2011 Fiscal Year Final Research Report

Study on occurrence factor and prevention against lipid oxidation of raw milk during preservation period

Research Project

Project/Area Number	21780241
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Zootechnical science/Grassland science
Research Institution	Hokkaido University
Principal Investigator	MITANI Tomohiro 北海道大学, 大学院・農学研究院, 特任助教 (80451409)
Project Period (FY)	2009 – 2011
Keywords	栄養・飼養 / 酪農生産システム / 畜産学 / 農林水産物
Research Abstract	In dairy industry, a quality deterioration occurred by lipid oxidation of raw milk become a problem. This study objected to investigate an occurrence factor and prevention against lipid oxidation of raw milk during preservation period. Hexanal yielded at final step of lipid oxidation was produced from polyunsaturated fatty acids(PUFA) through a peroxide lipid. For milk containing a lot of highly-unsaturated fatty acid such as linolenic acid, hexanal was yielded at early preservation period. Conversely, for milk containing a lot of PUFA such as linoleic acid, hexanal was yielded 3 or 5 days after refrigerated storage. It is known that feeding regime for dairy cows strongly affected on fatty acid profile of milk. It would be considered usage and distribution of raw milk which is produced from different feeding regime.

(4 results)