RADIOISOTOPES

Effect of Small-Dose γ-Ray on Endogenous Antioxidant Enzymes in Mice

Osamu MATSUKI, Takaharu NOMURA, Shuji KOJIMA, Akiko KUBODERA, Kiyonori ...

1998 Volume 47 Issue 4 Pages 291-299
Published: April 15, 1998
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.291

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Effect of small-doseγ-ray on endogenous antioxidant enzymes, including superoxide dismutase (SOD) and catalase (CAT), was examined in brain and liver of mice. An increase ofCu/Zn-SOD activity was observed in both organs, particularly in brain, soon after irradiation with 50cGyofγ-ray. Mn-SODactivity was not altered in the brain, but contrary decreased in the liver post-irradiation. The activity of CAT was increased in both organs within 12hafter the irradiation. Moreover, MDA, a marker of lipid peroxidation, was siginicantly lowered in both organs, suggesting an induction of endogenous antioxidant potential following irradiation with a small dose ofγ-ray.

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Natural Background Radiation Intensity Inside and Outside a Highland Tibetan Private House (I)

Kunikazu NOGUCHI, Itsuro KUDO, Masaharu OKANO

1998 Volume 47 Issue 4 Pages 300-310
Published: April 15, 1998
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.300

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The radiation exposure rates were measured inside and outside a private house in the Tibetan Autonomous Region of China. As far as seen from the cosmic ray exposure rate and the gamma ray exposure rate, the indoor exposure rates can be classified into 3 groups: the 2nd floor, entrance to the 1st floor and in the rest of the 1st froor. In the 1st group, the mean cosmic ray exposure rate was 4.079nC/kg/h (15.81μR/h) and the mean gamma ray exposure rate was 4.515nC/kg/h (17.50μR/h) .In the 3rd group, the mean cosmic ray exposure rate was 2.740nC/kg/h (10.62μR/h) and the mean gamma ray exposure rate was 5.284nC/kg/h (20.48μR/h) .The reason why the cosmic ray exposure rate in the 3rd group is lower than in the 1st group is believed to be that cosmic rays are cut off by the construction materials. The reasons why the gamma ray exposure rate in the 3rd group is higher than in the 1st group are believed to be that the 3rd group is nearer to the ground than the 1st group and the stones of which the 1st floor walls are made have a higher concentration of natural radionuclides than the earth of which the 2nd floor walls are made. Both the cosmic ray exposure rate and the gamma ray exposure rate in the 2nd group are between those of the 1st group and the 3rd group. Futhermore, the authors calculated the air absorbed dose rates inside and outside a Tibetan private house and compared them with those of private houses in the world.

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Trial Apparatus for the Decontamination of Urine of a Large Number of Patients Treated with ¹³¹I

Toshiaki ABE, Naoki KUNUGITA, Toshiyuki NORIMURA, Takashi SAITO, Masay ...

1998 Volume 47 Issue 4 Pages 311-317
Published: April 15, 1998
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.311

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The trial apparatus manufactured for the decontamination of urine of patients treated with¹³¹Iconsists of two types of vessels, A and B. In the type of A, the urine is poured from the upper portion of the vessel and flows from the upper portion of the outer pipe of the vessel through a siphon. In the type of B, the urine is forced from the lower portion of the vessel and flows out from the upper portion. Type B vessel can be connected to B type vessel as well as to type A vessel.
Seven litters of charcoal mixed with resin was put into the A type vessel and the absorption rate of¹³¹Iin water was almost 100 percent after treatment by this type A vessel. The 5.5 litters of ion exchange resin was put into the B type vessel with an absorption rate was 99.9 percent after treatment by the B type.
These results show that this trial apparatus connecting vessels of type A and B can be practically used for the decontamination of urine of a large number of patients treated with¹³¹I.

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A New Access Control System by Fingerprint for Radioisotope Facilities

Hiroko KAWAMURA, Takahiro KONDO, Katsuhiro TAKATSUKI, Yasuki HIRATA

1998 Volume 47 Issue 4 Pages 318-323
Published: April 15, 1998
Released on J-STAGE: September 07, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.318

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We applied a new fingerprint checker for complete access control to the radiation controlled area and to the radioisotope storage room, and prepared softwares for the best use of this checker. This system consists of a personal computer, access controllers, a fingerprint register, fingerprint checkers, a tenkey and mat sensors, permits ten thousand users to register their fingerprints and its hard disk to keep more than a million records of user's access. Only 1 % of users could not register their fingerprints worn-out, registered four numbers for a fingerprint. The softwares automatically provide varieties of reports, caused a large reduction in manual works.

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Equipments and Instruments for Use in Radiological Protection. XVIII.Recent Advances of Nuclear Radiation Measuring Techniques for Use in Radiological Protection

3. Recent Advances of Portable Radiation Detectors

Kiyoshi NOMURA, Yukio HIRABAYASHI, Tadao MIYAMURA, Koji TAKAHASHI, Kaz ...

1998 Volume 47 Issue 4 Pages 324-335
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.324

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Synchrotron Radiation. III. Measurement by Synchrotron Radiation

6. Synchrotron X-Ray Fluorescence Spectrometry

Atsuo IIDA

1998 Volume 47 Issue 4 Pages 336-343
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.336

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7. Surface Structure Studies by X-Ray Dif-fraction

Junichiro MIZUKI

1998 Volume 47 Issue 4 Pages 344-352
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.344

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8.Compton Scattering

Nobuhiko SAKAI

1998 Volume 47 Issue 4 Pages 353-362
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.353

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5. Foods

Toru HAYASHI

1998 Volume 47 Issue 4 Pages 363-373
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.363

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[title in Japanese]

[in Japanese]

1998 Volume 47 Issue 4 Pages 375-376
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.375

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[title in Japanese]

[in Japanese], [in Japanese]

1998 Volume 47 Issue 4 Pages 377-378
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.377

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[title in Japanese]

[in Japanese]

1998 Volume 47 Issue 4 Pages 379-382
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.379

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[title in Japanese]

[in Japanese]

1998 Volume 47 Issue 4 Pages 383-385
Published: April 15, 1998
Released on J-STAGE: July 21, 2010

DOIhttps://doi.org/10.3769/radioisotopes.47.383

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