著者

間嶋 寛紀 赤井 純治 茅原 一也 中牟田 義博 松原 聡

出版者

Japan Association of Mineralogical Sciences

雑誌

日本鉱物学会年会講演要旨集

巻号頁・発行日

pp.138, 2003 (Released:2004-07-26)

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新潟県青海・糸魚川地域のヒスイ輝石岩中にはヒスイ輝石岩形成以降に形成された二次的な脈が多く存在し,ここからはSrを主成分とする鉱物が多く産したが,蓮華石もその一つである 蓮華石(rengeite)Sr4ZrTi4 (Si2O7) 2O8は新潟県西部,青海・糸魚川地域の蛇紋岩メランジ中に含まれるヒスイ輝石岩から発見された(Miyajima et al.,2001).蓮華石は単斜晶系に属し,格子定数はa=13.97(1),b=5.675(7),c=11.98(1)Åである. 今回新潟県青海町産白色ヒスイ輝石岩を調べている中で二次的な脈の中から蓮華石様鉱物を見出した。肉眼あるいは双眼実体顕微鏡下では淡灰色から暗青灰色の色を示し長さ1mm以下の脈状集合体または長さ0.2mm以下の短柱状自形結晶をなして産する.共生鉱物は脈を埋めて産するソーダ沸石と,初生的に形成されたジルコンである.ヒスイ輝石は0.5mm以下の自形から半自形で,しばしば脈状に著しい破砕を受けている.この蓮華石様鉱物の短柱状の形態はこの試料以外ではほとんど見られず,他の試料では蓮華石は放射針状の結晶集合体をなすことが多い.本試料は偏光顕微鏡下では濃青色から淡褐色の強い多色性を示すものと,多色性を示さないものとがあり,短柱状の単結晶の柱面に平行にzoningしているものが多い.通常の薄片の厚さではわからないが,イオン研磨により極めて薄くした薄片ではクロスニコルでバンド状の組織が認められることがある.この蓮華石様鉱物は非常に小さいため,イオン研磨にて試料を作り,透過型電子顕微鏡で解析した.EDSによる定量分析では組成はSiO2=23.0,TiO2=28.3,Fe2O3=0.4,SrO=41.3,ZrO2=6.7,Nb2O5=0.4 wt.%という値が得られた.電子線回折では蓮華石のd001周期が2倍の位置に回折スポットを示し,いくつもの回折パターンの特徴から蓮華石の多形,斜方晶系相と解釈される.Auを標準としたEDパターンの解析から,この鉱物の格子定数はa=14.0,b=5.7,c=21.9Åである.この斜方晶系単位格子は,輝石,角閃石等と類似の,単斜晶系単位格子が格子レベルでの双晶を作った格子関係にある.高分解能像では双晶構造に対応する像が解像される.なお,蓮華石の原構造ともいうべきperrierite (Ce,La,Ca,Sr)4FeTi4 (Si2O7) 2O8,chevkinite(Ce,Ca,Th)4(Fe,Mg) (Ti,Mg,Fe) 4(Si2O7)2O8には斜方晶系の報告はされていない.この蓮華石様鉱物については現在ガンドルフィーカメラ,XMA他でさらに検討中である.

著者

Sayantani CHATTERJEE Debaditya BANDYOPADHYAY Eiichi TAKAZAWA Katsuyoshi MICHIBAYASHI

出版者

Japan Association of Mineralogical Sciences

雑誌

Journal of Mineralogical and Petrological Sciences (ISSN:13456296)

巻号頁・発行日

vol.116, no.3, pp.170-175, 2021 (Released:2021-07-17)

参考文献数

27

被引用文献数

1

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Oxidation states within the planetary interior are intrinsically linked with the broad scale tectonism; however, it is difficult to estimate the actual oxidation conditions. Orthopyroxene–magnetite symplectite formed by olivine oxidation may provide a significant clue into such oxidation events. Here we report detailed mineralogical and petrological synthesis of such orthopyroxene–magnetite symplectites from olivine gabbros of Oman Ophiolite (Hole GT2A, ICDP Oman Drilling Project). In order to understand how oxidation affects different olivine compositions, we employed a phase equilibria approach and computed several temperature–composition diagrams at a fixed pressure (1 kbar). Our experiments predict the coexistence of olivine with Fo75–76 and Fo71 with the orthopyroxene (En79 and En76), respectively, which is remarkably similar to the mineral chemistry obtained from the Oman lower crustal gabbros. From the magnetite content, we also infer that the symplectite formation may have taken place over a range of temperatures (600–1000 °C) via subsolidus olivine oxidation and/or melt (oxidizing)–olivine interaction. The latter is more probable, considering the partial occurrence of orthopyroxene and clinopyroxene rim adjacent to the symplectites.

