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  • 11
    Electronic Resource
    Electronic Resource
    How did they all get that way? (1988)
    [s.l.] : Nature Publishing Group
    Nature 331 (1988), S. 26-26 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] EVERY now and then one comes across something different and what a blessing it is. This book is overtly about silicon, its chemistry and physics, and yet it is about something quite other. It is almost an autobiography. Professor Rochow wants to educate us in a gentle way about silicones and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/331026a0
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  • 12
    Electronic Resource
    Electronic Resource
    The political scientist (1989)
    [s.l.] : Nature Publishing Group
    Nature 342 (1989), S. 135-136 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] LINUS Pauling is a tragic hero of the scientific age. His work on chemical bonding and secondary protein structure, amongst other contributions, means he ranks as a very great scientist. His coupling of the scientific analysis of nuclear reactions with pleas for political wisdom in the testing of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/342135a0
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  • 13
    Electronic Resource
    Electronic Resource
    Inside trading (1989)
    [s.l.] : Nature Publishing Group
    Nature 341 (1989), S. 354-354 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The technique was developed many years ago now, but naturally enough in a NMR .BIOMEDICINE rough and ready way. As the editor of the journal says in his introduction, "the field has undergone enormous expansion and great hopes and expectations rest on it". There is a sense of suspended ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/341354b0
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  • 14
    Electronic Resource
    Electronic Resource
    Phospholipid vesicles as a model system for biomineralization (1986)
    [s.l.] : Nature Publishing Group
    Nature 324 (1986), S. 565-567 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Figure 1 illustrates the general reaction scheme adopted in our work. Unilamellar phospholipid vesicles with diameters of 300 A were prepared from phosphatidylcholine (17 mM) sus pensions at 4 C in the presence of Fe(ii) and/or Fe(iii) solutions. Three preparative routes were investigated: ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/324565a0
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  • 15
    Electronic Resource
    Electronic Resource
    Energizing protons in membranes (1989)
    [s.l.] : Nature Publishing Group
    Nature 338 (1989), S. 709-710 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN 1961, two proposals were made as to the way in which electron-transfer reactions of the cytochrome chain á€" the chain used in the oxidation of NADH by molecular dioxygen á€" could be connected to ATP formation without the intervention of chemical ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/338709a0
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  • 16
    Electronic Resource
    Electronic Resource
    A boundary property of semimartingale reflecting Brownian motions (1988)
    Springer
    Probability theory and related fields 77 (1988), S. 87-97 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary We consider a class of reflecting Brownian motions on the non-negative orthant inR K . In the interior of the orthant, such a process behaves like Brownian motion with a constant covariance matrix and drift vector. At each of the (K-1)-dimensional faces that form the boundary of the orthant, the process reflects instantaneously in a direction that is constant over the face. We give a necessary condition for the process to have a certain semimartingale decomposition, and then show that the boundary processes appearing in this decomposition do not charge the set of times that the process is at the intersection of two or more faces. This boundary property plays an essential role in the derivation (performed in a separate work) of an analytical characterization of the stationary distributions of such semimartingale reflecting Brownian motions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01848132
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  • 17
    Electronic Resource
    Electronic Resource
    Reflected brownian motion in a wedge: Semimartingale property (1985)
    Springer
    Probability theory and related fields 69 (1985), S. 161-176 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, the object of study is reflected Brownian motion in a two-dimensional wedge with constant direction of reflection on each side of the wedge. The basic question considered here is “When is this process a semimartingale?”. It is first shown that a related process, defined by specifying the corner of the wedge to be an absorbing state, rather than an instantaneous one, is a semimartingale. Conditions for the existence and uniqueness of the process for which the corner is an instantaneous state were given by Vardhan and Williams (“Brownian motion in a wedge with oblique reflection”, Comm. Pure Appl. Math., to appear). Under these conditions, it is shown that starting away from the corner, the process is a semimartingale if and only if there is a convex combination of the directions of reflection that points into the wedge. This equivalence is also shown to hold starting from the corner, except in one unresolved case for which the wedge angle exceeds π and the directions of reflection are exactly opposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450279
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  • 18
    Electronic Resource
    Electronic Resource
    Reflected Brownian motion with skew symmetric data in a polyhedral domain (1987)
    Springer
    Probability theory and related fields 75 (1987), S. 459-485 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary This paper is concerned with the characterization and invariant measures of certain reflected Brownian motions (RBM's) in polyhedral domains. The kind of RBM studied here behaves like d-dimensional Brownian motion with constant drift μ in the interior of a simple polyhedron and is instantaneously reflected at the boundary in directions that depend on the face that is hit. Under the assumption that the directions of reflection satisfy a certain skew symmetry condition first introduced in Harrison-Williams [9], it is shown that such an RBM can be characterized in terms of a family of submartingales and that it reaches non-smooth parts of the boundary with probability zero. In [9], a purely analytic problem associated with such an RBM was solved. Here the exponential form solution obtained in [9] is shown to be the density of an invariant measure for the RBM. Furthermore, if the density is integrable over the polyhedral state space, then it yields the unique stationary distribution for the RBM. In the proofs of these results, a key role is played by a dual process for the RBM and by results in [9] for reflected Brownian motions on smooth approximating domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00320328
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  • 19
    Electronic Resource
    Electronic Resource
    Some examples of the functions of metal ions in biology (1988)
    Springer
    Bioscience reports 8 (1988), S. 653-668 
    Details
    ISSN: 1573-4935
    Keywords: metal ions ; inorganic ions ; cations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The ways in which certain inorganic elements are used in essential roles within biological systems generally are described. The two roles stressed are (1) electrolytic charge movements and (2) electronic charge movement. The value of helical proteins inside and outside membranes as mechanical coupling devices is analysed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01117344
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  • 20
    Electronic Resource
    Electronic Resource
    Correction to: A boundary property of semimartingale reflecting brownian motions (1989)
    Springer
    Probability theory and related fields 80 (1989), S. 633-633 
    Details
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318910
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