查询词典 constituents

Objective To investigate the chemical constituents from the seeds of Mirabilis jalapa. Methods Various chromatographic techniques were used to separate the chemical constituents.

目的 研究紫茉莉子的化学成分方法利用各种色谱技术进行分离和纯化，通过理化方法及NMR、IR和MS 等方法解析其化学结构。

This thesis deals with the investigation on the chemical constituents of Dioscorea Opposite Thunb and studys the interactions between 5,7-dihydroxy-4′-methoxy flavanone,-epicatechin and bovine serum albumin using fluorescence, electrochemical method ,UV absorption and NMR spectroscopy. The main contents are as follows: Chapter 1: Study of the chemical constituents in Dioscorea opposita Thunb 1. Two methods were used to methylate the fatty acid in Dioscorea opposita Thunb.

本文在前人的工作基础上对我省道地药材-怀山药饮片中的化学成分进行了系统的研究；同时利用核磁共振方法、电化学分析法、荧光光谱法、紫外光谱法分别研究了两种天然酚性化合物5，7-二羟基-4′-甲氧基二氢黄酮，(--表儿茶素与牛血清白蛋白之间的相互作用，主要内容如下：一。

At first, by studying on the mineral constituents, texture and structure, Scleroscope hardness and Vickers hardness etc. of the stone, a fast classifying way of stone machinability was proposed. Based on the Scleroscope hardness, mineral constituents and texture of the stone, it was successful applied in classifying the main Chinese natural stone.

首先，通过对石材的矿物组成、组织结构、肖氏硬度和显微硬度等的分析和研究，提出了以岩石肖氏硬度为主辅以矿物成份和组织结构来快速定性确定岩石可锯性的方法，并成功地对我国主要石材进行了分级。

The improvement is 45% for the phase-lag of S2 after assimilating the altimetric data of the crossover points, while the correction for the diurnal constituents is not so good as for semidiurnal constituents.

利用基于最优插值法的混合法将交叉点的调和常数同化到动力模式中，同化后S_2分潮的迟角精度改进最大，可以改进45％，结果显示高度计资料的分析结果对模式结果的精度影响很大。

Especially after primary distillation, the high volatile components of 1-decanol and α-terpineol, which were of the highest relative conten t, were remarkably declined, even could not be found. The volatile constituents were also lost after rectification. Some constituents with weak volatility were lost because of the excipient, cosolvent and filtration.

特别是经初馏后，原药材中两种相对含量最高的强挥发性成分1-癸醇和α-萜品醇在初馏液中含量明显下降，甚至检测不到；重蒸馏过程也使挥发性成分受到破坏；辅料、助溶剂等的加入和滤过环节使挥发性较弱的成分也在一定程度上受到损失。

The relationship between constituents of one trophic level and constituents of adjacent trophic levels may be described by a food chain.

一个营养级的成员与邻近营养级的成员之间的相互关系可以用食物链来描述。

Concluˉsion Cystine and its sulfur are human ungual characteristic constituents;its content could reflect the rigidity of huˉman ungual and prognosticate to engender morbid possibility.Glutamic acid is one of constituents of human ungual mail;above two amino acids have identification significance and value of clinical diagnosis.

胱氨酸及其硫是其特征性元素，含量高低可反映坚硬程度和发生疾病的可能性；谷氨酸是人指甲的主要成分之，两种氨基酸具有鉴别意义，及临床诊断的价值。

Concluˉsion Cystine and its sulfur are human ungual characteristic constituents;its content could reflect the rigidity of huˉman ungual and prognosticate to engender morbid possibility.Glutamic acid is one of constituents of human

胱氨酸及其硫是其特征性元素，含量高低可反映坚硬程度和发生疾病的可能性；谷氨酸是人指甲的主要成分之一，这两种氨基酸具有鉴别意义，及临床诊断的价值。

Integrity Analysis and Assessment of the Chemical Constituents of Abrus Cantoniensis Materia Based on FTIR KONG Dexin,HUANG Rongshao,WANG Yibing,CHEN Zhicheng,HUANG Shushi1.Lab of Biophysics,Guangxi Academy of Sciences,Nanning 530003,China;2.College of Agronomy,Guangxi University,Nanning 530003,China;3.College of Physcis and Electronic Engineering,Guangxi Nrmal University,Gulin 541004,ChinaAbstract:ObjectiveTo investigate the spectral characteristic and the difference of constituents of different parts of Abrus cantoniensis.

鸡骨草Abrus cantoniensis Hance，又名广州相思子、细叶鸡骨草、小叶鸡骨草，为豆科相思子属植物［1］，原产广西、广东等南部省区，以广西的栽培面积最大，是广西的道地药材，其植株含相思子碱、皂苷、黄酮苷、胆碱、甾醇类、氨基酸、糖类化合物等化学成分［2］，药用部位为去除荚果后的干燥全草，具有清热解毒、疏肝止痛之功效，用于治疗黄疸、胁肋不舒、胃脘胀痛、急慢性肝炎等疾病［3］。

To study the chemical constituents from the leaves of Celastrus gemmatus Loes., chromatographic methods were used to isolate and purify the chemical constituents, their structures were elucidated by the physiochemical characteristics and spectral data.

为研究哥兰叶(Celastrus gemmatus Loes。)中的化学成分，用Diaion HP-20，Toyopearl HW-40，silica gel等柱色谱方法，从其70﹪含水丙酮提取物中分离得到化合物，并根据理化性质和波谱数据鉴定其结构。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。