Video: Cov piam thaj thiab fructose tsim sucrose li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Monosaccharides xws li qabzib tuaj yeem yuav txuas ua ke nyob rau hauv cov tshuaj tiv thaiv cov tshuaj tiv thaiv. Piv txwv li, qab zib (rooj qab zib ) yog tsim los ntawm ib lub molecule ntawm qabzib thiab ib ntawm fructose qab zib , raws li qhia hauv qab no. Molecules muaj ob lub monosaccharides yog hu ua disaccharides. Ib daim ntawv cog lus glycosidic tau nyob nruab nrab ntawm ob lub monosaccharides.
Raws li qhov no, yuav ua li cas cov piam thaj thiab fructose sib xyaw ua sucrose?
Ib qho hydrogen atom los ntawm ib qho molecule thiab pawg hydroxyl los ntawm lwm cov qauv yog tshem tawm raws li dej, nrog rau covalent daim ntawv cog lus txuas ob suab thaj ua ke ntawm qhov ntawd. Glucose thiab fructose ua ke los tsim cov disaccharide qab zib nyob rau hauv ib qho tshuaj tiv thaiv cov tshuaj tiv thaiv.
Ib yam li ntawd, piam thaj thiab fructose ua dab tsi? Fructose hmoov , los yog txiv hmab txiv ntoo qab zib, yog ib qho yooj yim ketonic monosaccharide pom nyob hauv ntau cov nroj tsuag, qhov uas nws feem ntau sib raug zoo qabzib rau daim ntawv sucrose ntawm disaccharide. Nws yog ib qho ntawm peb qhov kev noj haus monosaccharides, nrog rau qabzib thiab galactose, uas yog absorbed ncaj qha rau hauv cov ntshav thaum digestion.
Thiab kom paub yog, kev sib raug zoo ntawm qab zib fructose thiab sucrose yog dab tsi?
Sucrose Ua los ntawm Glucose thiab Fructose hmoov Disaccharides yog ua los ntawm ob qho, txuas nrog monosaccharides thiab tawg rov qab mus rau tom kawg thaum lub sijhawm zom zaub mov (1). Sucrose yog ib tug disaccharide muaj ib qabzib thiab ib fructose qab zib molecule, los yog 50% qabzib thiab 50% fructose qab zib.
Vim li cas fructose thiab piam thaj muaj cov mis zoo ib yam?
Txawm hais tias qabzib galactose, thiab fructose qab zib tag nrho muaj cov ib yam tshuaj qauv (C6H12O6), lawv txawv structurally thiab stereochemically. Qhov no ua rau lawv sib txawv molecules txawm sib koom ib yam atoms nyob rau hauv ib yam proportions, thiab lawv yog tag nrho cov isomers ntawm ib leeg, los yog isomeric monosaccharides.
Pom zoo:
Cov enzymes twg pab hloov pauv sucrose rau hauv piam thaj thiab fructose?
Cov enzyme hauv tib neeg uas hloov sucrose rau piam thaj thiab fructose tau hu ua sucrase, tab sis invertase tau siv vim tias nws pheej yig dua thiab yooj yim dua rau kev yuav
Cov kab mob hauv qhov ncauj dab tsi metabolize sucrose tsim cov nplaum glucans thiab tsim cov quav hniav?
GTF yog qhov tseem ceeb enzyme uas catalyzes sucrose rau nplaum glucans thiab pab txhawb kev tsim cov hniav plaque nyob rau hauv uas lub tsub zuj zuj ntawm metabolic acids uas ua los ntawm cov kab mob colonies ua rau lub zos demineralization ntawm cov enamel nto (Loesche, 1986)
Yuav ua li cas hloov sucrose rau piam thaj thiab fructose?
Hauv tib neeg thiab lwm yam tsiaj, sucrose tau tawg rau hauv nws cov khoom sib xyaw monosaccharides, qabzib thiab fructose, los ntawm sucrase lossis isomaltase glycoside hydrolases, uas nyob hauv daim nyias nyias ntawm microvilli hauv ob sab hauv duodenum. Hauv cov kab mob thiab qee tus tsiaj, sucrose tau zom los ntawm cov enzyme invertase
Koj yuav ua li cas txhawm rau kev sib raug zoo ntawm cov piam thaj thiab fructose?
Teb thiab piav qhia: Hydrolysis yog siv los rhuav tshem cov piam thaj thiab fructose hauv cov molecule sucrose. Hydrolysis suav nrog ntxiv dej rau kev sib txuas ntawm cov no
Yuav ua li cas sucrose ua los ntawm piam thaj thiab fructose?
Disaccharides: Sucrose tau tsim thaum lub monomer ntawm cov piam thaj thiab monomer ntawm fructose tau koom nrog hauv cov tshuaj tiv thaiv lub cev qhuav dej los tsim cov glycosidic bond. Hauv cov txheej txheem, ib qho dej molecule ploj lawm. Hauv sucrose, kev sib txuas glycosidic yog tsim los ntawm carbon 1 hauv qabzib thiab carbon 2 hauv fructose