文章基本信息

标题：Composition and Nutritive Value of Yeast Biomass and Yeast Protein Concentrates
本地全文：下载
作者：Maria Teresa B. PACHECO ; Glenys Mabel CABALLERO-CÓRDOBA ; Valdemiro Carlos SGARBIERI 等
期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：1997
卷号：43
期号：6
页码：601-612
DOI：10.3177/jnsv.43.601
出版社：Center for Academic Publications Japan
摘要：Yeast biomass ( Saccharomyces sp.) produced in local breweries as a by-product was utilized in this study. Percent proximate composition, amino acid composition, and protein nutritive value were determined for the yeast cell biomass (YC), a sodium perchlorate extracted and isoelectrically precipitated protein concentrate (P-PC), and a sodium trimetaphosphate treated extract followed by isoelectrical precipitation (TMP-PC). Protein concentrates averaged 75% protein as compared to 48.5% in the yeast biomass. Precipitation of the protein in the presence of either sodium perchlorate or sodium trimetaphosphate was reduced to 71% and 51% of the cell RNA content, respectively. Protein nutritive value was 70% of casein when measured by the protein efficiency ratio (PER), and over 90% of casein when net protein utilization (NPUa) was the criteria of evaluation.
关键词：yeast composition;biomass;protein concentrate;nutritive value