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  • 1
    Electronic Resource
    Electronic Resource
    Assessment of the flexibilities of carbohydrate polymers by proton-NMR relaxation and line shape analysis (1982)
    s.l. : American Chemical Society
    Macromolecules 15 (1982), S. 597-602 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00230a075
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of S-deoxo[Ile3]amaninamide: a synthetic analog of Amanita toxins (1984)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 106 (1984), S. 4606-4615 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00328a051
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  • 3
    Electronic Resource
    Electronic Resource
    Molecular cloning of the gene for human anti-haemophilic factor IX (1982)
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 178-180 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As a first step in the isolation of a cDNA clone for bovine factor IX, bovine liver was used to prepare total mRNA by the guanidine hydrochloride method3. A preparation enriched in factor IX-specific mRNA was obtained by oligo (dT)-cellulose chromatography, followed by two successive separations by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/299178a0
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular basis for the α 1 -protease inhibitor deficiency (1975)
    [s.l.] : Nature Publishing Group
    Nature 255 (1975), S. 240-241 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] So far however the molecular basis for this deficiency has not been established although Bell and Carrell2 and Cox3 suggested that the Z protein lacked some of the sialic acid residues found in the normal protein. They reasoned that a glycoprotein with fewer terminal sialic acid residues could be ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/255240a0
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  • 5
    Electronic Resource
    Electronic Resource
    A general theory of X-ray intensity statistics for twins by merohedry (1982)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 38 (1982), S. 201-207 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A general theory of X-ray intensity statistics for twins by merohedry is developed based on mathematical analogy of this problem to a one-dimensional random walk. Probability distribution functions are derived (a) for intensities from a single twinned specimen, and (b) for the differences in intensities from two separate twinned specimens. Theoretical values of a discrepancy index between observed intensities from a twin, and calculated intensities from both correct and incorrect structural models are evaluated. A new method for determining volume fractions of crystals in a twin is also proposed, based on the distribution of differences in intensities between twin-related reflections. These results have implications for the treatment of isomorphous replacement data collected from twins by hemihedry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S056773948200045X
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  • 6
    Electronic Resource
    Electronic Resource
    Incorporation of experimental phases in a restrained least-squares refinement (1983)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 94-97 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The least-squares refinement of macromolecular structures is characterized by a low ratio of observed data to refined parameters. Efforts have been made to compensate for this problem by incorporating subsidiary restraints into the observational equations. In this paper, a method is proposed and examples given for the introduction of additional observations into a least- squares refinement in the form of experimental phase information.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767383000173
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  • 7
    Electronic Resource
    Electronic Resource
    The influence of twinning by merohedry on intensity statistics (1980)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 36 (1980), S. 578-581 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A simple test based on intensity statistics is presented for the detection of twinning by merohedry. Using relationships derived in the text, the twinning fraction of a crystal may be estimated from the intensity probability distribution. Unlike most methods for the detection of twinning, application of this test does not require knowledge of the twinning operation. Two possible mechanisms for increasing the apparent diffraction symmetry of a crystal, twinning by merohedry and crystal disorder, may be distinguished in certain cases by these procedures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739480001234
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  • 8
    Electronic Resource
    Electronic Resource
    Largest likely values for R factors calculated after phase refinement by non-crystallographic symmetry averaging (1983)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 916-920 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The progress of phase refinement by non-crystallographic symmetry averaging is often described by the behavior of a crystallographic R factor expressing agreement between the observed structure factors and structure factors calculated from an averaged electron density map. An upper limit for this R factor is evaluated for the case of incorrectly positioned non-crystallographic symmetry operators. Depending on the degree of non-crystallographic symmetry, the upper limit on R varies from 0.29 to 0.3, for acentric structures. Incorrect structures with the correct non-crystallographic symmetry are anticipated to converge to even lower values of R. In all cases, R values calculated for incorrect structures will be significantly lower than the value of 0.586 characteristic of wrong structures lacking non-crystallographic symmetry [Wilson (1950). Acta Cryst. 3, 397-399].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S010876738300183X
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  • 9
    Electronic Resource
    Electronic Resource
    Statistical modification of anomalous-scattering differences (1983)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 39 (1983), S. 512-515 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Statistical methodology originally introduced by French & Wilson [Acta Cryst. (1978). A34, 517-525] for the treatment of negative-intensity observations is shown to be useful for the estimation of anomalous-scattering differences. The general principles of this method are described, along with applications to data from a lead derivative of the enzyme carboxypeptidase A.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767383000999
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of wind and shaking on the water relations of Pinus contorta (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 51 (1981), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: It is usually suggested that the effects of wind on plant growth and development are caused by water stress. The purpose of the work reported in this paper is to examine this suggestion by a series of experiments in a controlled environment wind tunnel. Cuticular conductance of Pinus contorta subjected to low and high wind-speeds were determined by weighing detached needles on a microbalance. Although the needles collided with each other at the high wind-speed, there was no effect on cuticular conductance, unlike results obtained elsewhere with broader-leaved plants. The transpiration rates and needle conductances of whole plants were unaffected by exposure to wind or a gentle shaking treatment. Water potentials and pressure-volume curves were determined on individual needles of Pinus contorta. Wind and shaking had no effect on total, solute, or pressure potentials, or in any of the parameters describing the pressure-volume curves. It is concluded that the effects of these treatments on growth of Pinus contorta, reported in previous papers, are unlikely to be caused by tissue water stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1981.tb02702.x
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