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
Brie en Croute is French for Brie in a Crust.. To prepare Brie en Croute, roll out puff pastry or pie dough, lay a wheel of Brie Cheese in the center and fold up the edges to make a sealed parcel, then pop in a hot oven and bake at 325F for 10 to 15 minutes, until the dough browns.