Mie Prefecture Industrial Research Institute

Tsu-shi, Japan

Mie Prefecture Industrial Research Institute

Tsu-shi, Japan
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Yamazaki E.,Mie Prefecture Industrial Research Institute | Sago T.,Mie Prefecture Industrial Research Institute | Kasubuchi Y.,Taiyo Kagaku Co. | Imamura K.,Taiyo Kagaku Co. | And 4 more authors.
Carbohydrate Polymers | Year: 2013

Effect of the polysaccharide from leaves of Corchorus olitorius L. (PLC) on the freeze-thaw (FT) stability of corn starch gel was studied. PLC was incorporated into the starch gel at 0.7% and total solid was adjusted to 6.0%. The syneresis was measured by the centrifugal-filtration method and, as a result, addition of PLC reduced effectively the syneresis of the starch gel even after 5 FT cycles, which was less than one third that of the normal starch gel. The rheological changes of the starch/PLC gel during the FT treatments were evaluated while the gel remained on the rheometer plate. The starch/PLC gel had less significant changes in the rheological parameters during the FT cycles than starch/guar gum or xanthan gum gel systems. SEM images showed that PLC stabilized the gel matrix surrounding pores, which would contribute to both a lower syneresis production and a higher stability in the rheological behavior at FT. © 2013 Elsevier Ltd. All rights reserved.

Wada N.,Japan National Institute of Materials Science | Fujita K.,Japan National Institute of Materials Science | Inoue K.,Mie Prefecture Industrial Research Institute | Kojima K.,Ritsumeikan University
Surface and Coatings Technology | Year: 2015

To prepare transparent 90GeO2-10BaO-0.1MnO glass-ceramics for Mn4+ red fluorescence, a glass was prepared by a melt-quenching method, and then the glass was crystallized at 700 and 800°C for various seconds. The crystallization processes were investigated by measuring and observing the glass-ceramics using an XRD analyzer, an IR absorption spectrophotometer, a field emission scanning electron microscope, and a fluorescence spectrometer. As a result, for the heat treatment at 700°C, α-GeO2 and BaGe4O9 crystals doped with Mn4+ ions were formed with oxidation of Mn2+ ions to Mn4+ ones in the surface layer by heterogeneous nucleation. For the heat treatment at 800°C, by homogeneous crystallization with nano-sized phase separation, α-GeO2 and Mn4+:BaGe4O9 nanocrystals were formed in a GeO2-rich phase and an Mn4+ ions-containing BaO-rich phase, respectively. In this study, transparent 90GeO2-10BaO-0.1MnO glass-ceramics crystallized at 800°C for 102.0s by homogeneous crystallization with nano-sized phase separation, showed the strongest red fluorescence band due to the 2E(2G)→4A2(4F) transition of Mn4+ ions in the BaGe4O9 nanocrystals. © 2015 Elsevier B.V.

Matsuoka T.,Mie Prefecture Industrial Research Institute | Kanai H.,Shinshu University
Journal of Textile Engineering | Year: 2015

Sitting comfort of leather car seat, whose grain leather pattern were different, were evaluated by the sensory evaluation. Physical properties and body pressure distributions of leather car seat were also measured. The adjectives used for sensory evaluation were examined by principle component analysis. From the results of subjective measurements, samples with larger unevenness of the grain were evaluated as not high-quality, not relaxed and not comfortable. Samples with smaller unevenness of the grain and smooth were evaluated as simple, familiar and comfortable. From the use of principal component analysis, two principal components were obtained, therefore, the sitting comfort were evaluated by “high-class” and “familiar”. From the correlations between sensory evaluations and physical properties or body pressure distributions, the sitting comfort of leather car seat have correlations with the physical properties, which are friction properties of surface, and with the contact pressure of the mannequin and the car seat. From the correlations of tactile sensations and sitting images adjectives, the sitting comfort for leather car seat could not be predicted by the tactile sensations of leather car seat covers. There were greatly difference between the evaluation of sitting comfort for the fabric car seat and those for the leather car seat. © 2015 The Textile Machinery Society of Japan.

