Qhov sib txawv tseem ceeb ntawm cov dawb radicals thiab cov pa oxygen reactive yog tias cov dawb radicals tuaj yeem lossis tsis muaj cov pa oxygen atoms, hos hom pa oxygen reactive yeej tseem ceeb muaj oxygen atoms.
Peb feem ntau siv cov ntsiab lus dawb radicals thiab reactive oxygen hom interchangeably vim reactive oxygen hom yog ib txwm dawb radical tebchaw. Txawm li cas los xij, tsis yog tag nrho cov dawb radicals yog reactive oxygen hom; lawv yuav los yog tsis muaj oxygen atoms, tab sis lawv yog cov reactive heev vim muaj ib tug unpaired electron. Yog li ntawd, ob qho tib si cov ntaub ntawv no zoo li hnov mob nrog cov peev txheej tsim nyog kom tau txais ib qho hluav taws xob rau ob peb nrog lawv cov hluav taws xob tsis sib xws kom cov khoom siv hluav taws xob ruaj khov.
Dab tsi yog Dawb Radicals?
Dawb radicals yog reactive atoms los yog pab pawg ntawm atoms uas muaj ib los yog ntau dua unpaired electron(s). Lawv yog cov reactive heev vim muaj ib tug unpaired electron. Ntxiv mus, dawb radicals yog qhov tsis ruaj khov, thiab lawv zoo li ua kom ruaj ntseg los ntawm muab cov hluav taws xob sab nraud txhawm rau txhawm rau txhawm rau txhaws cov orbitals. Lawv hnov mob nrog lwm cov tshuaj sib xyaw kom ntes cov electron xav tau. Cov dawb radicals yog qhov tseem ceeb hauv cov txheej txheem ntuj tsim. Peb tuaj yeem txheeb xyuas cov dawb radicals los ntawm tus lej sau rau sab xis. Piv txwv li, H., Cl, HO, H3C
Daim duab 01: Hydroxyl Radical
Ntev-nyob dawb radicals yog nyob rau hauv peb pawg: ruaj khov radicals, pheej radicals, thiab di-radicals.
- Stable radicals: Cov piv txwv loj ntawm qhov ruaj khov radical yog molecular oxygen O2. Organic radicals uas muaj conjugated π system yuav nyob ntev.
- Tsis tu ncua radicals: Lawv nyob ntev vim muaj cov neeg coob coob nyob ib puag ncig ntawm qhov chaw radical thiab ua rau lawv lub cev nyuaj rau kev cuam tshuam nrog lwm cov molecule.
- Di-radicals: Qee cov molecules muaj ob lub chaw radical; peb npe lawv li di-radicals. Molecular oxygen lawm (atmospheric oxygen) tshwm sim raws li ib tug diradical.
Dab tsi yog Reactive Oxygen Hom
Reactive oxygen hom yog cov radicals uas muaj zog heev thiab muaj cov hluav taws xob tsis sib xws. Lub denotation rau lo lus no yog ROS. Cov hom tshuaj no tseem ceeb muaj cov pa oxygen atom uas muaj cov hluav taws xob tsis sib xws. Qee qhov piv txwv xws li peroxide, superoxide, hydroxyl radical, alpha oxygen, thiab lwm yam.
Daim duab 02: Tsim ROS Endogenously
Cov tshuaj lom neeg sib txawv ua rau cov pa oxygen reactive; Piv txwv li, txo cov molecular oxygen cov ntaub ntawv superoxide thiab cov pa oxygen reactive no ua tus precursor rau ntau lwm yam radical formations. Peroxides yog lwm yam tseem ceeb ROS uas tsim los ntawm dismutation ntawm superoxide.
Muaj txoj hauv kev endogenous thiab exogenous rau tsim ROS. Piv txwv li, reactive oxygen hom tsim nyob rau hauv ntau yam tshuaj lom neeg nyob rau hauv lub hlwb thiab organelles xws li peroxisomes. Exogenous zus tau tej cov ROS yog hais txog kev tsim cov reactive oxygen hom vim los ntawm kev cuam tshuam ntawm cov neeg sab nraud xws li cov pa phem, hnyav hlau, pa luam yeeb, tshuaj, thiab lwm yam.
Dab tsi yog qhov txawv ntawm Dawb Radicals thiab Reactive Oxygen Hom?
Peb feem ntau siv cov ntsiab lus dawb radicals thiab reactive oxygen hom interchangeably vim reactive oxygen hom yog ib txwm dawb radical tebchaw. Txawm li cas los xij, tsis yog tag nrho cov dawb radicals yog reactive oxygen hom. Qhov sib txawv tseem ceeb ntawm cov dawb radicals thiab reactive oxygen hom yog tias dawb radicals yuav los yog tsis muaj oxygen atoms, whereas reactive oxygen hom tseem ceeb muaj oxygen atoms.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm cov dawb radicals thiab cov pa oxygen reactive.
Summary – Dawb radicals vs Reactive Oxygen Hom
Dawb radicals yog reactive atoms los yog pab pawg ntawm atoms muaj ib los yog ntau dua unpaired electron (s), thaum reactive oxygen hom yog radicals uas yog heev reactive thiab muaj unpaired electrons. Qhov sib txawv tseem ceeb ntawm cov dawb radicals thiab reactive oxygen hom yog tias dawb radicals yuav los yog tsis muaj oxygen atoms, whereas reactive oxygen hom tseem ceeb muaj oxygen atoms.
