超高温瞬时灭菌技术(ultra high temperature,UHT)在植物乳制品领域的应用备受关注.然而,关于UHT对植物乳制品品质特性的影响并未探明.为解决植物基酸奶在灭菌过程中存在的蛋白过度变性和微生物残留问题,研究了1∶8、1∶10、1∶12、1∶14、1∶16共计5个料液比梯度的核桃酸奶,探讨了UHT处理下不同料液比对搅拌型核桃酸奶品质的影响.研究结果显示,在不同料液比下,核桃酸奶的pH和酸度在发酵过程中表现出一致的趋势.料液比为1∶12时,核桃酸奶具有最高的硬度、稠度和持水性,分别为211.37 g、464.51 g·s和83.54%,相对于其他料液比有效地改善了核桃酸奶的品质特性.料液比为1∶8时,核桃酸奶具有最小的粒径,为37.63 µm.综上,通过对核桃酸奶进行UHT处理并使用适宜的料液比,可以明显地改善核桃酸奶的品质特性.研究结果可为搅拌型核桃酸奶产品的生产提供关键的实验数据和理论支持,并为相关领域的学术研究和工业应用提供参考.
Effect of Feed-to-liquid Ratio on the Quality Characteristics of Stirred UHT Walnut Yogurt
The application of ultrahigh temperature transient(UHT)sterilisation technology in the field of plant-based dairy products has attracted much attention.However,the effect of UHT on the quality characteristics of plant-based dairy prod-ucts has not been explored.In order to solve the problems of excessive protein denaturation and microbiological residue prob-lems during the sterilisation process of plant-based yoghurt,the present experiments investigated walnut yoghurt with differ-ent feed-liquid ratios of 1∶8,1∶10,1∶12,1∶14 and 1∶16 totalling five feed-liquid ratio gradients,and explored the effects of UHT treatment and different feed-liquid ratios on the quality of stirred walnut yoghurt.The results showed that the pH and acidity of walnut yoghurt exhibited consistent trends during fermentation at different feed ratios.The highest hardness,consistency and water-holding capacity of walnut yoghurt with 211.37 g,464.51 g·s and 83.54%,respectively,were obtained at the feed-liquid ratio of 1∶12,which effectively improved the quality characteristics of walnut yoghurt relative to other feed-liquid ratios.The walnut yoghurt had the smallest particle size of 37.63 µm at a feed-liquid ratio of 1∶8.Overall,the quality characteris-tics of walnut yoghurt can be significantly improved by UHT treatment of walnut yoghurt and the use of appropriate feed-liq-uid ratios.The results of this study can provide key experimental data and theoretical support for the production of stirred wal-nut yoghurt products,as well as provide references for academic research and industrial applications in related fields.
万方数据
维普
