By Prof. Dr. Roland Glaser (auth.)

ISBN-10: 364208639X

ISBN-13: 9783642086397

ISBN-10: 3662044943

ISBN-13: 9783662044940

The message of this publication is that biophysics is the technology of actual ideas underlying the "phenomenon lifestyles" on all degrees of association. instead of instructing "physics for biologists" or "physical tools utilized to biology", it regards its topic as an outlined self-discipline with its personal community of principles and ways. The publication begins via explaining molecular buildings of organic structures, different types of atomic, molecular and ionic interactions, events, strength move, self association of supramolecular buildings and dynamic homes of organic membranes. It then is going directly to introduce the organic organism as a non-equilibrium procedure, sooner than treating thermodynamic recommendations of osmotic and electrolyte equilibria in addition to currents and strength profiles. It keeps with issues of environmental biophysics and such clinical elements because the impression of electromagnetic fields or radiation on residing structures and the biophysics of listening to and noice defense. The publication concludes with a dialogue of method analyses, together with types of neural procedures in addition to of ecological interactions, progress, differentiation and evolution.

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Example text

1 Thermodynamic Probability and Entropy In 1854, Rudolf J. E. 3 Thermal Molecular Movement, Order and Probability 27 system in a reversible way in relation to the temperature [see Eq. 10)]. Later, in 1894, Ludwig Boltzmann used this parameter in the framework of statistical thermodynamics. In this context, entropy and the second principle of thermodynamics become more imaginable. e. of missing order. The correlation between order and probability and, as will be explained later information - is of great importance for the understanding of the principles of biological organization.

3). Equilibrium structures, such as inorganic salt crystals with a very primitive geometry, become very complex and variable in shape, when based on the sophisticated pattern of the primary structure of bio-macromolecules rather than on the relatively simple field of interaction of spherico-symmetric ions. The spontaneous folding of proteins and their arrangement to supramolecular structures, such as complex enzyme systems of even ribosomes, must be viewed in this way. Such processes are also referred to as self assembly.

Does it mean that the information concept is not applicable to biological systems at all? In fact, there is no reason for scepticism. Consequently, a distinction has to be made between a syntactic measure of information, and a semantic measure. The syntactic information content of a DNA molecule, as calculated above, provides some information on the maximum storage capacity of the genome. The amount of information actually stored is even lower, if the redundance in the storage of genetic information which is required for the protection of the information is taken into account.

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