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Volume 48, Issue 8
Displaying 1-8 of 8 articles from this issue
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Md Khorshed ALAM, Setsuko TODOROKI, Mikiro TADA, Naiyyum CHOUDHURY, Na ...1999Volume 48Issue 8 Pages 509-513
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSDecomposition of fatty acid hydroperoxide is found to be proportional to the radiation dose. A dose of 20 kGy was found to decompose the hydroperoxide by 98%. Addition of phenolic antioxidants at 4.5 mM could not prevent the decomposition at 20 kGy but the phenolic antioxidants at 20 mM prevented the decomposition.View full abstractDownload PDF (440K) -
Hisao YAMAMOTO, Toshiyuki NORIMURA, Akira KATASE1999Volume 48Issue 8 Pages 514-521
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSConcentrations of 40K, thorium and uranium contained in the front glass of CRT (cathode ray tube) of television sets are measured by the γ-ray spectrometry. Although the obtained concentrations of thorium and uranium show the difference more than twice as much depending on the manufacturers, those of 40K are almost equal for all CRTs. The dose rates are estimated for the CRT. Even the dose rate for the highest concentration of thorium and uranium is smaller than about one-tenth of that for the background radiations. It is practically negligible at a distance larger than 20 cm from the surface of the front glass of CRT.View full abstractDownload PDF (698K) -
—An Observation at Seoul, the Republic of Korea—Shin SATO, Taeko DOI, Jun SATO1999Volume 48Issue 8 Pages 522-529
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSA temporal increase in the atmospheric concentration of 210Pb was observed in December, 1991, and January, 1992, at Seoul, the Republic of Korea. This increase was estimated to be due to the fallout of the stratospheric 210Pb originating from the 1991 eruption of Pinatubo volcano, Philippines, along with the aerosol particles injected into the stratosphere by the eruption. The present observation was similar to the previous observations made at Tsukuba Science City, Japan.View full abstractDownload PDF (821K) -
Midori IWASAKI, Chyuzo MIYAZAWA, Teruo UESAWA1999Volume 48Issue 8 Pages 530-534
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSExperiment on the effect of tooth position in oral cavity for various irradiation geometries was performed by using a human head phantom containing 32 permanent teeth. The head phantom was connected with the upper part of Rando phantom and irradiated by 60Co gamma-rays with anteroposterior (AP), posteroanterior (PA) and right lateral (RLAT) geometries. Exposure for AP geometry was about 1290×10-4C/kg (500 R) at the labial side of upper central incisors, while for PA and RLAT geometries the phantom was turned by 180 and 90 degrees, respectively, and irradiated for the same period of time as for AP geometry.
Although an established trend on the whole was found, correlation between dose of tooth enamel and its location in the oral cavity was not strong at least for high energy gamma-rays from 60Co (average 1.25 MeV) .View full abstractDownload PDF (2222K) -
Katsuhiko ISHIGURO1999Volume 48Issue 8 Pages 535-546
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSDownload PDF (3290K) -
9. Application of Digital Micro Radiography System in the Bone MorphologyYoshitake FURUTA, Kuniaki FUKUDA1999Volume 48Issue 8 Pages 547-553
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSDownload PDF (4535K) -
[in Japanese]1999Volume 48Issue 8 Pages 555-556
Published: August 15, 1999
Released on J-STAGE: March 10, 2011
JOURNAL FREE ACCESSDownload PDF (234K) -
Subcommitee of Radionuclide Imaging and Nuclear1999Volume 48Issue 8 Pages i-xxvii
Published: August 15, 1999
Released on J-STAGE: March 14, 2011
JOURNAL FREE ACCESSDownload PDF (2627K)
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