Video: Cov kab mob me me loj hlob zoo tshaj plaws ntawm qhov kub li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Kab mob loj hlob ceev tshaj plaws nyob rau hauv qhov ntau ntawm kub nruab nrab ntawm 40 ° F thiab 140 ° F, (4.4 ° C-60 ° C) ua ob npaug hauv tsawg li 20 feeb. Qhov ntau ntawm kub feem ntau hu ua "Danger Zone." Txhawm rau kawm paub ntau ntxiv txog "Thaj Chaw Muaj Kev Nyab Xeeb" mus ntsib Food Safety and Inspection Service qhov tseeb daim ntawv hu ua Danger Zone.
Kuj paub, qhov kub dab tsi microbes loj hlob zoo tshaj plaws hauv?
Mesophile yog ib yam kab mob uas loj hlob tuaj zoo tshaj plaws hauv nruab nrab kub , tsis kub lossis txias dhau, feem ntau ntawm 20 thiab 45 ° C (68 thiab 113 ° F). Lub sij hawm feem ntau yog siv rau cov kab mob me me . Txhua tus kab mob muaj lawv tus kheej qhov zoo ib puag ncig ib puag ncig thiab kub uas lawv vam meej tshaj plaws.
Qhov thib ob, Qhov ntsuas kub li cas Psychrophiles loj hlob zoo tshaj? Psychrophiles loj hlob zoo tshaj plaws hauv qhov ntsuas kub ntawm 0– 15 ° C . hos psychrotrophs vam meej ntawm 4 ° C thiab 25 ° C. Mesophiles loj hlob zoo tshaj plaws ntawm qhov kub nruab nrab hauv qhov ntau ntawm 20 ° C qhov chaw txog li 45 ° C. Cov kab mob feem ntau yog mesophiles. Thermophiles thiab hyperthemophiles raug yoog rau lub neej ntawm qhov kub siab tshaj 50 ° C.
Los ntawm qhov ntawd, qhov kub thiab txias cuam tshuam li cas rau kev loj hlob ntawm cov kab mob?
Yam Lub Cev uas Tswj Kev Loj Hlob Microbial . Feem ntau, nce hauv kub yuav nce kev ua haujlwm ntawm enzyme. Tab sis yog kub nce siab dhau, kev ua haujlwm ntawm enzyme yuav ploj zuj zus thiab cov protein (cov enzyme) yuav tsis lees paub. Ntawm qhov tod tes, txo qis kub yuav txo qis kev ua haujlwm ntawm enzyme.
Puas yog qhov pom kev loj hlob kub nyob ze rau qhov tsawg kawg lossis qhov kub tshaj plaws uas lub cev tuaj yeem loj hlob thiab yog vim li cas?
Cov kab mob me me ua pab pawg muaj peev xwm ua tau loj hlob hla ntau yam ntawm kub , los ntawm ib puag ncig khov mus rau saum qhov kub npau. Rau ib qho kab mob , cov yam tsawg kawg nkaus thiab kub tshaj plaws kev loj hlob txheeb xyuas qhov ntau yam uas kev loj hlob yog ua tau; Qhov no feem ntau yog li 25-30 ° C.
Pom zoo:
Qhov twg yog tus kab mob sib deev ntau tshaj plaws uas yog tshwm sim los ntawm cov kab mob thiab qee zaum ua rau mob tso zis hauv tus txiv neej?
Epididymitis feem ntau tshwm sim los ntawm kev kis kab mob, suav nrog kev sib deev sib kis (STIs), xws li tus kab mob gonorrhea lossis chlamydia
Lub koom haum ntawm cov leeg pob txha los ntawm qhov tsawg tshaj plaws mus rau qhov loj tshaj plaws yog dab tsi?
Skeletal thiab cardiac nqaij fibers. Npaj cov leeg hauv qab no los ntawm qhov tsawg tshaj plaws mus rau qhov loj tshaj plaws: nqaij fiber ntau, fascicle, myofibril, filament, nqaij. Npaj cov nqaij mos sib txuas hauv qab no los ntawm qhov tsawg tshaj plaws mus rau qhov loj tshaj: epimysium, perimysium, fascia, endomysium. cov sarcomere
Dab tsi yog qhov kub zoo tshaj plaws rau kev loj hlob ntawm cov kab mob lom zaub mov?
Yam uas cuam tshuam rau kev loj hlob ntawm cov kab mob suav nrog: Sijhawm - nyob rau hauv cov xwm txheej zoo, ib tus kab mob tuaj yeem sib kis tau ntau dua ob lab hauv xya teev. Kub - Cov kab mob lom zaub mov loj hlob zoo tshaj ntawm qhov kub ntawm 5 ° C txog 60 ° C. Qhov no raug xa mus ua 'thaj chaw phom sij txaus ntshai'
Dab tsi yog qhov kub zoo tshaj rau cov zaub mov lom cov kab mob loj tuaj ntawm?
Cov yam tseem ceeb uas cuam tshuam rau kev loj hlob ntawm cov kab mob muaj xws li: Lub Sij Hawm - nyob rau hauv cov xwm txheej zoo, ib tus kab mob tuaj yeem ua rau ntau tshaj ob lab hauv xya teev. Kub - Cov kab mob lom zaub mov loj hlob zoo tshaj ntawm qhov kub ntawm 5 ° C txog 60 ° C. Qhov no raug xa mus ua 'thaj chaw phom sij txaus ntshai'
Dab tsi yog Qhov Zoo Tshaj Plaws rau kev loj hlob ntawm microbes?
Txhawm rau kom loj hlob zoo, cov kab mob yuav tsum muaj cov dej thiab ntau lwm yam khoom xws li cov ntxhia pob zeb, cov khoom loj hlob, thiab cov pa roj, xws li oxygen. Txhua yam tshuaj lom neeg hauv cov kab mob muaj cov pa roj carbon monoxide, txawm tias lawv yog cov protein, rog, carbohydrates, lossis lipids