共查询到18条相似文献,搜索用时 46 毫秒
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速溶茶的冷冻干燥工艺 总被引:9,自引:0,他引:9
速溶茶的冷冻干燥工艺胡益民,夏广玲,朱军深圳万保真空保鲜设备有限公司5180201.前言作为一种传统的世界性饮料,茶一直受到人们的喜爱。随着人们生活水平的提高和饮食习惯的改变,速溶茶以及以速溶茶为原料的混合速溶饮品越来越受欢迎。由于茶的色香味特别敏感... 相似文献
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主要介绍了HACCP在速溶茶粉生产中的应用,通过生产过程的监控,消除了物理、化学、生物的危害.生产出安全的保健速溶茶粉。 相似文献
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速溶茶冷冻干燥最佳操作条件的研究 总被引:5,自引:1,他引:5
本文介绍了速溶茶的冻干实验研究,获得了其最佳冻干曲线,最佳茶液浓度、最佳冻干厚度和最佳冻干压力,为工业上生产速溶茶提供了良好的基础数据。 相似文献
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为了提高普洱茶有效成分的提取,提高冲泡便捷性,本文采用加压热浸提法研究普洱茶多酚的最佳浸提工艺,将浸提液进一步干燥处理得到速溶茶粉,并对其进行感官分析及氨基酸和香气组分的分析。结果表明普洱茶多酚和水浸出物的最佳浸提条件为:温度130℃,时间30 min,压强0.185 MPa,料液比1∶25(g/m L),此条件下,普洱茶提取液中茶多酚含量为7.6%,水浸出物含量可达到30.3%。在最佳浸提条件下经过冻干后的茶粉冲泡液的滋味、香气和汤色与普洱原茶无显著差异。冻干处理的普洱茶浸提样中游离氨基酸总量比喷雾干燥样品中游离氨基酸含量高,且差异显著。不同干燥方式下的茶样香型特征差异较大,冻干对样品中的香气物质起到显著的保护作用。本文在茶叶香气滋味组分最大保留的前提下,为开发高氨基酸速溶茶,促进我国茶产业精深加工提供一定的理论依据。 相似文献
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《Food microbiology》1987,4(1):19-33
The microbial ecology of an instant tea line was studied using samples from different points of the line. Only lactic acid bacteria were found at certain manufacturing stages. The main contaminant was identified as Lactobacillus plantarum. As no other bacteria were found in this line, lactic acid bacteria may be considered as quality ‘indicators’ and their determination might be a means to monitor Good Manufacturing Practices (GMP). In addition, the total tea solids (TS) concentration that inhibits the growth of certain isolated L. plantarum strains was determined on the instant tea line. A TS concentration of 60% inhibited these organisms during 48 h. The same TS concentration did not inhibit the growth of a non-identified cluster of Lactobacilli isolated from the same line.The bacteriostatic effects of pure theophylline and pure theobromine on the growth of L. plantarum were also examined. No bacteriostatic effect in the presence of either compound was observed at normal concentration or at concentrations higher than those calculated to be normally present in tea lines.The standard aroma profile of an instant tea solution was modified as a result of inoculation with a wild strain of L. plantarum. This implies that heavy contamination and fermentation by such organisms might result in products with altered aroma profiles that are unacceptable to the consumer.It should be noted that altered tea aroma might eventually be used as an indicator of microbial build-up by analysing certain of the altered aroma components. Further work is needed to investigate this possibility.Challenge tests with known pathogens and spoilage organisms revealed that, although pathogens were unable to multiply in instant tea solutions, spoilage organisms could grow or survive and thus might pose problems. 相似文献
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速溶茶提取技术研究进展 总被引:1,自引:0,他引:1
提取是速溶茶生产的一个关键环节,提取效果的好坏将直接影响到后续的生产过程,进而影响速溶茶的最终品质。本文对速溶茶主要物质浸出机理及速溶茶的传统提取方式进行了简要介绍。对提高速溶茶提取效率、改善茶汤品质具有积极作用的新技术,包括超声波、微波、超高压、生物酶辅助技术,文章重点阐述了原理、特点及其在速溶茶提取中的应用进展,并简单讨论了各提取技术的优缺点。此外,简要阐述了原料性状及原料加工工艺对茶叶内含物质浸出的影响。并对影响速溶茶浸提效果的提取参数,如茶叶粒度、浸提时间、浸提温度、茶水比、提取次数及p H值等进行了综述。为速溶茶生产现状的改善、高新提取技术的深入研究及其在速溶茶工业化生产中的大规模应用提供一定参考。 相似文献