抗阻训练对机体代谢的影响     

周瑞霞 《山东体育科技》2011,33(4)

通过运用抗阻训练的原理,阐述说明其对人体代谢过程的独立积极作用：能有效改善身体成分;能优先减少内脏和腹部皮下脂肪,减少机体的脂肪组织,有效降低血糖、血脂的水平;在有代谢性危险人群,减少脂肪组织和提高控制血糖能力,抗阻训练具有重要的意义。  相似文献   

电子手工焊接工艺及质量控制     

杜江淮 《安徽职业技术学院学报》2011,10(3):17-20,23

在电子组装及科研、返工和返修中,特别是在产品以多品种和小批量为主的场合和家电维修中,手工焊接一直是不可缺少的操作手段。文章结合工程及教学实践分析了手工焊接的相关工艺要素、过程控制要点和手工焊接易产生的缺陷与原因,并提出了减少手工焊接缺陷的方法,有助于提高实际生产中手工焊接的质量和可靠性。  相似文献   

Diagnosis of Major Organic Acidurias in Children: Two Years Experience at a Tertiary Care Centre     

M. P. Narayanan  Vaidyanathan Kannan  K. P. Vinayan  D. M. Vasudevan 《Indian journal of clinical biochemistry : IJCB》2011,26(4):347-353

Organic acid disorders are inherited metabolic disorders in which organic acids accumulate in tissues and biological fluids of affected individuals. Classical organic acidurias include methylmalonic aciduria, propionic aciduria, isovaleric aciduria and maple syrup urine disease (MSUD). They are considered the most frequent metabolic disorders among severely ill children. Patients frequently present with acute symptoms early in life. 420 cases clinically suspected to have organic aciduria, with upper age limit of 12 years for a 2-year period (January 2007–December 2008) were enrolled into this study. Metabolic acidosis and neurological symptoms were the most common signs. Screening tests and thin layer chromatography were done for detection of organic acidurias. Identification and quantitation of organic acids in urine and quantification of amino acids in blood were done by high performance liquid chromatography. Out of 420 patients, 45 patients (10.7%) were found to have organic acidurias. 15 cases of methylmalonic aciduria, 16 cases of propionic aciduria, 13 cases of MSUD, and one case of isovaleric aciduria were diagnosed. Results demonstrate the importance of testing for organic acidurias. Since organic aciduria may cause irreversible brain damage if not treated, we recommend selective screening amongst severely ill children despite implied extra costs.  相似文献   

用数学方法研究铁器文物恒电流脱氯过程     

郭少文  欧阳维真 《中国科技信息》2011,(12):41-41

根据氯离子在外电场作用下同时发生电迁移和浓度扩散传质的特性,用数学模型研究铁器文物中氯离子存在形式以及在脱氯过程中的变化情况,为下一步深入研究提供理论依据和参考。  相似文献   

煤中各种形态硫的测定及相关问题探索研究     

石坚 《黑龙江科技信息》2011,(12):22-22

本文阐述了煤中各种形态硫测定中的原理及一些相关问题,着重讨论硫酸盐硫和硫化铁硫的测定。  相似文献   

计时类运动项目速度节奏的类型及应用   总被引：2，自引：1，他引：1  

郜卫峰 《体育科学》2011,31(5):91-97

速度节奏与计时类运动项目成绩密切相关。综述近期有关速度节奏的相关文献,将计时类比赛中常用的节奏类型分为6种:全冲节奏、快起节奏、慢起节奏、匀速节奏、抛物线型节奏和变换节奏,并从能量代谢的角度探讨了不同类型速度节奏的特点。研究表明,比赛时采取某种速度节奏的目的是为了最大限度地动用运动能源储备;运动性疲劳理论并不能圆满地解释运动中速度变化的原因,速度节奏的产生更可能是基于生理、心理、运动经验等因素的复杂联系,由运动员主观进行调节的结果。  相似文献   

便携式与固定式气体代谢仪测试效果的比较研究     

王欢  邱淑敏  江崇民  牟希涛  张彦峰  尚文元 《体育科学》2011,31(8)

