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Two strains of rats (albino Wistar and hooded PVG/c) were exposed to a conditioned defensive burying paradigm that consisted of placing rats in a test chamber with bedding material on the floor, shocking them with a shock prod, and recording the time each rat spent in burying responses toward the prod. Various behaviors other than burying (freezing, grooming/paw licking) were observed by a time-sampling procedure during the control, conditioning, and extinction sessions, each of which was 15 min in duration. Wistar rats generally showed behavioral inhibition, as evidenced by less burying, lower exploratory and ambulatory behavior, and higher freezing behavior. PVG/c rats spent significantly more time engaged in burying and accumulated more bedding material in the conditioning session than did the Wistar rats. No significant differences between the two strains of rats were observed during the extinction session in terms of these measurements. The results indicate that Wistar rats have a greater tendency to freeze when coping with the noxious stimulus in a conditioned defensive burying paradigm, whereas the dominant coping style for PVG/c rats is defensive burying. 相似文献
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This paper explores the determinants of R&D cooperation in Japanese start-ups. Using a sample from an original survey conducted in 2008, we examine the effects of founder-, firm-, and industry-specific characteristics on R&D cooperation by type of partners. Our findings indicate that founder-specific characteristics such as educational background, prior innovation output, and affiliation to academic associations are fairly important in determining R&D cooperation with academic institutes (universities and public research institutes). We also provide evidence that founders’ prior innovation output and work experience have positive and significant effects on R&D cooperation with business partners. With respect to firm-specific characteristics, it is found that firms investing more in R&D tend to engage in R&D cooperation, regardless of the type of partners. Furthermore, it is found that independent firms are less likely to cooperate in R&D with academic institutes than subsidiaries and affiliated firms. 相似文献
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光谱分析法在食品评价中的应用 总被引：1，自引：1，他引：0
介绍光谱分析法对食品质量进行评价的方法。对其基本原理进行阐述和讨论,并与传统方法进行对比。说明食品的颜色、光谱学特性与食品品质变化的密切关系。通过食用肉色素蛋白质——肌红蛋白诱导体形态随食肉新鲜度变化的相关性、对固体肉样反射光谱影响关系的解析,论证该方法在食肉新鲜度检测中的可行性。 相似文献
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Tomoya Takabayashi Mutsuaki Edama Masatoshi Nakamura Emi Nakamura Takuma Inai Masayoshi Kubo 《European Journal of Sport Science》2017,17(10):1289-1296
Females, as compared with males, have a higher proportion of injuries in the foot region. However, the reason for this gender difference regarding foot injuries remains unclear. This study aimed to investigate gender differences associated with rearfoot, midfoot, and forefoot kinematics during running. Twelve healthy males and 12 females ran on a treadmill. The running speed was set to speed which changes from walking to running. Three-dimensional kinematics of rearfoot, midfoot, and forefoot were collected and compared between males and females. Furthermore, spatiotemporal parameters (speed, cadence, and step length) were measured. In the rearfoot angle, females showed a significantly greater peak value of plantarflexion and range of motion in the sagittal plane as compared with males (effect size (ES)?=?1.55 and ES?=?1.12, respectively). In the midfoot angle, females showed a significantly greater peak value of dorsiflexion and range of motion in the sagittal plane as compared with males (ES?=?1.49 and ES?=?1.71, respectively). The forefoot peak angles and ranges of motion were not significantly different between the genders in all three planes. A previous study suggested that a gender-related difference in excessive motions of the lower extremities during running has been suggested as a contributing factor to running injuries. Therefore, the present investigation may provide insight into the reason for the high incidence of foot injuries in females. 相似文献
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Noriaki Ichihashi Hiroki Umegaki Tome Ikezoe Masatoshi Nakamura Satoru Nishishita Kosuke Fujita 《Journal of sports sciences》2016,34(23):2155-2159
The aims of this study were to investigate the effects of a 4-week intervention of static stretching (SS) on muscle hardness of the semitendinosus (ST), semimembranosus (SM) and biceps femoris (BF) muscles. Shear elastic modulus was measured by using ultrasound shear wave elastography as the index of muscle hardness. Thirty healthy men (age 22.7 ± 2.2 years) volunteered for this study and were randomly assigned to the SS intervention group (n = 15) or the control group (n = 15). Participants in the SS intervention group received a 4-week stretch intervention for the hamstrings of their dominant leg. Shear elastic moduli of the hamstrings were measured at initial evaluation and after 4 weeks in both groups at a determined angle. In all muscles, the shear elastic modulus decreased significantly after SS intervention. The percentage change in the shear elastic modulus from the value at initial evaluation to after 4 weeks intervention was greatest in the SM. These results suggest that SS intervention has chronic effects on reducing hardness of the hamstring muscle components, especially the SM muscle. 相似文献
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Quamrul?HasanEmail author Marcelo?Machado Masatoshi?Tsukamoto Katsuhiro?Umemoto 《知识管理研究与实践》2006,4(2):162-169
In the last decade, there has been increasing pressure on academic laboratories to produce practical results. The last 10 years also have seen a growing interest in knowledge management, a management discipline believed to enhance organizations’ innovative capability by the sharing and creation of knowledge. While most knowledge management cases refer to the business setting, we believe that the introduction of these practices can also enhance knowledge creation and knowledge sharing within and among research units. This paper focuses on a pilot study being conducted at a Japanese public graduate university – JAIST – under a Center of Excellence (COE) program that was established to bring the performance of research laboratories up to a world class level in productivity by applying the theories and tools of knowledge science. This study is a cooperative effort between the School of Knowledge Science, doing research on knowledge management and systems, and two research laboratories in the School of Materials Science, doing basic and applied research on materials science. The goal of this project is to enhance materials science students’ capabilities so that they become successful creators of new scientific knowledge. A group of seven graduate research students volunteered for the study. As one of the first steps, we introduced a formal and periodic written reporting system that motivates students to think strategically about their experiments, helps them to improve their communications skills, and enables students to self-evaluate their skills and supervisors to evaluate the students’ skills as well as monitor their progress and developments in a formalized way. Since the project is relatively new, these preliminary results are associated with a generalized awareness and participation of the students in the project. However, we are expecting to obtain more concrete results, that is, quantifiable improvements in scientific production, in the near future. 相似文献
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How are new university educational programs established in response to expanding sciences and how do they promote university-industry (UI) joint research? To study these questions in relation to life sciences and biotechnology, we first compiled the data on the establishment of new undergraduate and graduate programs on these fields in Japanese universities since the 1950s. We then analyzed statistically whether and how such establishment contributed to the occurrence and frequency of UI joint research in biotechnology. We found that the expansion of such university programs in fact contributed to the promotion of UI joint research. We also confirmed that, even with this contribution controlled, UI joint research projects increased following the 1998 legislation to promote technology transfer from universities (the so-called TLO Act) and the 1999 legislation to allow universities to retain rights on their inventions made with government research funds (the so-called Japanese Bayh-Dole Act). 相似文献
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