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  • 1
    Electronic Resource
    Electronic Resource
    Frequency-dependent Attenuation of High-frequency P and S Waves in the Upper Crust in Western Nagano, Japan (1998)
    Springer
    Pure and applied geophysics 153 (1998), S. 489-502 
    Details
    ISSN: 1420-9136
    Keywords: Key words: Attenuation, crust, frequency dependence, high-frequency seismic waves, quality factor.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —Borehole seismograms from local earthquakes in the aftershock region of the 1984 western Nagano Prefecture, Japan earthquake were analyzed to measure the frequency-dependent characteristics of P- and S-wave attenuation in the upper crust. The records from a three-component velocity seismometer at the depth of 145m exhibit high S/N-ratio in a wide frequency range up to 100 Hz. Extended coda normalization methods were applied to bandpass-filtered seismograms of frequencies from 25 to 102 Hz. For the attenuation of high-frequency P and S waves, our measurements show Q P -1≃ 0.052ƒ-0.66 and Q S -1≃ 0.0034ƒ-0.12 respectively. The frequency dependence of the quality factor of S waves is very weak as compared with that of P waves. The ratio of Q P -1/Q S -1 is larger than unity in the entire analyzed frequency range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050205
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Molecular cloning of a group of mouse pancreatic islet beta-cell-related genes by random cDNA sequencing (1995)
    Springer
    Diabetologia 38 (1995), S. 381-386 
    Details
    ISSN: 1432-0428
    Keywords: Random cDNA sequencing ; MIN6 ; pancreatic islet beta cell
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To understand the molecular basis of glucose concentration-responsive insulin synthesis and secretion from pancreatic islet beta cells, a group of pancreatic islet beta-cell-related cDNAs was cloned. A pair of cDNA libraries was constructed from a mouse pancreatic islet beta-cell line of MIN6, which was cultured in either high glucose or low glucose media. By applying a random cDNA sequencing approach, 503 and 395 independent species were obtained from a total of 1,011 and 762 clones in the high glucose and low glucose library, respectively. The unknown genes comprised the majority of about 70% independent clones in both libraries. In Northern blot analysis, 311 (69.4%) of 448 independent clones showed positive signals within 72 h of autoradiographic exposure. Surprisingly, 150 (48.2%) out of 311 positive clones showed positive signals to MIN6 cells, but not to NIH/3T3 fibroblasts. The expression level of three unknown clones were glucose-concentration dependent. Combination of a random cDNA sequencing approach and Northern blot analysis is useful to obtain a large number of novel genes and islet beta-cell-related genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410274
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Molecular cloning of a group of mouse pancreatic islet beta-cell-related genes by random cDNA sequencing (1995)
    Springer
    Diabetologia 38 (1995), S. 381-386 
    Details
    ISSN: 1432-0428
    Keywords: Key words Random cDNA sequencing ; MIN6 ; pancreatic islet beta cell.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To understand the molecular basis of glucose concentration-responsive insulin synthesis and secretion from pancreatic islet beta cells, a group of pancreatic islet beta-cell-related cDNAs was cloned. A pair of cDNA libraries was constructed from a mouse pancreatic islet beta-cell line of MIN6, which was cultured in either high glucose or low glucose media. By applying a random cDNA sequencing approach, 503 and 395 independent species were obtained from a total of 1,011 and 762 clones in the high glucose and low glucose library, respectively. The unknown genes comprised the majority of about 70 % independent clones in both libraries. In Northern blot analysis, 311 (69.4 %) of 448 independent clones showed positive signals within 72 h of autoradiographic exposure. Surprisingly, 150 (48.2 %) out of 311 positive clones showed positive signals to MIN6 cells, but not to NIH/3T3 fibroblasts. The expression level of three unknown clones were glucose-concentration dependent. Combination of a random cDNA sequencing approach and Northern blot analysis is useful to obtain a large number of novel genes and islet beta-cell-related genes. [Diabetologia (1995) 38: 381–386]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410274
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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