谷粮中硫丹及其代谢物残留的GC-MS分析

本文建立了固相萃取-气相色谱-质谱法(SPE-GC-MS)同时测定谷粮中硫丹及其代谢物的方法.样品经过正己烷提取、固相萃取拄净化,采用GC-MS检测,外标法定量.在此条件下,样品加标回收率在87.3％～110.2％之间,相对标准偏差在1.7％～3.9％之间(n=6),方法检出限(S/N=3)为0.002mg/kg～0.003mg/kg.该方法简便、快速,具有良好的灵敏度、重复性,可适用于谷粮中硫丹及其代谢物残留的检测.     

浅谈半煤岩快速掘进工艺研究

葛泉矿主采5#煤,5#煤层老顶为4-5m野青灰岩,直接顶为9-10m泥质粉砂岩,煤层厚度在1.10-1.52米间,平均为1.30米.根据该区域钻孔资料分析,该面煤层倾角最小13°,最大26°,平均19°左右.本区水文地质条件较复杂,主要有底板砂岩水、伏青灰岩水,掘进受钻探防治水影响较大.2012年3月份,在13503工作面两巷通过推行掘进装备系列化、抓好正规循环作业,采用大功率钻机进行钻探施工等措施,实现半煤岩单孔月进736的好成绩.对快速掘进所采用的措施和遇到的问题进行了研究总结,为以后半煤岩快速高效掘进打下坚实基础.     

LiOH·H2O中除F-、SO42-工艺探索进展

介绍氢氧化锂溶液中除F-、SO42-方法的摸索性实验及其实验结果,确定重结晶法去除F-、SO42-的工艺方法并经过生产性重结晶验证试验。试验表明,氢氧化锂溶液采用间断定量蒸发操作及确立的工艺控制参数：原溶蒸发浓缩约比为1：0.3;蒸汽压力0.10MPa~0.15MPa;蒸发锅内真空度为-0.065MPa;蒸发时间在2.0h~2.5h;冷却水快速冷却至浓缩液温度45℃~55℃;使用三足式离心机制备的单水氢氧化锂中F-、SO42-含量符合指标要求,其杂质元素F-约100μg·g-1、SO42-约30μg·g-1,一次直收率为60%左右。     

HPLC法测定苯磺酸氨氯地平片溶出度的研究

目的:建立高效液相色谱法同时测定几种规格苯磺酸氨氯地平片溶出度的方法.方法:采用Agilent ZORBAX SB C18 (150×4.6mm,5μm)色谱柱,流动相为甲醇-0.03mol/L磷酸二氢钾(70:30),流速为1.0ml·min-1;检测波长为237nm;柱温25℃.结果:氨氯地平在0.003～0.0241mg/ml范围内,峰面积与浓度线性关系良好(r=0.9999),高、中、低六种浓度的平均加样回收率为98.3％-101.0％,RSD为0.60％.结论:方法准确、简便、快速,适用于多种规格苯磺酸氨氯地平片溶出度的测定.     

MEMS光学开关的设计与分析

由于传统机械结构设计的方法的种种缺点,本文提出了一种以系统级分析方法的方法实现 MEMS光学开关的快速设计与优化。通过采用Coventorware软件ARCHITECT模块建立MEMS光学开关模型,分析了多物理耦合场下 MEMS光学开关的动态响应特性,得到位移和电压大小的对应关系曲线,以及固有频率分析曲线。结合微机械工艺要求,通过系统级仿真,大大缩短了设计周期,同时提高机械结构的合理性。     

运动对女性甲基苯丙胺依赖者血清炎症因子的影响

目的 探讨瑜伽、冥想和体能运动对女性甲基苯丙胺依赖者血清中丙二醛(Malondialdehyde,MDA)、细胞间粘附分子-1(Intercellular adhesion molecule,ICAM-1)和白细胞介素-1(Interleukin-1,IL-1)的影响,旨在为降低该人群的氧化应激和炎症反应提供思路.方法...     

心脏康复中运动终止原因的预测

目的:通过分析心肌梗塞后患者(PMI患者)运动中功能、生理、知觉和临床的反应,检测他们运动终止的主要原因(RET),目的在于确定RET是否可被预测得出;方法:112名男性近期PMI患者在活动跑台上进行递增负荷运动实验,运动终止依美国运动医学会推荐的标准。随后,受试者依据不同的运动终止原因被细分为4个组(生理组,身体组,感觉组和临床组)。运动中记录主观用力感觉、血压、血乳酸浓度(BL)、摄氧量、心率和呼吸困难记分,并且连续监控12导联心电图。运动前测量血胆固醇浓度(BC)。结果显示,在运动能力方面,身体组和知觉组的运动终止原因优于临床组,但劣于生理组。患者的分布在BC为5.4mmol·L-1和BL为1.6mmol·L-1这两点出现了显著的组间差异(P<0.01或P<0.05)。在获得了安静状态下的BC和BL,病人的RET便可被预测出来,且预测具有较高的敏感性和特异性。结论:利用本研究得出的方法对RET进行预测,在心脏康复的运动实验和处方制定中,都可发挥出有益的作用。     

