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Liang Li Chang‐Yun Wang Chang‐Lun Shao Yue‐Wei Guo Guo‐Qiang Li Xue‐Ping Sun Lei Han Hui Huang Hua‐Shi Guan 《Helvetica chimica acta》2009,92(8):1495-1502
Chemical examination of the soft coral Sarcophyton infundibuliforme collected from the South China Sea resulted in the isolation of the three new O‐glycosylglycerol derivatives sarcoglycosides A–C ( 1 – 3 ), together with two known compounds, chimyl alcohol ( 4 ) and hexadecanol ( 5 ). Their structures were elucidated by combined spectral and chemical methods. All the compounds showed moderate toxicity to brine shrimps Artemia salina. 相似文献
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10-(Perfluorohexyl)-decanol is a partially fluorinated analog of hexadecanol, an important detergent alcohol. With a melting point of T=48.82 °C and a melting enthalpy of ΔH=53.96 J/g, the intermolecular interactions of the fluorinated alcohol are weaker compared to hexadecanol (T=52.67 °C, ΔH=244.41 J/g). The behavior of this fluorinated alcohol at the air-water interface was studied on five different subphases, namely, water, NaCl (150 mM), CaCl2 (2 mM), HCl (pH=2.0), and urea (0.5 M). Similar to other partially fluorinated amphiphiles, the compression isotherms of the fluorinated alcohol on all subphases are more expanded compared to the hydrocarbon alcohol with a limiting area of 32-36 Å2 per molecule and a temperature-dependent phase transition at 5.6-8.2 mN/m (37 °C, compression rate of 10 mm/min). The dependence of the compression isotherms of 10-(perfluorohexyl)-decanol on subphase composition and temperature follows the trends reported for tetra- and hexadecanol. In particular, a shift to smaller molecular areas with increasing temperatures was observed on all five subphases. The shift to smaller molecular areas on urea indicates that in the case of 10-(perfluorohexyl)-decanol the effect is largely due to a loss of material from the air-water interface during compression of the monolayers. However, a squeezing-out of water molecules from the hydration sphere of the polar headgroup may still occur but can not be unambiguously proven. 相似文献
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深黄被孢霉生物转化十六醇合成油脂的研究 总被引:8,自引:0,他引:8
不饱和脂肪酸有重要的生理机能 ,寻找富含不饱和脂肪酸的新油源 ,以弥补动植物油源的不足已成为当前的研究热点 .高碳醇转化为高碳酸已有报道[1],但将其转化为不饱和脂肪酸的研究还少见报道 .利用产脂微生物合成不饱和脂肪酸是开发新油源的良好途径[2 ,3].本文用深黄被孢霉生物转化十六醇合成油脂 ,并分析了油脂中脂肪酸的组成 ,对转化条件也进行了初步研究 .1 实验部分将深黄被孢霉 (Mortierellaisabellina)于 2 8℃在种子培养液中活化 2 4h ,然后接种于十六醇转化培养基上 ,于 2 8℃摇瓶发酵 96h(摇瓶转速 1 50r… 相似文献
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