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Unformatted text preview: need ! For further reading, see McGee ! Probably the best known are the
prostaglandins (seen in next slide) FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 Roles of fats Prostaglandins
! Energy source Texture
! ! Essential fatty acids ! Fat soluble vitamins: A, D, E, K
! FST10 ©GMS/GFR 2012 This topic is for nutrition classes…
FST10 ©GMS/GFR 2012 Roles of fats ! Energy source
Essential fatty acids
Fat soluble vitamins: A, D, E, K ! Roles of fats — Flavor Flavor and ﬂavorings !
! ! ! 1-Storage of ﬂavor compounds 3 effects follow on the next 3 slides…
FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 Roles of fats — Flavor
! Roles of fats — Flavor 1-Storage of ﬂavor compounds
2-Speciﬁc for a product ( e.g. butter ) !
! 1-Storage of ﬂavor compounds
2-Speciﬁc for a product ( e.g. butter )
3-Without fat - ﬂavor is a problem (“Ain!t Nothin!
good without the grease” - Tina Turner) ! FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 Roles of fats
! Roles of fats: heat transfer Energy source
! Fat soluble vitamins: A, D, E, K ! ! Adipose
Essential fatty acids
Flavor and ﬂavorings ! !
! Heat transfer ! FST10 ©GMS/GFR 2012 Large molecules
Can be heated
to very high
with hot fat is
FST10 ©GMS/GFR 2012 Fats, Double Bonds & Saturation
(everything you were afraid to ask)
! The world!s shortest (and oversimpliﬁed)
explanation of double bonds, saturation and
unsaturation follows ... HH HH HCCH HCCH HH
Double Bond Ethane
FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 See also McGee C-18 Fatty Acids
COOH 18:0 — Stearic Acid COOH 18:1 — Oleic Acid COOH 18:2 — Linoleic Acid COOH 18:3 — Linolenic Acid OMEGA numbers & saturation What’s with the OMEGA numbers?
! Nutritionists are interested in
the end of the molecule
farthest from the acid group ! So the “last carbon” is like
the last letter of the Greek
alphabet — $ ! They number in from the
(omega) end until they come
to the 1st double bond ! C-18 Fatty Acids Nutritionists are interested in
the proportions of the fatty
! COOH COOH COOH Saturated 18:2 — Linoleic Acid COOH Monounsaturated ! 18:1 — Oleic Acid Polyunsaturated ! 18:0 — Stearic Acid $9 18:3 — Linolenic Acid $6
$3 FST10 ©GMS/GFR 2012 OMEGA numbers & saturation
! FST10 ©GMS/GFR 2012 OMEGA numbers & saturation Nutritionists are
interested in the
proportions of the fatty
Saturated FST10 ©GMS/GFR 2012 FST10 ©GMS/GFR 2012 But we do need to know a little more about Fatty acid stuff — Too advanced for FST10
(Don’t write these down; these are just in case you
read something about them like the label below...)
! Chemists locate double bonds from
the acid end & use the Greek
symbol delta (%) ! Some biochemists & nutritionists
use lower case “n” instead of $;
well sort of... ! Things like ALA are different from
GLA ! There are weird th...
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This note was uploaded on 09/28/2012 for the course FST 10 taught by Professor Jack during the Spring '08 term at UC Davis.
- Spring '08