This survey was written at the invitation of the Editors of the "Ergebnisse der Physiologie". Its aim is to present the more recent progress in the know ledge of biological energy transformations. Since it was intended for a review journal, the reader was taken to be familiar with the fundamentals of current biochemistry, as described in the standard textbooks. It was not the object to compile an extensive collection of facts. The survey is limited to aspects of wider interest, and the main emphasis has been on the general unifying principles which emerge from the great mass of detailed ob servations. The article is reprinted in the hope that it may be useful in this form to advanced students and research workers in biochemistry and related subjects. H. A. KREBS H. L. KORNBERG 2 Table of Contents Page 1. The Key Position of Adenosine Triphosphate . . . 213 2. The Three Phases of Foodstuff Degradation. . . . 213 3. The Energy-Yielding Steps of Intermediary Metabolism 215 4. The Build-up of Phosphate Bond Energy ..... 221 5. Alternative Pathways of Anaerobic Fermentation in Micro-organisms. 227 6. Alternative Pathways of Glucose Oxidation . 237 7. The Path of Carbon in Photosynthesis . . . 243 8. Utilization of Energy for Chemical Syntheses 249 9. Control of Energy-Supplying Processes . . . 262 10. A Special Feature of ATP as an Energy Store. 271 11. Evolution of Energy Transforming Mechanisms 273 Appendix by K. BURTON Free Energy Data of Biological Interest 27S References . . . . . . . . . . . . . . .

The first comprehensive general resource on state-of-the-art protocell research, describing current approaches to making new forms of life from scratch in the laboratory. Protocells offers a comprehensive resource on current attempts to create simple forms of life from scratch in the laboratory. These minimal versions of cells, known as protocells, are entities with lifelike properties created from nonliving materials, and the book provides in-depth investigations of processes at the interface between nonliving and living matter. Chapters by experts in the field put this state-of-the-art research in the context of theory, laboratory work, and computer simulations on the components and properties of protocells. The book also provides perspectives on research in related areas and such broader societal issues as commercial applications and ethical considerations. The book covers all major scientific approaches to creating minimal life, both in the laboratory and in simulation. It emphasizes the bottom-up view of physicists, chemists, and material scientists but also includes the molecular biologists' top-down approach and the origin-of-life perspective. The capacity to engineer living technology could have an enormous socioeconomic impact and could bring both good and ill. Protocells promises to be the essential reference for research on bottom-up assembly of life and living technology for years to come. It is written to be both resource and inspiration for scientists working in this exciting and important field and a definitive text for the interested layman.

"This is the first book to provide a comprehensive overview of the conservation of biological materials used in contemporary art"--

Have you ever seen a magician make something disappear and question if anything could really just vanish? Do you know why the periodic table is set up the way it is? From Lavoisier and Joule to Dalton and Mendeleyev, take a look at the basic principles of matter and thermodynamics in a fun and exciting way.

"Vladimir Vernadsky was a brilliant and prescient scholar-a true scientific visionary who saw the deep connections between life on Earth and the rest of the planet and understood the profound implications for life as a cosmic phenomenon." -DAVID H. GRINSPOON, AUTHOR OF VENUS REVEALED "The Biosphere should be required reading for all entry level students in earth and planetary sciences." -ERIC D. SCHNEIDER, AUTHOR OF INTO THE COOL: THE NEW THERMODYNAMICS OF CREATIVE DESTRUCTION

This innovative volume is the first to address the conservation of contemporary art incorporating biological materials such as plants, foods, bodily fluids, or genetically engineered organisms. Eggshells, flowers, onion peels, sponge cake, dried bread, breast milk, bacteria, living organisms—these are just a few of the biological materials that contemporary artists are using to make art. But how can works made from such perishable ingredients be preserved? And what logistical, ethical, and conceptual dilemmas might be posed by doing so? Because they are prone to rapid decay, even complete disappearance, biological materials used in art pose a range of unique conservation challenges. This groundbreaking book probes the issues associated with displaying, collecting, and preserving these unique works of art. The twenty-four papers from the conference present a range of case studies, prominently featuring artists’ perspectives, as well as conceptual discussions, thereby affording a comprehensive and richly detailed overview of current thinking and practices on this topic. Living Matter is the first publication to explore broadly the role of biological materials in the creative process and present a variety of possible approaches to their preservation. The free online edition of this open-access publication is available at www.getty.edu/publications/living-matter/ and includes videos and zoomable illustrations. Also available are free PDF, EPUB, and Kindle/MOBI downloads of the book.

"What did the "Negro problem," as it was called at the turn of the twentieth century, look like? Autumn Womack's study examines efforts to visualize Black social life through new technologies and disciplines-from photography and film to statistics-in the decades between 1880 and 1930. Womack describes nothing less than a "racial data revolution," one in which social scientists, reformers, and theorists rendered Black life an inanimate object of inquiry. At the very same time, Black cultural producers staged their own kind of revolution, undisciplining racial data in ways that challenged normative visual regimes and capturing the dynamism of Black social life. Womack focuses on figures like W.E.B DuBois, Kelly Miller, Sutton Griggs, and Zora Neale Hurston, as well as lesser-known editors, social reformers, and performers. She shows how they harnessed media as diverse as the social survey, the novel, the stage, and early motion pictures to reform visual practices and recalibrate the relationship between data and black life"--