叶子花红色素提取工艺的优化

本文研究了用树脂吸附和分离叶子花红色素，比较了4种树脂对叶子花红色素的吸附，在叶子花红色素提取过程中用AB－8树脂吸附，洗脱剂用40％的乙醇，洗脱效果好，且AB－8树脂使用20次后吸附性能仍稳定。     

三角梅在我国的温度适宜分布区划

三角梅为我国南方园林中常见花卉之一,我国虽已有100多年的引种栽培历史,但对其确切抗寒力水平的资料仍显缺乏.对我国广泛栽培的21个三角梅品种进行了模拟低温电导率测定,确定低温致死范围在-2.91℃--5.48℃之间;以三角梅品种普遍致死温度-3℃为依据,采用地理信息系统(GIS)进行了三角梅在我国的温度适宜区划.结果表明,我国三角梅温度最适宜分布区集中在云南西南部临沧、澜沧、普洱等地,广西、广东、福建大部,海南、台湾2岛,以及四川南端西昌、宜宾、重庆等个别地区:可以露地种植的次适宜分布区包括四川、贵州、湖南、江西南部及湖北的恩施、宜昌,浙江温州等局部地区.本研究对于外来花卉引种具有一定指导借鉴意义.     

Comparison of Bougainvillea spectabilis and Bougainvillea glabra species inhibited in Pakistan based on microscopic studies: Light microscope and scanning electron microscope

The anatomical variations of two plants from the Nyctaginaceae family, Bougainvillea spectabilis and Bougainvillea glabra, were studied using light and scanning electron microscopy methods in this work. Bougainvillea is a dicotyledonous with defensive traits that can withstand extreme (hot and dry) settings; according to the findings, crystal inclusions in cells, woody spines, and an abnormal development pattern are all features that help them survive against predators and are unique to this species. The Bougainvillea plant's leaves are arranged in simple pattern, alternate to each other along stem having an undulate leaves edge and an oval form. The xylem and phloem, palisade, parenchyma midrib, spongy mesophyll, raphide crystal bundles, and trichomes were all visible when bracts and leaves were transversally sectioned and dyed with toluidine blue O (TBO). The presence of crystals was confirmed by a detailed examination of the transverse leaves by using bright-field and cross-polarizing microscopy. Dissecting microscopic examination showed that all the leaves revealed leaves venation pattern that had midvein, lateral veins areoles, and trichomes. Although trichomes have been identified on both sides, a closer look at a cleaned leaf dyed with TBO showed multicellular abundant trichomes on adaxial surface. Stomata complexes were typically found on the abaxial surface of the leaf according to epidermal peels. Present studies also showed that on adaxial side, stomata were lesser in number or were absent and also showed that the morphologies of the pavement cells on the adaxial and abaxial sides of the leaf differed.     

浅谈深圳市市花簕杜鹃在园林中的应用与栽培

[竹勒]杜鹃抗逆性强，适应性强，对土壤条件要求不高，并且花色丰富、花期长，是深圳城市绿色的主要植物之一。     

叶子花红色素的提取及其稳定性研究

以叶子花苞叶为原料提取红色素,经正交试验选择最佳提取条件,并对光、温度、pH值、氧化还原介质、6种金属离子和4种食品添加剂对色素稳定性的影响进行了研究。结果表明,叶子花红色素为水溶性花青素的花色苷,在可见光区的最大吸收波长λmax=541nm。最佳提取条件为:以5%乙醇为提取剂,配料比为1:15,25℃下保温浸提3次,每次1h。该色素在70℃以下稳定性较好,对光的耐受性较差;色素在酸性条件下稳定,耐还原性强,但耐氧化性较差。6种金属离子中,Cu2+、Zn2+、Fe3+对色素有明显的破坏作用,而Mn2+、Mg2+、Al3+对色素稳定性较好,并有不同程度的护色作用。葡萄糖、NaCl、VC、苯甲酸钠对色素无不良影响。     

光叶子花红色素的稳定性研究

本文主要研究了光叶子花紫红花红色素的稳定性。结果表明,此色素溶于水、乙醇溶液,难溶于无水乙醇、乙醚、丙酮;对光、还原剂、糖类较稳定,金属离子对其有一定的影响;在低于60℃、PH<9条件下较稳定。