字幕列表 影片播放 列印英文字幕 welcome to a new era of interactive learning lab experiences that mirror traditional campus laps in the convenience of your home just like in the campus laboratory you must follow important safety procedures before during and after experimentation follow these instructions and u too will have a safe and effective learning experience you'll notice micro scale techniques very small quantities of chemicals that contributed to the safety of the experience so make sure you read all the safety sections before starting your lab activities your instructor may have you fill out sign and send in the safety assessment specific safety directions are also listed at the beginning of each experiment in your lab manual this video details the safety protocols you need to understand and employment in order to conduct scientific experiments at home in addition you will learn how the safety information and procedures you performed working independently compare to those safety guidelines procedures and equipment you would use in campus laboratory just like any campus lab there are three phases of laboratory safety measures for the at home work preparation experiment and clean up each phase has unique safety considerations the concepts and procedures will differ somewhat working at home compared to a campus lab but the objectives are always the same at home you are responsible for all safety procedures your preparation taking proper precautions and just good common sense will ensure your safety set yourself to observation mode we're initializing the safety training procedure now let's go the prep phase of your at home lab work requires gathering organizing and preparing all of the materials you will need for your experiment here are the steps before starting each experiment read all information and instructions review the related material safety data sheets an m_s_d_s_ for chemicals used complete the emergency contact card simply set it near your telephone whether at home or in a campus lab prepare yourself to do lab activities wearing proper clothing tying back care and removing dangling jewelry make sure to wash your hands carefully before and after handling laboratory materials and where the safety gear most people find your kitchen the most convenient place to work but garage or study can also work your workspace doors should be close and preferably locked keep any pets and kids away from your work area and don't leave an experiment in progress unattended unless it is in a locked and secure room and never leave a flame or heat experiment unattended in addition no eating drinking cooking or smoking while you're doing your work here are key factors to incorporate your workspace protects your work table or surface by covering it with plastic sheeting or a white garbage bag and open window or stove exhaust fan are adequate to provide proper ventilation certain chemicals have noxious fumes they can be dangerous if inhaled in sufficient quantities and flammable vapors can become explosive if allowed to accumulate enclosed space have some water available either resting bottled water or a bathroom shower nearby and i campus lap you'll find a safety shower and i've watched stations should you ever splash or stock chemicals on yourself or a fire starts this is highly unlikely to happen since the micro scale quantities provided are too small for major reactions for experiments using chemicals keep a bag of sand or kitty litter on hand to absorb and contain any chemical spills keep sodium bicarbonate baking soda on hand to neutralize spilled assets before attempting to wipe them out concentrated acids can cause serious burns so neutralized then before cleanup to help to prevent a painful injury it's also a good idea to have a first aid kit handy if you have a fire extinguisher know where it is in your home take precautions and don't be careless when working with an open flame examined glassware for any chips or breaks and it found discard immediately pay attention when heating items don't touch with their hands to avoid burns some physics and geology experiments can involve the safety hazards of moving objects so always have ample room to conduct these types of experiments you might want to tell other people in your household activities to ensure everyone's safety now do you understand that critical safety measures involved in the prep phase you are ready to move on to the most exciting and fun part the experiment don't let your guard down though safety precautions must be followed throughout all phases of your learning experiences awareness is your ultimate weapon again safety hazards accidents and emergencies during your experience you need to be aware of things that can happen so that you can prevent mishaps react quickly if problems arise should an accident occurred the big boom a full-scale chemical quantities in the laboratory is a small poof in your home environment at home or in a lab always where the appropriate personal safety gear for the experiment you are doing here is more detailed information about chemicals to keep in mind as you conduct your statement some chemicals can be corrosive flammable and generally hazardous red-hot all labels carefully and follow instructions precisely use only the amounts of chemicals needed for your experiment never refill used chemical containers use chemicals may be contaminated and you could end up with and unexpected and potentially unpleasant reaction some of the chemicals included are solvents most solvents are highly flammable and should never be exposed to an open flame examples are alcohols toluene ethers acetone and ethyl acetate certain chemicals produced toxic fumes that can be dangerous if inhaled never directly sniff a chemical instead waft the vapors towards your nose with your hand assets are chemicals that can cause severe burns some handle them with care never add water directly to a concentrated acid this generates heat and can cause dangerous splattering that is similar to what happens when you add water to hot oil the proper way to make some acids with water is to follow the a_a_ rule add acid you should slowly add acid to water while stirring the water with the glass rod never the other way around in addition to caution with chemicals remain away of fire hazards open flames heated objects and burners can pose serious safety threats during experiment here are some tips to keep in mind never leave and open flame unattended it only takes seconds for loose clothing or other items to catch fire on a similar note always extinguish heat sources when not in use test metal and glass objects for heat prior to handling in order to avoid parents and be careful to only eat objects that are designed to be heated certain class objects such as graduated cylinders and flasks are not going to be heated and can shatter when exposed to a heat source is a glass objects shatters or breaks don't risk a cut by picking up the glass with your hands instead sweep the broken pieces into a dust pan carefully dispose of them immediately if a burn occurs cold running water is the best treatment followed by medical attention if necessary there are important safety concerns to keep in mind if you are performing biology experiments that include dissections follow proper cutting and dissection procedures slip of the sharp scalpel can cause a laceration never cut items while holding them in your hand and always cut away from the direction of your body now you know what to be aware of all performing experiments you're ready to get started finishing the experiment does not signal the end of your lab safety protocol it signals the beginning of your final phase cleanup during the cleanup dispose of all chemicals and dissection specimens appropriately used an unwanted my microscale chemicals can be flushed down the toilet or sink and non-chemical items can be disposed of in the trash wrap dissection specimens in newspaper and seal in plastic prior to placing the trash wash your work surface and all laboratory equipment with dish detergent and warm water rinse equipment with distilled water and air dry glass objects clean pipettes by drying up expelling distilled water several times then while squeezing the bulb forcefully swing them in a downward arc double-check that all materials have been properly cleaned and put away store your lap out of reach of children and pets congratulations you have successfully completed the safety training video that before you go please keep in mind one final word of caution that is just for female students if you are pregnant or plan to become pregnant seek your doctor's advice prior to performing the experiments certain experiments may involve chemicals that can pose a risk to your unborn baby your doctor can tell you if it is safe to complete all of the experiments required for your course if you have any further questions regarding the important safety measures required in using your lab discuss them with your instructor or contact hands-on labs incorporated thank you for watching
B1 中級 美國腔 實踐實驗室安全視頻 (Hands-On Labs Safety Video) 78 4 kuoyumei 發佈於 2021 年 01 月 14 日 更多分享 分享 收藏 回報 影片單字