By R. Rappaport (auth.), Nuri Akkaş (eds.)
Cytomechanics is the applying of the classical ideas of mechanics in telephone biology. it's an utilized technology inquisitive about the outline and evaluate of mechanical houses of cells and their organelles in addition to of the forces exerted by way of them. therefore, this subject wishes a really interdisciplinary strategy, and for that reason this quantity supplies an updated account of the present study performed on mobile department, mitosis, cytokinesis, mobile locomotion and mobile deformation in the course of general improvement and the cytoskeletal position in phone form. Biologists, biomechanicians, biophysicists, biochemists and biomathematicians right here speak about the fundamental ideas of mechanics and thermodynamics, emphasizing their applicability to phone activities.
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Extra info for Biomechanics of Active Movement and Deformation of Cells
Left, dots indicate astral centers. The astral centers are closer to the equatorial surface than they are to the polar surfaces. Right, hooks removed~ furrow completed. Reproduced by permission from the Journal of Experimental Zoology 227:247-253 copyright 1983 Alan R. Liss Inc. In the polar relaxation hypothesis the fact that the centers of the asters in a normal spherical cell are closer to the polar surfaces than to the equatorial surface is assumed to be critical. If the intensity of stimulation were to decrease as a power function of the distance from the astral center and if the cell shape is limited to certain configurations, then the stimulation at the poles exceeds that at the equator Borisy, 1983).
Redrawn from McIntosh and McDonald, 1989. 37 or pole, of the spindle. " This process of congress ion usually requires many minutes. " Metaphase ends and "anaphase" begins with the separation of the two chromatids of each chromosome, so that each may move towards the spindle pole it faces. " Late in anaphase, the chromosomes contract and nuclear envelopes begin to reform around the compacted chromatin mass. " During mitosis many normal cellular events cease or slow, and the cell changes its structure in a dramatic way.
When measurements are made on the same furrow at successively shorter lengths during the course significantly different of division, (Rappaport, 1977) are not During division, the values the physical property of the furrow region is that of a viscoelastic material (Hiramoto, 1970) The measurement method just described can be used to demonstrate that the functional life of the contractile mechanism is prolonged when completion of division is blocked. When the measurement is made on one of the blastomeres resulting from the first cleavage, control.