论《铸剑》和《鲜血梅花》中复仇者形象     

周思辉 《齐齐哈尔师范高等专科学校学报》2014,(4):77-79

鲁迅的小说作品《铸剑》和余华的小说作品《鲜血梅花》都是讲述＂血亲复仇＂的故事。两者所塑造出来的复仇者形象在血亲复仇模式、复仇者角色的定位、复仇启蒙者的作用等方面具有很强的同质性,但作为当代作家的余华,在继承鲁迅创作思想的同时,也有创新和发展,《鲜血梅花》中的复仇者形象更加虚无。两个形象表现出的不同的内涵特质,背后隐藏的是创作主体的独特生命体验、不同的时代背景及地域文化环境。  相似文献   

方向自悟暴露--探寻初中科学高效教学策略     

骆善民 《科教文汇》2014,(5):193-194

在我们的教育教学工作过程中如何协调好教与学的双边关系,提高课堂教学的效率,这是我们永恒的主题。本文就学习目标如何表述和展示,如何用情景材料教学,帮助学生领悟,如何将学生的学习问题暴露再教学,作了一些探讨。  相似文献   

运动减肥对肥胖儿童少年红细胞膜磷脂酰丝氨酸外翻及ATPase酶活性的影响   总被引：1，自引：0，他引：1  

赖爱萍  陈文鹤 《中国体育科技》2011,47(5)

目的:探讨肥胖儿童少年红细胞膜PS外翻水平和ATP酶活性及运动减肥干预对其的影响.方法:对64名肥胖儿童少年(按体脂百分比分为轻、中和重度肥胖组共3组)进行4周有氧运动减肥,采用流式细胞术测定红细胞膜PS外翻,干预前后进行血脂、PS外翻及Na K+ - ATPase和Ca2+ Mg2+- ATPase酶活性的测定.结果:运动干预前轻度肥胖组PS外翻与其他2组肥胖者之间存在显著性差异(P≤0.05),HDL仅在轻度组和重度组之间存在显著性差异;运动干预后Na+ K+ -ATPase活性显著增加(P≤0.05),CE2+ Mg2+- ATPase活性虽有增加,但未呈显著性水平;运动干预后PS外翻虽然有所下降,但无显著性差异.结论:脂代谢紊乱的初期,膜PS外翻可能比血脂指标更能体现肥胖的发展.有氧运动减肥能显著增加红细胞膜Na+ K+ - ATPase活性,改善红细胞膜PS外翻水平,但后者对运动干预的效应滞后于血脂变化.  相似文献   

模拟海拔4800m急性低氧运动对肌氧饱和度的影响   总被引：2，自引：0，他引：2  

马国东  罗冬梅  徐飞  胡扬  姚天聪  鲍丹  赵星  李岳 《北京体育大学学报》2011,34(1):54-57

目的:观察急性低氧运动对肌氧饱和度的影响,探讨肌氧饱和度与脉搏血氧饱和度(Pulse Oxy-gen Saturation,SpO2)相关关系。方法:以42名健康男性大学生为实验对象,采用无损伤的近红外光谱技术(near infrared spectroscopy,NIRS)监测常氧、急性低氧暴露6 h期间肌氧饱和度,同时检测SpO2。结果:肌氧饱和度运动开始后显著下降,急性低氧运动下降幅度加大;肌氧饱和度和SpO2呈正相关(r=0.949,P<0.01)。结论:肌氧饱和度相对有效下降值(Deff)反应运动中组织动员和利用氧气情况,可评定人体运动过程中肌肉氧化代谢能力;低氧运动时肌氧饱和度随血氧饱和度的下降而降低;肌氧饱和度有望成为低氧训练适应能力的简单无创预测指标。  相似文献   

高原或低氧环境下脱水与补液的研究进展     

郭红 《中国体育科技》2006,42(5):74-77

高原或低氧环境下体液平衡的改变主要表现为脱水和尿钠排泄。这与低氧刺激下交感神经兴奋性提高,外周化学感受器激发肾脏反应及体液调节激素的改变有关。低氧刺激使机体对营养素和液体的要求提高,但摄入降低,因此,机体应当补充足够的营养素和富含碳水化合物及电解质的液体。综述了高原或低氧环境下机体的体液平衡改变及其机制,提出了低氧下补液的主要原则,并指出了亟待研究的主要问题。  相似文献   

The Language Environment of Toddlers in Center-based Care versus Home Settings     

Ann D. Murray  Bronwyn S. Fees  Linda K. Crowe  Molly E. Murphy  Amanda L. Henriksen 《Early Childhood Education Journal》2006,34(3):233-239

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Study on the neurotoxic effects of low-level lead exposure in rats   总被引：10，自引：0，他引：10  

Zhu ZW  Yang RL  Dong GJ  Zhao ZY 《Journal of Zhejiang University. Science. B》2005,6(7):686-692

