久久久久久亚洲精品,SM调教室虐男受调教H打开腿,欧洲-级毛片内射八十老太婆,护士趴下光屁股翘臀被打的作文

您好,歡迎進(jìn)入上海力敏實(shí)業(yè)有限公司網(wǎng)站!
一鍵分享網(wǎng)站到:
您現(xiàn)在的位置:首頁(yè) >> 產(chǎn)品中心 >> 生化試劑、抗體、血清 >> 常規(guī)生化試劑 >> 43815sigmaDL-二硫蘇糖醇DL-Dithiothreitol

sigmaDL-二硫蘇糖醇DL-Dithiothreitol

  • 更新時(shí)間:  2023-07-24
  • 產(chǎn)品型號(hào):  43815
  • 簡(jiǎn)單描述
  • sigmaDL-二硫蘇糖醇DL-Dithiothreitol
    for molecular biology
    product line
    BioUltra
    ≥99.5% (RT)
    total impurities
    DNases, none detected
    RNases, none detected
    insoluble matter, passes filter t
詳細(xì)介紹

sigmaDL-二硫蘇糖醇DL-Dithiothreitol

CAS number: 3483-12-3
Product Description:
Appearance: White Powder
Molecular formula: C4H10O2S2
Melting Point: 42-43°C
Molecular weight: 154.1 g/mol
Solubility: 0.1 M in H2O, 20°C, complete, colorless
pH: 4.0-6.5 (0.1 M in H2O, 25°C)
This product is designated as BioChemika Ultra for Molecular Biology grade and is suitable for applications in the molecular biology, specially if high purity is required. It has been analyzed for low contaminating impurity and the absence of nucleases.
DTT is synthetic. A method of preparation has been described in J. Chem. Soc. 253 (1949)
DTT is an agent for reducing -S-S- to -SH. Redox potential: -0.33 volts at pH 7. DTT acts as a protective agent for -SH groups of other species in solution. In this reaction the DTT is oxidized to the cyclic disulfide, and thereby ensures the reduction of other disulfides in solution. The disulfide reduction is complete in minutes at pH 8. A specific and sensitive assay for disulfide groups is based on determination of resulting monothiols with DTNB (Fluka 43760).2
Applications:
It is used in buffers for isolation of RNA5 or buffers used for RT-PCR starting with mRNA6,7.
Precautions and Disclaimer:
For Laboratory Use Only. Not for drug, household or other uses.
Preparation Instructions:
The solubility of DTT has been tested by Fluka at 50 mg/ml in water, resulting in a clear colorless solution. It has been described as freely soluble in water, ethanol, acetone, ethylate, chloroform and ether.
Solutions oxidize relatively slowly in air.3 It is recommended to make solutions fresh daily. Recorded half-life (hours) of DTT solutions at various pH and temperatures are as follows:4
Conditions (all in 0.1 M KPO4 buffer)
Half life (Hours)
pH 6.5 at 20°C
40
pH 7.5 at 20°C
10
pH 8.5 at 20°C
1.4
pH 8.5 at 0°C
11
pH 8.5 at 40°C
0.2
pH 8.5 at 20°C +0.1 mM Cu2+
0.6
pH 8.5 at 20°C +0.1 mM EDTA
4
Storage/Stability:
Storage Temperature: 4°C
When stored as indicated, this product is stable for years.

 


上海力敏實(shí)業(yè)有限公司代理sigma產(chǎn)品,咨詢sigmaDL-二硫蘇糖醇DL-Dithiothreitol 詳細(xì)產(chǎn)品信息


留言框

  • 產(chǎn)品:

  • 您的單位:

  • 您的姓名:

  • 聯(lián)系電話:

  • 常用郵箱:

  • 省份:

  • 詳細(xì)地址:

  • 補(bǔ)充說(shuō)明:

  • 驗(yàn)證碼:

    請(qǐng)輸入計(jì)算結(jié)果(填寫阿拉伯?dāng)?shù)字),如:三加四=7
国产精品美女一区二区三区| 久久精品国产亚洲AV忘忧草18| 国产精品色情国产三级在| 4399理论片午午伦夜理片| 美女裸体啪啪到高潮无遮挡| 人妻丰满熟妇岳AV无码区HD| 国产伦精品一区二区三区| 9I精品福利一区二区三区蜜桃| 性少妇JEALOUSVUE成熟| 亚洲B2B网站| 老熟妇仑乱视频一区二区| 日本强好片久久久久久AAA| 帅气体育生GARY网站MV视频| 午夜精品一区二区三区在线观看| 欧美XXXXX高潮喷水麻豆| 亚洲国产精品美女久久久久AV| 男神插曲女生疼在线播放| 夜色暗涌时电视剧免费观看全集| 国产福利视频| 老人船上弄雨婷第12章视频| 免费B站推广网站| 国产精品毛片久久久久久久| 性做久久久久久| 亚洲AV无码乱码在线观看| 成人WWW污污污网站免费大全| 香蕉久久久久久AV成人| 亚洲中文无码| 一本色道婷婷久久欧美| 内射人妻无码色AB麻豆| 精品久久久久成人码免费动漫| 性生交大片免费看| 51精品少妇人妻AV一区二区| 成全视频在线观看在线播放高清| 辽宁少妇高潮45分钟| 老熟女BBW搡BBBB搡| 特级AAAAAAAAA毛片免费视频| 性XXXX欧美老妇胖老太| 成人性爱视频在线观看| 嫩模被强到高潮呻吟不断| 亚洲AV乱码一区二区三区林ゆな| 好吊色欧美一区二区三区视频|