RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Volume 59 , Issue 9
Showing 1-4 articles out of 4 articles from the selected issue
Articles
  • Tamotsu KITA, Hiroko TOMITA, Chiharu SAKAGUCHI, Fuzuki YANO, Eisuke SH ...
    2010 Volume 59 Issue 9 Pages 541-547
    Published: 2010
    Released: September 29, 2010
    JOURNALS OPEN ACCESS
    Diagnosis of adrenal adenomas for patients with primary aldosteronism is sometimes difficult only by referring to the visualization pattern in adrenocortical scintigraphy without regards to standard scintigraphy or suppression scintigraphy with dexamethasone. We studied if quantitative evaluation of the standard scintigraphy without dexamethasone suppression can be useful to diagnose aldosteronomas. Twenty-nine patients who had undergone adrenalectomy with different clinical manifestations (16 patients with primary aldosteronism, 6 patients with Cushing's syndrome and 7 patients without hormonal abnormality) were included in the study. Volume of the adrenocortical adenomas, 131I nor-cholesterol uptake of the adrenocortical adenomas, and 131I nor-cholesterol uptake per unit volume of the adrenocortical adenomas were compared between the 3 groups. The volume of adrenocortical adenomas in the patients with primary aldosteronism was significantly lower than those in the other two groups (Cushing's syndrome p<0.01, Non-hormonal abnormality p<0.01). No significant differences were found between the 3 groups in terms of 131I nor-cholesterol uptake of adrenocortical adenoma. The 131I nor-cholesterol uptake per unit volume of adrenocortical adenomas was significantly higher in the patients with primary aldosteronism than those in the other two groups (Cushing's syndrome p<0.001, Non-hormonal abnormality p<0.001). 131I nor-cholesterol uptake per unit volume of adenoma obtained from adrenocortical scintigraphy without dexamethasone suppression can be useful in the diagnosis of aldosteronoma.
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  • Yudan WANG, Yusuke KOTO, Nobuo SAKAMOTO, Naoki KANO, Hiroshi IMAIZUMI
    2010 Volume 59 Issue 9 Pages 549-558
    Published: 2010
    Released: September 29, 2010
    JOURNALS OPEN ACCESS
    In order to evaluate the efficiency of shell biomass as sorbent for rare earth elements (REEs), thorium (Th) and uranium (U), sorption experiment from multi-element solutions containing known amount of REEs, Th and U using Buccinum tenuissimum shell was explored. Furthermore, to confirm the characteristics of the shell biomass, the surface morphology, the crystal structure, and the specific surface area of the shell (both original sample and the heat-treatment (480°C, 6h) sample) was determined.
    Consequently, the following matters have been mainly clarified. (1)By heat-treatment (480°C, 6h), the crystal structure of the shell biomass was transformed from aragonite (CaCO3) into calcite (CaCO3) phase, and the specific surface area of the biomass have decreased remarkably (i.e., by a factor of less than one eighth). (2)The shell biomass (both original sample and the heat-treated sample) showed excellent sorption capacity for REEs, although the sorption capacity decreases slightly after heat-treatment. (3)Adsorption isotherms using the shell biomass can be described by Langmuir and Freundlich isotherms satisfactorily for REEs, but not for Th and U in this work. (4)Shell biomass (usually treated as waste material) could be an efficient sorbent for REEs in future.
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Materials(Data)
Serial Lecture
Fundamentals and Applications of Neutron Diffraction(Applications 23)
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