کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9556305 1379679 2005 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sources of long chain fatty acids in deep sea sediments from the Bering Sea and the North Pacific Ocean
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Sources of long chain fatty acids in deep sea sediments from the Bering Sea and the North Pacific Ocean
چکیده انگلیسی
The distributions and compound specific carbon isotope ratios of long chain n-fatty acids and long chain n-alkanes in two sedimentary cores collected from the North Pacific Ocean and the Bering Sea have been examined. Long chain fatty acids were further fractionated into three sub-fractions (esterified, free and polar) to investigate their sources. The δ13C values of these fractions clarified the sources of different fatty acids. The esterified fraction had lighter δ13C values (∼−30.1‰, σ = 0.70), similar to those of the long chain n-alkanes (−30.2, σ = 1.08), consistent with a mainly terrestrial plant origin. In contrast, the long chain fatty acids (except >C28) from the polar and free fractions had heavier isotopic values (∼−27.5‰, σ = 1.06), suggesting a mixed origin from terrestrial and marine organisms. The esterified fatty acids from the North Pacific Ocean and the Bering Sea can be used as terrestrial biomarkers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Organic Geochemistry - Volume 36, Issue 4, April 2005, Pages 531-541
نویسندگان
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