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The calculational results are in good agreement with the X-ray data and show that different substitute group results in different charge distribution, the exocyclic sulfur atom has the biggest negative charge value and this site is the most likely site of protonation and methylation as well as the potential coordination site with metallic ions.

计算结果与X-射线衍射数据相符合，并显示虽然不同的取代基导致了不同的电荷分布，但四唑环外的硫原子总是具有最大的负电荷分布，从而使其成为最有可能的质子化、甲基化及与金属离子进行反应的点位。

These results indicate that metal ions,as Cd 2+ and Al 3+,could injure DNA in Vicia faba in vivo.

这一结果说明Cd2+、Al3+对蚕豆的遗传物质DNA有损伤作用。

The influence of several main process variables and some metals ions on pulp bleaching with formamidine sulphinic acid was investigated and discussed.

研究和讨论了一些主要过程参数的影响和某些金属离子对甲脒亚磺酸在纸浆漂白中的影响，同时对FAS漂白过程中添加螯合剂的作用做了深入研究，结果表明螯合剂的加入能改善FAS的漂白能力

Thus, a systematic study of the chromium-doped forsterite, both in theory and experiment, is of importance, not only to the explanation of the emission mechanism of the crystal, but also to the revaluation and utilization of the characteristics of Cr ions as well.

因而，从理论和实验上对Cr：Mg〓SiO〓晶体进行系统的研究，不仅对解释该晶体的发光机理，而且对重新认识铬离子的特性乃至发掘其潜力，都有重要的意义。

ABSTRACT One of the new laser crystals drawing much attention in recent years is the synthetic chromium-doped forsterite, for which Cr ions...

人工掺铬镁橄榄石晶体是近年来受到重视的一种激光晶体，它能使铬离子实现新波段的激光运转。

ABSTRACT One of the new laser crystals drawing much attention in recent years is the synthetic chromium-doped forsterite, for which Cr ions can realize the laser operation in a new wavelength range reaching up to 1340 nm.

人工掺铬镁橄榄石晶体是近年来受到重视的一种激光晶体，它能使铬离子实现新波段的激光运转。

All rocks release large fraction of argon between 300 and 700℃ except garnetiferous mica schist. The amount of argon released between 700 and 1100℃ has a positive relation to Ca/K value on the whole. The saturation implantation dose of rocks in this experiment is～10〓 ions/cm〓.

除含石榴石云母片岩氩放气峰在900℃以外，其它岩石都在300-700℃放出大部分氩气，所有岩石在1100℃以下都释放了其中大部分的氩气。700-1100℃放出的氩气量基本与Ca/K呈正相关关系。120keV氩离子注入多种岩石的饱和剂量为～10〓粒子/cm〓。

Since the molecular clip of glycoluril is also an important supramolecular host but few studies have been done in the field of fluorescent chemosensor,we proceeded with some experiments and research in this field as a trial and designed a series of novel fluorescent chemsensors including different three-dimensional cavities by introducing the fluorophores into the receptor.Their recognition and sensing abilities toward various metal ions and neutral guests were studied.

因此，我们(来源：A1dBC论文网www.abclunwen.com)做了一些尝试性的研究，在传统的甘脲主体化合物上引入荧光发色团，设计了一系列新型的、拥有不同立体空腔的荧光分子夹，并研究了它们对各种金属阳离子以及酚类中性客体分子的识别和荧光传感性能。

The sodium ions located in the 12-membered ring main channel (with Q〓〓0.2 MHz) of zeolite omega are fully hydrated and so mobile to average out the 〓H-〓Na dipolar interaction, while those in the gmelinite cage (Q〓=2.3 MHz) are less hydrated and closely bonded to the lattice oxygen.

3〓Na MAS及〓Na二维四极章动实验的研究表明，在NaΩ分子筛中存在两类不同水合状态的钠离子：一类处于12-圆环主孔道中(四极作用常数Qcc＝0.2MHz)，另一类处于菱钾沸石笼里(Qcc＝2.3MHz)。

Hot corrosion behavior of Na2SO_4 coated B-1900 alloy was studied in air at 827 and 750℃.Corrosion kinetics of the coated alloy was gravimetrically measured,and contents of water soluble ions in the reaction products were chemically analyzed.X-ray diffraction and EMP techniques were employed to determine the components and morphology of the corrosion product scale.

用涂 Na_2SO_4盐膜法研究高温合金 B-1900在827℃和750℃于空气中的热腐蚀行为，测定其腐蚀动力学曲线，用 X -射线衍射和电子探针元素面扫描方法分析腐蚀产物的相组成和成份，还对其中的水溶性离子进行化学定量分析。

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