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Volume 79, Issue 8
Displaying 1-13 of 13 articles from this issue
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Haruhito TSUGEArticle type: Article
2005 Volume 79 Issue 8 Pages 383-389
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSRecent scientific topics on PQQ together with detouring history in its discovery, basic chemical properties, and distribution including analytical methods were reviewed. Nutritional function as to whether or not this compound is the vitamin for mammal was discussed relating to the paper recently published, in which PQQ dependent dehydrogenase might participate in the mammalian L-lysine catabolism. PQQ, which was discovered in 1979, identified as the redox cofactor for some microbial enzymes, is now deemed to be supplied from only limited microbes and supposed to be a kind of dispensable chemicals for animals. Since PQQ is one of very reactive redox compounds chemically, one might ingest this compound commonly together with other polyphenols found in plant-kingdom through human life. Critical point should be clarified first is whether or not this compound can be synthesized by green plants, because analytical data revealed that trace amount, but not negligible quantity, of PQQ was detected from vegetables and some animal products.View full abstractDownload PDF (768K) -
Hideko WADA, Tsutomu FUKUWATARI, Naoko KIMURA, Junko KITAMURA, Ryuzo S ...Article type: Article
2005 Volume 79 Issue 8 Pages 391-393
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSAlthough the conversion ratio of tryptophan-niacin has been reported to be 1/60 by the weight basis in human adults, there is no data on nursing infants of humans. It is estimated at 0 in 0-5 month-old nursing infants of humans and at 1/120 in 6-11 month-old of humans from extrapolating data obtained in the weaning rats and the adult rats. Then, in order to estimate the conversion ratio of tryptophan-niacin in nursing infants of humans, the rats from newborn to before weaning were used; the enzyme activities involved in the tryptophan-niacin metabolism were measured and compared with those of the adult rats. Consequently, tryptophan-2, 3-dioxygenase (TDO) activity which is the first enzyme in the tryptophan-niacin conversion pathway was very weak in the 1st day immediately after birth, and also in the 7th day. These results mean that niacin is hardly biosynthesized from tryptophan in the early stages of nursing infants in rats. Moreover, since the TDO activity on the 14th and 21st increased with age, when applying these data to humans, it was thought in the latter period of nursing infants of humans i.e., 6-11 month-old, that this conversion pathway begins to operate and it is about 1/120 which is the half of the human adults.View full abstractDownload PDF (389K) -
[in Japanese], [in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 395-398
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (485K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 399-401
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (492K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 401-403
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (333K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 405-406
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (257K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 406-
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (180K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 407-
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (206K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 408-
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (194K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 408-409
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (356K) -
[in Japanese]Article type: Article
2005 Volume 79 Issue 8 Pages 409-
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (218K) -
Article type: Bibliography
2005 Volume 79 Issue 8 Pages 411-413
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (302K) -
Article type: Bibliography
2005 Volume 79 Issue 8 Pages 415-419
Published: August 25, 2005
Released on J-STAGE: October 10, 2017
JOURNAL FREE ACCESSDownload PDF (536K)
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