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

2023-03-07

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）

2023-03-07

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.

실험실에서 가장 독성이 강한 시약 17가지를 모두 알고 계십니까?

2023-03-06

1. DMSODMSO는 널리 사용되는 디메틸 설폭사이드입니다. 아세틸렌, 방향족, 이산화황 및 기타 가스의 용제 및 아크릴 섬유의 방사 용제로 사용됩니다. 물과 유기 용매 모두에 용해되는 중요한 비 양성자 성 극성 용매입니다. 피부투과율이 높아 약물의 인체 침투를 돕는다. 살충제의 첨가제로도 사용할 수 있습니다. 그것은 또한 매우 중요한 화학 물질입니다. DMSO는 세포의 어는점을 낮추고, 얼음 결정의 형성을 줄이고, 세포에 자유 라디칼 손상을 줄이고, 생물막의 투과성을 전해질, 약물, 독 및 그러나 DMSO는 단백질 소수성 그룹과 상호 작용하여 단백질 변성, 혈관 독성 및 간신 독성을 일으키는 심각한 독성 효과가 있다는 연구 결과가 있습니다. DMSO는 독성이 강한 물질이므로 사용할 때 휘발되지 않도록 해야 합니다. 1%-5% 암모니아수를 예비로 준비하고 피부를 염색한 후에는 많은 양의 물로 씻어내고 암모니아수를 희석해야 합니다. 가장 흔한 것은 메스꺼움, 구토, 피부 발진, 마늘, 양파, 굴 냄새가 피부와 내뿜는 가스입니다.흡입: 높은 휘발성 농도는 두통, 현기증 및 진정을 유발할 수 있습니다.피부: 눈에 보이는 것처럼 화상을 입을 수 있고 따끔거릴 수 있습니다. 발진과 물집. 디메틸 설폭사이드는 수분을 머금은 피부에 닿으면 열 반응을 일으킵니다. 독성 원료 또는 물질이 포함된 디메틸 설폭사이드 용액과의 접촉을 피하십시오. 독성이 알려지지 않았기 때문입니다. 그러나 디메틸 설폭사이드는 피부에 침투할 수 있으며 특정 조건에서 독성 물질을 피부로 대체합니다. 흡수: 흡수 위험은 매우 낮습니다.

100 Q 지식을 배우는 하루 | 유해화학물질 안전관리(1)

2023-03-06

Q:"3개는 동일하다"는 무엇입니까?답변:교차 작업이 허용되지 않습니다. 현장에서 모든 가연성 물질을 제거하십시오. 모든 가연성 가스 함량이 감지되어야 합니다.

숨이 멎을 듯한 화학 학습 속으로 세상에서 가장 (하나)

2023-03-06

난핑 Jianyang Xinsheng 무역 유한 공사. 20231년 2월 20일 푸젠에서 출판. 가장 큰 과학 장비는 둘레가 27km인 스위스 제네바 시에른에 위치한 LEP(Large Positron) 저장 고리입니다. 반지 자체의 직경은 3.8m입니다. 60,000톤 이상의 과학 장비가 파이프라인과 8개의 작업 구역에 보관되어 있습니다.2. 주사 터널링 현미경 프로브의 끝은 세계에서 가장 작은 인공 피라미드의 마지막 3개 층(7개 원자, 3개 원자 및 1개 원자)을 구성하는 단일 원자입니다. 1990년 1월, 캘리포니아 주 산호세에 있는 IBM Almorden 연구 센터의 과학자들은 주사 터널링 현미경을 사용하여 크세논과 니켈 표면의 개별 원자를 이동하고 재배열하여 회사의 이니셜을 IBM으로 표기했다고 발표했습니다. 다른 LABS는 다른 요소의 개별 원자로 이를 수행했습니다.