SterileTechnique
Good sterile technique is the first and most important step in insuring consistent results when employing recombinant DNA and protein expression techniques. Sterile technique refers to procedures by which cultures may be manipulated without infecting the worker or contaminating the cultures or the laboratory environment.Because contaminating bacteria are ubiquitous and are found on fingertips, bench tops, etc., it is......阅读全文
In-vitroculture-of-early-chick-embryos
1. Use sterile technique. Prewarm Howard's Ringers in petri dish andagar/albumin culture dish to 37ºC.2. Crack 2-day egg into large sterile petri
基本无菌化技术3
PREPARATION OF THE ANIMALThe animals should be prepared in a n area separate from where surgery will be performed. Preparation is facilitated by first
免疫胶体金技术(Immune-colloidal-gold-technique)
(一) 原理 免疫胶体金技术是以胶体金作为示踪标志物应用于抗原抗体的一种新型的免疫标记技术。胶体金是由氯金酸(HAuCl4)在还原剂如白磷、抗坏血酸、枸橼酸钠、鞣酸等作用下,聚合成为特定大小的金颗粒,并由于静电作用成为一种稳定的胶体状态,称为胶体金。胶体金在弱碱环境下带负电荷,可与蛋白质分子的正电
免疫球蛋白提取技术(Immunoglobulin-isolation-technique)
免疫球蛋白(Immunoglobulin Ig)的含量代表着机体体液免疫的水平,并进一步代表着B细胞的功能,因此测定血清Ig含量可以推知机体的体液免疫功能和诊断某些疾病引起的Ig的过高和过低。 随着免疫学的发展和需要,免疫球蛋白的纯化和其成分的提纯成为必不可少的手段。纯化的方法很多,有单一法,但大多
Pheromone-Halo-Assay
-Use sterile technique and sterile solutions throughout this method.-1. Grow a starter culture at 30 C with shaking (250 rpm) until it reaches saturat
Streptomyces:Protocols/Spore-Prep
Spore Prep - Inoculating & HarvestingDescription A spore prep is a method of preserving a sporulating strain of Streptomyces. The stock is stored in 2
免疫球蛋白提取技术(Immunoglobulin-isolation-technique)2
九、蛋白定量技术 (一)双缩脲测定法 1.原理 蛋白质中的肽键有双缩脲反应,在碱性溶液中与二价铜离子形成蓝紫色的络合物,在一定的范围内,颜色的深浅与蛋白质的含量成正比。此法特异性强,游离的氨基酸、小肽和核酸均不产生这种反应,但此法不够敏感,仅能测出毫克水平。 2.试剂配制 硫酸铜(CuSO4·
免疫胶体金技术(Immune-colloidal-gold-technique)概述
(一) 原理 免疫胶体金技术是以胶体金作为示踪标志物应用于抗原抗体的一种新型的免疫标记技术。胶体金是由氯金酸(HAuCl4)在还原剂如白磷、抗坏血酸、枸橼酸钠、鞣酸等作用下,聚合成为特定大小的金颗粒,并由于静电作用成为一种稳定的胶体状态,称为胶体金。胶体金在弱碱环境下带负电荷,可与蛋白质分子的正
离心技术(centrifugation-technique)与离心机类型(1)
最大速度方法(1)移动界面超速离心法含几个组分的样品在足够高的离心场中离心时,每种颗粒都达到其最大沉降速度,这时样品开始分离。离心管的上层逐渐形成透明的上清液,并形成对应于样品各组分的一系列浓度界面,界面的移动相对于每种组分来说是特征的。虽然利用这种方法不一定能实现组分的纯化分离,但可以通过监测界面
离心技术(centrifugation-technique)与离心机类型(2)
离心机类型通常所使用的离心机根据转子转速大小的不同可分为普通离心机、高速离心机和超速离心机三类。(1)普通离心机一般来说,最大转速不超过6000r/min 者属普通离心机;如国产的80—1型,LXJ—Ⅱ型等。离心机转速与相对离心力的测算,如图2—37。普通离心机转子在室温下运转,转子室内的温度一般无
微载体培养技术(microcarrier-culture-technique)原理操作1
一、微载体培养应用此技术于1967年被用于动物细胞大规模培养。经过三十余年的发展,该技术目前已渐日趋完善和成熟,并广泛应用于生产疫苗、基因工程产品等。微载体培养是目前公认的最有发展前途的一种动物细胞大规模培养技术,其兼具悬浮培养和贴壁培养的优点,放大容易。目前微载体培养广泛用于培养各种类型细胞,生产
蛋白质印记技术(Westernblotting-technique)
一、 概 述 原理 Western-blotting印记是将蛋白质经分离后从凝胶转移到固相支持物上,然后用特异性的抗体进行检测。 二、 材料和方法 (一) 材料 1. 质粒 pW425t+SO7 2. 宿主菌菌株 E.coli X51,-86℃保存 3. 培养基 LB基本
微载体培养技术(microcarrier-culture-technique)原理操作2
5. 微载体培养操作要点 ●培养初期:保证培养基与微球体处于稳定的PH与温度水平,接种细胞(对数生长期,而非稳定期)至终体积1/3的培养液中,以增加细胞与微载体接触的机会。不同的微载体所用浓度及接种细胞密度是不同的。常使用2-3g/L的微载体含量,更高的微载体浓度需要控制环境或经常换液。 ●
免疫胶体金技术(Immune-colloidal-gold-technique)大总结
(一) 原理免疫胶体金技术是以胶体金作为示踪标志物应用于抗原 抗体的一种新型的免疫标记技术。胶体金是由氯金酸(HAuCl4)在还原剂如白磷、抗坏血酸、枸橼酸钠、鞣酸等作用下,聚合成为特定大小的金颗粒,并由于静电作用成为一种稳定的胶体状态,称为胶体金。胶体金在弱碱环境下带负电荷,可与蛋白质分子的正电荷
