等原子的

Generally speaking, the reaction types involvingα-oxoketene--acetals mainly include the regioselective addition-aromatization with organometallic reagents, conjugate addition-cyclization with nitrogen nucleophilicspecies, nucleophilic reactions ofα-carbon, acting as odorless dithiol equivalentsin thioacetalization, Michael additions and [5+1] annulation, as well as the synthetic applications based on the above reactions.

一般来说，基于α-羰基二硫缩烯酮化学的反应主要为：与金属有机试剂的选择性加成反应，与氮亲核体的共轭加成反应，α-碳原子的亲核性及相关反应，烷硫基作为硫醇的替代试剂的应用，α-羰基二硫缩烯酮在碳环、杂环化合物合成中的应用等。

The study of lattice implication algebras On the basis of previous results of lattice implication algebras, we firstly studied some properties of implication filters, prime implication filters, maximal implication filters and ultrafilters. Then we laid stress on the study of two kinds of relatively general lattice implication algebras, i. e. complete and atomic lattice implication algebra and injective lattice implication algebra.

关于格蕴涵代数的研究本文在已有的格蕴涵代数研究结果基础上，首先研究了格蕴涵代数中蕴涵滤子、素蕴涵滤子、极大蕴涵滤子和超滤等的性质和相互的关系，然后重点较系统地研究了两类覆盖面较广的格蕴涵代数：完备的且原子的格蕴涵代数和内射的格蕴涵代数。

The former is to prepare polymolybdates coordinated' directly by organic ligands using Na2MoO4 and MoO3 precursors; The latter plays emphasis on exploiting a simple and effective routine to synthesize Keggin polytungstates in which the transition metal or Si acts as the heteratom by reaction precursor Na2WO4.We have synthesized a 4,4'-bipyridine bridging dumbbell-like polymolybdates a metatungs...

前者主要是制备有机配体键合的多金属钼酸盐；后者重点是探索出一个简易、有效的合成过渡金属或主族元素硅作杂原子的Keggin多金属钨酸盐的方法，然后通过变换过渡金属或有机配体的种类探讨对产物结构的影响，再对所得化合物的结构和组成通过物理测试手段进行表征，同时研究其在光、电、磁等方面的性质。

It is verified first that Buckingham and Parlett's perturbation theory on the light-induced energy change of a polarizable atom or molecule is consistent with that of the optical-pumping theory.

鉴于已有的理论孤立地研究Warren等人的实验结果，忽视了与ac Stark效应的关联，我们第一次理论证明了：Buckingham与Parlett的关于在光场的作用下原子和分子的能级改变的基本公式，实际上与光抽运过程中能级光移动的理论相一致。

By thermodynamically and dynamically calculating and analysing ,a new growth mechanism of spherical graphite has been proposed ,that is,the spherical graphite does not grow inwardly,but grow outwardly and when spherical graphite grow outwardly carbon atoms come into and fill-up the entocoele of spherical graphite by the diffusing way.

通过对石墨球最终表面的形态进行分析，可以获得气泡的表面并不是石墨球的最终表面，石墨球表面主要由于受到石墨球表面各微晶长大速度不均匀性、铁水中的三大起伏、微量元素与碳原子的竟相吸附、由于浓度梯度和温度梯度所引起铁水的对流等各种因素的综合影响结果使其表面成为凹凸起伏的形状

The equiatomic composition of Fe-Co was chosen for its largest magnetic induction, nearly zero magnetic anisotropy constant and maximum order-disorder temperature (725℃).

合金中选择等原子比的Fe-Co是由于其具有最大的磁感应强度，几乎为零的磁晶各向异性常数和最大的有序-无序的转换温度（725℃）。

The change for substitute group on chlorin ring of chlorophyll-a derivative and the effect on their visible spectra is discussed and summarized according to relation of electron effect and substituted position of different groups with conjugated region.

根据不同取代基的电子效应、取代位置与分子共轭区域的联系，提出二氮杂轮烯和四氮杂轮烯组成的非等原子芳香体系结构，总结了卟吩大环上的化学结构变化对其可见光谱的影响。

Science attempts to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons

科学试图描述和说明分子和原子的特性，以及它们的成分：电子，质子，中子和其它更鲜为人知的粒子如夸克和胶子等。

The regularities of the substitution effects of the electron-pushing group and the electron- withdrawing group on the electronic structures and the related properties of the complexes, e.g. the energies and the compositions of some frontier molecular orbitals, the spectroscopy properties, the atomic net charge populations on main ligands, the coordination-bond lengths and the coordination-bond angles of the complexes, etc. have been investigated.

探讨供电子基团和拉电子基团在主配体上的取代对配合物的电子结构及相关性质，如配合物前沿分子轨道的能量、组成、光谱性质、原子的净电荷布居及配位键长键角等的影响规律。

The preparation mechanism of the product was explored through the formation of primary nuclei, the processing of autocatalytic reaction, the low atomic diffusion rate, low heat fluctuation and the spatial isotropy in reaction solution.

从初核的形成、自催化反应的持续、低温下原子的低扩散率和热涨落以及反应溶液中空间各向同性等角度对低温法形成均匀球状Ni-P纳米金属玻璃的机制进行了探讨。

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