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Volume 34 (1992)
- Issue 6 Pages 339-
- Issue 5 Pages 271-
- Issue 4 Pages 221-
- Issue 3 Pages 167-
- Issue 2 Pages 49-
- Issue 1 Pages 1-
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Volume 34, Issue 6
Displaying 1-6 of 6 articles from this issue
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Akio TAKENAKA1992 Volume 34 Issue 6 Pages 339-346
Published: December 25, 1992
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSCoat proteins of tobacco mosaic virus (TMV) recognize the sequence of AAG on RNA at the initiation of assembly and then bind to any nucleotides during elongation. To understand the molecular mechanism of such specific and non-specific interactions, we studied the elementary interaction patterns by using model crystals which contain amino-acid side chains and nucleic-acid bases. It was found that the carboxyl group tends to form a double hydrogen bond to all kinds of bases at the sites where Watson-Crick type pairing usually occurs. This common structural feature is effective to non-specific binding, because there is no need to move largely for polypeptide chain. Hydrogen bond energies calculated by molecular orbital methods indicate the strongest interaction with guanine in the order of G > C ≅ A > U ≅ T. These data, together with other elementary interactions, are then applied successfully to construct a binding model of the coat proteins with RNA. Reassembly experiments of TMV using di- and tri-nucleotides supported the model.View full abstractDownload PDF (3558K) -
Hideki MAEKAWA1992 Volume 34 Issue 6 Pages 347-353
Published: December 25, 1992
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSUnderstanding of the physical and chemical properties of silicate melts in terms of the molecular structures is a fundamental problem for geology, glass science and steel making process. In this paper, examples of recent applications of 17O, 29Si, 27Al NMR to silicate glasses and melts up to 1400°C are described to show problems and present level of understanding.View full abstractDownload PDF (781K) -
Hiromoto NAKAZAWA1992 Volume 34 Issue 6 Pages 354-358
Published: December 25, 1992
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSSingle crystals of smectite have been synthesized by quenching a hydrous melt at very high pressure and temperatures (e.g.5.5 GPa and 1600t) . The starting material was a glass with composition of a dehydrated smectite. A dominant phase of the quenched products was smectite identified by X-ray diffraction before and after intercalation of ethyleneglycol. Thin fragments of the smectite cleaved by water for electron microscopic observation were single crystals in the forms of extremely thin ribbons, laths and plates having partly hexagonal edges.View full abstractDownload PDF (2464K) -
Tooru ATAKE1992 Volume 34 Issue 6 Pages 359-364
Published: December 25, 1992
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSRecent studies have been reviewed on the thermal properties of the new substance C60. Molecular motion and phase tansition phenomena are discussed in detail focusing attention on the effects of the solvents remaining in the sample.View full abstractDownload PDF (632K) -
[in Japanese]1992 Volume 34 Issue 6 Pages 365-366
Published: December 25, 1992
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSDownload PDF (289K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]1992 Volume 34 Issue 6 Pages 367-368
Published: December 25, 1992
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSDownload PDF (281K)
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