和硫

Experimental results indicated that performic acid and hydroxyl radical produced in 30% H2O2-HCOOH-Fe(superscript 2+) were combined to oxidize model organic sulfide with desulfurization ratio of over 96%. Catalytic performance of the combination of Fe(superscript 2+) and formic acid was higher than thin of only formic acid.

实验结果表明：30%H2O2-HCOOH-Fe(上标 2+)产生的过氧甲酸和羟基自由基能迅速将模型有机硫化合物氧化，氧化脱硫率可达到96%以上，Fe(上标 2+)和甲酸的催化氧化性能明显优于单纯使用甲酸。

High performance liquid chromatography was used to detect concentration of BP in the air of working sites and level of urinary 1-hydroxypyrene (1-OH-Py) of workers. Contents of acetylcholine in blood filtrate and activities of erythrocyte acetylcholinesterase were determined by Alky hydroxylamine chromatometry and DTNB methods, respectively.

用高效液相色谱法测定各组工作场所空气中BP的浓度，并对工人尿中1-羟基芘(1-OH-Py)的水平进行检测；分别用碱性羟胺比色法和二硫代二硝基苯甲酸法测定全血滤液中乙酰胆碱的含量和红细胞乙酰胆碱酯酶的活性。

Then Doripenem came into the market in the July ,2005. We studied the synthesis of Doripemen.Firstly, we synthesized the chemical 2 from the starting material------o-hydroxylphenylacylamine through Reformastky reaction, alkylation, Diekmann reaction, enolization, esterification and etc. Secondly, we synthesized the chemical 3 from L — hydroxylproline through the protection of carboxyl, amidogen and hydroxyl group, reduction by NaBr, SN_2 substitution and Mitsumobu reaction.

我们以水杨酰胺为起始原料，经Reformatsky反应、烷基化、Diekmann环合、烯醇化、酯化等反应合成双环母核2；再从L-羟基脯氨酸出发，经酯化保护羧基、保护氨基、保护羟基、硼氢化还原酯得醇、Sn2取代和Mitsumobu反应等合成巯基侧链3；最后由化合物3经脱保护、水解得硫醇，和化合物2在二异丙基乙基胺的作用下缩合，最后Pd／C催化脱保护，历经16步反应最终得到产物多尼培南。

The influence of pH levels on protein structure is analyzed using fluorescence anisotropism and a new principle is put forward.

首次以不同修饰的金纳米通道阵列为分离载体，分离了色氨酸／VB2，在半胱氨酸、异硫氰酸胍修饰的金纳米通道阵列内，色氨酸／核黄素的相对选择分离系数度分别为5.7和8.6，绝对分离度分别为111.5和168.0。

In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.

本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2，3-d]嘧啶的方法，此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵，二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。

To restore the ability of chromium can be dissolved in sulfuric acid, hydrochloric acid and High-FE acid and release hydrogen, but also of pure chromium with aqua regia does not work, when there is the presence of halogen ions in the acid can not be long-term stability, high temperature with alkali, hydrogen sulfide, sulfur steam, phosphorus, ammonia, such as carbon monoxide and water vapor reaction of the corresponding compounds, in the high temperature reaction of silicon into the silicide also chromium, chromium alloys with many metals generate a wide range of industrial applications, such as chromium-manganese stainless steel is used extensively for chemical plants.

铬的还原能力强，能溶于硫酸、盐酸和高FE氯酸而放出氢气，但纯铬连王水也不起作用，当有卤素离子存在时，在酸中不能长期稳定，高温时能与强碱、硫化氢、硫蒸汽、磷、氨、一氧化碳和水蒸汽等反应生成对应的化合物，在高温下还能与硅反应成硅化铬，铬能与许多金属生成合金广泛在工业上应用，如铬锰不锈钢大量用于化工设备。

17.5×103 polypeptide had higher methionine content. The synthesis and degradation patterns of 17.5×103 polypeptide were rather different from those of arachin and conarachin I.

17.5 ×103 多肽的甲硫氨酸含量最高，在花生种子发育和萌发过程中它的合成降解规律与花生球蛋白和伴花生球蛋白Ⅰ不同。

For dissociation of c-C2H4S+ in a region 10.6?{11.8 eV, branching ratios and average releases of kinetic energy in channels of formation of c-C2H4S+, CH3CS+ and HCS+ were obtained from well-resolved coincidence mass spectra.

我们由环硫乙烯在光能量范围10.6-11.8 eV的同现质谱谱线的面积和半高宽，得到c-C2H4S+、CH3CS+和HCS+在各个光能量的分枝比和释放的平均动能。

This paper deals mainly with (1)partition of Au and Ag in coexisting phases of lower maturity and high sulphur crude oil and aqueous solution;(2)mobilization and transport abilities of Au and Ag during the interaction of water,oil,and rock;(3)enrichment ability of Au by crude oil during oil generation and primary migration within double source system and under the experimental temperature and pressure.

本文实验内容包括Au、Ag元素在低熟高硫原油及其共存的水溶液中的分配特征，水－油－岩反应体系中Au、Ag活化和迁移的能力，以及在共同源岩和温度，压力共同作用的压力机系统中，石油生成和初次运移过程对Au的富集能力等。

From kerogen and the whole rock respectively 5.6 folds and 1..7 folds (comparing to the condition that no sulphur exists in the oil shale). 3. Sulphur can greatly promote the productivity of liquid hydrocarbon under the condition of middle-low temperature.

在中低温度下单质硫可以大幅度提高生烃母质液态烃产率。300℃时可使干酪根和全样的饱和烃产率分别提高8.1倍和1.5倍，芳烃产率分别提高12.7倍和2.1倍。

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％。