Bunkyo-ku, Japan
Bunkyo-ku, Japan

Matsuyama University is a private university in Matsuyama, Ehime, Japan. The predecessor of the school was founded in 1923, and it was chartered as a university in 1949. The present name was adopted in 1989. Shiho Ochi and Kōichi Tabo of Superfly are alumni. Wikipedia.

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Koshima H.,Matsuyama University | Takechi K.,Matsuyama University | Uchimoto H.,Matsuyama University | Shiro M.,Rigaku Corporation | Hashizume D.,RIKEN
Chemical Communications | Year: 2011

Platelike microcrystals of N-3,5-di-tert-butylsalicylidene-3-nitroaniline repeatedly bend and straighten upon alternate irradiation with UV and visible light. The mechanism of bending was elucidated by X-ray crystallographic analyses before and after photoirradiation. © 2011 The Royal Society of Chemistry.

Dan Y.,Matsuyama University
Proceedings - 11th IEEE/IPSJ International Symposium on Applications and the Internet, SAINT 2011 | Year: 2011

It is essential to consider the structure of information media in order to investigate the phenomena of information diffusion. As an example of continuous media, we consider on Euclidean spaces in the ordinary geometry. We also know information networks which have a variety of metric and structure in the space as another example of discrete media. In this work, we are faced the limit of mathematical analysis of nonlinear structure of information networks, then perform the Monte Carlo computer simulation using the proposed method. © 2011 IEEE.

Uesugi S.,Matsuyama University
Proceedings - 2011 International Conference on Advances in Social Networks Analysis and Mining, ASONAM 2011 | Year: 2011

A number of social networking services (SNSs) have become increasingly popular in recent years, as characterized by the growing number of their users and the deepening penetration of their services. As the number of users increases, the variety of user profiles, serving as a reflection of the real world, also increases. Psychological aspects must be taken into account to better understand the behaviors of SNS users. This study investigated the relationships between personality traits and SNS usage, and the results of a preliminary survey using the Big Five model of personality traits are reported herein. © 2011 IEEE.

Saijo R.,Matsuyama University | Kawase M.,Matsuyama University
Tetrahedron Letters | Year: 2012

In this report, we describe a new method for the synthesis of densely functionalized pyrroles. Reaction of mesoionic 1,3-oxazolium-5-olates with various S-ylides proceeds via nucleophilic addition followed by opening of the oxazole ring and subsequent cyclization to multisubstituted pyrroles bearing both a trifluoromethyl and alkyl(aryl)thio group at 3- and 4-positions. © 2012 Elsevier Ltd. All rights reserved.

Mizobuchi K.,Matsuyama University | Takeuchi K.,Kobe University
Energy Policy | Year: 2016

This study examined the influence of additional and replacement purchases of energy-efficient air-conditioners on power savings. We used a questionnaire survey and measured electricity use data from 339 Japanese households, collected from two city areas with different level of government-requested electricity-saving rates, namely, Osaka (10%) and Matsuyama (5%). The main findings of our study are as follows: (1) Households that purchased energy-efficient air-conditioners saved more electricity than those that did not. (2) "Additional-purchase households" showed significant energy savings, whereas "replacement households" did not. The rebound effect may negate the energy-saving effects of a new air-conditioner. (3) Altruistic attitude is associated with more active participation in power saving. (4) Households in Osaka saved more electricity than those in Matsuyama, probably because the government call to save electricity was more forceful. © 2016 Elsevier Ltd.

Carley H.,Matsuyama University
Communications in Computer and Information Science | Year: 2015

This paper discusses Internet Communication Technology (ICT) and in particular social networking in relationship to usage by senior citizens. Social networking as a percentage has been steadily increasing among all age groups including seniors. While the elderly may develop varying physical discrepancies such as auditory and optic complications these should not hinder their abilities to utilize social media devices. Not only does social networking allow for spontaneous intercommunication but for the elderly it can benefit overall wellbeing of the participants. Additionally, physical dexterity may be improved through continued use. It has been readily accepted that lifelong learning can lead to a decrease in mental decrepitude. The overall health benefits go beyond just communicating with grandchildren. Educational institutions and marketing establishments have yet to fully capitalize on the potential of senior social networking. © Springer-Verlag Berlin Heidelberg 2015.

