Food preservation usually involves preventing the growth of bacteria, fungi (such as yeasts), or any other micro-organisms (although some methods work by introducing benign bacteria or fungi to the food), as well as retarding the oxidation of fats that cause rancidity. Food preservation can also include processes that inhibit visual deterioration, such as the enzymatic browning reaction in apples after they are cut, which can occur during food preparation.
Many processes designed to preserve food will involve a number of food preservation methods. Preserving fruit by turning it into jam, for example, involves boiling (to reduce the fruit’s moisture content and to kill bacteria, yeasts, etc.), sugaring (to prevent their re-growth) and sealing within an airtight jar (to prevent recontamination). There are many traditional methods of preserving food that limit the energy inputs and reduce carbon footprint.
Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin, and contains essential nutrients, such as carbohydrates, fats, proteins, vitamins, or minerals. The substance is ingested by an organism and assimilated by the organism's cells in an effort to produce energy, maintain life, or stimulate growth.
Historically, people secured food through two methods: hunting and gathering, and agriculture. Today, most of the food energy consumed by the world population is supplied by the food industry.
Food storage is both a traditional domestic skill and is important industrially. Food is stored by almost every human society and by many animals. Storing of food has several main purposes:
The domesticated turkey is a large poultry bird. The modern domesticated form descends from the wild turkey (Meleagris gallopavo), one of the two species of turkey (genus Meleagris). It was domesticated by the indigenous peoples of Mesoamerica at least 2,000 years ago, with the evidence pointing to what are today the central regions of Mexico.
Turkey meat is a popular form of poultry, and turkeys are raised throughout temperate parts of the world, partially because industrialized farming has made it very cheap for the amount of meat it produces. Female domesticated turkeys are referred to as hens and the chicks may be called poults or turkeylings. In the United States, the males are referred to as toms, while in Europe, males are stags. The average lifespan for a domesticated turkey is ten years.]citation needed[