xii CONTENTS 



Chap. 33, contd. PagE 



8. Induction in the Photoreduction by Algae 1374 



9. Induction in Hill Reaction 1375 



B. Fluorescence and Absorption Changes during the Induction Period 1375 



1. Fluorescence Induction Phenomena in Leaves, Algae, Chloro- 

 plasts and Chlorophyll Solutions 1375 



2. Influence of Different Factors on Fluorescence-Time Curves .. . 1382 



(a) Duration of Incubation 1382 



(b) Light Intensity 1386 



(c) Temperature 1390 



(d) Carbon Dioxide Concentration 1391 



(e) Poisons 1395 



(f ) Oxygen; Effects of Anaerobiosis 1399 



(g) Oxidants and Neutralizers 1404 



3. Changes in Absorption Spectrum during Induction 1406 



C. Interpretation of Induction Phenomena 1407 



1. Diffusion and Buffer Effects 1407 



2. Building Up of Intermediates 1408 



(a) Photochemical Intermediates 1409 



(b) Thermal Intermediates 1412 



3. Role of the Carbon Dioxide Acceptor in Induction 1413 



4. Inactivation of the Catalytic System as the Primary Cause of 

 Induction. Gaffron-Franck Theory of Induction 1419 



5. Role of Respiration in Induction Phenomena 1425 



6. Other Theories of Induction 1428 



Bibliography 1429 



Chap. 34. Time Effects. II. Photosynthesis in Intermittent Light 1433 



A. Alternating Light 1435 



1. Yield of Photosynthesis in Relation to Frequency of Alterna- 

 tions 1435 



2. Theoretical Discussion of the Effect of Alternating Light 1441 



B. Flashing Light 1447 



1. Intermittency Factor in Flashing Light 1447 



2. Maximum Flash Yield 1452 



3. Effect of Cyanide on Photosynthesis in Flashing Light 1455 



4. Influence of Temperature, Carbon Dioxide Concentration, Nar- 

 cotics and Ultraviolet Light on Flash Yield 1460 



5. Flash Yield in Heavy Water 1465 



6. Flashing Light Experiments Calling for Revision or Supple- 

 mentation of the Emerson-Arnold-Franck Mechanism 1467 



7. Hill Reaction in Flashing Light 1478 



8. Flashing-Light Experiments with Bacteria and Hydrogen- 

 Adapted Algae 1481 



Bibliography 1483 



PART FIVE— ADDENDA TO VOLUME I AND VOLUME II, PART 1 



Chap. 35. Photochemistry of Chlorophyll in vitro and in vivo 1487 



A. Photochemistry of Chlorophyll in Solution 1487 



1. Bleaching of Chlorophyll in Methanol 1487 



