Japanese Journal of Health Physics
Online ISSN : 1884-7560
Print ISSN : 0367-6110
ISSN-L : 0367-6110
Search
Advanced search
OR
Browse
Search
Volume 9, Issue 1
Displaying 1-3 of 3 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • A New Computational Model for Deposition of Aerosol Particles Inhaled in Human Respiratory Systems
    Kanji TAKAHASHI, Harumi ITO
    1974 Volume 9 Issue 1 Pages 3-10
    Published: 1974
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.9.3
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A new computational model for deposition of particles inhaled in human respiratory systems were proposed. Weibel's model was used as a standard human lung. The calculations were performed by the similar method to Landahl's, Beeckmans' and others', with the exception of newly proposed equations for the particle deposition by impaction in the diverged parts and by tranquil diffusion in the straight parts. The calculated results were somewhat different from the ICRP's, and some examples of regional distributions of particle deposition in human lung were shown.
    View full abstract
    Download PDF (888K)
  • Removal of 137Cs from Aqueous Solutions by Zeolite
    Kiyoshi KATO
    1974 Volume 9 Issue 1 Pages 11-16
    Published: 1974
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.9.11
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    For the purpose of using zeolite together with polymer coagulant in the chemical treatment of low-level radioactive liquid wastes, the experiments were carried out on the removal of 137Cs by natural zeolite under different conditions.
    Cation exchange capacities of natural zeolites produced in Japan were determined on powdered condition by means of batch method. Results obtained show that cation exchange capacities of natural zeolites, clinoptilolite and mordenite are 134-156meq Cs+/100g and 170-183meq Cs+/100g, respectively.
    The removal of 137Cs by the zeolite which had the highest cation exchange capacity among them tested, was studied. The removal efficiency of both natural and Na-form zeolite was more than 95% under the following condition: concentration of 500ppm, pH of 2-11, Na+<250ppm, K+<50ppm, NH4+<25ppm, Ca2+<1, 000ppm and Cs<10-4M/l as a carrier. The removal efficiency from tap water was about 99% with 250ppm of zeolite. The combined use of 500ppm zeolite and 5ppm nonionic polymer coagulant was particularly effective for the removal of 137Cs.
    View full abstract
    Download PDF (565K)
  • Accidental Exposure to Iridium-192
    Toshiyuki KUMATORI, Yoshio KATO
    1974 Volume 9 Issue 1 Pages 17-21
    Published: 1974
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.9.17
    JOURNAL FREE ACCESS
    Download PDF (2275K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top