Video: Cov tshuaj tiv thaiv ntawm starch thiab iodine yog dab tsi?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Siv iodine los kuaj seb puas muaj hmoov txhuv nplej siab yog ib qho kev sim. Kev daws teeb meem ntawm iodine (I2) thiab potassium iodide (KI) hauv dej muaj xim txiv kab ntxwv-xim av. Yog tias nws tau ntxiv rau cov qauv uas muaj hmoov txhuv nplej siab , xws li cov khob cij uas tau hais los saum toj no, cov xim hloov mus rau xim xiav.
Ib yam li ntawd, koj yuav nug, iodine ua li cas nrog cov hmoov txhuv nplej siab?
Cov hmoov txhuv nplej siab muaj ob hom molecules, amylose - soluble hmoov txhuv nplej siab thiab amylopectin. Thaum twg hmoov txhuv nplej siab yog tov nrog iodine hauv dej, muaj xim xiav heev hmoov txhuv nplej siab / iodine complex yog tsim. Muaj ntau cov ntsiab lus ntawm lub tshuaj tiv thaiv tseem tsis paub. Thaj, cov Iodine tau nyam hauv cov coils ntawm beta amylose molecules.
Zoo sib xws, vim li cas iodine hloov Xim hauv hmoov txhuv nplej? Amylose nyob rau hauv hmoov txhuv nplej siab yog lub luag haujlwm rau kev tsim cov xim xiav xim nyob rau hauv lub xub ntiag ntawm iodine . Cov iodine molecule plam sab hauv ntawm amylose kauj. Qhov no ua rau linear triiodide ion complex nrog yog soluble uas ntws mus rau hauv cov kauj ntawm hmoov txhuv nplej siab ua rau mob hnyav xiav-dub xim.
Ntawm no, yuav ua li cas thaum koj sib tov pob kws thiab iodine?
Cov iodine hloov xim hauv ib cov hmoov, tab sis tsis yog lwm yam. Cov iodine thiab cov pob kws yog tej zaum cov tshuaj hloov pauv vim qhov hloov xim zoo li zoo li tej yam tshiab yuav tau tsim. Cov iodine tsis hloov xim thaum nws ua ke nrog ci dej qab zib.
Yuav ua li cas rau starch thiab iodine tom qab cua sov?
Qhov no yog vim qhov sib xyaw ntawm iodine thiab hmoov txhuv nplej siab tsis ruaj tsis khov, tab sis yog tias koj muab lub raj tso rau hauv cov dej txias, cov dej xiav tsaus yuav tshwm ib zaug ntxiv. Thaum twg hmoov txhuv nplej siab yog cua sov mus rau boiling point, nws pib tawg, thiab chains ntawm amyloses tawg, yog li tsim luv chains ntawm dextrins, yog li cov xim pib hloov.
Pom zoo:
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