影·像“星战”——用眼睛记录的StarsWar7

影·像星战2012年6月16日,一年一度的"星战":StarsWar再一次的降临上海。这次的StarsWar7依然是历经历经1个多月的海选以及线上的预赛,6月16-17日,星战第七回合再度响起在上海正大广场9楼。久违的中韩对抗,久闻大名的各路豪杰,当17日晚星战落下帷幕,我们最该用这些经典的瞬间,来纪念这难忘的影·像。     

中外赛艇项目男子双人单桨高水平运动员配速结构对比分析

目的：通过对比分析中外赛艇男子双人单桨项目高水平运动员比赛中速度节奏和分段成绩,研究中外配速结构特点及存在差异的原因,为该项目训练竞赛迈向国际化高水平提供参考。方法：搜集整理2021年全运会、2020东京奥运会等四届奥运会比赛前八名成绩资料,采用文献资料、专家访谈、数理统计等方法对比分析分段配速、配速结构、桨频、变化幅度等内容。结果：(1)我国男子双人单桨高水平运动员四分段成绩与国外高水平相差2.6%、0.8%、4.4%、3.8%;(2)D1、D2分段成绩与总成绩Q相关无显著性差异(P>0.05),D3、D4与总成绩Q相关呈显著性差异(P<0.01);(3)国外男子双人单桨高水平运动员配速结构为“快速-降速-加速-再加速”,我国男子双人单桨高水平运动员配速结构为“快速-降速-再降速-加速”。结论：国际男子双人单桨决赛配速结构具有明显优势,已成为新的竞技趋势,我国男子双人单桨高水平运动员要尽快学习和尝试国外新的配速结构,并在这一配速结构的引领下,采取训练对策,改进方法手段。     

基于GARCH模型的中体产业股票价格波动性实证研究

以1998年3月-2007年12月中体产业股份有限公司股票的2 535个日收盘价格指数为研究样本,运用GARCH模型对中体产业股票价格的波动性进行了实证研究,结果表明,中体产业股票价格的时间序列存在明显的非线性特征,1998年3月-2007年12月间出现两次大幅度的波动.股价收益率具有显著的波动集聚性,且表现出"尖峰、厚尾、非正态"的特征,在10%、5%、1%临界值水平下均存在显著的平稳性.GARCH(1,1)模型可较好拟合中体产业股票价格的波动变异性.股价收益率的波动具有较强的波动集聚性和持续性,且收益率当期方差冲击的79.86%在下期仍存在.从该模型的条件异方差看出中体产业股票价格的波动幅度较大,波动集聚现象较为持久.     

Carbohydrate ingestion improves endurance performance during a 1h simulated cycling time trial

This study examined the effect of carbohydrate ingestion on metabolic and performance-related responses during and after a simulated 1h cycling time trial. Eight trained male cyclists (VO 2 peak = 66.5ml kg -1 min -1 ) rode their own bicycles mounted on a windload simulator to imitate real riding conditions. At a self-selected maximal pace, the cyclists performed two 1h rides (separated by 7 days) and were fed either an 8% carbohydrate or placebo solution. The beverages were administered 25 min before (4.5ml kg -1 ) and at the end (4.5ml kg -1 ) of the ride. With carbohydrate feeding, plasma glucose tended (P = 0.21) to rise before the time trial. Compared with rest, the plasma glucose concentration decreased significantly (P < 0.05) at the end of both rides, with no statistically significant difference being observed between treatments. Thereafter, plasma glucose increased significantly (P < 0.05) at 15 and 30 min into recovery, and was significantly higher at 30 min during the carbohydrate trial compared with the placebo trial. No significant changes in plasma free fatty acids were observed during the ride. However, a significant increase (P < 0.05) in free fatty acids was found at 15 and 30 min into recovery, with no difference between trials. Mean power output was significantly (P < 0.05) greater during the carbohydrate compared with the placebo trial (mean - S.E.: 277-3 and 269-3W, respectively). The greater distance covered in the carbohydrate compared with the placebo trial (41.5-1.06 and 41.0–1.06km, respectively; P < 0.05) was equivalent to a 44s improvement. We conclude that pre-exercise carbohydrate ingestion significantly increases endurance performance in trained cyclists during a 1h simulated time trial. Although the mechanism for this enhancement in performance with carbohydrate ingestion cannot be surmised from the present results, it could be related to a higher rate of carbohydrate oxidation, or to favourable effects of carbohydrate ingestion on the central component of fatigue.     

