香港与近代中国革命     

刘毅政 《内蒙古师范大学学报(哲学社会科学版)》1997,(3)

在举国迎接香港回归祖国之际，追溯香港百年沧桑的历史，阐明香港人民在鸦片战争、太平天国、辛亥革命的近代中国重大历史事件中，香港与内地同胞，同呼吸、共命运，荣辱与共，相互支援，反对封建压迫，反抗外国侵略的斗争，深刻地反映了香港与祖国两地同胞的血肉联系和亲情关系。  相似文献   

多裂隙技术在兔动脉力学性质研究中的应用     

虞启琏  王小泉  齐力  谢小锐 《天津大学学报(英文版)》1995,(1)

由于血管的各向异性性质，血管三维形变的测量在血管力学性质研究中占有重要地位。本文运用一种非接触性的光学测量技术来测量离体或在体血管的三维形变，并给出了血管表面三维坐标重建的处理方法。用半径已知的细圆柱棒实验验证此技术的精度为±１０μｍ。文中给出此技术用于兔胸主动脉弹性面积压缩性质研究的结果，表明此方法在血管力学性质研究中有广泛的应用前景。  相似文献   

论村治模式   总被引：10，自引：0，他引：10  

贺雪峰 《江西师范大学学报(哲学社会科学版)》2005,38(2):3-8

以农民行动单位作为关键变量来构造不同的村治模式,不仅有以江西、福建宗族农村为代表的大规模行动群体的村治模式,还有以湖北荆门农村为代表的以农户为主要行动单位的家户型的原子化状况的村治模式。从我们已有的调查经验来看,在安徽阜阳,以兄弟、堂兄弟强有力关系为基础的小亲族群体,构成了阜阳农村村治的显特征,可以称作阜阳村治模式。与阜阳农村以小亲族为主要行动单位有所差异的,是陕西关中农村以户族为主要行动单位的村治模式,这种模式,可以称作关中村治模式。  相似文献   

Study of androgen and atherosclerosis in old-age male     

Yang Yun-mei  Lv Xue-ying  Huang Wei-dong  Xu Zhe-rong  Wu Ling-jiao 《浙江大学学报(A卷英文版)》2005,6(9):931-935

Objective: To observe the difference of androgen and inflammatory cytokines level in atherosclerosis and analyse their relations. Method: Both carotid arteries and arteries of lower extremity were subjected to ultrasonic examination by Doppler's method. Those with much atheromatous plaque formation were ranged into case group, and those with normal result formed control group. Total, free testosterone and estradiol were assayed by radioimmunoassay. C reactive protein (CRP) was assayed by nepheloturbidity. Tumor necrosis factor-α (TNF-α), Interleukin-6 (IL-6), Interleukin-8 (IL-8), Interleukin-10 (IL-10), Interleukin-18 (IL-18), soluble intercellular adhesion molecule-1 (sICAM-1) and soluble vascular cell adhesion molecule-1 (sVCAM-1) were assayed by ELISA. The mean difference between two groups and the correlation between free testosterone and cytokines were analysed. Results: Free testosterone was (6.337±3.371) pg/L in case group and (11.375±4.733) pg/L in control group,P<0.01. No differences were found in total testosterone and estradiol. CRP was (27.294±10.238) mg/L in case group and (12.843±6.318) mg/L in control group,P<0.01. IL-6 was (41.700±31.385) pg/L in case group and (25.396±20.772) pg/L in control group,P<0.05. IL-8 was (89.249±58.357) pg/L in case group and (67.873±31.227) pg/L in control group,P<0.05. sICAM-1 was (470.491±134.078) pg/L in case group and (368.487±97.183) pg/L in control group,P<0.01.sVCAM-1 was (537.808±213.172) pg/L in case group and (457.275±157.273) pg/L in control group,P<0.05. There were no differences in TNF-α, IL-10 and IL-18. Correlation analysis showed that FT (free testosterone) had negative correlation with CRP, IL-6 and sICAM-1. Among them FT had well correlation with CRP, correlation index was −0.678. Conclusion: Free testosterone was in negative correlation with atherosclerosis in old-age male. Free testosterone may have the role of anti-atherosclerosis, and this effect was not achieved by its transformation to estradiol. Low free testosterone level was followed by increased level of inflammatory cytokines. Low free testosterones coexist with inflammation and they both affect the process of atherosclerosis in old-age male. Project (No. 2003B045) supported by the Health Bureau of Zhejiang Province, China  相似文献   

