efficiency and great output power.In addition,the working state of the switch power can be controlled with a computer.

Abstract:The arrangement of shedding angles is an important parameter in designing a tappet.To design a good tappet,it is essential to select proper dwelling angles and moving to make the arrangement of these angles flexible.

Abstract:The causes of the occurrence of vertical streak of silk fabrics made on Tompkin's loop wheel machines have been analysed and suggestion has been made to avoid such vertical streaks in order to improve the quality and to gain high economic profits.

Abstract:The article presents the concept of independent, nonindependent and semiindependent variables for adjusting instruments, analyses their characteristics and relationships. It is very important to analyse carefully,synthesize and shove duly their positions.