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| Biphenyl and alkylbiphenyls |
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| News Source：http://www.jinchemical.com/
; SendDate：2007-2-1 15:06:25 |
| In the present study, unsaturated lipid precursors have been isolated from six different cultured microalgae and one field sample, a macroalgae (Ecklonia radiata), in order to identify those that give rise to the formation of biphenyl following pyrolysis of lipid extracts. We have established that the biphenyl and alkylbiphenyl GC-MS distributions in different algal extracts exhibit a carbon number distribution consistent with an origin from unsaturated fatty acids, alkenones, unsaturated diols and polyenes. As an extension of this study, d13C values for biphenyl present in some immature sediments have been determined and found to be predominantly derived from an algal source in these sediments, having a d13C composition consistent with pristane, phytane and n-C15 and n-C17 alkanes which have been attributed to an origin mainly phytoplanktonic. |
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