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Volume 71, Issue 11
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[in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages i-
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (409K) -
Katsumi SHIBATAArticle type: Article
1997 Volume 71 Issue 11 Pages 519-529
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSNiacin is biosynthesized from tryptophan and its ability is enough to sustain the demand of niacin animal or human body. Therefore, niacin itself does not need to take. Vitamin B groups and minerals are required in the conversion of niacin from tryptophan. Thus, we investigated the effects of feeding with a thiamin-free, riboflavin-free, pyridoxine-free, or mineral-deficient diet on the conversion ratio of tryptophan to niacin in rats. In the thiamin-free experiment, the ratio was higher in the thiamin-free group than in the control. In riboflavin-deficient rats, the conversion ratio was not affected. In the pyridoxine-free experiment, the ratio was lower in the pyridoxine-free group than in the control. In the mineral-deficient experiment, the sum of the urinary excretion of nicotinamide and its metabolites was lower in a deficient group than in the control. Accordingly, deficiencies of pyridoxine and/or minerals directly caused niacin deficiency, but thiamin- and riboflavin-deficiencies did not.View full abstractDownload PDF (791K) -
Shuji YAGI, Kaoru MOTOE, Kenichi KAWASAKI, Mitsuru FUNAHASHI, Kiyoko H ...Article type: Article
1997 Volume 71 Issue 11 Pages 531-536
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSWhen unsaponifiable mixture of the liver lipid of firefly squid Watasenia scintillans was analyzed by high performance liquid chromatography (HPLC), a large quantity of retinol (A-OH), presumed to be 11-cis A-OH, was detected. Several methods of isolation and purification were studied to identify the isomeric form. As the first step, a cholesterol was removed from a n-hexane solution of the mixture by keeping it at -20℃. The solution was fractionated by gel permeation chromatography on a column of Bio-Beads S-X3 with a mixed solvent of cyclohexane/dichloromethane (1:1). The object was isolated from the A-OH fraction by preparative HPLC on a silica gel column, using a mobile phase of n-hexane/1-octanol/2-propanol (98. 74 : 1.2 : 0.06) and purified on a reversed phase mini-column with 70% methanol in water, finally eluted from it with methanol. At these processes it should be noted that the oxidation from A-OH to retinal (A-CHO) occurs more easily than its cis-trans isomerization. The purified matter was identified as 11-cis A-OH by comparison of its UV, fluorescence and ^1H-NMR spectra with those of an authentic sample which was given from a photo-isomerization mixture of A-CHO. A-OH existed almost (in a 93% content of the total amount of A-OH) as the 11-cis form in the liver of firefly squid, and the presence was common between Decapoda and Octopoda.View full abstractDownload PDF (508K) -
Ayumi MURAKAMI, Mikako KISHIMOTO, Makiko KAWAGUCHI, Toshiki MATSUURA, ...Article type: Article
1997 Volume 71 Issue 11 Pages 537-543
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSVitamin E (α-tocopherol) content in organs of female rats fed excessive iron-preparation was investigated. An enzyme-treated heme iron preparation (HIP) and ferric citrate (FC) were uses as sources of iron. Twenty-four rats, 5 weeks-old, were divied into four groups : FC-normal group, FC-overload group, HIP-normal group (3.5 mg Fe/100 g food) and HIP-overload group (350.0 mg Fe/100 g food). The rats fed the experimental diets for 15 days ad libitum. The E contents of overload groups in organ were significantly lower than the E contents of normal groups, respectively. The E contents of HIP groups were significantly low in liver, heart and lung, and tendentiously low in kidney compared with the E contents of FC groups, respectively, Excessive HIP enhanced strongly the reduction in E content of organs. The cause isn't clear, but it is considered that the difference of iron poverty in organs between HIP and FC may cause the difference of E content in organs.View full abstractDownload PDF (603K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...Article type: Article
1997 Volume 71 Issue 11 Pages 545-546
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
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[in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 546-
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (185K) -
[in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 546-547
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (306K) -
[in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 547-549
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (394K) -
[in Japanese], [in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 549-
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (141K) -
[in Japanese], [in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 551-552
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
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[in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 552-554
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (394K) -
[in Japanese]Article type: Article
1997 Volume 71 Issue 11 Pages 554-555
Published: November 25, 1997
Released on J-STAGE: April 07, 2018
JOURNAL FREE ACCESSDownload PDF (214K)
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