egg quality assurance scheme
hens salmonella free , traceable,
approved by bord bia, eggs have QA
logo
Storage
Fridge, pointed end down,
away from strong smells, at
room temp. before use,
whites in container,yolks in
water
Testing for freshness-
water bowl -sink =fresh
properties
1. coagualation
white coagualates@ 60, yolk @-65 ;
protein denatures;
overcooking=curdling; food
application=- thicken custard, bind
burgers, coat fish with breadcrumbs
2.
emulsification
emulsifier lecithin in yolk keeps oil &
viinegar (water) together e..g
mayonnaise
3. Aeration
whicksin traps air bubbles; heat -=coagulation
around bubbles; heat sets; application-white
-meringue
nutritive value & compostion
calcium, iron,
phosphorous
13% HBV protein- white
=albumin,globulin;yolk =livetin, vitelin
yolk
No carbs
74% water
12% saturated fat in yolk in fine
emulsion due to lecithin;cholesterol
B2,B12 in white, ADEK in yolk
E.
dietetic value
HBV protein for growth in children. easily digested for
elderly, reduce if CHD as saturated fat & choleserol,
variety of uses, cheap, serve with carbs/vit c