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MASNE KISJELINE
Masne kisjeline su najvazniji sastojci slozenih lipida.
VISEMASNE KISJELINE
Glavne zasicene i nezasicene masne kisjeline u lipidima su:
-palmitinska 16 C atoma CH3(CH2)14COOH
-stearinska 18 C atoma CH3(CH2)16COOH
NEZASICENE MASNE KISJELINE
-oleinska CH3(CH2)7CH=CH(CH2)7COOH
-linolna 18 C atoma , (9,12, dvostruka veza) CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOH
-linoleinska 18 C atoma , (9,12,15 dvostruka veza)
CH3CH2CH=CHCH2CH=CHCH2CH=CH(CH2)7COOH
 Nezasicenih masnih kisjelina ima u biljakma.Sisari ne mogu sintetizovati
nezasicene masne kisjeline sa 2 ili vise dvostrukih veza.Ove se kisjeline
moraju unositi hranom i nazivaju se esencijalne masne kisjeline.Esencijalne
masne kisjeline(mogu se sintetizovati u organizmu) su polazni proizvodi
neophodnni za razne sinteze.
 Arahidonska kisjelina je polazni proizvod za sintezu prostagladina.
FIZICKE I HEMIJSKE OSOBINE MASNIH KISJELINA
Masne kisjeline su : - slabe kisjeline
-grade soli I estre
-nezasicene kisjeline daju karak . reakcije ,adiraju Br i H
-rastvaraju s u alkalijama ,gradeci sapune
TRIACILGLICEROL
Po hemijskomsastavuto suestri polihidroksilnihalkoholai masnihkisjelina.
CH2 – OH R1 COOH CH2OCOR1
CH- OH + R2COOH → CH2OCOR2 + 3 H2O
CH2 – OH R3COOH CH2OCOR3
GLICEROL TRIACILGLICEROL
Triacilglicceroli mogu biti prosti i slozeni.Prosti triacilglicerolisukadajezastupljena
jednavrsta masnihkisjelina.Slozeni triacilgliceroli sukada suzastupljenerazlicitemasne
kisjeline.
Tecni triacilgliceroli kadausastav strukture ulazenezasicenemasnekisjeline,acvrsti kada
u strukturi zastupljenezasicenemasnekisjeline. Pretezno sucvrtsi triacilgliceroli
zivotinjskogporijekla,doksutecni odbiljnog,razlicitaulja.
Triacilgliceroli mogudahidrolizuju.Kadareagujusavodom,triacilgliceroli se razlazudo
visihmasnihkisjelinaIglicerola.Kadareagujusabazama( BAZNAHIDROLIZA) –
SAPONIFIKACIJA.Zagrijavanjemsabazamatriacilgliceroli serazlazu,oslobadjaseglicerolI
gradealkalnesoli masnihkisjelina -SAPUNE.
CH2 – OH CH2OH R1COONA
CH- OH + NaOH → CHOH + R2COONA → SMJESAVISIHMASNIHKISJ
CH2 – OH CH2OH R3COONa
Sapuni – Eliminisuprljavstinu..Izgradjeni suodjednogdijelakoji serasvarauvodi (polarni
dio)I dijelakoji senerastvara u vodi ( nepolarni).Taj nepolarni dio vezemasnoceI
prljavstinu.
Masne kisjeline

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Masne kisjeline

  • 1. MASNE KISJELINE Masne kisjeline su najvazniji sastojci slozenih lipida. VISEMASNE KISJELINE Glavne zasicene i nezasicene masne kisjeline u lipidima su: -palmitinska 16 C atoma CH3(CH2)14COOH -stearinska 18 C atoma CH3(CH2)16COOH NEZASICENE MASNE KISJELINE -oleinska CH3(CH2)7CH=CH(CH2)7COOH -linolna 18 C atoma , (9,12, dvostruka veza) CH3(CH2)4CH=CHCH2CH=CH(CH2)7COOH -linoleinska 18 C atoma , (9,12,15 dvostruka veza) CH3CH2CH=CHCH2CH=CHCH2CH=CH(CH2)7COOH  Nezasicenih masnih kisjelina ima u biljakma.Sisari ne mogu sintetizovati nezasicene masne kisjeline sa 2 ili vise dvostrukih veza.Ove se kisjeline moraju unositi hranom i nazivaju se esencijalne masne kisjeline.Esencijalne masne kisjeline(mogu se sintetizovati u organizmu) su polazni proizvodi neophodnni za razne sinteze.  Arahidonska kisjelina je polazni proizvod za sintezu prostagladina. FIZICKE I HEMIJSKE OSOBINE MASNIH KISJELINA Masne kisjeline su : - slabe kisjeline -grade soli I estre -nezasicene kisjeline daju karak . reakcije ,adiraju Br i H -rastvaraju s u alkalijama ,gradeci sapune
  • 2. TRIACILGLICEROL Po hemijskomsastavuto suestri polihidroksilnihalkoholai masnihkisjelina. CH2 – OH R1 COOH CH2OCOR1 CH- OH + R2COOH → CH2OCOR2 + 3 H2O CH2 – OH R3COOH CH2OCOR3 GLICEROL TRIACILGLICEROL Triacilglicceroli mogu biti prosti i slozeni.Prosti triacilglicerolisukadajezastupljena jednavrsta masnihkisjelina.Slozeni triacilgliceroli sukada suzastupljenerazlicitemasne kisjeline. Tecni triacilgliceroli kadausastav strukture ulazenezasicenemasnekisjeline,acvrsti kada u strukturi zastupljenezasicenemasnekisjeline. Pretezno sucvrtsi triacilgliceroli zivotinjskogporijekla,doksutecni odbiljnog,razlicitaulja. Triacilgliceroli mogudahidrolizuju.Kadareagujusavodom,triacilgliceroli se razlazudo visihmasnihkisjelinaIglicerola.Kadareagujusabazama( BAZNAHIDROLIZA) – SAPONIFIKACIJA.Zagrijavanjemsabazamatriacilgliceroli serazlazu,oslobadjaseglicerolI gradealkalnesoli masnihkisjelina -SAPUNE. CH2 – OH CH2OH R1COONA CH- OH + NaOH → CHOH + R2COONA → SMJESAVISIHMASNIHKISJ CH2 – OH CH2OH R3COONa Sapuni – Eliminisuprljavstinu..Izgradjeni suodjednogdijelakoji serasvarauvodi (polarni dio)I dijelakoji senerastvara u vodi ( nepolarni).Taj nepolarni dio vezemasnoceI prljavstinu.