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猴头菇子实体碱溶性葡聚糖的分离纯化 总被引:2,自引:0,他引:2
猴头菇(Hericiumerinaceum)又名猴菇、猴头蘑、猴头菌、刺猬菌,自古以来被视为珍贵的中药药材。日本学者从猴头菇子实体中首次发现了数种新的生理活性物质,如对海拉细胞的繁殖有明显抑制作用的酚类物质[1]和脂肪酸[2]、3种对神经生长因子的合成有显著促进作用的化学物质[3],3种 相似文献
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着重介绍大麦葡聚糖研究现状。β-葡聚糖是大麦籽粒和糊粉层细胞壁的主要成份 ,可参于人体内血清中的葡萄糖水平调节 ,降低胆固醇和低密度脂蛋白的含量 ,以及在保键食品上的应用潜力。 相似文献
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为了研究酵母葡聚糖对金黄色葡萄球菌油乳剂灭活苗免疫新西兰兔效果的影响,将其添加到金黄色葡萄球菌油乳剂灭活苗中,配制成低(5 g/L)、中(10 g/L)、高(15 g/L)3个剂量的酵母葡聚糖金黄色葡萄球菌油乳剂灭活苗,同时用不添加酵母葡聚糖的金黄色葡萄球菌油乳剂灭活苗和生理盐水作为对照,分别给每只新西兰兔皮下注射1 mL,在注射后第7、14、21、31、41和51天,分别采血检测新西兰兔淋巴细胞转化率和抗体水平。结果表明,中剂量(10 g/L)的酵母葡聚糖金黄色葡萄球菌油乳剂灭活苗能明显提高新西兰兔的淋巴细胞转换率和血清抗体水平。说明灭活苗中添加适量的酵母葡聚糖能提高疫苗的免疫效力,增强新西兰兔的免疫功能。 相似文献
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[目的]研究提高葡聚糖发酵产率的条件。[方法]以蔗糖转化为葡聚糖的转化率作为参考标准,通过单因素实验和正交实验确定了肠膜明串珠菌发酵产葡聚糖的最佳条件。[结果]肠膜明串珠菌发酵产葡聚糖的最适宜培养基配方为:蔗糖100.0 g/L,蛋白胨5.0g/L;最佳发酵条件为:温度25℃,活化液接种量2.5%,发酵罐转速150 r/min,起始pH值7.5。该实验测得的最大蔗糖转化率为70.0%。[结论]蔗糖和蛋白胨是肠膜明串珠菌生长所必需的碳源和氮源,对于葡聚糖的产量有很大影响;发酵温度、发酵罐转速和发酵液pH值对蔗糖转化率的影响很大,而活化液接种量对蔗糖转化率的影响不大。 相似文献
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CTPS-01, a water-soluble polysaccharide, was obtained from the root of Cudrania tricuspidata and estimated to have an average molecular weight of 5.9 x 10(3) and to be composed of glucose residues, solely. It contains an average repeating unit of decasaccharide, having a backbone consisting of 1,4-linked alpha-D-glucopyranosyl residues, to which a side chain consisting of terminal and 1,4-linked alpha-D-glucopyranosyl residues is attached at position O-6 of the branching residues. 相似文献
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Massimiliano CarciofiShahnoor S. Shaik Susanne L. Jensen Andreas BlennowJan T. Svensson Éva VinczeKim H. Hebelstrup 《Journal of Cereal Science》2011,54(3):339-346
Plant starch is naturally phosphorylated at a fraction of the C6 and the C3 hydroxyl groups during its biosynthesis in plastids. Starch phosphate esters are important in starch metabolism and they also generate specific industrial functionality. Cereal grains starch contains little starch bound phosphate compared with potato tuber starch and in order to investigate the effect of increased endosperm starch phosphate, the potato starch phosphorylating enzyme glucan water dikinase (StGWD) was overexpressed specifically in the developing barley endosperm. StGWD overexpressors showed wild-type phenotype. Transgenic cereal grains synthesized starch with higher starch bound phosphate content (7.5 (±0.67) nmol/mg) compared to control lines (0.8 (±0.05) nmol/mg) with starch granules showing altered morphology and lower melting enthalpy. Our data indicate specific action of GWD during starch biosynthesis and demonstrates the possibility for in planta production of highly phosphorylated cereal starch. 相似文献
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