Disaccharides muaj ob lub monosaccharides thiab yuav txo qis lossis tsis txo qis. Txawm tias ib qho kev txo qis disaccharide yuav tsuas muaj qhov txo qhov kawg, vim tias cov disaccharides tau tuav ua ke los ntawm glycosidic bonds, uas muaj tsawg kawg yog ib qho anomeric carbon.
Yuav ua li cas disaccharides ua kom txo cov suab thaj?
Ib yam li ntawd, qee qhov disaccharides xws li m altose thiab lactose muaj hemiacetal. Lawv kuj yog txo cov suab thajuas muab qhov txiaj ntsig zoo Fehlings, Benedict, lossis Tollens test (daim duab ntawm lactose zoo xeem yog ntxiv hauv qab).
Vim li cas disaccharides tsis txo cov suab thaj?
Disaccharides yog tsim los ntawm ob lub monosaccharides thiab tuaj yeem raug cais raws li kev txo qis lossis tsis txo qis. Nonreucing disaccharides zoo li sucrose thiab trehalose muaj glycosidic bonds ntawm lawv cov pa roj carbon monoxide thiab yog li tsis tuaj yeem hloov mus rau hauv daim ntawv qhib-kab nrog pawg aldehyde; lawv daig hauv daim ntawv cyclic.
Puas tag nrho cov disaccharides ua raws li txo tus neeg sawv cev Vim li cas?
Non-txo Disaccharides
Cov disaccharides tsis txhob coj tus cwj pwm txo qis vim lawv tsis muaj cov pab pawg ua haujlwm dawb aldehydic lossis ketonic ua haujlwm. Cov pab pawg ua haujlwm ntawm ob qho tib si monosaccharides tau noj nyob rau hauv cov txheej txheem ntawm glycosidic daim ntawv cog lus.
Dab tsi yog cov disaccharides txo?
Txo cov disaccharides, nyob rau hauv uas ib qho monosaccharide, txo cov suab thaj ntawm ob khub, tseem muaj ib chav dawb hemiacetal uas tuaj yeem ua tau raws li kev txo qis aldehyde pawg; lactose, m altose thiab cellobiose yog cov piv txwv ntawm kev txo cov disaccharides, txhua tus muaj ib chav hemiacetal, lwm qhov nyob ntawm glycosidic daim ntawv cog lus, uas …
