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Volume 60, Issue 1
Displaying 1-12 of 12 articles from this issue
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Article type: Appendix
1986 Volume 60 Issue 1 Pages App7-
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (48K) -
Reiji YOSHIKAWA, Tomio ICHIKAWAArticle type: Article
1986 Volume 60 Issue 1 Pages 1-8
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSComparative determination of thiamine content in raw tuna meat, raw mackerel meat and their canned products was made by the thiochrome method with BrCN or K_3Fe(CN)_6-oxidation. Since the latter procedure gave much higher values, the causes were investigated. In the canned products, K_3Fe(CN)_6 oxidation produced fluorescent substances other thiochrome substances which were removed by L-Cysteine or by exraction with benzene・n-BtOH (75:25) as thiochrome extracting agent. The difference of thiamine contents in tuna and mackerel by two procedures was due to the presence of hydroxyethylthiamine (HET), which was in the order of 0.05-0.20mg HET-HCl eq./100g.View full abstractDownload PDF (724K) -
Tadayoshi ONOArticle type: Article
1986 Volume 60 Issue 1 Pages 9-14
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSMethods for separation and determination of provitamin A, were investigated by thin-layer chromatography (TLC) using calcium hydroxide as an adsorbent. 1) The solvent systems for fractionation of carotenoids were n-hexane or n-propanol/n-hexane (5:95). Development with n-hexane was most suitable for distinct separation of α-, β- and ζ-carotenes. When the TLC was developed first with n-hexane, the carotenes were separated from xanthophylls. Then, further development with n-propanol/n-hexane (5:95), separated β-cryptoxanthin from other xanthophylls. 2) Determination after elution: After the chromatogrphy, the fractions on the TLC plate were quantitatively scraped out and eluted with ethanol/n-hexane (1:10). After removal of the solvent under reduced pressure, various compounds dissolved in n-hexane were assayed in a spectrophotometer. Recoveries of α-carotene, β-carotene and β-cryptoxanthin were more than 90%. It was suggested that the method is suitable for quantitative analysis of provitamin A. 3) TLC-densitometry: Quantitative analysis of α- and β-carotenes by TLC-densitometry was also studied. The calibration curves and recovery tests were determinative, and it would be applicable to the practical use.View full abstractDownload PDF (559K) -
Tadaomi TAKENAWAArticle type: Article
1986 Volume 60 Issue 1 Pages 15-19
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
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[in Japanese], [in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 21-22
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (308K) -
[in Japanese], [in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 22-
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (185K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 22-23
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
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[in Japanese], [in Japanese], [in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 23-
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
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[in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 23-24
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (192K) -
[in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 25-26
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (287K) -
[in Japanese], [in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 26-
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (167K) -
[in Japanese]Article type: Article
1986 Volume 60 Issue 1 Pages 27-30
Published: January 25, 1986
Released on J-STAGE: March 14, 2018
JOURNAL FREE ACCESSDownload PDF (290K)
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