Fat vs Saturated Fat
Rog yog ib pawg ntawm cov tshuaj sib xyaw ua ke, uas yog ib qho tseem ceeb ntawm cov khoom noj tsim nyog los txhawb nqa lub cev ua haujlwm ib txwm muaj, vim lawv muab ob qho tib si lub zog thiab cov molecules tseem ceeb. Nyob ntawm cov qauv tshuaj, cov pab pawg no tau faib dav dav rau cov roj saturated thiab unsaturated rog uas lawv muaj qhov sib txawv ntawm cov qauv atomic, qhov chaw uas lawv tau txais los ntawm, lub cev thiab tshuaj lom neeg. Kab lus no qhia txog seb cov roj saturated txawv li cas los ntawm lwm cov tswv cuab ntawm pab pawg no tshwj xeeb tshaj yog cov roj tsis muaj roj.
Fat
Raws li tau hais los saum toj no, rog yog ib pawg loj heterogeneous ntawm cov tebchaw. Rog ua lub luag haujlwm tseem ceeb hauv lub cev es tsis ua raws li lub zog. Lawv yog ib qho tseem ceeb hauv kev ua kom palatability ntawm cov zaub mov, ua kom muaj kev zoo siab ntawm satiety thiab nqus cov roj soluble vitamins A, D, E thiab K. tus nqi txaus kom tau raws li qhov xav tau ntawm kev loj hlob thiab kev saib xyuas. Ntawm lawv, rog yog ib qho tseem ceeb ntawm cov khoom noj khoom haus.
Thaum xav txog cov qauv atomic nws yog tsim los ntawm carbon, hydrogen, thiab oxygen atoms nrog ib lossis ob daim ntawv cog lus nyob nruab nrab ntawm cov pa roj carbon atoms. Nyob ntawm seb muaj ib los yog ob daim ntawv cog lus pab pawg no yog categorized li saturated thiab nonsaturated fatty acids.
Saturated fat
Nyob rau hauv cov qauv tshuaj ntawm saturated fatty acids, cov pa roj carbon atoms tag nrho saturated nrog hydrogen atoms thiab tsis muaj ob daim ntawv cog lus. Thawj tus tswv cuab ntawm cov koob no yog acetic acid (CH3-COOH) uas lwm tus tswv cuab ntawm pab pawg no tau ua raws los ntawm kev nce qib ntxiv -CH2- pab pawg nyob nruab nrab ntawm cov terminals CH3- thiab -COOH pawg. Propionic, butyric, valeric, caproic, lauric, myristic thiab palmitic yog qee qhov piv txwv ntawm pawg no.
Saturated fatty acids feem ntau tau los ntawm cov tsiaj txhu tshwj tsis yog cov ntses, uas cov fatty acids yog unsaturated loj. Nyob rau hauv sib piv, unsaturated fatty acids tej zaum yuav mono unsaturated, uas muaj xws li txiv roj roj thiab canola roj, los yog poly unsaturated, uas muaj xws li pob kws roj thiab soya taum roj, tag nrho cov uas yog cov nroj tsuag qhov chaw, tshwj xeeb tshaj yog cov txiv maj phaub roj thiab xibtes roj uas muaj feem ntau. saturated fatty acids.
Feem ntau, unsaturated fatty acids yog kua nyob rau hauv chav tsev kub thaum lub saturated fatty acids nyob twj ywm. Cov cuab yeej no yog siv nyob rau hauv ntau txoj kev lag luam xws li hauv kev tsim cov margarine txawm tias nws yog los ntawm cov zaub ntshiab; nws raug rau ntau qib ntawm hydration lossis saturation kom nws ruaj khov thiab ruaj khov raws li kev sib kis.
Ntau qhov kev tshawb fawb tau pom tias lawv tsis muaj lub siab noj qab haus huv thiab tuaj yeem ua rau muaj cov roj cholesterol ntau dua li cov lipoproteins tsawg. Yog li ntawd, cov hom phiaj kev noj haus tau teem tseg kom txo tau cov roj noj rau 30% ntawm tag nrho cov calories, tshwj xeeb tshaj yog txo cov roj saturated.
Qhov sib txawv ntawm Fat thiab Saturated Fat yog dab tsi?
• Saturated fat yog ib pawg ntawm pawg loj ntawm fatty acids.
• Hauv cov roj saturated, cov pa roj carbon atoms tag nrho nrog hydrogen atoms thiab tsis muaj ob daim ntawv cog lus nyob rau hauv nruab nrab ntawm carbon atoms, thaum lub unsaturated fatty acid muaj ob daim ntawv cog lus.
• Lub hauv paus tseem ceeb ntawm cov roj saturated yog tsiaj cov khoom, thiab cov roj tsis muaj roj yog cov khoom cog nrog qee qhov kev zam.
• Cov roj saturated tseem nyob hauv chav sov thaum cov roj tsis muaj roj tsis txaus yog cov kua dej hauv chav sov.
• Saturated fatty acids tau pom tias ua rau muaj kev pheej hmoo ntawm cov kab mob plawv vim li no tau qhia kom txo qis kev noj haus.
