摘要
为了了解目前国内酵母抽提物产品的性状，比较了国内、外8种不同来源的酵母抽提物的物理性状，溶解性，干湿比，1％水溶液的pH，总氮含量和氨基氮含量，分别将其配成YEPD培养基培养啤酒酵母，测定菌株在不同来源的酵母抽提物培养基中的生物量。经比较发现，部分国内生产的酵母抽提物颗粒的细致程度和水溶液的澄清程度有待提高，部分国内生产的酵母抽提物1％水溶液的pH呈弱酸性，干湿比、总氮含量和氨基氮含量与国外生产的酵母抽提物无明显差别，培养啤酒酵母得到的生物量略优于国外生产的酵母抽提物。故国内生产的酵母抽提物在大部分的生物试验和食品与发酵生产中，可以代替国外生产的酵母抽提物，而且价格仅为进口酵母抽提物的30％～50％。
Some characteristics, such as physical properties, solubility and water content, of yeast extract from eight different producing areas including domestic and oversea factories were compared. The granules of some domestic yeast extract were not as fine as those from oversea factories. The colors of aqueous solution of domestic yeast extract were not the same as the products from oversea. Aqueous solution of yeast extract from OXOID was clear. The pH of 1% solution of domestic yeast extract was 5.5-6.0. The water contents, total nitrogen content and amino nitrogen content of yeast extract from these areas were similar with those from oversea. Saccharomyces cerevisiae YSF-2 and YS58 were cultured respectively in eight types of YEPD which were composed of different yeast extract. The biomass of yeast which was cultured in YEPD with do- mestic yeast extract was better. The yeast extract produced by domestic factories can take place of the yeast extract from abroad in general biochemistry experiments.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2007年第2期68-70,共3页
Food and Fermentation Industries
关键词
酵母抽提物
总氮含量
氨基氮含量
生物量
yeast extract, total nitrogen content, amino nitrogen content, biomass
