1 â¢Mathematically, the half life of a first-order reaction is: ln [A]t = !kt [A]0 So, for t = t1/2 and [A]t = Â½ [A]0 1 [ A] 0 ln 1 = ! kt 1 ln 2 = ! kt 1 2 2 [ A] 0 2 ln 1 2 0.693  t1 2 2  = ! = k k â¢Note that the half-life of a first-order reaction is independent of the initial concentration of the reactant.
Brie (/briË/ ; [bÊi]) is a soft cow's milk cheese named after Brie, the French region from which it originated (roughly corresponding to the modern departement dÃ©partement Of-seine-Et). Marne it is pale in color with a slight grayish tinge under a rind of white. moldhe curd is obtained by adding rennet to raw milk and warming it to a maximum temperature of 37 Â°C (99 Â°F). The cheese is then cast into molds, sometimes with a traditional perforated ladle called a pelle a Ã . Brie the 20 (cm 8) in mold is filled with several thin layers of cheese and drained for approximately 18. hours
@vwiggins: maybe you should read how Brie, Camembert etc. are made, because GdD is actually right, the rind is composed of the same material (milk + bacteria + salt + rennet. Once coagulated it is put in molds and then sprayed with Penicillium).he rind of Brie cheese, as well as other soft cheeses like Camambert, Boursault, etc, are generally edible. There may be some types that aren't, but I haven't seen them. The rinds are simply dried, hardened outer layers of cheese that have come in contact with mould. So eat away.