Two new steroidal glucosides, 26-O-β-D-glucopyranosyl (25S)-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- (1 → 3)-[α-h-rhamnopyranosyl-(1 → 2)]-[β-D-fueopyranoside and (25R) spirost-5-ene-3...Two new steroidal glucosides, 26-O-β-D-glucopyranosyl (25S)-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- (1 → 3)-[α-h-rhamnopyranosyl-(1 → 2)]-[β-D-fueopyranoside and (25R) spirost-5-ene-3β,14α-diol-3-β-O-β-L-rhanmopyranosyl- (1 → 2)-[β-D-xylopyranosyl(1 → 4)]-[-β-D-glucopyranoside, were isolated from the Ophiopogon japonicus (L.f.) Ker-Gaw. Their structures were elucidated by spectroscopic methods.展开更多
The acute toxicity of Sodium dodecylbenzene sulfonate (SDBS) to subcamersed macrophyte Hydrilla verticillata (L.f) Royle was studied. Chlorophyll contents and the activities of 3 antioxidant enzymes: superoxide d...The acute toxicity of Sodium dodecylbenzene sulfonate (SDBS) to subcamersed macrophyte Hydrilla verticillata (L.f) Royle was studied. Chlorophyll contents and the activities of 3 antioxidant enzymes: superoxide dismutase (SOD, EC 1.15.1.1), catalase (CAT, EC 1.11.1.6), peroxidase (POD, EC 1.11.1.7) in the leaves were investigated under different concentrations of SDBS, The chlorophyll contents in leaves of experimental plants decreased gradually, while the electrical conductivity of culture solution increased gradually with the increased dose of SDBS. Under higher concentrations of SDBS (32 mg/L and 128 mg/L) treatment, SOD lost its activities completely after 24 h. The native PAGE analysis indicated the diversity of POD isoenzymes was obvious under different concentrations of SDBS stress.展开更多
基金the National Nature Science Foundation of China (No.30772890)the Program of Progressing Beijing New Medicine Subject Group (XK100270569)the Key Project of Chinese Ministry of Education (No.108132).
文摘Two new steroidal glucosides, 26-O-β-D-glucopyranosyl (25S)-furost-5-ene-1β,3β,22α,26-tetraol l-O-β-D-xylopyranosyl- (1 → 3)-[α-h-rhamnopyranosyl-(1 → 2)]-[β-D-fueopyranoside and (25R) spirost-5-ene-3β,14α-diol-3-β-O-β-L-rhanmopyranosyl- (1 → 2)-[β-D-xylopyranosyl(1 → 4)]-[-β-D-glucopyranoside, were isolated from the Ophiopogon japonicus (L.f.) Ker-Gaw. Their structures were elucidated by spectroscopic methods.
基金the National Natural Science Foundation of China (39925007)the National High Technology Research and Development Program of China (863 Program) (2002AA601021)the Knowledge Innovation Program Key Project of Chinese Academy Sciences (KSCX2-SW-102)
文摘The acute toxicity of Sodium dodecylbenzene sulfonate (SDBS) to subcamersed macrophyte Hydrilla verticillata (L.f) Royle was studied. Chlorophyll contents and the activities of 3 antioxidant enzymes: superoxide dismutase (SOD, EC 1.15.1.1), catalase (CAT, EC 1.11.1.6), peroxidase (POD, EC 1.11.1.7) in the leaves were investigated under different concentrations of SDBS, The chlorophyll contents in leaves of experimental plants decreased gradually, while the electrical conductivity of culture solution increased gradually with the increased dose of SDBS. Under higher concentrations of SDBS (32 mg/L and 128 mg/L) treatment, SOD lost its activities completely after 24 h. The native PAGE analysis indicated the diversity of POD isoenzymes was obvious under different concentrations of SDBS stress.