YSucrose vs Lactose
Sucrose thiab lactose yog categorized li carbohydrates. Carbohydrates yog ib pawg ntawm cov tebchaw uas txhais tau tias "polyhydroxy aldehydes thiab ketones lossis cov khoom uas hydrolyze kom tawm los polyhydroxy aldehydes thiab ketones." Carbohydrates yog hom ntau tshaj plaws ntawm cov organic molecules hauv ntiaj teb. Lawv yog lub hauv paus ntawm chemical zog rau cov kab mob nyob. Tsis tas li ntawd xwb, lawv ua haujlwm tseem ceeb ntawm cov ntaub so ntswg. Carbohydrate tuaj yeem muab faib ua peb yam xws li monosaccharides, disaccharides thiab polysaccharides. Monosaccharides yog hom carbohydrate yooj yim tshaj plaws. Glucose, galactose, thiab fructose yog monosaccharides. Disaccharides yog tsim los ntawm kev sib txuas ob monosaccharide molecules. Qhov no yog cov tshuaj tiv thaiv condensation qhov twg cov dej molecule raug tshem tawm. Sucrose, lactose, thiab m altose yog ob peb yam piv txwv rau disaccharides. Ob qho tib si disaccharides thiab monosaccharides qab zib hauv saj. Lawv soluble nyob rau hauv dej. Ob leeg txo cov suab thaj (tshwj tsis yog sucrose). Thaum ntau dua ob lub monosaccharide molecules koom nrog lawv tsim oligosaccharides thiab yog tias lawv muaj qhov hnyav dua molecular (ntau tshaj 10000), cov no hu ua polysaccharides.
Sucrose
Sucrose yog ib qho disaccharide. Nws yog tsim los ntawm kev sib txuas cov piam thaj (aldose qab zib) thiab fructose (ketose qab zib) molecules ntawm glycosidic daim ntawv cog lus. Thaum cov tshuaj tiv thaiv no, ib qho dej molecule raug tshem tawm ntawm ob lub molecules. Sucrose tuaj yeem ua rau hydrolyzed rov qab rau hauv cov molecules pib thaum xav tau. Sucrose muaj cov qauv hauv qab no.
Qhov no yog ib qho disaccharide uas peb pom muaj nyob hauv cov nroj tsuag. Glucose, uas yog tsim los ntawm photosynthesis nyob rau hauv nplooj, yuav tsum tau muab faib mus rau lwm yam loj hlob thiab khaws cia qhov chaw ntawm cov nroj tsuag. Thiab sucrose yog daim ntawv ntawm kev thauj mus los. Yog li ntawd, nyob rau hauv cov nroj tsuag, qabzib hloov mus rau sucrose thiaj li yuav faib lawv. Peb paub txog sucrose hauv peb lub neej niaj hnub, raws li peb tau siv qhov no ua suab thaj. Hauv kev lag luam, cov cane thiab beet yog siv los tsim cov suab thaj. Sucrose yog dawb crystalline khoom. Nws muaj qab zib, thiab nws yooj yim soluble hauv dej.
Lactose
Lactose yog cov disaccharide ua los ntawm kev koom nrog monosaccharides, qabzib thiab galactose ntawm glycosidic daim ntawv cog lus. Nws muaj cov qauv hauv qab no.
Qhov no yog cov disaccharide uas muaj nyob hauv cov mis nyuj. Nyob ntawm tus neeg thiab hom, tus nqi ntawm lactose hauv mis nyuj sib txawv. Hauv cov menyuam mos, muaj ib qho enzyme hu ua lactase los zom cov lactose hauv cov mis nyuj. Yog li ntawd, nyob rau hauv lub digestive system nws lov mus rau hauv qabzib thiab lactose dua, thiab cov suab thaj yooj yim no absorbed rau hauv lub cev. Lactose intolerance yog tus kab mob tshwm sim vim tsis muaj peev xwm zom cov lactose. Lactose yog qhov tseem ceeb hauv kev tsim cov khoom noj siv mis. Thaum tsim curd, cheese thiab yogurt ib txwm muaj, lactose tseem ceeb.
Qhov txawv ntawm Sucrose thiab Lactose yog dab tsi?
• Sucrose yog tsim los ntawm cov piam thaj thiab fructose molecule. Lactose yog tsim los ntawm cov piam thaj thiab galactose molecule.
• Sucrose yog cov qab zib ntau hauv cov txiv hmab txiv ntoo thiab zaub, whereas lactose muaj ntau hauv mis.
• Lactose yog txo cov suab thaj, qhov sucrose tsis yog.
• Yog li ntawd, sucrose tsis teb rau Benedict qhov kev sim o Fehling qhov kev sim. Tab sis yog tias cov tshuaj sucrose tau pib kho nrog dilute acid thiab tom qab ntawd sim siv cov kev sim no, nws muab cov txiaj ntsig zoo