猪血细胞的柱层析分离研究     

叶初星  江纪修  陈光梓  黄蕾 《中山大学学报论丛》1992,(3)

本文研究了用4种纤维素和2种离子交换树脂作柱层析材料,分离猪血红细胞的效果。实验结果表明:CM-纤维素-1和DEAE-纤维素-DE23分离效果较好,前者红细胞收率为95.7％,白细胞和血小板的清除率分别为99.8％和84.6％;后者红细胞收率为66.5％,白细胞和血小板都能彻底除去。  相似文献   

哲学化的血性意识——评D·H·劳伦斯的文艺思想     

朱谷强 《韩山师范学院学报》2000,(1)

劳伦斯的作品流淌的是激情,推崇的是人的本性。本文试图从哲学的角度探索他的文艺思想与血性意识的渊源,从而揭示血性意识的本质。  相似文献   

运动预适应对过度训练大鼠心肌缺血缺氧损伤及血清MDA影响的研究     

李翠霞  潘忠勉  李杰 《体育科技》2013,(5):56-59

[目的]：研究运动预适应对过度训练大鼠心肌缺血缺氧形态影响及血清MDA.[方法]：将鼠随机分为安静对照组、一般训练组、过度训练组、运动预适应组.安静对照组常规饲氧,不加干预;一般训练组第1-2w常规饲养,第3-4w进行无负重游泳运动,每次游泳1h/d,每周游泳6天.过度训练组第1-2w常规饲养,第3-4w每天进行一次尾部负重3％体重的负荷进行力竭性游泳,每周游泳6天.运动预适应组第1-2W大鼠每天尾部负重3％体重负荷进行间歇性游泳运动一次,每天游泳15 min,休息5 min,重复3次,6 d/周,周日休息,第3-4周运动与过度训练组的第3-4周训练一致.训练结束后取材,进行常规HE染色和HBEP染色并摄片,测血清MDA.[结果]：HE染色,过度训练组肌纤维排列紊乱,部分肌纤维界限模糊.运动预适应组肌纤维轮廓较清楚.HBEP染色过度训练组有若干片状的红色缺血缺氧部位;运动预适应组心肌缺血缺氧改变程度比过度训练组明显减轻.运动各组大鼠血清MDA均高于安静对照组;过度训练组高于一般训练组和运动预适应组.[结论]：运动预适应可以降低过度训练大鼠血清MDA的含量,对心肌缺血缺氧性损伤产生保护作用.  相似文献   

Comparison of maximal anaerobic running tests on a treadmill and track     

Ari Nummela  Ismo Hämäläinen  Heikki Rusko 《Journal of sports sciences》2013,31(1):87-96

Abstract

To develop a track version of the maximal anaerobic running test, 10 sprint runners and 12 distance runners performed the test on a treadmill and on a track. The treadmill test consisted of incremental 20-s runs with a 100-s recovery between the runs. On the track, 20-s runs were replaced by 150-m runs. To determine the blood lactate versus running velocity curve, fingertip blood samples were taken for analysis of blood lactate concentration at rest and after each run. For both the treadmill and track protocols, maximal running velocity (v _max), the velocities associated with blood lactate concentrations of 10 mmol · l^?1 ( v _10 mM) and 5 mmol · l^?1 ( v _5 mM), and the peak blood lactate concentration were determined. The results of both protocols were compared with the seasonal best 400-m runs for the sprint runners and seasonal best 1000-m time-trials for the distance runners. Maximal running velocity was significantly higher on the track (7.57 ± 0.79 m · s^?1) than on the treadmill (7.13 ± 0.75 m · s^?1), and sprint runners had significantly higher v _max, v _10 mM, and peak blood lactate concentration than distance runners (P<0.05). The Pearson product – moment correlation coefficients between the variables for the track and treadmill protocols were 0.96 (v _max), 0.82 (v _10 mM), 0.70 (v _5 mM), and 0.78 (peak blood lactate concentration) (P<0.05). In sprint runners, the velocity of the seasonal best 400-m run correlated positively with v _max in the treadmill (r = 0.90, P<0.001) and track protocols (r = 0.92, P<0.001). In distance runners, a positive correlation was observed between the velocity of the 1000-m time-trial and v _max in the treadmill (r = 0.70, P<0.01) and track protocols (r = 0.63, P<0.05). It is apparent that the results from the track protocol are related to, and in agreement with, the results of the treadmill protocol. In conclusion, the track version of the maximal anaerobic running test is a valid means of measuring different determinants of sprint running performance.  相似文献   

