Document Detail


Physical bases for a triad of biological similarity theories.
MedLine Citation:
PMID:  3448994     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The dimensional analysis of physics, based on the MLT-system (M = mass, L = length, T = time), can be applied to the living world, from mycoplasmas (10(-13) g) to the blue whales (10(8) g). Body mass (M), or body weight (W), are utilized as convenient reference systems, since they represent the integrated masses of all elementary particles--at the atomic level--which conform an organism. A triad of biological similarities (mechanical, biological, transport) have been previously described. Each similarity was based on two postulates, of which the first was common to all three, i.e., the constancy of body density; whereas the second postulates were specific for each of the three theories. In this study a physical foundation for these second postulates, based on three universal constants of nature, is presented, these are: 1) the acceleration of gravity (g = LT-2); 2) the velocity of light (c = LT-1); and 3) the mass-specific quantum (h/m = L2T-1). The realm of each of these biological similarities is the following: 1) the gravitational or mechanical similarity (where g = constant), deals mainly with the relationship between a whole organism and its environment, particularly with locomotion. The acceleration of gravity (g) is also one of the determining factors of the "potential" energy (E = m.g.H), where m is the mass, and H is the height above the reference level; 2) the electrodynamic similarity (formerly biological similarity), (c = constant), is able to quantitatively define the internal organization of an organism from both a morphological and a physiological point of view.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
B Gunther; E Morgado
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Archivos de biología y medicina experimentales     Volume:  19     ISSN:  0004-0533     ISO Abbreviation:  Arch. Biol. Med. Exp.     Publication Date:  1986 Jan 
Date Detail:
Created Date:  1988-06-01     Completed Date:  1988-06-01     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0321546     Medline TA:  Arch Biol Med Exp (Santiago)     Country:  CHILE    
Other Details:
Languages:  eng     Pagination:  67-75     Citation Subset:  IM; S    
Affiliation:
Departamento de Ciencias Fisiológicas, Facultad de Ciencias Biológicas y de Recursos Naturales, Universidad de Concepción, Chile.
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MeSH Terms
Descriptor/Qualifier:
Biological Transport
Biomechanics
Biophysical Phenomena
Biophysics*
Gravitation
Light
Models, Biological*

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