Anthropometric fractionation of body mass: Matiegka revisited     

E. Cattrysse  E. Zinzen  D. Caboor  W. Duquet  P. Van Roy  J.P. Clarys 《Journal of sports sciences》2013,31(9):717-723

In a group of 699 Belgian nursing professionals, we estimated body composition using the four-component anthropometric model, relying on the equations originally formulated by Matiegka in 1921 and later revised by Drinkwater and colleagues. We estimated muscle mass using the more recent formula proposed by Martin and co-workers. A discrepancy was noted between estimated total body mass and 'assessed' mass, suggesting erroneous estimations of the components.  相似文献   

Editorial     

Ron Maughan 《Journal of sports sciences》2013,31(9):663-664

The aims of this study were to assess the validity and reliability of body volume and percent body fat determined by sulphur hexafluoride dilution, using underwater weighing as the criterion method, and to determine the influence of the magnitude of body volume. Thirty-one healthy Japanese individuals aged 18-27 years (16 males: height 1.70 - 0.06 m, mass 64.8 - 7.7 kg; 15 females: height 1.60 - 0.05 m, mass 55.2 - 6.2 kg; mean - s) participated in the study. Sulphur hexafluoride dilution measures the concentration of sulphur hexafluoride gas in the chamber (BSF-200, Shimazu Corp.). Underwater weighing was performed five times using a weight scale (AD-6204, A&;D) after residual volume had been determined (System9, Minato Medical Corp.). There were no significant differences in the mean between two trials for body volume, body density or percent body fat determined by sulphur hexafluoride dilution. The intra-class correlation coefficient of these variables ranged from 0.985 to 0.999. The results suggest that sulphur hexafluoride dilution is a reliable method for assessing body composition. There was no significant difference in body volume or percent body fat between sulphur hexafluoride dilution (males: 61.3 - 7.6 litres, 18.4 - 6.7%; females: 52.8 - 6.9 litres, 21.0 - 8.9%) and underwater weighing (males: 60.6 - 7.0 litres, 15.6 - 3.5%; females: 53.0 - 6.5 litres, 23.7 - 6.1%) and there was a high correlation between the two ( r = 0.997, P ? 0.05). A Bland-Altman plot of the difference between percent body fat estimated by underwater weighing and sulphur hexafluoride dilution versus average percent body fat by the two methods showed no systematic difference (mean difference =- 0.12 - 6.6 kg). The upper and lower limits of agreement were 13.2% and-13.4%, respectively. Determination by sulphur hexafluoride dilution resulted in both over- and underestimations in body volume and the difference between the two body volumes (determined by underwater weighing and by sulphur hexafluoride dilution) was inversely proportional to the mean body volume by the two methods. This suggests that improvements need to be made to the device or to the technique to maintain a constant volume of sulphur hexafluoride in the chamber.  相似文献   

词调声情小议     

曾晓洪 《四川职业技术学院学报》2012,22(4):34-36

填词要依据词调声情是一种传统说法,但这种说法只是后人在无法真正做到依音乐填词时,所总结提出的一套维护词"别是一家"的技术手段,它在很大程度上与两宋词的创作实际并不相符,填词不顾声情的现象大量存在。影响填词不依声情的各种因素有当时音乐记录传播手段不科学、作家的个性、气质、遭际、心境及所处时地、环境等。  相似文献   

作文德育功能的几点启示     

徐金凤 《成都教育学院学报》2009,23(8):123-125

作文是心灵的写照,是认识的再现,是感知的流露。作文教学的过程是一个教一学—做的统一过程,是一个知、情、意、行的渐进过程,是一个真、善、美的完善过程。因此,作文教学对德育教育具有较强的支撑作用,教师应该充分发挥作文的诸多作用,以自己的感化力使受教育者体验到应有情感,并通过情感的感染性和迁移性功能,激发情感反应,促进其健康成长,成为一定教育目标下的适应社会需要的有用之人。  相似文献   

“计算机组成原理”课程教学方法研究     

鄢吉多 《贵阳金筑大学学报》2010,(3):68-70

通过对“计算机组成原理”课程特点以及在教学中存在的问题进行分析,根据教学目标及要求,从培养学生学习兴趣,提高教学效果和教学效率为出发点,对其教学方法进行研究,提出了四种教学方法,并将其在教学过程中应用,结果表明：教师与学生之间的互动性得到了加强,学生学习兴趣和学习主动性得到提高,从而提高了教学效果和教学效率。  相似文献   

Non-destructive comparative analysis by X-ray fluorescence of Asian and European seventeenth- to nineteenth-century glass     

Florian Knothe  Robert H. Brill 《文物保护研究》2014,59(5):S66-S69

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国际安全的新领域:环境安全   总被引：3，自引：0，他引：3  

刘东国 《教学与研究》2002,28(10):49-54

自 2 0世纪 70年代后期环境安全概念提出之后 ,受到联合国相关组织和各国政府的普遍重视 ,正成为新的国际安全合作领域。环境安全与传统安全观念有很大的不同 ,因而必须从新的角度重新构筑国际安全秩序。而安全的非军事化 ,或者说用综合安全弥补军事安全的不足是不可避免的趋势。  相似文献   

柱色层族组成分离方法对黄芪中脂肪酸和脂肪酸酯的研究     

王桂良  李生英  陈明凯 《甘肃高师学报》2007,12(5):42-45

黄采用柱色层族组成分离方法和气相色谱-质谱-计算机联用技术分离和鉴定.从甘肃岷县黄芪中分析鉴定出48种脂肪酸酯、29种脂肪酸、5种芳香酸,其中不饱和脂肪酸占全部脂肪酸的55.50%,亚油酸的含量达41.33%,亚麻酸含量为10.59%,为岷县黄芪的进一步开发应用提供了基础数据.  相似文献   

也说“观察与作文”     

陈冬生 《中国教育发展研究杂志》2007,4(1):128-129

生活是写作的源头，初中作文指导重在观察生活。教师要培养学生认真仔细地观察生活，通过创设情境，指导学生按一定顺序、全面、细致、反复地进行观察。同时要养成热爱生活、积累生活的习惯，保持观察生活的自觉性，才能使写作不再是负担，而是雀享受成功与快乐。  相似文献   

中学作文教学本质浅论     

滕树科  张绍克 《贵州教育学院学报》2006,22(3):88-91

中学作文教学的内在本质应该是把文章写作的基本知识传授给学生,教他们学会常见基本文体的写作。因此,真正科学的教学,就应该是以教学生学会基本文体里各种常见子文体的写作,把文章写作的其它知识穿插在其中来展开。  相似文献