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Volume 40, Issue 11
Displaying 1-9 of 9 articles from this issue
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Mitsuru EBIHARA, Naomi SAITO, Hideo AKAIWA, Kenji TOMURA1991Volume 40Issue 11 Pages 433-439
Published: November 15, 1991
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSUsing a radioactive tracer, 131I, analytical procedures were examined for the determination of iodine in rock samples by radiochemical neutron activation analysis using shortlived 128I According to the present results, iodine is easily lost during the preparation of reference standard samples unless iodine solution is efficiently alkaline (pH>10) and/or they are dried in a short time (e.g, ca. 30 min at 50 °C under a heat lamp) . It was confirmed that no iodine was lost when samples were soaked with conc. KOH solution containing iodine carrier, dried on a hot plate (ca. 100 °C) and then fused with a meckel burner. The revised procedures proposed here are expected to work effectively for the determination of ultra trace iodine in rock samples.View full abstractDownload PDF (910K) -
Yasuyuki MURAMATSU, Shigeo UCHIDA, Satoshi YOSHIDA1991Volume 40Issue 11 Pages 440-443
Published: November 15, 1991
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSIn order to assess the behavior of radioiodine in rice fields, we have performed laboratory experiments, using 125I tracer, on the desorption phenomena of iodine from soil during rice cultivation. Most of the 125I added to the soil was adsorbed by the soil solid phase at the beginning of the experiment. However, the iodine started to desorb into the soil solution with the growth of rice plants. The highest desorption rate of iodine was found around the flowering period, i.e, nearly 30% of the 125I was desorbed from Ando soil into the soil solution. In contrast to this, no particular increase in the iodine desorption was observed from the uncultivated flooded soil. It was suggested that rice plants had some influence upon iodine desorption from soil and the desorption also depended on the soil types.View full abstractDownload PDF (358K) -
Kyosan YOSHIKAWA, Junichi OKADA, Kimiichi UNO, Noboru ARIMIZU, Toshiyu ...1991Volume 40Issue 11 Pages 444-451
Published: November 15, 1991
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSPositron emission tomographic study (PET study) using 15O labeled gases was carried out in 108 patients with cerebrovascular diseases, tumor, cardiac diseases and others to evaluate the clinical usefulness of 15O labeled gas PET study.
The side-effect of 15O labeled gas was not odserbed in any cases, and 15O labeled gas PET study was judged to be highly safe technique.
Quantitative information with 15O labeled gas PET study was judged to be useful clinically in 94-96% of the cases. In comparison with other radionuclide images, X-ray CT and MRI, the information with 15O labeled gas PET study was tended to be superior or more useful to that with other imaging technique in 81% of cases.
15O labeled gas PET study was judged to be useful in 99% of the cases. It is concluded that 15O labeled gas PET study is a useful technique for quantitative measurement of regional tissue metabolism.View full abstractDownload PDF (1103K) -
Hidetoshi KOBAYASHI, Seiji SIBATA, Tieko KURATI, Sadayuki SAKUMA1991Volume 40Issue 11 Pages 452-454
Published: November 15, 1991
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSSplenic uptake in 67Ga scintigraphy was evaluated retrospectively in 296 patients, 379 examinations. 25% (54/220) in male and 38% (60/ 159) in female showed splenic uptake. 10% (22/220) in mate and 17% (27/159) in female showed splenic uptake as much as lumber vertebra. There was no significant relationship between high splenic uptake and clinical diagnosis. About half cases of high splenic uprake showed splenomegaly or liver dysfunction. But one third of high splenic uptake cases showed no abnormal findings. Close relationship between splenic up-take alteration and chemotherapy was suspected. The splenic distribution of 67Ga may be influenced by splenomegaly, liver dysfunction, and chemotherapy.View full abstractDownload PDF (4058K) -
Hideharu MATSUDA, Susumu MINATO1991Volume 40Issue 11 Pages 455-458
Published: November 15, 1991
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThermoluminescence characteristics of CaSO4: Tm (UD-100 M 8) elements were examined for α-rays from 241Am source to discuss a method for evaluating the energy absorbed by lung organization due to radon daughters using thermoluminescence dosimeters. As there are to some extent sensitivity difference among the elememts, it is necessary to make correction for the measured value by a factor determined for each element. It was found that the measured value was extremely well proportional to the absorbed energy of α-rays.View full abstractDownload PDF (414K) -
Yasuhiro YAMAGUCHI1991Volume 40Issue 11 Pages 459-460
Published: November 15, 1991
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (280K) -
Shozo KITO, Rie MIYOSHI1991Volume 40Issue 11 Pages 461-474
Published: November 15, 1991
Released on J-STAGE: July 21, 2010
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Yasuhito SASAKI1991Volume 40Issue 11 Pages 475-484
Published: November 15, 1991
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (4901K) -
1991Volume 40Issue 11 Pages A61P-A116M
Published: November 15, 1991
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (3109K)
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