Source:- Google.com.pk
Cooking or cookery is the art of preparing food for consumption with the use of heat. Cooking techniques and ingredients vary widely across the world, reflecting unique environmental, economic, and cultural traditions and trends. The way that cooking takes place also depends on the skill and type of training an individual cook has. Cooking can also occur through chemical reactions without the presence of heat, most notably with Ceviche, a traditional South American dish where fish is cooked with the acids in lemon or lime juice. Sushi also uses a similar chemical reaction between fish and the acidic content of rice glazed with vinegar.
Chicken, pork and bacon-wrapped corn cooked in a barbecue smoker
Preparing food with heat or fire is an activity unique to humans, and scientists believe the advent of cooking played an important role in human evolution.[1] Most anthropologists believe that cooking fires first developed around 250,000 years ago. The expansion of agriculture, commerce, trade and transportation between civilizations in different regions offered cooks many new ingredients. New inventions and technologies, such as pottery for holding and boiling water, expanded cooking techniques. Some modern cooks apply advanced scientific techniques to food preparation.[2]There is no clear archeological evidence for when food was first cooked. Most anthropologists believe that cooking fires began only about 250,000 years ago, when hearths started appearing.[3] Phylogenetic analysis by Chris Organ, Charles Nunn, Zarin Machanda, and Richard Wrangham suggests that cooking may have been invented as far back as 1.8 million to 2.3 million years ago.[4]
Wrangham proposed that cooking was instrumental in human evolution, as it reduced the time required for foraging and led to an increase in brain size. He estimates the percentage decrease in gut size of early humans directly correlates to the increase in brain size.[5] Most other anthropologists, however, oppose Wrangham,[6] stating that archeological evidence suggests that cooking fires began in earnest only about 300,000 years ago,[7] when ancient hearths, earth ovens, burnt animal bones, and flint appear across Europe and the Middle East. Two million years ago, the only sign of fire is burnt earth with human remains, which most other anthropologists consider to be mere coincidence rather than evidence of intentional fire.[8] The mainstream view among anthropologists is that the increases in human brain size occurred well before the advent of cooking, due to a shift away from the consumption of nuts and berries to the consumption of meat.[9][10]
Food has become a part of material culture, and cuisine is much more than a substance. In the seventeenth and eighteenth centuries, food was a classic marker in Europe. However, in the nineteenth century, cuisine became a defining symbol of national identity. The discovery of the New World represented a major turning point in the history of food because of the movement of foods from and to Europe, such as potatoes, tomatoes, corn, yams, and beans. Food in America consisted of traditions that were adapted from England, but up until the end of this century, the presence of new ingredients along with the contact between diverse ethnic groups influenced experimentation. Industrialization was also a turning point that changed how food affected the nation.
During the period of industrialization, food began to be mass-produced, mass marketed, and standardized. Factories processed, preserved, canned, and packaged a wide variety of foods, and processed cereals quickly became a defining feature of the American breakfast.[11] In the twenties, freezing methods as well as the earliest cafeterias and fast food establishments emerged. This point in time is when processed and nationally distributed foods became a huge part of the nation's diet.
Along with changes in food, there have also been several changes in nutritional guidelines as well. Since 1916, there have been several different nutrition guidelines issued by the United States government, eventually leading up to the food pyramid.[12] In 1916, "Food For Young Children" along with its sequel for adults, "How to Select Foods" was the first USDA guide to give specific dietary guidelines. Updated in the 1920s to these guides gave shopping suggestions for different-sized families along with a Depression Era revision which included four cost levels. In 1943, the USDA created the "Basic Seven" chart to make sure that people got the recommended nutrients. It included the first-ever Recommended Daily Allowances from the National Academy of Sciences. In 1956, the "Essentials of an Adequate Diet" brought recommendations which cut seven down to four groups that school children would learn about for decades. In 1979, a guide called "Food" was published, which addressed the link between too much of certain foods and chronic diseases. This publication also added "fats, oils, and sweets" to the four basic food groups and cautioned moderation. In 1992, the food pyramid was debuted. The USDA introduced this, which represented proportions of foods in a balanced diet. In 2005, the pyramid got a makeover and was renamed MyPyramid. Lastly, in 2011, "MyPlate" came about.
Ingredients
Most ingredients in cooking are derived from living organisms. Vegetables, fruits, grains and nuts as well as herbs and spices come from plants, while meat, eggs, and dairy products come from animals. Mushrooms and the yeast used in baking are kinds of fungi. Cooks also use water and minerals such as salt. Cooks can also use wine or spirits.
Naturally occurring ingredients contain various amounts of molecules called proteins, carbohydrates and fats. They also contain water and minerals. Cooking involves a manipulation of the chemical properties of these molecules.Cooking dairy products may reduce a protective effect against colon cancer. Researchers at the University of Toronto suggest that ingesting uncooked or unpasteurized dairy products (see also Raw milk) may reduce the risk of colorectal cancer.[32] Mice and rats fed uncooked sucrose, casein, and beef tallow had one-third to one-fifth the incidence of microadenomas as the mice and rats fed the same ingredients cooked.[33][34] This claim, however, is contentious. According to the Food and Drug Administration of the United States, health benefits claimed by raw milk advocates do not exist. "The small quantities of antibodies in milk are not absorbed in the human intestinal tract," says Barbara Ingham, PhD, associate professor and extension food scientist at the University of Wisconsin-Madison. "There is no scientific evidence that raw milk contains an anti-arthritis factor or that it enhances resistance to other diseases."
Heating sugars with proteins or fats can produce Advanced glycation end products ("glycotoxins")These have been linked to ageing and health conditions such as diabetes and causing obesity.
Deep fried food in restaurants may contain high level of trans fat which is known to increase level of low-density lipoprotein that may increase risk of heart diseases and other conditions. However, many fast food chains have now switched to trans-fat-free alternatives for deep-frying
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
Easy Cooking Recipes Recipes for Kids in Urdu for Desserts for Dinner for Chicken with Ground Beef In Hindi for Cakes for Cookies Photos
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