摘要:
A method for the production of a pullulanase-like enzyme possessing an .alpha.-amylase activity from a strain of genus Bacillus subtilis, the produced enzyme being capable of acting on starch to enhance the yield of glucose.
摘要:
The gene coding for a thermostable pullulanase enzyme is incorporated into chimeric plasmids which are inserted into and reproduced by E. coli or B. subtilis host microorganisms. When microorganisms containing the chimeric plasmids are grown in fermentation media, they produce the pullulanase enzyme.
摘要:
A debranching enzyme (pullulanese) useful in the preparation of a low calorie beer may be obtained from rice by extraction of the rice with an aqueous buffer system having a pH of about 6. A preferred buffer system is 0.1 M potassium phosphate-0.2 M-sodium chloride. Extraction is preferably carried out at a temperature of about 50.degree. C. for about 3 hours. When malted rice is used as the enzyme source a particularly useful mixture of the debranching enzyme and alpha 1,4 carbohydrases is obtained.
摘要:
A microorganism which simultaneously produces .beta.-amylase and dextrin .alpha.-1,6-glucosidase is cultured. By use of the enzymes thus produced, starch is directly hydrolyzed into maltose in a high yield.
摘要:
Upon storage, the activity of immobilized enzymes slowly decreases in the presence of moisture. This decrease in activity can be reduced by a significant extent by treating the immobilized enzymes in the presence of moisture with a long chain quaternary ammonium compound.
摘要:
The present invention relates to a process for the extraction of enzymes from microorganisms which is characterized in that an urea solution is used in the extraction of intracellular enzymes produced in cells of microorganisms.
摘要:
PRODUCTION OF ISOAMYLASE BY FERMENTATION OF A MICROORGANISM BELONGING TO ESCHERICHIA INTERMEDIA IN A CULTURING MEDIUM AT 20*-40*C. AND AT PH 6-9. THE ISOAMYLASE IS AN ENZYME WHICH DECOMPOSES THE A-1,-6-LINKAGE OF STARCH.
摘要:
UTILIZATION OF PHYTATE FILTRATE AND/OR STEP LIQUOR AS THE PRINCIPAL NITROGENOUS MATERIAL FOR THE PRODUCTION OF AMYLO-1,6-GLUCOSIDASE, COMPRISING (1) BRINGING TOGETHER IN AN AQUEOUS MEDIUM INDUCED CELLS CAPABLE OF PRODUCING AMYLO-1,6-GLUCOSIDASE AND AT LEAST ONE NITROGENOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF STEEP LIQUOUR AND PHYTATE FILTRATE AND (2) INCUBATING AT PH 6.0 TO 8.1 TO PRODUCE AMYLO-1,6-GLUCOSIDASE.
摘要:
METHOD OF PRODUCING AMYLO-1,6-GLUCOSIDASE, WHEREIN AN INOCULUM OF A CULTURE CAPABLE OF PRODUCING AMYLO-1,6GLUCOSIDASE, IS PROPAGATED WITHOUT FORMING ENZYME IN AN AQUEOUS MEDIUM SUBSTANTIALLY FREE OF MALTOSE, MALTOTRIOSE AND PULLULAN COMPRISING DEXTROSE AS THE PRINCIPAL CARBOHYDRATE SOURCE AND INDUCING THE CELLS TO FORM AMYLO1,6-GLUCOSIDASE IN AN AQUEOUS MEDIUM CONTAINING MALTOSE, MALTOTRIOSE OR PULLUIAN.
摘要:
The present invention makes it possible to separate short-chainlength amyloses and long-chain-length amyloses from starches by decomposing and cutting off the Alpha -1,6-glucoside bonds of amylopectin contained in starches by means of an Alpha -1,6glucosidase to form short-chain-length amyloses differing in molecular weight from the naturally occuring amyloses and making use of the difference in molecular weight in those two shorts of amyloses.