Pressurized liquid extraction using green solvents(ethanol and water)was applied to extract photosynthetic pigments from the microalgae Chlamydomonas sp.An experimental design is employed to determine the effect of th...Pressurized liquid extraction using green solvents(ethanol and water)was applied to extract photosynthetic pigments from the microalgae Chlamydomonas sp.An experimental design is employed to determine the effect of the extraction conditions on the extraction yield and the antioxidant capacity of the different extracts determined using 1,1-diphenyl-2-picryl-hydrazyl and TEAC tests.All the extracts show significant antioxidant activity in all assays.Besides,in this work,the carotenoid and chlorophyll composition of the Chlamydomonas extracts was analyzed by HPLC–DAD–APCI–MS/MS for the first time,being the main compounds lutein and pheophythin a′.展开更多
The aim of this study was to rapidly isolate the major effective flavanoids from the extract of safflower(Carthamus tinctorius) using ODS medium pressure liquid chromatography(MPLC) and semi-preparative HPLC, guid...The aim of this study was to rapidly isolate the major effective flavanoids from the extract of safflower(Carthamus tinctorius) using ODS medium pressure liquid chromatography(MPLC) and semi-preparative HPLC, guided by a developed fingerprint. Twelve compounds were isolated and their structures were elucidated as kaempferol 3-O-β-D-rutinoside(1), kaempferol 3-O-β-D-glucoside(2), rutin(3), quercetin 3-O-β-D-glucoside(4), 6-hydroxykaempferol 3,6,7-tri-O-β-D-glucoside(5), 6-hydroxykaempferol 3-O-β-D-glucoside(6), 6-hydroxykaempferol 6,7-di-O-β-D-glucoside(7), 6-hydroxykaempferol 3-O-β-Drutinoside(8), 6-hydroxykaempferol 3,6-di-O-β-D-glucosyl 7-O-β-D-glucuronide(9), isosafflomin C(10), safflomin C(11) and hydroxysafflor yellow A(12) by spectroscopic analysis and comparing with the literature. Our results demonstrated that preparative pressurized liquid chromatography combined with HPLC fingerprint guide is an efficient tool to isolate the target compounds quickly.展开更多
基金EU MIRACLES project(Seventh Framework Programme KBBE-Grant Agreement No.613588,Multi-product Integrated bioRefinery of Algae:from Carbon dioxide and Light Energy to high-value Specialties).
文摘Pressurized liquid extraction using green solvents(ethanol and water)was applied to extract photosynthetic pigments from the microalgae Chlamydomonas sp.An experimental design is employed to determine the effect of the extraction conditions on the extraction yield and the antioxidant capacity of the different extracts determined using 1,1-diphenyl-2-picryl-hydrazyl and TEAC tests.All the extracts show significant antioxidant activity in all assays.Besides,in this work,the carotenoid and chlorophyll composition of the Chlamydomonas extracts was analyzed by HPLC–DAD–APCI–MS/MS for the first time,being the main compounds lutein and pheophythin a′.
基金National Science Fund for Excellent Young Scholars(Grant No.81222051)National Key Technology R&D Program"New Drug Innovation"of China(Grant No.2012ZX09103201-036,2012ZX09301002-002-002 and 2012ZX09304-005)
文摘The aim of this study was to rapidly isolate the major effective flavanoids from the extract of safflower(Carthamus tinctorius) using ODS medium pressure liquid chromatography(MPLC) and semi-preparative HPLC, guided by a developed fingerprint. Twelve compounds were isolated and their structures were elucidated as kaempferol 3-O-β-D-rutinoside(1), kaempferol 3-O-β-D-glucoside(2), rutin(3), quercetin 3-O-β-D-glucoside(4), 6-hydroxykaempferol 3,6,7-tri-O-β-D-glucoside(5), 6-hydroxykaempferol 3-O-β-D-glucoside(6), 6-hydroxykaempferol 6,7-di-O-β-D-glucoside(7), 6-hydroxykaempferol 3-O-β-Drutinoside(8), 6-hydroxykaempferol 3,6-di-O-β-D-glucosyl 7-O-β-D-glucuronide(9), isosafflomin C(10), safflomin C(11) and hydroxysafflor yellow A(12) by spectroscopic analysis and comparing with the literature. Our results demonstrated that preparative pressurized liquid chromatography combined with HPLC fingerprint guide is an efficient tool to isolate the target compounds quickly.