水分活度对全脂羊奶粉贮藏期间脂肪稳定性的影响
详细信息Effect of water activity on the stability of fat in whole goat milk powder during storage
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摘要: 采用加速氧化的方法研究水分活度对全脂羊奶粉贮藏期间脂肪稳定性的影响。通过测定全脂羊奶粉的酸值、过氧化值、硫代巴比妥酸值(TBA)、颜色等指标评价全脂羊奶粉贮藏期间的氧化状况。结果表明,水分活度为0.32的全脂羊奶粉贮藏期间酸值、TBA值显著高于水分活度为0.11和0.23的全脂羊奶粉(p<0.05),且水分活度为0.32的全脂羊奶粉过氧化值变化速率较快(p<0.05),且褐变严重。因此,降低全脂羊奶粉的水分活度可以提高其贮藏稳定性。Abstract: The stability of fat in whole goat milk powder during storage was investigated at water activity with accelerated oxidation test.The acid value, peroxide value, TBARS, color of whole goat milk powder were used for evaluation of oxidation and quality in milk powder during storage.The results showed that the acid value, thiobarbituric acid (TBA) of whole goat milk powder at water activity 0.32 was significantly higher than others (p<0.05) .The rate of peroxide value was higher than others (p<0.05) .Browning reaction of whole goat milk powder happened seriously.The stability of whole goat milk powder could improve by reducing its water activity.
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[1] 顾浩峰, 张富新, 梁蕾, 等.山羊奶与牛奶和人奶营养成分的比较[J].食品工业科技, 2012, 33 (8) :369-373. [2] Liang Jer-Hour.Kietics of fluorescence formation in whole milk powders during oxidation[J].Food Chemistry, 2000, 71:459-463.
[3] Nadal M R, Servin J L.Oxidation stability of the lipid fraction in milk powder formulas[J].Food Chemistry, 2007, 100:756-763.
[4] 葛武鹏.山羊乳营养特性及对嗜酸乳杆菌增酸发酵性能的研究[D].杨凌:西北农林科技大学, 2008. [5] Lloyd M A, Hess S J, Drake M A.Effect of nitrogen flushing and storage temperature on flavor and shelf-life of whole milk powder[J].Journal of Dairy Science, 2009, 92 (6) :2409-2422.
[6] Celestino E L, Iyer M, Roginski H.The effects of refrigerated storage of raw milk on the quality of whole milk powder stored for different periods[J].International Dairy Journal, 1997, 7:119-127.
[7] 刘庆生, 王加启, 卜登攀.牛奶乳脂肪氧化的影响因素研究进展[J].食品科学, 2009, 30 (23) :443-446. [8] Stapelfeldt H, Nielsen B R, Skibsted L H.Effect of hea treatment, water activity and storage temperature on the oxidative stability of whole milk powder[J].International Dairy Journal, 1997, 7 (5) :331-339.
[9] 徐玮, 汪东风.食品化学实验与习题[M].北京:化学工业出版社, 2008:10. [10] GB5530-2005/ISO660:1996.动植物油脂酸值和酸度的测r t定[S].北京:国家标准. [11] GB/T5538-2005/ISO3960:2001.动植物油脂过氧化值的测定[S].北京:国家标准. [12] GB/T5009.181-2003.猪油中丙二醛的测定[S].北京:国家标准. [13] Fenaille F, Mottier P.Comparison of analytical techniques to quantify malondialdehyde in milk powders[J].Journal of Chromatography A, 2001, 921:237-245.
[14] Celestino E L, Iyer M, Roginski H.Reconstituted UHT-treated Milk:Effects of raw milk, powder quality and storage conditions of UHT Milk on its physico-chemical attributes and flavour[J].International Dairy Journal, 1997, 7:129-140.
[15] Sonntag NOV.Reactions of fats and fatty acids in Bailey’s industrial oil and fat products[M].New York:John Wiley and Sons, 1979:99-176.
[16] Rosell J B.Rancidity in foods[M].London:Elsevier Applied Science, 1989.
[17] Lloyd M A.Flavor and stability of whole milk powder[D].North Carolina State University, 2008.
[18] Kneifel W, Ulberth F.Tristimulus colour reflectance measurement of milk and dairy products[J].dairy science and technology, 1992, 72 (4) :383-391.
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