VITAMINS
Online ISSN : 2424-080X
Print ISSN : 0006-386X
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Volume 53, Issue 5-6
Displaying 1-12 of 12 articles from this issue
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  • Transport of Thiamine by Microbes
    Takahiro NISHIMUNE
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 199-212
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_199
    JOURNAL FREE ACCESS
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  • Photodecomposition of Pyridoxine Accelerated by Flavine Mononuculeotide
    Nobuyasu MIZUNO, Fumiko NAKAYAMA, Emiko MRITA
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 213-219
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_213
    JOURNAL FREE ACCESS
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    Photodecomposition of pyridoxine (PN) in an aqueous solution was accelerated by the addition of FMN, whereas PN inhibited that of FMN. The accelerated photodecomposition of PN was apparently pseudo-first order, and was most rapid at pH 7.0, but became markedly slower especially with decreasing pH of the buffer solution. The decomposition could not be prevented even in a brown ampule without complete shielding with aluminium foil. Effect of some drugs further added to the reaction mixture was examined, and tyrosine and tryptophan were found to inhibit the decomposition. The photodecomposition of PN in infusion solutions, to which commercially available injections of PN and FMN were added, was studied. The decomposition was marked in sugar and saline infusion solution, although it was much less in amino acids infusion solutions. The results indicate that infusion solutions should be protected from light when they contain both PN and FMN.
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  • Folate Contents in Milk
    Masako YAMADA
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 221-227
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_221
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    Folate contents in samples obtained from cow's milk and breast milk were determined by a microbiological assay method with Lactobacillus casei ATCC 7469 as a test organism. For preparation of sample solution from each material, an improved technique by pretreatment with protease was employed throughout this study. Free and total folate contents in processed milk and breast milk estimated by the improved method amounted to 120〜190% of those obtained by ordinary method. After heating at 100℃ for 5 min, however, free folate activities in cow's milk decreased in some degree. Total folate content in farm milk was 115.1±28.1 μg/l, that of sterilized milk was 118.4±53.2 μg/l, and 115.8±45.3 μg/l in processed milk. These results strongly suggest that cow's milk, even though fresh or processed, have an almost the same folate level and a very wide range in the concentration of the vitamin. Total folate activity in breast milk was 71.8±26.1 μg/l, indicating that it has also a wide range of folate concentration. A favourable breast m,ilk with a high folate level was obtained from healthy women during lactation.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 229-
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_229_1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 229-230
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_229_2
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 230-231
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_230
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 231-232
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_231
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 232-
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_232_1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 232-233
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_232_2
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 235-236
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_235
    JOURNAL FREE ACCESS
    Download PDF (231K)
  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 236-
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_236
    JOURNAL FREE ACCESS
    Download PDF (174K)
  • [title in Japanese]
    [in Japanese]
    Article type: Article
    1979 Volume 53 Issue 5-6 Pages 237-238
    Published: June 25, 1979
    Released on J-STAGE: March 07, 2018
    DOIhttps://doi.org/10.20632/vso.53.5-6_237
    JOURNAL FREE ACCESS
    Download PDF (204K)
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