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Volume 49, Issue 1
Displaying 1-9 of 9 articles from this issue
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1986 Volume 49 Issue 1 Pages 5-6
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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Takeo KOITABASHI1986 Volume 49 Issue 1 Pages 7-12
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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Sensitization of AgBr Particles. A Heterogeneous Photochemical ApproachTadashi WATANABE, Takuo TAKIZAWA, Osamu KAWANAMI, Kozo KURITA, Kenichi ...1986 Volume 49 Issue 1 Pages 13-20
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSVisible illumination to a rhodamine B (RhB) aqueous solution containing powdery AgBr results in N-deethylation of RhB and formation of metallic Ag in AgBr. The formal quantum efficiencies for these two processes, FQE (-Et) and FQE (Ag), have been measured under various conditions. In O2-free suspensions the ratio FQE (Ag)/FQE (-Et) was roughly 2. This establishes a stoichiometry of [reduced Ag+]/[injected electron]≅1, because single N-deethylation requires removal of two electrons from a RhB molecule. Aeration of the suspension did not affect FQE (-Et), but significantly lowered FQE (Ag) due to the competition for electron capture between interstitial Ag+ and surface-adsorbed O2. Doping of AgBr with Cd2+ influenced FQE (-Et) in O2-free suspensions. For nine photographic dyes, a good correlation exists between the interfacial energetics and the FQE (Ag) value by visible illumination; a highest value (≅8%) of the latter was found for erythrosine in an O2-free medium. Three desensitizing dyes, methylene blue, phenosafranine, and malachite green, gave FQE (Ag)≅0 at 580-600 nm, but suppressed the FQE (Ag) value at an intrinsic absorption wavelength of AgBr (435nm).View full abstractDownload PDF (1137K) -
A Correction Equation for Determining Optical Density of Dyestuff with Multi-ReflectionTomoo OHSHIMA1986 Volume 49 Issue 1 Pages 21-24
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSOptical density of dyestuff is erroneously determined when the dyestuff accompanies with multireflection which takes plase within, for example, a paper in which the dyestuff is imbedded.
A correction equation is introduced which eliminates the affect of multi-reflection.
The result of this experiment may be applied to the printing and other imaging processing.View full abstractDownload PDF (437K) -
Nobuo MII1986 Volume 49 Issue 1 Pages 25
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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Yasushi OISHI1986 Volume 49 Issue 1 Pages 26-31
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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Takao NIMURA1986 Volume 49 Issue 1 Pages 32-38
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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Shigeyoshi SUZUKI1986 Volume 49 Issue 1 Pages 39-45
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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[in Japanese]1986 Volume 49 Issue 1 Pages 58-64
Published: February 28, 1986
Released on J-STAGE: August 11, 2011
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