In addition to your basal metabolic rate, two other factors determine how many calories your body burns each day: Food processing (thermogenesis). Digesting, absorbing, transporting and storing the food you consume also takes calories. This accounts for 100 to 800 of the calories used each day.
(August 2015). Denitrification is a microbially facilitated process of nitrate reduction (performed by a large group of heterotrophic facultative anaerobic bacteria) that may ultimately produce molecular nitrogen (N 2) through a series of intermediate gaseous nitrogen oxide products.enitrification takes place under special conditions in both terrestrial and marine ecosystems. In general, it occurs where oxygen, a more energetically favourable electron acceptor, is depleted, and bacteria respire nitrate as a substitute terminal electron acceptor.
There is a biochemistry term: Denaturation. It means de-naturing, making something natural un-natural. It is often used to describe what happens to food on a molecular level when heated. For instance this was taken from the Wikipedia page about Denaturation http://en.wikipedia.org/wiki/Denaturation_(biochemistry) Denaturation is a process in which proteins lose their function by the application of heat. If proteins in a living cell are denatured, this results in disruption of cell activity and possibly cell death. When food is cooked, some of its proteins become denatured.