Video: Phenol liab qhia dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Phenol Liab Broth yog ib lub hom phiaj sib txawv qhov nruab nrab feem ntau siv los sib txawv gram negative enteric kab mob. Nws muaj peptone, phenol liab (ib pH qhia), ib lub raj Durham, thiab ib qho carbohydrate. Phenol liab yog qhov ntsuas pH uas hloov daj hauv qab pH ntawm 6.8 thiab fuchsia saum pH ntawm 7.4.
Raws li, phenol liab siv rau dab tsi?
Phenol liab yog dej-soluble dye siv li pH qhia, hloov ntawm daj mus rau liab tshaj pH 6.6 mus rau 8.0, thiab tom qab ntawd tig xim liab liab saum pH 8.1. Yog li ntawd, phenol liab tuaj yeem yog siv li pH qhia dye nyob rau hauv ntau yam kev kuaj mob thiab cell biology kuaj.
Tom qab ntawd, lo lus nug yog, nws txhais li cas thaum phenol liab tig daj? Phenol liab yog pH qhov taw qhia uas yog daj ntawm pH hauv qab 6.8 thiab liab ntawm pH saum toj no 7.4 nrog sib txawv ntxoov los ntawm daj rau liab nruab nrab ntawm cov qib pH. Yog tias qhov ntsuas tau tig daj hauv lub raj mis no txhais tau tias Nws tau dhau los ua paug nrog qee yam uas ua rau pH ntau acidic thiab coj pH qis dua 6.8.
Hauv qhov no, dab tsi ua rau xim hloov hauv phenol liab?
Cov phenol liab hloov xim thaum koj tshuab rau nws, vim koj tab tom qhia cov pa roj carbon dioxide rau qhov sib tov. Phenol liab hloov kom daj nyob rau hauv pH qis dua 7, yog li qhov kev daws teeb meem tig daj yog qhov qhia txog acidic (qis dua 7 pH).
Puas yog phenol liab txaus ntshai?
Phenol Liab yog ob qho tib si corrosive thiab tshuaj lom. Qhov no txhais tau hais tias yog nws kov daim tawv nqaij nws tuaj yeem hlawv los ntawm nws thiab yog tias nqos nws tuaj yeem ua rau muaj teeb meem. Kev tuag tau tshwm sim yog tias nws nyob ntawm ntau dua 25% ntawm thaj chaw ntawm daim tawv nqaij lossis yog tias tsawg li 15 mL tau noj.
Pom zoo:
Vim li cas cov phenol liab tig liab?
Tshaj pH 8.2, phenol liab hloov xim liab (fuchsia) xim. thiab yog txiv kab ntxwv-liab. Yog tias pH nce ntxiv (pKa = 1.2), cov proton los ntawm pawg ketone ploj, ua rau daj, tsis zoo them ion denoted li HPS& rho tawm;
Cov xim ntawm phenol liab ntawm nruab nrab pH yog dab tsi?
Dab tsi yog xim ntawm phenol liab ntawm acid pH thiab ntawm alkaline pH? daj ntawm acid pH, ci liab ntawm alkaline pH. Phenol liab yog liab los yog txiv kab ntxwv nyob nruab nrab pH
Dab tsi xim yog phenol liab nyob rau hauv ib qho kev daws teeb meem?
Phenol liab yog cov kua qaub-puag qhia. Nws yog tsim los ntawm condensing ob moles ntawm phenol nrog ib tug mole ntawm o-sulfobenzoic acid anhydride. Phenol Liab yog siv los ua pH qhia hauv daim ntawv thov kab lis kev cai ntawm tes. Kev daws ntawm phenol liab yuav muaj xim daj ntawm pH ntawm 6.4 lossis qis dua thiab xim liab ntawm pH
Dab tsi xim yog phenol liab hauv cov kua qaub?
Phenol liab yog qhov ntsuas ph uas yuav yog txiv kab ntxwv ntawm. Phenol liab yog pH qhia tias yuav yog txiv kab ntxwv ntawm nruab nrab pH; daj nyob rau hauv acidic ib puag ncig thiab tsaus liab nyob rau hauv ib puag ncig yooj yim
Vim li cas cov kab mob Gram tsis zoo tshwm liab liab thaum cov kab mob Gram zoo pom ntshav liab?
Gram zoo hlwb stain ntshav vim lawv cov peptotidoglycan txheej yog tuab txaus, txhais tau tias tag nrho cov kab mob Gram zoo yuav khaws lawv cov stain. Gram tsis zoo hlwb stain liab vim lawv muaj ib tug nyias peptidoglycan phab ntsa, thiab lawv yuav tsis khaws ib yam ntawm cov ntshav stain los ntawm crystal violet