- 著者
- Yudzuru Inoue Tadakatsu Yoneyama Shinji Sugiyama Hideki Okada Yoshitaka Nagatomo
- 出版者
- Japan Association for Quaternary Research
- 雑誌
- The Quaternary Research (Daiyonki-Kenkyu) (ISSN:04182642)
- 巻号頁・発行日
- vol.40, no.4, pp.307-318, 2001-08-01 (Released:2009-08-21)
- 参考文献数
- 48
- 被引用文献数
- 9 13
ca.24.5ka以降に,南九州都城盆地の成層シラス台地上に発達した累積性黒ボク土断面の連続試料について,炭素・窒素安定同位体自然存在比(δ13C値,δ15N値)を測定し,その時系列変化を既報の植物珪酸体分析の結果などをもとに考察した.その結果,土壌のδ13C値から算出したC3およびC4植物起源炭素の比率と,植物珪酸体分析の結果から算出したC3およびC4植物の比率は,一部の試料を除いてC3植物>C4植物の傾向を示し,おおむね類似した.C3植物起源炭素の比率が優勢なアカホヤ(ca.6.5ka)上位のクロニガ(埋没腐植層:4A)および御池テフラ(ca.4.2ka)上位のクロニガ(埋没腐植層:2A)を含む第5~4層および第3~2層は,それぞれメダケ属(メダケ節・ネザサ節)と相関が高い(R2=0.917,0.806).そして,クロニガ(埋没腐植層)における土壌有機物の給源植物種は,C3植物のメダケ属が主体であると推定された.δ15N値は,一部を除いて既往研究により,乾燥した環境と推定される層準で高く(最高値10.0‰),湿潤な環境で低く(最低値2.9‰)なる傾向を示した.それは,激しい気候の変動(乾湿変動)や土壌条件によって変化する可能性を示唆する.
1 0 0 0 OA Structural Analysis of a Novel Oligosaccharide Isolated from Fermented Beverage of Plant Extracts
- 著者
- Akira Yamamori Yusuke Takata Eri Fukushi Jun Kawabata Hideki Okada Naoki Kawazoe Keiji Ueno Shuichi Onodera Norio Shiomi
- 出版者
- The Japanese Society of Applied Glycoscience
- 雑誌
- Journal of Applied Glycoscience (ISSN:13447882)
- 巻号頁・発行日
- vol.64, no.4, pp.123-127, 2017-11-20 (Released:2017-11-20)
- 参考文献数
- 23
- 被引用文献数
- 1
A fermented beverage of plant extracts (Super Ohtaka®) was prepared from about 50 kinds of fruits and vegetables. This natural fermentation was performed by yeast (Zygosaccharomyces spp. and Pichia spp.) and lactic acid bacteria (Leuconostoc spp.) and resulted in the production of a novel fructopyranose-containing saccharide, which was subsequently isolated using carbon-Celite column chromatography and preparative-HPLC. The structure of the saccharide was determined using MALDI-TOF MS and NMR, and the saccharide was identified as β-D-fructopyranosyl-(2→6)-β-D-fructofuranosyl-(2↔1)-α-D-glucopyranoside. This is the first description of this novel saccharide and its isolation from a natural source.
- 著者
- Akira Yamamori Yusuke Takata Eri Fukushi Jun Kawabata Hideki Okada Naoki Kawazoe Keiji Ueno Shuichi Onodera Norio Shiomi
- 出版者
- 日本応用糖質科学会
- 雑誌
- Journal of Applied Glycoscience (ISSN:13447882)
- 巻号頁・発行日
- pp.jag.JAG-2015_004, (Released:2015-04-03)
- 被引用文献数
- 3
Ten difructose anhydrides (DFAs) were the predominant products formed from the thermal treatment of equal amounts of D-glucose and D-fructose under melting conditions at 150°C for 60 min. The DFAs were isolated from the reaction mixture by carbon-Celite column chromatography and preparative high-performance liquid chromatography. The structures of the saccharides were confirmed by NMR measurements. We present the complete assignments of the 1H- and 13C-NMR signals of two of these DFAs for the first time.
- 著者
- Akira Yamamori Hideki Okada Naoki Kawazoe Kei Muramatsu Shuichi Onodera Norio Shiomi
- 出版者
- 日本応用糖質科学会
- 雑誌
- Journal of Applied Glycoscience (ISSN:13447882)
- 巻号頁・発行日
- vol.61, no.4, pp.99-104, 2014 (Released:2014-11-20)
- 参考文献数
- 30
- 被引用文献数
- 2 13
We have previously observed that the Super Ohtaka®, produced by fermenting extracts from 50 types of fruits and vegetables, contained the disaccharide, α-D-fructofuranosyl-(2→6)-D-glucose (α-Ff2→6G), which was produced during the fermentation process. α-Ff2→6G was also formed from equal amounts of D-glucose and D-fructose under melting conditions at 130°C for 45 min or at 140°C for 30 min. This disaccharide was isolated from the reaction mixture by carbon-Celite column chromatography and preparative- high performance liquid chromatography. It was confirmed to be α-Ff2→6G by matrix-assisted laser desorption ionization/time of flight mass spectrometry analysis and nuclear magnetic resonance measurements. The characteristics of α-Ff2→6G were investigated. The saccharide showed low digestibility and was 0.25 times as sweet as sucrose. Furthermore, unfavorable bacteria such as Enterobacter cloacae 1180, Escherichia coli 1099 and Clostridium perfringens 1211 that produce mutagenic substances did not break down the synthetic oligosaccharide.