Musings of a Renaissance Man.

Carbon 6 Atom

Carbon 6 Atom by Bryan Brandenburg

Carbon 6 Atom

Carbon occurs in all organic life and is the basis of organic chemistry. This nonmetal also has the interesting chemical property of being able to bond with itself and a wide variety of other elements, forming nearly ten million known compounds. Read more

3D Neuron Field by Bryan Brandenburg

Neurobiology

The brain is composed of two broad classes of cells, neurons and glia, both of which contain several different cell types which perform different functions. Read more

Gulf War Syndrome

Gulf War Syndrome

In November of 2008, the Committee on Gulf War Veterans' Illnesses presented a 450 page report to Secretary of Veterans Affairs James Peake. Read more

Lionessess by Bryan Brandenburg

“Lionesses”

"Lionesses" by Bryan Brandenburg (3D Mixed Media) Read more

The Divine by Bryan Brandenburg

“The Divine”

"The Divine" by Bryan Brandenburg (3D Mixed Media) Read more

Energy Relationships Between Fuel and Food

Food Energy

The "Calorie" has become a common household term. Dietitians recommend, in cases of obesity, to reduce body weight by increasing exercise (energy expenditure) and reducing energy intake (consumption of food). Many governments require food manufacturers to label the energy content of their products, to help consumers control their energy intake. In Europe, manufacturers of prepackaged food must label the nutritional energy of their products in both kilocalories ("kcal") and kilojoules ("kJ"). In the United States, the equivalent mandatory labels display only "Calories" (when used with capitalized C, meaning kilocalories); an additional kilojoules figure is optional. The energy content of food is usually given on labels for 100 g and for a typical serving size.

The amount of food energy in a particular food could be measured by completely burning the dried food in a bomb calorimeter, a method known as direct calorimetry. However, the values given on food labels are not determined this way, because it overestimates the amount of energy that the human digestive system can extract, by also burning dietary fiber. Instead, standardized chemical tests and an analysis of the recipe are used to estimate the product's digestable constitutents (protein, carbohydrate, fat, etc.).

Oxidation and Food Energy
Food is oxidized after consumption. In oxidation by consumption, heat is released. Within the body, this heat is released as energy of metabolism. The rate of energy production is called the metabolic rate.

Other substances found in food (water, non-digestable fibre, minerals, vitamins) do not contribute to this calculated energy density.

Recommended daily energy intake values for young adults are: 2500 kcal/d (10 MJ/d, 120 W) for men and 2000 kcal/d (8 MJ/d, 100 W) for women. Children, sedentary and older people require less energy, physically active people more. The 100-120Watts is the average energy to power a human being at rest, equivalent to a 100-120 Watt light bulb.

Information Courtesy of Wikipedia Read more