A novel flavonoid was isolated from the root of Macrothelypteris torresiana （Gaud.） Ching. The structure of the product was identified as 5, 7-dihydroxy-2-（1, 2-isopropyldioxy-4-oxocyclohex-5-enyl）-chromen-4-one o...A novel flavonoid was isolated from the root of Macrothelypteris torresiana （Gaud.） Ching. The structure of the product was identified as 5, 7-dihydroxy-2-（1, 2-isopropyldioxy-4-oxocyclohex-5-enyl）-chromen-4-one on the ground of chemical and spectro-scopic methods.2009 Jin Lan Ruan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana （Gaud.） Ching. The structures of two products were identified as （2S）-5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O...Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana （Gaud.） Ching. The structures of two products were identified as （2S）-5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-6＂-O-acetylglucopyranoside and （2S）- 5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-glucopyranoside on the basis of their chemical and spectral analysis, respectively.展开更多
Six male sterile lines (MSLs) of ramie (Boeh-meria nivea (L.) Gaud.) were grown in dark rooms under the photoperiods of 9.5h, 11h or 12.5h d-1 in spring and summer seasons (dif-ferent environmental temperatures) to te...Six male sterile lines (MSLs) of ramie (Boeh-meria nivea (L.) Gaud.) were grown in dark rooms under the photoperiods of 9.5h, 11h or 12.5h d-1 in spring and summer seasons (dif-ferent environmental temperatures) to test their developmental response to photoperiod and temperature. The MSLs showed little difference in vegetative growth duration, but different de-velopment rates in the reproductive growth stage under the tested conditions. Higher tem-perature (grown in summer) mainly accelerated vegetative growth, while the short photoperiod treatment accelerated the reproductive growth of the MSLs. Moreover, the short photoperiod treatment combined with higher temperature obviously accelerated both the vegetative and reproductive growth of the MSLs. But the effect of higher temperature decreased, or even dis-appeared along with the photoperiod elongation. The MSLs were divided into 5 photo-temperature response types, based on the flower budding acceleration of short pho-toperiod and the approximate temperature re-sponse index.展开更多
The writings and artistic works of Antoni Tàpies(2009;2011)mirror the influences of the cosmic vision of the Chinese yin-yang.Signs,numbers,and creative procedures related to this correlative thought prevail in h...The writings and artistic works of Antoni Tàpies(2009;2011)mirror the influences of the cosmic vision of the Chinese yin-yang.Signs,numbers,and creative procedures related to this correlative thought prevail in his art.Tàpies integrated different iconological codes from the ancient Chinese thinking into his art to question the existential meaning of the universe and to express his thoughts on the cultural and socio-political controversies of his time.In other words,the images,media,and techniques that he utilized for his works were extensions of his life experiences intertwined with various socio-historical facts and his personal feelings.展开更多
文摘A novel flavonoid was isolated from the root of Macrothelypteris torresiana （Gaud.） Ching. The structure of the product was identified as 5, 7-dihydroxy-2-（1, 2-isopropyldioxy-4-oxocyclohex-5-enyl）-chromen-4-one on the ground of chemical and spectro-scopic methods.2009 Jin Lan Ruan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
文摘Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana （Gaud.） Ching. The structures of two products were identified as （2S）-5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-6＂-O-acetylglucopyranoside and （2S）- 5,7,2＇,5＇-tetrahydroxyflavanone-2＇-O-β-D-glucopyranoside on the basis of their chemical and spectral analysis, respectively.
文摘Six male sterile lines (MSLs) of ramie (Boeh-meria nivea (L.) Gaud.) were grown in dark rooms under the photoperiods of 9.5h, 11h or 12.5h d-1 in spring and summer seasons (dif-ferent environmental temperatures) to test their developmental response to photoperiod and temperature. The MSLs showed little difference in vegetative growth duration, but different de-velopment rates in the reproductive growth stage under the tested conditions. Higher tem-perature (grown in summer) mainly accelerated vegetative growth, while the short photoperiod treatment accelerated the reproductive growth of the MSLs. Moreover, the short photoperiod treatment combined with higher temperature obviously accelerated both the vegetative and reproductive growth of the MSLs. But the effect of higher temperature decreased, or even dis-appeared along with the photoperiod elongation. The MSLs were divided into 5 photo-temperature response types, based on the flower budding acceleration of short pho-toperiod and the approximate temperature re-sponse index.
文摘The writings and artistic works of Antoni Tàpies(2009;2011)mirror the influences of the cosmic vision of the Chinese yin-yang.Signs,numbers,and creative procedures related to this correlative thought prevail in his art.Tàpies integrated different iconological codes from the ancient Chinese thinking into his art to question the existential meaning of the universe and to express his thoughts on the cultural and socio-political controversies of his time.In other words,the images,media,and techniques that he utilized for his works were extensions of his life experiences intertwined with various socio-historical facts and his personal feelings.
基金National Natural Science Foundation of China(30270849),High-Tech Research and Development Program of China (2001AA241211) and Hunan Provincial Natural Science Foundation (04JJ3016)
