Qhov sib txawv tseem ceeb ntawm stearic acid thiab oleic acid yog tias stearic acid yog ib qho saturated compound, thaum oleic acid yog ib qho tsis txaus ntseeg.
Stearic acid thiab oleic acid yog cov organic tebchaw muaj cov saw hlau. Cov no tau muab cais ua cov fatty acids raws li lawv cov qauv tshuaj.
Stearic Acid yog dab tsi?
Stearic acid yog cov organic compound uas muaj cov tshuaj formula C17H35CO2 H. Nws yog saturated fatty acid uas muaj cov saw hlau nrog 18 carbon atoms. Lub npe IUPAC ntawm cov tshuaj no yog octadecanoic acid. Cov kua qaub no zoo li cov khoom siv dawb. Cov ntsev thiab lwm yam derivatives ntawm stearic acid yog hu ua stearates. Cov kua qaub no muaj cov ntxhiab tsw ntxhiab tsw.
Peb tuaj yeem tau txais stearic acid los ntawm saponification ntawm cov rog thiab roj. Muaj cov triglycerides nyob rau hauv cov rog thiab roj tau saponification nyob rau hauv lub xub ntiag ntawm dej kub. Lub resulting compound sib tov yuav tsum tau distilled kom tau ntshiab acid. Txawm li cas los xij, cov khoom lag luam muaj stearic acid yog qhov sib xyaw ntawm stearic acid thiab palmitic acid.
Daim duab 01: Cov qauv tshuaj ntawm Stearic Acid
Thaum hais txog kev siv cov tshuaj stearic acid, nws yog ib qho tseem ceeb raws li ib tug surfactant thiab ua ib tug softening neeg sawv cev vim muaj ib tug polar taub hau pab pawg neeg uas tau mus txuas rau hlau cations. Nws kuj tseem muaj cov saw hlau uas tsis muaj polar uas ua rau nws tuaj yeem yaj hauv cov kuab tshuaj organic.
YOleic Acid yog dab tsi?
Oleic acid yog cis isomer ntawm fatty acid, muaj cov tshuaj formula C18H34O2Nws yog cis isomer ntawm elaidic acid. Cov khoom no tshwm sim raws li cov kua roj oily uas tsis muaj xim thiab tsis muaj ntxhiab tsw. Txawm li cas los xij, kev lag luam muaj cov qauv ntawm oleic acid tuaj yeem ua daj. Peb tuaj yeem faib cov oleic acid ua monounsaturated omega-9 fatty acid. Cov molar loj ntawm cov tshuaj no yog 282.046 g / mol. Nws muaj qhov qis melting point (13 Celsius) thiab qhov sib piv ntawm qhov kub kub (360 Celsius). Cov khoom no yog insoluble nyob rau hauv dej, thiab nws yog soluble nyob rau hauv organic solvents xws li ethanol.
Daim duab 02: Cov qauv tshuaj ntawm Oleic Acid
Lub npe ntawm cov tshuaj no los ntawm lo lus Latin "oleum", uas txhais tau tias roj lossis oily. Oleic acid yog qhov feem ntau tshwm sim ntawm fatty acid. Muaj ntsev thiab esters ntawm oleic acid npe hu ua oleates. Feem ntau, peb tuaj yeem pom oleic acid hauv nws daim ntawv ester es tsis yog hauv cov kab mob lom. Cov tshuaj no feem ntau tshwm sim hauv daim ntawv ntawm triglyceride. Cov sib xyaw ua ke, suav nrog phospholipids hauv cov cell membranes, cov roj cholesterol esters, thiab cov esters wax, muaj oleic acid Cheebtsam.
Oleic acid cov ntaub ntawv los ntawm biosynthesis, uas koom nrog cov haujlwm enzymatic ntawm stearoyl-CoA9-desaturase ua rau stearoyl-CoA. Ntawm no, stearic acid yog dehydrogenated los ua monounsaturated derivative, oleic acid.
Qhov txawv ntawm Stearic Acid thiab Oleic Acid yog dab tsi?
Qhov sib txawv tseem ceeb ntawm stearic acid thiab oleic acid yog tias stearic acid yog ib qho saturated compound, thaum oleic acid yog ib qho tsis muaj kuab lom. Ntxiv mus, stearic acid tsis muaj ob los yog triple bonds ntawm carbon atoms nyob rau hauv cov carbon saw, whereas oleic acid muaj ob daim ntawv cog lus nyob rau hauv nruab nrab ntawm nws cov nonpolar carbon saw.
Cov hauv qab no infographic tabulates ntau qhov sib txawv ntawm stearic acid thiab oleic acid.
Summary – Stearic Acid vs Oleic Acid
Hauv luv luv, stearic acid thiab oleic acid yog cov organic acidic compounds. Qhov sib txawv tseem ceeb ntawm stearic acid thiab oleic acid yog tias stearic acid yog ib qho saturated compound, thaum oleic acid yog ib qho tsis txaus ntseeg.
