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  • 11
    Electronic Resource
    Electronic Resource
    Statistik (1930)
    Springer
    Journal of cancer research and clinical oncology 30 (1930), S. 33-34 
    Details
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01620992
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    High-Spatial-Resolution Low-Energy Electron Beam X-Ray Microanalysis (2000)
    Springer
    Microchimica acta 132 (2000), S. 113-128 
    Details
    ISSN: 1436-5073
    Keywords: Key words: SEM; low voltage; spatial resolution; X-ray microanalysis.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract.  Performing X-ray microanalysis at beam energies lower than those conventionally used (〈 10 keV) is known to significantly improve the spatial resolution for compositional analysis. However, the reduction in the beam energy which reduces the X-ray interaction diameter also introduces analytical difficulties and constraints which can diminish the overall analytical performance. This paper critically assesses the capabilities and limitations of performing low beam energy, high spatial resolution X-ray microanalysis. The actual improvement in the spatial resolution and the reduction in the X-ray yield are explored as the beam energy is reduced. The consequences for spectral interpretation, quantitative analysis and imaging due to the lower X-ray yield and the increased occurrence of X-ray line overlaps are discussed in the context of currently available instrumentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s006040050052
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  • 13
    Electronic Resource
    Electronic Resource
    Interaction of Copper and Sulfur with Dislocations in GaAs (2001)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 78-79 (Apr. 2001), p. 331-340 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/26/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.78-79.331.pdf
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  • 14
    Electronic Resource
    Electronic Resource
    Study of multilayer structures with InAs nanoobjects in a silicon matrix (2000)
    Springer
    Semiconductors 34 (2000), S. 810-814 
    Details
    ISSN: 1063-7826
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract MBE-grown multilayer structures with InAs quantum dots embedded in a crystalline silicon matrix were studied by high resolution transmission electron microscopy. The properties of the grown structures depend critically on the substrate temperature, growth cycle sequence, and layer thicknesses. It is shown that the silicon matrix can “accommodate” only a limited volume of InAs in the form of coherent clusters about 3 nm in size. With an increasing amount of deposited InAs, large dislocated InAs clusters are formed during Si overgrowth, accumulating excess InAs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.1188079
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  • 15
    Electronic Resource
    Electronic Resource
    Phenylacetylene as a new surrogate standard for the determination of BTEX by GC/FID (2000)
    Springer
    Fresenius' journal of analytical chemistry 368 (2000), S. 424-425 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Benzene, toluene, ethylbenzene, xylene (short form: BTEX) and other monoaromatic compounds are environmental contaminants which are often analyzed by GC/FID. For the calculation of BTEX concentrations in water samples normally external quantification with defined BTEX solutions is sufficient. However, for accurate quantification of BTEX in complex matrices it is necessary to use internal standards, e.g. ¶1-chlorohexane. Isotopes of BTEX are usually the best alternative but they are only applicable to GC/MS, because their retention times are similar to the original BTEX. 1-Chlorohexane and phenylacetylene were compared with respect to their quality as internal standards. Good results were obtained with ¶the monoaromatic phenylacetylene as a surrogate standard. The physical properties of phenylacetylene are very similar to BTEX species and it normally does not occur in environmental samples. 1-Chlorohexane was more strongly adsorbed on the used soil than BTEX during sample preparation. This fact suggests that the single aromatic rings of BTEX and phenylacetylene are mainly responsible for the adsorption behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160000479
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  • 16
    Electronic Resource
    Electronic Resource
    Heat Shock Response is Associated with Protection Against Acute Interstitial Pancreatitis in Rats (2000)
    Springer
    Digestive diseases and sciences 45 (2000), S. 2252-2264 
    Details
    ISSN: 1573-2568
    Keywords: cerulein pancreatitis ; dibutyltin dichloride ; cytoprotection ; heat shock protein ; hyperthermia ; transforming growth factor-β1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We recently reported that hyperthermia induces pancreatic expression of heat shock proteins (HSPs), particularly HSP70 isoforms, and protects against cerulein pancreatitis. We have now studied whether a double hyperthermia amplifies these effects and whether hyperthermia also protects against dibutyltin dichloride (DBTC)-induced pancreatitis. A further aim was to examine whether hyperthermia induces changes in transforming growth factor-β1 (TGF-β1). Following pretreatment without or with a single or double hyperthermia, pancreatitis was induced by application of cerulein or DBTC. Pancreatic HSP and TGF-β1 expression were studied by immunoblotting. Pancreas injury was assessed by light microscopy and serum pancreatic enzyme activity. Hyperthermia as well as DBTC induced HSP72, whereas cerulein did not. A double hyperthermia led to a further increase in HSP72 compared to a single heat stress. In both models, hyperthermia significantly reduced pancreatic injury. Although a double hyperthermia slightly decreased the severity of cerulein pancreatitis compared to a single heat treatment, an improved pancreas protection against DBTC cytotoxicity was not achieved. We also found that hyperthermia induces the expression of TGF-β1. In conclusion, hyperthermia preconditioning exerts protective effects against two pathophysiologically different types of pancreatitis by a mechanism that involves the up-regulation of HSP70 isoforms as well as TGF-β1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026459001195
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