Biology in Physics: Is Life Matter? (Polymers, Interfaces by Konstantin Bogdanov

By Konstantin Bogdanov

Biology in Physics is an intensive new e-book which bridges the space among biology and physics. the purpose is to advertise an interdisciplinary alternate of clinical details and ideas, for you to stimulate cooperation in study. The scope of this quantity explores either the recommendations and methods of biophysics and illustrates the newest advances in our knowing of some of the particular mechanisms which are utilized by residing organisms. This quantity represents a different attempt to compile the knowledge that may enable a nonbiologically orientated physicist to understand the $64000 function that physics performs in lifestyles sciences. Key positive aspects* An creation to biophysics for non-specialist* Covers the entire very important topices in sleek biophysics* Takes account of the newest info rising from biophysical initiatives* studies on novel healing concepts* provides an advanced-level evaluation of mechanisms that keep watch over numerous tactics in organisms starting from bacterial to whales

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The wall of the aorta, as well as the walls of all other arteries, is highly elastic: its Young's modulus is 105times smaller than that of metals. Therefore, when blood enters the aorta, the latter starts expanding until the blood inflow stops. After this, the elasticity of the expanded aorta wall, seeking to bring the aorta back to its initial dimensions, squeezes the blood out into the artery section, more distant from the heart (the reverse flow is hindered by the aortic valve of the heart).

1 V appears at the beginning of a fiber, then at the distance 2 the voltage on a membrane would still exceed the resting potential by 30 mV, and a nerve impulse appears here as well; the same process takes place in the next segment of a fiber, and so on. Therefore, the propagation of an impulse along a nerve fiber can be compared with flame spreading along Bickford's fuse; but it should be noted that with the former the required energy is supplied by the difference of concentration of potassium and sodium ions on each side of the membrane, whereas with the latter, it is supplied by the quick burning of easily inflammable insulation of the fuse.

As a result the number of erythrocytes in the blood of these patients is lowered, and they suffer from anemia. A great number of people become deaf with age. Although only about 12% of the total adult population experience this gradual advent of deafness, its true cause could not be identified for a long time. It was only in the 1980s that scientists' attention was drawn to unusual properties of erythrocytes in deaf people. This conclusion was reached while measuring the viscosity of blood in normal and deaf patients with rotational viscosimeters, which make it possible to examine the dependence of the viscosity of blood on a velocity gradient (rate of shear).

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