著者

水上 恵美 小田 晃司 番場 孝 野中 潤 今井 明 古川 征治

出版者

一般社団法人日本医療薬学会

雑誌

医療薬学 (ISSN:1346342X)

巻号頁・発行日

vol.28, no.6, pp.559-563, 2002-12-10 (Released:2011-03-04)

参考文献数

22

被引用文献数

1

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The concomitant use of oral iron preparations and antacids causes iron to form macromolecular polymer thereby reducing its absorption as a result of a pH elevation in the stomach. We measured the Iron recovery after ultrafiltration to assess macromolecular polymer using sodium ferrous citrate (SFC) and ferrous sulfate (FS) preparations plus eight types of antacids Aluminum hydroxide (Al), Magnesium oxide (Mg), Calcium carbonate (Ca), and Sodium bicarbonate (NaHCO3) preparations and four combinations.The samples were mixed under two conditions : (1) a mixture of the maximum single oral dose of each iron preparation and an antacid dissolved in a hydrochloric acid solution adjusted to various pH levels (4, 5, 6, 7, 8, and 9) (2) pH not adjusted. Iron recovery rate was measured using the O-phenanthroline method after ultrafiltration (fractions with a molecular weight of 10, 000).As a result, we obtained the following results : (1) the iron recovery rate decreased according to elevation of pH. In addition, macromolecular polymer formation was pH dependent. The iron recovery rate of FS when mixed with all antacids except Mg was less than 60 % at a pH of 7. The iron recovery rate of SFC was not less than 60% at a pH of 7 with any antacid. (2) the iron recovery rate of FS when mixed with Ca, NaHCO3, the Al + Mg combination and Mg was less than 60%. The iron recovery rate of SFC was less than 60 % with only Mg.FS formed macromolecular polymer in the presence of Ca, NaHCO3, the Al+Mg combination and Mg. As a result, the iron absorption was suggested to decrease when FS was administered with these antacids. SFC showed little formation of macromolecular polymer in the presence of antacids, and it was therefore suggested that the absorption would only be slightly influenced by the concomitant use of SFC with antacids. Therefore, the formation of macromolecular polymers differed between the two oral iron preparations, FS and SFC, when mixed with antacids. These findings suggest that iron absorption may differ between FS and SFC in concomitant use with antacids.

著者

小田 晃規 伊藤 聡信 辻本 篤 グエン チュン・タン 黒田 重靖

出版者

基礎有機化学会(基礎有機化学連合討論会)

雑誌

基礎有機化学討論会要旨集(基礎有機化学連合討論会予稿集)

巻号頁・発行日

vol.37, pp.142-142, 2007

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ピロリジンと2当量のアルデヒドを加熱・加圧下反応させることで1,3-ジアルキルピロールが簡便に合成できることを見出した。ベンズアルデヒド類およびalpha位にアルキル置換されたアルカナールを用いた反応では中ないし高程度の収率でピロール生成物が得られる。合成した1,3-ジアルキルピロールとTCNEとの反応を検討したところ二種類のトリシアノビニルエチレン置換体が生成物として得られ, 各種スペクトデータならびにX線結晶構造解析からそれらの生成物の構造を確認し、be-ta位置換生成物を主に与えることが判明した。これらの結果ならびに反応機構についての考察について発表する。

著者

俵 那至 大矢 仁史 矢次 知明 平林 欣也 小田 晃輔

出版者

一般社団法人 環境資源工学会

雑誌

環境資源工学 (ISSN:13486012)

巻号頁・発行日

vol.66, no.4, pp.128-132, 2020 (Released:2020-09-30)

参考文献数

5

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“Art Clay Silver (Silver Clay)”, developed as a silver recycled product, is a mixture of fine powdered silver and binder for easily making silver accessories after sintering at 650°C. In this study, in order to find the optimum binder amount to maximize the strength of the sintered product, the filling structure of sintered Silver Clay was analyzed at various binder amounts under three particle size fractions (fine, coarse, and their equal weight mixture) on the basis of the measurements of porosity, shrinkage rate, strength, and pore size distribution together with SEM observation. As a result, we found that the filling structure was controlled by changing the particle size and the binder amount, and that the binder addition of 5–8% to fine particle fraction yielded the minimum porosity and maximum strength.

著者

小田 晃造

出版者

九州大学

巻号頁・発行日

1998

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博士論文

著者

小田 晃 大野 宏之 本郷 國男 小川 淳一 浅野 広樹

出版者

社団法人 砂防学会

雑誌

砂防学会誌 (ISSN:02868385)

巻号頁・発行日

vol.52, no.6, pp.32-37, 2000

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The hydraulic model experiment is used often to make the design of Sabo works. But reports to confirm the reliability of the hydraulic model experiment are not so much. Because the plan flood occurrence is rare in the field.<br>In this report, the hyetograph and the maximum rainfall in September 15-16, 1998 at Uono river were compared with the plan. And the peak discharge during this flood was guessed by the maximum rainfall and the catchment area around Uono river. Those were shown to almost equal the plan from this study.<br>The hyerograph was guessed from data of water level on Oogawara gaging station at the confluence of Daigenta river and Uono river during this flood. And the disaster occurrence time and location during this flood were compared with the experiment results under the same arrangement condition of Sabo facilities. The trend of those coincided with the experiment results.<br>We compared the flood scale and flood situation of field with the plan flood and the experiment results. Those in the field almost equaled the plan and the experiment. And it was shown that the hydraulic model experiment was useful to make the design of Sabo works from this report.

