Cov Khoom Siv Polymer Ntuj: Kev Tsim Kho Tshiab thiab Cov Txiaj Ntsig hauv Lub Neej Txhua Hnub
Cov polymers yog cov molecule loj uas muaj cov units rov ua dua hu ua monomers, txuas los ntawm cov bonds covalent. Cov polymers pom muaj ntau hom hauv xwm thiab ua lub luag haujlwm tseem ceeb hauv lub neej txhua hnub. Cov polymers poob rau hauv ob pawg tseem ceeb: cov polymers hluavtaws thiab cov polymers ntuj. Hauv tsab xov xwm no, peb yuav tsom mus rau cov polymers ntuj, suav nrog cov protein, nucleic acids, thiab polysaccharides, thiab lawv cov ntawv thov thiab cov txiaj ntsig hauv ntau qhov chaw.
1. Kev Taw Qhia Txog Cov Polymers Ntuj
Cov polymers ntuj tsim yog cov tshuaj sib xyaw ua ke los ntawm cov kab mob uas muaj sia nyob. Lawv ua lub luag haujlwm tseem ceeb hauv cov qauv thiab kev ua haujlwm ntawm cov kab mob no. Qee cov piv txwv ntawm cov polymers ntuj suav nrog cov protein, DNA, RNA, thiab ntau hom polysaccharides xws li cellulose thiab chitin. Cov polymers ntuj muaj qhov zoo ntawm kev ua kom ib puag ncig zoo dua li cov polymers hluavtaws, uas feem ntau nyuaj rau lwj thiab tuaj yeem ua rau muaj teeb meem loj rau ib puag ncig.
2. Protein: Cov Qauv thiab Kev Ua Haujlwm
Cov protein yog cov polymers ua los ntawm cov amino acid monomers. Muaj ntau txhiab hom protein sib txawv hauv tib neeg lub cev, txhua tus muaj nws tus qauv thiab kev ua haujlwm tshwj xeeb. Cov protein ua lub luag haujlwm tseem ceeb hauv yuav luag txhua txoj kev ua haujlwm ntawm lub cev, suav nrog cov enzymes uas pab txhawb cov tshuaj tiv thaiv, cov tshuaj tiv thaiv kab mob uas tiv thaiv lub cev ntawm cov kab mob, thiab cov tshuaj hormones uas tswj cov txheej txheem ntawm lub cev.
Cov protein yog tsim los ntawm cov saw ntev ntawm cov amino acids uas muab tais ua cov qauv peb-seem uas nyuaj. Cov qauv no tseem ceeb rau kev ua haujlwm ntawm cov protein. Piv txwv li, cov enzymes muaj cov chaw tshwj xeeb uas tso cai rau lawv khi cov substrates thiab catalyze biochemical reactions.
Ntxiv rau nws cov haujlwm ntawm lub cev, cov protein kuj tseem siv dav hauv kev lag luam khoom noj thiab dej haus, cov khoom siv zoo nkauj, tshuaj, thiab ntau ntxiv. Collagen, ib hom protein, feem ntau siv rau hauv cov khoom siv saib xyuas tawv nqaij vim nws cov khoom uas pab tswj kom tawv nqaij elasticity thiab suppleness.
3. Cov Kua Txob Nucleic: Cov Khoom Nqa Cov Ntaub Ntawv Txog Genetic
Cov nucleic acids, uas suav nrog DNA (deoxyribonucleic acid) thiab RNA (ribonucleic acid), yog cov polymers uas khaws thiab xa cov ntaub ntawv genetic hauv cov tsiaj txhu. Cov monomers ntawm nucleic acids yog nucleotides, uas muaj cov nitrogenous base, qab zib, thiab phosphate pawg.
DNA yog daim ntawv qhia txog noob caj noob ces uas muaj cov lus qhia rau kev txhim kho, kev ua haujlwm, kev loj hlob, thiab kev yug me nyuam ntawm txhua yam tsiaj txhu thiab ntau yam kab mob. RNA ua lub luag haujlwm hauv ntau yam haujlwm, suav nrog kev tsim cov protein thiab kev tswj hwm kev qhia tawm noob caj noob ces. Hauv biotechnology thiab tshuaj, DNA- thiab RNA-raws li cov txheej txheem xws li Polymerase Chain Reaction (PCR) thiab CRISPR thev naus laus zis tau hloov pauv kev tshawb fawb txog noob caj noob ces thiab kev kho noob caj noob ces.
4. Polysaccharides: Qhov Chaw Muaj Zog thiab Cov Khoom Siv Hauv Tsev
Cov polysaccharides yog cov polymeric carbohydrates uas muaj cov saw ntev ntawm monosaccharides txuas nrog los ntawm glycosidic bonds. Cov piv txwv feem ntau yog cellulose, chitin, thiab starch. Polysaccharides muaj ob lub luag haujlwm ua lub zog thiab cov khoom siv hauv ntau yam tsiaj txhu.
