产物

In order to investigate the mechanism for this reaction, methyl α-bromoacetate or ethyl α-bromoacetate as starting material was added to the solution of phenyl selenoamide in ethanol in 1:1 or 2:1 molar ratio under the neutral condition at room temperature. The results indicated that the same product bis or bis diselenide was formed. Byproduct ethyl benzoate was also separated.

为了研究该反应机理，选择α-溴代乙酸甲酯或α-溴代乙酸乙酯在无催化剂、中性条件下，乙醇溶液中与苯基硒代酰胺室温下反应，投料比为1：1和2：1，结果也都生成了同一类产物二甲氧羰基甲基二硒醚或二乙氧羰基甲基二硒醚，同时还分离得到了相应的副产物苯甲酸乙酯。

Chapter 1: The reactions of methylenecyclopropanes with phenylsulfenyl chloride or phenylselenyl chloride give cyclobutene derivatives along with ring-opened products in good total yields at 0 °C in various solvents. The reactions of methylenecyclopropanes with diphenyl diselenide give the di-phenylselenyl substituted ring-opening products which can be transformed to 2,5-dihydrofuran derivatives under the oxidation with hydrogen peroxide at room temperature.

在第一章中，我们发现亚甲基环丙烷类化合物在0℃时即可很快与苯硫氯或苯硒氯发生反应生成取代环丁烯类化合物和正常的开环产物；而与二苯基二硒的反应则需加热到150℃以上才能进行反应，生成的二苯硒基开环产物在双氧水氧化下可以转化为取代二氢呋喃类化合物。

However, if this reaction was carried out at low temperature, methoxy groups monosubstituted and disubstituted complexes 14a and 13a were isolated as major products, and only a little of carborane cage opened complexes were obtained.

而在低温下反应，得到的是甲氧基单取代的产物14a和双取代的13a，以及少量的开笼产物。

The reaction products between disubstituted phosphinosilane and alkynes were those eliminating SiMe3 after addition rather than those via normal addition.

二取代膦基硅烷和炔类化合物之间的反应不是一般的加成产物，而是加成后SiMe3被H消去的产物。

Since gibberellin is one family of FPP derivatives in the diterpene pathway paralleled with sterol synthesis in the isoprenoid pathway.

对鲨烯合酶的下游产物之一胆固醇的检测显示，转基因烟草的胆固醇含量低于对照，同时以法呢基焦磷酸为前体的二萜支路产物之一的 GA3 含量得到提高。

After separation and purification of the expression products by FPLC,the electrophoric patterns of the various eluted peaks are not different with the culture products on SDS-PAGE.

产物经SDS-PAGE、免疫印迹试验与FPLC分离等分析，均表明该工程菌的共表达产物为AchR α-亚基结构域(相对分子质量为13×103)及其与GroES的络合物(23×103)。

Electrochemical corrosion measurements results indicated that the polyaniline nanofibers synthesized by direct mixed reaction have more excellent corrosion protection than conventional aggregated polyaniline for mild steel. In general, the emeraldine salt shows better anticorrosion performance than emeraldine base in 3.5% NaCl aqueous solution.

电化学测试技术研究表明，直接混合反应法合成的聚苯胺纳米纤维具有比常规聚苯胺更好的防腐蚀性能；在3.5%NaCl溶液中，掺杂态聚苯胺产物的防腐蚀性能优于解掺杂态聚苯胺产物。

Endocellular enzymes of Arthrobacter nicotinovorus D-97 showed a weak hydrolytic activity towards α-1, 4 linkage and glucose, maltose, sucrose and lactose could not be converted into trehalose.

综合采用薄层层析、高效液相电喷雾电离质谱联用(HPLC-ESI／MS)及核磁共振分析手段，在酶反应产物不必被纯化的前提下，最终证明食尼古丁节杆菌D-97对麦芽寡糖的酶反应产物中含有海藻糖。

Product fault ink UN-uniform UN-uniform ink products were:(1) water and ink, ink and wash painting the rubber roll version of wear, spindle bearing wear, cots epiderm aging decline, ink, etc;(2) series water roll of layer debranning, cylindricity wear, a thin layer of shoulderpieces for intergradle monlchamus, a product of long a portion of the Ribbon, resulting in a roller 跞 movement oscillating anisotropism;(3) support by Edition of water, rollers, the cylinder, swayig stand, wear, resulting in version tiaodong Cot by cause pressure by version is unstable, produce ink imbalance, ink, ink plate, staves, relying on the old version (students'overloaded) version of COTS and pressure;(4) the water roll chemiluminscent set of aging or poor quality water decline caused by transmission;(5) does not have a regular check of the drum-and-ink roller and version by version-and-ink roller and pressures;(6) if the drum gear wear, and gear spacing is the same as the regular ink "" gear.

二、产物墨色不平均障碍产物墨色不平均的来因有：（1）传水、传墨、匀墨和靠版水墨各橡胶辊的圆柱度磨损超不差，拆轴承的轴脚磨损，胶辊不内脏嫩化，传墨本领回升等；（2）串水辊度层脱皮，圆柱度磨损超不差，暗地有薄积墨层，两脚长出局部有积墨带，变不败滚子跞不静串墨不不平衡；（3）撑持靠版水、墨辊的锁脚，摆不静支架，磨损惨重，变不败胶辊靠版时跳不静致使靠版不抬辛不安定，爆发水墨不不平衡，呈现墨色不不平衡、干版、水墨杠、嫩版等本体；（4）水辊绒套嫩化或质度不差变不败传水本领回升；（5）操纵按期校核各水墨辊及版滚筒与靠版水墨辊的不抬辛；（6）若滚筒传不静齿轮磨损超不差，呈现与齿轮间距不异的有次序的&齿轮墨杠&。不一、套印障碍 1。

Applying with the Femlab software, the deformation of protective erodent products film in three different ways were analyzed, including different flows in reducer, different structures of reducer and different specifications of reducer.

建立流固耦合数理模型，推导出在任意拉格朗日-欧拉(Arbitrary Lagrange-Euler， ALE)描述下的黏性流体N-S方程和腐蚀产物保护膜固体区域的控制方程，分析管壁边界层多相流介质流动与腐蚀产物保护膜破损之间的耦合作用。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。