Ibicuruzwa

Buffer biologique ni ibintu kama bifite ingaruka zidafite aho zibogamiye kuri ion ya hydrogen.Muri ubu buryo, buffer biologiya ifasha kubungabunga umubiri kuri pH neza kugirango inzira ya biohimiki ikomeze gukora neza.

Buffers nyinshi zigizwe na acide idakomeye nifatizo ridakomeye.Bafasha kubungabunga pH yatanzwe na nyuma yo kongeramo aside cyangwa base.Kurugero, amaraso arimo aside ya karubone (H2CO3) -bicarbonate (HCO3-) sisitemu ya buffer.Muri ubu buryo, aside idakomeye itandukana ku rugero ruto, itanga ion ya bicarbonate.Izi ion zirashobora guhambira H + ion zireremba mumaraso.Ibi bivugurura acide idakomeye kandi bigabanya ingano ya H + ion mugisubizo.

Ibinyabuzima byangiza ibinyabuzima birashobora kandi kuba sisitemu zifasha kubungabunga pH ihamye hafi ya pH yumubiri.Mugihe ukora ubushakashatsi hamwe nibice bigize selile cyangwa proteine ​​kugiti cye, abahanga bagomba kuzirikana buffer bakoresha.Hatari buffer nziza, ibikorwa byibice bashaka kwiga birashobora kugabanuka.

Buffers ni imiti ifasha isukari irwanya guhindura imiterere ya acide mugihe iyindi miti yongewemo isanzwe itera impinduka murimiterere.Buffers ningirakamaro kuri selile nzima.Ibi ni ukubera ko buffers zigumana pH iburyo bwamazi. PH niki?Ni igipimo cyukuntu aside irike.Kurugero, umutobe windimu ufite pH nkeya ya 2 kugeza kuri 3 kandi ni acide cyane - niko umutobe uri munda yawe usenya ibiryo.Kubera ko aside irike ishobora gusenya poroteyine, kandi selile zuzuye za poroteyine, selile zigomba kugira buffer imbere no hanze yazo kugirango zirinde imashini za poroteyine.PH imbere muri selile igera kuri 7, ifatwa nkutabogamye nkamazi meza.