– Cellulose yog cov khoom tseem ceeb ntawm cov phab ntsa cell ntawm cov nroj tsuag thiab yog cov polymer organic uas muaj ntau tshaj plaws hauv ntiaj teb. Nws siv rau kev ua ntawv, ntaub, thiab cov khoom siv hauv tsev.
– Hmoov txhuv nplej yog lub hauv paus tseem ceeb ntawm lub zog rau tib neeg thiab tsiaj txhu, pom muaj nyob rau hauv cov khoom noj tseem ceeb xws li mov, nplej, thiab qos yaj ywm. Kev lag luam zaub mov siv hmoov txhuv nplej ntau heev hauv kev tsim ntau yam khoom noj ua tiav.
- Chitin pom muaj nyob rau hauv cov pob txha ntawm cov kab thiab cov crustaceans thiab nyob rau hauv cov phab ntsa ntawm cov nceb. Chitin thiab nws cov derivative, chitosan, yog siv rau hauv kev lag luam kho mob, xws li cov ntaub qhwv qhov txhab kom sai kho thiab hauv kev kho dej ua cov tshuaj nqus cov pa phem.
5. Cov Ntawv Thov thiab Kev Tsim Kho Tshiab
Cov polymers ntuj tsim tsis yog tsuas yog tseem ceeb vim lawv lub luag haujlwm hauv cov tsiaj txhu xwb, tab sis kuj vim lawv cov kev siv tshiab hauv ntau yam lag luam:
– Kev Lag Luam Kho Mob: Gelatin thiab collagen yog siv rau hauv kev tsim cov tshuaj ntsiav, cov ntaub qhwv, thiab cov khoom siv kho qhov txhab. Cov biopolymers xws li polylactic acid (PLA) kuj tseem tab tom tsim los ua cov khoom siv biodegradable rau kev cog hniav thiab cov xov phais.
– Kev Lag Luam Khoom Noj: Cov polysaccharides xws li gum arabic, pectin, thiab alginate yog siv los ua cov thickeners, stabilizers, thiab emulsifiers hauv ntau yam khoom noj ua tiav.
– Cov Khoom Siv Uas Yaj Tau Hauv Lub Cev: Txawm hais tias cov polymers ua los ntawm cov yas ib txwm muaj ua rau muaj ntau yam teeb meem ib puag ncig, cov polymers ntuj tsim muaj kev daws teeb meem zoo dua rau ib puag ncig. PLA thiab poly-3-hydroxybutyrate (PHB) yog cov piv txwv ntawm cov polymers yaj tau hauv lub cev uas siv rau hauv kev tsim cov hnab yuav khoom, lub raj mis, thiab cov ntim khoom.
6. Tej Kev Cov Nyom thiab Yav Tom Ntej
Txawm hais tias cov polymers ntuj muaj ntau qhov zoo, kuj muaj qee qhov kev cov nyom uas yuav tsum kov yeej:
1. Kev sib haum xeeb thiab kev ruaj khov: Qee cov polymers ntuj tuaj yeem raug kev puas tsuaj lossis kev hloov pauv tsis xav tau hauv cov khoom siv lub cev thiab tshuaj lom neeg nyob rau hauv qee qhov xwm txheej.
2. Kev Loj Hlob ntawm Kev Tsim Khoom: Kev tsim cov polymers ntuj loj tuaj yeem kim thiab nyuaj, xav tau kev tshawb fawb ntxiv kom ua tau zoo dua.
3. Kev Tswjfwm thiab Kev Nyab Xeeb: Kev siv cov polymers ntuj tshiab, tshwj xeeb tshaj yog hauv kev kho mob thiab khoom noj khoom haus, yuav tsum tau muaj kev soj ntsuam zoo txog lawv txoj kev noj qab haus huv.
Txawm li cas los xij, yav tom ntej ntawm cov polymers ntuj zoo li ci ntsa iab. Nrog rau kev nce qib ntawm thev naus laus zis thiab kev tshawb fawb, cov cib fim tshiab rau kev siv cov polymer ntuj tab tom tshwm sim. Piv txwv li, kev tsim kho caj ces tso cai rau peb hloov kho cov kab mob me me kom tsim cov polymers ntuj zoo dua thiab ntau dua.
Kev kaw
Cov polymers ntuj, ua cov khoom tseem ceeb hauv lub neej txhua hnub thiab ntau yam lag luam, muaj ntau yam zoo, los ntawm kev sib haum xeeb ntawm cov khoom siv mus rau kev lwj ntawm cov khoom siv. Txawm hais tias muaj kev cov nyom uas yuav tsum tau kov yeej, kev tsim kho tshiab txuas ntxiv mus kom tau txiaj ntsig zoo tshaj plaws thiab kev siv cov polymers ntuj. Nrog rau kev paub txog ib puag ncig ntau ntxiv thiab qhov xav tau cov kev daws teeb meem ruaj khov dua, cov polymers ntuj yuav yog cov lus teb rau ntau yam teeb meem uas lub ntiaj teb niaj hnub no ntsib. Los ntawm kev tshawb fawb thiab kev txhim kho tas mus li, cov polymers ntuj yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev tsim kho tshiab thiab txhim kho lub neej zoo ntawm tib neeg.
