Akira Nakamura

Saitama Institute of Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Unique chemical behavior and bonding of early-transition-metal-diene complexes

Accounts of Chemical Research (1985)

Hajime Yasuda Kazuyuki Tatsumi Akira Nakamura

ADVERTISEMENT RETURN TO ISSUEPREVArticleUnique chemical behavior and bonding of early-transition-metal-diene complexesHajime Yasuda, Kazuyuki Tatsumi, and Akira NakamuraCite this: Acc. Chem. Res. 1985, 18, 4, 120–126Publication Date (Print):April 1, 1985Publication History Published online1 May 2002Published inissue 1 April 1985https://pubs.acs.org/doi/10.1021/ar00112a004https://doi.org/10.1021/ar00112a004research-articleACS PublicationsRequest reuse permissionsArticle Views455Altmetric-Citations162LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Icon

10.1021/ar00112a004

Cite

Citations (165)

Asymmetric Bromolactonization Catalyzed by a C₃‐Symmetric Chiral Trisimidazoline

Angewandte Chemie International Edition (2010)

Kenichi Murai Tomoyo Matsushita Akira Nakamura Shunsuke Fukushima Masato Shimura

A productive alliance: In an enantioselective organocatalytic bromolactonization of 5-substituted hex-5-enoic acids (see scheme), it appears that the formation of an ion pair through interaction of the trisimidazoline catalyst 1 with the substrate both creates a chiral environment and promotes the cyclization by activating the carboxylic acid. DBDMH=1,3-dibromo-5,5-dimethylhydantoin.

10.1002/anie.201005409

Cite

Citations (234)

ChemInform Abstract: TEILWEISE SPALTUNG RACEMISCHER TERTIAERER PHOSPHINE MIT ASYMMETRISCHEN PALLADIUMKOMPLEXEN

Chemischer Informationsdienst Organische Chemie (1971)

Sei Otsuka Akira Nakamura T. Kano Kazuhide Tani

Abstract Der Komplex (+)‐(I) wird aus (‐)‐N,N‐Dimethyl‐oz‐phenyl‐äthylamin und Na‐tetrachloropalladat (II) dargestellt (90% Ausbeute).

10.1002/chin.197144068

Cite

Citations (0)

Protection of Proton-Initiated Ligand Dissociation from Hg(II) Complexes with Bulky Cholyl Amide Arenethiolate by NH···S Hydrogen Bonding in an Aqueous Micellar Solution

Inorganic Chemistry (1999)

Norikazu Ueyama M. Inohara Akira Onoda Takafumi Ueno Taka‐aki Okamura

Mercury(II) complexes which have a bulky cholyl amide group at the ortho or para position of benzenethiolate, Hg[S-2-{C23H36(OH)3}CONHC6H4]2 (1) with an intramolecular NH···S hydrogen bond and Hg[S-4-{C23H36(OH)3}CONHC6H4]2 (2), were synthesized to prepare an aqueous micellar solution. A hydrated Hg(II) ion was formed from the Hg(II) thiolate complexes, 1 and 2, at the ligand dissociation point (pH 4.0 and 4.9, respectively) near the pKa values (5.7 and 7.0, respectively) of the corresponding thiols. The hydrated Hg(II) ion was detected by the formation of Hg(0) species reduced with Na2S2O4 in an aqueous micellar solution. The NH···S hydrogen bond lowers the pKa value of the conjugated thiol to protect the Hg−S bond from dissociation by water under neutral conditions.

Amide

Thiol

10.1021/ic9811042

Cite

Citations (15)

1009 Development of Sophisticated Method for Thermal Fatigue Prevention : (1) Research Plan to Develop Knowledge-base and Evaluation Method

The Proceedings of the Materials and Mechanics Conference (2010)

Naoto Kasahara Akira Nakamura Masakazu OKAZAKI Masayuki Kamaya

Fluid temperature fluctuates at an incomplete mixing area of high and low temperature fluids in nuclear components. Temperature stratified layer tends to appear at cooled stagnant branch pipe. To prevent thermal fatigue due to above thermal loads, the JSME guideline is adopted. Development of knowledgebase and sophisticated method for thermal fatigue was planned to validate and justify the above guideline which was not revised. This paper describes the objectives and the plan for thermal fatigue issue.

