Do You Know All 17 Of The Most Toxic Reagents In The Lab（3-6）
2023-03-14
3. DEPCDEPC (diethylprocarbonate), which can inactivate various proteins, is a strong inhibitor of RNA enzyme. DEPC is a potential carcinogen. It should be performed in ventilated conditions and avoid contact with skin.DEPC is not very toxic, but inhalation is the most toxic, wear a mask when using. Wash away immediately. RNase AwayTM is an easy, inexpensive and non-toxic alternative to DEPC. Simply pour RNaseAwayTM directly onto the surface of glassware and plastic ware and rinse away with water after soaking. The RNase can be quickly removed from the surface of the ware without remaining and interfering with subsequent experiments.4. AcrylamideIt is a moderately toxic substance that can be absorbed through the skin and enter the human body through the respiratory tract. Therefore, you must wear protective equipment during handling and use, such as respirator suit, respirator mask and respirator gloves. The harm of acrylamide is mainly caused by the toxicity of god, but also reproductive, developmental toxicity.Neurotoxic effects are manifested by peripheral neurodegenerative changes and degenerative changes in parts of the brain involved in learning, memory and other cognitive functions. Tests have also shown that acrylamide is a possible carcinogen. Epidemiological observations in occupational exposed populations have shown that long-term low dose exposure to acrylamide can cause symptoms such as drowsiness, changes in mood and memory, hallucinations and tremors. Accompanied by peripheral neuropathy like a glove sensation, sweating, and muscle weakness. Cumulative toxicity, not easy to detox.Anyone who has any of the following can be listed as the object of observation for chronic acrylamide poisoning.a. The local skin exposed to acrylamide appears sweaty, damp and cold, peeling and erythema;b. Symptoms of extremity numbness, tingling, lower limb weakness, lethargy, etc.;c. Neuro-electromyography shows suspicious neurogenic lesion.5. Nn-methyl-diacrylamideToxic, affects the central nervous system, do not inhale the powder.6.DTTdithiothreitolA very strong reducing agent with an unpleasant odor. Can be hazardous to health by inhalation, ingestion or skin absorption. When using solid or high concentration storage solution, wear gloves and goggles and operate in a fume hood.
A Week To Learn Knowledge Of 100 Q | Hazardous Chemical Materials Safety Management(2)
2023-03-07
Q:What is dangerous production "four strictly prohibited"?Answer: It is strictly prohibited to change the production variety at will; It is strictly prohibited to change the technology at will;It is strictly prohibited to rush the construction period and surprise production; Risky operation is strictly prohibited.Q:What is the "three is the same"?Answer: No cross operation is allowed; Remove all combustible materials on site; All combustible gas content shall be detected.
Into Learning The Breathtaking Chemistry The Most Of The World
3. The latest heaviest elementCalifornia in January 1991, Lawrence livermore Moore national laboratory and dubna, Russia's nuclear scientists who study union college, that found the heaviest elements may be the world's newest ð « § 1 elements The element contains 114 protons and is said to be more stable than other superheavy atoms. The element is produced when calcium isotopes bombard neutron-rich plutonium isotopes.4. The most acidic solutionStrong acid and base solutions tend to have Ph values of 0 and 14 respectively, but it is far from sufficient to use this value as a standard for describing "strong acids". The strongest of the strong acids is the fluoric acid with 80% solution of antimony fluoride 5. The acidity of this acidic solution has not been determined, but even the slightly weaker solution of 50% solution is 1018 times more acidic than the concentrated sulfuric acid solution.
