Video: Cov kab mob hauv qhov ncauj dab tsi metabolize sucrose tsim cov nplaum glucans thiab tsim cov quav hniav?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
GTF yog qhov tseem ceeb enzyme uas catalyzes qab zib rau nplaum glucans thiab koom tes tseem ceeb rau kev tsim ntawm hniav hniav nyob rau hauv uas tsub zuj zuj ntawm metabolic acids ua los ntawm kab mob cov cheeb tsam ua rau muaj kev tshem tawm hauv zos ntawm cov hniav txheej (Loesche, 1986).
Ib yam li ntawd, hom kab mob twg muaj nyob rau hauv cov quav hniav?
Cov kab mob sib kis no ua rau cov hniav thiab cov ntaub so ntswg sib kis mus rau qhov siab ntawm cov kab mob metabolites, uas ua rau muaj kab mob hniav. Cov kab mob tseem ceeb hauv cov quav hniav yog Streptococcus sanguis thiab Streptococcus mutans , ob qho tib si yog suav tias yog lub luag haujlwm rau cov quav hniav. Streptococcus mutans.
Ib qho ntxiv, S mutans metabolize qab zib li cas? S . mutans ua dextranase rau zom glucan (dextran) rau qabzib , uas ua tau Tom qab ntawd siv rau hauv glycolysis [18, 19, 20]. Tsis tas li ntawd, S . mutans tsim fructosyltransferases rau kev tsim cov fructose polymer hu ua fructan, yog dej-soluble polysaccharide.
Ib yam li ntawd, cov kab mob hauv qhov ncauj ua dab tsi?
Cov kab mob hauv tib neeg lub qhov ncauj hloov cov piam thaj, fructose, thiab feem ntau sucrose (cov suab thaj) rau hauv cov kua qaub xws li lactic kua qaub los ntawm cov txheej txheem glycolytic hu ua fermentation. Yog tias nyob rau hauv kev sib cuag nrog cov hniav, cov kua qaub no tuaj yeem ua rau demineralization, uas yog kev sib tawg ntawm nws ntxhia ntsiab lus.
Streptococcus mutans ua li cas rau cov hniav?
S. mutans zais Glucosyltransferase ntawm nws phab ntsa ntawm tes, uas tso cai rau cov kab mob tsim cov polysaccharides los ntawm sucrose. Cov nplaum polysaccharides no yog lub luag haujlwm rau cov kab mob muaj peev xwm los sib sau ua ke thiab ua raws li cov hniav enamel, i.e. tsim biofilms.
Pom zoo:
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