Video: Mr VP kua zaub yog dab tsi?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Methyl Liab ( MR ) thiab Voges-Proskauer ( VP ) kua zaub yog siv los ua ib feem ntawm cov IMViC kev ntsuas ua qhov nruab nrab uas ob qho kev ntsuas Methyl Red thiab Voges-Prosakuer tuaj yeem ua tau. Nws yog ib qho yooj yim kua zaub uas muaj peptone, buffers, thiab dextrose lossis qabzib.
Kuj nug tias, Mr VP broth test yog dab tsi?
Methyl Liab / Voges-Proskauer ( MR / VP ) Qhov no xeem yog siv los txiav txim seb txoj kev fermentation twg yog siv los siv cov piam thaj. Nyob rau hauv txoj kev sib xyaw acid fermentation, qabzib yog fermented thiab tsim ntau cov organic acids (lactic, acetic, succinic, thiab formic acids).
Tom qab ntawd, lo lus nug yog, kab mob puas tuaj yeem yog MR thiab VP zoo? Enterobacter hafnia thiab Proteus mirabilis yog cov piv txwv ntawm cov kab mob uas yog ob tug MR- thiab VP - zoo , txawm hais tias VP cov tshuaj tiv thaiv yuav raug ncua. Lub sijhawm incubation txog li 5 hnub yuav tsim nyog rau qhov kev sim tshuaj methyl liab thiab mus txog 10 hnub rau kev xeem Voges-Proskauer.
Hauv txoj kev no, qhov ntsuas VP zoo txhais li cas?
r/ lub VP yog a xeem siv los txheeb xyuas acetoin hauv kab lis kev cai kab mob. Cov xeem tau ua tiav los ntawm kev ntxiv alpha-naphthol thiab potassium hydroxide rau Voges-Proskauer broth uas tau txhaj tshuaj nrog cov kab mob. Ib cov xim liab liab qhia tias yog zoo tshwm sim, thaum xim daj-xim av qhia qhov tsis zoo.
Cov piam thaj twg nyob hauv MRVP broth?
MRVP kua zaub yog qhov nruab nrab nutrient nrog 0.5% qabzib ntxiv.
Pom zoo:
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