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  • 1
    Electronic Resource
    Electronic Resource
    REGULATION OF PERITHECIA PRODUCTION IN FUSARIUM ROSEUM BY ZEARALENONE (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food safety 5 (1983), S. 0 
    Details
    ISSN: 1745-4565
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Zearalenone, a phytoestrogen produced by various species of Fusarium, regulates perithecial formation in F. roseum ‘Graminearum’. The response is concentration dependent, enhancing at low concentrations (1–10 ng) and inhibiting at high concentrations (10–100 μg). The biological activity can be modified by varying the chemical structure of the parent molecule. Zearalenone binds to mammalian estrogen receptor protein competitively with estradiol. Conversely estradiol binds to specific receptor protein from Fusarium mycelium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-4565.1983.tb00454.x
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  • 2
    Electronic Resource
    Electronic Resource
    Binding of a mitochondrial presequence to natural and artificial membranes: role of surface potential (1992)
    s.l. : American Chemical Society
    Biochemistry 31 (1992), S. 5746-5751 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00140a009
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  • 3
    Electronic Resource
    Electronic Resource
    Dynamic properties of the first steps of enzymatic reaction of porcine pancreatic elastase (PPE). 2. Molecular dynamics simulation of a Michaelis complex: PPE and hexapeptide Thr-Pro-n-Val-Leu-Tyr-Thr (1990)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 112 (1990), S. 8925-8931 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00180a043
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  • 4
    Electronic Resource
    Electronic Resource
    Fatigue of Articular Cartilage (1973)
    [s.l.] : Nature Publishing Group
    Nature 244 (1973), S. 303-304 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The apparatus was a vertically mounted electromagnetic solenoid, with a hemispherically-ended perspex indenter 3 mm in diameter attached rigidly to its core: weights were attached to the core above the solenoid. Specimens were mounted in a perspex bath containing Ringer's solution plus mycifradin ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/244303a0
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  • 5
    Electronic Resource
    Electronic Resource
    Tensile Properties of Articular Cartilage (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 1127-1128 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Curves of nominal stress (load-original cross-sectional area) versus extension or all four layers of a specimen taken from a 60 ear old male. The prick lines were arallel to the load axis. Table 1. ULTIMATE TENSILE STRESS FOR TWO ORIENTATIONS Specimen Parallel Across (1) Female 67 160 47 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2201127b0
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of noise on entropy (1993)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 182-185 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: A complementary relationship between the entropy (S) and the variance (σ2) of an electron-density map is derived by approximating the logarithmic term in the entropy expression by a series expansion around the average map density. The resulting expression is S ∼ ln N − {1 \over 2}σ2, where N is the number of grid points and σ is the r.m.s. deviation from the mean in a map normalized to unit mean. The algebraic expression is of interest because it is consistent with and allows numerical evaluation of the surprising argument that noise decreases the entropy of a map. The argument is that a noise contribution by itself generates a certain variance that is independent of the atomic structure and that adds to the variance due to the structure. Increased variance corresponds to decreased entropy. This property of noise provides an intuitively reasonable justification for maximizing the entropy of an electron-density map in the quest for more readily interpretable maps of macromolecules. The entropy–variance relationship also extends the range of applicability of the entropy concept to maps with a limited amount of negative density. The approximation which leads to the entropy–variance relationship is most applicable where it is most likely to be useful – in experimental maps of relatively low structure definition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444992010084
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  • 7
    Electronic Resource
    Electronic Resource
    Core tracing: depicting connections between features in electron density (1994)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 50 (1994), S. 695-708 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Core tracing is a threshold-independent method of determining connectivity (long chains of high-density values) in electron-density maps. It gives visually sparse pictures of large volumes which are useful for initial fitting and for molecular-boundary determination. New methods for visual presentation of the traces are suggested by the way that the connectivity is parameterized in terms of local connections between maxima and the saddle (lowest) points along the connecting paths. The algorithm also partitions the density into small compact volumes containing the maxima. These volumes are useful for localization and statistical analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444994002398
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  • 8
    Electronic Resource
    Electronic Resource
    Effective resolution of macromolecular X-ray diffraction data (1988)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 44 (1988), S. 437-442 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: 'Effective resolution' is a practical quantitative measure of the extent, quality, and completeness of X-ray diffraction data. Sparrow's [Astrophys. J. (1916), 44, 76-86] criterion for the separation of just resolved peaks is applied to a typical electron density peak shape, which, in turn, is the Fourier transform of an average form factor derived from the observed Fhkl's. Numerical studies of a Gaussian form factor, with appropriate modifications for atomic scattering factors, give a quantitative picture of the dependence of resolution on both the amount of data and the underlying structural features. The relation between effective resolution and nominal resolution (drain) depends only on the ratio of the limiting high-resolution peak width to dmin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767388001382
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  • 9
    Electronic Resource
    Electronic Resource
    Interactive computer display and analysis of small-molecule crystal structures (1982)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 15 (1982), S. 439-442 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Stereo-diagrams of crystal structures are quickly produced and easily examined with interactive computer, graphics. The viewer can rotate, scale, edit, search and mark the drawing in real time. This gives the image an extra dimension over static, hard-copy plots and facilitates the analysis of crystal packing. Our implementation can `instantly' display structures in the Cambridge Crystallographic Data Files. High speed is achieved, in part, by using the graphics hardware to generate crystallographic symmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889882012321
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  • 10
    Electronic Resource
    Electronic Resource
    Carbon-13 spin-echo spectroscopy as a measure of slow motions in solid polymers
    Amsterdam : Elsevier
    Journal of Magnetic Resonance (1969) 69 (1986), S. 531-534 
    Details
    ISSN: 0022-2364
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0022-2364(86)90170-8
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