Mutarotation yog txhais raws li kev hloov pauv ntawm qhov kev sib hloov kho qhov muag Optical rotation Optical rotation, tseem hu ua polarization rotation lossis ncig birefringence, yogkev sib hloov ntawm kev taw qhia ntawm lub dav hlau ntawm polarization txog qhov kho qhov muag axis ntawm linearly polarized teeb raws li nws taug kev los ntawm qee yam khoom. … Kev ua haujlwm kho qhov muag yog ntsuas siv qhov chaw polarized thiab polarized. https://en.wikipedia.org › wiki › Optical_rotation
kev sib hloov kho qhov muag - Wikipedia
vim qhov kev hloov pauv ntawm qhov sib npaug ntawm ob lub anomers, thaum qhov sib thooj stereocenters interconvert. … Gentiobiose yog ib qho hemiacetal nyob rau hauv dej uas nyob rau hauv sib npaug nrog qhib saw daim ntawv. Yog li, Gentiobiose tau hloov pauv.
Dab tsi tuaj yeem hloov pauv tau?
Glucose (hemiacetal) thiab fructose (hemiketal)tuaj yeem hloov pauv. Tab sis sucrose thiab cellulose tsis tuaj yeem - lawv tsis yog hemiacetals (lossis hemiketals). Lawv tsis muaj OH ntawm txoj haujlwm anomeric.
YPuas glyceraldehyde qhia mutarotation?
Peb yuav tsum nkag siab tias kev hloov pauv yog txheej txheem hloov kho qhov muag ntawm cov tebchaw hauv cov tshuaj aqueous. Qhov no yog vim qhov kev hloov pauv ntawm cov khoom siv hauv nruab nrab ntawm ob lub anomers. … Yog li ntawd, sucrose tsis muaj peev xwm qhia txog kev hloov pauv. Glucose kuj yog txo cov suab thaj qhia mutarotation.
Koj puas xav tias Gentiobiose yuav txo qis lossistsis txo qab zib?
Vim cellobiose, m altose thiab gentiobiose yog hemiacetals lawv yog tag nrho cov qab zib(oxidized los ntawm Tollen's reagent). Trehalose, ib qho disaccharide pom nyob rau hauv qee cov nceb, yog ib qho bis-acetal, thiab yog li ntawd yog cov piam thaj tsis txo qis.
Yuav tshem tawm puas tuaj yeem hloov pauv tau?
Disaccharides yog cov tebchaw uas ob lub monosaccharides koom nrog glycosidic daim ntawv cog lus. … Tsis zoo li lwm cov disaccharides, sucrose tsis yog qhov txo cov suab thaj thiab tsis muaj kev hloov pauvvim tias cov glycosidic daim ntawv cog lus yog nruab nrab ntawm cov roj carbon monoxide ntawm cov piam thaj thiab cov roj carbon monoxide ntawm fructose.
