RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 19 , Issue 12
Showing 1-16 articles out of 16 articles from the selected issue
  • Shigeru OHNO, Michihiko YATAZAWA
    1970 Volume 19 Issue 12 Pages 565-569
    Published: December 15, 1970
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Arsenic and antimony have been determined in several soil samples by neutron activation analysis. A simple and rapid procedure for the determination of arsenic and antimony in soil is presented. After the alkali fusion, the irradiated sample was dissolved in slightly acid solution and then arsenic was precipitated with quinoline molybdate solution. And antimony was separated as antimony sulphide.
    The precision of this method was calculated from analysis of standard specimen to be about ± 8% and the sensitivity of this method was estimated as 0.005 ppm for arsenic and 0.01 ppm for antimony. This method is also applicable to both geological and biological samples.
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  • Hikoyuki YAMAGUCHI, Kyoko MIURA
    1970 Volume 19 Issue 12 Pages 570-573
    Published: December 15, 1970
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Aqueous solutions of IAA in the presence or the absence of oxygen were irradiated with 137Cs gamma radiation. The apparent oxygen effect on the loss of biological activity of IAA was not observed. As the concentration of IAA was increased, a smaller proportion of them was affected. Both ethanol and potassium iodide protected almost completely the radiolysis of IAA irradiated in aqueous solution. It was concluded that OH radicals produced in the aqueous solution must produce harmful damage to IAA.
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  • Kiyoshi TENSHO, Ko-Ling YEH
    1970 Volume 19 Issue 12 Pages 574-579
    Published: December 15, 1970
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    In order to substantiate the hypothetical view that the iodine toxicity is responsible for the “Reclamation-Akagare” disease of lowland rice, a study on iodine and bromine in soil-plant system was performed by means of activation analysis and tracer technique.
    The soils in volcanic ash origin from Kanto district contained 14 to 23 ppm I and 55 to 139 ppm Br, and the ratios of I/Br were from 0.12 to 0.41. According to an incubation test using an Akagare-soil of Nishinasu, the oxidative retention and reductive liberation of soil iodine was well recognized, and the maximum of 60 to 70% of soil iodine was released under submerged condition, resulting in about 4 ppm I in soil solution.
    A plant culture test of rice revealed that the availabilities of iodine and bromine in soil as well as the applied 131I were highly variable due to soil conditions, such as moisture status, accompanied chloride and calcium addition. Among these treatments, soil submergence was most predominant for increasing their uptake by root, especially in iodine. In the case of Nishinasu soil, the contents in dried plant ranged from 1.3 to 341 ppm I and from 46 to 2170 ppm Br.
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  • Teiichiro TAKAHASHI, Tsunahisa YOKOI, Hiroshi ITOH, Tadashi MIYAHARA, ...
    1970 Volume 19 Issue 12 Pages 580-588
    Published: December 15, 1970
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    By the use of 99mTc-pertechnetate, we performed brain scans in a series of patients with brain tumors (39 cases), neurosurgical diseases (5 cases), cerebral vascular diseases (55 cases) and miscellaneous lesions affecting the central nervous system in order to evaluate reliability and accuracy of this diagnostic procedure from the clinical point of view.
    Positive scans were obtained in 31 out of 39 brain tumor cases including astrocytomas grade I, II, III, and IV, meningiomas, metastatic tumors, pinealomas and hemangioblastomas, and in 4 out of 5 neurosurgical diseases including brain abscess, hydrocephalus, and hygroma. Except metastatic lesions, pathological diagnosis was impossible from the scans.
    Also, cerebral vascular diseases (C.V.D.) were demonstrable in 29 out of 55 patients with cerebral hemorrhage, cerebral thrombosis, transient ischemic attack, arteriovenous malformation, subarachnoid hemorrhage, subdural hematoma, S.L.E. vasculitis and aortic arch syndrome.
    In C.V.D., the lesions may be poorly demonstrable within one week after the onset of the disease, while positive scans may be obtained with the highest frequency at 2 or 3 weeks. However, it turned out to be impossible to detect the lesions at three months except S.L.E. vasculitis, and when successfully detected, associated hematoma or tumor was suspected. There was a definite correlation between scan interpretations and clinical manifestations. Characteristically, C.V.D, lesions have usually faint, diffuse, irregular areas of increased radioactivity.
    Thus, the brain scan with 99mTc-pertechnetate is an examination of a great clinical importance permitting to detect the localization and extent of invasive lesions, in addition, to reveal associated intracranial lesions.
