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M. R. Mohamadi M. Kataoka L. Mahmoudian M. Jabasini Y. Shinohara Y. Baba 《Chromatographia》2005,61(7-8):339-344
We have investigated the accuracy and reproducibility of DNA quantitation on the DNA Lab-Chip and the relationship of these to the size and concentration of the DNA fragments. We found that quantitation of small DNA fragments, i.e. less than 200 bp, suffers from high relative error which can be improved by using an internal standard of similar size to the sample. The effects of trace chloride ion on quantitation error and sensitivity of the DNA Lab-Chip were also studied, and it was revealed that 0.2 mM chloride ion reduces quantitation sensitivity by 30% and increases the relative error. We also studied the effects of purification on quantitation errors in analysis of PCR products from cloning vector pUC118 and showed that use of an unpurified sample reduces chip sensitivity by 25%.Dedicated to Professor K. Jinno on the occasion of his 60th birthday.Revised: 9 December 2004 and 17 January 2005 相似文献
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用未涂敷毛细管电泳分离DNA片段 总被引:1,自引:0,他引:1
用内壁未涂敷毛细管,以羟乙基纤维素的无胶筛分介质,在6min内分离了λDNA/EcoRI+HindⅢ片段,探讨了DNA片段在未涂敷毛细管中的分离机理,讨论了羟乙基纤维素和缓冲溶液浓度及电压对分离的影响,考察了DNA片段迁移时间的重现性。 相似文献
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糖类的毛细管电泳及芯片毛细管电泳 总被引:6,自引:0,他引:6
糖类化合物在生物体内发挥多方面的作用。糖研究的复杂性在于其结构的复杂多变。高效毛细管电泳作为一种快速、高效的分离分析手段已广泛应用于糖的研究。芯片毛细管电泳是近几年来发展起来的新的分析技术 ,并已经在生命科学的研究中得到较广泛的应用。就各种糖类化合物的毛细管电泳的分析策略、检测条件及糖类化合物的芯片毛细管电泳进行了阐述 ,共 4 8篇。 相似文献
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Atpresent,thecommonlyusedmethodforanalyzingherbalmedicinesishighperformanceliquidchromatography(HPLC).However,theuseofHPLCisrestrictedformanyreasons.Themostseriousproblemisthatthechromatographiccolumniseasilycontaminated.ComparedwithHPLC,capillaryelectrophoresis(CE)ischaracterizedwithhighefficiency,rapidity,lowcostandmultiplemodestobechosen.Inaddition,thecapillarycanbeeasilyregenerated.SoCEisidealforanalyzing"dirty"samples,suchasChineseherbalmedicines.Infact,studiesintheareaarebecoming… 相似文献
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以大肠杆菌(E.coli)为对象,采用环介导恒温扩增技术(LAMP)对其扩增,在实验室自制的毛细管电泳-诱导荧光平台上建立了LAMP产物的检测新方法。引物F3,B3,FIP,BIP扩增的E.coli LAMP产物大小为240 bp。优化的毛细管电泳条件为:毛细管有效长度/总长度(10 cm/15 cm),筛分介质溶液为0.5%羟乙基纤维素(1 300 K),电场强度(100 V/cm),进样条件(100 V/cm,1.0 s)。毛细管电泳时,DNA长度在100~500 bp范围内与其迁移时间呈线性关系,相关系数为0.996。在相同毛细管电泳条件下对E.coli LAMP产物进行分析,并利用这种线性关系在电泳图中对E.coli LAMP产物与假阳性产物做区分,结果表明,毛细管电泳技术不仅可在15 min内实现LAMP产物及附加产物的快速检测,而且可快速区分LAMP阳性及假阳性实验产物。采用建立的毛细管电泳快速检测LAMP产物的方法,对AB0174 E.coli基因实施了LAMP,结果表明该方法适合DNA LAMP产物的快速检测。 相似文献
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用于毛细管电泳分离DNA的聚合物介质的研究进展 总被引:1,自引:0,他引:1
综述了用于毛细管电泳分离DNA及测序的聚合物介质的研究进展。这类聚合物主要有均聚物、无规共聚物、嵌段共聚物、接枝共聚物、共混聚合物、准互穿聚合物网络和微交联纳米凝胶聚合物,并对各种结构的聚合物的筛分性能进行了比较。 相似文献
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Silver-coated capillaries were used for direct sample injection in multiplexed capillary electrophoresis. The absence of an additional electrode simplifies mechanical alignment, reduces contamination, and decreases the amount of sample needed. Capillaries were coated by a silver paint which is a suspension of silver particles in an organic solvent. To provide electrical contact, the upper part of the capillary and a platinum wire were wound together by a copper wire. Electrical resistance from the platinum wire to the tip of the capillary was small enough (7 ω to 50 ω) to inject large amounts of DNA samples. Electrokinetic injection from eight separate sample vials to eight capillaries was demonstrated for DNA sequencing by multiplexed capillary electrophoresis. Signal-to-noise ratio and resolution were good enough to call up to 350 base pairs. 相似文献
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毛细管阵列电泳与规模化DNA测序 总被引:5,自引:0,他引:5
根据 10 0 80份基因组DNA测序的结果 ,讨论了毛细管阵列电泳测序方法的技术特点 ,并对影响测序结果的一些因素进行了分析。在此基础上与平板凝胶电泳方法进行比较 ,显示了毛细管阵列电泳的优点。同时也对大规模测序技术环节之间的协调进行了探讨 。 相似文献
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毛细管电泳的手性拆分(文献综述) 总被引:2,自引:0,他引:2
根据最近文献,对毛细管电泳在手性拆分领域中的应用和发展进行了评述,包括各种操作模式和各类手性选择剂,进一步评述了手性拆分机理的研究,显示出毛细管电泳是手性拆分的一种高效、快速、简便的分离手段。 相似文献
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甘露醇添加剂对毛细管无胶筛分电泳分离DNA的影响 总被引:6,自引:0,他引:6
在纤维素衍生物筛分体系中加入甘露醇添加剂大大提高了分离能力,在较低筛分剂浓度条件下可得到满意的分离。同时还对甘露醇影响分离的机理做出了解释。 相似文献