Abstract
The charges in live cells interact with or produce electric fields, which results in enormous dielectric responses, flexoelectricity, and related phenomena. Here we report on a contraction of Schizosaccharomyces pombe (fission yeast) cells induced by magnetic fields, as observed using a phase-sensitive projection imaging technique. Unlike electric fields, magnetic fields only act on moving charges. The observed behavior is therefore quite remarkable, and may result from a contractile Lorentz force acting on diamagnetic screening currents. This would indicate extremely high intracellular charge mobilities. Besides, we observed a large electro-optic response from fission yeast cells.
[1] G.A. Morton and E.G. Ramberg: “Point projector electromicroscope”, Phys. Rev., Vol. 56, (1939), p. 705. http://dx.doi.org/10.1103/PhysRev.56.70510.1103/PhysRev.56.705Search in Google Scholar
[2] E.W. Müller: “Field Ionization and Field Ion Microscopy”, Advances in Electronics and Electron Physics, Vol. 13, (1960), pp. 83–179. Search in Google Scholar
[3] H.-W. Fink, W. Stocker and H. Schmid: “Holography with low energy electrons”, Phys. Rev. Lett., Vol. 65, (1990), pp. 1204–1206. http://dx.doi.org/10.1103/PhysRevLett.65.120410.1103/PhysRevLett.65.1204Search in Google Scholar
[4] V.T. Binh and V. Semet: “Low energy—electron diffraction by nano—objects in projection microscopy without magnetic shielding”, Appl. Phys. Lett., Vol. 65, (1994), pp. 2493–2495. http://dx.doi.org/10.1063/1.11264810.1063/1.112648Search in Google Scholar
[5] Ch. Adessi, M. Devel, V.T. Binh, Ph. Lambin and V. Meunier: “Influence of structural defects on Fresnel projection microscope images of carbon nanotubes: Implications for the characterization of nanoscale devices”, Phys. Rev. B, Vol. 61, (2000), pp. 13385–13389. http://dx.doi.org/10.1103/PhysRevB.61.R1338510.1103/PhysRevB.61.R13385Search in Google Scholar
[6] D. Gabor: “A New Microscopic Principle”, Nature, Vol. 161, (1948), pp. 777–778. Search in Google Scholar
[7] E. Hecht and A. Zajac: Optics, 2nd Ed., Addison-Wesley, Menlo Park, California, 1975. 10.1063/1.3068822Search in Google Scholar
[8] A. Mayer: “Electronic diffraction tomography by Green’s functions and by singular value decompositions”, Phys. Rev. B, Vol. 63, (2001), pp. 035408–035413. http://dx.doi.org/10.1103/PhysRevB.63.03540810.1103/PhysRevB.63.035408Search in Google Scholar
[9] H.J. Kreuzer, K. Nakamura, A. Wierzbicki, H.-W. Fink andH. Schmid: “Theory of the Point Source Electron Microscope”, Ultramicroscopy, Vol. 45, (1992), pp. 381–403. http://dx.doi.org/10.1016/0304-3991(92)90150-I10.1016/0304-3991(92)90150-ISearch in Google Scholar
[10] J.B. Tiller, A. Barty, D. Paganin and K.A. Nugent: “The Holographic twin image problem: a Deterministic phase solution”, Optics Communications, Vol. 183, (2000), pp. 7–14. http://dx.doi.org/10.1016/S0030-4018(00)00852-X10.1016/S0030-4018(00)00852-XSearch in Google Scholar
[11] J.R. Broach, J.R. Pringle and E.W. Jones: The Molecular and Cellular Biology of the Yeast Saccharomyces, Cold Spring Harbor Laboratory Press, 1991. Search in Google Scholar
[12] C. Prodan and E. Prodan: “The dielectric behaviour of living cell suspensions”, J. Phys. D: Appl. Phys., Vol. 32, (1999), pp. 335–343. http://dx.doi.org/10.1088/0022-3727/32/3/02210.1088/0022-3727/32/3/022Search in Google Scholar
[13] H. Fröhlich: “Long Range Coherence and Energy Storage in Biological Systems”, Int. J. Quant. Chem., Vol. II, (1968), pp. 641–649. http://dx.doi.org/10.1002/qua.56002050510.1002/qua.560020505Search in Google Scholar
[14] H. Fröhlich: “Long Range Coherence and the Action of Enzymes”, Nature, Vol. 228, (1970), p. 1093. http://dx.doi.org/10.1038/2281093a010.1038/2281093a0Search in Google Scholar PubMed
[15] H. Fröhlich: “The extraordinary dielectric properties of biological materials and the action of enzymes”, Proc. Natl. Acad. Sci. USA, Vol. 72, (1975), pp. 4211–4215. http://dx.doi.org/10.1073/pnas.72.11.421110.1073/pnas.72.11.4211Search in Google Scholar PubMed PubMed Central
[16] H. Fröhlich: “Coherent excitations in active biological systems”, In: F. Guttman and H. Keyzer (Eds.): Modern Biochemistry, Plenum Press, New York, 1986. Search in Google Scholar
[17] N.E. Mavromatos andD.V. Nanopoulos: “Quantum Brain?”, Int. J. Mod. Phys. B12, (1998), pp. 517–542. http://dx.doi.org/10.1142/S021797929800032610.1142/S0217979298000326Search in Google Scholar
[18] B. Julsgaard, A. Kozhekin andE.S. Polzik: “Experimental long—lived entanglement of two macroscopic objects”, Nature, Vol. 413, (2001), pp. 400–403. http://dx.doi.org/10.1038/3509652410.1038/35096524Search in Google Scholar PubMed
[19] E. Altewischer, M.P. van Exter andJ.P. Woerdman: “Plasmon—assisted transmission of entangled photons”, Nature, Vol. 418, (2002), pp. 304–306. http://dx.doi.org/10.1038/nature0086910.1038/nature00869Search in Google Scholar PubMed
[20] W. Barnes: “Survival of the entanglement”, Nature, Vol. 418, (2002), pp. 281–282. http://dx.doi.org/10.1038/418281a10.1038/418281aSearch in Google Scholar PubMed
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