Regular corn meal is a whole ground corn meal that is full fat and can become rancid because of the high oil content. It can be stored in a refrigerator or freezer up to 6 months and slightly less at ambient temperature. Bolted corn meal has had a portion of the bran and germ removed in the milling process. Because a portion of the germ remains, the remaining fat content can cause this product to become rancid. It can be stored in a refrigerator or freezer up to 8 months and slightly less at ambient temperatures. Degermed corn meal has had most of the germ and bran removed during the milling process. Degermed corn meal is lower in fat. It can be stored at a room temperature of less than 21Â°C (70Â°F) for 12 months. Storage time would be less when temperatures are more than 21Â°C (70Â°F). Unenriched corn meal contains no added vitamins or minerals. Enriched corn meal contains added vitamins and minerals. It is enriched with thiamin, riboflavin, niacin, folic acid, and iron in harmless and assimilable form. It may contain calcium and vitamin D in a harmless and assimilable form. Self-rising corn meal contains added leavening agents, which include baking soda, salt, and an acid-reacting phosphate. Cooking is the process of preparing food by applying heat, selecting, measuring and combining of ingredients in an ordered procedure for producing safe and edible food. The process encompasses a vast range of methods, tools and combinations of ingredients to alter the flavor, appearance, texture, or digestibility of food. Factors affecting the final outcome include the variability of ingredients, ambient conditions, tools, and the skill of the individual doing the actual cooking. The diversity of cooking worldwide is a reflection of the aesthetic, agricultural, economic, cultural, social and religious diversity throughout the nations, races, creeds and tribes across the globe. Applying heat to food usually, though not always, chemically transforms it, thus changing its flavor, texture, consistency, appearance, and nutritional properties. Methods of cooking that involve the boiling of liquid in a receptacle have been practised at least since the 10th millennium BC, with the introduction of pottery.