[Objective] This paper aims to study a new method of extracting pumpkin polysaccharide from pumpkin. Single factor experiments were conducted to examine the effects of extracting time,temperature,the solid-liquid rati...[Objective] This paper aims to study a new method of extracting pumpkin polysaccharide from pumpkin. Single factor experiments were conducted to examine the effects of extracting time,temperature,the solid-liquid ratio and pH value on the extraction yield of polysaccharide from pumpkin. [Method] The best enzyme ratio and extraction conditions for complex enzymes extraction were determined through orthogonal tests. Scavenging ·OH and O-2 activities of pumpkin polysaccharides were also investigated by salicylic acid and improved self-oxidation of o-pheno methods respectively. [Results] The results showed that the biggest extraction yield of polysaccharide from pumpkin can be got when adding 1% cellulose enzyme,1.5% pectinase,1.0% papain and Na2HPO4-citric acid buffer solution (pH was 4.6),and oscillating for 30 min under water at 40 ℃ with the solid-liquid ratio of 1:30. In addition,pumpkin polysaccharides had a strong activity of eliminating ·OH,but very weak activity to scavenge O-2. [Conclusion] This study provided basic data for research and application of Pumpkin polysaccharide.展开更多
Objective To study the effect of Qinglongyi polysaccharides (QP) in the exocarp of Juglans mandshurica on the complex mobility of erythrocytes in S180 mice. Methods Erythrocytes were collected and prepared into suspen...Objective To study the effect of Qinglongyi polysaccharides (QP) in the exocarp of Juglans mandshurica on the complex mobility of erythrocytes in S180 mice. Methods Erythrocytes were collected and prepared into suspensions, and the complex mobility of cells was measured using high performance capillary electrophoresis (HPCE). Optimized experimental conditions were as follows: 50 cm × 75 μm capillary, buffer for electrophoresis; phosphate solution containing hydroxypropylmethyl cellulose (0.1 mol/L, pH 7.4), injection pressure 3.448 kPa, injection time 10 s, separation voltage 20 kV, and column temperature 25 ℃. Results The migration time of erythrocytes in S180 mice was longer than that in normal mice, which was 18.09 min for the model group and 12.11 min for the control group, and the complex mobility of erythrocytes in S180 mice was lower than that in normal mice, which was 0.92 × 104 cm2 /(V·s) for the model group and 1.38 × 104 cm2 /(V·s) for the control group. It was also found that S180 mice treated by QP could shorten the migration time and increase the complex mobility of erythrocytes. Conclusion QP could improve the complex mobility of erythrocytes in S180 mice, and HPCE could be used as a powerful tool for determining the physiological state and functions of erythrocytes.展开更多
基金Supported by the Key Scientific and Technological Project of Henan Province (102102110157)the Scientific Research Found Project of Henan University of Urban Construction (2010JZD008)~~
文摘[Objective] This paper aims to study a new method of extracting pumpkin polysaccharide from pumpkin. Single factor experiments were conducted to examine the effects of extracting time,temperature,the solid-liquid ratio and pH value on the extraction yield of polysaccharide from pumpkin. [Method] The best enzyme ratio and extraction conditions for complex enzymes extraction were determined through orthogonal tests. Scavenging ·OH and O-2 activities of pumpkin polysaccharides were also investigated by salicylic acid and improved self-oxidation of o-pheno methods respectively. [Results] The results showed that the biggest extraction yield of polysaccharide from pumpkin can be got when adding 1% cellulose enzyme,1.5% pectinase,1.0% papain and Na2HPO4-citric acid buffer solution (pH was 4.6),and oscillating for 30 min under water at 40 ℃ with the solid-liquid ratio of 1:30. In addition,pumpkin polysaccharides had a strong activity of eliminating ·OH,but very weak activity to scavenge O-2. [Conclusion] This study provided basic data for research and application of Pumpkin polysaccharide.
基金National Natural Science Foundation of China (30600816)Heilongjiang Province Natural Science Foundation (D200836)
文摘Objective To study the effect of Qinglongyi polysaccharides (QP) in the exocarp of Juglans mandshurica on the complex mobility of erythrocytes in S180 mice. Methods Erythrocytes were collected and prepared into suspensions, and the complex mobility of cells was measured using high performance capillary electrophoresis (HPCE). Optimized experimental conditions were as follows: 50 cm × 75 μm capillary, buffer for electrophoresis; phosphate solution containing hydroxypropylmethyl cellulose (0.1 mol/L, pH 7.4), injection pressure 3.448 kPa, injection time 10 s, separation voltage 20 kV, and column temperature 25 ℃. Results The migration time of erythrocytes in S180 mice was longer than that in normal mice, which was 18.09 min for the model group and 12.11 min for the control group, and the complex mobility of erythrocytes in S180 mice was lower than that in normal mice, which was 0.92 × 104 cm2 /(V·s) for the model group and 1.38 × 104 cm2 /(V·s) for the control group. It was also found that S180 mice treated by QP could shorten the migration time and increase the complex mobility of erythrocytes. Conclusion QP could improve the complex mobility of erythrocytes in S180 mice, and HPCE could be used as a powerful tool for determining the physiological state and functions of erythrocytes.
文摘以多糖得率为研究指标,设计正交试验和响应面优化试验,对复合酶的组成和微波辅助复合酶法提取多糖的工艺条件进行了优化。确定复合酶纤维素酶、木瓜蛋白酶、果胶酶的最佳组成质量比为1∶2∶2,提取工艺为微波辐射时间10 min,酶解时间1.2 h,提取剂p H 4.0,酶解温度58℃。在此最佳条件下,北五味子多糖平均得率达到14.87%,优于传统热水回流法、微波辅助热水回流法、超声波辅助法和纤维素酶法4种提取技术。微波辅助复合酶法操作简单,耗费时间短,提取温度较低且多糖得率高,为北五味子多糖的工业化生产提供了理论依据及数据支撑。
