对英语专业八级口语口译考试评分的探讨

本文通过对英语专业八级口语口译考试的评分标准的考察，指出八级口语口译考试评分中两个突出的特点，即突出口语考试和口译考试评分“信息单元化”，从而影响口译质量评估的有效性。适当改变评分比例和口译评分标准的改进将有助于改善测评效果。     

7—氯—8—甲基喹啉氯化过程研究

本文用ＨＭＯ法对７－氯－８－甲基喹啉的电子密度、键级和自由价进行了计算，认为７－氯－８－甲基喹啉可以进行Ｃ３位亲电氯代反应。通过实验研究氯化过程，测定出六种氯化物，结果表明，在合适条件下，Ｃ３位的氯化伴随着甲基侧链的自由基氯代反应同时发生。     

Pharmacodynamic profile of CQP 201-403, a novel 8α-amino-ergoline

Summary The profile of action in animals of CQP 201-403, a novel 8-amino-ergoline, is in most aspects that of a very potent dopaminomimetic, both as a prolactin secretion inhibitor, and at the levels of the CNS and the cardiovascular system. Qualitatively CQP 201-403 differs slightly from bromocriptine and apomorphine in its effects on the CNS (no influence on serotonin metabolism in the rat cortex; induction of masculine mounting behavior in rats) and the cardiovascular system of the dog (reflex tachycardia in response to a blood-pressure fall). In man the new compound proved to be highly active in lowering prolactin serum levels and to be more potent than bromocriptine (Parlodel^®).In memory of Dr Annemarie Closse, who died 14 June 1987.     

Metabolism of 3β-hydroxycholest-5-en-26-oic acid in hamsters

Summary Metabolism of 26-hydroxycholesterol to 384871l8h737l3/xxlarge946.gif" alt="beta" align="MIDDLE" BORDER="0">-hydroxychol-5-en-24-oic acid and other C24-bile acids has been expected to occur by way of 384871l8h737l3/xxlarge946.gif" alt="beta" align="MIDDLE" BORDER="0">-hydroxycholest-5-en-26-oic acid in studies in vitro. 384871l8h737l3/xxlarge946.gif" alt="beta" align="MIDDLE" BORDER="0">-Hydroxycholest-5-en-26-oic acid was infused intravenously into bile fistula hamsters and the following C24-bile acids were identified: 384871l8h737l3/xxlarge946.gif" alt="beta" align="MIDDLE" BORDER="0">-hydroxychol-5-en-24-oic acid, lithocholic acid, chenodeoxycholic acid, and a small amount of cholic acid.     

Spontaneous transformation of C60Br24 to C60 in solvents

It was found that C₆₀Br₂₄ transforms to C₆₀ spontaneously in some solvents. The intermediate, C₆₀Br₈, can be separated in some cases. When the bromine trap, phenol, was added,p-bromophenol and other brominated product were obtained and identified. The influences of time, the kind of solvent, etc were investigated. Possible mechanism was suggested. Supported by the National Natural Science Foundation of China Liu Ying: born in 1969, Ph. D     

再生丝心蛋白和羧甲基纤维素复合膜的特性及其在有机相葡萄糖生物传感器中的应用

用再生丝心蛋白和羧甲基纤维素构成的复合膜作为固定葡萄糖氧化酶的基质,并用红外光谱测试了该复合膜的结构,用扫描电子显微镜观察了其形态．用上述复合膜材料固定葡萄糖氧化酶和羧酸二茂铁（或７,７,８,８－四氰代二甲基苯醌,ＴＣＮＱ）制成的葡萄糖生物传感器具有较好的灵敏度与稳定性     

以提高乙肝病毒表面抗原表达量和免疫原性为目的的番茄果实特异表达载体的构建

为了提高乙肝病毒表面抗原基因在番茄果实中的表达量和免疫原性,采用克隆的E8番茄果实特异表达启动子和乙肝病毒表面抗原M蛋白基因构建了植物表达载体pBIES2, 及只含有乙肝病毒表面抗原S蛋白的表达载体pBIES,并将它们分别导入根癌农杆菌LBA4404中.最后对该载体的优越性进行了讨论.     

EPON上行方向物理编码子层的FPGA实现

目前EPON的物理层(其中包含物理编码子层)在上行方向尚无ASIC芯片可以直接使用，该文提出了EPON物理编码子层在上行方向的设计思想，并用FPGA实现，功能仿真的结果验证了该设计逻辑功能的正确性。     

Ba6-3xNd8+2xTi18O54(x=2/3)的聚合物前驱体法合成研究

以EDTA为络合剂，EG为酯化剂，利用聚合物前驱体法合成了Ba6-3xNd8 2xTi18O54陶瓷，研究了不同的EDTA与金属离子摩尔比对粉末结晶特性的影响，利用DTA，TG和XRD等技术分析了Ba6-3xNd8 2xTi18O54前驱体和得到的氧化物粉末，测试了由x(EDTA)/x(M)=1．00的前驱体得到的Ba6-3xNd8 2xTi18O54(x=2／3)陶瓷的微波介电性能。在900℃预烧x(EDTA)/x(M)=1．00的前驱体3h，单相的Ba6-3xNd8 2xTi^18O54(x=2／3)直接形成，没有出现中间相。1000℃预烧，1340℃烧结的Ba6-3xNd8 2xTi18O54(x=2／3)陶瓷具有最佳的微波介电性能：ε=87．1，Qf=8710GHz。     

(−)-Epigallocatechin gallate,a polyphenolic tea antioxidant,inhibits peroxynitritemediated formation of 8-oxodeoxyguanosine and 3-nitrotyrosine

Reaction with peroxynitrite at pH 7.4 and 37°C was found to increase the 8-oxodeoxyguanosine levels in calf thymus DNA 35-38-fold. This oxidation of deoxyguanosine, as well as the peroxynitrite-mediated nitration of tyrosine to 3-nitrotyrosine, was significantly inhibited by ascorbic acid, glutathione and (–)-epigallocatechin gallate, a polyphenolic antioxidant present in tea. For 50% inhibition of the oxidation of deoxyguanosine to 8-oxodeoxyguanosine, 1.1, 7.6 of 0.25 mM ascorbate, glutathione or (–)-epigallocatechin gallate, respectively, was required. For 50% inhibition of tyrosine nitration, the respective concentrations were 1.4, 4.6 or 0.11 mM. Thus, (–)-epigallocatechin gallate is a significantly better inhibitor of both reactions than either ascorbate or glutathione. Reaction of (–)-epigallocatechin gallate with peroxynitrite alone resulted in the formation of a number of products. Ultraviolet spectra of two of these suggest that the tea polyphenol and/or its oxidation products are nitrated by peroxynitrite.