著者

末宗 洋 上野 貢嗣 川原 哲也 小田 晃造 舟越 和久 酒井 浄

出版者

天然有機化合物討論会実行委員会

雑誌

天然有機化合物討論会講演要旨集 27 (ISSN:24331856)

巻号頁・発行日

pp.108-114, 1985-09-07 (Released:2017-08-18)

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In the synthesis of natural products consisting of the basic structure of cyclopentane ring, variously functionalized cyclopentanones are required as starting materials. Previously, we succeeded in a simple, highly stereospecific synthesis of the cis-3,4-disubstituted cyclopentanones by the mild reaction with RhCl(PPh_3)_3. By the application of this newer cyclization reaction, we have succeeded in the synthesis of cis,cis-dihydronepetalactone, prostanoic acid, 8-isoprostanoic acid, (+)-brefeldin A and carbacyclin in the optically active form from limonene or Corey lactone. These compounds were synthesized via the following key steps. 1) 3-(3-Oxobutyl)cyclopentanone was easily converted to the deconjugated bicyclic enone (3→4). 2) The regioselective alkylation of limonene was performed by using s-BuLi-TMEDA (1→8). 3) The cis-3,4-disubstituted cyclopentanone from limonen-10-ol could be converted to the trans-3,4-disubstituted cyclo-pentanone by the epimerization (15→16, 22→23).

著者

末宗 洋 小田 晃造 佐伯 清太郎 酒井 浄

出版者

公益社団法人日本薬学会

雑誌

Chemical & pharmaceutical bulletin (ISSN:00092363)

巻号頁・発行日

vol.36, no.1, pp.172-177, 1988-01-25

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This paper describes the conversions of (-)-limonene to four nepetalactones (1,2,ent-3 and 4) in a stereocontrolled manner. The cis-3,4-disubstituted cyclopentanone (5) obtained from (-)-limonene via Rh(I)-catalyzed cyclization of the 4-pentenal, could be converted to the bicyclo[3.3.0]octenone (6). After the stereoselective conversion of 6 into the diastereomeric isomers of the ketones (8 and 16), a sequence of reactions involving the silyl enol ethers (18 and 19), ozonolysis, and subsequent lactonization afforded the target molecules.

著者

末宗 洋 上野 貢嗣 川原 哲也 小田 晃造 舟越 和久 酒井 浄

出版者

天然有機化合物討論会実行委員会

雑誌

天然有機化合物討論会講演要旨集

巻号頁・発行日

vol.27, pp.108-114, 1985

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In the synthesis of natural products consisting of the basic structure of cyclopentane ring, variously functionalized cyclopentanones are required as starting materials. Previously, we succeeded in a simple, highly stereospecific synthesis of the cis-3,4-disubstituted cyclopentanones by the mild reaction with RhCl(PPh_3)_3. By the application of this newer cyclization reaction, we have succeeded in the synthesis of cis,cis-dihydronepetalactone, prostanoic acid, 8-isoprostanoic acid, (+)-brefeldin A and carbacyclin in the optically active form from limonene or Corey lactone. These compounds were synthesized via the following key steps. 1) 3-(3-Oxobutyl)cyclopentanone was easily converted to the deconjugated bicyclic enone (3→4). 2) The regioselective alkylation of limonene was performed by using s-BuLi-TMEDA (1→8). 3) The cis-3,4-disubstituted cyclopentanone from limonen-10-ol could be converted to the trans-3,4-disubstituted cyclo-pentanone by the epimerization (15→16, 22→23).

著者

村田 康乃 篠田 日菜子 大平 雅之 松本 尚子 宮武 滝太 堀野 良和 小田 晃規 黒田 重靖

出版者

基礎有機化学会(基礎有機化学連合討論会)

雑誌

基礎有機化学討論会要旨集(基礎有機化学連合討論会予稿集)

巻号頁・発行日

vol.2011, pp.248-248, 2011

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1,6-メタノ-2,3-シクロペンタジエノ[10]アヌレンとジクロロケテンとの反応により付加体を得た。ついで,これを加水分解すると1,6-メタノ-2,3-トロポロノ[10]アヌレンの異性体 (1)、(2) が得られた。また現在更に3,4-ジホルミルフランを原料として新規な合成経路により1,6-メタノ-2,3-シクロペンタジエノ[10]アヌレンの合成を行った。これから、3,4-異性体 (3),(4) の合成を行っている。