西红柿贮藏过程中几个生理参数动态变化的研究

本文研究了西红柿在贮过程中呼吸强度、过氧化物酶和过氧化氢酶活性的动态变化、结果证明,西红柿果实在贮藏期间呼吸强度和过氧化物酶的活性交化是同步的,而过氧化氢酶正好相反。这些变化反映了果实的成熟程度和组织衰老的状况,据此可以认为这三者均可作为西红柿贮藏的重要生理参数。     

呼吸传感器的研制

利用压电陶瓷的压电效应，研制出一种呼吸传感器，将实验动物呼吸的变化，以电压变化的形式，通过记录仪描记成曲线，为测量实验动物的呼吸频率和呼吸强度，提供了一种新的实验手段。     

不同品种水稻对乙草胺敏感性差异的生理原因探讨

用三种浓度的乙草胺处理对其敏感性不同的三种水稻（敏感品种华籼占、中抗品种粤优青占和抗性品种穗灵占）的发芽种子,水稻幼苗的呼吸速率不同程度受抑制,乙烯释放速率不同程度受干扰,两方面均以华籼占受影响最大,穗灵占受影响最小,粤优青占受影响居中;华籼占为"乙烯-呼吸谐变型";穗灵占为"乙烯-呼吸异变型";品种固有的"乙烯-呼吸型"的差异是不同品种水稻对乙草胺敏感性不同的内在生理原因。     

严重呼吸综合征的胸部影像表现

目的 :总结严重急性呼吸综合征 (SARS)的胸部X线表现及变化规律。方法 :分析 5 1例经临床确诊的SARS患者一系列胸部X线进行统计分析。结果 :患者均以发热为最早发病症状 ,10 0 %患者在发病后 1周内X线胸片出现局灶性斑片状模糊阴影 ,2周内达到高峰 ,15 .6 %患者为双肺多肺炎性病变 ,5 2 .9%患者为左肺 ,右肺为 31.4 % ,大部分肺野受累 ,病情重 ,98%患者在 4周内肺部阴影逐渐消散。结论 :肺部病变越早 ,范围越广 ,发展越迅速 ,临床症状越重。     

替考拉宁治疗老年下呼吸道感染临床观察

目的了解替考拉宁治疗老年下呼吸道感染的临床有效性和毒副作用的发生情况。方法对南通大学附属医院2002年5月～2003年5月住院的老年下呼吸道感染患者34例，应用安万特医药公司产品替考拉宁治疗；疗程至少4～7天。严重感染可延长用药时间；并进行治疗前后的临床症状、细菌清除情况、以及不良反应的统计分析。结果22例痰培养检出MRSA，4例检出MRSE。临床有效率76．5％；细菌清除率60％；相关肝、肾功损害分别为2例、4例。占17．6％。结论替考拉宁治疗老年下呼吸道感染疗效好。毒副作用相对较低．使用较为安全。     

PRRSV弱毒疫苗鼻腔接种对母猪子宫黏膜内淋巴细胞的影响

试验研究了猪繁殖与呼吸综合征病毒(PRRSV)弱毒疫苗鼻腔接种对母猪子宫黏膜内淋巴细胞分布的影响.试验选用4月龄长白×大约克夏二元杂交母猪12头.结果表明:鼻腔接种可使猪子宫角、体和颈黏膜上皮内淋巴细胞的数量较对照组增加,差异显著(P＜0.01).经鼻腔接种时,子宫黏膜固有层中多见淋巴细胞聚集成群,并向黏膜腔表面排放.说明PRRSV弱毒疫苗鼻腔接种对母猪子宫黏膜及上皮内淋巴细胞的分布具有显著影响.     

镉胁迫对水稻颖果充实和生理活性的影响

通过盆栽试验探讨Cd^2＋胁迫对扬稻6号和粳稻941颖果充实和生理活性的影响,结果表明：Cd^2＋胁迫降低颖果呼吸速率、光合速率以及ATP含量;降低颖壳和果皮叶绿素含量;使颖果灌浆速率减慢,鲜干重增加的速率减缓,灌浆的天数变短,最终成熟颖果干重降低。说明Cd^2＋胁迫降低颖果呼吸活性、能量物质以及其它生理活性,从而降低颖果的代谢活性和发育时间,最终导致贮藏物质的合成和积累量降低。     

Effects of inspiratory muscle training in professional women football players: a randomized sham-controlled trial

This study was conducted to determine the effects of inspiratory muscle training (IMT) on respiratory and peripheral muscles oxygenation during a maximal exercise tolerance test and on repeated-sprint ability (RSA) performance in professional women football players. Eighteen athletes were randomly assigned to one of the following groups: SHAM (n = 8) or IMT (n = 10). After a maximal incremental exercise test, all participants performed (on a different day) a time-to-exhaustion (Tlim) test. Peripheral and respiratory muscles oxygenation by near-infrared spectroscopy, breath-by-breath ventilatory and metabolic variables, and blood lactate concentration were measured. The RSA test was performed on a grass field. After a 6 week intervention, all athletes were reevaluated. Both groups showed increases in inspiratory muscles strength, exercise tolerance and RSA performance, however only the IMT group presented lower deoxyhemoglobin and total hemoglobin blood concentrations on intercostal muscles concomitantly to an increased oxyhemoglobin and total hemoglobin blood concentrations on vastus lateralis muscle during Tlim. In conclusion, these results may indicate the potential role of IMT to attenuate inspiratory muscles metaboreflex and consequently improve oxygen and blood supply to limb muscles during high-intensity exercise, with a potential impact on inspiratory muscle strength, exercise tolerance and sprints performance in professional women football players.     

Self-reported asthma and respiratory symptoms among Italian amateur athletes

Abstract

The purpose of this study was to examine the interactive effects of hardiness (high vs. low hardiness) and anxiety direction (facilitators vs. debilitators) on performers' competitive anxiety intensity responses, self-confidence levels and the frequency and effectiveness of coping usage. Significant interaction effects showed that the high hardiness/facilitators reported the greatest use of planning, active coping and effort strategies during stressful competitive situations and viewed this use as more effective in dealing with these situations than the other groups. Main effects for hardiness on the competitive anxiety response and self-confidence revealed the high hardiness group to have lower levels of worry and somatic anxiety and higher levels of self-confidence than the low hardiness group. These findings have important implications for the development of hardiness-related coping strategies in sport performers.     

光合细菌光合作用与呼吸作用相互关系机理探讨

探讨了光合细菌光合作用与呼吸作用的关系和相互抑制机理,提出了光合细菌光合链与呼吸链的组成和排列顺序。