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Yokohama, Japan

Chiyoda Corporation is a large Japanese engineering company specialising in industrial facilities, particularly oil refineries and LNG facilities. Most of its business takes place outside Japan, normally in the Middle East.In the late 1960s it built the Jeddah and Riyadh refineries in Saudi Arabia; at present its large projects include LNG plants in Qatar, the Sakhalin-II project in eastern Russia, and a variety of specialist-chemical and pharmaceutical plants in Japan itself.It was, in 2005, the first engineering company in the world to be included in the FTSE4Good index of companies with exemplary corporate social responsibility.It had a 484 billion yen revenue and 23.5 billion yen profit in 2006. Wikipedia.

Fujigaya T.,Kyushu University | Nakashima N.,Kyushu University | Nakashima N.,Chiyoda Corporation
Advanced Materials | Year: 2013

Toward the next generation fuel cell systems, the development of a novel electrocatalyst for the polymer electrolyte fuel cell (PEFC) is crucial to overcome the drawbacks of the present electrocatalyst. As a conductive supporting material for the catalyst, carbon nanotubes (CNTs) have emerged as a promising candidate, and many attempts have been carried out to introduce CNT, in place of carbon black. On the other hand, as a polymer electrolyte, polybenzimidazoles (PBIs) have been recognized as a powerful candidate due to the high proton conductivity above 100 °C under non-humid conditions. In 2008, we found that these two materials have a strong physical interaction and form a stable hybrid material, in which the PBIs uniformly wrap the surfaces of the CNTs. Furthermore, PBIs serve as effective binding sites for the formation of platinum (Pt) nanoparticles to fabricate a ternary composite (CNT/PBIs/Pt). In this review article, we summarize the fundamental properties of the CNT/PBIs/Pt and discuss their potential as a new electrocatalyst for the PEFC in comparison with the conventional ones. Furthermore, potential applications of CNT/PBIs including use of the materials for oxygen reduction catalysts and reinforcement of PBI films are summarized. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Satoh H.,Chiyoda Corporation | Manabe S.,RIKEN
Chemical Society Reviews | Year: 2013

This tutorial review focuses on the design of glycosyl donors, especially on attempts to control selectivity/reactivity by employing bulky substituents, cyclic protecting groups, or bridged structures. These structural modifications are performed to change the conformational distributions of pyranoside/ furanoside rings. We also briefly discuss this issue with regard to studies on furanosides and enzymatic glycosylation reactions. Readers will find that some of the designed glycosyl donors have been used to achieve total syntheses of natural products. © 2013 The Royal Society of Chemistry. Source

Koizumi T.,Chiyoda Corporation
Journal of Cleaner Production | Year: 2013

The Japanese government is promoting a biofuel program to deal with environmental and energy security problems and to promote rural development. This study is an economic analysis of domestic biofuel markets and programs and reviewing the Japanese biofuel program. At present, verification tests and large-scale projects for biofuel production have been launched, but current agricultural products based on biofuel production have experienced some problems in the way of high production costs, securing feedstock, and food availability. Japan is promoting the production of biofuel from cellulose and unused resources, and the R&D for second-generation biofuel is very active. The Japanese government needs to continue to assist on these research projects in the mid- to long term so Japan can increase its domestic biofuel production and imports in the future. The most crucial task for the Japanese biofuel program is establishing sustainable criteria for biofuel, which determine the limitations of GHG emissions, and pay close attention to bio-diversity, food availability, and social consequences. To realize these goals, further research and dialog with related countries and regions will be required. © 2010 Elsevier Ltd. All rights reserved. Source

A series of K salts of sulfonic acids have been tested as a cocatalyst for Ru-catalyzed C-H arylation. Among them, K 2, 4, 6-trimethylbenzenesulfonate (TMBSK) was found to be most active, and generality of the reaction was confirmed for a variety of nitrogen-containing heterocycles to give corresponding functionalized biaryls in high yields. The present methodology was applied to a practical synthesis of Candesartan Cilexetil. © 2014 American Chemical Society. Source

Stephens A.M.,Chiyoda Corporation
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2014

The surface code is a promising candidate for fault-tolerant quantum computation, achieving a high threshold error rate with nearest-neighbor gates in two spatial dimensions. Here, through a series of numerical simulations, we investigate how the precise value of the threshold depends on the noise model, measurement circuits, and decoding algorithm. We observe thresholds between 0.502(1)% and 1.140(1)% per gate, values which are generally lower than previous estimates. © 2014 American Physical Society. Source

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