Chemical constituents of the stems of Canthium simile were studied.Seven compounds were isolated from ethyl acetate extract of the stem,and their structures were elucidated by various spectroscopic methods.They were i...Chemical constituents of the stems of Canthium simile were studied.Seven compounds were isolated from ethyl acetate extract of the stem,and their structures were elucidated by various spectroscopic methods.They were identified as syringic acid(Ⅰ),isovanillic acid(Ⅱ),Caruilignan D(Ⅲ),(3β)-28-Norlup-20(29)-ene-3,17-diol(Ⅳ),3,4-dimethoxy-2,4-hexadienedioic acid(Ⅴ),dibutyl phthalate(Ⅵ) and diisobutyl phthalate(Ⅶ).The seven compounds were isolated from this genus for the first time.展开更多
The essential oil of a liverworts plant from the Dragon-Snow Mountain in Yunnan province was analyzed via GC/MS.Sixty-three components were identified and nine among them were terpenes(that is dihydroactindiolide,2,2...The essential oil of a liverworts plant from the Dragon-Snow Mountain in Yunnan province was analyzed via GC/MS.Sixty-three components were identified and nine among them were terpenes(that is dihydroactindiolide,2,2′,5′-trimethylacrylophenone,pinane,6,10,14-trimethyl-2-pentadecanone,manool,4,4-dimethyl-androsta-5,7-diene,4,8,12,16-tetramethylheptadecan-4-olide,ethyl cholate and friedelin,respectively),six among them were aromatics(that is benzoic acid,2,6-di-tert-butyl-4-methylphenol,ethyl 2-hydroxyl-4-methoxy-6-methyl benzoate,methyl 2-hydroxyl-4-methoxy benzoate,methyl 2,4-dihydroxy-3,6-dimethyl b enzoate and diisobutyl phthalate,respectively),the others were fatty hydrocarbons or fatty acids or fatty acid esters.展开更多
To get solutions with specific transparent region,several general inorganic compounds with stable chemical property were selected and prepared into aqueous solutions separately or solutions as mixtures.By measuring th...To get solutions with specific transparent region,several general inorganic compounds with stable chemical property were selected and prepared into aqueous solutions separately or solutions as mixtures.By measuring the absorption spectrum,5 kinds of solutions were gotten with transparent region and transmittance as follows: ① 0.3mol·L-1 Cr2(SO4)3(≥650nm,99%),② 0.1 mol·L-1 FeCl3 + 0.5 mol·L-1 CuCl2(440-670nm,56%),③ 0.1mol·L-1 Fe2(SO4)3(≥400nm,96%),④0.6mol·L-1 CoCl2 + 0.4mol·L-1 Cu(NO3)2(400±60nm,38%;550-660nm,24%),⑤0.6mol·L-1 CoCl2 + 0.2mol·L-1 Cr(NO3)3(350±30nm,32%,≥620nm,90%).Experiments of photocatalytic degeneration of methylene blue(MB) were done with TiO2 as catalyst and prepared solutions as filters,results indicated that the degradation rate of MB increased with the decrease of transparent wave length which is fit with the law of photocatalytic reaction.展开更多
文摘Chemical constituents of the stems of Canthium simile were studied.Seven compounds were isolated from ethyl acetate extract of the stem,and their structures were elucidated by various spectroscopic methods.They were identified as syringic acid(Ⅰ),isovanillic acid(Ⅱ),Caruilignan D(Ⅲ),(3β)-28-Norlup-20(29)-ene-3,17-diol(Ⅳ),3,4-dimethoxy-2,4-hexadienedioic acid(Ⅴ),dibutyl phthalate(Ⅵ) and diisobutyl phthalate(Ⅶ).The seven compounds were isolated from this genus for the first time.
文摘The essential oil of a liverworts plant from the Dragon-Snow Mountain in Yunnan province was analyzed via GC/MS.Sixty-three components were identified and nine among them were terpenes(that is dihydroactindiolide,2,2′,5′-trimethylacrylophenone,pinane,6,10,14-trimethyl-2-pentadecanone,manool,4,4-dimethyl-androsta-5,7-diene,4,8,12,16-tetramethylheptadecan-4-olide,ethyl cholate and friedelin,respectively),six among them were aromatics(that is benzoic acid,2,6-di-tert-butyl-4-methylphenol,ethyl 2-hydroxyl-4-methoxy-6-methyl benzoate,methyl 2-hydroxyl-4-methoxy benzoate,methyl 2,4-dihydroxy-3,6-dimethyl b enzoate and diisobutyl phthalate,respectively),the others were fatty hydrocarbons or fatty acids or fatty acid esters.
文摘To get solutions with specific transparent region,several general inorganic compounds with stable chemical property were selected and prepared into aqueous solutions separately or solutions as mixtures.By measuring the absorption spectrum,5 kinds of solutions were gotten with transparent region and transmittance as follows: ① 0.3mol·L-1 Cr2(SO4)3(≥650nm,99%),② 0.1 mol·L-1 FeCl3 + 0.5 mol·L-1 CuCl2(440-670nm,56%),③ 0.1mol·L-1 Fe2(SO4)3(≥400nm,96%),④0.6mol·L-1 CoCl2 + 0.4mol·L-1 Cu(NO3)2(400±60nm,38%;550-660nm,24%),⑤0.6mol·L-1 CoCl2 + 0.2mol·L-1 Cr(NO3)3(350±30nm,32%,≥620nm,90%).Experiments of photocatalytic degeneration of methylene blue(MB) were done with TiO2 as catalyst and prepared solutions as filters,results indicated that the degradation rate of MB increased with the decrease of transparent wave length which is fit with the law of photocatalytic reaction.
