化学

The chemical method which is fit for tube and bar products has been the basis for forming a series of GB, but it needs subjoining.

其中适用于管棒材的化学方法已形成系列国标，但仍需增补；适用于板带材的化学方法仅限于试验研究之用。

Wuhan,as one of the first experimental areas of the national course reform,sets up,in junior high schools,the comprehensive course—"Science" which syncretizes the content of physics,chemistry, biology and geography etc.

武汉市作为第一批国家课改试验区，在初中设置了综合课程《科学》，融合了物理、化学、生物、地理等学科的内容，而在高中随着课程改革的进行，仍然分科设置物理、化学、生物、地理课程。

Compositions of different tobaccos are not the same .

烟草化学成分的变化极为复杂，烟草类型不同，化学成分存在差异。

This survival time was not significantly altered by bilateral denervation of cervical vagi (the major sensory system for detecting changes in pulmonary conditions), by bilateral denervation of peripheral arterial chemoreceptors (the major sensory system for detecting changes in arterial blood gases and pH), by pretreatment with dimethylthiourea, or by pretreatment with milrinone (a phosphodiesterase Ⅲ inhibitor that may avoid respiratory muscle fatigue).

而截断双侧颈部迷走神经（负责侦测肺内部情况的最主要感觉神经）、摘除双侧的周边化学接受器（负责侦测动脉血液气体及酸碱值的最主要化学接受器）、或投予Milrinone（一种phosphodiesteraseⅢ抑制剂，藉抑制cAMP被分解，以增加细胞内cAMP的量，可以使疲乏的呼吸肌内再增加收缩力）、Dimethylthiourea等药物的动物，都无法延长其存活时间。

The composition of obtained PMN-PT have been analyzed by means of macro-quantity chemical analysis. The analyzed results of the Pb2+ concentration indicated that PbO in the PMN-PT seldom volatilized at 850℃. The PbO volatility loss could be up to 3.9% when sintered at 1200℃.

采用定量化学分析法对PMN-PT中的阳离子进行滴定分析。pb~(2+)的化学分析结果表明：在850℃下合成PMN-PT钙钛矿相时，氧化铅的挥发量极少。

Enzymes chemistry is one of the highlights of biochemistry study.

酶化学是生物化学研究的重点之一。

This text is intended for undergraduate and beginning graduate students in chemistry and biochemistry studying amino acids and peptides.

本文的目的是为本科和研究生开始在化学和生物化学研究氨基酸和多肽。

In the chemistry research field of nucleic acid, it has been very active that the small molecules is used as anticancer drugs, the dye of nucleic acid and construction probe.

在核酸的化学研究领域中，小分子用作癌化学治疗剂、核酸染色剂及结构探针等一直是非常活跃的研究方向。

Activity coefficient Number expressing the ratio of a substance's chemical activity to its molar concentration.

活度系数：化学术语，活度系数指物质的化学活度对其浓度之比。

In general, they are synthesized by using chemistry oxidant to oxidize methyl group of aromatic compound into the aldehyde group.

其生产方法一般采用化学氧化剂氧化甲基化合物的方法，即采用化学氧化剂氧化甲基化合物得到芳香族醛类。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。