查询词典 chemistry

The demonstration experiment is in chemistry teaching one of most commonly used intuitional means.

演示实验是化学教学中最常用的直观手段之一。

Taking LOI and vertical burning methods as main measures to estimate the flame retarding efficiency of materials, the effects of each ingredient were studied. With the aid of thermal analysis, the mechanism of chemistry reaction, intumescence and charring were discussed.

以氧指数法和水平燃烧法作为考查阻燃性能的主要手段，研究了聚乙烯膨胀阻燃体系各组分对阻燃性能的影响，并结合热分析的方法对聚乙烯膨胀阻燃体系热降解过程的化学反应机理、膨胀机理、成炭机理进行探讨。

The results show that single sample analysis is better to reflect the distributed features of soil geo-chemistry,the economical and practical sampling density is 16-32 points per km2(100ha),and the geo-chemical map-making is better with the help of inverse distance interpolation.

结果表明，单样分析能更真实地反映土壤地球化学的分布特征，经济实用的采样密度为16点/km2～32点/km2(100ha)，地球化学图件编绘以距离倒数插值法成图效果更好。

This Rejuvenator is developed on the basis of physics, electro chemistry, dialysis, iontophoresis and relevant theories.

这是回春的基础上发展物理学、电化学、透析、离子导入及有关理论。

You also need to know a bit of chemistry for the iron ore stuff.

你也需要了解一点点铁矿石有关的化学知识。

It not only pointed the direction in explaining various ordered phenomena in physics and chemistry, but also contributed to understand the nature and function of irreversibility in m.

它不仅为弄清物理学和化学中的各种有序现象的起因指明了方向，更有助于人们对宏观过程不可逆性的本质及其作用的认识

The physical chemistry properties of catalysts were characterized by ICP,XRD and NH_3-TPD,alkylation of p-cresol with isobutylene over β zeolite modified by Mn and Ce was carried out and the catalytic activity of the zeolite was investigated.

用等离子发射光谱、X射线衍射分析和NH3程序升温脱附(NH3-TPD)表征了改性Hβ沸石的物理化学性质，考察了Mn和Ce改性Hβ沸石对对甲酚-异丁烯烷基化反应的催化性能，并探讨了Mn改性Hβ沸石催化下温度、原料摩尔比和空速对烷基化反应的影响。

As a nontechnical outline, we here mention that quantum mechanics and chemistry have a structure which is linear (i.e., only dependent on the first power of the wavefunctions), local (i.e., solely defined for a finite set of isolated points) and potential (i.e., only admitting action-at-a-distance interactions derivable rom a potential energy).

作为一种非技术性的概括，我们在此提到量子力学和化学所具有的结构，是线性的〔即，仅随波函数的一次幕而定〕，局部的〔即，仅由有限副孤立点定义〕和潜能的〔即，仅承认一定距离相互作用可推论罗姆的潜能〕。

The novel chemistry is described for the isomorphous substitution of amorphous or framework silicon atoms in zeolite itself for aluminum atom in the framework of zeolite.

我们发现在适当的反应条件下，骨架铝的脱出与外界硅原子的取代几乎同时进行，避免了分子筛晶体结构破坏，得到富硅骨架八面沸石分子筛。

Isomorphous substitution of heteroatoms, especially transition metals for Si or Al in zeolite frameworks is an important way to modify the zeolite properties for practical applications, which has achieved considerable interest in the field of zeolite chemistry.

近年来，杂原子分子筛的研究受到普遍关注。杂原子引入分子筛不仅可以有效地调变分子筛的结构和表面性质、赋予分子筛新的催化性能，而且可能得到新型的分子筛材料。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