Nkhani

Zatsopano kapena zogwiritsidwa ntchito zamagalasi ziyenera kuviikidwa m'madzi kuti zifewetse ndi kusungunula zidazo. Zatsopano zamagalasi ziyenera kutsukidwa ndi madzi apampopi musanagwiritse ntchito, ndiyeno ziviikidwa usiku wonse ndi 5% hydrochloric acid; Magalasi omwe amagwiritsidwa ntchito nthawi zambiri amamangiriridwa ndi mapuloteni ambiri ndi mafuta, owuma pambuyo povuta kupukuta, choncho ayenera kumizidwa nthawi yomweyo m'madzi oyera kuti azitsuka.

1. Nkhani zofunika kuziganizira:

Pambuyo poyeretsa ndi kupha tizilombo toyambitsa matenda musanagwiritse ntchito, kaya mbale ya petri ndi yoyera kapena ayi imakhudza kwambiri ntchitoyo, imatha kukhudza ph ya chikhalidwe cha chikhalidwe, ngati pali mankhwala ena, idzalepheretsa kukula kwa mabakiteriya.

Zakudya za petri zomwe zangogulidwa kumene ziyenera kutsukidwa ndi madzi otentha poyamba, ndiyeno kumizidwa mu njira ya hydrochloric acid ndi gawo lalikulu la 1% kapena 2% kwa maola angapo kuti muchotse zinthu zamchere zaulere, kenako ndikutsuka ndi madzi osungunuka kawiri.

Ngati mukufuna mabakiteriya chikhalidwe, ndiye ntchito mkulu kuthamanga nthunzi (ambiri 6.8 * 10 5 Pa mkulu kuthamanga nthunzi), yotseketsa pa 120 ℃ kwa 30min, youma mu firiji, kapena youma kutentha yotsekereza yotseketsa, ndi kuika petri mbale mu uvuni. , kuwongolera kutentha pafupifupi 120 ℃ pansi pa chikhalidwe cha 2h, mukhoza kupha dzino la bakiteriya.

Zosakaniza za petri zitha kugwiritsidwa ntchito pobaya komanso chikhalidwe.

2. Gwiritsani ntchito njira:

Ikani botolo la reagent kuti ligwiritsidwe ntchito pamalo oyenera pamalo ogwirira ntchito, ndikumasula kapu ya botolo la reagent kuti ligwiritsidwe ntchito.

Ikani mbale za petri pakati pa malo anu ogwirira ntchito;

Chotsani kapu ya botolo la reagent ndi siphon the reagent ku botolo la reagent ndi pipette.

Ikani chivindikiro cha mbale ya petri kumbuyo kwake;

Lowani pang'onopang'ono chikhalidwe cha chikhalidwe mwachindunji m'munsi mwa mbali imodzi ya mbale;

Ikani chivindikiro pa mbale ya petri;

Ikani mbale pambali pake, samalani kuti musalole kuti sing'angayo ilowe mumpata waung'ono pakati pa chivindikiro ndi pansi;

Chotsani udzu womwe wagwiritsidwa ntchito.