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  • Articles  (2)
  • Crystal water  (1)
  • quantum theory  (1)
  • Springer  (2)
  • Elsevier
  • Geological Society of America (GSA)
  • 2010-2014
  • 1990-1994  (2)
Collection
  • Articles  (2)
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Keywords
Publisher
  • Springer  (2)
  • Elsevier
  • Geological Society of America (GSA)
Years
  • 2010-2014
  • 1990-1994  (2)
Year
Topic
  • 1
    Electronic Resource
    Electronic Resource
    The hydration shell of myoglobin (1992)
    Springer
    European biophysics journal 21 (1992), S. 313-320 
    Details
    ISSN: 1432-1017
    Keywords: Monte Carlo ; Crystal water ; Structure refinement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract The space in the unit cell of a metmyoglobin crystal not occupied by myoglobin atoms was filled with water using Monte Carlo calculations. Independent calculations with different amounts of water have been performed. Structure factors were calculated using the water coordinates thus obtained and the known coordinates of the myoglobin atoms. A comparison with experimental structure factors showed that both the low and the high resolution regime could be well reproduced with 814 Monte Carlo water molecules per unit cell with a B-value of 50 Å2. The Monte Carlo water molecules yield a smaller standard R-value (0.166) than using a homogeneous electron density for the simulation of the crystal water (R = 0.212). A reciprocal space refinement of the water and the protein coordinates has been performed. Monte Carlo calculations can be used to obtain information for crystallographically invisible parts of the unit cell and yield better coordinates for the visible part in the refinement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00188343
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Heisenberg's uncertainty relation of position and momentum in experiments without mutual disturbance (1990)
    Springer
    Foundations of physics 3 (1990), S. 249-254 
    Details
    ISSN: 1572-9524
    Keywords: quantum theory ; fundamentals ; uncertainty relation violations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Arranging target atoms in a plane monolayer, one may produce by atomic or nuclear reaction an ensemble of particles with small initial position spread without disturbing their momentum spread. This would either allow a violation of Heisenberg's uncertainty relation, by creating a situation not described by quantum mechanics hence rendering quantum mechanics incomplete, or, if the uncertainty relation should hold also in this non-disturbative situation, it would mean a permanent violation of energy conservation. Thus an uncertainty relation for position and momentum and energy conservation appear to be mutually exclusive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00666015
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    Paper (German National Licenses)
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