鄭偉力2006-07-252018-06-282006-07-252018-06-282003http://ntur.lib.ntu.edu.tw//handle/246246/14823本計畫採集南沖繩海槽之七個懸浮物與14 個沈積物標本並分析其所含之脂肪族烴類、肪族醇與固醇，目的為探討懸浮物與沈積物脂質組成之差異Seven total suspended matter (TSM) and 14 sediment samples from the southern Okinawa Trough were analyzed for aliphatic hydrocarbons, alkanols and sterols in order to explore the differences between TSM and sediments. The percentages of the 7 planktonically-derived hydrocarbon (PDHC) in TSM ranged from 23% to 62% with an average of 39%. Compared with the East China Sea, these values were comparatively low, probably attributing to the low productivity in the Okinawa Trough because Kuroshio water is oligotrophic. Phytol (78.6 ± 62.1 µg/g) and C22 n-alkanol (81.2±16.3 µg/g) were the two most significant constituents in the TSM. The concentrations of C20:1 and C22:1 n-alkenols in TSM were 2.54 ± 2.23 µg/g and 7.59 ± 5.43 µg/g, respectively. The sterol composition 2 of TSM was dominated by 24-methylcholesta-5,22E-dien-3β-ol (brassicasterol/diatomsterol), cholest-5-en-3β-ol (cholesterol), cholesta-5,22E-dien-3β-ol (22-dehydrocholesterol), and 27-nor-24-methylcholesta-5,22E-dien- 3β-ol. For sediment samples, lower molecular weight n-alkanes (<C25) showed relatively low and very similar concentrations, and higher molecular weight n-alkanes (≥C25) exhibited comparatively high concentrations and marked odd-even preference with a mean carbon preference index (CPI) value of 2.82. Relatively low concentrations were found for n-alkenols: C20:1 (average 6.78±4.59 ng/g) and C22:1 (average 9.97±4.33 ng/g), reflecting preferential degradation of this labile compound. Sedimentary sterols showed the same pattern as those in TSM.application/pdf39429 bytesapplication/pdfzh-TW國立臺灣大學海洋研究所脂質懸浮物沖繩海槽lipidsuspended matterOkinawa Troughreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/14823/1/912611M002008.pdf