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分离和提纯

分离和提纯的相关文献在1986年到2023年内共计1883篇,主要集中在中国医学、基础医学、药学 等领域,其中期刊论文131篇、专利文献241201篇;相关期刊73种,包括医药导报、福建医科大学学报、华中科技大学学报(医学版)等; 分离和提纯的相关文献由4609位作者贡献,包括陈亮、李勇、吴喜龙等。

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期刊论文>

论文:131 占比:0.05%

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论文:241201 占比:99.95%

总计:241332篇

分离和提纯—发文趋势图

分离和提纯

-研究学者

  • 陈亮
  • 李勇
  • 吴喜龙
  • 王欢
  • 贺小塘
  • 周宇
  • 於兵
  • 李刚
  • 蓝伟光
  • 谈俊
  • 期刊论文
  • 专利文献

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    • 符红梅
    • 摘要: 酸碱盐是初中化学教学的重点和难点,综合性比较强,需要我们对所学内容加以整合。不少同学感觉比较困难,我们可以以专题的形式将知识点分解,实现“逐个击破”。就来系统地学习“酸碱盐的分离和提纯”。一、基本原理分离是把混合物中所有的成分一一分开,并且和原来的状态保持一致,不能“旧貌换新颜”。
    • 施小达
    • 摘要: 物质的分离和提纯是每年中考必考的题型之一,以选择、填空形式考查较多,也有以简答或实验形式来考查的。它灵活多变,可以综合考查学生对基础知识的掌握和解题能力。下面通过一些典型例题归纳总结物质分离和提纯的一些方法和技巧。
    • 刘丽亚
    • 摘要: 自然界中的物质绝大多数以混合物的形式存在,单纯的混合虽然不会改变其中某组分的性质,但对于研究其中某物质的性质或将其应用于生产和生活中时,就会受到影响.从化学学科本身以及社会生活和生产的需要考虑,混合物的分离和提纯是非常必要的.在人教版高中化学必修1教材中介绍的分离提纯方法有:过滤、蒸发、蒸馏、萃取、分液,在人教版高中化学选修5《有机化学基础》教材中介绍的分离提纯方法有:蒸馏、重结晶、萃取.
    • 黄立波
    • 摘要: 目的:分析蜡样芽胞杆菌采用VITEK-2全自动微生物鉴定仪检测的结果.方法:使用标准方法对蜡样芽胞杆菌的标准菌株、阳性菌株检测,使用VITEK-2全自动微生物鉴定系统检测,对比两种检测方法的检出时间和检出率.结果:标准方法与VITEK-2全自动微生物鉴定仪在19株蜡样芽胞杆菌检测中符合率为100.00%,缩短检测时间为7~47h.结论:VITEK-2全自动微生物鉴定系统在鉴定蜡样芽胞杆菌中具有较高的准确性,且检测速度更为快捷,操作步骤更为简便等特点,对于食源性疾病监测、食物中毒检测工作中更适合.
    • 陈女婷
    • 摘要: 混合物的分离和提纯是中考化学试题的高频考点和常见题型,也是考查的重点、难点。混合物的分离是指通过适当的方法,把混合物中的各种组分物质彼此分开,并恢复到各物质的原有状态,分别得到纯净物。混合物的提纯(又称除杂)是指通过适当的方法除去混合物中的杂质,以便获得相对纯净的物质。
    • 黄江波; 罗志刚; 刘宇明; 刘利; 何群君; 言彩红; 李建军; 龙向阳
    • 摘要: [Objective] To establish a simple and efficient in vitro isolation and culture system for bone marrow-derived precursor cells (DC) in rats.[Methods] Granulocyte macrophage colony stimulating factor (GM-CSF) and interleukin-4 (IL-4) were used to induce and separate rat bone marrow hematopoietic progenitor cells to get immature dendritic cells after 7 d (imDC),immunomagnetic flow cytometry was used before and after purification of the surface of imDC to test positive expression rate of OX62.Lipopolysaccharide (LPS) lasted for 2 D to stimulate imDC maturation to get mature dendritic cells (mature dendritic cell,mDC),flow cytometry was used to detect imDC and mDC cell surface CD86,CD80,RT1B positive expression rate;ELISA was used to detect the secretion of IL-12 in vitro in two groups of cells,mixed lymphocyte reaction (MLR) was used to determine lymphocyte proliferation ability of cells in two groups.