Thaum Simmons Citrate agar yog inoculated nrog Salmonella typhimurium, qhov nruab nrab tig Royal blue. Qhov no yog qhov txiaj ntsig zoo rau kev kuaj citrate. Thaum Simmons Citrate agar yog inoculated nrog Escherichia coli, qhov nruab nrab tseem ntsuab. Qhov no yog qhov tshwm sim tsis zoo rau qhov ntsuas citrate.
Simmons citrate agar yog xim dab tsi?
Qhov nce hauv pH ces ua rau cov xim hloov ntawm bromothymol xiav qhia, tig xiav. Nyob rau hauv nruab nrab tej yam kev mob qhov nruab nrab tseem yog ib tug ntsuab xim. Kev hloov xim rau xiav yog qhov tseem ceeb vim tias kev loj hlob ntawm Simmons 'citrate agar feem ntau txwv thiab yuav nyuaj rau saib yog tias nws tsis yog rau xim hloov.
Koj tuaj yeem qhia tau li cas yog qhov ntsuas citrate zoo?
Kev Pom Zoo: Loj hlob nrog cov xim hloov ntawm ntsuab mus rau xim xiav raws qhov slant. Piv txwv li: Salmonella, Edwardsiella, Citrobacter, Klebsiella, Enterobacter, Serratia, Providencia, thiab lwm yam Tsis zoo tshwm sim: Tsis muaj kev loj hlob thiab tsis muaj xim hloov; Slant tseem ntsuab.
txhais li cas kom tau txais txiaj ntsig zoo ntawm Simmons citrate test?
Kev loj hlob zoo (piv txwv li citrate siv) tsim cov tshuaj tiv thaiv alkaline thiab hloov cov xim ntawm nruab nrab ntawm ntsuabrau ci xiav.
Cov txiaj ntsig zoo qhia tau dab tsi hauv daim ntawv xeem citrate?
Qhov txiaj ntsig zoo yog xim hloov ntawm ntsuab rau xiav thiab / lossis kev loj hlob. Qhov no txhais tau hais tias citrate yog siv. Cov kab mob ntawdsiv citrate hloov cov ammonium uas alkalizes agar. Yog li cov xim xim hloov ntawm pH ntawm 6.9 mus rau 7.6 (acidic rau alkaline) thiab cov xim ntsuab qhia tias pH nce los ntawm nws cov xim hloov mus rau xiav.
