硫

Separate oxysulfide sulfoxide from oil, the sulfur content of oil can be reduced.

氧化后柴油中的硫氧化物，从油品中萃取分离出来，以达到降低油品硫含量的目的。

Sulfur is the indispensable chemical raw material on the world, early in BC Egyptian was used 2000 sulfureous blanch clothings, subsequently sulfur is used to again make take pigment.

硫是世界上不可缺少的化学原料，早在公元前2000年埃及人就用硫磺漂白衣物，随后硫又被用来制取色素。

The effective treatment of low-grade sulfurous ore and the recovery of valuable minerals are of great significance for the sustainable development of mine and for the pollution reduction of low-grade pyrite.

寻找处理低品位硫矿石的有效方法，回收宝贵的有价矿产资源，对矿山的可持续性发展，减少低品位硫铁矿对环境造成的严重污染具有重要的意义。

The world supply of fuels that are low in sulphur is believed to be limited.

人们认为，全世界低硫燃料的供应有限。硫是火药的组分。

The design and material of construction of sulphur furnace are improved by summarizing problems in operation.

总结焚硫炉使用中出现的问题，对焚硫炉结构的设计和选材进行了改进和完善。

The DFT (B3LYP/6-31 + G) method was used to study the relative stabilities and probable proton transfer in isolated and monohydrated 2,4-dithiothymine molecules in gas phase. The effects of water on relative stabilities and the rate of the proton transfer were analysed. The results indicate that only one tautomer for 2,4-dithiothymine can exist in gas phase.

采用密度泛函方法在B3LYP/6-31+G水平上研究了2，4-二硫基胸腺嘧啶孤立分子和水合物的异构体的相对稳定性和可能的质子迁移反应，分析了水分子的参与对 2，4-二硫基胸腺嘧啶异构体的相对稳定性和质子迁移速率的影响。

The reaction mechanism of thione-thiol tautomerism for 2,6-dithiopurine obtained from proton transfer has been investigated by DFT B3LYP method with 6-311 ＋G basis set.

采用密度泛函B3LYP方法，在6-311＋G基组水平上对2，6-二巯基嘌呤质子转移引起的硫醇式与硫酮式互变异构反应进行了计算研究。

The reaction mechanism of thione-thiol tautomerism for 2,6-dithiopurine obtained from proton transfer has been investigated by DFT B3LYP method with 6-311＋G basis set. The reaction enthalpies, activation energies, activation free energies and the rate constants of tautomerism were obtained.

采用密度泛函B3LYP方法，在6-311＋G基组水平上对2，6-二巯基嘌呤质子转移引起的硫醇式与硫酮式互变异构反应进行了计算研究，获得了互变异构过程的反应焓、活化能、活化吉布斯自由能和质子转移反应的速率常数等性质。

The results of the dissertation were concluded as follows:(1) It is essential to deposit a basic additive on the Mo-based catalysts for the synthesis of CH_3SH. The potassium-doped Mo-based catalysts exhibit the highest activity than that of the catalysts doped with the otherⅠA andⅡA group basic promoters. H_2-TPR and LRS characterizations suggest that the addition of a base leads to the transformation of octahedrally coordinated Mo to tetrahedrally coordinated Mo, thus leads to the split of low temperature reduction peaks. The interaction between the basic components and Mo lead to the formation of B-Mo interface phase, which are closely correlated with the formation of CH_3SH.(2) It has been found that Fe, Co, Ni and Te have evident promoting effects for the K-Mo/SiO_2 catalysts.

主要结果归纳如下：(1)在Mo基催化剂中，必须添加碱才具有可观的合成甲硫醇活性，在IA和IIA族元素中，K是最佳的碱促进剂，当K/Mo摩尔比为2，前驱体为K_2CO_3，采用共浸法制备的K-Mo催化剂活性最高。H_2-TPR和LRS表征显示，碱的加入导致表面八面体钼氧物种向四面体转化，催化剂的低温还原峰发生分裂，碱助剂与钼之间存在强相互作用形成了B-Mo"界面相"，该物种与合成甲硫醇密切相关。

Thiamin deficiency can lead to brain lesions and other neurological abnormalities if the deprivation is sudden and to heart damage and death if it is chronic.

突然间缺乏硫胺会导致大脑受损及其他的神经性官能失调，如果长时间缺乏硫胺，则会导致心脏受损乃至死亡。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。