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Volume 28, Issue 10
Displaying 1-13 of 13 articles from this issue
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—Specific Characteristics of a Long Path Internal Gas Flow Proportional Counter—Tomoo SAITO, Kazuo WATANABE, Naotake MORIKAWA1979Volume 28Issue 10 Pages 603-608
Published: October 15, 1979
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSA long path internal gas flow proportional counter was devised to be used as a high sensitivity detector for radio gas chromatography, and its performance characteristics were investigated. The long path counter tube used for this detector has a sufficiently long passage in comparison with the diameter. The counter tube for general use is made of brass or copper tube 1 cm in diameter, 100 cm in length with a mirror finish on all internal surface, and the center electrode is of tungsten wire 0.05 mm in diameter. For actual use, several of these counter tubes are connected in series in assembly to hold the total volume of a gas sample in the counting system over a desired counting period. Thus this flow detector as an integral type one and gives directly a counting rate. Experiments showed that the dynamic counting efficiencies of tritium and carbon-14 were about 90% and equal to the static counting efficien-cies. Furthermore, with this detector, the counting rate does not appear to be affected by minor variations of the effective inner volume of the counter tube and the flow rate of counting gas.View full abstractDownload PDF (740K) -
Shigeaki MATSUMOTO, Hisanobu KOBAYASHI1979Volume 28Issue 10 Pages 609-612
Published: October 15, 1979
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSIt is necessary to distinguish between the dew point and the frost point below 0°C. The freezing of the dew and the melting of the frost are respectively detected by the rapid decrease and the increase of the conduction current on the narrow surface of insulated layer made of epoxy, 0.5 mm in width and 10 mm in length, on which the dew deposits. The dew point -9°C and the frost point -8°C in the humidity 21% at the temperature 13°C are clearly distinguished in this method.View full abstractDownload PDF (427K) -
Hideki HARA, Naoichi OHTA, Minoru TERAI, Kenji TOMURA1979Volume 28Issue 10 Pages 613-617
Published: October 15, 1979
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSA combined chemical method was studied for the preparation of high specific activity manganese-54 by pile-neutron irradiation. The commercial pure iron was purified prior to neutron irradiation and manganese-54 was separated from irradiated iron with successive cation and anion exchange techniques as follows.
The commercial pure iron was dissolved in hydrochloric acid, and ferric hydroxide was precipitated by the addition of ammonia. The ferric hydroxide precipitate was centrifuged and dissolved in a certain amount of hydrofluoric acid. The precipitation of ferric hydroxide from the hydrofluoric acid solution was repeated until no more chloride ion was detected in the supernatant solution. Several trace metals contained in the commercial pure iron, e.g., cobalt and copper, were eliminated by this procedure as the stable ammine complexes. The final hydroxide precipitate obtained by the reprecipitation was dissolved in IN hydrofluoric acid, and manganese was adsorbed by the cation exchange resin Dowex 50×8. The collected effluent from the cation exchange resin column was evaporated on the water bath to incipient dryness. About 12g of FeF3⋅3H2O was obtained from 5g of the original iron used. About 12g of iron fluoride crystals wrapped with cadmium sheet was irradiated in the TRIGA Mark II Reactor of Rikkyo University (fast neutron flux: 6.5×1010n⋅cm-2⋅sec-1) for 18 hours. After 4 days cooling, the irradiated iron fluoride was dissolved in 1N hydrofluoric acid. Manganese-54 produced by (n, p) reaction from iron-54 and small amount of iron in hydrofluoric acid solution were adsorbed by the cation exchange resin Dowex 50×8. On the other hand, the bulk of iron was separated in the effluent together with arsenic and antimony. Metal ions adsorbed by the cation exchange resin were stripped by 8N hydrochloric acid. Iron in 8N hydrochloric acid solution was adsorbed by the anion exchange resin IRA-400, and manganese-54 was obtained in the effluent as the hydrochloric acid solution. Absolute amount of manganese-54 obtained from 5g of the original iron used was about 0.43μCi.View full abstractDownload PDF (511K) -
Hiroshi SHIBATA, Masanori SOGOU, Atsushi OZAKI, Jinzo OBARA1979Volume 28Issue 10 Pages 618-623
Published: October 15, 1979
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSIn order to clarify the suitability of 198Au-colloid and Na251CrO4 as a marker of transit of the gastrointestinal content of the chicken, the distribution, absorption and excretion of 198Au-colloid and Na251CrO4 in the chicken were examined.
