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| 1 | 燕麦总多酚的微波辅助提取工艺研究显示文摘以我国裸燕麦为试验材料,微波辅助提取总多酚得率为考察指标,对微波辅助提取工艺方法进行改进,并通过单因素试验和正交试验设计,进一步优化了燕麦总多酚的微波辅助提取工艺。试验结果表明:燕麦总多酚的最佳提取工艺条件为:乙醇浓度70%,微波功率400 W,提取时间30 s,料液比1∶25(g/m L),2级提取。按此工艺进行重复性验证得到燕麦总多酚的平均提取得率为1.667 mg/g,试验结果稳定,而且大大缩短了提取时间。 | 刘仙俊 范向前 史起鹏 王雪虎 戚晓阳 | 2016 | 食品研究与开发2016，37，17： | 19 |
| 2 | Phytochemical analysis,hypotensive effect and antioxidant properties of Myrtus communis L.growing in Algeria显示文摘Objective:To analyze Myrlus communis chemically and evaluate the hypotensive effects and antioxidant properties of methanol,chloroform,ethyl acetate and aqueous extracts from the leaves of this plant.Methods:Total phenolic and flavonoid contents as well as the antioxidant potential of methanol,chloroform,ethyl acetate and aqueous extracts have been investigated by using different in vitro methods.The hypotensive effects of methanol and ethyl acetate extracts were evaluated in anaesthetized rats by using the method of invasive blood pressure recording.Moreover,ethyl acetate extract was subjected to analysis by different chromatographic methods in order to identify new compounds.Results:Chemical analysis of ethyl acetate extract revealed the presence of myrecitin-3-O-α-rhamnoside.Ethyl acetate extract was found to have the highest total phenolic and total flavonoid contents with the values of 435.37 ma gallic acid equivalents/g dried weight and 130.75 mg quercetin equivalent/g dried weight,respectively.Ethyl acetate extract also exhibited the highest activity in scavenging 2.2-diphenyl-1-picrylhydrazyl.2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid),hydroxy]radical and reducing power:whereas,methanol extract exhibited higher chelating activity than ethyl acetate extract did.Chloroform was found to be strong inhibitor of lipid peroxidation in β-carotene bleaching assay(91.19%).ferric thiocyanate method(87.55%).and thiobarbituric acid method(82.59%) as compared to butylated hydroxytoluene.Intravenous administration of methanol and ethyl acetate extract(0.04 to 12 mg/kg body weight) decreased the maximum mean arterial blood pressure with values of 20.6%and 32.49%at 12 mg/kg body weight,respectively in anesthetized rats.Conclusions:This study provides a scientific basis for the use of Myruts communis in traditional medicine as hypertensive agent as well as additional resources for natural antioxidants. | Amel Bouaziz Seddik khennouf Mussa Abu zarga Shtaywy Abdalla Abderahmane Baghiani Noureddine Charef | 2015 | Asian Pacific Journal of Tropical Biomedicine2015，5，1： | 1 |
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