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  • Atsushi ANDO, Kin-ichi HISADA
    1970 Volume 19 Issue 12 Pages 589-596
    Published: December 15, 1970
    Released: September 07, 2010
    JOURNALS FREE ACCESS
    Three preparations of 203Hg-acetate, 203Hg-chlormerodrin and 203Hg-EDTA were injected intravenously to each group of rats transplanted subcutaneously with Yoshida sarcoma. These rats were sacrificed 3 hours, 12 hours, 48 hours and 72 hours after injection of 203Hg-acetate and 203Hg-chlormerodrin and were sacrificed 3 hours, 24 hours and 48 hours after injection of 203Hg-EDTA. The radioactivities of tumor, blood, muscle, liver, kidney, lung and spleen were measured by a well-type scintillation counter, and retention value in every tissue including tumor was calculated (in per cent of administered dose per g-tissue weight) .
    The binding capacity of these mercuric compounds to protein is strong, and retention value of these compounds in the tumor was nearly in proportion to the binding capacity to protein.
    The decrease of retention values as time elapsed was the slowest in tumor tissue among principal organs, except the kidney.
    It is important for the purpose of clinical scanning that the ratio of the concentration of radioactivity in tumor to tissue is large. Especially concerning the concentration ratio between tumor and muscle, 203Hg-chlormerodrin, which had the weakest binding capacity to protein in comparison with other mercuric compounds investigated, showed the highest value; that is, 203Hg-chlormerodrin should be most useful for tumor detection.
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  • Masao KANEKO, Michiko WATANABE, Tadao ABE, Chihoko MURATA, Kuniteru SA ...
    1970 Volume 19 Issue 12 Pages 597-601
    Published: December 15, 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
    99mTc-O4 was eluted by saline from Ultra-technecow. 99mTc-sulfur colloid was prepared in sterilized condition and injected intravenously in 194 cases, includng 18 primary liver cancer, 67 metastatie liver cancer, 18 liver cirrhosis, 33 suspected liver cirrhosis, 16 hepatitis, 2 liver abscess, 4 obstructive jaundice, one of each liver cyst, reticulosis, chronic leukemia, reticulosarcoma and hemangiosarcoma of the spleen and 31 normal cases. The scintiphotos were taken by Nuclear Chicago's scinti-camera, PHO/GAMMA III, in the projections of posterioanterior, right anterior oblique, left anterior oblique in patient's supine, both lateral and anterio-posterior in prone position. In most o f cases given 3 to 5 milli-curie of 99mTc-suflur colloid, the scintiphotos could be taken within 30 second. In less than 3 millieurie, the time for scintiphotography was 30-180 sec. Even more than 5 milli-curie of 99mTc-sulfur colloid, it takes about to sec. and not less than that. In most of the patients, it was possible to hold breathing for 30 sec. Therefore, 3-5 milli-curie was considered sufficient for the breath-holding liver scintiphotography. Compared with radio-gold liver scintiphotography, the contour and size of liver was more sharp and close to the real size in the breath-holding liver scintiphotography using 99mTc-sulfur colloid, because of the limited movement of liver during scintiphotography. Shortness of time for scintiphotography makes it possible to take multi-directional scintiphotography and that gives even better information for the diagnosis of liver disease.
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  • Koji KAWASHIMA, Keiji UMEDA, Tomotaro SATO
    1970 Volume 19 Issue 12 Pages 602-604
    Published: December 15, 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
  • Mituhisa TAMURA, Shigenobu TAIRA
    1970 Volume 19 Issue 12 Pages 605-608
    Published: December 15, 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Atsushi MIZUIKE, Tomio KONO
    1970 Volume 19 Issue 12 Pages 609-613
    Published: December 15, 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • Shigefumi OKADA
    1970 Volume 19 Issue 12 Pages 614-621
    Published: December 15, 1970
    Released: July 21, 2010
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  • Yasutaka SAKURAI
    1970 Volume 19 Issue 12 Pages 622-630
    Published: December 15, 1970
    Released: July 21, 2010
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  • Yoshiyuki SHIRAISHI
    1970 Volume 19 Issue 12 Pages 630-639
    Published: December 15, 1970
    Released: July 21, 2010
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  • 1970 Volume 19 Issue 12 Pages 639a
    Published: 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • 1970 Volume 19 Issue 12 Pages 639b
    Published: 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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  • 1970 Volume 19 Issue 12 Pages e1
    Published: 1970
    Released: July 21, 2010
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  • 1970 Volume 19 Issue 12 Pages A1107-A660
    Published: December 15, 1970
    Released: July 21, 2010
    JOURNALS FREE ACCESS
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