不同元素的原子，以简单的整数比化合成化合物。
Atoms of different elements combine in simple whole number ratios to form compounds.
利用MTT法对合成化合物进行了细胞毒性的筛选。
Cytotoxicity screenings on the synthetic compounds were measured by the MTT assay.
探讨了s烷基化反应的反应条件和所合成化合物的波谱性质。
The conditions of S-alkylation reaction and the spectral properties of the synthesized compounds were researched.
在地球上通常为低温的情况下，大多数元素已结合成化合物。
At the low temperatures prevailing on the earth, most of the elements have combined to form compounds.
近年来，铀酰矿物和合成化合物的晶体化学也得到了较大的重视。
The crystal chemistry of uranyl minerals and synthetic compounds has received considerable attention recently, owing to the importance of these phases in the environment.
发现青霉素以后，又大力搜索可用于治疗其它微生物病原体的其它天然或合成化合物。
The discovery of penicillin was followed by a vigorous search for other natural or synthetic compounds which could be used to treat other microbial pathogens.
现有规定的重金属测试方法落后于现代分析技术，尤其是药物合成化合物。
Existing prescribed methodologies for heavy metals testing, especially in pharmaceutical compounds lags behind modern analytical technology.
用三光气代替光气合成化合物能有效消除光气的危险性，在生产中具有较广泛的应用前景。
The risk of reaction using phosgene could be avoided effectively by substitution of triphosgene for phosgene, and application of triphosgene in production with broad prospect was believed by author.
美国神经心理药理学大学。神经心理药理学领域包括了对天然的或人工合成化合物在脑、思维和人类行为方面作用的评估。
American College of neuropsychopharmacology. The field of neuropsychopharmacology involves the evaluation of the effects of natural and synthetic compounds upon the brain, mind, and human behavior.
立体选择性化合物的制备是当代有机合成化学中非常重要而且具有挑战性的领域之一。
The preparation of stereospecific compounds is an important and challenging area of contemporary synthetic organic chemistry.
而自由基扩环反应是合成中环乃至大环有机化合物的一种有效的新方法，已成为当今有机合成化学的前沿研究领域之一。
Radical ring expansion is a new strategy to synthesize the medium-sized and even large rings, nowadays, it is one of the important research fields of organic chemistry.
现其特殊品合成部门诚寻一位放射合成化学研究人员，以从事碳-14 标志化合物的合成、纯化及分析工作。
The Specialty Synthesis Group is seeking a Synthetic Radiochemist to be responsible for the carbon-14 radiolabeled chemical synthesis, purification and analysis.
现其特殊品合成部门诚寻一位放射合成化学研究人员，以从事碳-14 标志化合物的合成、纯化及分析工作。
The Specialty Synthesis Group is seeking a Synthetic Radiochemist to be responsible for the carbon-14 radiolabeled chemical synthesis, purification and analysis.
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