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薄层扫描法测定7种腹水草属植物中熊果甙的含量 总被引:3,自引:0,他引:3
本文用薄层扫描法测定了7种腹水草属药用植物中熊果甙的含量,并对提取及定量方法进行了考察。 相似文献
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Taeko Tada 《Journal of plant research》1987,100(1):9-16
Seedling establishment of a perennial,Veronicastrum sibiricum ssp.japonicum colonizing at 1,600 m altitude in Nikko National Park was studied for two years. About half of the first-year seedlings died
during the growing season and 45–74 per cent of the seedlings surviving the first summer died during the following winter
season. This winter mortality depended on the end-of-season size of the seedling in the previous autumn and was caused mainly
by the absence of perennation buds. Seedlings which had emerged on bare ground attained larger size and had higher winter
survival than seedlings in a mat of moss. Seedlings germinating in early season attained larger size and had higher probability
of winter survival than seedlings germinating in later season. 相似文献
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《化学与生物多样性》2018,15(1)
Four new ( 1 – 4 ) and one known ( 5 ) acylated iridoid glycosides were isolated from the aerial parts of Veronicastrum sibiricum (L.) Pennell . The chemical structures of the isolated compounds were determined to be 3″,4″‐dicinnamoyl‐6‐O‐rhamnopyranosyl‐10‐O‐bergaptol‐5,7‐bisdeoxycynanchoside ( 1 ), 3″,4″‐dicinnamoyl‐6‐O‐rhamnopyranosylpaulownioside ( 2 ), 2″,4″‐dicinnamoyl‐6‐O‐rhamnopyranosylcatalpol ( 3 ), 3″,4″‐dicinnamoyl‐6‐O‐rhamnopyranosylaucubin ( 4 ), and 3″,4″‐dicinnamoyl‐6‐O‐rhamnopyranosylcatalpol ( 5 ) using spectroscopic techniques. Among these compounds, compound 5 increased antioxidant response element (ARE) luciferase activity. 相似文献
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Yijia Qi Weiming Ren Haixia Zhang Gang Chen Weiyi Huang Xuexia Li Jie He Weichun Zhao 《化学与生物多样性》2021,18(3):e2000864
Veronicastrum axillare polysaccharides (VAP) were isolated by cellulase-assisted digestion. The optimum conditions (2 % cellulase, 47 °C for 2.5 h, then, 95 °C for 2.5 h, pH 4.1, solid/liquid ratio 1 : 7.6) were identified by a combination of single factor optimization and response surface DOE (design of experiment) methods, and achieved a yield of 4.7 %. Treatment with 1 % TCA for 10 min, then, 2 % DEAE-cellulose removed protein and colored impurities. Purified VAP retained most of the radical-scavenging activities and GES-1 cell protection capability in vitro, indicating VAP were the key active components of V. axillare. Some molecular features were identified by FT-IR and NMR analyses. The molecular weight was estimated from DOSY NMR experiments to be around 21 kDa. There were 6.3 % uronic acid residues in the VAP. The constituent sugars after TFA hydrolysis were identified by HPLC to include glucose, arabinose, rhamnose, galactose, and xylose in a molar ratio of 405 : 259 : 82 : 42 : 1. 相似文献
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