Objective: To investigate effects of developmental lead exposure on nitric oxide synthase (NOS) activity in different brain regions and on N-methyl-D-aspartate (NMDA) receptor mRNA expression in the hippocampus of rats. On the basis of these observations, we explored possible mechanisms by which lead exposure leads to impaired learning and memorizing abilities in children. Methods: A series of rat animal models exposed to low levels of lead during the developing period was established (drinking water containing 0.025%, 0.05% and 0.075% lead acetate). NOS activities in the hippocampus, the cerebral cortex, the cerebellum and the brain stem were determined with fluorescence measurement and levels of mRNA expression of the NMDA receptor 2A (NR2A) subunit and NMDA receptor 2B (NR2B) subunit in the rat hippocampus were measured with Retro-translation (RT-PCR). Results: There were no differences in the body weight of rat pups between any of the groups at any given time (P>0.05). The blood lead level of Pb-exposed rat pups showed a systematic pattern of change: at 14 d of age, it was lower than that at 7 d of age, then rising to the peak level at 21 d and finally falling to lower levels at 28 d. The hippocampal NOS activities of lead-exposed groups were all lower than that of the control group on the 21st and 28th day (P<0.01). NOS activities in the cerebellum of lead-exposed groups were all lower than that of the control group on the 21st and 28th day (P<0.001) and the NOS activity of the 0.025% group was significantly lower than that of the 0.05% and 0.075% groups on the 28th day (P<0.05). NOS activity in the cerebral cortex of the 0.075% group was significantly lower than that of the control, 0.025% and 0.05% groups on the four day spans (P<0.001). There was no significant difference of NOS activity in the brain stem between any lead-exposed group and the control group on the four day spans. In the 0.05% and the 0.075% groups, the level of NR2A mRNA expression was higher than that in the control group at 7 d and 14 d of age (P<0.05). In the 0.025% group, the level of NR2A was found to be higher than that in the control group at 7 d of age only (P<0.05). No significant differences were found for the levels of NR2B mRNA expression between any of the groups at any given time. Conclusions: NOS activity in the hippocampus, the cerebral cortex and the cerebellum are inhibited by lead exposure. The degree of the inhibitory effect depends on the time span of exposure and the lead concentration. Developmental low-level lead exposure was found to raise the level of NR2A mRNA expression in the hippocampus of rats. Developmental low-level lead exposure does not affect the level of NR2B mRNA expression in the hippocampus.  相似文献   

低氧暴露对运动性血红蛋白低下游泳运动员红细胞参数和EPO变化的影响     

陈福刁  陈浩庆  王翔 《韩山师范学院学报》2007,28(6):67-72

运动性低血红蛋白引起红细胞运输氧和二氧化碳的能力及物质代谢能力下降,影响运动能力。实验研究了低氧暴露条件下运动性低血红蛋白游泳运动员的红细胞参数和促红细胞生成素(EPO)的变化情况,探讨低氧防治运动性血红蛋白低下的效果。  相似文献   

丈夫：在城市底层敞开的身份——解读沈从文的《丈夫》     

田级会  谭必友 《黄冈师范学院学报》2008,28(4):92-95

沈从文《丈夫》是一篇凄美精致的短篇小说。作品讲述了一个乡下青年丈夫到县城看望以做妓女为谋生手段的妻子的故事。这个青年丈夫在目睹妻子的接客生活后,逐渐触动了对自己身份的再认识,终于彻底放弃了以前的幻想,夫妻俩重新回到自己的乡下家里。沈从文描写了一个有关丈夫身份澄明的非常特殊的历史故事。  相似文献   

Social inequalities in early childhood competences,and the relative role of social and emotional versus cognitive skills in predicting adult outcomes     

Ingrid Schoon  Bilal Nasim  Rose Cook 《British Educational Research Journal》2021,47(5):1259-1280

This study draws on the nationally representative British Birth Cohort Study (BCS70) to examine (1) the association between social background and early socio-emotional and cognitive competences at age 5 and (2) the relative and independent contributions of early socio-emotional and cognitive competences to educational and socio-economic attainment in adulthood. A multi-dimensional (multiple exposure, multiple outcome) approach is adopted in conceptualising social background, childhood competences and adult outcomes by age 42. Indicators of social background include parental education, social class, employment status, family income, as well as home ownership, enabling us to test which aspects of socio-economic risk uniquely influence the development of early competences. Indicators of childhood competences include directly assessed cognitive competences (i.e. verbal and visual motor skills), while measures of socio-emotional competences include hyperactivity, good conduct, emotional health and social skills, reported by the child’s mother at age 5. Adult outcomes include highest qualifications, social class and household income by age 42. The findings suggest that multiple indicators of social background are associated with both socio-emotional and cognitive competences, although the associations with socio-emotional competences are less strong than those with cognitive competences. We find significant long-term predictive effects of early cognitive skills on adult outcomes, but also independent effects of socio-emotional competences, in particular self-regulation, over and above the role of family background. The study supports calls for early interventions aiming to reduce family socio-economic risk exposure and supporting the development of cognitive skills and self-regulation (i.e. reducing hyperactivity and conduct problems).  相似文献