Identification of a novel alkenone in Black Sea sediments

被引：69

作者：

Xu, L

Reddy, CM

Farrington, JW

Frysinger, GS

Gaines, RB

Johnson, CG

Nelson, RK

Eglinton, TI ^{[1
]}

机构：

[1] Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA

[2] Xiamen Univ, Environm Sci Res Ctr, Xiamen 361005, Peoples R China

[3] US Coast Guard Acad, Dept Sci, New London, CT 06320 USA

来源：

ORGANIC GEOCHEMISTRY | 2001年 / 32卷 / 05期

基金：

美国国家科学基金会;

关键词：

alkenone; structure characterization; sediment; Black Sea; Holocene; haptophytes;

D O I：

10.1016/S0146-6380(01)00019-5

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We report the identification of a novel long-chain ketone in Holocene Black Sea sediments. Based on chemical properties, and chromatographic and mass spectrometric characteristics, this compound has been identified as a diunsaturated C-36 ethyl ketone. Further analyses indicated the position and configuration of the double bonds, and the novel alkenone was determined to be hexatriaconta-(16E,21E)-dien-3-one. While this compound is present in only trace quantities in Unit I sediments, it is the most abundant alkenone in portions of Unit II. Its presence thus apparently pre-dates the invasion of Emiliania huxleyi in the Black Sea. The down-core profiles and isotopic compositions suggest that the precursor for the C-36:2 alkenone may be distinct from that of the C37-39 alkenones, however the biological origin of this novel compound is presently unknown. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：633 / 645

页数：13

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