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
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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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 (â¼â30.1â°, Ï = 0.70), similar to those of the long chain n-alkanes (â30.2, Ï = 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 (â¼â27.5â°, Ï = 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
Journal: Organic Geochemistry - Volume 36, Issue 4, April 2005, Pages 531-541
نویسندگان
Nalin P. Ratnayake, Noriyuki Suzuki, Masaaki Matsubara,