Yoshimura M.,Matsuyama University
Yakugaku Zasshi | Year: 2014

Tannins and related polyphenols have been reported to produce diverse biological effects that indicate their therapeutic potential, including antioxidative, antibacterial, and antiviral activities. In an exploratory study of natural antioxidants with biological effects, we investigated the tannin constituents of myrtaceous plants reported to be rich in polyphenols. We isolated 16 new compounds from five species of the Melaleuca, Eucalyptus, Syzygium, Pimenta,and Myrtus genera. Among the new polyphenols, nine were isolated from Melaleuca squarrosa and characterized as C-gluco-sidic ellagitannin monomers and oligomers. The structures of the other new polyphenols from myrtaceous plants and a novel compound obtained from the berries of Pyracantha coccinea (Rosaceae) were also elucidated based on spectroscopic and chemical evidence. The antioxidative activity of isolates in the present study was estimated by measuring 1,1-diphenyl-2-picrylhydrazyl radical (DPPH)-scavenging activity and in the oxygen radical absorbance capacity (ORAC) test. We found that oenothein B, a macrocyclic ellagitannin dimer, is widely distributed in the genus Eucalyptus and produces a significant immunomodulatory effect on human dendritic cells (DCs). In a survey of natural ligands that bind to the aryl hydrocarbon receptor (AhR), nepitrin, a flavonoid glycoside, and other polyphenols were revealed to be promising therapeutic candidates. © 2014 The Pharmaceutical Society of Japan.

Saijo R.,Matsuyama University | Hagimoto Y.,Matsuyama University | Kawase M.,Matsuyama University
Organic Letters | Year: 2010

Mesoionic 4-trifluoroacetyl-1,3-oxazolium-5-olates (1), obtained from the reaction of N-acyl-N-alkylglycines with trifluoroacetic anhydride, react with phosphorus ylides to give β-trifluoromethylpyrroles (2) in good yields. The novel ring transformations of 1 into 2 occur via an initial attack of the ylide anions on the C-2 position of the ring. © 2010 American Chemical Society.

Mizobuchi K.,Matsuyama University | Takeuchi K.,Kobe University
Energy Policy | Year: 2013

This study examines the influences of financial and non-financial factors on electricity-conservation behaviour. A random sample of 236 Japanese households participated in the field experiment and the participants were offered two interventions, such as monetary rewards, depending on their reduction in electricity consumption and comparative feedback. The average saving rates of the (i) reward-intervention group (5.9%) and the (ii) reward with comparative feedback group (8.2%) are statistically larger than those of the (iii) control group (1.7%). Our study demonstrates the following. First, our econometric analysis confirmed a significant response by households to financial incentives but a more inconclusive response to the treatment that provided non-financial, additional information. Second, we found a positive influence of treatment externalities across time and households on energy saving. Third, there is a heterogeneous treatment effect in the reward-intervention group, with the households having a high New Ecological Paradigm (NEP) score being more likely to respond to the reward programme and save electricity than those that do not. Finally, and most interestingly, differences in responses to the questionnaire before and after the experiment suggest that the participants had underestimated the marginal costs of saving electricity before they actually started to do so. © 2013 Elsevier Ltd.

Yoshida T.,Matsuyama University | Amakura Y.,Matsuyama University | Yoshimura M.,Matsuyama University
International Journal of Molecular Sciences | Year: 2010

Plant tannins, including hydrolysable and condensed varieties, are well known antioxidants in medicinal plants, foods, and edible fruits. Their diverse biological properties and potential for disease prevention have been demonstrated by various in vitro and in vivo assays. A number of ellagitannins, the largest group of hydrolysable tannins, have been isolated from dicotyledoneous angiosperms and characterized. This diverse class of tannins is sub-grouped into simple ellagitannins, C-glycosidic ellagitannins, complex tannins (condensates of C-glycosidic tannins with flavan-3-ol), and oligomers up to pentamers. This review outlines and describes the chemotaxonomic significance of structural features in various types of ellagitannins found in plants belonging to the Myrtaceae, Onagraceae, and Melastomataceae families, which are all included in the order Myrtales. Any biological activities that have been reported, including antitumor and antibacterial effects as well as enzyme inhibition, are also reviewed. © 2010 by the authors; licensee Molecular Diversity Preservation International.

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