ANSC 3120 Lecture Notes - Inulin, Calorimeter, Indirect Calorimetry

• School: University of Guelph
• Department: Animal Science
• Course: ANSC 3120
• Professor: c

Document Summary

Sum of all chemical reactions involved in obtaining and spending food energy: eat to control energy intake, heat is released by burning substrates; it can be measured. 107 x the energy required to accelerate a mass of 1 g by 1 cm/s. 1 kcal = 4. 184 kj: don"t worry about j. Gaining total body energy: growth, pregnancy, obesity? negative energy balance. Heat of combustion (diet sample) = gross energy (ge) Ge of: fat: ~9. 4 kcal/g, protein: ~5. 65 kcal/g, cho: ~ 4. 15 kcal/g temp. Heat of combustion: chemical basis: why does fat provide more kcal per gram vs cho or protein, cho and protein are already partially oxidized compared to fat, cho, lipid. Co2 carbon dioxide not flammable. Energy content of urea: at water fuel value", ge and digestibility values represent weighted average in north american diet. Could differ between individuals: eg vegetarians might have decreased digestibility, variations exist within each macronutrient class, * diabetics will have a glucose value.