反应率

The second synthetic strategy commenced from butane-1,4-diol 50, which underwent monobenzylation, Swern oxidation, enolization followed by acetylation and debenzylation to yield an intermediate 46 in an overall yield of 54% in a 4-step procedure.

第二条路线从1，4-丁二醇50开始，这个化合物经过单苄基化、Swern氧化、烯醇化随后乙酰化和脱苄基化共4步反应得到中间体46，总产率54％。

The experiment confirmed the kind of catalyst and the best technical condition.The result shows,731 strong acidity ion exchange resin is the best catalyze and high selection,it can be used serval times,esterify rate in 80.2%.

考察了催化剂种类、用量、原料配比、反应时间、阻聚剂用量以及催化剂使用次数等因素对酯化率的影响，确定了催化剂种类和最佳工艺条件。

In the fourth chapter, 5-phenyl-1,2,4-triazine(3) was synthesized from(5-phenyl-1,2,4-trizin-3-yl)hydrazine in the presence of sodium ethoxide firstly. Themerit of this process was simplification of operation and good yield (more than 90%),which to our knowledge has not been reported so far in literature.

第四章首先以(5-苯基-1，2，4-三嗪-3-基)肼为原料，在乙醇钠作用下经一步反应，合成了化合物5-苯基-1，2，4-三嗪(3)；该法操作简单，产率高(＞90％)，迄今未见文献报道。

Results: Twenty patients were studied. Fifteen patients were evaluable. There were no complete response. Partial response was achieved in 4 patients.

结果，共有20位病人进入此研究，只有15位可评估治疗反应，无一例完全缓解，有四位达部份缓解，缓解率达27%。

Exairesis isimportant therapeutic tool, but it leads to toxicity of chemo-therapy, shiftand high recurrent after operation for moderate advanced patients.

手术切除是其重要的治疗手段，但中晚期患者术后转移或复发率高，化疗毒性反应大。

The vomiting, extubate by oneself, injuring of esophageal and variceal bleeding rate were 52%, 18%, 20% and 8%, respectively, in routine group.

常规组呕吐反应、自主拔管行为、食管黏膜损伤和静脉曲张破裂出血发生率分别为52%、18%、20%和8%，视野祛泡率更高(P.05)。

The results showed that rice straw growth and fascicular alteration interacted when water was deficient. It not only affected the transportation of nutritious substance from rhizine and leaf to kernel, but also led to the decrease of agronomic characters and yield. 4 ecotypes of rice vascular bund...

结果表明：水分不足对稻秆及秆中维管束的影响是相互的：稻秆的发育情况影响了维管束变化，同时维管束的变化影响了稻秆的发育，最终影响营养物质从根部、叶部向籽粒运输，从而使结粒数、稔实率、千粒重、产量下降。4种生态型水稻维管束系统与一次及高次枝梗数目、结粒数、千粒重等有类似的相关性，而且水分不足时反应出相同的结果，说明土壤水分对维管束系统的分化有很大的影响，水分不足将使维管束面积变小，维管束比增大，从而使产量变小。

This technique has two prominent problems: titanium"s burning loss and high temperature melt treatment (up 1873K). The author puts forward melting protective cover used by plant ash which can insulate air and enhance effect of heat preservation effectively. At the same time, the author chooses alkalinous magnesite for furnace lining which can avoid redox reaction between silicon oxide (SiO2) and titanium, improve fireproofness of furnace lining and decrease titanium"s burning loss ratio.

针对制备工艺的两个突出问题：Ti元素的烧损问题和高温熔体处理问题(1873K以上)，提出利用草木灰作为熔炼的覆盖剂，能有效地隔离空气，强化保温效果，同时选用碱性镁砂炉衬，提高了炉衬的耐火度，克服了酸性炉衬中SiO_2与Ti元素的氧化还原反应，降低了Ti元素的烧损率。

The volume ratio of furaldehyde to acetic anhydride is 1∶2; the mole ratio of furaldehyde with anhydrous potassium carbonate is 1.00∶0.54. The best phase transfer catalyst is PEG1000, the mass ratio of PEG1000 with furaldehyde is 4.3%, the reaction time is 11 min, the reaction power of microwave is 260 W. The yield ofα-furanacrylicacid is up to 72.3% under these reaction conditions.

研究结果表明：在微波辐射功率为260 W、微波反应时间为11 min、以聚乙二醇1 000(PEG1000)为相转移催化剂，糠醛与乙酐的体积比为1∶2，糠醛与无水碳酸钾的量比为1.00∶0.55时，α-呋喃丙烯酸的产率为72.3%。

Penetrate into the affections of human immune functions by above three kinds of cure pattern, gasless hand-assisted laparoscopic surgery had obvious difference with the others on blood lymphocytes, immune function of erythrocytes RC3bRR, RICR, RFER, RFIR, IL-6、C-reactive protein and so on.

深入研究三种术式对人体免疫功能的影响，非气腹手助腹腔镜手术在外周血T淋巴细胞亚群数量和分类的变化、RC3bRR(红细胞Ⅰ型补体受体花环率)和RICR、RFER和RFIR、血浆IL-6、CRP等急性反应指标含量分析均有明显差异。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。