植物化学的

In this paper, the structure characters of steroidal alkaloids from Buxaceae were discussed. Using the steroidal alkaloids for the chemotaxonomic characters, the evidences of chemotaxonomy and plant systematics of Buxaceae were studied. The interrelations among three genera, Buxus, Pachysandra, and Sarcococca were discussed.

本文讨论了黄杨科植物甾体生物碱成分的结构特征；以甾体生物碱作为化学分类学的特征物质，初步探讨了黄杨科植物化学分类学的依据和系统位置；同时讨论了黄杨属、板凳果属（Pachysandra，又称富贵草属）和野扇花属3属间的相互关系。

The School of Biology and Biochemistry is primarily dedicated to teaching and research in biology and biochemistry including peptide and protein chemistry, nucleic acid radiation chemistry, parasitology, neuroscience, plant and fungal physiology, marine and coastal studies, ecology and behaviour, experimental phycology, fish genetics, molecular virology, cell genetics and microbiological transformation.

该学院主要致力于生物学与生物化学的教学与研究，其学科领域包？？？肽类和蛋白质化学、核酸放射化学、寄生虫学、神经科学、植物和真菌生理学、海洋和海岸研究、生态？？？和？？？？？为学、实验藻类学、细胞遗传学与微生物转化。

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。

He has also discovered that phytochemicals from curcumin, derived from the turmeric plant, and piperine, from the fruit of the black pepper plant, have a role to play in preventing and inhibiting cancer cell growth.

他还发现，植物化学物质从姜黄素，来自植物姜黄，胡椒，从果实的黑胡椒植物，扮演一个角色，在预防和抑制癌细胞生长。

There are a number of reasons why you should consider taking a dietary supplement. For a start, few of us eat an adequate amount of phytochemically-rich fruits and vegetables each day. Phytochemicals have been shown to have a positive impact on reducing the risk of degenerative diseases, but most people consume a very limited selection of good foods on a regular basis.The fact is that variety in your diet is important to guarantee you get enough of the 45 known essential nutrients that maintain the body's health.

人体需要营养补充品的理由有很多，因为只有小部份的人能够从日常饮食中进食充足份量含丰富植物化学素的蔬果，而大部份人会惯常地食用某几类食物，但选择不同种类的食物是很重要的，这样才可确保人体得到45已知的必须营养及多种重要的植物化学素，这些都证实有效减少变性疾病。

Based on relative literatures,this part has included five resesearch aspects as below.1 Fifteen compounds were isolated and purified by extraction,column chromatography,and their structures were determined on the basis of spectral analysis: acteoside(Ⅰ-1),isoacteoside(Ⅰ-2),crenatoside(Ⅰ-3),cistanoside F(Ⅰ-4),sinapoyl-4-O-β-D-glucoside(Ⅰ-5),adenosine(Ⅰ-6),β-siterol(Ⅰ-7),oleanic acid(Ⅰ-8), succinic acid(Ⅰ-9),caffeic acid(Ⅰ-10),protocatechuic aldehyde(Ⅰ-11),p-hydro xybenzyl alcohol(Ⅰ-12),β-daucosterol(Ⅰ-13),D-galacitol(Ⅰ-14),D-mannitol(Ⅰ-15).Ⅰ-4～15 were obtained from this plant for the first time,andⅠ-6,7,9,and 13 were isolated from Orobanche genus for the first time.2 The scavenging test of DPPH showed that most compounds have comparative antioxidant activity as L-ascorbic acid and part of them show better activity such as the O.coerulescens extract and phenylethanoid glycosides.Acteoside showed potent free radical scavenging effects with a median inhibition concentration of 25.6μg/ml.3 The anti-HBV activities of acteoside,isoacteoside and crenatoside were measured,and all of them showed suppressive activity on the expression of HBsAg and HBeAg in the HepG2.2.15 cell line.

