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对灰树花菌丝体进行提取纯化,得到菌丝体多糖。通过Sephadex G200柱层析图谱分析,证明灰树花菌丝体多糖为均一组分。通过小鼠降血脂实验研究,菌丝体多糖对小鼠血脂的具有明显调节作用。高血脂症模型小鼠在实验条件下给药剂量为50 mg/(kg · d)时可达到治愈的程度。灰树花菌丝体多糖具有明显的降血脂作用。 相似文献
73.
文章研究了KBT—ZTC絮凝剂对合欢皮总多糖的絮凝纯化工艺,通过单因素和正交实验,得到优化的工艺条件:KBT—ZTC的A、B组分质量体积比为各0.40mL/g,絮凝温度35℃,絮凝时间2h,药液浓缩比1:10,得到多糖保留率、脱蛋白率和纯度分别为90.81%、52.89%和49.65%,均高于水提醇沉工艺的纯化效果. 相似文献
74.
探讨黄柳菇多糖对力竭运动大鼠应激性溃疡的预防效果。方法:30只SD大鼠随机分为安静对照组、力竭运动组和力竭运动服药组。共6周训练,第7周第1 d进行力竭运动后即刻,观察各组大鼠胃溃疡指数,胃组织结构、及超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、丙二醛(MDA)和一氧化氮合酶(NOS)、内皮素(ET)等指标的变化。结果:力竭运动后大鼠发生应激性溃疡,力竭运动组与安静组相比,各项抗氧化酶的活性明显下降,丙二醛含量显著增加,溃疡指数升高,力竭运动服药组溃疡指数、丙二醛含量较力竭运动组下降,抗氧化酶的活性较力竭运动组有显著提高。结论:黄柳菇多糖有很好的抗氧化作用,并能缓解剧烈运动中胃粘膜的缺血状态,起到保护胃粘膜的作用,从而有效预防应激性溃疡的发生。 相似文献
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为了探测陇西栽培蒙古黄芪的表型多样性及自然类型,对该地栽培蒙古黄芪的11个主要生物学性状进行了主成分分析和Q型聚类分析. 多元统计分析表明,陇西栽培蒙古黄芪在生物学性状上存在较大的变异,尤其在果荚颜色、种子花纹及茎色等性状上显著分化,形成了红色类型、红荚绿茎类型和绿色类型等3个主要蒙古黄芪自然类型,因而该地栽培的蒙古黄芪是一个复杂的异质群体. 相似文献
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五种黄芪属植物的核型分析 总被引:1,自引:0,他引:1
刘玉红 《中国科学院研究生院学报》1984,22(2):125-127
The karyotypes of five species in Astragalus (A. dahuricus DC., A. mongolicus
Bunge., A. adsurgens Pall., A. melilotoides Pell., A. huangheensis H. C. Fu., Y. H. Liu)
were studied. Among them, the karyotypes of A. dahuricus and A. melilotoides are re-
ported for the first time. While A. melilotoides is tetraploid (2n=4X=32), all the others
are found to be diploid (2n= 2X = 16). Based on the comparison of karyotypes, the evolu-tionary order of these 5 species is discussed. 相似文献
77.
In this paper, crude monkshood polysaccharide was isolated from Radix Aconiti Lateralis Preparata. The effects of crude monkshood
polysaccharide on Escherichia coli and Staphylococcus aureus were investigated by microcalorimetry. The power-time curves of the bacterial growth at various concentrations (c) of crude monkshood polysaccharide were plotted with a TAM air isothermal microcalorimeter at 37 °C. The growth rate constant
(μ), inhibitory ratio (I), peak-height (P
m), and peak-time (t
m) were calculated. From the data, the relationship between μ and c also was established. The growth rate constant μ decreased with the increasing concentrations of crude monkshood polysaccharide.
Moreover, P
m reduced and t
m increased with increasing concentrations. The experimental results revealed that crude monkshood polysaccharide had inhibitory
activity towards S. aureus and E. coli. Results obtained from our study strongly suggest that microcalorimetry is a fast, simple, and more sensitive technology
that can be easily performed to study the effect of drugs on bacteria. 相似文献
78.
为了提高黑木耳多糖的抗凝血功能,应用微生物发酵技术转化黑木耳多糖得到抗凝血活性更强的黑木耳多糖衍生物.研究了黑木耳多糖转化的最佳发酵条件,比较了未转化和转化后的黑木耳多糖的体外抗凝血功能.通过响应面和正交试验得出最佳转化条件:将浓度4.0 mg/m L的黑木耳酸性多糖AAP3溶液与对羟基苯甲酸充分混合(体积比为40∶1),调p H至6.0,接种枯草芽孢杆菌Bs-07,在温度为35℃,旋转摇床转速为120 r/min的条件下,发酵48 h,转化率达40%以上.检测转化后黑木耳多糖衍生物APTT,PT和TT的数据结果显示,转化后黑木耳多糖衍生物体外抗凝血功能得到了明显提高. 相似文献
79.
实验模拟泡茶方式浸取得溪黄草的水提样品溶液,并用苯酚硫酸法测定了样品溶液的多糖浓度,计算了溪黄草的多糖含量,为3.72%,为科学服用溪黄草提供了客观依据. 相似文献
80.