MTT cell proliferation assay kit, 500 reactions. Kit Content: Solution A 5ml, Solution B 50ml. MTT Proliferation Assay Kit provides an easy to use tool for studying the induction and inhibition of cell proliferation in any in vitro model. This kit will also allow investigators to screen drug candidates involved in cell cycle regulation. In this assay, MTT is taken up by cells through the plasma membrane potential and then reduced to formazan by intracellular NAD(P)H-oxidoreductases.
MTT Cell Proliferation Assay Kit
Catalog Number:
CP-001, 1000 reactions
CP-002, 500 reactions
Introduction
The reduction of tetrazolium salts is now recognized as a safe, accurate alternative to radiometric testing.MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay, first described by Mosmann in 1983, is based on the ability of a mitochondrial dehydrogenase enzyme from viable cells to cleave the tetrazolium rings of the pale yellow MTT and form a dark blue formazan crystals which is largely impermeable to cell membranes, thus resulting in its accumulation within healthy cells. Solubilization of the cells by the addition of a detergent results in the liberation of the crystals which are solubilized.The number of surviving cells is directly proportional to the level of the formazan product created. The color can then be quantified using a simple colorimetric assay. The results can be read on a multi-well scanning spectrophotometer (ELISA reader).
Storage:
Upon receiving, Solution AMTT solution should be kept at-200C and protected from light.Store properly, the kit components should remain stable for 6 months.
Kit Contents:
1.Solution AMTT solution: 5ml ( 500 reactions), 10ml (1000 reactions)
2. Solution BCrystal dissolving solutions: 50ml ( 500 reactions), 100ml (1000 reactions)
Protocol
1. Plate cells in 96-well tissue culture plate at density of 2x105 per well in 100ul of culture medium.
2. 5 hours before the end of the incubation add 10ul of MTT solution from step one to each well containing cells.
3. Incubate the plate at 37ºC for 5 hours.
4. Remove media with needle and syringe.
5. Add 100ul of Solution B to each well and pipette up and down to dissolve crystals.
6. Transfer to plate reader and measure absorbance at 570nm.
Reference Mosmann T. Rapid colorimetric assay for cellular growth and survival: application to proliferation and cytotoxicity assays. J Immunol Methods. 1983 Dec 16;65(1-2):55-63.
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换算
1微升 = 0.000 000 001立方米
1微升 = 0.000 001 立方分米
1微升 = 0.000 001 升
1微升 = 0.001 毫升
1微升 = 0.001 立方厘米
1微升 = 1 立方毫米
1微升 = 1 000 纳升
如题,比如1000微升的枪,最大量程是1000,最大值要更大一些,一直用枪也没有注意过这个问题,记得原来上课老师讲是要调到最大量程,为了是弹簧处于松弛状态,那最大值应该才是最松弛状态吧,百度了一下也是有人说最大值,有人说最大量程,有人说没啥影响,想问问各位大神对这个小问题的理解,谢谢
移液器又称移液枪,是一种用于定量转移液体的器具,被广泛用于生物、化学等领域。
1.使用合适的吸头:
为确保更好的准确性和精度,建议移液量在吸头的35%-100%量程范围内。
2.吸头的安装:
对于大多数品牌的移液器,特别是多道移液器,安装吸头并非易事:为追求良好的密封性,需要将移液套柄插入吸头后,左右转动或前后摇动用力上紧。也有人会用移液器反复撞击吸头来上紧,但这样操作会导致吸头变形而影响精度,严重的则会损坏移液器,所以应当避免出现这样的操作。RAININ(瑞宁)的多道移液器没有O型环,配合有前挡点的吸头,只需轻压一下即可达致理想密封,实在是多道移液器使用者的福音。
3.吸头浸入角度和深度:
吸头浸入角度控制在倾斜20度之内,保持竖直为佳;吸头浸入深度建议如下所示:
移液器规格
吸头浸入深度
2µL和10 µL
1 mm
20µL和100 µL
2-3 mm
200µL和1000 µL
3-6 mm
5000 µL和10 mL
6-10 mm
4.吸头润洗:
对常温样品,吸头润洗有助于提高准确性;但是对于高温或低温样品,吸头润洗反而降低操作准确性,请使用者特别注意。
5.吸液速度:
移液操作应保持平顺、合适的吸液速度;过快的吸液速度容易造成样品进入套柄,带来活塞和密封圈的损伤以及样品的交叉污染。
建议:
1、移液时保持正确的姿势;不要时刻紧握移液器,使用带指钩的移液器帮助缓解手部疲劳;有可能的话经常换手操作。
2、定期检查移液器的密封状况,一旦发现密封老化或出现漏液,须及时更换密封圈。
3、每年对移液器进行1-2次校正(视使用频率而定)。
4、绝大多数移液器,在使用前和使用一段时间后,要给活塞涂上一层润滑油以保持密封性;而对于RAININ常规量程的移液器,不涂润滑油也同样拥有理想的密封性。
如仍有疑问,欢迎向企业知道提问。
一、国产移液器我们以大龙移液器为例,它具有以下特点:
1. 重量轻,使用轻巧便捷,可减少手部疲劳。
2. 量程准确。
3. 量程具有锁定装置,符合人体手型和手感
4. 重量轻,使用轻巧便捷,可减少手部疲劳。
5. 具有可拆卸式高温高压消毒。
6. 产品规格齐全,共有16种。
二、进口移液器我们以德国艾本德移液器为例,它具有以下特点:
1. 符合ISO9000和GLP规定,用户可独立校准。
2. 十种规格,包括从0.1ul-5ml的体积变化,满足常规的需要,同时精度和误差较高。
3. 移液杆可360旋转,不用工具可卸下121℃高温灭菌。
4. 吸头接嘴有独特的V形圈,可以适合不同品牌的吸头。
5. 十种规格,包括从0.1ul-5ml的体积变化,满足常规的需要,同时精度和误差较高。
通过以上介绍,相信用户对这两种移液器的区别也有一定的了解了。

