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Volume 27 (1964)
- Issue 4 Pages 159-
- Issue 3 Pages 105-
- Issue 2 Pages 54-
- Issue 1 Pages 1-
Volume 27, Issue 2
Displaying 1-6 of 6 articles from this issue
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Haruo KATO1964 Volume 27 Issue 2 Pages 54-62
Published: October 20, 1964
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESS“The blurring effect of the phot ographic image”, which was excluded up to now from an object for measurement, has come to be treated theoretically by establishing the photo-optical definitions and the theoretical systems composed of those definitions as shown in the first Report.
Moreover, for such problem as the blurring effect that arises on the print and causes the observer some other heterogeneous psychological effect than normal impression, we cannot expect satisfactory result only by the study in physical fields made in the past. Here comes a scientific system, “Psychophysics”.
Thus in the present Report I shall describe the results discussed and measured by psychometrical method of the blurring effect.
The said Report shows the “Alphabetical Classification” of images by the pinhole method for qualitative measurement on the basis of the blurring patterns, and by the measurement of blurring physical values for quantitative measurement and the expression thereof, and finally shows the results measured by the Constant Method in psychometry of the blurring critical value to be observed on the print, or stimulus threshold.View full abstractDownload PDF (11251K) -
Haruo IRIE, Michihiro OTO1964 Volume 27 Issue 2 Pages 63-67
Published: October 20, 1964
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSStudies on the Vogel's reaction are reviewed. The authors propose a modified Vogel's test method for photographic gelatines in which Vogel's reagent is used in one fiftieth volume of 2% gelatine solution, while in the conventional method the reagent and gelatine solution are used in equal volume.
Turbidities are measured at 5 minutes after addition of the reagent into gelatine solution at 30° and after 3 hours ripening at 60°, followed by an addition of 0.3 cc concentrated ammonia and again turbidity is measured each time.
By this method, among precipitates of of Vogel's reaction soluble and insoluble components to ammonia can be discriminated.
Sixteen gelatines are tested by the method and results are discussed.View full abstractDownload PDF (692K) -
Masami KAWASAKI, Takaaki OTSU1964 Volume 27 Issue 2 Pages 68-74
Published: October 20, 1964
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe effects of 60Co gamma-ray irradiation on commercial nuclear emulsions were studied at five different temperatures (+50°C, +20°C, 0°C, -10°C and -75°C).
The exposed emulsions were developed by ID-19 type developer (1: 2) for 15 or 20 minutes at 20°C, and then fixed by sodium ammonium thiosulfate fixer. The fixing time was 30 minutes for 15μ thick emulsions and 90 minutes for 50 μ thick emulsions.
Among the nuclear emulsions used, the cobalt-60 gamma-ray sensitivity of proton sensitive emulsions lay between several roentgens and several tens of roentgen, and that of the electron sensitive emulsions was several handreds of milliroentgen.
The reduction of density by temperature change of irradiation was more pronounced on the proton sensitive emulsions than that of the electron sensitive ones.
For most nuclear emulsions, the maxima of the sensitivity for the variation of temperature appeared at 20°C, but in some emulsions it appeared at 0°C or -10°C.View full abstractDownload PDF (2940K) -
Shin SUZUKI1964 Volume 27 Issue 2 Pages 75-80
Published: October 20, 1964
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSThe electrophoresis of thiourea (I), thiosemicarbazide (II), p-succinoyl aminobenzaldehyde-3-thiosemicarbazone (III), guanidine (IV), benzalacetone guanilhydrazone (V) were measured on the paper which was wetted by the buffer solution containing potassium bromide. The pH of the buffer solution were varied at the range of 3-9. The concentration of potassium bromide in the buffer solution was 10-3 M. I and II showed positive ionic behaviour at below pH 7, while negative ionic behaviour at the higher pH. III showed faint negative ionic or neutral molecular behaviour at below pH 6, and remarkable negative ionic behaviour at the higher pH. V showed a separation of bands to two bands by electrophoresis. These two bands of V and IV showed positive ionic behaviour at all range of pH (3-9). No effects of addition of potassium bromide in the medium on the electrophoresis of each compound were deduced.View full abstractDownload PDF (657K) -
1964 Volume 27 Issue 2 Pages 80
Published: 1964
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSDownload PDF (119K) -
Yasuo NAKAGAWA, Yoshihisa KUNITOMO, Hideya FURUTA1964 Volume 27 Issue 2 Pages 81-87
Published: October 20, 1964
Released on J-STAGE: August 11, 2011
JOURNAL FREE ACCESSEffects of exposure of diazo papers to various radiation sources have been measured.
Experiments were conducted on three types of diazo papers, with different spectral sensitivity, using three types of radiation sources with varying spectral energy distribution, namely, xenon short arc lamp, mercury lamp, ultra violet fluorescent lamp.
Measurement of irradiance on diazo paper surfaces have mode by photoelectric detector, which has similar spectral sensitivity for typical diazo papers. The photoelectric detector consisted of a combination of Sb-Cs phototube (spectral sensitivity: S 5) and colored glass filters.
The exposure method used in such measurements was a time scale exposure.
The results are summarized in the following:
(1) There was no change in the height order of sensitivity for the three diazo papers with any of the differing radiation sources.
(2) The shape of characteristic curves of diazo papers showed no change, regardless of type of radiation sources.
(3) At exposure test, irradiance on diazo paper surfaces was kept constant for all radiation sources by use of the photoelectric detector reading (sensitivity region of detector being 3400-4600 A maximum wavelength 3900A) and the deflection of exposure time for the three diazo papers was approximately 10%.
Results of exposure tests by xenon lamp for ten diazo papers commercially available are described in this report.View full abstractDownload PDF (924K)
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