fats and oils Flashcards

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1
Q

How many kcal per gram of fat

A

9

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2
Q

How many kcal per gram of alcohol

A

7

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3
Q

How many kcal per gram of protein

A

4

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4
Q

How many kcal per gram of carbs

A

4

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5
Q

What is a calorie

A

“amount of heat required to raise the
temp of 1g of water 1°C (from 14.5-15.5°C)”

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6
Q

kcal x ? = kJ

A

4.2

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7
Q

What is a triglyceride made up of

A

glycerol + 3x fatty acids

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8
Q

Is glycerol hydrophillic or hydrophobic

A

hydrophillic

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9
Q

are triglycerides hydrophillic or hydrophobic

A

hydrophobic

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10
Q

Is UFA most naturally occuring in cis or trans form

A

cis

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11
Q

two types of trans fatty acids (TFA)

A

Artificial TFA (industrial)
Natural TFA (ruminant)

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12
Q

C4:0

A

Butyric acid
Butanoic acid

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13
Q

C18:0

A

Stearic acid
Octadecanoic acid

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14
Q

C18:1 (cis 9)

A

Oleic acid
9-Octadecanoic acid

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15
Q

C18:2 n-6

A

Linoleic acid (LA)
9,12-Octadecadienoic acid

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16
Q

C18:3 n-3

A

α-Linolenic acid (ALA)
9,12,15-Octadecatrienoic acid

17
Q

Chemical reactions involving double bonds

A
  • Oxidation (indirectly via ROS) = off flavour
    – Hydrogenation (cis > trans)
    – Iodine binding for analysis