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Volume 44, Issue 2
Displaying 1-14 of 14 articles from this issue
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Akito TSUMURA, Reiko OKAMOTO, Yuu-ichi TAKAKU, Shin-ichi YAMASAKI1995Volume 44Issue 2 Pages 85-92
Published: February 15, 1995
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSA direct method was developed for the determination of ultratrace U in rainwater by high resolution ICP-MS. Using the ultrasonic nebulizer sample introduction system, we were able to reach an ultimate detection limit of 0.06 pg/l for 235U based on three times the standard deviation of the blank fluctuation.
The proposed method has excellent sensitivity and it was possible to measure ultrat race levels of U and 235U to 238U ratio in all rainwater samples directly with acceptable speed (5 min/sample) and precision (RSD 5%) . The range of concentration of U in 23 rainwater samples collected at Tsukuba and Tokyo in 1992-1993 was 0.56 ng/l -14.2 ng/l with an arithmetic mean of 3.3 ng/l and a weighed mean of 1.7 ng/l.
The isotope ratios of 235U : 238U for the samples were in good agreement with the natural abundance of these nuclides.
It was found that the relation between the intensity of rainfall and uranium concentration shows a negative correlation significant at the 1 % level of significance (r=0.643**) . The data approximately follow a hyperbolic curve, with U concentration decreasing as the precipitation rate increases.View full abstractDownload PDF (913K) -
Fumihiko YAMAMOTO, Minoru MAEDA, Iwao TAKESHITA, Kouji MASUDA1995Volume 44Issue 2 Pages 93-98
Published: February 15, 1995
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSA comparative study in Wistar normal rats and ODS rats unable to synthesize ascorbic acid showed that the radioactivity distribution in tissues after i. v. injection of 6-deoxy-6- [18F] fluoro-L-ascorbic acid (18F-DFA) was not significantly influenced by the vitamin C status of the animal. Biodistribution studies in Wistar male rats implanted with RG-C6 glioma intracerebrally demonstrated that 18F-DFA had low tumor localization (0.17% dose/g at 30 min and 0.16% dose/g at 60 min) with very little specific distribution compared with non-target brain tissues. These results indicate that the use of 18F-DFA may not be a candidate for imaging brain tumor by PET.View full abstractDownload PDF (554K) -
Tadao TANAKA, Muneaki SENOO1995Volume 44Issue 2 Pages 99-102
Published: February 15, 1995
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSThe effects of molecular size of humic acid (HA) on the interaction affinity with 60Co and 241Am have been examined with respect to different molecular size fractions which were isolated from the Aldrich Chemical's HA into 5000-30000, 30000 -100000 and >100 000 in molecular weight (MW), while the functional groups of the molecular size fractions have been characterized with respect to their FTIR spectral characteristics.
The HA of >100000 MW which was dominated with aliphatic functional groups did not take part in the interaction with 60Co and 241Am. The HA of 30000-100000 MW was dominated with both aromatic COOH and phenolic OH, and it perferentially interacted with 60Co and 241Am. However, 241Am did not interact with the HA of 5000-30000 MW which was mainly dominated with aromatic COON, while 60Co interacted. Such effects of molecular size of HA may be caused by more than two different functional groups concerning to the complexation and/or steric hindrance around the functional groups.View full abstractDownload PDF (348K) -
Tomoko M. NAKANISHI, Shoji FUTATSUGAWA, Kouichiro SERA1995Volume 44Issue 2 Pages 103-107
Published: February 15, 1995
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSCaatinger (Mimosa acutistipula Benth), which has been a popular wood among the people in north east part of Brazil, was analyzed using PIXE (proton induced X-ray emission) . The wood sample was divided into three parts, center, inner and outer side of the wood. Using the wood slice of each part, Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Mn, Fe, Cu, Zn, As, Se, Br, Rb, Sr, Y, Ru and Pb were detected. When the wood slices were decomposed with nitric acid, Co and Ni were able to be determined. Two samples, non-destructive and chemically treated sample, of heartwood and sapwood showed the similar concentration of the elements. There was a discrete change of the accumulated elements between heartwood and sapwood. Most of the elements detected were tended to be concentrated at sapwood, whereas Ca, Cu and Sr were concentrated at heartwood. At center part, especially, Na, Mg, Fe and Sr were accumulated. Since most of the heartwood and sapwood is dead, discrete change of the element concentration suggests some element movement across the annual ring at heartwood formation.View full abstractDownload PDF (497K) -
Hiyoshimaru OYAMADA, Etsuji NOMURA, Yasuhiko YAMADA, Isao UCHIDA, Mits ...1995Volume 44Issue 2 Pages 108-111
Published: February 15, 1995
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSIn 1978, one of the authors (H. Oyamada) developed an apparatus which can remove 131I from the urine on the basis of the action of anion exchange resin (IRA 400) after high dose radioiodine treatment for metastatic thyroid cancer patients. This apparatus has been slightly modified by applying a cartridge filled with IRA 400. This newly modified apparatus was tested for its efficiency in removing 131I from the urine on 4 consecutive cases. The removal efficiency for an entire term of hospitalization of each patient ranged from 99.98% to 99.83%, indicating a very high efficiency.View full abstractDownload PDF (3352K) -
Hiroshi TOMINAGA1995Volume 44Issue 2 Pages 112-122
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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radioimmunotherapy, radiation synovectomy and bone painpalliationKunihiko YOKOYAMA, Seigo KINUYA, Norihisa TONAMI, Kinichi HISADA1995Volume 44Issue 2 Pages 123-134
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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1. Ion sourcesJunzo ISHIKAWA1995Volume 44Issue 2 Pages 135-150
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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Ryuichi TANAKA1995Volume 44Issue 2 Pages 140-144
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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Akira ISOYA1995Volume 44Issue 2 Pages 145-150
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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[in Japanese]1995Volume 44Issue 2 Pages 151-152
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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[in Japanese]1995Volume 44Issue 2 Pages 153-154
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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[in Japanese]1995Volume 44Issue 2 Pages 155-156
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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[in Japanese]1995Volume 44Issue 2 Pages 157-158
Published: February 15, 1995
Released on J-STAGE: July 21, 2010
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