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A New Model on Origin and Evolution of Biology 被引量:1
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作者 王奕蛟 冯綮一 柴立和 《Agricultural Science & Technology》 CAS 2009年第4期4-7,共4页
Modified classical Boltzmann entropy as generalized entropy, then proposed Maximum Generalized Entropy Principle fusing physics and biology, and established a new model for biological origin and evolutions based on th... Modified classical Boltzmann entropy as generalized entropy, then proposed Maximum Generalized Entropy Principle fusing physics and biology, and established a new model for biological origin and evolutions based on this principle, finally took protein evolution for an example to analyze. The model provided some reference for biological complexity research. 展开更多
关键词 biological origin and evolution COMPLEXITY Generalized entropy
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Microbial degradation and its influence on components of coalbed gases in Enhong syncline, China
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作者 Lan Fengjuan Qin Yong +3 位作者 Li Ming Tang Yonghong Guo Chen Zhang Fei 《International Journal of Mining Science and Technology》 SCIE EI 2013年第2期295-301,共7页
Coalbed gases (CBG) in Enhong syncline are characterized by high concentration of C2+ (C2-5 ), with the highest content of ethane over 30%. However, the concentrations of C2+ are not evenly distributed in the syncline... Coalbed gases (CBG) in Enhong syncline are characterized by high concentration of C2+ (C2-5 ), with the highest content of ethane over 30%. However, the concentrations of C2+ are not evenly distributed in the syncline. Based on the analysis of δ13C1 , δ13C2 , δ13C3 , δ13CO2 , δDCH4 of CBG and their origin diagrams in the normal and abnormal areas, this research shows that gases in both areas are thermogenic gases and the reason for the uneven distribution of C2+ is that the microbial degradation action on gases is stronger in the normal area than in the abnormal area. The secondary biologic gases in the normal area are mainly characterized by that the carbon isotopes become obviously lighter in methane and become heavier in ethane, whereas the molecular and isotopic compositions of CO2 change little. These features indicate that the secondary biologic gases are mainly generated by the microbial degradation of C2+ , not generated by the reduction of CO2 . The degradation process is selective to make the residual ethane being enriched in 13C and the generated methane rich in 12C. 展开更多
关键词 Biologic gases C2+ Microbial degradation Stable isotopes Coalbed gases origin Enhong syncline
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