| 产融型企业集团规模经济效应度量模型的构建及其实证研究 |
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| 引用本文： | 王帅.产融型企业集团规模经济效应度量模型的构建及其实证研究[J].湖南农业大学学报(自然科学版),2013,40(6):92-96. |
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| 作者姓名： | 王帅 |
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| 作者单位： | ( 湖南大学 生物学院,湖南 长沙410082) |
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| 摘 要： | 针对倾向错误的PCR技术中不同目的、不同长度基因的诱变种类一直缺乏准确参考的问题，以酵母spt15基因为研究对象，在标准的PCR反应体系中加入不同Mn2+摩尔浓度（0.125，0.250 和0.500 mmol·L-1）进行倾向错误的PCR，扩增spt15不同长度（分别约为200, 500和700 bp）的DNA片段，研究其突变频率，突变碱基数目及突变类型，以分析不同种类的突变所需的最佳条件.研究结果表明：长片段DNA的PCR突变率对Mn2+摩尔浓度更敏感；模板的长度对DNA PCR突变碱基个数也有较为明显的影响，低Mn2+摩尔浓度有利于单突变；Mn2+驱动的突变有明显的倾向性，其中A→G和T→C的突变居多.
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| 关 键 词： | 突变 倾向错误PCR 锰离子 DNA片段 |
The Scale Economies Evaluation Models of Companies with Combination of Industry and Financing |
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| WANG Shuai.The Scale Economies Evaluation Models of Companies with Combination of Industry and Financing[J].Journal of Hunan Agricultural University,2013,40(6):92-96. |
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| Authors: | WANG Shuai |
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| Institution: | (College of Biology, Hunan Univ, Changsha,Hunan410082,China) |
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| Abstract: | The quick development of the companies with combination of industry and financing has drawn wide attention from the academician and the practitioners. On the basis of analyzing the form mechanism and external characteristics of the scale economies, the evaluation model of scale economic is designed for financial industrial companies, and an empirical study is conducted by adopting the listed financial industrial companies in Shanghai Stock Exchange and Shenzhen Stock Exchange as the sample. The empirical result shows that the industrial company those holding the shares of the financial institutions promote their scale economiies, and the coefficients of the scale economic based on Generalized Translog Cost Function are above 1 for most sample, thus the operation model of financial-industrial companies has been proved effective in China. |
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| Keywords: | Combination of industry and financing Financial industrial companies Scale economic effects |
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