国产精品久久久久久AV福利,日本丰满少妇XXXX,无码国产精品一区二区免费式影视,国产精品免费看久久久无码

您好,歡迎進入上海力敏實業(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 >> 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

  • 更新時間:  2023-07-24
  • 產(chǎn)品型號:  43815
  • 簡單描述
  • 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.

 


上海力敏實業(yè)有限公司代理sigma產(chǎn)品,咨詢sigmaDL-二硫蘇糖醇DL-Dithiothreitol 詳細產(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:

  • 詳細地址:

  • 補充說明:

  • 驗證碼:

    請輸入計算結(jié)果(填寫阿拉伯?dāng)?shù)字),如:三加四=7
校草喝下春药被男生玩弄| 熟妇熟女乱妇乱女网站| 无码人妻精品一区二区三区| 精品久久久久久久换人妻| 亚洲色大成www亚洲女子| 国产猛男gayb0y1069| 中文字幕久久熟女蜜桃| 天堂AV无码大芭蕉伊人AV| 国产亲妺妺乱的性视频| 娇妻当着我的面被4p| 亚洲日韩国产一区二区三区| 永久免费AV无码网站韩国毛片| 按摩硬进去做着做着软了| 全彩调教本子h里番全彩无码| 男人激烈吮乳吃奶视频免费| 日日碰狠狠添天天爽无码| 驯服人妻hd中字日本| 久久综合亚洲色HEZYO国产| 色情无码www视频无码区小黄鸭| 老妇bbw搡bbbb搡bbbb| www四虎最新成人永久网站| 国产精品无码久久av| 久久午夜羞羞影院免费观看| 岳打开双腿开始配合交换| 把腿张开开被添死去活来 | 无码专区一VA亚洲V专区在线| 免费看大片视频| 久久久国产精品免费a片分环卫| 亚洲一线产区和二线产区的区别| 日本特黄特色AAA大片免费| 少妇乱子伦精品无码| 老熟女av福利网址导航| 强行扒开双腿玩弄av调教视频| 无码专区AAAAAA免费视频| 美国zoom动物| 国产98色在线 | 日韩| 人体张悠雨全身光一丝不| 欧美精品久久久久a片18的试看| 亚洲一区二区三区写真| 久久夜色精品亚洲av三区| 国产YIN乱大巴MAGNET|