Curd Formation from Soymilk Combined with Bovine Milk and its Ripening.

Accession number;00A0213856
Title;Curd Formation from Soymilk Combined with Bovine Milk and its Ripening.
Author; WATANABE YOKO (Tokyo Metropolitan Coll, JPN) SEKIGUCHI MASAKATSU (Kawamura Jr. Coll.) MATSUOKA HIROATSU (Jumonji-Gakuen Women's Jr. Coll.)
Journal Title;Journal of the Japanese Society for Food Science and Technology
Journal Code:F0895A
ISSN:1341-027X
VOL.47;NO.1;PAGE.30-36(2000)
Figure&Table&Reference;FIG.4, TBL.3, REF.13
Pub. Country;Japan
Language;Japanese
Abstract;This study was carried out to apply lactic fermentation to curd formation from soymilk combined with bovine milk. The combined milks consisting of one to four volumes of bovine milk and four volume of soymilk provided effective curd formation by lactic fermentation. The curd prepared by combining one volume of bovine milk with four volumes of soymilk was ripened using P. caseicolum at 15.DEG.C. for 1 week and successively at 5.DEG.C. for 2 weeks. Approximately 80% of phytate and 60% of calcium in the combined milk moved to the curd. Hardness, shear stress, gumminess, chewiness etc. of the curd were lower than those of soymilk curd as a reference. Scanning electron microscopic observation showed the curd had a densely packed structure with few empty space, as compared with soymilk curd or bovine milk curd. In a 3 week's ripened curd, water soluble nitrogen ratio to the total nitrogen reached to approximately 30%. SDS-PAGE patterns also showed extensive proteolysis of soymilk and bovine milk proteins during ripening. Total free amino acid content in the 3 week's ripened curd was 3785 mg/100 g, being equivalent to 1.5 times of that in a 3 week's ripened soymilk curd. Hydrophobic amino acids were highly liberated and the amount of serine contained in the curd was 10 times higher than that in soymilk curd. (author abst.)