著者

田中 健二

出版者

一般社団法人 日本メディア英語学会

雑誌

時事英語学研究 (ISSN:21861420)

巻号頁・発行日

vol.1993, no.32, pp.17-28, 1993-09-01 (Released:2012-11-13)

参考文献数

13

著者

外山 浩司 竹下 隆晴 松井 信行

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.117, no.8, pp.1033-1038, 1997-07-20 (Released:2008-12-19)

参考文献数

9

被引用文献数

2 5

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PWM control is promising to achieve a unity power factor and to improve the input current distortion in a high performance current-source three-phase AC/DC converter system. In contrast to the voltage-source converter, the LC filter connected between the source and the converter may cause an LC resonance both in steady and transient states. Many reports have been published to improve the current distortion in steady state and to suppress the current oscillation in transient state of the current-source PWM converter by using the feedback control.This paper gives an analysis of the transient oscillation of the filter voltage and current, and proposes a simple open-loop suppression method by using the rate limiter of the input current reference. Furthermore, the design rule of the LC filter for the suppression control of the transient oscillation is described. The effectiveness of the proposed approach has been verified by experiments.

著者

原渕 保明 藤枝 重治

出版者

日本鼻科学会

雑誌

日本鼻科学会会誌 (ISSN:09109153)

巻号頁・発行日

vol.50, no.1, pp.77-79, 2011 (Released:2011-04-28)

著者

Ryo Nakabayashi Tomoko Nishizawa Tetsuya Mori Hiroshi Sudo Isao Fujii Takashi Asano Kazuki Saito

出版者

Japanese Society for Plant Biotechnology

雑誌

Plant Biotechnology (ISSN:13424580)

巻号頁・発行日

vol.36, no.4, pp.265-267, 2019-12-25 (Released:2019-12-27)

参考文献数

6

被引用文献数

8

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Asparaptine, a conjugate of L-arginine and asparagusic acid, was found in green asparagus (Asparagus officinalis) using ultrahigh-resolution metabolomics for sulfur-containing metabolites (S-metabolites), called S-omics. Asparaptine has been shown to inhibit the activity of angiotensin-converting enzyme. Larger amounts of this S-metabolite are therefore required for further analysis; however, there are limitations that asparagus is a perennial plant and its spears, wherein asparaptine accumulates, can be mainly harvested at the spring to summer season. In order to overcome these, we prepared a callus and suspension cell line from green asparagus. Untargeted metabolome analysis using liquid chromatography-tandem mass spectrometry was performed in the materials as well as spears and three calluses derived from wild type Asparagus. The analysis demonstrated that the amount of asparaptine in the callus derived from the green asparagus was more than the others per mg dry weight. The suspension cell line treated with methyljasmonate showed the induction of asparaptine, suggesting that the asparaptine production is modifiable under appropriate culture conditions. The described materials can be utilized for the production of asparaptine and in integrated metabolomics to study the biosynthesis of this S-metabolite, which is currently unknown.

著者

織田 直文

出版者

Japan Association for Cultural Economics

雑誌

文化経済学 (ISSN:13441442)

巻号頁・発行日

vol.3, no.1, pp.117-120, 2002-03-31 (Released:2009-12-08)

参考文献数

18

著者

立間 徹

出版者

公益社団法人 日本表面科学会

雑誌

表面科学 (ISSN:03885321)

巻号頁・発行日

vol.29, no.6, pp.350-355, 2008-06-10 (Released:2008-06-22)

参考文献数

27

被引用文献数

1 2

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Photoinduced charge separation is possible at interfaces between Au or Ag nanoparticles and TiO2. The charge separation is based on localized surface plasmon resonance of the metal nanoparticles. The Au-TiO2 system can be applied to visible light-responsive photocatalysts and photovoltaic cells. If Ag is used instead of Au, visible light-induced oxidation and UV light-induced re-reduction of Ag nanoparticles are possible. These new photoelectrochemical processes can be applied to multicolor photochromism and photoelectrochemical actuators based on hydrogels.

