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东海沉积物中脂肪酸分布特征

FATTY ACID DISTRIBUTION IN EAST CHINA SEA SEDIMENTS

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【作者】 姜善春傅家谟林茂福阎佐鹏唐远千

【Author】 Jiang Shanchun Fu Jiamo Lin Maofu Yan Zuopeng (Institute of Geochemistry, Academia Sinica) Tang Yuanqian (The 2nd Institute of Oceanography, National Bureau of Oceanography)

【机构】 中国科学院地球化学研究所国家海洋局杭州第二海洋研究所

【摘要】 <正> 近十多年来,国外已广泛开展了湖泊、江湾、海岸、潮间带、海洋、深海钻探等沉积物中脂肪酸的研究。P. A.克兰韦尔(Cranwell)对湖泊沉积物中脂肪酸分布进行了广泛的研究。E. S.范伍利特(Van-Vleet)研究了江湾与海岸沉积物中脂肪酸的成岩作用,J. K.沃尔克曼(Volkman)研究过潮间沉积物和海藻中脂肪酸的组成。S. C.布拉塞尔(Brassell)对日本海槽深海钻探沉积物中脂肪酸的含量分布进行过研究。A. M.菲利普(Philip)认为可以从海洋沉积物中脂肪酸的分布特征推断其物质来源是水生的海藻还是陆源的高等植物碎屑。

【Abstract】 Monocarboxylic acids and dicarboxylic acids in sea-floor sediments of the Jizhou Island and estuarine sediments at the Yangtze River mouth have been examined by using thin layer chromatography and gas chromatography as well as computerized gas chromatography-mass spectrometry.Free and bound fatty acids distributed in the sea-floor sediments show remarkable even/odd predominances except for sample 8138. Monocarboxylic acids show a unimodal distribution, ranging from n-C14 to n-C32 with the maximum at n-C16 while dicarboxylic acids also show a unimodal distribution, ranging from di-C16 to di-C32 with the maximum at di-C24 or di-C28.Evidence from the distribution of fatty acids in the East China Sea sediments indicates that these monocarboxylic acids are probably, derived from algal debris and ,these dicarboxylic acids are derived from terrigenous higher plant detritus.

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