和硫

Though the microorganisms capable to metabolic H〓S and CH〓SH respectively are Thiobacillis, their physiological characteristics are different. The former is acidophile, the optimum range of pH for which is 1～4; whereas, the latter is neutrophile.

代谢H〓S和CH〓SH的微生物菌群从形态上均有杆状硫细菌的特征，但两种菌群的生理特征不同，代谢H〓S的硫杆菌属嗜酸性微生物，代谢CH〓SH的硫杆菌属嗜中性微生物。

Armed with this information and further analyses, Rumble, lead author Bekker, and colleagues propose the following scenario today in Science . Early in Earth's history, volcanic eruptions spewed massive amounts of sulfur dioxide into the atmosphere, where UV sunlight broke down the gas and created the odd sulfur isotope ratios. The sulfur descended with the rain and accumulated into sedimentary beds on the sea floor. Once there, superheated water from geothermal vents at various locations on the sea floor cooked the sulfur into sulfide. Finally, nickel-bearing magma welled up from Earth's mantle, combining with the sulfide to form nickel sulfide and encasing the compound inside volcanic rock called komatiite.

凭借这份资料和进一步的分析，朗布尔、研究论文的第一作者贝克及同事们今天在《科学》杂志上提出了如下的推测：在地球早期的历史上，火山爆发将大量的二氧化硫气体喷射到空中，太阳的紫外线将其分解，产生了奇特的硫同位素比值，这种硫随雨降下，积存于海底沉积层中；一旦到达海底，海底各处的地热出口所产生的温度过高的水把硫加热成硫化物；最终含有镍的岩浆从地幔中涌出，跟硫化物结合形成硫化镍，并将硫化镍包裹在一种叫做"科马提岩"的火山岩中。

Commercial results indicate that FH-UDS deep hydrodesulfurization catalyst has well HDS/HDN activities and stability and can satisfy demands for producing low sulfur dieslel under high caustical conditions.

工业应用结果表明：FH-UDS柴油深度加氢脱硫催化剂具有良好的加氢脱硫、脱氮活性和稳定性，能够满足柴油加氢精制装置生产低硫柴油和高负荷运行的要求；对操作条件进行适当调整，可以生产出硫质量分数小于10μg/g超低硫柴油。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章，研究了二碘化镱的制备方法，以及二碘化镱作为一种优良的单电子转移试剂在有机合成中的应用：二硒醚的Se--Se键和二硫醚S-S键的还原断裂，及其在合成烯丙基硒醚，硒代酯和烯丙基硫醚，硫代酯中的应用，实验结果表明二碘化镱也能促进分子间的Barbier反应，而文献认为二碘化镱不能促进分子间的Barbier反应；最后研究了二碘化钐促进的叠氮化合物与腈的交叉还原偶联反应，一步高收率地制备脒的方法。

The thermal decomposition yielded unsaturated compound and dithiobenzoic acid, leading to some loss of living character of the polymerization, such as retarded reaction rate and broadened molecular weight distribution.

我们根据合成双硫酯的经验和实验中的观察发现，双硫酯的热稳定性对RAFT聚合影响很大，在较高的温度下双硫酯会发生一定程度的热分解，生成的双硫酸会对聚合有一定的阻聚和延迟作用。

The topology models of MFIand MOR were built and the method of Configurational-bias Monte Carlosimulation was used for investigating the adsorption and distributions of ethanethiolas adsorbate in MFI and MOR type zeolites. The diffusion of ethanethiol in MFI andMOR type zeolites was studied by molecular dynamics simulation.The results show, the concentration of Zn2+ is the most important factor of theloading quantity of zeolite 13X and alumina, and the temperature secondly. The pHvalue which range from 2 to 3 effects on the loading quantity faintly.

构建了MFI 和 MOR 两种拓扑结构沸石的数学模型，以乙硫醇分子作为被吸附的目标物，采用偏倚蒙特卡罗方法模拟乙硫醇在MFI和MOR沸石上的吸附行为及分子分布密度，并利用分子动力学模拟乙硫醇在这两种拓扑结构的扩散行为，为实现面向硫化物进行吸附剂的微观结构设计作初步探索。

As CAAX-mimetics, 1, 3-dihydro-5-phenyl-2-H-1, 4-benzodiazepin-2-one was modified by linking carboxyl groups with various carbon through N-1 and C-3, 3-(imidazol-4-yl) propion amido group with different substituents was connected at C-7; In the synthesis of bisubstrate analogues, thiocarbamido compounds was alkylated by alkyl iodide and then hydrolyzed to give alkylthiol benzoate compounds.

1，4-苯并二氮杂草-2-酮类化合物的合成过程中分别对其1、3、4和7位进行了基团变化，在1和3位连接不同长度含羧基或酯基的侧链，在7位连接不同取代的咪唑丙酰氨基。在苯甲酸硫醇酯化合物合成过程中，建立了一种硫原子连有不同长度碳链的苯甲酸硫醇酯的合成方法。

In order to obtain better quality of this experiment, huaiqing yam with no sulfur protect color as the breakthrough point, through the huaiqing yam without sulfur protect color and drying, thus huaiqing yam best without sulfur and drying protect color matching, the actual production for huaiqing yam application support.

为了获得更好品质的怀山药，本试验以无硫护色为切入点，通过对怀山药进行无硫护色和热风干燥的研究，从而获得怀山药最佳无硫护色配比和热风干燥规律，为怀山药的实际生产应用提供支撑。

Which are consistent to the source rocks relating to evaporite depositional environment within the lower part of Xingouzui Formation and the upper part of Shashi Formation in the study area.

对江汉盆地西南缘12个原油样品中含硫化合物分布特征的研究表明，原油中二苯并噻吩系列化合物和苯并萘并噻吩系列化合物分别占芳烃总量的4.61%~9.79%和0.27%~1.32%，与烃源岩中含硫化合物的含量一致，反映原油中含硫化合物的含量与沉积环境有关。

The attack causes the cleavage of P-S double bonds, then the decomposition products reacting with the surface of Fe metal lead to the formation of the anti-wear and anti-friction film largely composed of polyphosphates and sulphides.

计算表明二烷基二硫代磷酸锌的活性元素为6位和7位硫原子，其与铁发生摩擦化学反应时，最可能的断键位置是6位和7位硫原子的双键。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。