本论文在文献调研基础上对紫花列当化学成分及生物活性进行了研究，并从免疫抗病毒角度探讨紫花列当中特征性成分类叶升麻苷的肝保护作用及其机制。1采用大孔树脂、硅胶和Sephadex LH-20等色谱技术对紫花列当进行系统的植物化学研究，从中分离得到19个化合物，利用UV和NMR等波谱手段及理化性质鉴定了其中的15个化合物，分别为类叶升麻苷(Ⅰ-1)、异类叶升麻苷(Ⅰ-2)、crenatoside(Ⅰ-3)、cistanoside F(Ⅰ-4)、sinapoyl-4-O-β-D-glucoside(Ⅰ-5)、腺苷(Ⅰ-6)、β-谷甾醇(Ⅰ-7)、齐墩果酸(Ⅰ-8)、琥珀酸(Ⅰ-9)、咖啡酸(Ⅰ-10)、原儿茶醛(Ⅰ-11)、对羟甲基苯甲酸(Ⅰ-12)、β-胡萝卜苷(Ⅰ-13)、D-半乳糖醇(Ⅰ-14)和甘露醇(Ⅰ-15除化合物Ⅰ-1、Ⅰ-2和Ⅰ-3外，其余化合物均为首次从该植物中分离得到。2)通过大孔树脂富集该药材有效部位苯乙醇总苷，并采用HPLC测得其所含特征性成分类叶升麻苷的含量可达80%以上。3DPPH自由基清除试验显示紫花列当提取物及其所含的苯乙醇苷类化合物均具有较好的抗氧化能力，其清除DPPH自由基能力接近于抗坏血酸。4采用卡介苗整体致敏、脂多糖离体攻击构建大鼠原代肝细胞免疫性损伤模型，在体外观察类叶升麻苷的保肝作用。

Based on the development of natural biopharmaceuticals and nutriceuticals, the advances in research and development of the resource plant Phyllanthus emblica L., widely distributed in many provinces of South China, are summarized, including its biological, phytogeographical, traditional herbal medicinal, pharmacological and phytochemical studies.

从开发天然功能保健食品的角度，总结了分布于我国南方各省的资源植物余甘子(滇橄榄，Phyllanthus emblica)的生物学、植物地理学、传统草药学、药理学、植物化学等的研究与开发进展，包括作者实验室近年开展的有关余甘子果汁澄清和果酒&去沉淀&的微生物酶法加工技术部分内容，以及引人关注的余甘子果植物多酚提取物及其在美白护肤品新用途的开发，讨论了金沙江干热河谷地域余甘子农业栽培的可行性。

The methods of classical classification, integrating the study on seed morphology and leave epidemics morphology, along with phytomorphology, phytotomy, phytoembryology, palynology, phytocytotaxonomy, phytochemistry and molecular systcmatics, were used to revise and complete the former taxonomic system.

以经典植物分类学方法为基础，结合种子形态学和叶表皮形态学的实验研究，参考植物形态学、植物解剖学、植物胚胎学、孢粉学、植物细胞分类学、植物化学和分子系统学等方面的资料，对前人的五味子属分类系统进行修订和补充。

The study of the biological characteristics of resistant phytopathogenic fungi has great theoretic and practical significance for improving the strategy of chemical pesticide application, postponing the occurrence of the resistance and advancing the chemical prevention and control of diseases caused by phytopathogenic fungi.

研究植物病原真菌抗药菌的生物学特征以及它们的抗药机制对于改进化学农药使用策略，延缓抗药性的产生，推进植物病害的化学防治，具有十分重要的理论和实践意义。

On the basis of our research on Stellera chamaejasme L. and the literatures, the spectral and structural characteristics, the stereochemical researching methods, the distribution in the 3 subtribes of Thymeleaceae and chemotaxonomy of biflavonoids were concluded. We found that biflavonoids played a very important role in the chemotaxonomy of Thymelaeaceous plants.

通过对瑞香狼毒中双黄酮类化合物的研究，结合文献，总结了瑞香科中双黄酮类化合物的结构特点、波谱规律和立体化学研究方法；同时对双黄酮类化合物在瑞香科植物中的分布规律进行了总结，发现双黄酮类化合物在瑞香科的植物化学分类学方面具有重要作用。

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