Qhov sib txawv tseem ceeb ntawm cov rog rog thiab cov roj saturated yog cov rog trans yog hom roj tsis muaj roj uas muaj ob daim ntawv cog lus ntawm cov pa roj carbon molecules thaum cov roj saturated yog hom roj molecules uas tsis muaj ob daim ntawv cog lus ntawm cov pa roj carbon molecules.
Lipids lossis rog yog plaub pawg loj ntawm cov molecules uas muaj nyob hauv cov nroj tsuag thiab tsiaj txhu. Lawv yog cov tseem ceeb nyob rau hauv lub zog cia ntawm cov nroj tsuag thiab tsiaj lub cev. Ntxiv mus, calories uas peb tuaj yeem tau txais los ntawm 1g ntawm lipids yog siab dua li cov calories los ntawm 1g ntawm carbohydrates. Feem ntau, cov rog yog hydrophobic; Yog li ntawd, lawv yog cov dej insoluble. Txawm li cas los xij, lawv tuaj yeem muab rho tawm mus rau cov kuab tshuaj organic xws li ether, chloroform, thiab benzene. Lipid molecule yog ib tug fatty acid thiab cawv molecule. Fatty acids feem ntau muaj cov mis ntawm R-COOH, thiab R tej zaum yuav yog ib pawg hydrogen lossis alkyl xws li CH2, C2H5 thiab lwm yam. Fatty acids yuav muaj tus lej (14 txog 22) ntawm carbon atoms. Ib co fatty acid chains tuaj yeem muaj ob daim ntawv cog lus ntawm carbon atom; Raws li, muaj ob hom rog li unsaturated fats thiab saturated fats.
Trans Fat yog dab tsi?
Trans fats lossis trans fatty acids yog hom roj tsis txaus. Dehydrogenation yog txheej txheem uas yields cov rog trans. Nyob rau hauv lub xub ntiag ntawm ib tug catalyst thiab hydrogen gas, trans rog cov ntaub ntawv thaum cua sov cov kua zaub roj. Lub cis configuration ntawm ob daim ntawv cog lus nyob rau hauv fatty acids isomerizes rau hauv trans configuration los ntawm technological thiab microbiological cov tswv yim. Yog li, trans fatty acids yog unsaturated trans-isomer fatty acids. Cov no yog cov roj hydrogenated ib nrab, thiab lawv tsis tshua muaj kev lwj, yog li nws ua rau kom lub neej txee.
Daim duab 01: Khoom noj uas muaj Trans Fats
Hydrogenation hloov roj rau hauv lub xeev khov. Thaum ua zaub mov, tshwj xeeb tshaj yog nyob rau hauv cov khoom noj ceev, ib nrab hydrogenated rog tuaj yeem tsim. Tsis tas li ntawd, cov rog trans tuaj yeem tshwm sim hauv cov nqaij nyug rog thiab cov rog hauv cov ruminants hauv me me. Kev noj ntau ntawm cov roj trans rog yuav ua kom cov roj cholesterol hauv cov hlab ntsha. Yog li, cov roj ntsha trans tuaj yeem cuam tshuam kev noj qab haus huv ntau dua li cov roj saturated vim cov roj saturated nce LDL hauv cov ntshav thaum txo qis hauv High-Density Lipoprotein (HDL).
Saturated Fat yog dab tsi?
Cov roj ntsha saturated yog hom rog uas tsis muaj ob daim ntawv cog lus ntawm cov pa roj carbon atoms hauv cov roj fatty acids. Yog li, cov molecules no tau txo qis los yog saturated nrog hydrogen bonds. Biochemically, cov no yog cov molecules hloov tau yooj yim, uas tuaj yeem muaj ntau qhov sib txawv uas muaj kev sib hloov dawb nyob ib ncig ntawm C-C daim ntawv cog lus. Piv txwv ntawm saturated fatty acids yog Lauric acid, Myristic acid, Palmetic acids, thiab lwm yam.
Daim duab 02: Saturated fat – Palmitic Acid
Saturated fats muaj nyob rau hauv cov khoom tsiaj xws li nqaij, qe thiab khoom noj siv mis thiab hauv cov roj cog xws li txiv maj phaub roj, xibtes roj. Cov roj saturated nce qib Low-Density Lipoproteins (LDL) hauv cov hlab ntsha, uas nqa cov roj cholesterol los ntawm lub siab mus rau lwm lub cev. Yog li, kev noj cov roj saturated ua rau muaj ntau yam teeb meem kev noj qab haus huv nrog rau cov kab mob plawv.
Dab tsi yog qhov zoo sib xws ntawm Trans Fat thiab Saturated Fat?
- Ob leeg cov rog rog thiab cov rog saturated yog hom rog.
- Lawv yog cov rog noj.
- Kuj, ob leeg yog cov rog tsis zoo.
- Lawv tuaj yeem nce cov roj (cholesterol) phem.
- Tsis tas li ntawd, ob qho tib si tuaj yeem ua rau muaj kev pheej hmoo mob plawv thiab mob stroke.
- Lawv muaj nyob rau hauv chav sov.
Qhov txawv ntawm Trans Fat thiab Saturated Fat yog dab tsi?
Ob qho tib si cov rog rog thiab cov rog saturated yog cov rog tsis zoo. Qhov sib txawv tseem ceeb ntawm trans rog thiab saturated rog yog tias cov rog trans muaj ob daim ntawv cog lus ntawm carbon atoms ntawm lawv cov fatty acid chains thaum saturated fats tsis muaj ob daim ntawv cog lus. Trans fats yog cov rog phem tshaj plaws vim lawv ua rau muaj kab mob plawv, ntshav qab zib, thiab mob stroke. Saturated fats kuj ua rau muaj kab mob plawv thiab mob stroke. Txawm li cas los xij, cov rog trans tsis zoo dua li cov rog rog. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cov rog rog thiab cov roj saturated.
Tsis tas li ntawd, cov rog trans tuaj yeem tsim tau thaum ua zaub mov zoo li cov khoom noj ceev thaum cov roj saturated tsis tuaj yeem tsim los ntawm kev ua haujlwm zoo li no. Li no, qhov no kuj yog qhov sib txawv ntawm cov rog rog thiab cov roj saturated.
Hauv qab infographic qhia txog qhov sib txawv ntawm cov rog rog thiab cov rog saturated.
Summary – Trans Fat vs Saturated Fat
Muaj ob hom roj tseem ceeb li cov roj saturated fats thiab unsaturated fats. Unsaturated fats feem ntau suav hais tias yog cov rog zoo lossis rog rog. Txawm li cas los xij, cov roj trans fatty acids yog ib hom roj tsis muaj roj uas tsis zoo rau peb txoj kev noj qab haus huv. Cov roj saturated kuj tuaj nyob rau hauv cov rog tsis zoo vim lawv tuaj yeem txo cov roj (cholesterol) zoo thiab nce qib roj cholesterol hauv cov ntshav zoo ib yam li cov rog trans. Txawm li cas los xij, cov rog trans tsis zoo dua li cov rog rog. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm cov rog rog thiab cov rog saturated.