目的:对Cortex MetaLyzer 3B与Cortex MetaMax 3B测试气体代谢和能量消耗数据进行对比,以期对便携式与固定式气体代谢仪测试效果之间的差别进行评价。方法:15名成年男性在跑台完成2次4.8 km/h、6.4 km/h、8.0 km/h 3个速度的走跑,使用CortexMetaLyzer 3B与Cortex MetaMax 3B分别测定其运动过程中的气体代谢指标并进行统计分析。结果:1)便携式仪器测试组的摄氧量、通气量均高于固定式仪器测试组数据,且走跑时摄氧量增加有非常显著的差异;2)安静状态下心率和能量消耗无差别,走跑时便携式测试组心率和能量消耗均高于固定式测试组;3)两组测试数据存在线性相关;4)使用ICC系数和Bland-Altman法统计分析表明,两组测试数据有非常显著的相关性和一致性。结论:1)便携式气体代谢仪(MetaMax 3B)与固定式气体代谢仪(MetaLyzer 3B)对于运动时摄氧量、CO2呼出量的检测结果有显著差异;2)应用直线回归分析为两仪器测量数据的转换提供简便的公式。但由于样本量较少,该转换关系还需要进一步增加样本量进行验证。  相似文献   

酞菁铁Ⅱ与牛血清白蛋白相互作用的光谱研究     

钟平  刘海东 《赣南师范学院学报》2014,(6):35-37

研究酞菁铁Ⅱ与牛血清白蛋白的相互作用,测定了二者相互作用的荧光光谱和紫外可见光谱.荧光光谱分析表明,随着酞菁铁Ⅱ浓度的增加,后者在345 nm处荧光有规律的发生猝灭现象.根据Stern-Vo Lmer方程可以计算得到两者相互作用的猝灭常数为1.25×104,结合位点数为1.由紫外可见光谱可知,随着酞菁铁Ⅱ浓度的增加,牛血清白蛋白在210 nm处吸光度有所上升,峰位发生红移.  相似文献   

无氧代谢指标在能量代谢评价中的应用综述     

刘芹 《安康学院学报》2014,(2):97-101

通过对衡量机体能量代谢的指标,特别是对机体无氧代谢过程中评价的指标进行综述,使人们对机体的能量代谢有一个总体的认识,从而为体育锻炼和全民健身中运动强度与运动项目的选择提供理论依据,为科学健身提供健康指导。  相似文献   

Effects of hypoxic exercise training on microRNA expression and lipid metabolism in obese rat livers     

Ying-li Lu  Wen Jing  Lian-shi Feng  Li Zhang  Jian-fang Xu  Tong-jian You  Jing Zhao 《Journal of Zhejiang University. Science. B》2014,15(9):820-829

To investigate the effects of hypoxic exercise training on microRNA (miRNA) expression and the role of miRNA expression in regulating lipid metabolism, 20 dietary-induced obese SD rats were divided into a normoxic sedentary group (N, n=10) and a hypoxic exercise training group (H, n=10). After four weeks, measurements were taken of body weight, body length, fat mass, serum lipid concentration, miRNAs differentially expressed in rat liver, and gene and protein expression levels of peroxisome proliferator activated receptor α (PPARα), fatty acid synthetase (FAS), and carnitine palmitoyl transferase 1A (CPT1A) in rat liver. Body weight, Lee’s index, fat mass, fat/weight ratio, and serum levels of total cholesterol (TC) and high density lipoprotein cholesterol (HDL-C) were all significantly lower in the H group than in the N group (P<0.01). Six miRNAs expressed significantly differently in the liver (P<0.05). Specifically, expression levels of miR-378b were significantly lower in the H group than in the N group (P<0.05). Compared with the normoxic sedentary group, hypoxic exercise training resulted in a lower ratio of FAS mRNA to CPT1A mRNA (P<0.05), as well as lower CPT1A protein levels (P<0.01), while a higher ratio of FAS to CPT1A protein levels (P<0.01) was observed. In conclusion, hypoxic training may elevate the resistance of high fat diet induced obesity in rats by reducing the expression of miR-378b, and decrease the fatty acid mitochondrial oxidation in obese rat livers by decreasing the protein expression of CPT1A and increasing the protein expression ratio of FAS/CPT1A.  相似文献