How surface composition of high milk proteins powders is influenced by spray-drying temperature
How surface composition of high milk proteins powders is influenced by spray-drying temperature
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DOI：
10.1016/j.colsurfb.2009.09.016
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发表时间：
2010-01-01
影响因子：
5.8
通讯作者：
Scher, J.
中科院分区：
文献类型：
--
作者：
Gaiani, C.;Morand, M.;Scher, J.
高牛奶蛋白粉是许多食品中的常见成分。这些粉末的表面成分预计在其储存过程中发挥重要作用。因此，通过改变喷雾干燥温度最终控制表面成分对于提高粉末质量和开发新应用非常有用 为此，通过 X 射线光电子能谱研究了五种喷雾干燥温度对粉末表面成分的影响 研究了主要的牛奶蛋白天然胶束酪蛋白和天然乳清，两者都或多或少富含乳糖 结果显示所有粉末的脂质和蛋白质的表面富集对于许多粉末而言，无论干燥温度如何。脂质和蛋白质优先位于表面附近，而乳糖存在于内圈中。这种表面富集也受到喷雾干燥温度的高度影响。在较低出口空气温度下喷雾干燥的粉末表面系统地观察到更多的脂质、更多的蛋白质和更少的乳糖。蛋白质的性质也被发现是重要的，含有乳清蛋白的粉末的西南面脂质富集比含有酪蛋白的粉末更强。此外，我们发现所研究的 25 种粉末的脂质表面浓度与润湿能力之间存在直接相关性 (C) 2009 Elsevier B V 所有紧身衣保留
High milk proteins powders are common ingredients in many food products The surface composition of these powders is expected to play an essential role during their storage. handling and/or final application Therefore, an eventual control of the surface composition by modifying the spray-drying temperature could be very useful in the improvement of powder quality and the development of new applications For this purpose, the influence of five spray-drying temperatures upon the surface composition of the powders was investigated by X-ray photoelectron spectroscopy The major milk proteins were studied native micellar casein and native whey, both more or less enriched in lactose The results show a surface enrichment in lipids for all the powders and in proteins for many powders Whatever the drying temperature. lipids and proteins are preferentially located near the surface whereas lactose is found in the cote This surface enrichment is also highly affected by the spray-drying temperature More lipids, more proteins and less lactose are systematically observed at the sur face of powders spray-dried at lower outlet air temperatures The nature of proteins is also found essential, SW face enrichment in lipids being much stronger for whey proteins containing powders than for casein containing powders. Additionally, we found a direct correlation between the lipids surface concentration and the wetting ability for the 25 powders studied (C) 2009 Elsevier B V All tights reserved