不同负荷运动训练对大鼠红细胞膜的影响   总被引：2，自引：0，他引：2  

郑兵  赵歌  王震 《广州体育学院学报》2004,24(6):45-47

通过本实验研究得出以下结论力竭运动后L组RBCMNa+-K+ATP酶活性增加,提示适宜负荷的运动训练不但可提高安静时酶活性,且可增强其活性的储备力.H组酶活性受其膜组成及物理特性改变的影响而下降,反过来又影响膜特性及功能,提示大负荷训练造成的膜理化性生质的改变是相互关联的.运动训练对Ca2+-ATP酶活性无明显影响,H组活性的下降与其RBCM上脂质组成及其膜流动性的变化有关.  相似文献   

补充三宝胶囊对大运动量训练大鼠血清性激素水平与运动能力的影响     

卢向阳  乔玉成  张红娟 《北京体育大学学报》2006,29(4):497-499

为了探讨三宝胶囊对大运动量训练大鼠血清睾酮(T)、皮质酮(Cort)、黄体生成素(LH)含量及运动能力的影响.将雄性SD大鼠37只,随机分为:安静对照组(C);中药对照组(M);运动组(T);中药运动组(M T).中药组和中药运动组分别灌服三宝胶囊,运动组与中药运动组进行8周大运动量训练.于第7周末进行力竭性运动实验,第8周末次训练后18 h取样测定血清睾酮、皮质酮、黄体生成素含量.结果发现:1)服用三宝胶囊的中药运动组大鼠游泳至力竭的时间比单纯运动组延长了38.12%(P＜0.01).2)大运动量训练后18 h,T组大鼠血清睾酮仍处于较低水平(P＜0.01);M T组血清睾酮水平显著上升(P＜0.05).3)T组血清Cort水平显著增高(P＜0.05),M T组有降低趋势,但无统计学意义.4)T组T/Cort比值明显下降(P＜0.01),M T组T/Cort比值明显增高(P＜0.01).5)T组血清LH明显升高(P＜0.05),M T组LH基本维持在正常水平.表明:大运动量训练机体长时期服用三宝胶囊能促使血睾酮水平的提高,防止因大运动量训练导致的睾酮/皮质酮比值下降,有助于延缓大运动量训练疲劳的产生,促进恢复,提高运动能力.  相似文献   

Reliability of arterial spin labelling measurements of perfusion within the quadriceps during steady-state exercise     

Jonathan Fulford  Anni Vanhatalo 《European Journal of Sport Science》2016,16(1):80-87

Arterial spin labelling (ASL) provides a potential method to non-invasively determine muscle blood flow and examine the impact of interventions such as supplementation and training. However, it's a method with intrinsically low signal, leading to limitations in accuracy and temporal resolution. To examine these limitations, the current study measured perfusion via ASL on three occasions in the rectus femoris of 10 healthy adults, during light and moderate exercise, over three different exercise durations. For data sampled over 9 min, light intensity exercise gave an average perfusion of 35.0 ± 5.1 ml/min.100g^?1 with a coefficient of variation (COV) of 16% and single intraclass correlation coefficient (ICC) of 0.67. For the moderate bout, perfusion was 51.3 ± 5.6 ml/min.100g^?1 (COV 10%, ICC 0.82). When the same data were analyzed over 5 min 24 s, perfusion was 37.8 ± 11.13 (COV 30%, ICC 0.13) during light and 49.5 ± 8.8 ml/min.100g^?1 (COV 18%, ICC 0.52) during moderate exercise. When sampling was reduced to 1 min 48 s, perfusion was 41.2 ± 13.7 (COV 33%, ICC 0.26) during light and 49.5 ± 13.6 ml/min.100g^?1 (COV 28%, ICC 0.04) during moderate exercise. For 9 min a significant perfusion difference was found between the exercise intensities; however, this was not the case for sampling over 5 min 24 s or 1 min 48 s. Such findings illustrate the potential of ASL to non-invasively monitor muscle perfusion under steady-state conditions, but highlight that extended exercise protocols are necessary in order to generate date of sufficient reliability to be able to discriminate intervention dependent perfusion differences.  相似文献   

心衰康煎液对阿霉素心衰模型大鼠心肌的影响     

季增荣  金春亭  王淑强  王陶冶 《河北北方学院学报(医学版)》2001,18(6):10-11

目的观察中药复方制剂"心衰康煎液"对心衰大鼠心脏血流动力学的影响及心肌细胞的病理学改变.方法利用pclab实验记录分析系统观察和分析各实验组大鼠左心室内压、对大鼠心肌切片H.E染色镜下观察.结果心衰康使心衰得到明显改善,心肌细胞无明显变性、坏死.结论中药复方"心衰康煎液"对心衰大鼠的心肌病变有明显改善,从而产生良好的抗心衰作用.结论  相似文献   

