Page 242 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Bomb calorimeter B. Direct calorimetry (Lavoisier)
4.2 kJ
heat
1LH 2 O Air
Ignition by Ice
1°C
Insulation
Insulation
H 2 O
Water
Experimental
Combustion animal Energy Metabolism and Calorimetry
chamber 334 kJ
O 2 O 2
thaw
Test 1L
substance of water
C. Oxidation of glucose: fuel value, CE and RQ

H 2 COH Energy
C O O 2 CO 2 H 2 O Plate 10.2
H OH
H + O 2 O 2 CO 2 CO 2 + H 2 O H 2 O
C OH H C
O 2 O 2 O 2 Decomposition CO 2 CO 2 CO 2 H 2 O H 2 O H 2 O
HO C C H (combustion)
H OH
Glucose O 2 CO 2 Water of
+ + oxidation
1mol = 180g 6mol = 134.4L 6mol 6mol
Energie
2827kJ

2827 : 180 2827 : 134.4 6 : 6 = 1.0
= 15.7kJ/g = 21kJ/L O 2
Respiratory quotient (RQ)
Fuel value Caloric equivalent (CE) for glucose
D. RQ and caloric equivalent relative to nutrient composition
Composition of foodstuffs:
Proteins (constant 12%)
Fats Carbohydrates
1.0
Respiratory 0.9
quotient
(RQ) 0.8
0.7
Caloric equivalent (CE) 229
19.7 20.1 20.5 20.9
kJ/L O 2
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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