Yan-hong Bai1, Dian-bo Zhao1 and He-ping Zhang2
1College of Food and Biological Engineering, Zhengzhou University of Light Industry,
Dongfeng Road, Zhengzhou, Henan, P.R., China
2College of Food Science and Engineering, Inner Mongolia Agriculture University, Hohhot, P.R., China
ABSTRACT
The milk of Alxa bactrian camels reared in Inner Mongolia during different lactation stage were analysed for specific gravity, pH, titrable acidity, electrical conductivity and the composition of amino acids. Meanwhile, the composition of shubat prepared from camel milk was also determined. The values of specific gravity, pH and titrable acidity were 1.055 to 1.034, 6.31 to 6.53 and 0.17 to 0.24 of colostrums from 2h to 7d post partum (PP), respectively, and the respective mean values of regular milk were 1.032 to 1.034, 6.31 to 6.57 and 0.17 to 0.20%. The total content of Na+, K+and Cl- was responsible for most of electrical conductivity in Alxa bactrian camel milk. The values content of histidine, arginine, threonine, valine, methionine, isoleucine, leucine, phenylalanine and lysine at the first milking were 2.50, 4.94, 6.50, 6.52, 2.10, 4.05, 7.94, 4.38 and 7.40 g/100 g, respectively, and the respective mean values of milk (90d PP) were 2.64, 4.11, 4.52, 6.20, 3.16, 5.61, 9.48, 4.73 and 7.75 g/100 g. The ratio of essential to non- essential amino acids, cystine to methionine and phenylalanine to tyrosine in Alxa bactrian camel milk (90d PP) were 0.97, 0.34 and 1.19, respectively, and the respective mean values of shubat were 1.11, 0.28 and 1.86.
Key words: Alxa bactrian camel, amino acid composition, camel milk, physical parameters, shubat
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