CONTENTS 



PAGE 



INTRODUCTION. Bv Professor D. Noel Paton, M.D.. LL.D., 



F.R.S. . . ^ xvii 



PART I. SYSTEMATIC 

 SECTION I : ENERGETICS 



CHAP. 



I. LAWS OF ENERGY 1 



Definition of Biophysics, 1 ; of Laws, 1 and 2 ; of 

 Matter and of Energy, 3. Equivalent Units of Work, 4. 

 First Law of Thermodynamics, 4. Corollaries of First 

 Law, 5. Second Law of Thermodynamics, 6. States 

 of Energy, Potential and Kinetic, 6-8. Physiological 

 Availability of Energy, 9. Principle of Le Chatelier, 9. 

 Inertia, 10-13. 



II. THE STORAGE OF ENERGY 14 



Chlorophyll, 14. Grotthus' Law, 15. Synthesis of 

 Carbohydrate, 15-18 ; of Fats and Proteins, 19. 

 Absorption Spectra of Chlorophylls A and B, 20. 

 Catalyst for Photosynthesis, 21. 



III. LIBERATION OF ENERGY.— (1) CALORIMETRY . . 22 



Measurement of Energy in Calories, 22. E.V. of Foods 

 by Ultimate Analysis, 22-25 ; by Calorimeter, 25-27 ; 

 by Direct Animal Calorimetry, 27 ; by Indirect Calori- 

 metry, 28. Respiratory Quotient, 29. Hiberna- 

 tion,*30. 



IV. LIBERATION OF ENERGY.— (2) THE ANIMAL AS 

 MACHINE 31 



Comparative Thermal Efficiencies, 32. Animal not a 

 Heat Engine, 33. Energy Changes in Living Cell, 33. 



V. LIBERATION OF ENERGY.— (3) ENERGY OF SUB- 

 STANCE IN SOLUTION 35 



State of Matter in Solution, 35. Kinetic Theory, 35. 

 Newton's Law, 36. Boyle's Law and Charles' or Gay- 

 Lussacs' Law, 37. Evaluation of R in Gas Equation, 



37. Avogadro's Hypothesis, 37. Gaseous Diffusion, 



38. Osmosis, 40. Osmolar Concentrations, 41. 



VI. LIBERATION OF ENERGY.— (4) SURFACE ENERGY . 44 



Du Noviy's Torsion Balance, 45. Drop-weight Method, 

 45. Capillary Rise and Air Bubble Methods, 46. 

 Ageing of Sxu-faces, 46 . Temperature Coefficient, 46. 

 Orientation on Siu-faces. 47. Utilisation of Surface 



