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Volume 24, Issue 9
Displaying 1-13 of 13 articles from this issue
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—Separation of Rare Earth from Tantalum—Wataru ISHIBASHI, Shinichi SAITO, Tooru HIRAYAMA1975Volume 24Issue 9 Pages 601-608
Published: September 15, 1975
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSIt is necessary to separate rare earth from tantalum by the rapid methods in order to remove effects of a strong radioactivity and a short half-life. Tantalum is extracted with 10% N-lauryl (trialkylmethyl) amino-benzene pre-equilibrated with a solution of 9M hydrochloric and 0.15M hydrofluoric acid. Non-radioactive rare earth element is added to this aqueous solution, a precipitation of trace amounts of radioactive rare earth in aqueous solution is formed by the addition of rare earth. Some factors for the determination,
1) the effect of an irradiation position of sample in atomic reactor,
2) the effect on the extraction with 10%N-lauryl (trialkylmethyl) amino-benzene for radioactive rare earth,
3) the effect of the concentration of hydrofluoric acid, ammonia water and nitric acid in co-precipitation.
As a result of investigation of data, we obtained satisfactory results.
1) Rare earth can be considered that there is no effect in case of the extraction of tantalum with 10%N-lauryl (trialkylmethyl) amino-benzene.
2) The recovery of rare earth by co-precipitation increases under the condition in which an ammonium ion coexists, and when the concentration of hydrofluoric acid decreases, but a decreasing tendency is seen by the increase of nitric acid concentration.
3) The time required for the extraction is 9 hours. In case of determination for dysprosium tantalum is extracted with 10%N lauryl (trialkylmethyl) amino-benzene before activation and the time for separation is 2 hours.View full abstractDownload PDF (883K) -
Shigeo BABA, Michitake KUROKI, Kenji SUZUKI, Yasuji KASUYA1975Volume 24Issue 9 Pages 609-613
Published: September 15, 1975
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSN-Benzoyl-N'-phenyl-2, 6-diaminobenzoie acid (F-1) is a new anti-inflammatory agent. Isotopically labeled two compounds of F-1 (3H-F-1 and14C-F-1) were synthesized and their absorption and distribution were investigated in rats and guinea pigs.
When3H-F-1 was orally administered to rats and guinea pigs, about 20% of the administered radioactivity was excreted in the urine and approximately 70% of it was excreted in the feces during 7 days after3H-F-1 administration. A higher concentration of3H-F-1 in the blood was observed in rats than in guinea pigs. The maximum blood concentration of3H-activity appeared one hour after the oral administration of3H-F-1 to rats, while in guinea pigs it appeared three hours later.
These facts are in good agreement with the difference in the anti-inflammatory effect between rats and guinea pigs. The highest concentration of3H-activity in various organs, such as liver, adrenal, kidney, and lung, was found three hours after the oral administration of3H-F-1.View full abstractDownload PDF (2786K) -
Shigeo BABA, Michitake KUROKI, Kenji SUZUKI, Yasuji KASUYA1975Volume 24Issue 9 Pages 614-618
Published: September 15, 1975
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe metabolism of N-benzoyl-N'-phenyl-2, 6-diamintbenzoic acid (F-1) was studied by a radiotracer technique.
When14C-F-1 was administered to rats and guinea pigs, benzoic acid, p-hydroxybenzoic acid, and the glycine conjugates of these compounds were found in the urine as its metabolites. In the case of3H-F-1 administration, it was possible to detect N-acetyl-N'-phenyl-2, 6-diaminobenzoic acid in the urine as a major metabolite. Rats and guinea pigs excreted a majority of radioactivity as unchanged F-1 into feces.
The uptake of3H-activity into CMC pouch was considerably high 12 hours after the oral administration of3H-F-1 to inflamed rats. A large amount of unchanged F-1 rather than N acetyl-N'-phenyl-2, 6-diaminobenzoic acid (metabolite 1) was found in the CMC pouch. On the other hand, in the liver the amount of metabolite 1 was larger than the unchanged parent compound F-1.
These facts were taken into account in an attempt to give some consideration in the mode of action of anti-inflammatory effect of F-1.View full abstractDownload PDF (582K) -
Shoji YOSHIDA, Michio KONO, Machiko KUMANO, Akira MATSUMOTO, Yoshiki T ...1975Volume 24Issue 9 Pages 619-625
Published: September 15, 1975
Released on J-STAGE: December 13, 2010
JOURNAL FREE ACCESSThe purpose of this study is to evaluate regional perfusion and ventilation in central bronchogenic carcinoma using133Xe serial scintigraphy. Scintigraphie findings were compared with those of bronchography and pulmo-angiography. We discussed the mechanism of the characteristic133Xe-trapping phenomenon in central bronchogenie carcinoma.133Xe-trapping was seen in 24 cases of 32 patients with central bronchogenie car-cinoma (75%) . In 8 cases, while133Xe-trapping was not seen in the scinti photos of the lung, ventilatory dead space was observed, which would indicate a combined lesion of bronchial obstruction and arterial interruption. In 14 of the 24 cases, the133Xe-trapped lung area was located in the main lesion and in 10 of them in the adjacent lesion. Thus, a decreased perfusion and/or a bronchial stenosis were observed in all the 133Xe-trapping cases.
