Read e-book online Allgemeine Physiologie der Pflanzenzelle / General PDF

By H. J. Bogen (auth.), Dr. med. Günther F. Bahr, Dr. Hans J. Bogen, Dr. Leo Brauner, Professor Dr. Erwin Bünning, Professor Dr. T. Caspersson, Professor Dr. phil. Runar Collander, Dr. H. B. Currier, Professor Dr. Horst Drawert, Professor Dr. Franz Duspiva,

ISBN-10: 3642946763

ISBN-13: 9783642946769

ISBN-10: 3642946771

ISBN-13: 9783642946776

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Extra info for Allgemeine Physiologie der Pflanzenzelle / General Physiology of the Plant Cell

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Long range forces will accomplish more. The total force with which a particle, consisting of many molecules, will act on a second particle may be ascertained by integrating over the first sphere and arriving at the reaction between this sphere and a molecule in the second sphere. In a similar manner may one integrate the molecules in the second sphere and thus arrive at the final total reaction. range molecular forces may build up to appreciably strong long-range forces. OVERBEEK (1948) has recently made direct measurements of the molecular attraction between parallel glass plates at distances of the order of the wave-length of visible light (5000 A).

Cytol. et BioI. veget. 14, 31 (1953). , and N. KAMIYA: Electrical response of a slime mold. ) 39, 333 (1950). : Quelques observations de bioelectricite cellulaire. J. of Physiol. 4/), 232 (1953). : Theorie der Narkose. Pflugers Arch. 1/)3, 276 (1913). VERWEY, E. J. , and J. TH. G. OVERBEEK: Theory of the stability of lyophobic colloids. 1948. : Physikalische Chemie der Zellatmung. Biochem. Z. 119, 134 (1921). WYK, A. J. A. VAN DER, and K. H. MEYER: Molecular processes during deformation of rubber-like elastic bodies.

Most biologists are aware of this distinction. Words of caution and a new method of approach are welcome, but one should not fear hypotheses. Data without theory are sterile. RASHEVSKY (1944) calls attention to biological speculations on the mechanism of cell division. He shows, by mathematical analysis, that certain theories are not valid. "-In the first place, the electric charge hypotheses of many biologic phenomena are at best only tentative, and often wholly unwarranted. But cells certainly possess a charge, which functions biologically, a fact one can hardly escape, but no biologist seriously regards cell division as due to this charge.

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Allgemeine Physiologie der Pflanzenzelle / General Physiology of the Plant Cell by H. J. Bogen (auth.), Dr. med. Günther F. Bahr, Dr. Hans J. Bogen, Dr. Leo Brauner, Professor Dr. Erwin Bünning, Professor Dr. T. Caspersson, Professor Dr. phil. Runar Collander, Dr. H. B. Currier, Professor Dr. Horst Drawert, Professor Dr. Franz Duspiva,


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