How does the pores affect the keeping qualities of the egg?
Microbiological contamination of the inside of the egg is greatly affected by the ability of the egg shell to stop the invasion of micro-organisms and bacteria from entering the egg through the shell’s pores.
What do the pores in an egg do?
When the eggs are laid by the mother they are warmer than the air, and as they cool the material inside the egg shrinks a little bit. The tiny pores in the shell allow the carbon dioxide to escape and fresh air to get in. The chicken egg has more than 7,000 pores in its shell to allow this to happen!
What are the factors that affect quality in eggs?
Egg shell quality may be affected by the strain and age of hen ; induced moult ; nutritional factors such as calcium, phosphorus, vitamins, water quality, non-starch polysaccharides, enzymes, contamination of feed ; general stress and heat stress ; disease, production system, or addition of proprietary products to the …
What other ways are used for judging quality of eggs?
Exterior egg quality is judged on the basis of texture, colour, shape, soundness and cleanliness according to USDA (2000) standards. The shell of each egg should be smooth, clean and free of cracks. The eggs should be uniform in colour, size and shape.
What should you look for when buying eggs?
What points should you consider when buying eggs?
- Always purchase eggs from a refrigerated case.
- Choose eggs with clean, uncracked shells.
- Don’t buy out-of-date eggs.
- Look for the USDA grade shield or mark.
- Choose the size most useful and economical for your lifestyle.
How can identify if the egg you bought in good quality?
A quick test for freshness is to check if the raw egg in the shell sinks in a basin of water. Fresh eggs stay at the bottom of the bowl while stale eggs stand on end or float because of the large air cell. Other factors such as a weak shell and fine cracks can also cause the egg to float.
What are the qualities of fresh eggs?
When broken out of the shell, good quality, fresh eggs display certain characteristics:
- The yolk is small and rounded and stands high in a thick, gel-like egg white which tends to stay compact rather than spread out over a wide area.
- The thick egg white becomes thin and runny.
What is the best quality of eggs to choose for salting?
A good quality salted egg should have a bright orange and firm yolk and a clear egg white (not cloudy or yellow) with no off smell.