吸附色谱法常叫做液-固色谱法(Liquid-Solid Chromatography,简称LSC),它是基于在溶质和用作固定固体吸附剂上的固定活性位点之间的相互作用。可以将吸附剂装填于柱中、覆盖于板上、或浸渍于多孔滤纸中。吸附剂是具有大表面积的活性多孔固体,例如硅胶、氧化铝和活性炭等。活性点位例如硅胶的表面硅烷醇,一般与待分离化合物的极性官能团相互作用。分子的非极性部分(例如烃)对分离只有较小影响 ...
一、基本理论(一)原理 在生物体内,许多大分子AKSJDHFKLSDFHKLSDJ具有与某些相对应的专一分子可逆结合的特性。例如抗原和抗体、酶和底物及辅酶、激素和受体、RNA和其互补的DNA等,都具有这种特性。生物分子之间这种特异的结合能力称为亲和力,根据生物分子间亲和吸附和解离的原理,建立起来的色谱法称亲色谱法。亲和色谱中两个进行专一结合的分子互称对方为配基。如抗原和抗体,抗原可认为是抗体的配 ...
Martin 和 Synge在1941年就提出高效相色谱的设想,然而直到六十年代后期,由于各种技术的发展,高效液相色谱才付诸实现。这种色谱技术曾被称为高速液相色谱(HighSpeed Liquid Chromatography),高压液相色谱(High Parss-ure Lipuid Chromatography),目前使用最多的名称是高效液相色谱(High Pe-rformance Liaui ...
人类白细胞分化抗原协作组会议(HLDA)从1982年起至1996年已召开6届。第一届会议时命名的CD有CD1- CD15。到第六届会议时增加至CD1- CD166(其中CD110- CD113、CD118、CD129、CD133、CD159和CD160空缺)。关于CD的分组,第一届时只有T细胞(T),随着研究的扩大和深入,其后各届分组不断增加。1993年第五届时已有T细胞(T)、B细胞(B)、髓系 ...
以下是生物谷论坛中谷友的经验总结:http://bbs.bioon.com关键步骤是:1. 将小鼠固定好将尾巴拉直,绷紧,这是成功的第一步。小鼠性情较温顺,一般不会咬人,比较容易抓取固定。通常用右手提起小鼠尾巴将其放在鼠笼盖或其它粗糙表面上,在小鼠向前挣扎爬行时,用左手拇指和食指捏住其双耳及颈部皮肤,将小鼠置于左手掌心、无名指和小指夹其背部皮肤和尾部,即可将小鼠完全固定。在一些特殊的实验中,如进行 ...
仪器中文名称 仪器英文名称 英文缩写 原子发射光谱仪 Atomic Emission Spectrometer&
Units1 mg = 10-3 g1 ug = 10-6 g1 ng = 10-9 g1 pg = 10-12 g 1 kb of double stranded DNA = 660 kD 1 kb of single stranded DNA = 330 kD 1 kb of single stranded RNA = 340 kD Average MW of a deoxynucleoti ...
Sequence - Evolution - FunctionComputational Approaches in Comparative Genomics by Eugene V. Koonin National Center for Biotechnology Information Bethesda MD USA Michael Y. Galperin National Center f ...
众所周知,科研工作者在进行医药方面的科学研究之前,需要制定完善的统计研究设计方案,那么什么样的设计方案才称得上是完善的呢? 一般来说,完善的设计方案需具备以下几个条件:实验所需的人力、物力和时间资源;实验设计的“三要素”和“六原则”均符合专业和统计学要求,对实验数据的收集、整理、分析等有一套规范的规定和正确的方法。而其中准确把握统计研究设计的“三要素和六原则”,是科学实验设计的核心。 一、 ...
Scissors and Hemostats:The thumb and ring finger are inserted into the rings of the scissors while the index and middle finger are used to guide the instrument.The instrument should remain at the tips ...
Classification by type of pointsAll types of scissors can have blunt or sharp blades (A: Sharp:Sharp B: Blunt:Blunt). All types can have either straight or curved blades相关产品链接耗材库 常用耗材金属制品(剪刀等)仪器库 实验 ...
Forceps: consist of two tines held together at one end with a spring device that holds the tines open. Forceps can be either tissue or dressing forceps. Dressing forceps have smooth or smoothly serrat ...
Hemostatic forceps: Hinged (locking) Forceps. Many hemostatic forceps bear the name of the designer (Kelly Holstead Crile). They are used to clamp and hold blood vessels.Classification by size and sha ...
Needle holder: Hinged (locking) instrument used to hold the needle while suturing tissue. Good quality is ensured with tungsten carbide inserts at the tip of the needle holder.Mayo-Hegar Heavy with m ...
SennBlades at each end. Blades can be blunt (delicate) or sharp (more traumatic used for fascia).HohmanLevers tissue away from bone during orthopedic procedures. 相关产品链接(生物谷)耗材库 常用耗材金属制品(剪刀等)仪器库 实验室常用 ...
WeitlanerEnds can be blunt or sharp.Has rake tips.Ratchet to hold tissue apart.Gelpi Has single point tips. Ratchet to hold tissue apart.相关产品链接(生物谷)耗材库 常用耗材金属制品(剪刀等)仪器库 实验室常用设备消毒/灭菌仪器库 实验室安全设备 超净工作台 ...
Towel clamps secure drapes to a patient's skin. They may also be used to hold tissue.Backhaus Towel Clamp Locking forceps with curved pointed tips. ...
Scissors and Hemostats:The thumb and ring finger are inserted into the rings of the scissors while the index and middle finger are used to guide the instrument.The instrument should remain at the tips ...
Steam Sterilization: AutoclavingAutoclaveAn autoclave is a self locking machine that sterilizes with steam under pressure.Sterilization is achieved by the high temperature that steam under pressure ca ...
Disposable Paper GownADVANTAGES:Paper gowns are resistant to wetting so they are less permeable to bacteria. They are preferred for wet bloody surgery (equine abdominal surgery).Donning a new gown for ...