连翘叶黄酮的体外抗氧化作用

为研究连翘叶黄酮(Forsythia suspenseleaves flavonoids,FLF)的体外抗氧化作用,用水杨酸法研究FLF清除.OH的效果,并测定了FLF对连苯三酚自氧化体系的抑制作用。用硫代巴比妥酸(TBA)法测定了小鼠4种器官及肝线粒体、微粒体中的丙二醛(MDA)含量,用分光光度法测定了小鼠红细胞溶血和肝线粒体膨胀程度。结果表明,FLF可以清除.OH,抑制连苯三酚自氧化,并抑制.OH所致丙二醛的产生,减少红细胞溶血,减轻肝线粒体膨胀程度。说明FLF具有明显的抗氧化活性。

连翘叶黄酮对力竭运动小鼠的抗疲劳作用研究

探讨连翘叶黄酮(flavonoids from Forsythia suspense leaves,FFL)对力竭运动小鼠的抗疲劳作用。36只ICR小鼠随机分为对照组、连翘叶黄酮小剂量组、连翘叶黄酮大剂量组,每组12只,给药组小鼠每日分别按1.5g生药/kg体重和3.0g生药/kg体重剂量以连翘叶黄酮灌胃,对照组小鼠以生理盐水灌胃,连续20d后,将各组小鼠置于水中游泳至力竭,记录力竭运动时间,并测定各组小鼠的肌糖原、肝糖原、全血乳酸(LD)、血尿素氮(BUN)、谷胱甘肽过氧化物酶(GSH-PX)、超氧化物歧化酶(SOD)和丙二醛(MDA)各项生化指标。连翘叶黄酮降低血乳酸和血清尿素氮含量,提高肝糖原、肌糖原的含量,降低MDA的含量,提高SOD、GSH-PX的活性。连翘叶黄酮具有一定的抗疲劳作用。

A New Antifungal Flavonol Glycoside from Hypericum perforatum

In addition to six known flavonoids quercitrin, hyperoside, avicularin, rutin, quercetin and kaemferol, a new flavonol glycoside named 6″_O_acetyl quercetin 3_O_β_ D _alloside (1) was isolated from the aerial parts of Hypericum perforatum L. The structures were determined on the basis of spectroscopic methods (UV, IR, FAB_MS, 1H_NMR and 13 C NMR). Antifungal assay of all compounds showed that metabolite 1, quercitrin and quercetin were inhibitory to the growth of phytopathogenic fungus Helminthosporium sativum Pamel King et Bakke with minimum inhibitory concentrations (MICs) of 25, 50 and 50 μg/mL, respectively. Moreover, glycoside 1 and quercitrin were also shown to be able to inhibit the growth of Fusarium graminearum Schw. with MIC of 100 μg/mL. The MICs of ketoconazole used as control against the test fungi were 0.5 μg/mL in our assay.

豫西地产药材购销现状

十一月十八日，豫西地区普遍降雪，飞飞扬扬一直持续到19日，满山遍野银装素裹，分外妖娆。

带状疱疹方

验方1．金牛解毒汤2．二黄连翘方3．

An Isopropyldioxy Flavonol from Hypericum perforatum L.

Aim Isolation and structural elucidation of the constituents from the aerialpart of Hypericum perforatum L. Methods Column chromatography and TLC were used to isolate chemicalconstituents. Physico-chemical characterization and spectroscopic analysis were employed forstructural identification. Results Three flavonols were isolated and identified. Conclusion Compound1 is a novel natural product and its structure has been characterized to be 3, 5, 7-trihydroxy-3',4'-isopropyldioxy-flavone.

HPLC波长切换法同时测定小儿热速清颗粒中9种成分的含量

目的:建立高效液相色谱法(HPLC)同时测定小儿热速清颗粒中9种活性成分的含量。方法:采用HPLC法,同时测定小儿热速清颗粒中绿原酸、葛根素、连翘酯苷A、黄芩苷、柴胡皂苷a、柴胡皂苷d、连翘苷、大黄素、大黄酚的含量,采用ZORBAX Eclipse XDB-C18色谱柱(250 mm×4.6 mm,5μm),流动相为乙腈(A)-0.05%磷酸溶液(B),梯度洗脱,检测波长为210 nm(柴胡皂苷a、柴胡皂苷d)、260 nm(黄芩苷、连翘苷、葛根素、大黄素、大黄酚)、330nm(绿原酸、连翘酯苷A),流速0.8 ml·min^-1,柱温30℃,进样量10μl。结果:绿原酸、葛根素、连翘酯苷A、黄芩苷、柴胡皂苷a、柴胡皂苷d、连翘苷、大黄素、大黄酚检测质量浓度的线性范围分别为3.00~35.98,61.08~733.0,4.48~53.71,133.7~1604,4.356~52.27,5.236~62.83,2.736~32.84,6.724~80.69,13.46~161.5μg·ml^-1(r为0.9991~0.9998),平均加样回收率分别为98.5%,98.9%,98.4%,99.1%,98.7%,98.3%,98.2%,98.2%,98.1%(RSD<2.0%,n=6)。结论:该方法简单、有效、结果准确,可用于小儿热速清颗粒中上述9种活性成分含量的同时测定。