气候变化领域集成服务门户(CCPortal): Branched alkanes with quaternary carbon atoms in Chinese soils: Potential environmental implications

CCPortal

DOI	10.1007/s11434-006-1115-3
	Branched alkanes with quaternary carbon atoms in Chinese soils: Potential environmental implications
	Bai Yan; Fang Xiaomin; Wang Yongli; Kenig, Fabien; Chen Xiuling; Wang Youxia
发表日期	2006
ISSN	1001-6538
EISSN	1861-9541
起始页码	1115
结束页码	1122
卷号	51 期号:9
英文摘要	Lipids extracted from 26 modern soils collected from different climate zones in China and Mongolia are analyzed using gas chromatography-mass spectrometry. These extracts contain-pseudohomologous families of 5,5-diethylalkanes (5,5DEAs), 6,6-diethylalkanes, 5-butyl-5-ethylalkanes and 6-butyl-6-ethylalkanes, which are first detected in modern soils. All these pseudohomologous series display exclusively odd or exclusively even carbon numbers, clearly indicating a biosynthetic origin, and their carbon number distributions generally covary. The distributions of 5,5-DEAs exhibit strong regional variations, correlated with the spatial distributions of climate and vegetation. The lower molecular weight 5,5-DEAs, maximizing at C-21 or C-23, dominate in southeast and southwest China samples, while the higher molecular weight 5,5-DEAs with a mode at C-29 dominate in cold, and northwest China and Mongolia. The results demonstrate that the distribution of 5,5-DEAs can serve as a new independent proxy, indicating variations in soil ecosystems and climates, just like the well-known proxy of n-C15-21/n-C22-33 ratios.
关键词	ORGANIC GEOCHEMISTRY ALIPHATIC ALKANES SEDIMENTS MONOMETHYLALKANES MATTER LIPIDS DISTRIBUTIONS DIAGENESIS PYROLYSIS AUSTRALIA
英文关键词	branched alkanes with quaternary carbon atoms; BAQCs; lipids; modern soils; environmental implication
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000238882500015
来源期刊	CHINESE SCIENCE BULLETIN
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257445
推荐引用方式 GB/T 7714	Bai Yan,Fang Xiaomin,Wang Yongli,et al. Branched alkanes with quaternary carbon atoms in Chinese soils: Potential environmental implications[J]. 中国科学院青藏高原研究所,2006,51(9).
APA	Bai Yan,Fang Xiaomin,Wang Yongli,Kenig, Fabien,Chen Xiuling,&Wang Youxia.(2006).Branched alkanes with quaternary carbon atoms in Chinese soils: Potential environmental implications.CHINESE SCIENCE BULLETIN,51(9).
MLA	Bai Yan,et al."Branched alkanes with quaternary carbon atoms in Chinese soils: Potential environmental implications".CHINESE SCIENCE BULLETIN 51.9(2006).