Matsuoka T.,Mie Prefecture Industrial Research Institute | Kanai H.,Shinshu University | Andou R.,Shinshu University | Wakako L.,Kanazawa University
Journal of Textile Engineering | Year: 2014

The tactile sensations of leather car seat covers with different grain patterns were evaluated by physical touch. The covers' physical properties were also measured. The tactile sensations were evaluated using adjectives like "high-class" and"smoothness" which were examinedusing principal component analysis. From the correlations between physical properties andsensory evaluations, it was foundthat tactile sensations correlate with the physical properties of compression andsurface friction. The tactile sensations of leather covers were influencedby the grain leather pattern, and those sensations could be predicted by the physical properties. These results will contribute to a final seat design. © 2013 The Textile Machinery Society of Japan.

Phoo-Ngernkham T.,Rajamangala University of Technology at Tawan-ok | Maegawa A.,Mie Prefecture Industrial Research Institute | Mishima N.,Mie University | Hatanaka S.,Mie University | Chindaprasirt P.,Khon Kaen University
Construction and Building Materials | Year: 2015

This article investigated the effects of sodium hydroxide and sodium silicate solutions on the properties of fly ash (FA)-granulated blast furnace slag (GBFS) geopolymer. Three types of geopolymer pastes viz., FA paste, FA + GGBS paste and GGBS paste were tested. They were activated with three types of alkaline solutions viz., sodium hydroxide solution (NH), sodium silicate solution (NS), and sodium hydroxide plus sodium silicate solution (NHNS). NH with 10 molar concentration, alkaline liquid/binder ratio of 0.60 and curing at ambient temperature of 23 °C were used for all mixes. The results indicated that the reaction products and strengths of geopolymer depended on the types of source materials and alkali activators. The use of NH and NHNS solutions resulted in the formation of crystalline calcium silicate hydrate (CSH) which co-existed with amorphous gel. Whereas the use of NS solution resulted in mainly the amorphous products with only a small amount of crystalline CSH in GBFS paste. The increase in GBFS content enhanced the compressive strength and microstructure of geopolymer pastes due to the formation of additional CSH. The shear bond strength between Portland cement concrete substrate and geopolymer paste was found to relate to both compressive strength and amount of NASH gel of geopolymer paste. © 2015 Published by Elsevier Ltd.

Takai-Yamashita C.,Nagoya Institute of Technology | Ishino T.,Nagoya Institute of Technology | Fuji M.,Nagoya Institute of Technology | Inoue K.,Mie Prefecture Industrial Research Institute
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2016

A ZnO supported hollow SiO2 (ZnO/h-SiO2) composite nanoparticle with a strong yellow emission has been prepared using the Zn(OAc)2 precursor with a catalytic amount of NaOH. A single nano-sized ZnO having defective oxygen homogeneously dispersed on the SiO2 shell. How this desired structure was achieved is discussed by comparison of three carrier nanoparticles of h-SiO2, calcite core-SiO2 shell (CS), and dense SiO2 (d-SiO2) which have several spaces where the precursor solution was trapped. That is, h-SiO2 has a micropore/hollow interior/interspace among the particles, CS has a micropore/interspace, and d-SiO2 only has an interspace. On the CS carrier, similar ZnO single nanoparticles were dispersed and the ZnO/CS composite showed a strong yellow emission. On the d-SiO2 carrier, aggregated ZnO nanoparticles were localized on part of the SiO2 surface. Consequently, the existence of micropores is the key structure to obtain the ZnO nanoparticle dispersion. During penetration of the ZnO precursor into the hollow interior through the micropores, dissociated Zn2+ ions adsorb on the SiO2 surface. Hydroxide ions (OH-) of NaOH then make contact with the adsorbed Zn2+ on the SiO2 shell to form ZnO. The micropore could work as a mold to prevent excess growth of the ZnO. The strong emission was also contributed by defects among the siloxane bonds in the SiO2 shell due to its light scattering ability. The obtained ZnO/h-SiO2 can be useful as a yellow phosphor of a white light emitting diode (LED). © 2015 Elsevier B.V.

