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  • 1
    Electronic Resource
    Electronic Resource
    X-ray scattering by partially disordered membrane systems (1978)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 34 (1978), S. 751-753 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A method of analysing the X-ray diagrams of imperfect membrane lattices with degrees of stacking disorder between 2 and 6% is presented. The method is, however, generally applicable to partially disordered lattices of centrosymmetric membranes. This can also be extended to the case of asymmetric membranes occurring in one orientation only, or in pairs, back-to-back. The procedure allows the determination of the statistical quantities characteristic of the partially disordered lattices and the separation of the diffuse scattering component. As a direct consequence, the refinement of membrane electron density projections becomes feasible and an example is presented for erythrocyte membrane lattices. A one-dimensional model of the refined electron density profile of the erythrocyte membrane is used to calculate numerically the X-ray scattering for a partially disordered lattice of N membrane units. A residual of 15% is obtained with this model and the difference between the observed and calculated values can be minimized further with the proposed refinement procedure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739478001540
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  • 2
    Electronic Resource
    Electronic Resource
    Relation Between Oxygen-17 NMR and Rheological Characteristics of Wheat Flour Suspensions (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 50 (1985), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Water binding has a significant influence on the rheological properties of wheat flour suspensions. Wheat flour-water suspensions at concentrations from 60 - 95% wet basis were subjected to rheological and NMR analyses in order to ascertain the relation between the two methods. The rheological data obtained by the Haake RV-3 Rotoviscometer followed the Power Law, thus comparisons were based on consistency coefficient (a) and flow behavior (b) values. The NMR spectrometer measured oxygen-17 relaxation rates (34 MHz in water and in deuterium oxide) as an indication of water mobility. The data showed a general inverse relationship between consistency coefficient and water mobility. However, the data indicated three distinct regions, each showing a linear relation with water mobility decreasing as apparent viscosity increased.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1985.tb13032.x
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  • 3
    Electronic Resource
    Electronic Resource
    Some algebraic properties of (M, R)-systems
    Amsterdam : Elsevier
    Bulletin of Mathematical Biology 35 (1973), S. 213-217 
    Details
    ISSN: 0092-8240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0092-8240(73)80021-7
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Some algebraic properties of (M, R)-systems
    Amsterdam : Elsevier
    Bulletin of Mathematical Biology 35 (1973), S. 213-217 
    Details
    ISSN: 0092-8240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0092-8240(73)90021-9
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Some algebraic properties of (M, R)-systems
    Amsterdam : Elsevier
    Bulletin of Mathematical Biology 35 (1973), S. 213-217 
    Details
    ISSN: 0092-8240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0092-8240(73)80021-7
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    On adjoint dynamical systems
    Amsterdam : Elsevier
    Bulletin of Mathematical Biology 35 (1973), S. 475-486 
    Details
    ISSN: 0092-8240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0092-8240(73)80047-3
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    On adjoint dynamical systems
    Amsterdam : Elsevier
    Bulletin of Mathematical Biology 35 (1973), S. 475-486 
    Details
    ISSN: 0092-8240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0092-8240(73)80047-3
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Organismic supercategories and qualitative dynamics of systems (1971)
    Springer
    Bulletin of mathematical biology 33 (1971), S. 339-354 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The representation of biological systems by means of organismic supercategories, developed in previous papers (Bull. Math. Biophysics,30, 625–636;31, 59–71;32, 539–561), is further discussed. The different approaches to relational biology, developed by Rashevsky, Rosen and by Băianu and Marinescu, are compared with Qualitative Dynamics of Systems which was initiated by Henri Poincaré (1881). On the basis of this comparison some concrete result concerning dynamics of genetic system, development, fertilization, regeneration, analogies, and oncogenesis are derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02476778
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  • 9
    Electronic Resource
    Electronic Resource
    A logical model of genetic activities in Lukasiewicz algebras: The non-linear theory (1977)
    Springer
    Bulletin of mathematical biology 39 (1977), S. 249-258 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A categorical framework for logical models of functional genetic systems is proposed. The logical models of genetic nets are shown to simulate non-linear systems withn-state components and allow for the generalization of previous logical models of neural nets. An algebraic formulation of variable ‘next-state functions’ is presented which can be used for the description of developmental processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02462863
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  • 10
    Electronic Resource
    Electronic Resource
    Organismic supercategories: I. Proposals for a general unitary theory of systems (1968)
    Springer
    Bulletin of mathematical biology 30 (1968), S. 625-635 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The present paper is an attempt to outline an abstract unitary theory of systems. In the introduction some of the previous abstract representations of systems are discussed. Also a possible connection of abstract representations of systems with a general theory of measure is proposed. Then follow some necessary definitions and authors' proposals for an axiomatic theory of systems. Finally some concrete examples are analyzed in the light of the proposed theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02476679
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