[Results] Purified imDC surface OX62 positive expression rate was 91.9%,significantly higher than that before purification 82.8% (P <0.05);imDC,CD80,CD86 on the surface of the positive expression rates of RT1B were 11.48%,6.25%,77.2%,stimulated by LPS after the maturity of the mDC surface CD86,CD80 and RT1B positive expression rates were 91.38%,93.54%,98.6% imDC;cell IL-12 secretion level (36±9) pg/mL,was significantly lower than that of mDC (228 ±27) pg/mL (P <0.01) MLR results in mDC group;ability to stimulate T lymphocyte proliferation was significantly higher than that of the imDC group.[Conclusion]In this experiment,the cultured cells were identified by three aspects (cell morphology observation,surface molecular markers and functional status),and it was proved that the combination of GM-CSF+ IL-4 could induce high purity and large numbers of DC in vitro;through the purification of immunomagnetic beads,a relatively large number of DC with high purity can be obtained to meet the experimental requirements.%[目的]探讨建立一种简易、高效的体外分离培养、纯化大鼠骨髓来源树突状细胞(DC)的方法.[方法]采用粒细胞-巨噬细胞集落刺激因子(GM-CSF)+白细胞介素-4(IL-4)分离诱导大鼠骨髓来源造血前体细胞7d后得未成熟树突状细胞(immature dendritic cell,imDC),流式细胞仪检测免疫磁珠纯化前后imDC表面OX62阳性表达率.然后脂多糖(LPS)作用2d刺激imDC成熟得成熟树突状细胞(mature dendritic cell,mDC),流式细胞仪检测imDC及mDC细胞表面CD86、CD80、RT1B阳性表达率,ELISA法检测两组细胞的IL-12分泌水平,体外混合淋巴细胞反应(mixed lymphocyte reaction,MLR)测定两组细胞促淋巴细胞增殖的能力.[结果]免疫磁珠纯化后imDC表面OX62阳性表达率为91.9%,明显高于纯化前的82.8%(P<0.05);imDC表面CD86、CD80、RT1B阳性表达率分别是11.48%、6.25%、77.2%,经LPS刺激成熟后的mDC表面CD86、CD80和RT1B阳性表达率分别为91.38%、93.54%、98.6%;imDC细胞的IL-12分泌水平为(36±9)pg/mL,明显低于mDC(228±27)pg/mL(P<0.01);MLR结果中mDC组刺激T淋巴细胞增殖的能力明显高于imDC组.[结论]本实验通过细胞形态观察、表面分子标志和功能状态三方面相结合对所培养细胞进行鉴定,证实联合应用GM-CSF+ IL-4可体外诱导出高纯度、数量多的DC;通过免疫磁珠纯化可获得相对数量多、纯度高的DC以满足实验需要.
    • 肖顺丽; 王敏; 李琦; 曹青云; 高荣凯; 张宏桂
    • 摘要: Objective To study the preparation method and analytical technique of hyperoside from Flos Abelmoschus manihot.Methods Hyperoside was isolated and purified by solvent extract and chromatography, whose structure was determined by 1H-NMR and 13C-NMR. The purity was analyzed by TLC and HPLC.Results The TLC showed that the hyperoside had no impurity spot. The HPLC indicated that the purity reached more than 98.5%.Conclusions The mothod of isolation and purification for hyperoside reported in this paper was simple and economical.%目的 研究黄蜀葵花中金丝桃苷的提取、分离、纯化方法.方法 采用聚酰胺柱层析、梯度洗脱方法提取分离黄蜀葵花中的金丝桃苷,以氢谱和碳谱鉴定其结构,以薄层色谱法、HPLC法进行纯度检查.结果 制得的金丝桃苷经薄层色谱法检查无杂质斑点,经HPLC法检测其纯度98.5%以上.结论 所建立的分离、纯化方法简便,成本低.
    • 李聪; 周玉涛; 朱雪松; 沈定琴
    • 摘要: The plant resources, distribution, extraction, pharmacological effects and its application in medicine of flavonoids procyanidins were reviewed based on the literature, in order to provide the basis for further application and comprehensive development.%通过查阅国内外相关文献,对植物中黄酮类化合物原花青素的植物资源分布、分离提取、药理作用及其在医药等领域的应用进行综述,旨在为原花青素的进一步研究利用及综合开发提供依据.
    • 潘佳欣; 高秀峰; 赵佳浩; 罗亚雄; 吴晓婷; 李永生
