VITAMINS

Online ISSN : 2424-080X
Print ISSN : 0006-386X

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Volume 65, Issue 10

Displaying 1-22 of 22 articles from this issue

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Microbioassay of Vitamin B_<12> and Biotin in Seawater Using Lactic Acid Bacteria

Takashi UJIIE, Masayo DOI, Mitsuaki MORI, Hiroyuki SUDA

Article type: Article
1991 Volume 65 Issue 10 Pages 475-480
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_475

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Rapid methods for the microbiological assay of dissolved (free) vitamin B_<12> and biotin in seawater have been developed by using Lactobacillus delbrueckii subsp. lactis ATCC 7830 and Lactobacillus plantarum ATCC 8014 as assay organisms, respectively. Desalting and concentration of B_<12> (or biotin) in seawater were achieved by using Sep-pak C_<18> (or Amberlite XAD-2 column). Recoveries of B_<12> and biotin from seawater were 92% and 89%, respectively. The level of biotin in seawater determined by the method using L. plantarum was compared with that determined by the current method using Achromobacter sp. yH-51.

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Preparation of the Reference Standards of Phylloqinone Oxide, Menaquinone-4 Oxide and Menadione for High-Performance Liquid Chromatography : Research Committee of Fat Soluble Vitamins, Subcommittee for the Preparation of Standard Assay Methods for K Vitamins in Biological Materials by High-Performance Liquid Chromatography

Goichiro KATSUI, Hideaki FUKAWA, Shizumasa KIJIMA, Akira MATSUMOTO, Ta ...

Article type: Article
1991 Volume 65 Issue 10 Pages 481-488
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_481

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A collaborative study by five institutes was carried out to prepare the reference standards of phylloquinone oxide, menaquinone-4 oxide and menadione for HPLC. These samples have never been available. Each samples as the reference standard was specially prepared for this investigation and these purities were examined by the test method such as UV spectrum, absorbance, refractive index or melting point, TLC and HPLC. The reproducibility of these samples among five institutes are acceptable values as the reference standards of phylloquinone oxide, menaquinone-4 oxide and menadione for HPLC.

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 489-490
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_489

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 491-498
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_491

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 499-504
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_499

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 505-510
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_505

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Isolation and Structure of a New Vitamin B_6 Conjugate in Rice Bran

[in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 511-512
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_511

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[title in Japanese]

Article type: Appendix
1991 Volume 65 Issue 10 Pages 513-515
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_513

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 517-
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_517_1

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 517-518
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_517_2

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 518-519
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_518

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 519-520
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_519

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 520-
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_520

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...

Article type: Article
1991 Volume 65 Issue 10 Pages 521-
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_521_1

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...

Article type: Article
1991 Volume 65 Issue 10 Pages 521-522
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_521_2

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 523-
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_523_1

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 523-524
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_523_2

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 525-
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_525

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 526-528
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_526

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[title in Japanese]

[in Japanese], [in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 528-529
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_528

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 529-530
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_529

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[title in Japanese]

[in Japanese]

Article type: Article
1991 Volume 65 Issue 10 Pages 531-
Published: October 25, 1991
Released on J-STAGE: March 17, 2018

DOIhttps://doi.org/10.20632/vso.65.10_531

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