Cov txheej txheem:
Video: Koj yuav kuaj ntshav li cas hauv tsev?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Tiag tiag xeem rau lub xub ntiag ntawm ntshav siv hydrogen peroxide yog ib qho yooj yim. Nrog lub raj tshuaj tsuag, ua rau thaj tsam lossis cov khoom ntseeg tias muaj kab mob sib kis ntshav nrog "tshiab" hydrogen peroxide. Yog ntshav muaj nyob hauv qhov nchuav, nws fizzes. Qee leej neeg siv cov tshuaj hydrogen peroxide no qhuav cov quav los yog cov seem.
Kuj paub, koj yuav kuaj ntshav li cas?
Ib presumed ntshav cov qauv yog thawj zaug sau nrog tus swab. Ib qho poob ntawm phenolphthalein reagent tau ntxiv rau cov qauv, thiab tom qab ob peb feeb, ib qho poob ntawm hydrogen peroxide tau siv rau hauv swab. Yog hais tias lub swab tig liab sai, nws tau hais rau xeem presumptive positive rau ntshav.
Tsis tas li, phenolphthalein kuaj ntshav li cas? Phenolphthalein ( Ntshav ) Phenolphthalein yog qhov kev sim siab uas ua rau muaj kev cuam tshuam nrog heme molecule tam sim no hauv ntshav . Qhov tshuaj tiv thaiv zoo muab xim liab. Thaum zoo phenolphthalein cov tshuaj tiv thaiv yog qhia txog ntshav , nws tsuas yog kev sim siab xav thiab qhov ua tsis raug yog qhov ua tau.
Hais txog qhov no, ua li cas koj thiaj ua kom cov ntshav huv?
Yuav Ua Li Cas Thiaj Li Ntshav Hauv Ntau Yam Mob
- Thaiv tawm thaj tsam kom txog thaum ntxuav thiab tua kab mob tiav.
- Muab cov hnab looj tes pov tseg.
- So so qhov kom ntau li ntau tau nrog daim phuam ntawv lossis lwm yam khoom nqus tau.
- Maj mam ncuav cov tshuaj dawb - 1 feem tshuaj dawb rau 9 qhov dej - mus rau txhua qhov chaw muaj kab mob.
Puas yog hydrogen peroxide kuaj ntshav tau?
Cov Ntshav Hydrogen Peroxide Ntshav Kuaj Hydrogen peroxide , uas koj twb muaj hauv koj lub tsev lawm, tau siv los ua ib txoj hauv kev kuaj ntshav . Nco ntsoov tias hydrogen peroxide muaj nyob rau ntawm kev ua lag luam hauv ntau qhov sib txawv, feem ntau yog 3 feem pua thiab 6 feem pua.
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