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Volume 4, Issue 2
Displaying 1-7 of 7 articles from this issue
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Sei-ichi OKUI1963 Volume 4 Issue 2 Pages 71-77
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
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Yoichi KINOSHITA, Kensuke MURAOKA1963 Volume 4 Issue 2 Pages 78-85
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
JOURNAL FREE ACCESSThis article deals with toxicity of Polyvinyl chloride (PVC) films.
The extractabilities of metals contained as stabilizer in PVC films were measured by dipping in various solutions. On the other hand LD 50 values of the stabilizers used for PVC processing were determined by acute toxicity tests on animals. Basing upon the relation between the both data arranged by B.P.F. method, the safe limit of the PVC films stabilized by various stabilizer systems were calculated.
The extractabilities of metals in water. 6% hydrochloric acid, 50% ethanol, 3% lactic acid, soybean oil, 3% acetic acid and 3% sodium chloride solutions were as follows:
Ca-Zn complex< Pb-stearate< Cd-Ba complex< Dibutyl Sn dilaurate< Dibutyl Sn maleate
The safe limit of metals in the stabilizer systems were calculated as follows:
Cd-Ba complex: 4mg/mm2max.
Pb-stearate: 5mg/mm2max.
Dibutyl Sn dilaurate: 188mg/mm2max.
Dibutyl Sn maleate: 194mg/mm2max.
Ca-Zn complex: 500mg/mm2max.View full abstractDownload PDF (1480K) -
Mitsuhiko SAIGO, Kaoru OGURA, Hiroshi TSUNODA1963 Volume 4 Issue 2 Pages 85-92
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
JOURNAL FREE ACCESSIn 1950, H. Tsunoda (a member of the group the writer belongs to) published the conclusion that the damage source of yellowed rice was found to be a kind of mold nomenclated as Penicillium islandicum Sopp and also reported that the damaged rice artificially cultivated caused cirrhosis hepatitis to rats used as the test animal of per os administration. Since the report was published, the mold has been used as a tool of experiment on hepatitis widely in medical field.
In continueing the concerning studies, the writer has found the existence of several strain in the mold above described and also noticed that the qualitative and quantitative differences, or strength of toxicity of the pigments produced showed a possibility to be an index for their taxonomic relationships.
To make the attempt convincible, the description on the further study to have provedthe evidence that each strain was characteristically the origin of each specific type of hepatitis, is necessary. Because of space limitation, only the summarized conclusions are presented.
1) The pigment produced is to be an index for the taxonomic relationships of strain of Penicillium islandicum Sopp of which morphological classification having been found to be difficult.
2) The strains are classified under the three types: Flavoskyrin type, Islandicin type and Erythroskyrin type.
Classificational type Produced pigment
3) Examining the coloration of colony reverse, Flavoskyrin type gives orange colored fungus, Islandicin type, deep reddish orange, and Erythroskyrin type, black orange coloration.View full abstractDownload PDF (1556K) -
Mitsuru UCHIYAMA, Mikiko FUKUHARA1963 Volume 4 Issue 2 Pages 93-96
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
JOURNAL FREE ACCESS2, 2'-biquinoline was used for the determination of copper in foodstuffs. Analytical results were compared with those obtained by diethyldithiocarbamate method. Presented method was recognized to be more suitable than carbamate method for the following reason: negligible blank value, formation of stable color, less interference by other cations, possibility for determining cuprous and cupric ion separately.View full abstractDownload PDF (672K) -
Oil-Soluble DyesSeiji FUJII, Mieko KAMIKURA1963 Volume 4 Issue 2 Pages 96-100
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
JOURNAL FREE ACCESSThin layer chromatography with silica gel was applied to 15 oil-soluble dyes (Table 1) and 12 solvents (Table 2) have been studied as developer.
The results obtained were as follows:
1) Azobenzene, p-aminoazobenzene, Butter Yellow, p-methoxyazobenzene, p-hydroxyazobenzene, Sudan G could be separated by dichloroethane (1, 2).
2) Oil Yellow AB and Oil Yellow OB could be separated by xylene or pentachloroethane.
3) Sudan III, Sudan IV and Oil Red OS could be separated by dichloroethane, chloroform or trichloroethane (1, 1, 2) respectively.
4) Quinoline Yellow SS could be separated from above-mentioned dyes by chloroform.View full abstractDownload PDF (633K) -
Masahiko FUJITA1963 Volume 4 Issue 2 Pages 103-110
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
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Vitamin C Additive in MilkOtoharu ISHIZAKA, Hideko ISHIHARA, Tsutomu HONDA1963 Volume 4 Issue 2 Pages 111-114
Published: April 30, 1963
Released on J-STAGE: November 22, 2010
JOURNAL FREE ACCESSDownload PDF (533K)
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