ACIDES GRAS Flashcards by Amandine Dattignie

Q

Molécule dérivé de

A

d’hydrocarbure

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Q

Niveau oxydation

A

très faible

Composé réduit en comparaison avec les protéines ou les glucides

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Q

Partie polaire

A

Groupement carboxylique

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Q

partie non polaire

A

chaine carbonée

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Q

Conformation majoritaire des acides gras insaturé

A

Cis

angle de 120°

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Q

Solubilité eau diminue quand nb de carbone

A

augmente

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Q

Solubilité eau diminue quand nb doubles liaison

A

augmente

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Q

Solubilité dans eau

A

très faible à ph physiologique grâce groupement COO-

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Q

Solubilité acide laurique

A

0,063 mg/g d’eau

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Q

Solubilité glucose

A

1 100mg/g d’eau

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Q

Point de fusion diminue quand nb de carbone

A

diminue

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Q

Point de fusion diminue quand nb double liaison

A

augmente

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Q

Acide laurique

A

C12: 0

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Q

Acide palmique

A

C16: 0

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Q

Acide stéarique

A

C18: 0

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Q

Acide oléique

A

C18: 1 ▵9

Famille w9

Q

Acide linolénique

A

C18: 2 ▵9,12

Famille w6

Q

Acide linolénique

A

C18: 3 ▵9,12,15

Famille w3

Q

Acide arachidonique

A

C20: 4 ▵5,8,11,14

Famille w6

Q

Synthèse acide oléique à partir

A

acide stéarique

Q

Synthèse acide arachidonique à partir

A

acide linoléique

Q

Acide gras essentiel

A

AG w6 sauf acide arachodonique
AG w3
non synthétisante par organisme