Guideline

Thermal fatigue

Base (topology)

Development plan

10.1299/jsmemm.2010.1203

Cite

Citations (0)

Redox potentials of oligopeptide/Fe4S42+ complexes. Remarkable positive shift of the redox potential with (benzyloxycarbonyl)-L-Cys-Gly-L-Ala-L-Cys-OMe as chelating ligands

Inorganic Chemistry (1985)

Norikazu Ueyama Atsushi Kajiwara Toshitsugu Terakawa Satoru Ueno Akira Nakamura

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox potentials of oligopeptide/Fe4S42+ complexes. Remarkable positive shift of the redox potential with (benzyloxycarbonyl)-L-Cys-Gly-L-Ala-L-Cys-OMe as chelating ligandsNorikazu Ueyama, Atsushi Kajiwara, Toshitsugu Terakawa, Satoru Ueno, and Akira NakamuraCite this: Inorg. Chem. 1985, 24, 26, 4700–4704Publication Date (Print):December 1, 1985Publication History Published online1 May 2002Published inissue 1 December 1985https://pubs.acs.org/doi/10.1021/ic00220a053https://doi.org/10.1021/ic00220a053research-articleACS PublicationsRequest reuse permissionsArticle Views109Altmetric-Citations23LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

Oligopeptide

10.1021/ic00220a053

Cite

Citations (26)

OPTIMUM GROUND CONDITIONS AND STANDARD SPECIFICATIONS FOR CEMENT POWDER GROUTING METHOD

Doboku Gakkai Ronbunshu (1997)

Takahiko Fujisawa Akira Nakamura Yoshikazu Yamaguchi Masahiro Kobayashi Eiichi Onuma

表面改質した超微粒セメント粉体を圧縮空気とともに地盤中に浸透注入する「粉体圧送グラウチング」は, 軟岩地盤を対象に研究が進められてきた遮水性改良工法である. 本論文では, まず, 粉体圧送グラウチング用に開発した注入材料を紹介した. 次に, 粉体圧送グラウチングの適用性を明確にする目的で実施した, 原地盤より採取した不攪乱試料および砂供試体への室内注入試験, 注入固化体の顕微鏡観察, および注入材料の遮水性, 硬化特性について述べ, 粉体圧送グラウチングの適用地盤, および適用地盤に対する標準的な注入仕様を提案した.

10.2208/jscej.1997.582_183

Cite

Citations (1)

ChemInform Abstract: Diverse Reaction Courses in the Controlled Carbometalation of Heterocumulenes with Zirconium‐Diene Complexes and Molecular Structures of Carbon Dioxide, Isocyanate, and Ketene 1:1 and 1:2 Inserted Compounds.

ChemInform (1989)

Hajime Yasuda Takuji Okamoto Yuta Matsuoka Akira Nakamura Y. KAI

Abstract The carbometalation of various heterocumulenes (CO 2 , isocyanates, ketenes) is systematically investigated by using a series of Zr‐diene complexes of the type ZrL2(s‐cis‐diene) and ZrL2(s‐trans‐diene) (L: η5‐C5H5, η5‐C5Me5; diene: butadiene, isoprene) to clarify the essential factors in determining the regio‐ and stereochemistry of the products.

Diene

Isocyanate

Isoprene

10.1002/chin.198933258

Cite

Citations (0)

Error Recovery Techniques Focused on Revival Process from Failures in Robotic Manufacturing Plants

Proceedings of International Conference on Artificial Life and Robotics (2023)

Akira Nakamura Kensuke Harada

In recent years, working robots have been used in various fields, from manufacturing industries to domestic living spaces.An increasing number of difficult tasks are performed by robots, introducing a necessity for error recovery techniques.Our proposed error recovery technique is based on a method of returning to the process before the step in which the failure occurred and starting over.Of course, in practice, not only such a backward recovery but also a forward recovery that moves forward even after a failure occurs is used.In this study, we consider various paths from failure occurrence to recovery execution.

10.5954/icarob.2023.os16-2

Cite

Citations (0)

New Indicators for Optimal Dialysis Based on Creatinine Kinetics

The Journal of Kansai Medical University (2001)

Yasuhiro Isami Toshihiro Ikuma M Okamoto Shunpei Mizutani Mikiko Muramatsu

Background; Creatinine (Cr) is supposed to be uniformly distributed in body fluid, as is the case with urea nitrogen (UN). We calculated the normalized dialyser serum Cr (S-Cr) clearnce (Kt/Vcr), time averaged concentration of S-Cr (TACcr), and creatinine generation rate per body weight (gCr) on the basis of creatinine kinetics instead of urea k inetics and assessed whether these parameters would provide useful new indicators for optimal dialysis. Methods; Blood UN (BUN) and S-Cr values were measured in 13 hemodialysis patients immediately before and after a session of dialysis and immediately before the next session. Based on these measurements, the new indicators were calculated and compared with the conventional indicators [normalized dialyser urea clearnce (Kt/Vurea), time averaged concentration of BUN (TACBUN), protein catabolic rate (per) ]. Results; There was a significant positive correlation (r = 0.95, P<0.001) between Kt/Vcr (1.05 ± 0.15) and Kt/Vurea, and between TACcr (9.9 < 1.6) and TACBUN (r = 0.85, P <0.001). The gCr (27.9 < 5.5mg/kg/day) also correlated with per. Conclusion; Kt/Vcr and TACcr can be new indicators for optimal dialysis. The gCr may serve as a comprehensive indicator of nutritional conditions in hemodialysis patients.

Blood urea nitrogen

Kt/V

Serum urea

Dialysis adequacy

10.5361/jkmu1956.53.2-4_125

Cite

Citations (0)