Centrifugation2
RELATIVE CENTRIFUGAL FORCE Figure F.2. Nomogram for R.C.F.Modern day ultracentrifuges can generate forces in excess of 300,000 times that of gravity, forces sufficient to overcome the very cohesion of most molecules (including the metal of the rotor). The force is usually given as some value times that of gravity.The centrifugal force is dependent upon the radius of the rotation of the rotor, the speed at which ......阅读全文
低速离心的概念
中文名称低速离心英文名称low speed centrifugation定 义转速为8000 r/min以下，相对离心力为10 000×g以下的离心。主要用于分离细胞、细胞碎片及培养基残渣等颗粒物。应用学科生物化学与分子生物学（一级学科），方法与技术（二级学科）
低速离心的用途
中文名称低速离心英文名称low speed centrifugation定 义转速为8000 r/min以下，相对离心力为10 000×g以下的离心。主要用于分离细胞、细胞碎片及培养基残渣等颗粒物。应用学科生物化学与分子生物学（一级学科），方法与技术（二级学科）
DNA－Purification－from－Blood－or－Body－Fluids
实验概要试剂盒，操作简单，稍有点贵，还可以接受。实验材料blood实验步骤Protocol: DNA Purification from Blood or Body Fluids(Spin Protocol)This protocol is for purification of total (ge
Preparation－of－Rat－Liver－Cell－Cytosol
These protocols should yield enough cytosol and organelles for 1-200 MT/Organelle motility assays.Solutions and Reagents Freshly removed or flash fro
Estimation－of－Fat－in－Milk－Samples
IntroductionMilk fat measurement is a common task in the dairy industry, because milk fat content is one factor that determines milk price and is nece
移动区带离心的概念
在离心过程中，大小、形状、密度不同的颗粒就会分开，最后收集各区带得到要分离的物质。在此方法中，分离介质对被分离的物质必须是中性无害的，并且密度梯度较低，底部的密度比管顶部的密度大，建立密度梯度的目的是防止扩散。重要的是，待分离颗粒的密度比离心管中任何部分介质的密度都要大。常用的是蔗糖密度梯度离心(s
移动区带离心的技术特点
在离心过程中，大小、形状、密度不同的颗粒就会分开，最后收集各区带得到要分离的物质。在此方法中，分离介质对被分离的物质必须是中性无害的，并且密度梯度较低，底部的密度比管顶部的密度大，建立密度梯度的目的是防止扩散。重要的是，待分离颗粒的密度比离心管中任何部分介质的密度都要大。常用的是蔗糖密度梯度离心(s
Mitochondrial－DNA－Isolation－from－Somatic－Embryogenic－Cell－Cultures－of－Larix
Mitochondrial DNA is isolated by a modification of the methods described by Wilson and Chourey (1984) and Radetzky (1990). Cell cultures at four days
Large－Scale－Tubulin－Preparation
Tubulin is purified from bovine/porcine brain by two cycles of polymerization/depolymerization followed by removal of copurifying proteins on a phosph
Cell－Extraction－Protocol
实验概要Primary tissues are valuable tools for the study of intracellular and extracellular markers which characterize disease states. We have developed
Immunoprecipitation
Immunoprecipitation (IP) is one of the most widely used immunochemical techniques. Immunoprecipitation followed by SDS-PAGE and immunoblotting, is rou
Isolation－of－Total－RNA－from－Animal－Cells－use－RNeasy－Mini－Kit
实验概要Extract the total RNA from animal cells by using RNeasy Mini Kit (QIAGEN No.74104) 主要试剂SDS based extraction solution实验步骤1. Harvest cells.1) Try
A－semipermanent－mounting－medium－for－immunofluorescence－microscopy
A semi-permanent mounting medium for immunofluorescence microscopyMaterials6gm glycerol2.4gm mowiol6ml distilled water12ml Tris buffer 0.2M at pH 8.5M
Preparation－of－Plasmid－DNA－by－Alkaline－Lysis－with－SDS:－Minipreparation
实验概要Plasmid DNA is isolated from small-scale (1-2 ml) bacterial cultures by treatment with alkali and SDS.主要试剂Buffers and Solutions: Alkaline lysis
Immunoprecipitation
实验概要In the IP method, the protein from the cell or tissue homogenate is precipitated in an appropriate lysis buffer by means of an immune complex
Bacic－Immunoprecipitation
实验概要 Immunoprecipitation (IP) is one of the most widely used immunochemical techniques. Immunoprecipitation followed by SDS-PAGE and immunoblotting,
An－Integrative－Procedure－for－Apoptosis－Identification－and－Measurement2
TroubleshootingCritical Steps(1) Don’t trypsinize cells for too long when collecting them.(2) Rotation speed should be no more than 1500 rpm during ce
Polycrystalline－thin－films质谱样品准备
This method of sample preparation produces a uniformlayer of very small crystals on the mass spectrometer's sample stage that are mechanically
Isolation－of－stromal－vascular－cells－from－human－adipose－tissue
Stromal stem cells proliferate in vitro and may be differentiated along several lineages. The scarcity of stromal stem cells in tissues and the la
Protein－extraction－from－whole－tissues－for－IEF
Modified from that of Jay Thelen - University of Missouri-ColumbiaPhenol extraction followed by methanolic ammonium acetate precipitation - an effecti
Isolation－and－Culture－of－Multipotent－Stem－Cells－from－Human－Bone－Morrow
Bone marrow contains three types of stem cells:1. Hematopoietic stem cells give rise to the three classes of blood cells that are found in the circu
浮力密度离心的定义
中文名称浮力密度离心英文名称buoyant density centrifugation定 义密度梯度离心达到平衡时，各种颗粒(分子、病毒、亚细胞成分等)会悬浮在与自身密度相同的区带中而得到分离的依密度分离的离心法。并由此可测得其颗粒密度。密度梯度介质最常用的是氯化铯(CsCl)，因为CsCl能提
Fastfilter－Plasmid－Midi－Kit－Spin－Protocol
实验概要The E.Z.N.A.TM Fastfilter Plasmid Midi Kit combines the power of HiBind® technology with the time-tested consistency of alkaline-SDS lysis of
重组DNA的分离、克隆与测序实验手册5
C. Random fragment end-repair, size selection, and phosphorylationSince both sonicated and nebulized DNA fragments usually contain single-stranded end
重组DNA的分离、克隆与测序实验手册6
Electroporation ProtocolPreparation of Electro-competent Cells:1. Grow XL1-Blue cells on a tetracycline plate (20 ug tet/ml of LB agar)2. Inoculate 3
Fastfilter－Plasmid－Midi－Kit－Vacuum/Spin－Protocol
实验概要The E.Z.N.A.TM Fastfilter Plasmid Midi Kit combines the power of HiBind® technology with the time-tested consistency of alkaline-SDS lysis of
Dissociation－of－Cells－from－Primary－Tissue
实验概要A common method to obtain single cell suspensions from primary tissue is enzymatic disaggregation. Expose the cells to enzymes for a minimal am
Dephosphorylation－of－DNA
De-phosphorylation of DNAThe preferred method of de-phosphorylation uses the buffer system described by Pharmacia for most of their restriction endonu
Basic－procedures－for－bacteria－culture1
A. Phenol extraction of DNA samplesPhenol extraction is a common technique used to purify a DNA sample (1). Typically, an equal volume of TE-saturated
Isolation－and－Transcription－Profiling－of－Purified－Uncultured－Human－Strom...
Isolation and Transcription Profiling of Purified Uncultured Human Stromal Stem CellsIsolation and Transcription Profiling of Purified Uncultured Huma