Video: Yuav tsim cov dawb radicals li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dawb radicals yog cov molecules tsis ruaj khov uas tuaj yeem ua rau cov hlwb hauv koj lub cev puas. Lawv daim ntawv thaum atoms lossis molecules nce lossis poob electrons. Piv txwv li, thaum koj lub cev siv oxygen, nws tsim dawb radicals raws li ib tug by-product thiab kev puas tsuaj los ntawm cov dawb radicals hu ua "oxidative stress."
Ib yam li ntawd, dab tsi yog dawb radicals lawv tsim li cas?
Daim ntawv dawb radicals thaum ib cov no Tsis muaj zog bonds ntawm electrons yog tawg thiab ib tug tsis sib xws ntawm electrons nyob twj ywm. Qhov no txhais tau hais tias lub electron yog unpaired, ua rau nws chemically reactive. Tam sim no nws yuav sim thiab nyiag ib qho hluav taws xob los ntawm ib qho chaw nyob sib ze kom ruaj khov rau nws tus kheej.
Ib yam li ntawd, cov piv txwv ntawm cov dawb radicals yog dab tsi? Ob leeg piv txwv ntawm dawb radicals yog cov carbene molecule (:CH2), uas muaj ob dangling bonds; thiab superoxide anion (•O−2), uas yog cov pa molecule (O2) nrog ib qho ntxiv electron thiab ib daim ntawv cog lus dangling.
Tsuas yog li ntawd, cov zaub mov twg ua rau dawb radicals?
Tsis txhob muaj glycemic siab zaub mov , los yog zaub mov uas yog nplua nuj nyob rau hauv refined carbohydrates thiab qab zib. Lawv feem ntau yuav tsim dawb radicals . Txwv cov nqaij ua tiav xws li hnyuv ntxwm, nqaij npuas kib thiab salami. Lawv muaj preservatives, uas ua rau zus tau tej cov dawb radicals.
Puas yog dawb radicals zoo lossis phem?
Dawb radicals tsis yog xwb phem Rau ib ntev lub sij hawm cov kws tshawb fawb saib cov no dawb radicals , kuj hu ua ROS (reactive oxygen hom) ua "ua phem" vim lawv cov electron raid. Lub sijhawm no, txawm li cas los xij, lawv pom tias lawv - nrog rau qhov sib npaug - kuj muaj txiaj ntsig zoo.
Pom zoo:
Puas yog lub zog tsim cov tshuaj tiv thaiv biochemical uas cov organic molecules pab ob qho tib si electron txais thiab pub dawb?
Txhais kev fermentation. Lub zog tsim cov tshuaj tiv thaiv biochemical uas cov organic molecules ua haujlwm ob qho tib si raws li tus neeg txais hluav taws xob thiab tus neeg pub khoom tshwm sim nyob rau hauv cov xwm txheej anaerobic
Dab tsi ib puag ncig yam cuam tshuam rau kev tsim cov dawb radicals?
Dawb radicals tsis yog tsuas yog tsim nyob rau hauv peb lub cev lub cev thaum lub sij hawm homeostasis tab sis kuj los ntawm kev kis mus rau lwm qhov chaw xws li ib puag ncig muaj kuab paug, tshuaj lom hlau, luam yeeb, thiab tshuaj tua kab, uas ntxiv kev puas tsuaj rau peb lub cev lub nra ntawm oxidative kev nyuaj siab
Dab tsi yog cov dawb radicals hauv daim tawv nqaij?
Dawb radicals tuaj yeem ua rau daim tawv nqaij puas tsuaj los ntawm kev sim lob ib qho hluav taws xob ntxiv los ntawm atoms hauv daim tawv nqaij. Thaum cov atoms raug tshem tawm ntawm cov molecules hauv daim tawv nqaij, nws ua rau peb cov tawv nqaij DNA puas tuaj yeem ua kom nrawm ntawm daim tawv nqaij laus. Qhov no yog hu ua 'dawb radical txoj kev xav ntawm kev laus.'
Cov txheej txheem dab tsi uas tus kws tshawb fawb siv los tsim ntau cov ntawv luam ntawm DNA xav tau sau rau hauv daim ntawv dawb paug 1?
Molecular Cloning. Cloning tso cai rau tsim ntau cov ntawv luam ntawm cov noob, qhia cov noob, thiab kawm txog cov noob tshwj xeeb. Yuav kom tau txais cov DNA tawg rau hauv cov kab mob hauv cov kab mob hauv daim ntawv uas yuav tau theej lossis nthuav tawm, cov khoom tawg yog thawj zaug tso rau hauv plasmid
Yuav ua li cas cov hlwb tshwj xeeb tsim los ua cov haujlwm tseem ceeb hauv ntau cov kab mob?
Multicellular kab mob ua lawv txoj kev ua neej los ntawm kev faib ua haujlwm. Lawv muaj cov hlwb tshwj xeeb uas ua haujlwm tshwj xeeb. Lub Colonial Theory qhia tias kev koom tes ntawm cov hlwb ntawm tib hom coj mus rau kev loj hlob ntawm cov kab mob multicellular