Nagatomo F.,Kyoto University |
Fujino H.,Kobe University |
Kondo H.,Nagoya Womens University |
Ishihara A.,Kyoto University
Oxidative Medicine and Cellular Longevity | Year: 2012
Introduction. We determined derivatives of reactive oxygen metabolites (dROMs) as an index of oxidative stress level (oxidant capacity) and biochemical antioxidant potential (BAP) as an index of antioxidant capacity in rats exposed to different oxygen concentrations. Methods. Male Wistar rats were exposed to 14.4, 20.9, 35.5, 39.8, 62.5, and 82.2 oxygen at 1 atmosphere absolute for 24 h. Serum levels of dROMs and BAP were examined by using a free radical and antioxidant potential determination device. The morphological characteristics of red blood cells were examined by phase contrast microscopy. Results. There were no differences in the levels of dROMs in rats exposed to 14.4, 20.9, and 35.5 oxygen. However, the levels of dROMs increased in the rats exposed to 39.8 and 62.5 oxygen. The levels of dROMs were the highest in the rats exposed to 82.2 oxygen. There were no differences in the levels of BAP with respect to the oxygen concentration. Morphological changes in the red blood cells induced by oxidative attack from reactive oxygen species were observed in the rats exposed to 39.8, 62.5, and 82.2 oxygen. Conclusion. Our results suggest that exposure to oxygen concentrations higher than 40 for 24 h induces excessive levels of oxidative stress in rats. © 2012 Fumiko Nagatomo et al.
Jarrell D.,Nagoya Womens University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014
With increasing permeation of mobile devices into people's everyday life, m-learning can be regarded as the next generation of e-learning. Learning via mobile devices, especially mobile phones, is practiced in educational areas all over the world. This paper describes a mobile language learning project which creates English learning materials and delivers the learning materials to Japanese university students. The data collected from this ongoing mobile language learning project allows us to investigate Japanese students' mobile learning styles and learning material preferences as well as their concerns about using mobile learning. The data was collected from various sources: online surveys, server logs, user registered personal information, interviews and actual online quiz results. The findings obtained from this research provide useful information for future mobile learning project/system design, implementation and content delivery. © 2014 Springer International Publishing.
Furuzawa M.,Asahi University |
Chen H.,Gifu University |
Fujiwara S.,Asahi University |
Yamada K.,Nagoya Womens University |
Kubo K.-Y.,Seijoh University
Experimental Gerontology | Year: 2014
Chronic mild stress is a risk factor for osteoporosis and chewing inhibits the stress response. We examined the effect of chewing on chronic stress-induced bone loss and bone microstructural deterioration in mice. The senescence-accelerated mouse strain P8 (SAMP8) was randomly divided into control, stress, and stress with chewing groups of fifteen animals each. Mice in the stress and stress with chewing groups were placed in a ventilated restraint tube for 60. minutes, twice a day for 4. weeks. The restrained mice were simultaneously subjected daily to one of the following stressors: water immersion, physical shaking and flashing lights. Mice in the stress with chewing group were allowed to chew a wooden stick during the experimental period. After the experiment, the bone response was evaluated using quantitative micro computed tomography, bone histomorphometry, and biochemical markers. Exposure of SAMP8 mice to chronic stress resulted in significant increase of the blood corticosterone and noradrenaline levels, and adrenal weight. The bone resorption was activated and the bone formation was suppressed. Trabecular bone volume and trabecular number were decreased in both the vertebra and distal femur of the stress group. Chewing under chronic stress prevented the increase in the blood corticosterone and noradrenaline levels, attenuated the reduced bone formation and increased bone resorption, improved the trabecular bone loss and bone microstructural deterioration induced by chronic mild stress. These findings indicate that chewing can ameliorate chronic stress-induced bone loss in SAMP8 mice. Thus, chewing may represent a useful method preventing and/or treating chronic stress-related osteoporosis. © 2014 Elsevier Inc.
Mindog E.,Nagoya Womens University
JALT CALL Journal | Year: 2016
This study explores, describes and analyzes the utilization of smartphone apps by four Japanese university students to support learning English as a Foreign Language (efl). Findings indicate that intermediate language learners use apps to access content and communicate on sns and are not keen on studying discrete language parts. Participants believe that using apps helped them with their four language skills (listening, reading, speaking, and writing), grammar, vocabulary and spelling. Use of apps (location, frequency and duration) seems to be determined by opportunity, personal preference and desire to use. © 2016 jalt call sig.
Oda K.,Nagoya Womens University
Journal of the Japan Research Association for Textile End-Uses | Year: 2014
An original KAKISHIBTJ-KAMIKO (Outerwear made of Japanese paper to which persimmon tannin has been applied) was developed by selecting a type of persimmon tannin suitable for producing KAKISHIBTJ-KAMIKO as a clothing material. This development was based on the results of a study of the extraction and application of KAKISHIBU (persimmon tannin) and the work of present-day textile-dyeing artists. Eighteen prototype samples were produced by using different tannin application processes and drying processes. The samples of prototype were then compared. In this way the most appropriate production process was developed. A stretch test of the KAKISHIBTJ-KAMIKO that was produced showed that the paper had stretch properties similar to those of fabric and could be used as a clothing material. Comparison of measurement data for non-tannin-applied WASHI (Japanese paper) and KAKISHIBTJ-KAMIKO showed that tannin application improved the strength of WASHI and gave the paper water resistance. In dress production the paper showed potential for the use of designs with creative silhouettes. Details that utilize the characteristics of the tannin-applied WASHI can be incorporated: for example, silhouettes can be created on the basis of the materials' hardness, as indicated by its bending resilience. Dress production methods can utilize the increased strength supplied by the tannin application, which is considered unsuitable for fabric.