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HPLC was coupled with both mass spectroscopy and ultraviolet absorption spectroscopy for simultaneous separation and characterization of the products from glow plasma reaction of chloroform.(3) Phosphorus pentachloride has been used to perchlorinate acenaphthene under moderate pressure and temperature in sealed reaction vessels.

在此基础上,以反相C〓柱为固定相,甲醇/乙醇/环己烷为流动相,采用梯度洗脱的方法,对氯仿辉光放电合成产物进行高效液相色谱-紫外光谱-质谱联用分离分析,成功的分离得到包括富勒烯C〓和全氯代碳簇在内的数十种产物,并得到了相应的质谱和光谱数据。

Under the optimized parameters,i.e.,resorcinol to potassium carbonate molar ratio of 1∶0.5,reaction temperature of 155℃-160℃,reaction time of 6 hours-7 hours,and dimethyl acetamide as solvent,the yield of 2,6-dihydroxybenzoic acid was up to 29.38%.

溶剂羧化法Kolbe-Schmitt反应,是在有机溶剂氛围中,由酚的成盐和酚盐的羧化两步完成,一直应用在农药、医药以及化肥的合成过程中。

The effects of water,free fatty acid,and acetic acid in the reaction system on the reaction were systematically studied.

系统研究了反应体系中的水、游离脂肪酸和乙酸对反应的影响。

The primary radiation reaction is marrow depression, and primary lung radiation reaction. There are 8 marrow depression cases in these groups,(degree Ⅰ: 5 cases, degree Ⅱ: 3 cases). Leukocyte and haematoblast decreased in these cases. Primary lung radiation reaction cases is 6(degree Ⅰ: 4 cases, degree II: 2 cases).

早期非小细胞肺癌的外科手术切除可以获得60%~70%的5年生存率,但是,一部分早期非小细胞肺癌患者因呼吸功能和心功能低下、糖尿病、血管系统疾病,一般状况差而不能耐受手术或术后不易康复,还有一些患者拒绝手术。

The reaction between ammonia and carbon disulfide is a parallel one. Solvent affects the reaction mechanism and reaction rate.

不同溶剂条件下产物的定量分析证实了二硫化碳和氨反应中的溶剂效应。

Furthermore, the effects of ligands, metal and reaction time on the reaction were also researched, and the process of new ligand-metal catalysis for Diels-Alder reaction was also analyzed according to Evans" square planar mode and Corey"s tetrahedral manner.

我们对影响配体对映选择性能的各种因素,如配体结构、金属离子、反应时间等进行了研究,而且根据Evans的平面四方形模式与Corey的四面体过渡态理论为新配体—金属配合物催化的该反应提出了可能的反应机理,并对产物的优势构型作了理论分析。

Under above mentioned conditions, the initial reaction rate and enantiomeric ratio of the reaction are 5.88 mmolL^(-1)h^(-1) and 83. After reaction time of 6h, the yield and the product e.e.

在上述条件下,反应初速度和对映体选择比分别为5.88mmolL^(-1)h^(-1)和83,反应6h,产率为47.6%,产物e.e。

And 67. 5% in Xiangnuo 1 and IR50 respectively when they were under chilling for 2days. Chlorophyll fluorescence data showed that the reaction centers with less accumulation of redundant exciting energy and antenna systems in Xiangnuo 1 were less injured under chilling, with higher qP and qNP which were used to dissipate the redundant exciting energy, and protect the reaction centers from chilling injury. Lower qP and higher Ex as well as decreasing qNP in chilling-susceptible cultivars indicated that its reaction centers and antenna systems were damaged severely by chilling, leading to the lower photosynthetic rate.

叶绿素荧光分析的结果表明,低温下湘糯1号PSII反应中心和天线系统受到的伤害轻,反应中心过剩激发能积累少,可藉较高的qP和qNP进行过剩光能的耗散,保护光合机构免受低温伤害,而冷敏感品种qP下降快,Ex增加较多,但qNP却随低温延长而下降,说明它的反应中心和天线系统都受到了严重的低温伤害,导致光合能力下降。

A reaction modle was established,in which the surface reaction being the rate determining step and Langmuir–Hinshelwood type mechanism model being the most ideal model for the ethanol dehydration reaction.

动力学研究结果表明,在实验条件范围内,乙醇脱水生成乙烯和乙醚的反应属于平行反应,符合Langmuir-Hinshelwood机理模型,表面反应为速率控制步骤。

The optimum conditions for this reaction were confirmed: the mole ratios of the Lewis base and AlCl〓 with the electron-rich aromatic monomer are 1. 2 and 3. 4, respectively; 1, 2-dichloride ethane is the most suitable solvent in this reaction; The solution of the two reactants must be added slowly to a large amount of solvent containing catalyst under pseudo-high dilution conditions; The Lewis base, such as NMP, DMF are applicable in this reaction system.

在此理论的指导下,通过对单体结构的模拟,高选择性地合成了一种新型结构的芳香环状聚硫酯二聚体,对其结构进行了精确的表征,在不同溶剂中得到了该环状二聚体的单晶,单晶X-ray衍射表明该二聚体为环张力极小的大环化合物。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。