Qhov sib txawv tseem ceeb ntawm kev sib xyaw ua ke thiab cov tshuaj tiv thaiv tsis sib xws yog qhov kev sib txuas ua ke qhia lub zog hloov ntawm ib sab ntawm cov tshuaj tiv thaiv mus rau sab nraud qhov tsis sib xws tsis cuam tshuam nrog kev hloov hluav taws xob.
Feem ntau cov tshuaj tiv thaiv uas peb paub yog endergonic, uas txhais tau hais tias cov tshuaj tiv thaiv tsis tshwm sim. Yog li ntawd, Gibbs dawb lub zog ntawm cov tshuaj tiv thaiv no siab tshaj xoom. Cov tshuaj tiv thaiv no xav tau lub zog los ntawm ib puag ncig sab nraud kom tshwm sim cov tshuaj tiv thaiv. Yog li ntawd, peb tuaj yeem ua ke cov kev cuam tshuam no nrog cov tshuaj tiv thaiv exergonic cais uas "tsav" cov tshuaj tiv thaiv uas tsis yog tshwm sim. Ob qhov kev sib tw ua ke no feem ntau qhia cov xeev nruab nrab.
Yuav ua li cas sib cog lus?
Cov tshuaj tiv thaiv sib txuas yog cov tshuaj tiv thaiv tshuaj muaj zog nruab nrab rau cov txheej txheem hloov hluav taws xob. Hauv lwm lo lus, cov tshuaj tiv thaiv no tsim los ntawm kev sib xyaw ntawm ob qhov kev tawm tsam sib txawv uas muaj qhov sib txawv nruab nrab hauv lub xeev uas lub zog hloov pauv ntawm ib sab ntawm cov tshuaj tiv thaiv mus rau lwm qhov.
Feem ntau cov tshuaj tiv thaiv peb paub yog endergonic (non-spontaneous). Yog li ntawd, cov tshuaj tiv thaiv no yuav tsum muaj lub zog txaus rau cov tshuaj tiv thaiv tshwm sim. Rau lub hom phiaj no, cov tshuaj tiv thaiv tsis tshwm sim tuaj yeem ua ke nrog lwm cov tshuaj tiv thaiv uas tuaj yeem muab lub zog rau "tsav" cov tshuaj tiv thaiv tsis yog tshwm sim. Cov tshuaj tiv thaiv thawj zaug yog thermodynamically unfavorable, thiab tom qab cov txheej txheem coupling, nws ua thermodynamically favourable. Ob qhov kev cuam tshuam tau koom ua ke los ntawm lub xeev nruab nrab uas yog ib txwm muaj rau ob qho kev tawm tsam. Tom qab ntawd Gibbs lub zog rau txhua qhov kev tawm tsam ib nrab tuaj yeem suav tau los ua kom muaj zog Gibbs pub dawb rau kev sib koom ua ke.
Daim duab 01: Kev sib koom ua ke
Ib qho piv txwv ntawm kev sib koom ua ke yog qhov tsim ntawm ATP, uas yog cov txheej txheem endergonic, thiab nws tau ua ke rau kev tawg ntawm proton gradient.
Dab tsi yog Qhov Kev Sib Tham Tsis Txaus Siab?
Cov tshuaj tiv thaiv tsis sib xws yog cov tshuaj tiv thaiv uas tsis muaj lub xeev nruab nrab rau kev hloov hluav taws xob. Ib qho piv txwv rau cov tshuaj tiv thaiv tsis sib xws yog kev sib xyaw ua ke ntawm cov piam thaj thiab fructose los ua sucrose. Cov tshuaj tiv thaiv no yog thermodynamically tsis zoo vim nws xav tau lub zog siab.
Daim duab 02: Kev sib xyaw ntawm Glucose thiab Fructose los ua Sucrose
Txawm li cas los xij, yog tias peb ua ke cov tshuaj tiv thaiv no nrog ATP hydrolysis cov tshuaj tiv thaiv, tom qab ntawd cov tshuaj tiv thaiv yog ua tau thiab tshwm sim hauv ob kauj ruam uas muaj txiaj ntsig zoo, sib koom ua ke hauv lub xeev nruab nrab. Tom qab ntawd nws dhau los ua qhov kev sib tw ua ke.
Dab tsi yog qhov sib txawv ntawm kev sib koom ua ke thiab kev tsis sib haum xeeb?
Txhua yam tshuaj tiv thaiv uas peb paub tsis yog tshwm sim; Yog li ntawd, peb yuav tsum tau ua ke nrog lawv nrog qee qhov kev tawm tsam txhawm rau ua kom lawv vam meej. Yog li, hom tshuaj tiv thaiv tshiab no hu ua cov tshuaj tiv thaiv ua ke thaum yav dhau los cov tshuaj tiv thaiv uas tsis yog tshwm sim yog hu ua cov tshuaj tiv thaiv tsis sib xws. Qhov sib txawv tseem ceeb ntawm kev sib xyaw ua ke thiab cov tshuaj tiv thaiv tsis sib xws yog qhov kev sib txuam ua ke qhia tias lub zog hloov pauv ntawm ib sab ntawm cov tshuaj tiv thaiv mus rau lwm qhov, thaum cov tshuaj tiv thaiv tsis sib xws tsis muaj lub zog hloov mus rau qhov chaw.
Hauv qab infographic tabulates ntau qhov sib txawv ntawm kev sib txuas thiab cov tshuaj tiv thaiv tsis sib xws.
Summary – Coupled vs Uncoupled Reaction
Txhua yam tshuaj tiv thaiv uas peb paub tsis yog tshwm sim; Yog li ntawd, peb yuav tsum tau ua ke nrog lawv nrog qee qhov kev tawm tsam txhawm rau ua kom lawv vam meej. Hom tshuaj tiv thaiv tshiab no hu ua cov tshuaj tiv thaiv ua ke thaum yav dhau los cov tshuaj tiv thaiv uas tsis yog tshwm sim yog hu ua cov tshuaj tiv thaiv tsis sib xws. Qhov sib txawv tseem ceeb ntawm kev sib xyaw ua ke thiab cov tshuaj tiv thaiv tsis sib xws yog qhov kev sib txuam ua ke qhia tias lub zog hloov pauv ntawm ib sab ntawm cov tshuaj tiv thaiv mus rau lwm qhov, thaum cov tshuaj tiv thaiv tsis sib xws tsis muaj lub zog hloov mus rau qhov chaw.