著者

立間 徹

出版者

東京大学生産技術研究所

雑誌

生産研究 (ISSN:0037105X)

巻号頁・発行日

vol.64, no.5, pp.789-796, 2012-09-01 (Released:2013-03-04)

著者

市川 真人

出版者

一般社団法人 照明学会

雑誌

照明学会誌 (ISSN:00192341)

巻号頁・発行日

vol.74, no.12, pp.792-795, 1990-12-01 (Released:2011-07-19)

参考文献数

13

著者

河村 フジ子 松本 睦子 金 和子 小林 彰夫

出版者

一般社団法人 日本家政学会

雑誌

日本家政学会誌 (ISSN:09135227)

巻号頁・発行日

vol.40, no.12, pp.1051-1056, 1989-12-05 (Released:2010-03-10)

参考文献数

11

被引用文献数

1

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辛味大根の味覚特性として, 辛味成分と辛味以外で味覚に関与する成分を他の大根と比覚し, 官能検査を行った結果を要約すると次のようになる.(1) 辛味大根中の辛味成分である (E) -4-メチルチオ-3-ブテニルイソチオシアネートは, 73.7mg%で, 他品種の頭部の3.4~5.2倍, 尾部の2.0~2.6倍である.(2) 辛味大根は, 他品種の各部より, 水分, 還元糖量が少なく, カルシウム, マグネシウム量が多い.(3) 他品種のおろし大根の味を比較した場合, 尾部は頭部より, 辛味, 苦味が強く, うま味, 甘味が弱い。(4) おろし辛味大根の味は, 青首大根の尾部より, 辛味, 苦味が強く, うま味, 甘味が弱い.(5) おろし辛味大根を60分放置すると, 辛味は顕著に弱くなる.(6) おろし辛味大根に食塩, しょうゆ, 食塩+食酢, 天つゆ, 三杯酢を加えると辛味が弱くなる.

著者

神立 誠 斎藤 洋子

出版者

公益社団法人 日本農芸化学会

雑誌

日本農芸化学会誌 (ISSN:00021407)

巻号頁・発行日

vol.42, no.8, pp.479-484, 1968 (Released:2008-11-21)

参考文献数

17

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筋肉の核酸定量において,Schneider法とSchmidt- Thannhauser法とを比較検討した.筋肉の核酸定量にはSchneider法も使用できるが,適当な抽出条件の範囲が狭いので,Schmidt-Thannhauser法を使用する方が望しい.その操作は次のとおりである.均質化した筋肉を冷0.2 NHC1O4で3回抽出して酸溶性物質を除去し,脱脂せずに0.5 N KOH,3~4時間または 1.0 NKOH,1~2時間37°CでRNAを酸溶牲化し,氷冷してからHC104な加えて0.2 N濃度としてDNA区分を沈澱させる.その上澄液についてRNAをオルシン法で定量する.RNA抽出残漬は0.75~1.0 NHC1O4に懸濁し,70°Cで20分間DNAを抽出し,DNAをインドール法で定量する.

著者

Keita Yaginuma Shuichi Tanabe Hirokazu Sugiyama Manabu Kano

出版者

The Pharmaceutical Society of Japan

雑誌

Chemical and Pharmaceutical Bulletin (ISSN:00092363)

巻号頁・発行日

vol.69, no.6, pp.548-556, 2021-06-01 (Released:2021-06-01)

参考文献数

22

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Soft sensors play a crucial role as process analytical technology (PAT) tools. They are classified into physical models, statistical models, and their hybrid models. In general, statistical models are better estimators than physical models. In this study, two types of standard statistical models using process parameters (PPs) and near-infrared spectroscopy (NIRS) were investigated in terms of prediction accuracy and development cost. Locally weighted partial least squares regression (LW-PLSR), a type of nonlinear regression method, was utilized. Development cost was defined as the cost of goods required to construct an accurate model of commercial-scale equipment. Eleven granulation lots consisting of three laboratory-scale, two pilot-scale, and six commercial-scale lots were prepared. Three commercial-scale granulation lots were selected as a validation dataset, and the remaining eight granulation lots were utilized as calibration datasets. The results demonstrated that the PP-based and NIRS-based LW-PLSR models achieved high prediction accuracy without using the commercial-scale data in the calibration dataset. This practical case study clarified that the construction of accurate LW-PLSR models requires the calibration samples with the following two features: 1) located near the validation samples on the subspace spanned by principal components (PCs), and 2) having a wide range of variations in PC scores. In addition, it was confirmed that the reduction in cost and mass fraction of active pharmaceutical ingredient (API) made the PP-based models more cost-effective than the NIRS-based models. The present work supports to build accurate models efficiently and save the development cost of PAT.