Activity profile and physical demands of football referees and assistant referees in international games     

Peter Krustrup  Werner Helsen  Morten B. Randers  Jesper F. Christensen  Christopher MacDonald  Antonio Natal Rebelo 《Journal of sports sciences》2013,31(11):1167-1176

Abstract

Time-motion analyses and physiological measurements were performed to investigate the physiological demands of football referees (n = 15) and assistant referees (n = 15) in international games and to examine whether high-intensity running (HIR) correlates to the referees' ability to keep up with play. Total distance covered (10.27 ± 0.90 vs. 6.76 ± 0.83 km) and HIR (1.92 ± 0.58 vs. 0.97 ± 0.22 km) was higher (P < 0.05) for referees than assistant referees, while sprinting distance was not different. Referees covered 0.89 ± 0.37 km by backwards running and assistant referees covered 1.54 ± 0.66 km by sideways running. Mean heart rate was higher (P < 0.05) for referees than assistant referees (150 ± 3 vs. 123 ± 3 b.p.m.), whereas blood lactate was not different. Backwards/sideways running decreased (P < 0.05) from the first to the last 15-min period for referees (49%) and assistant referees (42%), whereas HIR was unaltered. HIR was inversely correlated with the five highest distances from infringements in both halves (r = ?0.60 and ?0.58, P < 0.05). In conclusion, international match officials carry out an important amount of HIR throughout games, while low-intensity and unorthodox running activities are reduced during games. Referees performing the most high-intensity work are better to keep up with play. The match activities differ significantly between referees and assistant referees, which should be considered in training and testing procedures.  相似文献   

Age-related differences in repeated-sprint ability in highly trained youth football players     

Iñigo Mujika  Matt Spencer  Juanma Santisteban  Juan José Goiriena  David Bishop 《Journal of sports sciences》2013,31(14):1581-1590

Abstract

In this study, we investigated the age-related differences in repeated-sprint ability and blood lactate responses in 134 youth football players. Players from the development programme of a professional club were grouped according to their respective under-age team (U-11 to U-18). Following familiarization, the participants performed a repeated-sprint ability test [6 × 30-m sprints 30 s apart, with active recovery (2.0–2.2 m · s^?1) between sprints]. The test variables were total time, percent sprint decrement, and post-test peak lactate concentration. Total time improved from the U-11 to U-15 age groups (range 33.15 ± 1.84 vs. 27.25 ± 0.82 s), whereas no further significant improvements were evident from U-15 to U-18. No significant differences in percent sprint decrement were reported among groups (range 4.0 ± 1.0% to 5.5 ± 2.1%). Post-test peak lactate increased from one age group to the next (range 7.3 ± 1.8 to 12.6 ± 1.6 mmol · l^?1), but remained constant when adjusted for age-related difference in body mass. Peak lactate concentration was moderately correlated with sprint time (r = 0.70, P > 0.001). Our results suggest that performance in repeated-sprint ability improves during maturation of highly trained youth football players, although a plateau occurs from 15 years of age. In contrast to expectations based on previous suggestions, percent sprint decrement during repeated sprints did not deteriorate with age.  相似文献