植物化学

The chemical mechanism for the expression of flower color is the ratio of different type of pigments in petals; the anatomic and optical mechanism for the expression of flower color are the dimensional distribution of the pigments in petals and their effects on light; and the physiological mechanism are the pH of cell sap of petal, the developmental stage and the endogenous hormones of flower.

花色素的存在及其变化是植物花色表现的化学机制，色素在花瓣中的空间分布及其对光的作用是花色表现的解剖学和光学机制，细胞液pH值、花发育阶段和植物激素是花色表现的植物生理学机制。

The thickening of the collenchyma and the sclemchyma in different degree and different ingredient are the adaptability of mechanical tissue in plant to the functions in different growth stages.

鲜明的特征。3 植物组织细胞壁结构、成分的特化与功能的适应二植物细胞细胞壁的层次及化学成分高等植物组织一般按功能主要分为保护组织。

Object To establish HPLC fingerprint spectrum of plants from Hypericum Linn. to evaluate their chemical constituents and provide the scientific basis for identification.

目的 建立金丝桃属植物的HPLC指纹谱，对该属植物中所含的化学成分进行综合评价并为该属植物鉴定提供依据。

The chemical constituents of Huperzia serrata Trev. are mainly flavonoids, triterpenoids and alkaloids. In order to get further comprehension of lycopodium alkaloids, we studied the low-polar section of the alkaloids extraction of Huperzia serrata and 19 alkaloids were isolated by ways of silica gel, RP-18 and Sephadex LH-20 etc. All of their structures, including five new compounds and two known ones that were firstly found from this genus, were elucidated with the help of Mass, IR, NMR spectra and so on. The five new alkaloids (HS-07, HS-08, HS-09, HS-10 and HS-11) are belonged to lycopodine class. The other two ones that were new to this genus (HS-18 and HS-19) are belonged to miscellaneous group.

蛇足石杉的主要化学成分为黄酮，三萜和生物碱，为进一步了解该植物的生物碱成分，我们研究了蛇足石杉氯仿总碱低极性部位的生物碱成分，运用正相硅胶、反相RP-18、凝胶LH-20等方法分得了19个生物碱，并通过质谱、红外、核磁共振等波谱鉴定了它们的结构，其中5个为新化合物，2个为首次从该属植物中分离得到的化合物，所分得的新化合物：HS-07、HS-08、HS-09、HS-10和HS-11均为lycopodine类石松生物碱，首次从该属植物中分得的化合物为miscellaneous类：HS-18和HS-19。

These compounds have the higher chemical activity, which plays an important role as messager between plants and plants,plants and the environment or insects.

它们大多具有较高的化学活性，在植物之间、植物与环境、植物与昆虫之间的相互联系中担当着传递信息的重要角色。

The journal well informs the research advances of production of vegetables, fruits, edible fungi and ornamentals under temperate, subtropical and tropical conditions. Research areas include biochemistry, micropropagation, soil science, plant breeding, plant physiology, phytopathology and storage and transport etc.

该杂志全面提供了温带、亚热带与热带的蔬菜、水果、食用菌类与观赏植物生产的研究进展，研究领域涵盖生物化学、微生物繁殖、土壤科学、植物饲养、植物生理学、植物病理学以及储藏与运输等等。

This international journal publishes original scientific articles and short communications on all aspects of phytopathology on the population, organism, physiological, biochemical and molecular genetic level.

资源描述：《植物病理学杂志》刊载种群、有机体、生理学、生物化学和分子遗传等方面植物病理学和植物保护的研究论文。

Phytosterols are a group of components naturally occurring in all plants and are structurally similar to cholesterol. Until now, numerous unique phytosterols have been identified, p-sitosterol, campesterol, and stigmasterol account for the largest proportion in most sources, and the saturated phytosterol are called "phytostanol", such as sitostanol and campestanol.

植物甾醇是存在于植物中的一大类化学物质的总称，其结构与胆固醇相似，几乎存在于所有的植物性食物中，最常见的包括β-谷甾醇、菜油甾醇、豆甾醇，其次是植物甾醇的饱和形式，即β-谷甾烷醇和菜油甾烷醇等。

Studies this kind of plant the scientist regards as the vegetable kingdom most complex plant the hemp, because it contains 400 active chemical compositions and the compound.

研究这种植物的科学家将大麻视为植物王國最复杂的植物，因为它包含四百种活跃化学成分与化合物。

Plant volatiles mainly include terpenoid, benzenoid/phenylpropanoid and fatty-acid derivatives, and they play diverse roles in plant-plant and plant-insect communications.

植物挥发性物质在植物之间和植物与昆虫间化学通讯中起著重要作用。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了