查询词典 chemical

With some examples, the correlat ions between the thermal expansion coefficients of minerals and the types of cr ystal structures, the nature of chemical bonds, the valencies of ions , the interionic distances, the percentage ionic characters, the electronic conf igurations of ions and the chemical compositions are discussed and summarised . The crystal chemistry approach has been used in the calculation of the th ermal expansion coefficients for minerals with simple structures and composition s.

晶体化学方法是研究矿物热膨胀系数的有效方法，但由于矿物的热膨胀系数和晶体化学参数之间的定量关系尚未完全弄清，目前仅仅能对简单结构矿物的热膨胀系数进行计算，结构、成分较复杂的矿物的热膨胀系数计算尚缺乏好的晶体化学模型。

The ionization potential of an element is a measure of its ability to enter into chemical reactions requiring ion formation or donation of electron s and is related to the nature of the chemical bonding in the compounds formed by elements

为元素参与取得离子形式或移出电子的化学反应能力的量度，也与元素形成化合物中的化学键的性质有关。

The ionization potential of an element is a measure of its ability to enter into chemical reactions requiring ion formation or donation of electrons and is related to the nature of the chemical bonding in the compounds formed by elements

为元素参与取得离子形式或移出电子的化学反应能力的量度，也与元素形成化合物中的化学键的性质有关。

The results showed that there's clear negative correlation between the chemical components such as protein, total nitrogen and nicotine etc., and the sensory quality such as quality and concentration of aroma, offensive taste, irritancy, after taste and so on, but these chemical components and the sensory quality such as physiological strength an...

然而 ，烟叶化学成分是相当复杂的，目前在烟叶中已鉴定出的化学成分已超过 30 0 0种，因此，要直接分析烟叶化学成分与烟叶质量的关系是困难的。目前主要采用的方法是数理

This rubber is isobutylene of pvp-k, complete saturated rubber, So has the extremely good physical and chemical properties, for example have good ozone-resisting aging resistance, oxygen ageing resistance, light ageing resistance, climate aging resistance, the chemical stability and excellent air tightness and water resistance, excellent elasticity and energy absorption performance.

该橡胶是异丁烯的均聚物，无双键，为完全饱和橡胶，所以具有极好物理和化学性能，如，良好的耐臭氧老化性、耐氧老化性、耐气候老化性、较好的化学稳定性、优异的气密性和耐水性，极好的弹性和能量吸收性能。

The isopiestic method for multicomponent saturated solutions combines isotonic equilibrations with chemical analyses and determines the solubilities of saturated solutes and water activities simultaneously, which makes sure that the experimental solubilities and water activity refer to the true thermodynamic equilibrium and the most precise chemical analyses.

多元饱和溶液的等压法将等压平衡与化学分析统一起来，同时测定饱和溶质的溶解度和水活度，可以确保溶解度和水活度的实验值是由可靠的热力学平衡和精确化学分析确定的。

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。

The collaboration combine s TCC′s outstanding process technology and ExxonMobil Chemical′s advanced polymer science technology, according to Junya Ishiyama, president of Tonen Chemical Nasu, wholly owned affiliate of TCC.

"我们的合作将东燃化学株式会社杰出的生产工艺技术和埃克森美孚化工的先进聚合物技术相结合，"东燃化学那须(东燃化学株式会社之全资关联公司)董事长Junya Ishiyama说

The collaboration combines TCC′s outstanding process technology and ExxonMobil Chemical′s advanced polymer science technology, according to Junya Ishiyama, president of Tonen Chemical Nasu, wholly owned affiliate of TCC.

"我们的合作将东燃化学株式会社杰出的生产工艺技术和埃克森美孚化工的先进聚合物技术相结合，"东燃化学那须(东燃化学株式会社之全资关联公司)董事长Junya Ishiyama说

The collaboration combines TCC′s outstanding process technology and ExxonMobil Chemical′s advance d polymer science technology, according to Junya Ishiyama, president of Tonen Chemical Nasu, wholly owned affiliate of TCC.

"我们的合作将东燃化学株式会社杰出的生产工艺技术和埃克森美孚化工的先进聚合物技术相结合，"东燃化学那须(东燃化学株式会社之全资关联公司)董事长Junya Ishiyama说

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。