Qhov sib txawv tseem ceeb ntawm cellulose thiab starch yog tias cellulose yog cov qauv polysaccharide uas muaj beta 1, 4 kev sib txuas ntawm cov piam thaj monomers thaum cov hmoov txhuv nplej siab yog ib qho chaw cia khoom polysaccharide uas muaj alpha 1, 4 kev sib txuas ntawm cov piam thaj monomers.
Starch thiab Cellulose yog macromolecules teej tug mus rau tib pawg ntawm carbohydrates. Carbohydrates yog ib qho ntawm cov khoom siv hluav taws xob hauv cov khoom noj. Lawv muaj cov mis molecular CH2O. Ob peb monomer units ntawm qabzib, sib cuam tshuam los ntawm kev sib txuas tshuaj, ua rau cov macromolecules. Yog li, lawv muaj qhov hnyav molecular.
Cellulose yog dab tsi?
Cellulose yog daim ntawv polymeric ntawm cov piam thaj txuas ua ke los ntawm glycoside linkages. Yog li ntawd, nws yog cov organic molecule tshaj plaws thiab lub tsev loj ntawm cov nroj tsuag. Paj rwb thiab ntawv yog qee hom ntawm cov cellulose ntshiab. Nws muaj txog 4000-8000 qabzib molecules nrog beta bonds ntawm 1st C ntawm thawj chav tsev thiab 4th carbon ntawm cov qabzib tom ntej. Yog li, nws tsim beta 1, 4 linkages. Muaj ob hom cellulose xws li hemicellulose thiab lignin.
Daim duab 01: Cellulose
Ntxiv mus, cellobiose yog lwm daim ntawv, uas tshwm sim los ntawm hydrolysis ntawm cellulose. Yog li, nws yog ib qho disaccharide ua los ntawm ob lub qabzib molecules txuas ntawm beta 1, 4 linkage. Tsis tas li ntawd, cellulases hydrolyze cellulose rau hauv nws cov monomers.
Starch yog dab tsi?
Starch yog qhov tseem ceeb zoo ib yam li cellulose nyob rau hauv muaj pes tsawg leeg. Yog li, lawv yog cov ntaub ntawv polymeric ntawm cov piam thaj molecules txuas los ntawm alpha 1, 4 linkage. Tus naj npawb ntawm cov molecules ua rau cov hmoov txhuv nplej siab tuaj yeem sib txawv ntawm 4000 - 8000. Cov saw ntawm cov piam thaj tuaj yeem yog linear, branched los yog sib xyaw ntawm ob qho tib si nyob ntawm qhov chaw thiab qhov chaw uas daim ntawv khaws cia. Nws yog thawj daim ntawv khaws cia ntawm carbohydrate.
Daim duab 02: Qos yaj ywm Starch
Ntxiv mus, hmoov txhuv nplej siab yog ib daim ntawv khaws cia ntawm carbohydrates hauv cov nroj tsuag. Cov khoom ntawm cov hmoov txhuv nplej siab tuaj yeem sib txawv ntawm ib mus rau lwm qhov nyob ntawm qhov chaw uas nws tau cais. Cov khoom kuj yog nyob ntawm qhov xwm ntawm cov ceg thiab cov naj npawb ntawm alpha 1, 4 glycoside bonds. Muaj ob hom hmoov txhuv nplej siab; Lawv yog amylase thiab amylopectin.
Dab tsi yog qhov zoo sib xws ntawm Cellulose thiab Starch?
- Ob leeg yog carbohydrates thiab polysaccharides.
- Lawv suav nrog tib monomers; qabzib.
- Cellulose thiab Starch muaj tib lub qabzib raws li rov ua dua units.
- Ob leeg ua tiav lub zog ntawm peb lub cev.
- Lawv muaj qhov hnyav molecular.
- Cellulose thiab Starch muaj qhov sib xws.
- Starch thiab cellulose muaj nyob hauv cov nroj tsuag.
Qhov txawv ntawm Cellulose thiab Starch yog dab tsi?
Txawm hais tias ob qho tib si hmoov txhuv nplej siab thiab cellulose yog cov ntaub ntawv polymeric ntawm cov piam thaj, lawv txawv ntawm lawv cov tshuaj thiab lub cev. Cov kev sib txawv no feem ntau yog los ntawm qhov sib txawv ntawm kev sib txuas. Cellulose muaj beta 1, 4 kev sib txuas ntawm cov piam thaj molecules whereas starch muaj 1, 4 alpha linkages ntawm cov piam thaj molecules. Qhov no yog qhov sib txawv tseem ceeb ntawm cellulose thiab starch. Tsis tas li ntawd, qhov sib txawv ntawm cov cellulose thiab cov hmoov txhuv nplej siab yog tias cov cellulose yog cov txheej txheem nruj polysaccharide thaum cov hmoov txhuv nplej siab yog ib qho chaw cia khoom polysaccharide.
Cov hauv qab no infographic tabulates qhov sib txawv ntawm cellulose thiab starch nrog cov ntsiab lus ntxiv.
Summary – Cellulose vs Starch
Txawm hais tias hmoov txhuv nplej siab thiab cellulose yog ob qho tib si polymeric cov ntaub ntawv ntawm qabzib, lawv txawv ntawm cov khoom. Cov kev sib txawv no zoo li qhov tshwm sim ntawm qhov sib txawv ntawm ib qho tshuaj sib txuas ntawm cov monomeric units. Cov xwm txheej sib txawv ua rau cov carbohydrates ua si ob lub zog muab kev ua haujlwm nrog rau lub luag haujlwm ntawm cov qauv. Ob leeg cellulose thiab starch ua kom tiav lub zog xav tau ntawm cov kab mob. Txawm li cas los xij, cellulose plays lub luag haujlwm tseem ceeb thaum starch plays lub luag haujlwm khaws cia. Cellulose muaj 1, 4 beta linkages ntawm cov piam thaj monomers. Nyob rau hauv sib piv, starch muaj 1, 4 alpha linkages. Qhov no yog qhov txawv ntawm cellulose thiab starch.