    • 摘要: 目的 为了进一步考察促红细胞生成素(EPO)的组织保护作用,构建了高效表达人源性EPO (rhEPO)的原核表达载体,并通过小鼠体内实验考察了其捉红细胞生成活性.方法 构建原核表逸载俸pET30b(+)-rhEPO;转化至大肠杆菌BL21(DE3),获得高效表达重组转化子菌株;Ni-NAT亲和层析纯化融合蛋白;利用网织红细胞指数考察融合蛋白在小鼠体内的促红细胞活性.结果 成功构建pET30b(+)-rhEPO重组子;实现了在原核生物中的表达;纯化后的融合蛋白达到了电泳级纯;其相对分子质量与理论值相符,原核表达的融合蛋白能够显著提高小鼠体内网织红细胞数,可溶性融合蛋白和包涵体蛋白比活性分别是应用化学科1 059.63、727.94 U/mg.结论 构建和表达重组载体pET30b(+)-rhEPO,表达的目的蛋白经分离纯化后具有体内生物学活性,为进一步的功能研究奠定基础.
    • 王丽; 马跃荣
    • 摘要: 目的:通过建立肾原代细胞培养,探讨免疫磁珠分离纯化乳鼠肾血管周细胞的方法。方法选取健康BALB/c乳鼠肾脏,剪碎、消化和过滤制成细胞悬液,原代培养并传代(传3代)。免疫磁珠法分离出神经胶质细胞2型硫酸软骨素糖蛋白(NG-2);倒置相差显微镜观察细胞形态特点,免疫细胞化学检测NG-2、平滑肌肌动蛋白(SMA)和CD31表达,BrdU法检测细胞增殖活性,鉴定是否符合周细胞特征及纯化后的细胞是否具有增殖活性。结果纯化后获取的细胞宽大扁平,形态呈梭形、三角形或多边形并有突起。细胞核椭圆居中,多为单核,偶为双核,细胞质丰富,无接触性抑制生长,符合周细胞形态及生长特征。NG-2和SMA免疫细胞化学染色阳性表达,CD31免疫细胞化学染色阴性表达,符合周细胞特点。分离纯化后的细胞48、72 h细胞增殖率分别为(0.37±0.11)%、(0.42±0.10)%。结论免疫磁珠法可使周细胞从细胞成分复杂的肾组织中分离出来,并具有生物活性,可继续体外培养,为后续研究提供参考依据。%Objective To establish the primary culture by renal cells and to investigate the isolation and purification method of sucking mice renal vessel pericytes by the imunomagnetic bead technique. Methods The kidney of healthy BALB/c sucking mice was selected,cut into pieces,digested and filtered for preparing the cellular suspension. The primary culture and passage(3 generations)were performed;the mimunomagnetic bead technique isolated neurogliocytes(NG-2);the inverted phase contrast microscope was adopted to observe the cellular morphological characteristics ,the immunohistochemistry was used to detect NG-2,SMA and CD31 expression by joint judgement,the cellular proliferation activity was detected by using the BrdU method. Whether meeting pericytes characteristics and whether purified cells having the proliferation activity were identified. Results The cells obtained by purification were wide and flat,the morphologies were fusiform, triangle or polygon with prominence. The cellular nucleus was ellipse and in the middle,the majority were mononucleus,occasionally bi-neucleus,with plentiful cytoplas-ma,without contacting inhibition growth,which conformed to the pericytes morphology and growth characteristics. NG-2 and SMA were positively expressed by immunocytochemical staining,CD31 was negatively expressed,which conformed to the pericytes characteristics. The 48,72 h proliferation activities of isolated and purified cells were (0.37±0.11)%and (0.42±0.10)%respec-tively. Conclusion The imunomagnetic bead method can make the pericytes to be isolated from the kidney with complex cellular compositions,which have biological activity,can continuously culture in vitro and provide the reference basis for subsequent study.
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