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  • 标题:Corn germ with pericarp in relation to whole corn: nutrient contents, food and protein efficiency, and protein digestibility-corrected amino acid score
  • 本地全文:下载
  • 作者:Naves, Maria Margareth Veloso ; Castro, Maiza Vieira Leão de ; Mendonça, Aline Luiz de
  • 期刊名称:Food Science and Technology (Campinas)
  • 印刷版ISSN:0101-2061
  • 电子版ISSN:1678-457X
  • 出版年度:2011
  • 卷号:31
  • 期号:1
  • 页码:264-269
  • DOI:10.1590/S0101-20612011000100040
  • 语种:English
  • 出版社:Sociedade Brasileira de Ciência e Tecnologia de Alimentos
  • 摘要:

    The germ fraction with pericarp (bran) is generated in the industrial processing of corn kernel, and it is used for oil extraction and animal feed. This study evaluated the nutritional and protein quality of this fraction in relation to whole corn. The proximate composition, mineral contents, and amino acid profile of the germ fraction with pericarp and of whole corn were determined. A 4-week experiment was conducted using 36 weanling male Wistar rats, and three 10%-protein diets (reference, germ with 15% lipids and casein with 15% lipids), two 6%-protein diets (whole corn and casein), and a protein-free diet were prepared. The germ showed higher contents of proteins, lipids, dietary fiber (27.8 g.100 g-1), ash, minerals (Fe and Zn- approximately 5 mg.100 g-1), and lysine (57.2 mg.g-1 protein) than those of corn. The germ presented good quality protein (Relative Protein Efficiency Ratio-RPER = 80%; Protein Digestibility-Corrected Amino Acid Score-PDCAAS = 86%), higher than that of corn (RPER = 49%; PDCAAS = 60%). The corn germ fraction with pericarp is rich in dietary fiber, and it is a source of good quality protein as well as of iron and zinc, and its use as nutritive raw material is indicated in food products for human consumption.

  • 关键词:Zea mays;milho;nutrientes;proteína;aminoácidos;avaliação biológica
  • 其他关键词:Zea mays;maize;nutrients;protein;amino acids;biological evaluation
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