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Volume 64 (2001)
- Issue 6 Pages 337-
- Issue 5 Pages 292-
- Issue 4 Pages 234-
- Issue 3 Pages 161-
- Issue 2 Pages 65-
- Issue 1 Pages 1-
Volume 64, Issue 4
Displaying 1-6 of 6 articles from this issue
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Yoshiro YONEZAWA, Noritsugu KOMETANI, Kenji ASAMI, Hideaki NADA, Hiros ...2001 Volume 64 Issue 4 Pages 234-241
Published: August 25, 2001
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSLangmuir-Blodgett (LB) films containing the J-aggregate of anionic cyanine dyes; dye I, dye II, dye III, were fabricated for the first time by the adsorption method. A monolayer of dimethyldioctadecyl ammonium bromide (DDA) was formed at the surface of the water subphase containing 10-6 M dye to adsorb dye molecules. Absorption spectra of the DDA/dye LB films deposited on the quartz plate by the vertical deposition technique were characterized by the distinct J-band and resonance fluorescence. The mixed LB films incorporating two kinds of dyes; dye I: dye II, dye II: dye III, were fabricated and spectral properties were examined. Observations of two J-bands and two peaks of resonance fluorescence inherent to two dye molecules would suggest that those dye combinations can form S-M-type aggregates. Quenching of donor (dye I, dye II) fluorescence and sensitization of acceptor (dye II, dye III) fluorescence were analyzed with the help of Perrin-type kinetics, yielding the Perrin area Σ of 125nm2 (dye I: dye II aggregate), 4.8 nm2 (dye II: dye III aggregate). Based on the dependences of the spectral shift of the J-bands, the normalized fluorescence intensities of donor and acceptor aggregates, as well as the magnitude of Σ, it is proposed that the dye I: dye II combination forms the mosaic-type (M-type) aggregate for small molar fraction X and the separate-type (S-type) aggregate for larger X. In contrast, the dye II: dye III combination can form the S-type aggregate for almost all X region of our interest.View full abstractDownload PDF (988K) -
Kenichi KUGE, Kenichi KIMIJIMA, Michiko ARISAWA, Naokazu AOKI, Akira H ...2001 Volume 64 Issue 4 Pages 242-245
Published: August 25, 2001
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSWhen an exposed photographic film is immersed in a gold (I) thiocyanate complex solution, gold clusters grow on latent image specks. The reduction reaction of gold (I) ions was analyzed with atomic absorption spectrometry. Amount of gold (I) ions in the solution decreased to about 1/3 of the initial amount and then saturated. We concluded that the deposition of gold atoms proceeds with disproportionation reaction of gold (I) ions.View full abstractDownload PDF (550K) -
Kazunobu KATOH, Kouji KAWATO2001 Volume 64 Issue 4 Pages 246-254
Published: August 25, 2001
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSIn hydrazide nucleated infectious development, it is understood that theactive species is a diazen, which will be oxidized to a diazonium salt after the electron injection.
In this paper, we analyzed the physical and chemical properties of the diazonium salt, the chemical reactivity and the photographic properties. The diazonium salt is very active at the reaction to the acylhydrazide or to the diazen, and then has significantly important role in the hydrazide nucleated infectious development.View full abstractDownload PDF (977K) -
Keiji UETSUKI, Norimichi TSUMURA, Nobutoshi OJIMA, Yoichi MIYAKE2001 Volume 64 Issue 4 Pages 255-263
Published: August 25, 2001
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSWith the recent progress in various imaging systems, facial skin color reproduction becomes increasingly important. Human skin is a very turbid medium with multilayered structure. Various pigments such as melanin and hemoglobin are contained in the skin. Slight changes in structure and pigment construction produce rich skin color appearance. In this research, we reproduce various facial skin color by changing amount of melanin and hemoglobin components. The spatial distributions of melanin and hemoglobin components in the skin are separated by independent component analysis of skin color. The separated components are synthesized to reproduce the various facial color images by changing amount of separated pigments. The synthesized images are evaluated subjectively by comparing with the original facial image. Correlation maps are analyzed between appearance of facial color images and amount of melanin and hemoglobin components in the facial skin. From these analysis, we could find that how changes of melanin or hemoglobin components influence the appearance of facial color image.View full abstractDownload PDF (18685K) -
Sadako TANI2001 Volume 64 Issue 4 Pages 264-266
Published: August 25, 2001
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe applicability of a polysaccharide, pullulan, as a molecular weight standard for a gel permeation chromatogram of gelatin was investigated. It was confirmed that pullulan has a weak UV absorption that is detectable with a conventional UV detector at 230 nm, whereas a differential refractmeter is in general used for the detection. The relationship between molecular weight and retention time for standard pullulan samples was obtained. The retention time of α, β, and γ chains of gelatin lied on the curve reasonably. Pullulan is suitable as the molecular weight standard for gel permeation chromatographic analysis of gelatin with the conventional setup.View full abstractDownload PDF (335K) -
Kenji TOYODA2001 Volume 64 Issue 4 Pages 267-271
Published: August 25, 2001
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (4897K)
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