Ozonization processes of 15 tetracosenoic acid methyl ester(TAE) and 9 octadecenoic acid methyl ester(OAE) obtained from Malania Oleifera Chum oil have been monitored by combined gas chromato graphy mass spectrometry(...Ozonization processes of 15 tetracosenoic acid methyl ester(TAE) and 9 octadecenoic acid methyl ester(OAE) obtained from Malania Oleifera Chum oil have been monitored by combined gas chromato graphy mass spectrometry(GC MS) or gas chromatography(GC). The effect of reaction temperature and solvent( heptane , toluene, n butyl acetate, ethanol, and heptane ethanol) on the ozonization selectivity of TAE and OAE were investigated. The results show that TAE has good selectivity in heptane because of its small dielectric constant. The k TAE / k OAE of the ozonization reaction decreased with the increase of ethanol in heptane ethanol , whereas the ozonization selectivities of TAE and OAE reduced with the increase of the reaction temperature .展开更多
重庆化工职业学院陈波水教授科研团队在《Fuel》期刊发表论文Impact of biodiesel on engine oil quality: Role of methyl oleate andperformance of sulfonate detergent additive[2019(244):454-460],该期刊2017年影响因子为4.908。...重庆化工职业学院陈波水教授科研团队在《Fuel》期刊发表论文Impact of biodiesel on engine oil quality: Role of methyl oleate andperformance of sulfonate detergent additive[2019(244):454-460],该期刊2017年影响因子为4.908。本研究通过对生物柴油的主要化学组分——不饱和脂肪酸甲酯的热氧化、热分解动力学及其与润滑油添加剂和基础油的交互作用等方面的系统研究,从分子水平上阐明了生物柴油诱发发动机润滑油性能衰变的特性、机制与规律.展开更多
The inhibitory effects of methanol extracts from the tissues of three macroalgal species on the growths of three marine red tide microalgae were assessed under laboratory conditions.Extracts of Sargassum thunbergii(Me...The inhibitory effects of methanol extracts from the tissues of three macroalgal species on the growths of three marine red tide microalgae were assessed under laboratory conditions.Extracts of Sargassum thunbergii(Mertens ex Roth) Kuntz tissue had stronger inhibitory effects than those of either Sargassum pallidum(Turner) C.Agardh or Sargassum kjellmanianum Yendo on the growths of Heterosigma akashiwo(Hada) Hada,Skeletonema costatum(Grev.) Grev,and Prorocentrum micans Ehrenberg.Methanol extracts of S.thunbergii were further divided into petroleum ether,ethyl acetate,butanol,and distilled water phases by liquid-liquid fractionation.The petroleum ether and ethyl acetate fractions had strong algicidal effects on the microalgae.Gas chromatography-mass spectrometry analyses of these two phases identified nine fatty acids,most of which were unsaturated fatty acids.In addition,pure compounds of four of the nine unsaturated fatty acids had effective concentrations below 5 mg/L.Therefore,unsaturated fatty acids are a component of the allelochemicals in S.thunbergii tissue.展开更多
文摘Ozonization processes of 15 tetracosenoic acid methyl ester(TAE) and 9 octadecenoic acid methyl ester(OAE) obtained from Malania Oleifera Chum oil have been monitored by combined gas chromato graphy mass spectrometry(GC MS) or gas chromatography(GC). The effect of reaction temperature and solvent( heptane , toluene, n butyl acetate, ethanol, and heptane ethanol) on the ozonization selectivity of TAE and OAE were investigated. The results show that TAE has good selectivity in heptane because of its small dielectric constant. The k TAE / k OAE of the ozonization reaction decreased with the increase of ethanol in heptane ethanol , whereas the ozonization selectivities of TAE and OAE reduced with the increase of the reaction temperature .
文摘重庆化工职业学院陈波水教授科研团队在《Fuel》期刊发表论文Impact of biodiesel on engine oil quality: Role of methyl oleate andperformance of sulfonate detergent additive[2019(244):454-460],该期刊2017年影响因子为4.908。本研究通过对生物柴油的主要化学组分——不饱和脂肪酸甲酯的热氧化、热分解动力学及其与润滑油添加剂和基础油的交互作用等方面的系统研究,从分子水平上阐明了生物柴油诱发发动机润滑油性能衰变的特性、机制与规律.
基金Supported by the National Natural Science Foundation of China(No. 31070458)the National Key Technology R&D Program of China(No. 2010BAC68B00)+3 种基金the Specialized Research Program for Marine Public Welfare Industry from the State Oceanic Administration of China(Nos. 200805066,200905020,201005007)the Natural Science Foundation of Shandong Province(No.2009ZRB01461)the Encouraging Foundation for Outstanding Youth Scientists of China(No.2008BS09011)the Science and Technology Project of Institutions of Higher Education of Shandong(No.J10LC13)
文摘The inhibitory effects of methanol extracts from the tissues of three macroalgal species on the growths of three marine red tide microalgae were assessed under laboratory conditions.Extracts of Sargassum thunbergii(Mertens ex Roth) Kuntz tissue had stronger inhibitory effects than those of either Sargassum pallidum(Turner) C.Agardh or Sargassum kjellmanianum Yendo on the growths of Heterosigma akashiwo(Hada) Hada,Skeletonema costatum(Grev.) Grev,and Prorocentrum micans Ehrenberg.Methanol extracts of S.thunbergii were further divided into petroleum ether,ethyl acetate,butanol,and distilled water phases by liquid-liquid fractionation.The petroleum ether and ethyl acetate fractions had strong algicidal effects on the microalgae.Gas chromatography-mass spectrometry analyses of these two phases identified nine fatty acids,most of which were unsaturated fatty acids.In addition,pure compounds of four of the nine unsaturated fatty acids had effective concentrations below 5 mg/L.Therefore,unsaturated fatty acids are a component of the allelochemicals in S.thunbergii tissue.
