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  • Springer  (10)
  • American Institute of Physics (AIP)  (2)
  • Nature Publishing Group  (2)
  • 1995-1999  (14)
  • 1910-1914
  • 1905-1909
  • 1997  (14)
  • 1
    Electronic Resource
    Electronic Resource
    One- and two-dimensional simulations of ultra-short-pulse reflectometry (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 1238-1243 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Ultra-short-pulse reflectometry is studied by means of the numerical integration of one- and two-dimensional full-wave equations for ordinary and extraordinary modes propagating in a plasma. The numerical calculations illustrate the use of the reflection of ultra-short-pulse microwaves as an effective probe of the density or magnetic profile in the presence of density or magnetic fluctuations in the plasma. Bragg resonance effects can be identified in the reflected signals, which give information on fluctuations. It is also demonstrated that ultra-short-pulse reflectometry can be used to perform correlation reflectometry measurements in which correlation lengths for density fluctuations are deduced from the observed cross-correlation function of phase shifts as a function of frequency. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147896
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  • 2
    Electronic Resource
    Electronic Resource
    One- and two-dimensional simulations of ultra-short-pulse reflectometry (abstract) : Proceedings of the eleventh topical conference on high temperature plasma diagnostics (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 477-477 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Ultra-short-pulse reflectometry is studied by means of the numerical integration of one- and two-dimensional full-wave equations for ordinary and extraordinary modes propagating in a plasma. The numerical calculations illustrate the use of the reflection of ultra-short-pulse microwaves as an effective probe of the density or magnetic profile in the presence of density or magnetic fluctuations in the plasma. Bragg resonance effects can be identified in the reflected signals, which give information on fluctuations. It is also demonstrated that ultra-short-pulse reflectometry can be used to perform correlation reflectometry measurements in which correlation lengths for density fluctuations are deduced from the observed cross-correlation function of phase shifts as a function of frequency. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148224
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  • 3
    Electronic Resource
    Electronic Resource
    Testis-derived Sertoli cells have a trophic effect on dopamine neurons and alleviate hemiparkinsonism in rats (1997)
    [s.l.] : Nature Publishing Group
    Nature medicine 3 (1997), S. 1129-1132 
    Details
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Neural tissue transplantation has become an alternative treatment for Parkinson's disease (PD)1,2 and other neurodegenerative disorders. The clinical use of neural grafts as a source of dopamine for Parkinson's disease patients, although beneficial, is associated with logistical and ethical issues. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nm1097-1129
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  • 4
    Electronic Resource
    Electronic Resource
    Cooking Oil: A Home Fire Hazard in Alberta, Canada (1997)
    Springer
    Fire technology 33 (1997), S. 140-166 
    Details
    ISSN: 1572-8099
    Keywords: Canada ; Alberta ; cooking equipment ; cooking oil ; fire injuries ; smoke point ; flash point ; fire hazard ; fire statistics ; prevention
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract This paper begins with a brief statistical analysis to establish the significant contribution of cooking equipment fires to fire losses and injuries in Canadian homes. Due to lack of comprehensive fire loss data for Canadian homes, further analysis is focused on Alberta data. The most frequent ignition scenario, based on a top-down analysis of Alberta home fires, was the ignition of overheated cooking oil in pots, deep-fat fryers, or pans heated on stove tops. These fires also accounted for the majority of home fire injuries. Fire characteristics of cooking oils, which point to the importance of maintaining oil temperatures below their flash points, and thermostatically controlled deep-fat fryers as the best available solution to the problem are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1015395001403
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  • 5
    Electronic Resource
    Electronic Resource
    Solution structure of human CTLA-4 and delineation of a CD80/CD86 binding site conserved in CD28 (1997)
    [s.l.] : Nature Publishing Group
    Nature structural biology 4 (1997), S. 527-531 
    Details
    ISSN: 1072-8368
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The structure of human CTLA-4 reveals that residues Met 99, Tyr 100 and Tyr 104 of the M99 YPPPY104 motif are adjacent to a patch of charged surface residues on the A‘GFCC’ face of the protein. Mutation of these residues, which are conserved in the CTLA-4/CD28 family, significantly ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsb0797-527
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  • 6
    Electronic Resource
    Electronic Resource
    29Si NMR investigations on oligosilane dendrimers (1997)
    Springer