Do You Know All 17 Of The Most Toxic Reagents In The Lab（two）
EB: EB (Ethidium bromide, bromide)Ethidium bromide is a highly sensitive fluorescent stain used to observe DNA in agarose and polyacrylamide gels. Ethidium bromide The most common way to observe DNA in agarose gels is to stain them with the fluorescent dye ethidium bromide, which contains a tricyclic plane group that can be embedded between the DNA's accumulated bases. Ethidium bromide is a strong mutagenic agent with high carcinogenicity! It will evaporate at 60-70 ° C (so it is best not to add it when the glue is too hot, or it should be added to the liquid, 0.5ug/ml, dyeing for half an hour) (When excessive EB is added, the dyed gel can also be soaked in water at room temperature for 20min to reduce the background fluorescence caused by unbound EB).Purification treatment of ethidium bromide solution: Because ethidium bromide has certain toxicity, after the end of the experiment, the solution containing EB should be purified and disposed of to avoid environmental pollution and harm to human health.(1) For the solution with EB content greater than 0.5mg/ml, it can be treated as follows:① Dilute EB solution with water to a concentration less than 0.5mg/ml;② Add 0.5mol/L KMnO4, mix well, then add an equal amount of 25mol/L HCl, mix well, and leave at room temperature for several hours;③ Add 2.5mol/L NaOH of one time volume, mix well and discard.(2) The solution with EB content less than 0.5mg/ml can be treated as follows:①Add activated carbon at the dosage of 1mg/ml, shake and mix gently from time to time, and place at room temperature for 1 hour;② Filter with filter paper and seal the activated carbon with filter paper before discarding.
研究室で最も有毒な17の試薬をすべて知っていますか（1つ）
2023-03-06
1. DMSODMSO は広く使用されているジメチルスルホキシドです。アセチレン、芳香族、二酸化硫黄などのガスの溶剤、アクリル繊維の紡糸溶剤として使用されます。これは、水と有機溶媒の両方に溶解する重要な非プロトン性極性溶媒です。皮膚への透過性が高く、薬物が人体に浸透するのを助けます。農薬の添加剤としても使用できます。また、非常に重要な化学物質でもあります。DMSO は浸透圧保護剤でもあり、細胞の凝固点を下げ、氷の結晶の形成を減らし、細胞へのフリーラジカルによる損傷を減らし、電解質、薬物、毒物に対するバイオフィルムの透過性を変化させます。しかし、研究によると、DMSO はタンパク質の疎水基と相互作用し、タンパク質の変性、血管毒性、および肝腎毒性を引き起こす深刻な毒性があることが示されています。予備として1%～5%のアンモニア水を用意し、染色後は皮膚を多量の水で洗い、アンモニア水を薄めます。最も一般的なのは、吐き気、嘔吐、皮膚の発疹、皮膚のにんにく、玉ねぎ、カキのにおい、吐き出されたガスです.発疹や水ぶくれに。ジメチルスルホキシドは、水分を含んだ皮膚に触れると熱反応を起こします。毒性は知られていないため、有毒な原材料または物質を含むジメチルスルホキシド溶液との接触は避けてください。ジメチルスルホキシドは皮膚に浸透する可能性があり、特定の条件下では有毒物質が皮膚に置き換えられます。吸収：吸収のリスクは非常に低い.
100Qの知識を学ぶ日 |危険化学品安全管理(1)
Q:「3 つが同じ」とは何ですか? 回答: 交差操作は許可されません。現場のすべての可燃物を取り除きます。すべての可燃性ガスの含有量を検出する必要があります。
息をのむような化学を学ぶ世界の一番 (one)
Nanping Jianyang Xinsheng Trading Co.、LTD。 2023 年 2 月 20 日に福建省で公開された 1. 最大の科学機器は、スイスのジュネーブのシエルンにある周囲 27 km の大型陽電子 (LEP) 貯蔵リングです。リング自体は直径3.8メートル。 60,000 トンを超える科学機器がパイプラインと 8 つの作業ゾーンに収容されています。走査型トンネル顕微鏡プローブの先端は、世界最小の人工ピラミッドの最後の 3 つの層 (7 つの原子、3 つの原子、1 つの原子) を構成する単一の原子です。 1990 年 1 月、カリフォルニア州サンノゼにある IBM Almorden Research Center の科学者は、走査型トンネル顕微鏡を使用して、キセノンとニッケルの表面上の個々の原子を移動および再配置し、会社のイニシャルである IBM を綴ったことを発表しました。他のLABSは、他の元素の個々の原子でこれを行っています.
