| 绿茶揉捻叶的水分解吸和吸附特性 |
| |
| 引用本文： | 罗龙新,殷鸿范. 绿茶揉捻叶的水分解吸和吸附特性[J]. 茶叶科学, 1992, 12(2): 151-158. DOI: 10.13305/j.cnki.jts.1992.02.009 |
| |
| 作者姓名： | 罗龙新 殷鸿范 |
| |
| 作者单位： | 中国农业科学院茶叶研究所,中国农业科学院茶叶研究所 杭州310008 ,杭州310008 |
| |
| 摘 要： | 对揉捻叶在20、30、40℃及不同的水分活度(0.11—0.98)下的解吸和吸附特性进行了研究,结果表明,揉捻叶的等温解吸和吸附曲线符合 Halsey 方程,解吸和吸附过程存在着滞后现象。在相同的水分活度下(等压线),温度升高,平衡含水率下降;在相同的平衡含水率下(等量线),温度升高,相对湿度则降低。同时,解吸和吸附过程中的焓随含水率的下降而增加。此外,温度和相对湿度对解吸和吸附速率有明显的影响。本文还对揉捻叶的解吸和吸附特性与茶叶品质及花茶窨制技术的关系进行了讨论。
|
| 关 键 词： | 揉捻叶 解吸 吸附 平衡含水率 水分活度 |
Properties of the Moisture Desorption and Adsorption for Rolled Leaves of Green Tea |
| |
| Luo Longxin,Yin Hongfan. Properties of the Moisture Desorption and Adsorption for Rolled Leaves of Green Tea[J]. Journal of Tea Science, 1992, 12(2): 151-158. DOI: 10.13305/j.cnki.jts.1992.02.009 |
| |
| Authors: | Luo Longxin Yin Hongfan |
| |
| Abstract: | The properties of moisture desorption and adsorption for rolled leaves ofgreen tea were studied under different temperatures(20,30,40℃)anddifferent water activities(0.11—0.98).Results showed that the desorptionand adsorption isotherm pattern for rolled leaves were suitably expressed byHalsey equation.The desorption and adsorption process existed hysteresisphenomenon.Under the same Aw(isobar),equilibrum moisture content(EMC)decreased when the temperature increased.The relative humiditybecame lower as the temperature rised on the same equilibrium moisturecontent(isopleth).Enthalpy of desorption and adsorption process incr-eased as EMC decreased.The effects of temperature and relative humidityon the rate of desorption or adsorption were significant.The relation ofthe properties of desorption and adsorption to tea quality and scented teatechnique were also disscussed in this paper. |
| |
| Keywords: | Rolled leaves Desorption Adsorption Equilibrium moisture content Water activity |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《茶叶科学》浏览原始摘要信息 |
|
点击此处可从《茶叶科学》下载全文 |
|
