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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 10155-10172 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We present new measurements of inelastic He atom scattering from the surface phonons of Cu(001) as a function of crystal temperature, incident energy, and parallel momentum transfer. A careful subtraction of the multiphonon intensity and other background contributions from the time-of-flight intensities reveals three distinct surface-localized vibrational modes which are ascribed to the Rayleigh phonon, the longitudinal bulk resonance, and a further acoustic bulk resonance at higher energy transfers. The longitudinal resonance couples very strongly to the scattering He atoms and, for a wide range of incident conditions, gives peaks which are more intense than those due to the Rayleigh mode. The energy and momentum dependence of these peak intensities are analyzed with the aid of a simple distorted wave Born approximation, and the different coupling parameters for the two modes are determined and compared with other available data. The incoherent diffuse elastic peak is shown to decrease as a function of parallel momentum transfer according to the theory of Fraunhofer scattering from a random array of point defects. The multiphonon background is shown to be in agreement with a quick scattering approximation. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial & engineering chemistry 7 (1915), S. 83-83 
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Neuroscience 17 (1994), S. 399-418 
    ISSN: 0147-006X
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical microbiology & infectious diseases 9 (1990), S. 304-305 
    ISSN: 1435-4373
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 167 (1917), S. 267-279 
    ISSN: 1432-2013
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Kartoffelstärkekörner sind wegen ihrer glatten, runden Konturen ein sehr günstiges Objekt zum Studium des Haftens fester Partikel an Flüssigkeitsgrenzen. Sie adhärieren an der Grenze von Wasser und von äther, Butylalkohol, Amylalkohol, Chloroform, Benzol, Petroleum, Paraffinöl der Reihenfolge nach zunehmend besser. Ihre Grenzadhäsion wird durch Ansäuern des Wassers, in dem sie suspendiert sind, oder durch Zusatz von Kochsalz, besonders aber durch Sättigung mit Ammonsulfat erhöht. Durch Abänderung der Versuchsbedingungen kann man so an Stärkekörnern die Erscheinungsformen der Grenzadhäsion: teil weises und quantitatives, vorÜbergehendes und dauerndes Haften, Zusammenballung der Partikel durch anhaftende Flüssigkeitstropfen (Flockung), Emulsion der zweiten Flüssigkeit, in allen Einzelheiten zur Erscheinung bringen. Dies sowie die mikroskopische Beobachtung, dass die Berührungsfläche der Stärkekörner mit der zweiten Flüssigkeit sehr leicht verschieblich ist, ist für die Theorie des Haftens von Bedeutung. Die Versuche an Stärkekörnern sollen ferner zum Studium der Erscheinungen an Stärkekleister hinÜberführen.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 72 (1898), S. 409-466 
    ISSN: 1432-2013
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 127-128 (1993), S. 71-80 
    ISSN: 1573-4919
    Keywords: Cyclic GMP-dependent protein kinase ; Escherichia coli ; post-translational modification ; protein folding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Cyclic GMP-dependent protein kinase (cGMP kinase) is involved in the relaxation of smooth muscle. The enzyme has been cloned and expressed in eukaryotic cell lines but so far not in prokaryotic cells. Three vectors were constructed for the expression of Iα cGMP kinase inEscherichia coli. Transformation with the pET3a/cgk vector which uses the T7 RNA polymerase/promotor system resulted in efficient accumulation of cGMP kinase. Most of the protein was in an insoluble and catalytic inactive form. Various solubilization and refolding conditions did not yield an active enzyme. A small fraction of the cGMP kinase was present in the soluble cell extract. This fraction bound cGMP with high affinity but had no cGMP stimulated kinase activity. To prevent aggregation two additional vectors were constructed. (I) A bacterial leader sequence, which directs the export of proteins into the periplasmic space, was fused to the aminoterminus of the cGMP kinase. (II) A gram/gram+ shuttle vector for expression under the control of the tac promotor was used. Both constructs directed the synthesis of an isoluble and inactive cGMP kinase. These results suggest that large amounts of cGMP kinase can be expressed inE. coli, but mainly in an isoluble and inactive form. In contrast to eukaryotic cells, bacteria may lack systems for correct protein folding and/or posttranslational modification that are crucial for the productive folding and/or activation of cGMP kinase.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Molecular and cellular biochemistry 131 (1994), S. 97-97 
    ISSN: 1573-4919
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Reviews of physiology, biochemistry and pharmacology 15 (1916), S. 238-339 
    ISSN: 1617-5786
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Chemical and petroleum engineering 30 (1994), S. 86-90 
    ISSN: 1573-8329
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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