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  • 1
    Electronic Resource
    Electronic Resource
    Kinematical two-dimensional multiple-diffraction intensity profiles. Application to ω–ψ scans of silicon and diamond obtained with synchrotron radiation (2001)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 34 (2001), S. 157-165 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: In a previous paper by Rossmanith [J. Appl. Cryst. (2000), 33, 1405–1414], expressions for the calculation of multiple-diffraction patterns observed in ω–ψ scans of Bragg reflections were derived within the framework of the kinematical theory, taking into account the divergence and wavelength spread of the incident beam, as well as the mosaic structure of the crystal sample. Agreement with Cu Kα experiments was demonstrated. In this paper, it is shown that the theoretical expressions are also suitable for synchrotron radiation experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889801001352
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Primary Extinction and Absorption: a Theoretical Approach Based on the Takagi-Taupin Equations. Application to Spherical Crystals (1998)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 191-198 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The primary-extinction problem for X-ray diffraction by perfect crystals is treated using the Becker–Coppens iterative procedure within the Takagi–Taupin equations. An analytical approximation for the primary-extinction factor yp describing both the effects of the X-ray multiple scattering and the absorption processes within the perfect crystal of an arbitrary shape is derived. The solution differs from the known expressions given by Zachariasen and Becker & Coppens on the basis of the Hamilton–Darwin intensity transfer equations and in the limiting case of a non-absorbing crystal it concurs with the Kato–Becker formula found in the Laue approximation of the dynamical theory. The theoretical results are consistent with experimental data of a number of reflections of Ge and Si single-crystal spheres measured at X-ray wavelengths λ = 0.56, 0.71 and 1.54 Å with a laboratory CAD-4 and a Huber four-circle diffractometer at HASYLAB, DESY, Hamburg, Germany. Two novel features are discussed. First, it is shown that by neglecting the X-ray absorption effect the calculated extinction factor yp is close to the value given by the Becker–Coppens formula. Second, it was found that for absorbing spherical crystals with μR ≥ 1 absorption effects cannot be treated separately from the primary-extinction phenomenon because of imaginary dispersion corrections to the atomic form factors. The experimental data are fitted to the Becker–Coppens and present theoretical models. The best fits are found to relate to the present model and produce relatively low R factors of 3 to 6% for the Bragg intensities measured in the cases of Si and Ge spherical crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767397012579
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  • 3
    Electronic Resource
    Electronic Resource
    Greenhouse Gases in Cold Water Filaments in the Arabian Sea During the Southwest Monsoon (1999)
    Springer
    Naturwissenschaften 86 (1999), S. 489-491 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract  The distribution of partial pressure of carbon dioxide and the concentrations of nitrous oxide and methane were investigated in a cold water filament near the coastal upwelling region off Oman at the beginning of the southwest monsoon in 1997. The results suggest that such filaments are regions of intense biogeochemical activity which may affect the marine cycling of climatically relevant trace gases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001140050660
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  • 4
    Electronic Resource
    Electronic Resource
    Determination of lysine damage and calculation of lysine bio-availability in several processed foods (1991)
    Springer
    European journal of nutrition 30 (1991), S. 46-49 
    Details
    ISSN: 1436-6215
    Keywords: furosine, fructoselysine, lysine-inactivation ; bio-availability of lysine ; food processing ; Protein Digestibility CorrectedAmino Acid Score ; Furosin ; Fruktoselysin ; Lysin-Inaktivierung ; Bioverfügbarkeit von Lysin ; Lebensmittelverarbeitung ; Protein Digestibility Corrected Amino Acid Score
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Mit Hilfe der Furosinmethode wurde der Gehalt an inaktiviertem Lysin in verschiedenen Lebensmitteln bestimmt. Der Gehalt an verfügbarem Lysin und Gesamtlysin wurde auf der Basis dieser Werte berechnet. Es zeigte sich, daß in manchen Lebensmitteln eine erhebliche Lysinschädigung zu verzeichnen war, und zwar besonders in erhitzten Backwaren und Cerealien, in Milchprodukten einschließlich mancher Säuglingsnahrung. Dies kann für Bevölkerungsgruppen, die sich proteinarm ernähren, Konsequenzen haben und führt zu einer Fehlbewertung der Proteinqualität auf der Basis sogenannter Amino Acid Scores (z. B. des neuen „Protein Digestibility Corrected Amino Acid Score“).
    Notes: Summary By analyzing lysine and furosine the amount of inactivated lysine in several food systems was determined and the values for available lysine and total lysine were calculated. Considerable heat damage was found in heated cereal products, and in heated milk products, including several formula for children and hospitalized patients. Some products contained more inactivated lysine than available lysine. This may have consequences for the nutrition in low protein consuming populations and leads to errors in predicting the protein quality, e.g., by the recently proposed “Protein Digestibility Corrected Amino Acid Score”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01910731
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  • 5
    Electronic Resource
    Electronic Resource
    Dampfstrahl-Vakuumpumpen in der Verfahrenstechnik (1966)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 38 (1966), S. 274-279 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Unter allen Strahlpumpen haben die Dampfstrahl-Vakuumpumpen die größte Bedeutung erlangt. An Hand von Druck- und Geschwindigkeitsdiagrammen wird die Arbeitsweise der einzelnen Verdichterstufe einer derartigen Vakuumpumpe beschrieben. Eine Saugdruck- und eine Gegendruck-Kurve zeigen ihr typisches Betriebsverhalten, das von dem anderer Verdichterbauarten wesentlich abweicht. Auch heute werden Dampfstrahl-Vakuumpumpen nach überwiegend empirischen Methoden ausgelegt, da die inneren Vorgänge nur unter starken Vereinfachungen rechnerisch erfaßbar sind. Saugdrücke von 10-1 bis 10-2 Torr sind üblich; wirtschaftlich erreichbar sind 10-3 Torr.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330380317
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