山羊全脂奶粉以及以山羊奶为基础的婴儿配方奶粉和后续配方奶粉中非蛋白氮部分的组成。

Composition of the non-protein nitrogen fraction of goat whole milk powder and goat milk-based infant and follow-on formulae.

作者信息

Prosser Colin G, Mclaren Robert D, Frost Deborah, Agnew Michael, Lowry Dianne J

机构信息

AgResearch, Private Bag 3123, Hamilton, New Zealand.

出版信息

Int J Food Sci Nutr. 2008 Mar;59(2):123-33. doi: 10.1080/09637480701425585.

DOI:10.1080/09637480701425585

PMID:17852511

Abstract

The non-protein nitrogen fraction of goat whole milk powder and of infant and follow-on formulae made from goat milk was characterized and compared with cow milk powder and formulae. Goat milk infant formula contained 10% non-protein nitrogen, expressed as a proportion of total nitrogen, compared with 7.1% for cow milk formula. Goat follow-on formula contained 9.3% and cow 7.4% non-protein nitrogen. Urea, at 30%, was quantitatively the most abundant component of the non-protein nitrogen fraction of goat milk and formulae, followed by free amino acids at 7%. Taurine, glycine and glutamic acid were the most abundant free amino acids in goat milk powders. Goat milk infant formula contained 4 mg/100 ml total nucleotide monophosphates, all derived from the goat milk itself. Goat milk has a very different profile of the non-protein nitrogen fraction to cow milk, with several constituents such as nucleotides at concentrations approaching those in human breast milk.

摘要

对山羊全脂奶粉以及由山羊奶制成的婴儿配方奶粉和后续配方奶粉中的非蛋白氮部分进行了表征，并与牛奶粉和配方奶粉进行了比较。山羊奶婴儿配方奶粉中，非蛋白氮占总氮的比例为10%，而牛奶配方奶粉为7.1%。山羊奶后续配方奶粉含9.3%的非蛋白氮，牛奶的为7.4%。尿素占山羊奶及其配方奶粉非蛋白氮部分的30%，是含量最丰富的成分，其次是游离氨基酸，占7%。牛磺酸、甘氨酸和谷氨酸是山羊奶粉中含量最丰富的游离氨基酸。山羊奶婴儿配方奶粉含有4毫克/100毫升的总核苷酸单磷酸，均来自山羊奶本身。山羊奶的非蛋白氮部分与牛奶有很大不同，其几种成分如核苷酸的浓度接近人乳中的浓度。