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Miyamoto N Wakahara T Sugisaki N Murata K Kanehisa H Fukunaga T Kawakami Y 《Journal of sports sciences》2010,28(14):1535-1542
The aim of the present study was to examine elbow joint extension power-load characteristics with and without a countermovement. Eight male participants performed maximal elbow extensions with and without a countermovement against different loads (0, 2.5, 5.0, 7.5, 10.0, 12.5, and 15.0 kg). Electromyographic activity of the lateral and long heads of the triceps brachii and the biceps brachii muscles was recorded. The average joint power in the concentric phase was significantly enhanced in the countermovement condition at all loads except for 0 kg. The optimal load for the maximal joint power was greater in the countermovement (7.5 kg) than in the no countermovement condition (5.0 kg). Electromyographic activity was unchanged over the intensities and conditions. Our results suggest that the optimal load for the maximal joint power depends on the type of action (i.e. with or without a counter-movement), and that the enhanced joint power in the countermovement condition is due primarily to the storage and utilization of elastic energy. 相似文献
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This paper describes a successful cross-training and reference librarian exchange experience involving two librarians at UCLA, one based at the Louise M. Darling Biomedical Library and the other based at the College Library, which primarily serves undergraduates. The experience has increased the reference skills and expertise of both librarians by introducing them to new sets of reference tools and databases, and has broadened their network of colleagues within the UCLA Library system. The participating libraries have also benefited from the exchange, and the program is expanding to include other UCLA libraries. 相似文献
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Differences between Japanese Infants and Caucasian American Infants in Behavioral and Cortisol Response to Inoculation 总被引：2，自引：0，他引：2
The behavioral and cortisol responses of Japanese infants and Caucasian American infants, 4 months of age, were observed during and following routine inoculation. The Caucasian American group showed a more intense initial affective response and a longer latency to quiet than the Japanese group; the Japanese group showed a greater cortisol response. A 4-group taxonomy was created based on high or low behavioral and cortisol response: high behavior–high cortisol, low behavior–low cortisol, high behavior–low cortisol, and low behavior–high cortisol. There were significant differences between the 2 groups of infants using this taxonomy: Infants in the Caucasian American group were more likely to fall in the high behavior–low cortisol group, while infants in the Japanese group were more likely to fall in the low behavior–high cortisol group. 相似文献
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The present study examined kanji errors in handwriting made by Japanese students and Australian learners of Japanese. First, a cognitive psychological model to explain the production of writing errors was proposed based upon the analysis of 374 writing errors of two-morpheme (kanji) compound words generated by Japanese students in spontaneous sentence writing situations. Despite the common assumption that kanji writing errors may not be related to the sounds of kanji characters (i.e., morphological phonology), the present study found that phonologically-related kanji writing errors were most numerous (60.0%), followed by orthographically-related errors (43.6%) and semantically-related errors (29.7%), including some overlap of these three types. Second, 408 kanji writing errors made by students learning Japanese in an Australian university were analyzed. Unlike the Japanese students, these subjects wrote more non-existing kanji and made orthographically-related mistakes rather than semantically- and phonologically-related errors. This result must be related to the level of kanji writing skills held by learners of Japanese. In light of these results, several suggestions were proposed for the methods of teaching kanji writing. 相似文献
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Gelatin-based microcapsule production using a microfluidic system and the feasibility of the resultant microcapsules for constructing spherical tissues surrounded by heterogeneous cells were studied. The first cell-encapsulation and subsequent cell-enclosing microparticle encapsulation were achieved using a microfluidic flow-focusing droplet production system. A hollow-core structure of about 150 μm in diameter was developed by incubating the resultant microparticles at 37 °C, which induced thermal melting of the enclosed unmodified gelatin microparticles. Mammalian cells filled the hollow-cores after 4 days of incubation. A cell layer on the cell-enclosing microcapsules was developed by simply suspending the microcapsules in medium containing adherent fibroblast cells. This method may prove useful for the generation of gelatin microcapsules using a microfluidic system for formation of artificial tissue constructs. 相似文献
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Four experiments are reported here to address the question of whether figurative and phonological processing based on sub-word components (radicals) interact in the recognition of Japanese kanji characters. A delayed matching task was used in which two briefly exposed source characters (e.g., ), each made up by two radicals, were followed by a probe character (e.g., ) which in critical conditions was different from the source characters. The task of the subject was to decide whether the probe was one of the two source characters. When a probe was figuratively similar to the source display, the homophonic relatedness between source and probe characters elicited more false responses to the probe. However, no homophony effect was found when the probe was dissimilar to the source display. Further, the false alarm rates in the homophone condition with figurative similarity was shown to be sensitive to proportion of homophonous trials in negative sets. The results suggest that phonological information of both whole character and of components was automatically activated despite experimental tasks in which subjects were given little incentive to execute phonetic processing. It is concluded that the interaction of figurative and phonological processing is due to mutual activation of the whole character and its radical(s) in the process of word identification in kanji. The results are considered within an interactive-activation framework with fore- and background activation device in multilevels. 相似文献
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[目的]新的大肠癌相关性抗原EID3的基因克隆及其诊断价值研究.[方法]利用大肠癌病人体内血清中所含的对肿瘤抗原产生的特异性抗体筛选睾丸组织cDNA噬菌体表达文库和大肠癌组织cDNA噬菌体表达文库(SEREX),并用RT-PCR技术研究EID3 mRNA在正常组织和大肠癌传代细胞表达.[结果]睾丸组织cDNA噬菌体表达文库筛选得到了可以诱导大肠癌病人抗体免疫应答的新抗原EID3基因(Gen-bank NM_001008394.1).它们定位于染色体19q13.2,EID3含1个外显子.通过RT-PCR分析发现,EID3基因在43例大肠癌传代细胞株中,39例阳性,阳性率为90.7%.在正常组织中,除睾丸组织外不表达或有极低水平转录.[结论]EID3 mRNA表达检测用于诊断大肠癌,可能具有高特异性和高敏感性的特点.EID3蛋白被首次发现在大肠癌病人中能够诱导机体的抗体免疫应答,为一个新的大肠癌相关性抗原分子.其功能可能与抑制细胞的恶性增殖相关,并可进一步研究其用于治疗和诊断大肠癌的可行性. 相似文献
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Native skilled, non-native skilled, and non-native non-skilled English readers read English texts and their reading times of words were measured. The results showed that reading times of native skilled readers were independent from the word length, word location, and grammatical word classification compared to non-native readers. Reading times of nouns strongly correlated with reading skill of readers. Although non-native skilled readers comprehended text meanings well, however the pattern of reading time of words was still different from those of native reader. 相似文献
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