To study the chemical constituents of Stenoloma chusana.The compounds were isolated and purified by recrystallization and various chromatographic techniques.The structures were elucidated by chemical evidence and spec...To study the chemical constituents of Stenoloma chusana.The compounds were isolated and purified by recrystallization and various chromatographic techniques.The structures were elucidated by chemical evidence and spectroscopi methods.five compounds were obtained and identified as(1)hexacosanoic acid,(2)3-hydroxy-heptacosanol,(3)phthalic acid bis-(2-ethylhexyl)ester,(4)β-sitosterol,(5)daucosterol.The five compounds were isolated from this genus for the first time.展开更多
The second speciation of eight trace elements（Zn,Cr,Mg,Mn,Cu,Fe,Ni and Ca）in Stenoloma chusana（L.）Ching were studied.The aqueous solution of the traditional Chinese herbal was separated into the dissolved and part...The second speciation of eight trace elements（Zn,Cr,Mg,Mn,Cu,Fe,Ni and Ca）in Stenoloma chusana（L.）Ching were studied.The aqueous solution of the traditional Chinese herbal was separated into the dissolved and particulate forms by means of 0.45μm membrane filter.The dissolved form was determined as free ions and non-free ions,organic and inorganic,stable and labile forms by means of cation exchange resin,CHCl3 and D-411 Chelating resin.The results showed that the content of eight elements in particulate are far more than that in dissolved.The contents of free ions form of Zn,Ca and Mg are more than 75%.Mn hasn’t any free ions form.Cu、Fe and Ni exist on mostly non-free ions form.The content of free ions form of Cr is 54.23%.Eight elements exist on mostly inorganic forms after extraction of CHCl3.After the separation of D-411 Chelating resin,the content of Zn in labile form is 62.82%.The contents of else elements in stable form are higher than those in labile form and Ni hasn’t any labile form.展开更多
Using Ginsenoside Rb3 as a reference,the determination of Gypenosides from Gynostemma pentaphyllurn(Thunb) Makino was performed.According to the elution rate and the purity of the products,the preparation performance ...Using Ginsenoside Rb3 as a reference,the determination of Gypenosides from Gynostemma pentaphyllurn(Thunb) Makino was performed.According to the elution rate and the purity of the products,the preparation performance of total saponins by macroporous resin was investigated,and its parameters were optimized.The results indicated that the Gypenosides was extracted with 60% ethanol by using ultrasound(extracting rate was 5.19 %,Gypenosides purity of Gypenosides was 50.69 %).The ratio of diameter to hight of macroporous resin D101 was 1∶8.The static absorption ration of macroporous resin D101 was 89.3mg·g-1,the disabsorption ration is 93.83 %.The dynamic ration of macroporous resin D101 was 32.2 mg.g-1,the disabsorption ration was 86.79%.The 80 % ethanol as eluent,the content of Gypenosides part eluted from D101 column was 89.61 %.展开更多
文摘To study the chemical constituents of Stenoloma chusana.The compounds were isolated and purified by recrystallization and various chromatographic techniques.The structures were elucidated by chemical evidence and spectroscopi methods.five compounds were obtained and identified as(1)hexacosanoic acid,(2)3-hydroxy-heptacosanol,(3)phthalic acid bis-(2-ethylhexyl)ester,(4)β-sitosterol,(5)daucosterol.The five compounds were isolated from this genus for the first time.
文摘The second speciation of eight trace elements（Zn,Cr,Mg,Mn,Cu,Fe,Ni and Ca）in Stenoloma chusana（L.）Ching were studied.The aqueous solution of the traditional Chinese herbal was separated into the dissolved and particulate forms by means of 0.45μm membrane filter.The dissolved form was determined as free ions and non-free ions,organic and inorganic,stable and labile forms by means of cation exchange resin,CHCl3 and D-411 Chelating resin.The results showed that the content of eight elements in particulate are far more than that in dissolved.The contents of free ions form of Zn,Ca and Mg are more than 75%.Mn hasn’t any free ions form.Cu、Fe and Ni exist on mostly non-free ions form.The content of free ions form of Cr is 54.23%.Eight elements exist on mostly inorganic forms after extraction of CHCl3.After the separation of D-411 Chelating resin,the content of Zn in labile form is 62.82%.The contents of else elements in stable form are higher than those in labile form and Ni hasn’t any labile form.
文摘Using Ginsenoside Rb3 as a reference,the determination of Gypenosides from Gynostemma pentaphyllurn(Thunb) Makino was performed.According to the elution rate and the purity of the products,the preparation performance of total saponins by macroporous resin was investigated,and its parameters were optimized.The results indicated that the Gypenosides was extracted with 60% ethanol by using ultrasound(extracting rate was 5.19 %,Gypenosides purity of Gypenosides was 50.69 %).The ratio of diameter to hight of macroporous resin D101 was 1∶8.The static absorption ration of macroporous resin D101 was 89.3mg·g-1,the disabsorption ration is 93.83 %.The dynamic ration of macroporous resin D101 was 32.2 mg.g-1,the disabsorption ration was 86.79%.The 80 % ethanol as eluent,the content of Gypenosides part eluted from D101 column was 89.61 %.
