Zogulitsa

Biological buffer ndi chinthu cha organic chomwe chimakhala ndi ma ion a haidrojeni.Mwanjira iyi, chitetezo chachilengedwe chimathandizira kuti thupi likhale pa pH yoyenera kuti njira zama biochemical zipitirire kuyenda bwino.

Ma buffers ambiri amakhala ndi asidi ofooka komanso maziko ofooka.Amathandizira kukhala ndi pH yopatsidwa ngakhale atawonjezera asidi kapena maziko.Mwachitsanzo, magazi amakhala ndi carbonic acid (H2CO3) -bicarbonate (HCO3-) system buffer system.M'dongosolo lino, asidi ofooka amasiyanitsidwa pang'ono, kupereka ma ion bicarbonate.Ma ion awa amatha kumanga ma H + owonjezera omwe akuyandama m'magazi.Izi zimasintha asidi ofooka ndikuchepetsa kuchuluka kwa ma H + ions mu yankho.

Ma biological buffers amathanso kukhala ma buffer machitidwe omwe amathandizira kuti pH ikhale yokhazikika mozungulira pH ya thupi.Poyesa ndi zigawo za maselo kapena mapuloteni pawokha, asayansi ayenera kuganizira zachitetezo chomwe amagwiritsa ntchito.Popanda chitetezo chabwino, ntchito ya gawo lomwe akufuna kuphunzira ikhoza kuchepa.

Ma buffers ndi mankhwala omwe amathandizira kuti madzi asasinthe ma acid ake akawonjezeredwa mankhwala ena omwe nthawi zambiri amayambitsa kusintha kwa zinthuzi.Ma buffers ndi ofunikira pama cell amoyo.Izi zili choncho chifukwa ma buffers amasunga pH yoyenera yamadzimadzi.Kodi pH ndi chiyani?Ndilo muyeso wa momwe madzi aliri acidic.Mwachitsanzo, madzi a mandimu ali ndi pH yotsika ya 2 mpaka 3 ndipo ndi acidic kwambiri - momwemonso madzi a m'mimba mwanu omwe amaswa chakudya.Popeza zakumwa za acidic zimatha kuwononga mapuloteni, ndipo maselo amakhala odzaza ndi mapuloteni, maselo amafunika kukhala ndi zotchingira mkati ndi kunja kwake kuti ateteze makina awo omanga thupi.PH mkati mwa selo ndi pafupifupi 7, yomwe imatengedwa kuti ndi yopanda ndale ngati madzi oyera.