原创《烤烟变黄期叶绿素降解动力学分析》：这篇叶绿素论文范文为免费优秀学术论文范文,可用于相关写作参考。
摘 要：为研究不同烤烟品种的变黄特性和预测变黄期烟叶叶绿素含量变化,通过分析不同品种（红花大金元、K326和云烟85）在不同变黄温度（34 ℃、36 ℃、38 ℃、40 ℃和42 ℃）下烟叶叶绿素含量变化,建立了烟叶叶绿素降解动力学模型.试验结果表明：（1）随着变黄温度的升高烟叶叶绿素降解加快,变黄温度较低时（34 ℃、36 ℃）烟叶叶绿素降解存在延滞期,高温变黄（40 ℃、42 ℃）不存在延滞期；相同变黄温度下,云烟85烟叶叶绿素降解最快,K326次之,红花大金元最慢.（2）利用一阶反应模型可以很好地描述变黄期烟叶叶绿素含量变化,随着变黄温度升高烟叶叶绿素降解半衰期t1/2缩短,红花大金元、K326和云烟85烟叶叶绿素降解活化能分别为61.76、56.20和53.16 kJ/mol；（3）试验建立了基于温度波动变化的叶绿素降解反应模型,为预测实际变黄过程中烟叶叶绿素含量变化提供理论参考.
关键词：烤烟；变黄期；叶绿素；降解动力学；模型
中图分类号：TS44+1文章编号：1007-5119（2017）04-0086-06DOI：10.13496/j.issn.1007-5119.2017.04.014
Abstract： In order to study the yellowing characteristics ofdifferent tobacco varieties and predict the changes of chlorophyll content during the yellowing stage. Changes of flue-cured tobacco leaves’ chlorophyll content in different varieties （Honghuadajinyuan, K326, Yunyan85） under different yellowing temperature （34 ℃, 36 ℃, 38 ℃, 40 ℃and 42 ℃） were analyzed, and the degradation kinetic model of flue-cured tobacco leaves’ chlorophyll was established. The results showed that flue-cured tobacco leaves’ chlorophyll content got a faster degradation with the increase of yellowing temperature. There was a lag phase of flue-cured tobacco leaves’ chlorophyll degradation at the low yellowing temperature （such as 34 ℃ and 36 ℃）, however, there was no lag phase at the high yellowing temperature （such as 40 ℃ and 42 ℃）. The chlorophyll degradation of the Yunyan-85 variety was the fastest, followed by the variety of K326, and the variety of Honghuadajinyuan got the slowest degradation. The first-order reaction kinetic model can well describe the variation of flue-cured tobacco leaves’ chlorophyll content during the yellowing stage.The half-life（t1/2）of flue-cured tobacco leaves’ chlorophyll degradation was shortened with yellowing temperature increased. The chlorophyll degradation activation energy of the varieties of Honghuadajinyuan, K326 and Yunyan85 leaf were 61.76, 56.20 and 53.16 kJ/mol respectively. The chlorophyll degradation reaction model based on the variation of temperature fluctuation was established in the test, which could provide a theoretical reference for the accurate prediction of the changes of chlorophyll content in tobacco leaves during the yellowing stage.
Keywords：flue-cured tobacco； yellowing stage； chlorophyll； degradation kinetics； model
變黄是烟叶烘烤过程的主要任务之一,烟叶变黄主要和叶绿素的降解有关[1].通常烘烤过程中烟叶叶绿素不断被降解、含量逐渐减少,类胡萝卜素虽然也发生降解,但其降解较慢、降解量小,致使类胡萝卜素等 素比例增加,烟叶逐渐呈现 [1-2].叶绿素含量也是衡量烤后烟叶品质的主要指标[3-4],叶绿素含量较高时,烤后烟叶外观等级较差,评吸时青杂气明显.变黄期是烟叶色素降解的关键时期,烟叶有80%以上的叶绿素被降解[1],因此研究变黄期烟叶叶绿素的降解特性具有重要意义.
叶绿素论文参考资料：
结论：烤烟变黄期叶绿素降解动力学分析为关于叶绿素方面的的相关大学硕士和相关本科毕业论文以及相关swisse叶绿素能减肥吗论文开题报告范文和职称论文写作参考文献资料下载。