The finding of133Xe serial scintigraphy in a case of early central bronchogenic carcinoma indicated that133Xe-trapping phenomenon could not be obtained in the area of irreversible obstructive pneumonia accompanying with bronchogenic carcinoma. It is assumed that in case of secondary pulmonary changes such as local emphysema and reversible pneumonia, the trapping phenomenon could be seen. As a screening method of central bronchogenic carcinoma, this examination is very significant because of its simple technique and its low radiation doses. It also allowed a quantitative control of radiation therapy.View full abstractDownload PDF (8121K) -
Masayoshi AKISADA, Tatsuya MIYAMAE1975Volume 24Issue 9 Pages 626-632
Published: September 15, 1975
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSFrom March 1974 to May 1974, liver scintigraphies were performed in Mitsui Memorial Hospital. Three groups of patients were composed of 24 of liver cirrhosis, 29 of chronic hepatitis and 30 of normal control group. The mixture of 1.5 mCi of99mTc-phytate and 30μCi of198Au-colloid were injected rapidly.
1) KLvalue of99mTc-phytate in liver cirrhosis group was smaller than normal group and between them, chronic hepatitis group existed.
2) The correlation between T1/2 (L) and T1/2 (P) : In normal group, the coefficient correlation between T1/2 (L) and T1/2 (P) was fairly good both in99mTc-phytate and in198Au-colloid, whereas the correlation was low in chronic hepatitis group and liver cirrhosis group.
3) The correlation of KLvalue between99mTc-phytate and198Au-colloid: The correlation of KLvalue were low in all three groups: however, KLvalues in99mTc-phytate were higher than in198Au-colloid in all three groups.
4) When each probe was placed on the temporal and thigh region simultaneously for obtaining the peripheral blood clearance, T1/2 (P) value (temporal) was always smaller than T1/2 (P) value (thigh) .
5) Grade of kidney visualization in liver scintigraphy using99mTc-phytate: Kidney activities were seen in 72.9% of 83 patients and there was no grade difference between normal, chronic hepatitis and liver cirrhosis group.
6) An additional attempt to determine the nature and size of“99mTc-phytate in vivo colloid”, Ca ion was added to99mTc-phytate solution prior to the injection. Lung, spleen, and liver were simultaneously visualized using this“in vitro99mTc-phytate minicolloid”.View full abstractDownload PDF (4704K) -
—On the Scintigram of the Diseases of the Knee Joint—Yoshimi ONO, Otomasa ITO, Koichi ASAKURA, Masatoshi SUGAHARA, Ikumitu ...1975Volume 24Issue 9 Pages 633-638
Published: September 15, 1975
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSTechnetium-99m-pyrophosphate (99mTc-PP) has come to be used routinely as a bone imaging agent. Although it has not been proved clearly that99mTc-PP parallels calcium in bone metabolism.99mTc-PP was compared with the predecessors, 85Sr and87mSr, in terms of bone uptake by scintimetry method on the diseases of the knee joint, the scan of which had relatively little background. Patients with osteonecrosis, osteoarthritis, rheumatoid arthritis, osteochondritis dissecans, meniscus injury, articular fracture, Charcots joint and bone tumor were studied in this series.
Though the location of99mTc-PP was similar to that of85Sr, the localized quantities were different each other. This difference was considered to be due to the difference of energy between those two nuclides and also to be due to capacity of the collimator.
In clinical use99mTc-PP was considered to play the role equivalent to85Sr. Then, the characteristics in the scintigrams various agent were presented in this paper.View full abstractDownload PDF (7001K) -
Tatsuya MIYAMAE, Koutaro FUKUI, Atsuo NAGATA, Morio SEKI1975Volume 24Issue 9 Pages 639-642
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
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Akira ISHIBASHI, Katsumi ISHII, Kazushige YODA, Shozo HASHIMOTO1975Volume 24Issue 9 Pages 643-646
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
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Keiji YANO1975Volume 24Issue 9 Pages 647-661
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
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Part 1. Accumulated numbers of teletherapy units installed in hospitals and their tendencyHiroshi YASUKOCHI1975Volume 24Issue 9 Pages 662-663
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
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Part II. Distribution of hospitals which installed teletherapy unit (s) and of registered radiologistsHiroshi YASUKOCHI1975Volume 24Issue 9 Pages 664-667
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
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Measurement of Low-level Sample—Lowback-ground Counter and Sample PreparationTetsuo IWAKURA, Yosihiko KASIDA1975Volume 24Issue 9 Pages 668-678
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
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1975Volume 24Issue 9 Pages A1563-A1116
Published: September 15, 1975
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (3692K)
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