Clausena lansium Wampee VOCs (E)-2-hexenal Antifungal Citrus Penicillium italicum 1. Introduction Citrus is one of the most important fruit crops in the world. During the harvesting, packaging, storage, and transport processes, citrus fruits are prone to mechanical damage and become susceptible to ...
Measurable EAG responses were elicited to all compounds tested, but the most effective antennal stimulants were benzyl acetate, linalool, methyl salicylate and trans-2-hexenal. Mean, pooled EAGs to oxygenated terpenoids, aromatic esters and fatty acid derivatives were larger in magnitude than those ...
2.野杏 种仁含苦杏仁甙约4.84%,还含挥发油,其中主要成分有:下已醛(n-hexanal)占4.81%,反式-2-已烯醛(2-hexenal)占11.57%下已醇(n-hexanol)占14.38%,反式-2-已烯-1-醇(2-hexen-1-ol)占8.28%,芳樟醇占12.61%,a-松油醇占5.69%。牻牛儿醇(geraniol)占2.78%和十四烷酸(teradecanoic acid)占3.6%。
醛、酮分子中的羰基碳以双键与氧结合，其成键情况与乙烯有些相似。碳原子是sp 2 杂化，三个sp 2 杂化轨道处于一个平面内，其中一个杂化轨道与氧形成σ键。碳原子上的p 轨道与氧的p 轨道彼此重叠形成π键，并与三个σ键所构成的平面垂直，因此，羰基的碳氧双键是由一个σ键和一个π键组成的，如图9-1（a...
(2)黄酮化合物:芸香甙、桑甙(moracetin,quercetin-3-triglucoside)、异槲皮甙。 (3)香豆素:伞形花内酯(umbelliferone)、东莨菪素(scopoletin)、东莨菪甙(scopolin)。(4)挥发油:约0.0035%,其中有α-及β-乙烯醛(α-,β-hexenal)、顺式-β,γ-己烯醇、苄醇、异戊醇、芳樟醇、丁胺、丙酮、苯甲醛、丁香酚...