    Fresenius' journal of analytical chemistry 357 (1997), S. 503-504 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Starting with the high functionalized trisilane SiClMe(SiCl2Me)2 and tetrasilane SiMe(SiCl2Me)3 several octa- and decasilane dendrimers containing directly neighboured branchings were prepared. In these compounds the 29Si NMR chemical shifts of the different silyl groups are shifted towards lower field compared with those of analogous groups in tetra- or hexasilanes. This observation is a helpful tool for the characterization of further dendritic oligomers by 29Si NMR.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050201
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of chemically modified silica by infrared and solid state nuclear magnetic resonance spectroscopy (1997)
    Springer
    Fresenius' journal of analytical chemistry 358 (1997), S. 240-241 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Silica modified with benzene was investigated by infrared and solid state 13C cross-polarization magic angle spinning nuclear magnetic resonance spectroscopy (13C CP MAS NMR). Whereas infrared spectroscopy did not allow to distinguish between phenyl and polyphenyl groups, this was possible by solid state nuclear magnetic resonance spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050394
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  • 8
    Electronic Resource
    Electronic Resource
    Direct and iterative solvers for finite-element problems (1997)
    Springer
    Numerical algorithms 16 (1997), S. 39-53 
    Details
    ISSN: 1572-9265
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Parallelization promises to allow increasing performance demand from users of scientific computation codes. In this article we discuss implementation of parallelization techniques in industrial computation codes for applications in Fluid Mechanics (N3S) and Structural Mechanics (Code_ASTER). We outline the gains afforded by parallelization on a Cray C98 machine in production mode, using a single version of the program running in sequential or in parallel mode, with minimum modifications to the initial code. Parallelization is applied at the discretion of the user, for whom no specialist knowledge of this technique is assumed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019174710859
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  • 9
    Electronic Resource
    Electronic Resource
    Determination of Extent of Formaldehyde-Induced Crosslinking in Hard Gelatin Capsules by Near-Infrared Spectrophotometry (1997)
    Springer
    Pharmaceutical research 14 (1997), S. 1046-1050 
    Details
    ISSN: 1573-904X
    Keywords: gelatin ; crosslinking ; formaldehyde ; dissolution ; near-infrared spectrophotometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. To predict the degree of crosslinking from formaldehyde-stressed hard gelatin capsules (HGCs) using near-infrared spectrophotometry (NIR). Methods. HGCs were exposed to a 150 ppb atmosphere of formaldehyde for 2.25,4.60,9.42, 16.0 and 24.0 hours. The capsules were filled with fresh amoxicillin, placed in a 90° conical reflector cone, and scanned in a NIR spectrophotometer. Principal component regression (PCR) was employed to analyze the spectra of the intact capsules. Dissolution profiles were then obtained for each experimental group. Results. The dissolution of amoxicillin from the capsules at pH 1.2 was found to decrease with increasing time of exposure to the formaldehyde atmosphere. A set of principal components (PCs) was formed by a linear combination of the absorbance values at each wavelength scanned. A good correlation was established (r2 = 0.963) when PC values from the NIR spectra of the HGCs were regressed against percentage of amoxicillin dissolved at 45 minutes, at pH 1.2. Water content of the capsules was found to be the largest determinant in the variation between HGC spectra at each exposure time. Conclusions. NIR spectrophotometry, combined with PCR, was successful at not only predicting dissolution of HGCs exposed to formaldehyde, but also at determining which wavelengths contributed most to spectral variation of these stressed HGCs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012105412735
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  • 10
    Electronic Resource
    Electronic Resource
    Genetic distribution of Bare–1-like retrotransposable elements in the barley genome revealed by sequence-specific amplification polymorphisms (S-SAP) (1997)
    Springer
    Molecular genetics and genomics 253 (1997), S. 687-694 
    Details
    ISSN: 1617-4623
    Keywords: Key words Bare-1  ;  Retrotransposons  ;  Barely  ;   Linkage analysis  ;  Sequence-Specific Amplification Polymorphisms (S-SAPs)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Retrotransposons are present in high copy number in many plant genomes. They show a considerable degree of sequence heterogeneity and insertional polymorphism, both within and between species. We describe here a polymerase chain reaction (PCR)-based method which exploits this polymorphism for the generation of molecular markers in barley. The method produces amplified fragments containing a Bare–1-like retrotransposon long terminal repeat (LTR) sequence at one end and a flanking host restriction site at the other. The level of polymorphism is higher than that revealed by amplified fragment length polymorphism (AFLP) in barley. Segregation data for 55 fragments, which were polymorphic in a doubled haploid barley population, were analysed alongside an existing framework of some 400 other markers. The markers showed a widespread distribution over the seven linkage groups, which is consistent with the distribution of the Bare–1 class of retrotransposons in the barley genome based on in situ hybridisation data. The potential applicability of this method to the mapping of other multicopy sequences in plants is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380050372
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