和硫

In this thesis, a series of benzamides and thioureas derivatives have been designed and prepared. By reasonable photoreaction conditions, a series of benzophenone and quinazoline compounds have been synthesized and structurally determined by NMR, MS and X-ray crystallography, respectively.

本文设计并合成了一系列苯甲酰胺和硫脲衍生物，通过选择合理的光反应条件，合成了一系列二苯甲酮和喹唑啉类化合物，应用核磁、质谱以及X-射线衍射技术对这些化合物的结构进行表征。

The understanding of biogeochemical cycle of hydrogen, oxygen, carbon, nitrogen, and sulfur elements in nature ecosystem have increased substantially in the past two decades owing to the improvement of gas isotope ratio mass spectrometer and the wide application of isotopic studies with these elements.

近20年由於「气相同位素比值质谱仪」的改良和氢、氧、碳、氮和硫等稳定同位素的广泛研究，稳定同位素的研究技术已实质增加我们对於这些元素在自然生態系中生地化循环的瞭解。

CdS nanoarods have been synthesized by using Cetyltrimethyl Ammonium Bromide as the soft template under γ-irradiation through the reaction of cadmium sulphide (CdSO4·8/3H2O) and thiacetamide in acidic condition for pH value of 3. The physical and chemical properties and the structure of CdS nanorods were characterized by XRD, UV-Vis, SAED, TEM and PL.

在pH=3的酸性条件下，以硫酸镉和硫代乙酰胺为反应前驱体，采用十六烷基三甲基溴化铵自组装形成的管状胶束为模板，通过γ射线辐照法成功合成了CdS纳米棒，并通过XRD、UV-Vis、SAED、TEM和PL等技术对反应中间产物及最终产物进行了表征。

Due in large part to relativistic effects this element possesses unique properties such as a higher than expected electron affinity and the formation of strong covalent bonds to soft elements like the heavier halogens and sulfur.

在大的部分由于这元素拥有独特特性的相对论性效应象那样一高，期望电子密切关系和对象更沉重的卤和硫一样的柔软的元素的强大的covalent 契约的形成。

Results: Mdroxyprogesterone acetate plus E2 (10-8 M) stimulated both the mRNA levels and activities of sulfatase (at 10-8-10-6 M) compared to E2 only.

用同位素标记的底物和RT-PCR技术分别测定硫酸酯酶和硫转移酶的活性和mRNA表达水平。

Expanded MSCs were induced to differentiate into nerve cells withthree different treatment protocol in the prensent study . On the following day, the medium was replaced with preinduction medium consisting of DMEM, 20% FCS, and 10 ng/ml basic fibroblast growth factor. After 24 h, the preinduction medium was removed, the cells were washed twice with PBS, and neuronal induction medium containing DMEM supplemented with 2% DMSO and200 m bu-tylated hydroxyanisole was added. In later experiments, we used DMEM with 5 mM p - mercaptoethanol or sulfo - glycerine as an alternative neuronal induction medium for the same incubation.

将待诱导分化的MSCs按0.4x10~6／ml接种于事先放置有消毒盖玻片的六孔板内制备细胞爬片，分别采用三种不同的方法诱导第2代至10代的MSCs向神经细胞分化，即方法1先用含bFGF的培养基进行预诱导，之后再用含叔丁基对羟基茴香醚，和二甲亚砜的无血清培养基进行诱导；方法2和方法3用B-巯基乙醇和硫代甘油进行预诱导，然后不同浓度的上述物质进行正式诱导。

The said cellulose solvent may be used in dissolving natural cellulose and regenerated cellulose via mixing with cellulose, freezing and defreezing; or, it is first cooled to -10 deg.c to 0 deg.c and then maintained in -8 deg.c to 0 deg.c to dissolve natural cellulose and regenerated cellulose directly.

这种氢氧化锂和硫脲的混合水溶液可以通过与纤维素混合后冷冻然后解冻的方法溶解天然纤维素和再生纤维素；也可以预先将该混合水溶液冷却至-10℃～0℃，然后维持在-8℃～0℃左右直接溶解天然纤维素和再生纤维素。

In all vegetables investegated, carrot could bioconcentrate more HCHs and DDT than other vegetables, whose BCF were 1.10 and 0.80 respectively. Meanwhile, lettuce, garlic leaves and spinach could absorb more HCB, Dieldrin and Endrin from environment.

胡萝卜对HCH和DDT等有机氯农药的富集能力较强，而莴苣、蒜苗和菠菜对六氯苯、狄氏剂，异狄氏剂和硫丹有较高的生物富集能力。

Locks SSGP 850 is a fully synthetic soluble grinding fluid, which does not contain mineral oil, sulphur, chlorine, phosphate or phenol. Locks SSGP 850 is highly recommended in the precision grinding operation of cast iron, carbon steel, steel alloy, stainless steel, aluminum and its alloys, copper and its alloys.

洛斯 SSGP 850是全合成型水基磨削液，不含礦物油和硫、氯、磷、酚等物質，特別推薦應用於鑄鐵、碳鋼、合金鋼、不銹鋼、鋁和鋁合金，鋼和銅合金及非金屬材料的精密磨削加工。

The intensive discussion, about the competitive reactions in the y-irradiation process of the stock solution, and experimental results indicate the stability constants of the metal chelates with ethylenediamine, the solubility product constants of the metal sulfides, and the standard electrode potentials of the metal ions directly control the formation of metal sulfides.

深入讨论了金属盐和硫粉在γ—射线辐照乙二胺溶液形成的还原气氛中存在的多种竞争反应，以及金属离子和乙二胺的配位常数、金属硫化物的溶度积常数和金属单质的标准电极电势对制备纳米硫化物的影响。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。