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Nagoya-shi, Japan

Morikawa Y.,Aichi Institute of Technology | Ito M.,Aichi Institute of Technology | Umeda S.,Yoshida Kikai Co.
Kagaku Kogaku Ronbunshu

Pre-treatment system of cellulose biomass was investigated for the efficient production of bioethanol by enzymatic hydrolysis. A system of consecutive heating and high-pressure fluid milling was developed in which a part of the upstream piping of the mill was heated, which enables the cellulose biomass to be decomposed in single pass. Two cellulose biomasses, Japanese cedar with lignin and crystalline cellulose (CEOLUS TG (Asahi Chemical Industry Co., Ltd.)) without lignin, were treated by the system. When heated at 453 K (180°C), both samples were decomposed and fibrous particles were observed by SEM microscopy. Using cellulase and hemicellulase, enzymatic hydrolysis of the hydrothermally treated samples was demonstrated. When hydrolysis was performed using CEOLUS treated at various temperatures, high enzymatic degradation ratio was obtained under all heating conditions. Treatment at more than 423 K (150°C) gave a higher degradation ratio. When Japanese cedar samples were treated at 453 K for 110 h, holocellulose degradation ratio was two times higher than that for room temperature treatment, and α-cellulose degradation ratio was approximately three times higher. © 2010 The Society of Chemical Engineers, Japan. Source

Igarashi S.,Waseda University | Sato S.,Waseda University | Takashima T.,Yoshida Kikai Co. | Ogawa M.,Waseda University
Industrial and Engineering Chemistry Research

A layered calcium niobate, KCa2Nb3O10, with submicrometer sized particle was prepared by the solid-state reaction of potassium carbonate, calcium oxide, and niobium pentoxide in air at the temperatures of 900 °C, which is lower than the reported value (1100 °C). The lower temperature synthesis led to better results in the photocatalytic decomposition of methyl orange and the preparation of an aqueous suspension and thin film. © 2013 American Chemical Society. Source

Kato S.,Waseda University | Miyazaki Y.,Waseda University | Takashima T.,Yoshida Kikai Co. | Utaka K.,Waseda University
Technical Digest - 15th OptoElectronics and Communications Conference, OECC2010

Carbon nano tubes (CNT) attracts attention in the field of optical communication. However, CNT is too long as it is compared with the wavelength of communication wavelength and causes the scattering. So we could make CNT short and fat, and our devise showed saturable absorption. Source

Okada Y.,Tokyo University of Agriculture and Technology | Hosoya S.,Tokyo University of Agriculture and Technology | Hosoya S.,Yoshida Kikai Co. | Suzuki H.,Yoshida Kikai Co. | Chiba K.,Tokyo University of Agriculture and Technology
Organic Letters

A highly aggregating elastin peptide was prepared efficiently using a high pressure-liquid phase synthesis approach assisted by a soluble tag strategy. Two standard syringes were connected to each other to construct a reactor. This simple reactor was used to apply high pressure to the highly viscous reaction mixture thereby maintaining its fluidity. The reactions were completely inhibited due to aggregation when conducted in a standard flask reactor, whereas our high pressure approach accelerated the couplings to realize complete conversion within 5-7 min. All steps were conducted at 0.10 M concentration, affording grams of the desired product. © 2014 American Chemical Society. Source

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