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1.
Purpose: The purpose of this study was to investigate whether loads carried in a backpack, with a load mass ranging from 0 to 20?kg, causes respiratory muscle fatigue. Methods: Eight males performed four randomised load carriage (LC) trials comprising 60?min walking at 6.5?km?h?1 wearing a backpack of either 0 (LC0), 10 (LC10), 15 (LC15) or 20?kg (LC20). Inspiratory (PImax) and expiratory (PEmax) mouth pressures were assessed prior to and immediately following each trial. Pulmonary gas exchange, heart rate (HR), blood lactate and glucose concentration and perceptual responses were recorded during the first and final 60?s of each trial. Results: Group mean PImax and PEmax were unchanged following 60-min load carriage in all conditions (p?>?.05). There was an increase over time in pulmonary gas exchange, HR and perceptions of effort relative to baseline measures during each trial (p?p?>?.05). Conclusions: These findings indicate that sub-maximal walking with no load or carrying 10, 15 or 20?kg in a backpack for up to 60?min does not cause respiratory muscle fatigue despite causing an increase in physiological, metabolic and perceptual parameters. 相似文献
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Ecofeminism is a theory that combines women’s unfair condition with nature’s overuse by human.It "argues that a strong parallel exists between the oppression and subordination of women in families and society and the degradation of nature through the construction of differences into conceptual binaries and ideological hierarchies that allow a systematic justification of domination by subjects classed into higher-ranking categories over objects classed into lower-ranking categories" (Miao 184). Tar Baby is the fourth work of Tony Morrison which explores African-Americans’ poor status, especially black women’s. From ecofeminism’s perspective, women and nature share same destiny. Being fed up with the bad condition, women has struggling against male world and tried to win their own happiness and identity, appealing to mutual respect and understanding. 相似文献
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基于低碳环保理念,通过分析婴儿车在使用过程中容易忽略的噪声及粉尘问题,采用环保隔音材料,在车体底部安装除尘空调,以太阳能为动力除尘,设计“堡”贝太阳能式降噪除尘婴儿车,以期最大限度降低噪声及粉尘对婴儿的危害。 相似文献
4.
二十二碳六烯酸(Decosahexaenoic Acid,DHA)和二十碳四烯酸(Arachidonic Acid,AA)是婴儿生长发育极为重要的多不饱和脂肪酸.本文提取了安婴儿牌婴儿奶粉中的DHA和AA,采用气相色谱法,优化了色谱条件,在DB-WAX强极性柱上,采用程序升温:150℃(1min)10℃/min→240℃(14min),根据保留值规律定性,并选用分子结构相似碳原子数相等或接近的花生酸甲酯为标样,采用外标法[1,2]测定婴儿奶粉中的DHA和AA的含量.分析结果表明,安婴儿牌婴儿奶粉中每100g奶粉中含AA为173.45mg,DHA为73.75mg. 相似文献
5.
雷娟 《绵阳师范学院学报》2007,26(6):60-64
安妮宝贝是网络文学的最有代表性的人物,她的小说不仅体现了超文本性的文学写作的特点,而且以自己的独特的方式回应了大众文化的潮流。本文主要是对安妮宝贝的小说的女性视角的特异性作初步的探讨。其女性视角又是通过解构父系神话、解构母系神话、解构“姊妹情意”三个部分来构成反“菲勒斯中心主义”。对此问题的探讨,不仅有利于我们对网络小说有更深入的了解,而且对当下的女性主义文学研究也是不无启发意义的。 相似文献
6.
Abstract The aim of this study was to compare selected physiological variables and performance markers of soldiers from two “elite” units of the British Army. Ten soldiers from each of the two units were recruited for this study (n = 20). All participants completed three tests while carrying a 20 kg backpack load: (1) a maximal treadmill test using the Bruce protocol; (2) a 2 mile backpack run test specific to Unit A on a consistently flat tarmac road; and (3) a 29 km time-trial over hilly terrain typical of a mountainous area used by Unit B for performance assessment. Heart rate, maximal blood lactate concentration and performance (run time) were assessed during all three tests, with peak oxygen uptake also being measured during the maximal treadmill test. Measurements of anthropometry, isokinetic strength and mental toughness (MT48) were also recorded. There were no significant differences in terms of performance markers between the units (P > 0.05). Performance on the maximal treadmill test correlated with performance on the 2 mile backpack run test (r = ?0.57) and 29 km time-trial (r = ?0.66). Performance on the 2 mile backpack run test in turn correlated with 29 km time-trial performance (r = ?0.77), accounting for 59% of the variance. In conclusion, the maximal treadmill test and the 2 mile backpack run test are useful indicators of performance on the arduous hill march and could be employed in the screening and selection of potential recruits. 相似文献
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张丽娜 《安徽教育学院学报》2007,25(1):43-46
提单是国际海上货物运输中使用最广泛的一种文件。国际海上货物运输中提单的风险无处不在,比如提单在签发时,提单在流转时,提单在提货时都有可能存在风险。为了发挥提单在国际贸易中的作用,各方当事人应充分认识提单风险,提高防范意识,积极采取防范措施。 相似文献
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《Public Library Quarterly》2013,32(3):35-39
Abstract Figures recently released indicated that charitable giving in the United States was up more than 13 percent over the previous year. That is the good news. However, as the “baby boomers” approach retirement, what will be the future of fundraising and charitable giving in our country and for our libraries? Recent research is somewhat disquiet-ing-to say the least. The parents of baby boomers are more committed to giving. 相似文献
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安妮·宝贝长篇小说《春宴》堪称其转折性的作品。透过作者感性的文字叙述,对《春宴》中涉及到现代人的生存困境与精神危机进行反思与研究;对人类“精神生态”的拯救及重建进行归纳与总结;并对现代人关于精神家园的回归提出建设性意见。 相似文献
10.
刘曼 《温州大学学报(社会科学版)》2007,20(5):58-63
《窦娥冤》对悲剧文学的贡献是不可替代的,本文试图从民俗的视角,对悲剧进行解析。童养婚、接脚婚、高利贷、鬼魂信仰等习俗是构成窦娥悲剧命运的外部原因,深深扎根在窦娥心中的妇德"守节尽孝"的传统道德观念,最终把窦娥推向了毁灭。 相似文献