Proceedings of the Japan Academy, Series B
Online ISSN : 1349-2896
Print ISSN : 0386-2208
ISSN-L : 0386-2208
Volume 67 , Issue 3
Showing 1-7 articles out of 7 articles from the selected issue
  • Ryoichi FUJII, Hiromitsu AKIYAMA, Susumu KOKUBUN, Nobuyuki YAJIMA, Jyu ...
    1991 Volume 67 Issue 3 Pages 17-21
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    A Polar Patrol Balloon (PPB) accomplished a complete circumpolar flight over the Antarctic. The total intensity of the geomagnetic main field measured by an onboard magnetometer shows a satisfactory agreement with that calculate from IGRF-model. A coincidence of the actual PPB trajectory with that calculated from the wind data indicates that the wind flow with the synoptic scale has little variability in the summer stratosphere in Antarctica. The novel PPB systems open new fields for the detailed observations of polar phenomena at a balloon altitude.
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  • Hisako HIRAI, Ken-ichi KONDO
    1991 Volume 67 Issue 3 Pages 22-26
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    A new crystalline carbon form was successfully recovered from the shock-compressed graphite to 65GPa and 3700K using a rapid cooling technique. Electron diffraction pattern (EDP) of the form can not be identified as any kinds of carbon form in the literature. The EDP is characterized by the presence of forbidden reflections indexed as {200} and {240} in extinction rule of cubic diamond. Other reflections have similar d-spacings to those of cubic diamond, indicating that basic structure of the form is close to cubic diamond.
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  • Kazuo OGAWA
    1991 Volume 67 Issue 3 Pages 27-31
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    The cDNA clone for sea urchin dynein β-heavy chain was isolated and sequenced. The predicted amino acid sequence contained the sequence of authentic β-heavy chain and the ATP-binding consensus motif, which is located in the midregion of the molecule.
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  • Yoshio KATO, Yutaka TONEGAWA
    1991 Volume 67 Issue 3 Pages 32-36
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    A quasi-sinusoidal geomagnetic pulsation having a period of about 100-s is called pc4 and it is also associated with a storm sudden commencement. Concerning the problem of exciting mechanism, the authors compared the magnetic records obtained from the DE-1 spacecraft and the ground-based induction magnetograms obtained at Kanoya. Our conclusion is that the pulsations with 100-s period associated with ssc of magnetic storm are caused by global cavity resonance oscillations.
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  • Ken-ichi MAEDA
    1991 Volume 67 Issue 3 Pages 37-42
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    The conductivity elements, σ1(Pedersen) and σ2 (Hall) are derived, taking into account the coupling through collision between neutrals, ions and electrons. In the course of the above work the so-called generalized Ohm's law is obtained. By investigation of dynamo current it is found that the elements of conductivity tensor have their own phase. The velocity components have also their own phase and it is found that unexpectedly low altitude of the upper limit of the active dynamo layer revealed by rocket experiments, can be well understood when we notice the phase of the velocity components.
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  • Masaki FUKUDA, Keisuke TOKIMOTO
    1991 Volume 67 Issue 3 Pages 43-47
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    Electrophoretic patterns of nine enzymes from the mycelia of 93 wild strains of Lentinus edodes were analyzed to study the genetic variability in the natural population of the fungus. Seventy-one specimens came from Japan, ten from China, seven from Papua-New Guinea, and five from New Zealand. When the banding patterns of nine enzymes were compared among all strains, each strain showed its own distinct enzymatic type, except that two strains had the same type. A dendrogram based on the similarity coefficients calculated between strains was constructed by the group average method. All the Japanese strains constituted a single cluster together with all those of China. Two strain groups, those of Papua-New Guinea and New Zealand, were distinguishable from the cluster of Japan and China. These results suggest that geographical distance reduces the genetic similarity in the natural population of L. edodes.
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  • Kazuo YAMASAKI
    1991 Volume 67 Issue 3 Pages 49-55
    Published: 1991
    Released: October 13, 2006
    JOURNALS FREE ACCESS
    Six lead-barium glasses found in the archaeological sites of the Yayoi period in the northern part of Kyushu, Japan were chemically analysed and their lead isotope ratios were determined. These data agreed with those of the glasses of the Pre-Han period found in China, suggesting the presence of possible trade between China in the Pre-Han period (ca. fourth-third centuries B.C.) and Japan in the earlier Yayoi period (ca. first century B.C.).
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