一分子的

BACKGROUND ＆ AIM: Betulin is an important triterpene. We investigated the antitumor activity of betulin, extracted from the bark of silver birch.

背景与目的：白桦酯醇是一种重要的三萜类生物活性分子，本文从白桦树皮中提取获得白桦酯醇纯品，然后研究该生物活性分子抑制食管癌细胞的活性。

Cinnamaldehyde, a member of α,β-unsaturated aldehydes, and its semi- hydrogenated products such as cinnamyl alcohol and hydrocinnamaldehyde are important fine chemicals and intermediates especially in perfume industry and medicine manufacture.

肉桂醛是α，β-不饱和醛分子中的一种，肉桂醛分子中C=C键及C=O键加氢生成半加氢产物加氢肉桂醛和肉桂醇更是医药、香料等的重要原料及中间体。

Molecular nanotechnology,based on supramolecular self assembly,is emerging high technology.

基于超分子自组装的分子纳米技术是一种新兴的高新技术。

Everything could be had if the price was right: Scud missiles, Hungarian mortars, AK-47s, grenades, chemical weapons, helicopters, an even two MiG-29 Fulcrums.

这是一次雇佣兵、职业杀手、宗教狂热分子、反动分子和牟取暴利的不法之徒的大会串。

A group of scientists now say pollution is tainting the molecular build-up that causes a flower to smell so sweet.

一组科学家声称污染正在破坏它们的分子构成。这些分子构成是花散发芳香的原因所在。

Molecularly imprinted polymers are a new kind of macromolecular materials with molecular recognition capability. Because MIPs have the advantages of predetermination, specificity and practicability, they have been extensively used in chromatographic separation, antibody mimic, solid-phase extraction, biosensors, catalysing reaction and other relevant fields.

分子印迹聚合物是一种具有分子识别能力的新型高分子材料，由于它具有预定性、专一性和实用性等优点，因此在色谱分离、抗体摸拟、固相萃取、生物传感器及模拟酶催化等诸多领域都有广阔的应用前景。

Gas molecules move freely among one another. The result is gas molecules diffuse from high-pressure area toward low-pressure area. The process is called gas diffusion.

气体分子不停的进行着无定向的运动，其结果是气体分子从分压高处向分压低处发生净转移，这一过程称为气体扩散。

This is a probable way to provide information on molecular orientations in Langmuir monolayers in terms of BAM images.

该算法为从BAM图像获取Langmuir单分子膜的微观分子取向信息提供了一种可能的途径。

The gaseous monoxides nitric oxide and carbon monoxide, generated within the blood vessel wall, have been identified as important cellular messengers involved in the regulation of intracellular cGMP levels, platelet aggregation and smooth muscle relaxation, The mechanism by which carbon monoxide activates soluble guanylyl cyclase is similar to that of nitric oxide, and involves binding and dislocation of its heme-iron to induce a conformational change and activation of the catalytic site of guanylyl cyclase.

一氧化氮是体内最重要的气体信使分子，不仅是维持血管正常舒缩功能的重要介质，而且还有抑制单核细胞及血小板与内皮的粘附、聚集、抑制血管平滑肌细胞的增殖等作用。近年研究表明，内源性一氧化碳是体内另一个重要的气体信使分子，它是由血红素氧合酶氧化分解血红素产生的，具有与一氧化氮相似的生理功能。

The researchers have developed a catalyst that consists of iridium oxide molecules surrounded by orange-red dye molecules.

研究人员已经开发出一种催化剂组成的铱氧化物的分子所包围橙红色染料分子。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。