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Volume 45, Issue 12
Displaying 1-15 of 15 articles from this issue
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Shigeki TASAKA, Yoshimi SASAKI1996 Volume 45 Issue 12 Pages 741-752
Published: December 15, 1996
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSA small-sized radon data logger and a electrostatic collecting radon monitor were developed for the continuous monitoring of environmental radon and radon daughters. A PIN photodiode (PD), an alpha particle detector, installed inside a container attracts radon daughters when charged electrostatically. Alpha particles are completely separated from each other according to the energy level. New logger has made it possible to analysis and save the radon data. Alpha particle count data from radon daughters are automatically integrated over preset time intervals and the energy regions. The desiccant P2O5 was placed in the bottom of the monitor, since the collection efficiency of 218Po atoms depends on the humidity of the air. We can get the 30 days continuous data logging at 30 min sampling frequency at any place with the car battery. We observed the radon concentration of the air inside the Super-Kamiokande dome from Jan-30 to Feb-8-1996. The average of radon concentration was found to be (46±13) Bq/m3.View full abstractDownload PDF (1217K) -
Tadao TANAKA, Susumu MURAOKA1996 Volume 45 Issue 12 Pages 753-760
Published: December 15, 1996
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSIn order to clarify influence of pH-buffer action of soil on desorption behavior of radionuclides adsorbed on a soil, a batch type desorption experiment, in which a coastal sand adsorbed 60Co was contacted with an aqueous solution of 4, 7 or 10 in pH, was performed.
When pH of the solution became higher, the desorption ratio of 60Co from the sand to the solution decreased, while the abundance ratio of non-cationic 60Co species increased. Relationship between the pH of solution and the desorption ratio of 60Co could been explained by a pH dependency of negative charge density on the sand surface. It was found that the non-cationic 60Co species in the solution was colloidal {60Co (OH) 2} n, which was formed by hydrolysis of 60Co2+ at buffered pH.View full abstractDownload PDF (882K) -
Takashi MARUYAMA, Kazuo IWAI, Kanae NISHIZAWA, Yutaka NODA, Yoshikazu ...1996 Volume 45 Issue 12 Pages 761-773
Published: December 15, 1996
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSEffective doses and collective effective doses from X-ray diagnostic examinations were calculated on the basis of the frequency of examinations estimated by a nationwide survey and the organ or tissue doses experimentally determined. The average organ or tissue doses were determined with thermoluminescence dosimeters put at various sites of organs or tissues in an adult and a child phantom. Effective doses (effective dose equivalents) were calculated as the sum of the weighted equivalent doses in all the organs or tissues of the body.
As the examples of results, the effective doses per radiographic examination were approximately 7mGy for male, and 9 mGy for female angiocardiography, and about 3 mGy for barium meal. Annual collective effective dose from X-ray diagnostic examinations in 1986 were about 104×103 person Sv from radiography and 118×103 person Sv from fluoroscopy, with the total of 222×103 person Sv.View full abstractDownload PDF (1302K) -
Itaru SATO, Takako YONETA, Naonori MATSUSAKA, Haruo KOBAYASHI, Shuji T ...1996 Volume 45 Issue 12 Pages 774-779
Published: December 15, 1996
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSFemale mice on gestational day 17 were injected intravenously with a single dose of 54Mn or 65Zn solution, and organ distributions of these radionuclides in the fetuses were studied 3, 6, 24 and 48 hours after administration using gamma counting and macroautoradiography. The fetuses of a litter incorporated 19% of the administered 54Mn and 50% of the administered 65Zn in the uterus. The pancreas showed the highest concentration of 54Mn in fetuses, followed by the gastrointestinal tract, kidneys and liver. 54Mn distribution pattern in fetuses was similar to that in dams, but the uptake in the bone and brain seemed to be greater in fetuses than in adults. 65Zn was markedly accumulated in the fetal liver, while no detectable amount of 65Zn was found in the brain. Although fetal distribution of 65Zn was similar to maternal one, 65Zn concentrations in fetal tissues were generally higher than those in dams.View full abstractDownload PDF (1907K) -
Daisuke OGAWA, Yoshifumi SAKURAI, Osamu YAMADA1996 Volume 45 Issue 12 Pages 780-783
Published: December 15, 1996
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe air pollution caused by CO2 from fossil fuel origin was quantitatively studied by radiocarbon (14C) measurement on the samples of new leaves taken from roadside trees. In the area where concentration of CO2 (12CO2+13CO2) of fossil fuel origin was high, the count of β-ray radiation from 14C tended to be low. The relation between the concentration of sulfur dioxide (SO2) in the air and the count of β-ray radiation from the leaf samples could be represented by a linear regression,
Y= (17.568/X) -67.385; r = -0.995
Where Y is the SO2 concentration in ppb and X is the β-ray radiation count (Bq/g-carbon) .View full abstractDownload PDF (334K) -
Shigeo UCHIDA, Keiko TAGAMI, Takashi FUJIKAWA1996 Volume 45 Issue 12 Pages 784-787
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (388K) -
Masafumi YAMAMOTO1996 Volume 45 Issue 12 Pages 788-801
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (1935K) -
1. Neutron Scattering Method on Steady SourceYasuhiko FUJII1996 Volume 45 Issue 12 Pages 802-807
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (2778K) -
Susumu IKEDA1996 Volume 45 Issue 12 Pages 808-812
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (428K) -
Nobuo NIIMURA1996 Volume 45 Issue 12 Pages 813-819
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (4351K) -
[in Japanese]1996 Volume 45 Issue 12 Pages 821-822
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (253K) -
[in Japanese]1996 Volume 45 Issue 12 Pages 823-824
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (284K) -
[in Japanese]1996 Volume 45 Issue 12 Pages 825-826
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (347K) -
[in Japanese]1996 Volume 45 Issue 12 Pages 827-829
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (371K) -
Subcommitee of Nuclear Medicine Technology1996 Volume 45 Issue 12 Pages i-xxxi
Published: December 15, 1996
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (3253K)
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