3RACE-PCR
实验概要 This technique is used to obtain the 3'end of a cDNA, it requires some sequence information internal to the mRNA under study. The
SDS-Whole-Cell-Extracts
-Use sterile technique and sterile solutions in steps 1 to 3.-1. Using a saturated starter culture, inoculate 25 to 30 ml of appropriate media in a 12
Guidelines-for-Aseptic-Rodent-Survival-Surgery
Introduction:Aseptic surgery is surgery performed without contamination or exposure to pathogens. These policies and guidelines are provided to help e
胶体金标记蛋白A技术(Protein-Agold-technique,-PAg法)2
(2)0、5mol/L,pH7.4 Tris-Hcl缓冲液:Tris,60.57g,1mol/L Hcl约420m1,调pH值至7.4,最后加双蒸水至1000m1,此为储备液。(3)0、05mo1/L Tris缓冲生理盐水:氯化钠8.5-9g;0.5mo1/L,pH7.4 Tris-Hcl缓冲液10
胶体金标记蛋白A技术(Protein-Agold-technique,-PAg法)1
PAg复合物制备方法简便,作为第二抗体,无种属特异性,可以免去不同种属动物要制备不同的特异性免疫球蛋白。PAg 复合物与包埋剂和细胞成分都极少发生非特异性的交互作用,蛋白A和金粒间非共价的结合特性既不影响蛋白A的活性,又能保持高度的稳定性,PAg复合物分子最小易于穿透组织。PAg复合物的原液在4
Transplantation-of-theeyeforming-region-of-Amphibian-neurula-into-theflank
EMBRYO CELL AND TISSUE CULTURE TECHNIQUESRearing solution: 10% Modified Steinberg's Solution. Operating solution:Full strength HBSt solution.Micro
Dropout-plates-for-yeast
Materials(Solutions are all available from the media room)200ml bottle of 2x SD200ml bottle of 4% agar -- make sure to sign it out40% glucoseCSM minus
Subculturing-Adherent-Cells
实验概要The following protocol describes a general procedure for subculturing adherent mammalian cells in culture.主要试剂1. Complete growth medium, pre-warme
TISSUE-CULTURE-ON-COVERSLIPS
I. Purpose:A. Skin tissue may be used for chromosome analysis in special cases when the results from peripheral blood are inconclusive, e.g. suspected
Green-Fluorescent-Protein-as-an-Indicator-ofTransfection-in-Chicken-Embryos
Green fluorescent protein (GFP) is responsible for the bioluminescence of the Pacific Northwest jellyfish, Aequorea victoria. In A.victoria, the 27-kD
CORE-SAMPLE-PCR:-A-method-to-rePCR-unique-bands-from-products-of-mixed-s
INTRODUCTIONThe products of a PCR reaction - especially when this is done on eukaryotic genomic DNA, and when using degenerate primers - often contain
Experimental-Surgery2
Use of Expired MaterialsExpired medical materials such as drugs, fluids and sutures may not be used on any research animal who is unanesthetized or wh
CORE-SAMPLE-PCR
A method to re-PCR unique bands from products of mixed sizeContentsINTRODUCTIONPROTOCOLCOMMENTSINTRODUCTIONThe products of a PCR reaction - especially
SOLID-TUMOR-CULTURES-FOR-CHROMOSOME-ANALYSIS
I. Purpose:A. Samples of solid tumors or lymph nodes may be sent from patients with cancer. These samples should be processed directly and also set up
Human-Embryonic-Stem-(ES)-Cell-Protocols——Matrigel-Aliquoting-and-Plating
Aliquoting Matrigel:Day one:Put the sterilized tip box (either 200 ml or 1000 ml tips), sterilized eppendorf tube container, and appropriate pipettor
Experimental-Surgery
General Issues and RequirementsSurgery is defined as any procedure that exposes tissues normally covered by skin or mucosa. Experimental surgery has