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EGGS:
Nature's MRE or Culinary Time-
Bomb?
(The Effect of Aging on the Culinary
Functionality of the Chicken Egg)
by Sydney Bouldin
Central Magnet School
May 1st
, 2013
Overview

2 functions for eggs:
− biological
− culinary

bacterial contamination is inhibited

as egg ages, internal composition
changes

2 functions for eggs:
− biological
− culinary

bacterial contamination is inhibited

as egg ages, internal composition
changes
Composition

shell
− pores
− membranes

yolk
− water
− lecithin

albumen
− water
− thick/thin

shell
− pores
− membranes

yolk
− water
− lecithin

albumen
− water
− thick/thin
Design of Study

3 separate tests to measure quality
of:
− yolk: mayonnaise
− albumen: angel cake
− whole egg: sponge cake

numerical measurements of quality
− haugh index
− yolk index
− air cell size

3 separate tests to measure quality
of:
− yolk: mayonnaise
− albumen: angel cake
− whole egg: sponge cake

numerical measurements of quality
− haugh index
− yolk index
− air cell size
Previous Research

“no marked decrease in quality”

“angel cake volumes decreased”

“sponge cake volumes remained
relatively consistent”

“no marked decrease in quality”

“angel cake volumes decreased”

“sponge cake volumes remained
relatively consistent”
Conclusions

test of method

recommended storage time

implications:
− in the home
− in a professional kitchen
− for the USDA

test of method

recommended storage time

implications:
− in the home
− in a professional kitchen
− for the USDA

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egg functionality

  • 1. EGGS: Nature's MRE or Culinary Time- Bomb? (The Effect of Aging on the Culinary Functionality of the Chicken Egg) by Sydney Bouldin Central Magnet School May 1st , 2013
  • 2. Overview  2 functions for eggs: − biological − culinary  bacterial contamination is inhibited  as egg ages, internal composition changes  2 functions for eggs: − biological − culinary  bacterial contamination is inhibited  as egg ages, internal composition changes
  • 3. Composition  shell − pores − membranes  yolk − water − lecithin  albumen − water − thick/thin  shell − pores − membranes  yolk − water − lecithin  albumen − water − thick/thin
  • 4. Design of Study  3 separate tests to measure quality of: − yolk: mayonnaise − albumen: angel cake − whole egg: sponge cake  numerical measurements of quality − haugh index − yolk index − air cell size  3 separate tests to measure quality of: − yolk: mayonnaise − albumen: angel cake − whole egg: sponge cake  numerical measurements of quality − haugh index − yolk index − air cell size
  • 5. Previous Research  “no marked decrease in quality”  “angel cake volumes decreased”  “sponge cake volumes remained relatively consistent”  “no marked decrease in quality”  “angel cake volumes decreased”  “sponge cake volumes remained relatively consistent”
  • 6.
  • 7.
  • 8. Conclusions  test of method  recommended storage time  implications: − in the home − in a professional kitchen − for the USDA  test of method  recommended storage time  implications: − in the home − in a professional kitchen − for the USDA

Editor's Notes

  1. Examine how freshness affects reliability in a recipe Topic has been examined with varying results
  2. Use of fridges has reduced need for very fresh eggs Measure to what extent this change in composition affects the usefulness in the kitchen