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Eggs Flashcards

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1
Q

Organic eggs meaning

A

Hens raised without growth hormones, antibiotics. The feed has no artificial pesticides or fertilisers

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2
Q

Free-range eggs meaning

A

Hens are free to roam around, not caged

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3
Q

Battery eggs

A

Hens lay eggs in an enclosed cage

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4
Q

Chalazae

A

A structure within eggs to hold the yoke in place

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5
Q

Lecithin

A

A natural emulsifier found in egg yokes

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6
Q

Albumin

A

A water-soluble protein found in eggs

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7
Q

Define coagulation

A

Egg proteins set due to heating.

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8
Q

What temperature do egg whites coagulate at?

A

60C

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9
Q

What temperature do egg yokes coagulate at?

A

68C

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10
Q

Outline the effect of coagulation on the protein chains of eggs

A

Coagulation causes the protein chains to untwist and straighten out and bond together around small pockets of water.

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11
Q

Practical application of coagulation in Clarification

A

Egg whites are whisked into clear soups, any solid particles in the soup become entrapped in the coagulated egg white. the soup is strained, and the egg white and particles are removed resulting in a clear soup.

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12
Q

Define aeration

A

Air bubbles are formed from whisking the egg whites. During whisking enough heat is generated to coagulate the egg protein forming a bubble of egg white around the air. Cook to set

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13
Q

Practical application of aeration

A

aerated desserts such as meringues and soufflés

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14
Q

What is pasteurisation of eggs?

A

Heat treatment to ensure eggs for commercial use are free from salmonella and other pathogenic bacteria

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15
Q

Describe the composition of the shell of an egg

A

10% of the total egg
composed of calcium carbonate
porous
lined with a membrane

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16
Q

describe the composition of the egg white

A

60% of the total egg
jelly-like liquid
contains B vitamins
also contains minerals such as calcium, phosphorous, zinc and selenium
contains proteins such as ovalbumin and globulin

17
Q

describe the composition of the egg yolk

A

30% of the total egg
held in place by chalazae
leicithin
saturated fat and cholesterol
contains vitamins such as A&D
contains minerals such as calcium, phosphorous, zinc, iron and selenium
contains proteins such as livetin and vitellin

18
Q

list the proteins in eggs

A

livetin
vitellin
ovalbumin
globulin

19
Q

what does EQAS stand for?

A

Egg Quality Assurance Scheme

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