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[万花筒] 【整理】2013-02-14&02-17 如何洗手最干净?洗手液-肥皂杀菌效果大对决

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[Homework]2013-02-14&02-17 如何洗手最干净?洗手液-肥皂杀菌效果大对决

in the season of flu and so many other gems we will told again and again hand sanitizers and soap are the best defence.last year american spent more than 170 million dollars oon hand sanitizers alone.so we wondered what was the best and how do the sanitizers compared with the show down with soap,well tonight our chief medical editor doctor //puts them to the tests and get some real answers.
clean? as many as 400 million gems perhand,that is how many bacteria travel with it every day.so you are the  university of maryland from cecu lab  six brave grad students are voluntarily  dust their hands in a toxic brew,thousands of ecoli bacteria,ye ecoli,ye we are a little odd about rubbing ecoli.to see what we take it off.
first up hand sanitizers we tested two kinds you will find in the store.one was 16% alcohol and one so called natural formula containing no alcohol.the key with hand sanitizers is to use enough of it your hands should take a full 15 seconds longer to dry.now let there air dry then we press our hands onto special incubation place ,growing in a remaining bacteria the result dramatic,those green spots are equal ibek crew from unwashed hand.after using hand sanitizers with 16 % alcohol formula with all the alcohol just look how many gems are left behind.alcohol based hand sanitizers work so much better because alcohol break the bacteria's protein and kills them.but iof you willing want to get clean what you best of all.guess what? it is your old friend soap so not only does it is well on bectria as the sanitizier it is gets more virius too.surprisingly study show regular and antibactieria soap are about equally effective.but how you use it is crucial.most of us only spend 5 second in the sink,just look how many gems remain.yek,go .you have to wash your hands for a full 20 seconds to really get the bugs off.and yes that singing happy birthday twice.so lets review it again.hands sanitizers are begain to get your sink look for one with at least 16 % alcohol watching with soap any kind is better,as long as you wash long enough.






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