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- The author introduce the application and principle of rush steam in aroma chemical fraction, Point out the attention of it. 摘要介绍冲蒸在香料分馏操作中的几种应用及其原理,并指出有关注意事项。
- Objective To study the inhibitory effects of Hypericum erectum Thunb total extraction(HETTE)and its chemical fractions on the growth of tumor cell S180 of mice in vitro,so as to screen the main anti-tumor active fraction. 目的研究小连翘乙醇总提取物(HETTE)及各化学部位对小鼠体外肿瘤细胞S180增殖的抑制作用,筛选小连翘抗肿瘤主要活性部位。
- These early observations have been supplemented with results from chemical fractionation. 这些早期的观察曾为化学馏分的结果所增补。
- OBJECTIVE To evaluate and compare the antiendotoxin activity of five different chemical fractions isolated from Radix Isa-tidis. 目的评价和比较板蓝根5个不同化学部位的抗内毒素作用。
- For the tested acid soils, available Mn was divided into four chemical fractions which were readily soluble Mn> weakly absorbed Mn, specifically absorbed Mn and oxide Mn. 对于供试酸性土壤来说,有效锰分为易溶态锰、弱吸附态锰、专性吸附态锰和氧化锰四种化学形态,其中氧化锰和易溶态锰是其有效锰的主要存在形态(分别占有效锰总量的86.;4%25和7
- The study on new and unique meteorite types are useful for understanding continuous chemical fractionation of early solar nebula and horizonal variation of lunar crust and Martian surface. 新的和独特陨石类型的研究以及月球和火星陨石的研究有利于探索和了解早期太阳星云的连续化学分馏作用及月壳和火星表面的平均化学组成及其横向变化。
- A reactor is a container for chemical reaction. 反应器是进行化学反应的容器。
- The chemical symbol for copper is "Cu". 铜的化学符号是Cu。
- We are doing a chemical experiment. 我们正在做化学实验。
- My major is the subject of chemical engineering. 我的专业是化学工程学。
- Ammonia is a chemical substance. 氨是种化学物质。
- Keywords Hypericum erectum Thunb;drug screening assays;anti-tumor;chemical fraction; 小连翘;药物筛选试验;抗肿瘤;化学部位;
- A chemical derived from petroleum or natural gas. 石油化学制品从石油或天然气中提炼出的化学产品
- Beware how you handle the toxic chemical. 小心处理有毒的化学药品。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
- Some chemical compounds can be resolved by heat. 一些化学化合物可以通过加热分解。
- I am not familiar with chemical terms. 我不熟悉化学术语。
- He devoted his life to chemical research. 他一生从事化学研究。
- He is experimenting with a new chemical. 他正在实验一种新的化学制品。
- Chemical fractionation of the solar nebule 太阳星云化学分馏