Abstract
IN his contribution to the ” First Report on Viscosity and Plasticity”, H. J. Jordan1 has quoted only the measurements by W. Seifriz on protoplasm in 1924. But L. V. Heilbrunn does not find any conclusive evidence for elastic behaviour, apart from those cases where definite fibrillar elements can be observed in the protoplasm. In some recent papers, I have demonstrated the anomalous flow of protoplasm2 and determined certain values interpreted as moduli of dilatability, transversal contraction and gliding3. Both the anomalous behaviour of protoplasm under varied shearing stresses and its elasticity are dependent on a structural organization of protoplasm not with respect to its grosser parts such as the nucleus, but in regard to the actual chemical molecules of which it consists4. So the next task was to find any substantial evidence for fibrillar or linear units within the protoplasm submitted to a stress along a definite axis.
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References
H. J. Jordan, First Report on Viscosity and Plasticity, p. 214, 221 (Amsterdam: Noord-Hollandsche Uitg.-Maatsch., 1935).
H. H. Pfeiffer, Physics, 7, 302 (1936).
Pfeiffer, Cytologia, 6, 329 (1935). Protoplasma, 26, 372 (1936).
W. Seifriz, Protoplasm, 246, 261. (New York and London: McGraw-Hill, 1936.)
H. Pfeiffer, Protoplasma, 23, 210 (1935).
H. Pfeiffer, Trans. Faraday Soc., 29, 822, 833 (1930).
H. Pfeiffer, Festschr. K. Fujii, in the press (Tokyo, 1937).
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PFEIFFER, H. Evidence for Linear Units within Protoplasm. Nature 138, 1054 (1936). https://doi.org/10.1038/1381054a0
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DOI: https://doi.org/10.1038/1381054a0
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