Effects of light intensity on growth, development and formation on Fagopy- rum cymosum were explored with natural light intensities at 100%(A), 85.2%(B), 75.8%(C) and 59.7%(D). The results showed that the decl...Effects of light intensity on growth, development and formation on Fagopy- rum cymosum were explored with natural light intensities at 100%(A), 85.2%(B), 75.8%(C) and 59.7%(D). The results showed that the decline of light intensity re- duced nutrient growth period, so that plant growth stage entered in advance and extended, which indicated that the decline of light intensity would lower leaf number and area, the number of twigs from the stem, as well as photosynthate. Further- more, the reduction degree increased upon light intensity decrease degree, and the proper shading improved stem height and leaf area enhanced before growth term.展开更多
目的探讨金荞麦乙醇提取物乙酸乙酯的萃取部分(待测样品)的抑菌作用,并对此部分进行分离纯化以研究其抗菌活性的物质基础。方法与复方板蓝根颗粒做对比,采用平皿稀释法及动物实验对待测样品进行体外及体内实验,测定其对各试验菌的最小...目的探讨金荞麦乙醇提取物乙酸乙酯的萃取部分(待测样品)的抑菌作用,并对此部分进行分离纯化以研究其抗菌活性的物质基础。方法与复方板蓝根颗粒做对比,采用平皿稀释法及动物实验对待测样品进行体外及体内实验,测定其对各试验菌的最小抑菌浓度(M IC)和对肺炎链球菌感染小鼠的体内保护作用。并采用多种色谱方法对此部分进行分离纯化。结果体外抑菌试验表明,待测样品对乙型溶血性链球菌、肺炎球菌有明显的抑制作用;体内抑菌实验表明此部分对肺炎球菌菌株所致的小鼠感染有保护作用;从该活性部分分离得到8个化合物为:反式对羟基桂皮酸甲酯(trans-p-hydroxy c innam ic m ethy l ester,I),3,4-二羟基苯甲酰胺(3,4-d ihydroxybenzam ide,II),原儿茶酸(protocatechu ic ac id,III),原儿茶酸甲酯(protocatechu ic ac id m ethy l ester,IV),木犀草素(lu teo lin,V),槲皮素(querc itrin,V I),芸香苷(ru tin,V II),(-)-表儿茶素[(-)-ep icatech in,V III]。结论待测样品在体内及体外均有较强的抑菌活性,而具有抗菌作用的物质基础为酚酸类及黄酮类化合物。展开更多
基金Special Funds for Fundamental Work of Ministry of Science and Technology(2006BAD13B02-13)~~
文摘Effects of light intensity on growth, development and formation on Fagopy- rum cymosum were explored with natural light intensities at 100%(A), 85.2%(B), 75.8%(C) and 59.7%(D). The results showed that the decline of light intensity re- duced nutrient growth period, so that plant growth stage entered in advance and extended, which indicated that the decline of light intensity would lower leaf number and area, the number of twigs from the stem, as well as photosynthate. Further- more, the reduction degree increased upon light intensity decrease degree, and the proper shading improved stem height and leaf area enhanced before growth term.
文摘目的探讨金荞麦乙醇提取物乙酸乙酯的萃取部分(待测样品)的抑菌作用,并对此部分进行分离纯化以研究其抗菌活性的物质基础。方法与复方板蓝根颗粒做对比,采用平皿稀释法及动物实验对待测样品进行体外及体内实验,测定其对各试验菌的最小抑菌浓度(M IC)和对肺炎链球菌感染小鼠的体内保护作用。并采用多种色谱方法对此部分进行分离纯化。结果体外抑菌试验表明,待测样品对乙型溶血性链球菌、肺炎球菌有明显的抑制作用;体内抑菌实验表明此部分对肺炎球菌菌株所致的小鼠感染有保护作用;从该活性部分分离得到8个化合物为:反式对羟基桂皮酸甲酯(trans-p-hydroxy c innam ic m ethy l ester,I),3,4-二羟基苯甲酰胺(3,4-d ihydroxybenzam ide,II),原儿茶酸(protocatechu ic ac id,III),原儿茶酸甲酯(protocatechu ic ac id m ethy l ester,IV),木犀草素(lu teo lin,V),槲皮素(querc itrin,V I),芸香苷(ru tin,V II),(-)-表儿茶素[(-)-ep icatech in,V III]。结论待测样品在体内及体外均有较强的抑菌活性,而具有抗菌作用的物质基础为酚酸类及黄酮类化合物。