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Abstract: Benzotriazole is a good corrosion preventive compound that can reacts with aldehyde and alcohol.The addition reaction is used to synthesize eight alkoxyalkyl benzotriazoles by benzotriazole,propionaldehyde and methanol,ethanol,propanol,iso-propy
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文摘:利用苯骈三氮唑、丙醛分别和甲醇、乙醇、丙醇-1、丙醇-2、丁醇-1、丁醇-2、2-甲基丙醇-1、2-甲基丁醇-2反应合成了八种烷氧基烷基苯骈三氮唑，通过元素分析、IR、1HNMR对上述化合物的结构进行了测定，并讨论了这类加成反应的历程。 |
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Abstract: Besides the heat, the death-cause in building fire is mostly due to the tox ic ity of the fire smoke.
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文摘:建筑火灾中致人死亡的因素除了热以外，更多的是因为烟气的毒性。 |
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Abstract: Better understanding of the immunological mechanisms implying the insemination and the infertility of some men and women is needed and crucial to the development of an effective immunocontraceptive method.
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文摘:更好地理解隐含在受精和某些男女不孕中的免疫学机制对于开发有效的免疫避孕方法是必须而且是至关重要的。 |
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Abstract: Between 1405 and 1433, Zheng He commanded seven enormous oceangoing expeditions which brought Chinese influence and ideas to the coastal peoples of Asia, India, Arabia and Africa.
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提要：1405~1433年间，郑和率船队七下西洋，将中国的影响和理念带给东南亚、印度、阿拉伯和非洲沿海的人民。 |
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Abstract: Both in the Industrial Society when it had seen a great prosperity of traditional industry, and in the Post-Industrial Society when it managed to go through the difficulties of industrial restructuring, the Ruhr Area is always a highlight all ov
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摘要：无论在工业社会背景下的传统工业繁荣时期，还是在后工业社会背景下的工业结构转型时期，鲁尔区都因其成功的区域发展和独特的区域特性而引起世人的广泛关注。 |
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Abstract: Both the traditional Chinese garden and 18th century English landscape garden attach importance to natural beauty, but their environmental scenes are often very different.
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摘要:中国传统园林和18世纪英国风景园都注重自然美，但环境景观却常呈现明显差异。 |
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Abstract: Breast cancer exhibits familial aggregation, consistent with ariation in genetic susceptibility to the disease.
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摘要：乳腺癌显示家族聚集性，以及对这种疾病易感基因变异的一致性。 |
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Abstract: Breast cancer exhibits familial aggregation, consistent with variation in genetic susceptibility to the disease.
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摘要：乳腺癌显示家族聚集性，以及对这种疾病易感基因变异的一致性。 |
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Abstract: Brief introduction and canalization of the vibration and noise outoftolerance problems arisen during the prototype test for series YAX, and the suggestion for the prevention to them are given in t his paper.
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文摘:本文简要介绍了YAX系列样机试制中遇到的振动、噪声超差问题，进行了原因分析，给出了拟采取的措施。 |
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Abstract: Brief introduction to χ(2) cascading nonlinearities is presented.The enhancement mechanisms for optical Kerr effect and the photorefractive effect as χ(2) cascading process are discussed.Mutual inductance between quadric and cubic nonlinearities
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文摘:介绍了χ(2)串级非线性.讨论了串级光克尔非线性和串级光折变非线性的增强机制，并指出二阶和三阶非线性的相互转化，为光学非线性工程设计提供了可行性. |
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Abstract: Broad investigation has been done to the road conditions in 16 counties and towns in north Guangxi area,in which overall analysis has been done and studied to the bituminous pavement structure and its material.Thus,Typical structures which adapt
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文摘:通过对广西桂北地区16个县、区的县乡公路路况及交通量的调查，其中对沥青路面结构及其材料进行了较为全面的分析研究，从而提出了适合桂北地区县乡公路的典型结构。 |