Science and medicine of rowing: A review

The biology and medicine of rowing are briefly reviewed. Effort in a 2000 -m race is about 70% aerobic. Because the boat (and in some instances a cox) must be propelled, successful competitors are very tall, with a large lean mass and aerobic power. Large hearts may lead to erroneous diagnoses of a cardiomyopathy. Large respiratory minute volumes must be developed by chest muscles that are also involved in rowing. The vital capacity is typically large, and breathing becomes entrained. Expiration cannot be slowed relative to inspiration (as normally occurs at high rates of ventilation) and the limiting flow velocity may be reached, with the potential for airway collapse. Performance is strongly related to the power output at the ‘anaerobic threshold’, and lactate measures provide a guide to an appropriate intensity of endurance training. Peak blood lactate levels are higher in males (commonly 11–19 mmol·l -1 and occasionally as high as 25 mmol·l -1) than in females (9–11 mmol·l -1), probably because males have a greater muscle mass in relation to blood volume. The skeletal muscles are predominantly slow twitch in type, developing an unusual force and power at low contraction velocities. Many rowers have a suboptimal diet, eating excessive amounts of fat. Lightweight rowers also have problems of weight cycling. Aerobic power and muscle endurance often change by 10% over the season, but such fluctuations can be largely avoided by a well-designed winter training programme. Injuries include back and knee problems, tenosynovitis of the wrist and, since the introduction of large blades, fractures of the costae.     

我国体育市场管理法规研究

采用调查法和比较法对全国体育市场立法和管理现状进行调查,对部分较早出台并有一定代表性的省市的体育市场管理法规的立法和管理情况进行了研究,提出了体育市场管理立法和管理的原则、基本程序、措施及其一般模式,为规范全国体育市场管理提供参考依据。     

重新认识体育的社会关联

体育与政治之间存在一个悖论，体育的发展与经济实力之间没有直线相关，体育与教育部分重叠，体育与宗教最为近缘，体育可借用科学手段，体育的艺术禀性日益明显，体育与养生反映着两种人生观。     

上海社区体育竞赛参与者的特点探析

本文在专家访谈、问卷调查、数理统计和文献资料分析的基础上,探析了上海社区体育竞赛参与者的特点、参与者对社区体育赛事运作管理的看法等问题。在此基础上从引进社区体育赛事的志愿者、整合社区体育赛事的各种资源、开发社区体育竞赛的无形资产、组建非营利性的专业团队、规范社区体育赛事的服务管理等方面提出了进一步满足上海社区居民日益增长的体育竞赛参赛需求的对策与措施。     

对全面把握游泳训练环节的探讨

从系统观点出发,结合训练实践,对全面把握游泳训练环节进行探讨。认为应强化非智力因素在运动员多年训练中的作用,在育材全过程中不断选材,从整体上把握动态训练的全过程,把培养高水平运动员的整个过程置于一个严格的科学控制之下。     

我国优秀游泳运动员出发技术辅助训练的研究

为改进我国优秀游泳运动员的出发技术,采用观测和实验方法,通过拍摄运动员陆上和水下出发技术录像以及出发计时,对出发技术进行运动生物力学诊断和分析。在此基础上,根据运动员自身特点和不同泳姿提出相应的入水启动方式,并研制出发训练辅助器材,对出发预备姿势、腾起角度以及飞行远度和入水角进行控制。实践证明:这是一种快捷、有效的出发技术辅助训练方法。     

运动性呼吸肌疲劳与耐力性项目的运动能力

影响和限制耐力性运动项目的成绩的生理因素是复杂的和多方面的,取决于训练的强度和运动成绩.大强度持续性运动可导致呼吸肌疲劳.运动性呼吸疲劳可能在决定运动耐量方面起到关键的作用：一方面通过直接影响运动肌力量的生成（外周疲劳）,另一方面,通过肢体用力自感不安反馈引起工作肌运动单位输出功率下降（中枢疲劳）.对呼吸肌进行训练,可能有助于提高耐力性项目的运动成绩.     

Identifying home advantage in international tennis and golf tournaments

A regression analysis of competitors' tournament results in relation to their world rankings was proposed to identify the effect of home advantage in international ‘grand-slam’ tennis and ‘major’ golf tournaments. The results provided little evidence of home advantage in either the grand-slam tennis or the golf tournaments held in 1993. The only possible evidence of home advantage was found in the Wimbledon tennis and the US Open golf championships. Even these findings can be explained, at least partially, by (1) the availability of information concerning the low world rankings of the British tennis players competing at Wimbledon, and (2) selective entry, allowing only the world's top-ranked foreign golfers into the US open golf tournament. In both cases, the lower ranking home competitors have a greater opportunity to perform above their anticipated world rankings. Therefore, provided entry into tennis and golf tournaments is truly ‘open’ to both the host nation's representatives and foreign competitors alike, home advantage does not appear to be a major factor influencing the competitors' performance in such competitions. These findings may be explained by the relatively objective nature of the scoring systems used in tennis and golf, unlike the subjective influence of refereeing decisions on the results of team-games such as soccer.     

对欧洲足球技战术发展趋势的思考

结合欧洲足球技战术的发展特点,就鲁能泰山足球队的体能训练、技术训练、防守阵型、进攻方式、定位球、职业态度、球星培养等诸方面所存在的不足进行了分析,提出相应的改进意见。