Qhov sib txawv tseem ceeb ntawm fatty cawv fatty acid thiab fatty ester yog tias fatty alcohols muaj ib pab pawg neeg haus cawv ua haujlwm thiab fatty acids muaj cov pab pawg neeg carboxylic acid ua haujlwm, hos fatty esters muaj ester functional pawg nyob qhov twg hauv lub molecule.
Fatty alcohol feem ntau yog qhov hnyav molecular, ncaj-chain thawj cawv tau los ntawm cov rog thiab roj. Fatty acids yog carboxylic acids uas muaj ntev aliphatic carbon chains uas yog saturated los yog unsaturated. Ntxiv mus, fatty esters los yog fatty acid esters yog ib hom esters tsim los ntawm kev sib xyaw ntawm fatty acid nrog cawv.
Fatty Alcohol yog dab tsi?
Fatty alcohol feem ntau yog qhov hnyav molecular, ncaj-chain thawj cawv tau los ntawm cov rog thiab roj. Cov saw ntev ntawm cov roj cawv sib txawv nrog rau qhov chaw. Qee qhov kev lag luam tseem ceeb roj cawv muaj xws li lauryl, stearyl, thiab oleyl cawv. Cov dej cawv muaj roj no yog cov kua dej tsis muaj xim lossis cov khoom siv quav ciab uas yuav tshwm sim xim daj yog tias muaj cov impurities. Feem ntau, tus naj npawb ntawm cov pa roj carbon atom hauv cov dej cawv fatty yog tus lej sib npaug. Feem ntau, nws muaj ib pawg cawv uas txuas rau lub davhlau ya nyob twg carbon atom.
Daim duab 01: Cov Qauv Tshuaj ntawm Cov Dej Haus Dej Haus
Qee cov cawv muaj roj tsis txaus, thaum lwm tus yog cov qauv tsim. Cov rog rog no tseem ceeb heev hauv kev lag luam. Zoo ib yam li fatty acids, fatty alcohols feem ntau raug xa mus rau generic nrog cov naj npawb ntawm carbon atoms nyob rau hauv lub molecule, xws li. C-12 cawv muaj 12 carbon atoms.
Fatty Acid yog dab tsi?
Fatty acids yog carboxylic acids uas muaj aliphatic carbon chains ntev uas yog saturated los yog unsaturated. Qhov no txhais tau tias cov saw hlau aliphatic yuav lossis tsis muaj ob daim ntawv cog lus ntawm cov pa roj carbon atoms. Cis thiab trans fatty acids yog ob hom ntawm unsaturated fatty acids.
Cis fatty acids yog carboxylic acids uas muaj aliphatic carbon chains ntev uas muaj ob lub hydrogen atoms txuas rau ob daim ntawv cog lus nyob rau tib sab ntawm cov pa roj carbon. Peb lub npe no yog "cis configuration ntawm unsaturated fatty acids."
Vim tias hydrogen atoms nyob rau tib sab ntawm cov saw hlau, nws ua rau cov saw hlau khoov. Qhov no txwv qhov kev ywj pheej conformational ntawm fatty acid. Yog hais tias muaj ntau ob daim ntawv cog lus nyob rau hauv cov saw, nws txo qhov yooj ntawm cov saw. Ntxiv mus, yog hais tias muaj ntau cis configurations nyob rau hauv cov pa roj carbon saw, nws ua rau cov saw heev nkhaus nyob rau hauv nws cov feem ntau yooj yim conformations. Piv txwv xws li cis-oleic acid thiab cis-linoleic acid.
Trans fatty acids yog carboxylic acids uas muaj cov roj carbon aliphatic ntev ntev uas muaj ob lub hydrogen atoms txuas rau ob daim ntawv cog lus ntawm ob sab ntawm cov saw hlau. Qhov no tsis ua rau cov saw hlau yuav khoov ntau. Ntxiv mus, lawv cov duab zoo ib yam li ncaj saturated fatty acids. Trans fatty acids tsis yog ntau ntau nyob rau hauv cov xwm li cis configuration. Nws yog tsim los ntawm kev lag luam ntau lawm. Piv txwv li, cov tshuaj tiv thaiv hydrogenation yuav ua rau tsim cov roj ntsha trans fatty acids.
Fatty Ester yog dab tsi?
Fatty esters lossis fatty acid esters yog hom ester uas tsim los ntawm kev sib xyaw ntawm fatty acid nrog cawv. Yog tias cov dej cawv siv ntawm no yog glycerol, ces cov fatty acid esters uas tau tsim tuaj yeem hu ua monoglyceride, diglyceride, lossis triglyceride raws li cov qauv. Chemically, noj cov rog yog triglycerides.
Daim duab 02: Fatty Ester Molecule
Feem ntau, fatty esters yog cov tsis muaj xim; Txawm li cas los xij, qee zaum, lawv tshwm daj lossis xim av yog tias tus qauv yog degraded. Tsis tas li ntawd, triglycerides tshwm sim ua hmoov, flakes, coarse hmoov, thiab granular los yog waxy lumps, roj, los yog kua. Cov tshuaj no yuav luag tsis muaj ntxhiab.
Qhov txawv ntawm Fatty Alcohol Fatty Acid thiab Fatty Ester yog dab tsi?
Fatty alcohol feem ntau yog qhov hnyav molecular, ncaj-chain thawj cawv tau los ntawm cov rog thiab roj. Fatty acids yog carboxylic acids uas muaj ntev aliphatic carbon chains uas yog saturated los yog unsaturated, thaum fatty esters los yog fatty acid esters yog ib hom ester uas los ntawm kev sib xyaw ntawm fatty acid nrog cawv. Qhov sib txawv tseem ceeb ntawm fatty cawv fatty acid thiab fatty esters yog tias fatty alcohols muaj ib pab pawg neeg haus cawv ua haujlwm thiab fatty acids muaj ib pawg carboxylic acid ua haujlwm, whereas fatty esters muaj ester functional pawg nyob txhua qhov chaw hauv molecule.
Cov hauv qab no qhia txog qhov sib txawv ntawm fatty cawv fatty acid thiab fatty ester nyob rau hauv daim ntawv tabular rau ib sab sib piv.
Summary – Fatty Alcohol vs Fatty Acid vs Fatty Ester
Fatty alcohols, fatty acids, thiab fatty esters yog ib qho tseem ceeb lipid compounds. Qhov sib txawv tseem ceeb ntawm fatty cawv fatty acid thiab fatty esters yog tias fatty alcohols muaj ib pab pawg neeg haus cawv ua haujlwm thiab fatty acids muaj ib pawg carboxylic acid ua haujlwm, whereas fatty esters muaj ester functional pawg nyob txhua qhov chaw hauv molecule.
