Showing papers by "Aoyama Gakuin University published in 1971"
7 citations
TL;DR: Observations seem to suggest that the primary structure or peptide bonds in a certain amino acid sequence may be more effective in stabilizing the helix than the disulfide cross-linkages of the protein molecule.
7 citations
TL;DR: In this paper, the effect of point defects on nucleation and epitaxial growth of gold deposits on the cleavage surfaces of alkali halide crystals was studied as a function of substrate temperature and incidence rate, and the results indicated that selective nucleation occurs on imperfection sites such as point defects and impurities, and that random nucleation occurred on defect-free surfaces at a relatively higher deposition rate.
4 citations
01 Sep 1971
TL;DR: In this article, the Pariser-Parr-Pople calculations with a variable β approximation were carried out for 9-methylanthracene and 1-hydroxyphenazine.
Abstract: Dichroic spectra of 9-methylanthracene and 1-hydroxyphenazine were measured in stretched PVA (polyvinylalcohol) sheets. For 9-methylanthracene, the divided spectra were obtained by using the results of the dichroic spectra. The Pariser-Parr-Pople calculations with a variable β approximation were carried out for the above compounds. It was found that 9-methylanthracene has five absorption bands at 392 mμ (C2-axis polarization, y-axis), 370 mμ (x), 280 mμ (y), 260 mμ (x), and about 220 mμ (y). A band corresponding to the 280 mμ band is not observed in the case of anthracene. This band may correspond to the forbidden transition (Ag Ag) of anthracene. This is also suggested by the MO calculation, that is, the forbidden transition of anthracene becomes allowed one by the introduction of the methyl group at the 9-carbon atom, in which the effects of the methyl group are treated as inductive. Also in the case of 1-hydroxyphenazine, an extra band corresponding to the forbidden transition of phenazine was found at 300 mμ.
Es wurden Dichroismus-Spektren von 9-Methylanthracen und 1-Hydroxyphenazin in gestreckten PVA (Polyvinylalkoho1)-Folien aufgenommen. Fur 9-Methylanthracen wurden daraus die getrennten Spektren gewonnen. Pariser-Parr-Pople-Rechnungen in einer Naherung mit variablem β wurden fur beide Verbindungen durchgefuhrt. Beim 9-Methylanthracen wurden 5 Absorptionsbanden folgender Wellen-lange und Polarisationsrichtung gefunden: 392 mμ (C2-, y-Achse); 370 mμ (x); 280 mμ (y); 260 mμ (x); ungefahr 220 mμ (y). Im Spektrum des Anthracens wird keine der 280 mμ-Bande entsprechende Bande beobachtet. Diese Bande konnte dem beim Anthracen verbotenen Ubergang (Ag Ag) entsprechen. Die MO-Rechnung stutzt diese Vermutung; es ergibt sich namlich, das der verbotene Ubergang beim Anthracen erlaubt wird, wenn eine rein induktiv wirkende Methylgruppe am Kohlenstoffatom 9 eingefuhrt wird. Auch im Fall des 1-Hydroxy-phenazins wurde bei 300 mμ eine zusatzliche Bande gefunden, die einem verbotenen Ubergang beim Phenazin entspricht.
3 citations
01 Jan 1971