精品文档---下载后可任意编辑摘 要色素在植物体中大量分布，并参加植物体的生物活动。而不同植物具有合成适应自身特点的有机色素分子的能力各有差异，因此，不同的植物就表现出不同的体色及花色，从而使大自然呈现出姹紫嫣红的漂亮景色。本文在对植物色素变色行为方面文献进行讨论的基础上，对几种颜色鲜亮的植物进行色素提取，通过测定不同植物色素在不同 pH 值溶液中的变色行为，并分析其在不同条件下的吸收光谱，探讨影响植物变色的各种因素以及相应的分子结构。本实验通溶液浸取法提取各种色素，讨论色素变色的 pH 范围及其稳定性。选取以下几种植物进行讨论：紫甘蓝、红提皮、香槐花、月季花。关键词：植物色素 变色行为 稳定性精品文档---下载后可任意编辑Study on Discoloration of Plant pigmentAbstractPigment in plants body mass in a distribution, and participate in the plant body biological activities. Different plants have the ability to adapt to the characteristics of the synthesis of organic pigment molecules vary, therefore, different plants exhibit different colors and designs, so that nature presents a beautiful view of the beautiful flowers. This article in terms of plant pigments to color documents on the basis of the study, on several bright color pigment in plants, through different solution in different pH values of plant pigments to color, and analysis of their absorption Spectra under different conditions, explore factors affecting plant color and the corresponding molecular structure. This experimental-pass solution leaching method extracting pigment, study on the pH range and stability of pigment to color. Selecting several plants to study: purplecabbage, grape red skin, Wilson Yellow-wood flowers, monthly rose flowers.Key words: Plant pigment discoloration stability目 录1 引言 1 1.1 天然色素概述 1 1.2 天然产物的提取方法 1 1.2.1 天然产物的溶剂提取法 2 1.2.2 水蒸气蒸馏法 3 1.2.3 沉淀法 3 1.2.4 盐析法 3 1.2.5 透析法 3 1...