Kurita O.,Mie Prefecture Industrial Research Institute | Murakami K.,Mie Prefecture Industrial Research Institute | Fujiwara T.,Mie Prefecture Industrial Research Institute
Polymer Bulletin | Year: 2010

Precipitation from alcohol used against fractionation of polysaccharides was applied as an energy-efficient chemical modification with only a co-precipitation of polysaccharide and the modifying agent in polar organic solvents, and drying. Addition of ethanol caused a conformational change of polysaccharides with increasing intramolecular hydrogen bonding and a dense structure in close proximity to atoms, especially, in the presence of modifying agents. Extent of modification depended on the structure of polysaccharides and pH in polar organic solvents. The co-precipitates in polar organic solvents seem to act as a precursor while still maintaining the integrity of the modified polysaccharides. Eventually, a small amount of polar organic solvents (1.5 times volume to the weight of the mixtures) to disperse the reaction mixtures was enough to complete modification. © Springer-Verlag 2009.

Murayama M.,Mie Prefecture Industrial Research Institute | Yamamoto Y.,Mie Prefecture Industrial Research Institute | Fujiwara M.,Mie Prefecture Industrial Research Institute
Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan | Year: 2016

For the purpose of use as anode active materials of lithium-ion secondary batteries, the group 14 elements (Si, Ge, Sn and Pb) and their oxides were investigated systematically. Ge(Ox) actually showed high capacity of around 1,200 mAh/g. This is corresponding to the fact that more than four moles of Li ions react to one mole of GeOx. Except for SiO2, the oxides of these elements generally showed relatively higher capacity and good cycle performance when compared to simple bodies. It is due to a conversion reaction to form Li2O. Vinylene carbonate (VC) addition and capacity limitation were effective on improvement of cycle performance for not only Si but also other elements and oxides. A summation factor of irreversible capacity shows that the quantities of solid-electrolyte interface formation are almost same in the case of PbO2-derived anode with/without the VC addition or the capacity limitation. © 2016 The Ceramic Society of Japan. All rights reserved.

Sago T.,Mie Prefecture Industrial Research Institute | Yamazaki E.,Mie Prefecture Industrial Research Institute
Japan Journal of Food Engineering | Year: 2016

The purpose of this study is to prepare ice cream and sorbet in small quantities and to measure the physical changes that take place during the freezing process using a starch pasting device. Ice cream and sorbet were prepared with 25 g of the mix using a starch pasting device rotating at 15 revolutions per second and a cooling rate of 1°C/min. The flavor of the ice cream and sorbet were almost the same as those prepared with a batch freezer. The increased rotation rate of the ice cream mix reduced the rate of increase in viscosity beyond the freezing point and elevated the levels of overrun after making the ice cream. As the cooling rate of the mix increased, the increase in the viscosity was found beyond the freezing point and the overruns increased after making the ice cream. The application of a starch pasting device allows numerical values to be ascribed to the changes taking place during the production of ice cream and sorbet. In conclusion, small scale production methods can contribute to reducing a large amount of waste generated during trial production and indeed facilitate the trial production of new ice cream products. © 2015, Japan Society for Food Engineering. All rights reserved.

Yamaoka C.,Mie Prefecture Industrial Research Institute | Kurita O.,Mie Prefecture Industrial Research Institute | Kubo T.,Mie Prefecture Industrial Research Institute
Microbiological Research | Year: 2014

The influence of non- Saccharomyces yeast, Kluyveromyces lactis, on metabolite formation and the ethanol tolerance of Saccharomyces cerevisiae in mixed cultures was examined on synthetic minimal medium containing 20% glucose. In the late stage of fermentation after the complete death of K. lactis, S. cerevisiae in mixed cultures was more ethanol-tolerant than that in pure culture. The chronological life span of S. cerevisiae was shorter in pure culture than mixed cultures. The yeast cells of the late stationary phase both in pure and mixed cultures had a low buoyant density with no significant difference in the non-quiescence state between both cultures. In mixed cultures, the glycerol contents increased and the alanine contents decreased when compared with the pure culture of S. cerevisiae. The distinctive intracellular amino acid pool concerning its amino acid concentrations and its amino acid composition was observed in yeast cells with different ethanol tolerance in the death phase. Co-cultivation of K. lactis seems to prompt S. cerevisiae to be ethanol tolerant by forming opportune metabolites such as glycerol and alanine and/or changing the intracellular amino acid pool. © 2014 Elsevier GmbH.

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