著者

杉原 厚吉

出版者

一般社団法人 日本応用数理学会

雑誌

応用数理 (ISSN:24321982)

巻号頁・発行日

vol.1, no.4, pp.280-299, 1991-12-16 (Released:2017-04-08)

被引用文献数

1

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New approaches are presented to the problem of topological inconsistency caused by geometric algorithms implemented in finite-precision arithmetic. In geometric computation numerical errors often create inconsistency in topological structures and thus cause theoretically correct algorithms to fail. To overcome this problem two approaches are considered for the case of constructing the Voronoi diagram as an example. In the first approach, higher-precision arithmetic is used to construct a closed world in which topological structures are judged always precisely, and the symbolic perturbation technique is employed to avoid complicated branches of processing for degenerate cases. In the second approach, the highest priority is placed on the maintenance of topological consistency and numerical results are used as lower-priority information; the resultant algorithm is robust in the sense that inconsistency never arises and is correct in the sense that the output converges to the true solution as the precision becomes higher.

著者

齋藤 洋昭

出版者

公益社団法人 日本油化学会

雑誌

オレオサイエンス (ISSN:13458949)

巻号頁・発行日

vol.11, no.3, pp.85-87, 2011-03-01 (Released:2013-07-18)

参考文献数

7

被引用文献数

1 1

著者

江口 一久

出版者

Japan Association for African Studies

雑誌

アフリカ研究 (ISSN:00654140)

巻号頁・発行日

vol.1985, no.27, pp.71-90, 1985-12-31 (Released:2010-04-30)

著者

針生 悦子 趙 麗華

出版者

公益社団法人 日本心理学会

雑誌

心理学研究 (ISSN:00215236)

巻号頁・発行日

vol.78, no.4, pp.424-432, 2007-10-25 (Released:2010-07-16)

参考文献数

13

被引用文献数

3 6

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Do non-native speakers of the Japanese language understand the symbolic values of Japanese onomatopoeia matching a voiced/unvoiced consonant with a big/small sound made by a big/small object? In three experiments, participants who were native speakers of Japanese, Japanese-learning Chinese, or Chinese without knowledge of the Japanese language were shown two pictures. One picture was of a small object making a small sound, such as a small vase being broken, and the other was of a big object making a big sound, such as a big vase being broken. Participants were presented with two novel onomatopoetic words with voicing contrasts, e.g., /dachan/vs./tachan/, and were told that each word corresponded to one of the two pictures. They were then asked to match the words to the corresponding pictures. Chinese without knowledge of Japanese performed only at chance level, whereas Japanese and Japanese-learning Chinese successfully matched a voiced/unvoiced consonant with a big/small object respectively. The results suggest that the key to understanding the symbolic values of voicing contrasts in Japanese onomatopoeia is some basic knowledge that is intrinsic to the Japanese language.

著者

金城 義信

出版者

日本海水学会

雑誌

日本海水学会誌 (ISSN:03694550)

巻号頁・発行日

vol.53, no.6, pp.432-438, 1999 (Released:2013-02-19)

参考文献数

6

著者

中村 尚史

出版者

日本学術会議協力学術研究団体 交通史学会

雑誌

交通史研究 (ISSN:09137300)

巻号頁・発行日

vol.31, pp.54-68, 1993-12-10 (Released:2017-10-01)

著者

中谷 隼 藤井 実 森口 祐一 平尾 雅彦

出版者

日本LCA学会

雑誌

日本LCA学会誌 (ISSN:18802761)

巻号頁・発行日

vol.4, no.4, pp.324-333, 2008 (Released:2012-05-26)

参考文献数

43

被引用文献数

1 1

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Background and Objective. In recent years, besides the domestics recycling, a part of Japanese post-consumer PET bottles are exported to and recycled in mainland China. In this study, life-cycle assessment was applied to the comparison of PET bottle recycling scenarios, including domestic recycling and transboundary recycling between Japan and China, from the viewpoint of CO2 emission and fossil fuel consumption. Results and Discussion. The following 10 scenarios based on our field surveys were evaluated: Japanese post-consumer PET bottles are (i) recycled into polyester staples in Japan, (ii) recycled into polyester filaments in Japan, (iii) recycled into polyester clothes in Japan, (iv) chemically decomposed and recycled into bottle-grade PET resin in Japan, (v) chemically decomposed and recycled into polyester filaments in Japan, (vi) (vii) recycled into polyester staples in two different flows in China, (viii) recycled into polyester clothes in China, (ix) incinerated and partly recovered as electricity in Japan, and (x) directly landfilled in Japan. The results showed that all the domestic and transboundary recycling scenarios had smaller impacts than the incineration scenario, and that the chemical recycling scenarios had larger impacts than the other recycling scenarios. The robustness of the results was examined against variability of background parameters for electricity supplies and against specification of virgin products substituted by recycled products. Conclusions. The differences of CO2 emissions and fossil fuel consumptions between domestic and transboundary recycling scenarios, other than the chemical recycling scenarios, were not large enough to be robust against the above-mentioned variability. In particular, the variability strongly influenced the results of the scenarios including cloth-manufacturing processes in their system boundaries.