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Volume 66, Issue 10
Displaying 1-16 of 16 articles from this issue
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Toshihiro SHIODA, Takashi KAWASAKIArticle type: Article
1992Volume 66Issue 10 Pages 569-580
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSCytosolic adenylate kinase (AK1; [EC 2.7.4.3]) synthesizes thiamin triphosphate (TTP) both in vitro and in vivo. AK 1 synthesizes TTP by a reaction: TDP + ADP ⇄ TTP + AMP in addition to its main reaction: 2ADP ⇄ ATP + AMP. No TTP-synthesizing enzymes other than AK 1 were detected in the skeletal muscle. TDP is assumed to bind to the less-specific nucleotide binding site (ATP binding site) of AK 1 as a substrate, while ADP binds to the highly-specific site (AMP binding site), which results in formation of TTP by phosphate transfer from ADP.View full abstractDownload PDF (1019K) -
Shuzi YAGI, Keiichi UNO, Shiro SAITO, Hiroyuki NODAArticle type: Article
1992Volume 66Issue 10 Pages 581-589
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSSince geometric isomers of retinol are not easily obtained, the individual determination of vitamin A groups in foods by high performance liquid chromatography has not yet been performed. In the present experiment, attempts were made to measure each isomer. The following procedure was found satisfactory for this determination. All-trans-retinal was transformed into a mixture of retinol cis-trans isomers by irradiation with visible light and reduction. The mixture was chromatographed on a silica gel column with authentic specimens (13-cis and all-tans forms). The concentration of each isomer was evaluated on the basis of the above results and the factors were confirmed in this work. Consequently, the mixture represents a retinol isomer standard. These factors were effective for isomer standardization by controlling the adsorptive activity of the silica gel, even when different columns are employed.View full abstractDownload PDF (828K) -
Katsumi SHIBATA, Michiko ONODERAArticle type: Article
1992Volume 66Issue 10 Pages 591-596
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSWe investigated the effects of 3-acetylpyridine, pyridine-3-aldehyde, pyridine-3-methanol, and β-picoline on the growth of rats, food intake, and the urinary excretion of nicotinamide, N^1-methylnicotinamide (MNA), N^1-methyl-2-pyridone-5-carboxamide (2-Py) and N^1-methyl-4-pyridone-3-carboxamide (4-Py). all the derivatives caused the significant increase in the urinary excretion of nicotinamide, MNA, 2-Py, and 4-Py. this result suggests that nicotinamide is biosynthesized via nicotinic acid-NAD pathway from the above derivatives. But, the administration of 3-acetylpyridine caused convulsion of the limbs as well as the much decrease in body weight and food intake. From these results, 3-acetylpyridine seemed likely to possess antagonistic action aganist niacin, rather than niacin activity, while, pyridine-3-aldehyde, pyridine-3-methanol, and β-picoline possessed niacin activity but not niacin antagonistic action.View full abstractDownload PDF (526K) -
Satoshi WATANABE, Saju KAWAUCHlArticle type: Article
1992Volume 66Issue 10 Pages 597-600
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSThiobarbituric acid-reactive substance (TBA-RS) was formed in the reaction of 2,4-hexadienal and t-butyl hydroperoxide (t-BuOOH) by heating at 95℃. The suitable amount of t-BuOOH was determined from the calibration curve of the TBA-RS formation in the reaction mixture. When riboflavin was added in this reaction mixture, TBA-RS formation was reduced proportionally with the amount of riboflavin. The riboflavin content in the reaction mixture measured by the fluorescence method was decreased with the addition of t-BuOOH. We considered that the inhibitory effect of riboflavin on the TBA-RS formation is due to the direct reaction with t-BuOOH and riboflavin degrades during the reaction.View full abstractDownload PDF (376K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 601-
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (151K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...Article type: Article
1992Volume 66Issue 10 Pages 601-602
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (286K) -
[in Japanese], [in Japanese], [in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 602-603
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (322K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...Article type: Article
1992Volume 66Issue 10 Pages 603-604
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
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[in Japanese], [in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 604-
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
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[in Japanese], [in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 604-605
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (324K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...Article type: Article
1992Volume 66Issue 10 Pages 605-606
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (235K) -
[in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 607-608
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (249K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 608-
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
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[in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 609-611
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (362K) -
[in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 611-613
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (527K) -
[in Japanese]Article type: Article
1992Volume 66Issue 10 Pages 613-
Published: October 25, 1992
Released on J-STAGE: March 17, 2018
JOURNAL FREE ACCESSDownload PDF (245K)
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