Lub neej tam sim no, tshwm sim muaj ntau tiam ntawm lub neej yog suav tias yog tsis yooj yim sua. Tab sis cov kws tshawb fawb lees paub, thiab qee tus txawm sib cav tias yav dhau los cov txheej txheem no tau tshwm sim thiab tau hu ua abiogenic synthesis ntawm cov organic. Hauv lwm lo lus, cov plhaws organic tuaj yeem tsim sab nraud muaj sia (muaj sia los ntawm tsis muaj sia).
Cov txheej txheem nta
Abiogenic synthesis ntawm cov organic yog qhov ua tau zoo, tab sis qhov no yuav tsum muaj qee yam mob. Thaum lub sijhawm cov txheej txheem no, cov khoom sib xyaw ua tsis tau zoo lossis cov khoom sib xyaw rau cov haiv neeg tau tsim. Cov khoom ntim muaj ntau yam kev sib hloov isomers hauv cov sib npaug.
Niaj hnub no, abiogenic synthesis yog nqa tawm hauv lub chaw soj nstuam tshwj xeeb. Yog li ntawd, ntau lub biomically tseem ceeb monomers tau tshawb xyuas. Ib qho ntawm cov khoom lag luam ntawm abiogenic synthesis uas tsis txawv qhov tseem ceeb rau tib neeg kev ua yog roj. Nyob rau hauv cov txheej txheem ntawm kev tsiv teb tsaws, cov quav tau dhau los ntawm cov tuab ntawm cov pob zeb sedimentary, rho tawm ib qho sib xyaw organic uas nthuav tawm hauv daim ntawv ntawm cov resins thiab porphyrins.
Muaj ntau cov kws tshawb nrhiav, txhawm rau ua pov thawj qhov muaj nyob ntawm abiogenic synthesis, tig mus rau txoj kev ntawm cov txheej txheem kev lag luam kom tau txais cov roj hluavtaws. Txawm li cas los xij, kev pom qhov tob tob rau kev kawm cov roj, cov kws tshawb fawb tau pom qhov sib txawv tseem ceeb ntawm cov khoom sib xyaw ntawm cov khoom ntuj thiab hluavtaws hydrocarbon. Nyob rau hauv tom kawg, muaj kev xyaum tsis muaj cov txheej txheem nyuaj uas muaj cov roj nyeem uas khov nrog cov tshuaj xws li cov roj ntsha, terpenes, styrenes.
Hauv chav kuaj mob, abiogenic synthesis yog nqa tawm los ntawm kev siv hluav taws xob ultraviolet, hluav taws xob paug lossis raug rau kub.
Cov theem ntawm kev ua tiav ntawm abiogenic synthesis
Cov kws tshawb fawb feem ntau lees tias niaj hnub no cov txheej txheem ntawm abiogenic synthesis yog qhov tsis yooj yim sab nraud ntawm kev sim. Cov kws tshawb nrhiav ntseeg tau hais tias qhov kev tshwm sim no tau tshwm sim txog 3.5 txhiab lub xyoo dhau los. Tsis tas li ntawd, qhov kev tsim hluavtaws ntawm cov organic ua tau ob ntu:
- qhov rov tshwm sim ntawm cov phaus molecular phaus qis hauv lub tebchaw - ntawm lawv tau yog cov roj hydrocarb uas muaj qhov cuam tshuam nrog cov pa dej, ua rau muaj kev tsim cov tebchaw xws li cawv, ketones, aldehydes, organic acids; intermediates kev hloov mus rau hauv monosaccharides, nucleotides, amino acids thiab phosphates;
- kev siv ntawm kev sib txuas ntawm cov khoom sib txuas yooj yim ntawm cov siab molecular phaus organic tshuaj, hu ua biopolymers (protein, lipids, nucleic acids, polysaccharides) - tshwm sim vim los ntawm cov tshuaj tiv thaiv polymerization, uas tau ua tiav vim qhov kub thiab ionizing hluav taws xob.
Abiogenic synthesis ntawm cov organic tau lees paub los ntawm kev tshawb fawb uas tau ua pov thawj tias cov sib txuas ntawm hom no tau pom hauv qhov chaw.
Nws ntseeg tau tias inorganic catalysts (piv txwv li, av nplaum, ferrous hlau, tooj liab, zinc, titanium thiab silicon oxides) yog qhov tseem ceeb rau kev siv ntawm abiogenic synthesis.
Saib ntawm cov kws tshawb fawb niaj hnub no txog keeb kwm ntawm lub neej
Muaj ntau tus kws tshawb nrhiav tau hais tias qhov pib ntawm lub neej nyob ze rau ntawm thaj chaw nqaum dej ntawm hiav txwv thiab dej hiav txwv. Ntawm hiav txwv-av-cua ciam teb, muaj txiaj ntsig zoo tsim tau tsim rau kev tsim cov sau sib txuas.
Txhua tus neeg muaj sia, qhov tseeb, yog qhib kev ua haujlwm uas tau txais lub zog tawm sab nraud. Lub neej nyob hauv lub ntiaj teb yeej ua tsis tau yam tsis muaj ib lub zog tshwj xeeb. Lub sijhawm tam sim no, qhov tshwm sim ntawm qhov tshwm sim ntawm cov muaj sia muaj sia muaj tsawg tsawg, vim nws siv ntau txhiab xyoo los tsim qhov peb muaj niaj hnub no. Txawm hais tias cov organic tebchaw pib tawm, lawv yuav oxidized tam sim ntawd lossis siv los ntawm cov kab mob heterotrophic.