Orally administered 198Au-colloid was not absorbed by the gastrointestinal tract and excreted into feces. Intravenously injected 198Au-colloid was not excreted into the gastrointestinal tract through the gastrointestinal wall. On the other hand, orally administered Na251CrO4 was relatively well absorbed by the gastrointestinal tract and distributed over a whole body. Intravenously injected Na251CrO4 was excreted into the gastrointestinal tract through the gastrointestinal wall and bile ducts. It seemed that 198Au-colloid was not adhered to the gastrointestinal mucosa and consequently, the transport of 198Au-colloid in the gastrointestinal tract was not delayed.
It is concluded that 198Au-colloid is highly suitable as a marker of gastrointestinal tranist of the chicken but Na251CrO4 is unsuitable.View full abstractDownload PDF (613K) -
Hiroyuki WAKAMATSU, Yoshikazu WAKAMATSU, Minoru KIDO, Takehito TAKADA, ...1979Volume 28Issue 10 Pages 624-629
Published: October 15, 1979
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSDiagnostic system is described that obtains a set of serial gated images (SGI) covering the entire cardiac cycles and left ventricular (LV) volume curve (VC) with high temporal resolution (10msec) . The system consists of two functional parts. The one, which is based upon an inexpensive modification of multiformat imaging device, yields SGI. The other, which is based on a minicomputer system, acquires data only from around about LV area and yields LVVC from EGG P wave without the reconstruction of these images. In as little as 5 min result, which is also corrected uniformity of γ-camera, is given.View full abstractDownload PDF (3859K) -
—With Special Reference to the CG/SLCG Ratio—Yoshihiko OSHIUMI, Shunichi KOGA, Itsuma KAMOI, Hiromu NISHITANI, Yuui ...1979Volume 28Issue 10 Pages 630-635
Published: October 15, 1979
Released on J-STAGE: September 07, 2010
JOURNAL FREE ACCESSBoth serum cholylglycine (CG) and sulfolithocholylglycine (SLCG) levels were radioim-munoassayed by PEG method in 209 samples (204 hepatobiliary diseases, 5 normal controls) .
1) The results revealed that serum bile acid levels were excellent indicators for hepatic dysfunction in comparison with the conventional liver function tests.
2) Means o f 19.4±9.3μg/dl for CG and 21.7±6. 7μg/dl for SLCG were obtained in controls. Most hepatobiliary diseases demonstrated abnormally high bile acid levels, with extremely high CG values in conditions with bile stasis.
3) To differentiate various hepatobiliary diseases more clearly, the ratio of the primary and secondary bile acids (CG/SLCG ratio) was introduced (1.0±0.6 for controls) . In cases of bile stasis, CG/SLCG ratios ranged from 7.8±4.8 for intrahepatie cholestasis to 34.8± 27.6 for congenital biliary atresia, while other hepatic disorders demonstrated relatively low values. We conclude that the CG/SLCG ratio is a useful index for cholestasis. Diagnosis of the congenital biliary atresia could be possible.View full abstractDownload PDF (4823K) -
Hideo NARITA, Takashi MOROZUMI1979Volume 28Issue 10 Pages 636-638
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (339K) -
Junichi KOSEKI, Yoshiro NIITSU, Yoshiro GOTO, Ichiro URUSHIZAKI1979Volume 28Issue 10 Pages 639-641
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (295K) -
Shinobu KURA, Junko YOSHIDA, Haruma YOSHINAGA1979Volume 28Issue 10 Pages 642-644
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESS -
Katsumi IKEI, Hideo YAMAZAKI, Masahiro AKIMARU, Kayoko IKEDA, Shinjiro ...1979Volume 28Issue 10 Pages 645-647
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (1967K) -
Tatsuo IDO1979Volume 28Issue 10 Pages 648-657
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (1064K) -
7. Standard Sources for Environmental Radioactivity Measurement (1) Radioactive Standard Sources for γ-ray SpectrometryMasayasu NOGUCHI1979Volume 28Issue 10 Pages 658-667
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (1188K) -
1979Volume 28Issue 10 Pages A1963-A24
Published: October 15, 1979
Released on J-STAGE: July 21, 2010
JOURNAL FREE ACCESSDownload PDF (3890K)
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