Alterations in autonomic cardiac modulation in response to normobaric hypoxia     

David Giles  John Kelly 《European Journal of Sport Science》2016,16(8):1023-1031

Purpose: The present study aimed to determine if autonomic cardiac modulation was influenced by acute exposure to normobaric hypoxia. Method: Ten healthy male lowland dwellers completed five block-randomised single-blinded, crossed-over acute exposures to a normobaric hypoxic environment, each separated by 24 hours’ recovery (20.3%, 17.4%, 14.5%, 12.0% and 9.8% F_IO₂). Supine recordings were made of arterial oxygen saturation and electrocardiogram (ECG). RR intervals from the ECG trace were analysed for time (SDNN, lnrMSSD), frequency (lnVLF, lnLF, lnHF, lnTP, LFnu, and HFnu), and nonlinear (DFA-α1 and SampEn) heart rate variability components. Results: A significant reduction in arterial SaO₂ occurred with reduced F_IO₂, along with a rise in heart rate (Cohen’s d?=?1.16, 95% Confidence Interval [2.64–6.46]), significant at 9.8% F_IO₂. A decrease in autonomic cardiac modulation was also found as shown by a statistically significant (at 9.8% F_IO₂) decrease in lnTP (d?=?1.84 [1.74–1.94]), and SampEn (d?=?0.98 [0.83–1.12]) and an increase in DFA-α₁ (d?=?0.72 [0.60–0.84]) from normoxia at 9.8% F_IO₂. Conclusion: The decrease in variability indicated a reduction in autonomic cardiac modulation. There appears to be a threshold ～9.8% F_IO₂ (～6000?m equiv.), below which significant alterations in autonomic control occur.  相似文献   

香菇菌株9907的选育及生物学特性     

刘卫今  刘胜贵 《怀化学院学报》2005,24(2):71-73

从怀化市及沅陵、中方、麻阳等县采集野生香菇子实体,通过分离、初筛、复筛和栽培试验,选育出一株较好的菌株香菇9907.香菇菌株9907属于低温结实型,菌丝体生长速度快,花菇率及生物学效率均较高,适合代料栽培.  相似文献   

离体器官静息张力检测装置的优化设计与应用     

马剑峰  王丽  刘萍  马絮飞  吴燕  金增祥  王立祥 《实验技术与管理》2007,24(8):52-54

在离体器官实验中，标本悬挂、静息张力调节是实验成功的关键，为此，我们首创并研制了离体器官实验的关键设备——离体器官静息张力检测装置。该文介绍了该装置的构造、技术原理以及在教学、科研中的具体应用。该装置操作简便，能灵敏、准确的调节离体器官标本的静息张力，可更客观、更准确地反映各种理化及药物因素对离体器官平滑肌的影响。  相似文献   

非洲菊组织培养研究进展   总被引：7，自引：1，他引：7  

张平 《宁德师专学报(自然科学版)》2004,16(1):69-73

综述近几年来非洲菊组织培养中包括外植体选择、组织培养培养基筛选、移栽管理等方面的研究进展．  相似文献   

荷兰小黄瓜“欧宝1617”的组培快繁技术研究     

张希太  谢淑芹  张彦波  肖磊 《河南职业技术师范学院学报》2011,(2):25-28

为降低＂欧宝1617＂小黄瓜种植的种苗成本,对＂欧宝1617＂小黄瓜的腋芽再生组织培养技术进行了研究.适合＂欧宝1617＂小黄瓜种子苗的茎尖和试管苗单茎节段的腋芽生长增殖的最佳培养基为MS＋IBA（0.2~0.5）mg/L,在30 d继代周期内能以7倍增殖＂.欧宝1617＂小黄瓜试管苗驯化移栽的最佳基质为上面1/3蛭石下面2/3腐质土的双层基质法.  相似文献   

植物组织培养虚拟实验室的构建     

沈洁  关国元  许云华 《连云港师范高等专科学校学报》2011,(3):96-97

文章运用Flash技术构建了多场景式实时交互的植物组织培养虚拟实验室。所开发的网络虚拟实验,可以对实验过程进行完整展现,使学生熟悉实验仪器、环境,掌握实验步骤,起到良好的辅助实验教学的目的。  相似文献