Qhov sib txawv tseem ceeb ntawm chitin thiab chitosan yog tias chitin tsis muaj pawg amine dawb, qhov chitosan muaj pab pawg amine dawb.
Chitin yog ib qho amide derivative ntawm qabzib. Chitosan yog linear polysaccharide compound. Chitosan yog tsim los ntawm kev kho chitin nrog alkaline compound xws li sodium hydroxide.
Chitin yog dab tsi?
Chitin yog ib qho amide derivative ntawm qabzib. Peb tuaj yeem hu nws ua cov saw hlau ntev ntev ntawm N-acetylglucosamine. Nws yog ib hom polysaccharide uas tshwm sim los ua ib qho tseem ceeb ntawm cov phab ntsa ntawm tes hauv cov kab mob fungi, nyob rau hauv exoskeleton ntawm lub arthropods, nyob rau hauv lub radulae ntawm molluscs, cephalopod beaks, thiab nyob rau hauv cov nplai ntawm ntses.
Chitin yog qhov thib ob ntau tshaj plaws polysaccharide nyob rau hauv cov xwm uas los tom qab cellulose. Peb tuaj yeem sib piv cov qauv ntawm chitin nrog cellulose, qhov twg muaj crystalline nanofibrils ntawm whiskers. Ua haujlwm zoo, peb tuaj yeem sib piv nws nrog cov protein keratin. Ntxiv mus, qhov sib xyaw no muaj cov ntawv thov tseem ceeb hauv tshuaj, kev lag luam, thiab biotechnological lub hom phiaj.
Daim duab 01: Cov Qauv Tshuaj ntawm Chitin
Cov qauv tshuaj ntawm chitin yog thawj zaug los ntawm Albert Hoffmann hauv xyoo 1929. Nws hydrolyzed cov tshuaj no los ntawm kev npaj tsis zoo ntawm cov enzyme chitinase. Nws tau txais cov enzyme no los ntawm ib tug qwj hu ua Helix pomatia. Chitin tuaj yeem piav qhia raws li kev hloov pauv polysaccharide uas muaj nitrogen. Cov monomers uas tsim cov qauv polysaccharide yog N-acetyl-D-glucosamine units. Cov chav no txuas nrog ib leeg los ntawm beta 1-4 covalent bonds. Qhov no yog vim li cas peb tuaj yeem sib piv cov qauv ntawm chitin nrog cov qauv ntawm cellulose uas muaj cov qauv zoo sib xws, tab sis nyob rau hauv chitin, ib pawg hydroxyl ntawm cellulose yog hloov nrog ib pawg acetyl amine hauv txhua chav monomer. Cov qauv no tso cai rau chitin molecule kom muaj ntau cov hydrogen bonds ntawm cov polymers nyob sib ze. Yog li ntawd, cov qauv matrix ntawm chitin muaj zog.
Thaum chitin nyob rau hauv daim ntawv ntshiab, peb tuaj yeem soj ntsuam nws ua ib qho sib xyaw ua ke uas yog pliable, resilient, thiab tawv heev. Thaum nws raug hloov kho, nws tsim ib qho kev sib tw hnyav dua, piv txwv li. Kev sib xyaw nrog calcium carbonate ua rau cov qauv tawv thiab tsawg dua.
Thaum xav txog kev siv chitin, nws muaj cov ntawv thov hauv kev ua liaj ua teb thiab kev lag luam. Hauv kev ua liaj ua teb, cov tshuaj no tuaj yeem siv los ua ib qho zoo inducer rau cov nroj tsuag tiv thaiv mechanisms thaum tswj cov kab mob. Lwm cov kev lag luam uas siv chitin suav nrog kev lag luam ua zaub mov thiab tsim cov yeeb yaj kiab uas siv tau.
Chitosan yog dab tsi?
Chitosan yog linear polysaccharide compound. Nws muaj randomly faib beta 1-4 bonds ntawm D-glucosamine thiab N-acetyl-D-glucosamine. Peb tuaj yeem ua cov tshuaj no los ntawm kev kho cov chitin plhaub ntawm cw nrog cov tshuaj alkaline xws li sodium hydroxide.
Daim duab 02: Cov Qauv Tshuaj ntawm Chitosan
Industrially, peb tuaj yeem tsim chitosan los ntawm deacetylation ntawm chitin tau los ntawm exoskeleton ntawm crustaceans thiab cell phab ntsa ntawm fungi. Peb tuaj yeem txiav txim siab qib ntawm deacetylation siv txoj kev NMR.
Muaj ntau yam kev siv chitosan, uas suav nrog kev siv ua liaj ua teb, kev siv horticultural, ua ib feem ntawm cov txheej txheem pom, siv los ua tus neeg saib xyuas nyiaj hauv winemaking, kev siv kho mob, hauv kev tshawb fawb, bioprinting, thiab lwm yam.
Qhov txawv ntawm Chitin thiab Chitosan yog dab tsi?
Chitin thiab chitosan yog polysaccharide compounds. Chitin yog ib qho amide derivative ntawm qabzib, thaum chitosan yog linear polysaccharide compound. Lawv txawv ntawm ib leeg raws li lawv cov tshuaj thiab lub cev. Qhov sib txawv tseem ceeb ntawm chitin thiab chitosan yog tias chitin tsis muaj pawg amine dawb, thaum chitosan muaj pab pawg amine dawb.
Daim duab hauv qab no nthuav tawm qhov sib txawv ntawm chitin thiab chitosan hauv daim ntawv tabular.
Summary – Chitin vs Chitosan
Chitin thiab chitosan yog polysaccharide compounds. Chitin yog ib qho amide derivative ntawm qabzib, thaum Chitosan yog linear polysaccharide compound. Qhov sib txawv tseem ceeb ntawm chitin thiab chitosan yog tias chitin tsis muaj pawg amine dawb, thaum chitosan muaj pab pawg amine dawb.
