when does the hard calcium shell form around the egg
Eggshell The fibrous chicken shell membranes are added in the proximal (white) isthmus of the oviduct.[1] In the distal (red) isthmus mammillae or mammillary knobs are deposited on the surface of the outer membrane in a regular array pattern.[7][8] The mammillae are proteoglycan-rich and are thought to control calcification. In the shell gland (similar to a mammalian uterus), mineralization starts at the mammillae. The shell gland fluid contains very high levels of calcium and hydrogen carbonate. The thick calcified layer of the eggshell forms in columns from the mammillae structures, and is known as the palisade layer. Between these palisade columns are narrow pores that traverse the eggshell and allow gaseous exchange. The cuticle forms the final, outer layer of the eggshell.[9]
Buttermilk pie Buttermilk pie is a custard-like pie. Originally from the United Kingdom, it is now a traditional pie of the southern United States.[1] It is similar to, and sometimes confused with, chess pie but it does not include cornmeal. The basic filling consists of a mixture of sugar, butter, eggs, buttermilk and wheat flour. Variations on the recipe may include flavorings such as vanilla, lemon zest and nutmeg. Buttermilk pies are made with a pie crust. The filling is poured into the crust and baked until the mixture sets. The pie is best eaten at room temperature after being allowed to cool, but may be eaten either warm from the oven or after being chilled.