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Isotope Discriminations Upon Biosynthesis in Natural Systems: General Causes and Individual Factors of the Different Bioelements

 

作者: H.L. Schmidt,  

 

期刊: Isotopes in Environmental and Health Studies  （Taylor Available online 1999）
卷期: Volume 35, issue 1-2  

页码: 11-18

 

ISSN:1025-6016

 

年代: 1999

 

DOI:10.1080/10256019908234076

 

出版商: Taylor & Francis Group

 

关键词: Biosynthesis;carbon isotopes;hydrogen isotopes;isotope effects;isotope discriminations;nitrogen isotopes;oxygen isotopes;sulfur isotopes

 

数据来源: Taylor

 

摘要:

The global isotope abundance of natural organic compounds is determined by that of their precursors. A prerequisite for the formation of non-statistical intermolecular and intramolecular isotope distributions is the occurance of thermodynamic and kinetic isotope effects in irreversible and branched metabolic processes. This coincidence permits the interference of external factors like climatological conditions during biosynthesis, thus leading to corresponding modulations of isotope fractionations.

 

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