收入分配差距过大不能归因于效率优先

公平分配不是没有收入分配差距.效率优先符合历史唯物主义基本原理,且效率优先不一定导致收入分配差距过大.我国现阶段的收入分配差距过大,不能归因于效率优先.要缩小收入分配差距,必须在效率优先的基础上更加注重公平:继续加大西部大开发,积极推进新农村建设;构建公平收入分配秩序,消除不合理和非法收入;完善财税和社会保障制度,有效调节社会收入再分配.     

跆拳道运动员焦虑特质与急性心理应激后免疫球蛋白变化的相关研究

本文以48名在校高水平男女跆拳道运动员作为研究对象,采用STAI量表测量其焦虑特质,采用比浊法测量其免疫球蛋白含量,分析不同焦虑特质的跆拳道运动员在心理应激后的免疫应答。结果表明:心理应激后,高特质焦虑组免疫球蛋白IgM高于低特质焦虑组,而高状态焦虑组免疫球蛋白IgA含量明显低于低焦虑组,高焦虑组的运动员免疫抑制表现更为明显。结论:根据运动员的焦虑特点,有针对性的进行心理训练,稳定运动员的情绪,提高运动成绩,促进运动员的身体健康。     

大学生焦虑心理及其对策

焦虑心理是大学生常见的心理障碍．对大学生的健康成长产生较大的影响。本文就大学生产生焦虑心理的因素，从社会环境、家庭问题、个体素质、生活应激等方面加以分析。并就大学生焦虑心理提出了从和谐的环境、良好的学风、心理的辅导、生活的帮助等方面进行预防与干预，解决大学生焦虑心理问题，帮助大学生健康成长。     

复合维生素添加剂对高温期淮北麻鸡生产性能和免疫功能的影响

目的:研究饲粮中添加不同水平的复合维生素添加剂对淮北麻鸡生产性能和免疫功能的影响及其相关性。方法:选取480只28周龄淮北麻鸡,随机分为4组,每组3个重复,每个重复40只鸡,饲喂在基础日粮分别添加复合维生素添加剂0(Ⅰ组,对照组)、100 mg/kg(Ⅱ组)、500 mg/kg(Ⅲ组)、1000 mg/kg(Ⅳ组),预试期2周,正试期8周。结果:与对照组比较,1)Ⅲ、Ⅳ组产蛋率比显著提高(P0.05),料蛋比显著降低(P0.05),蛋的受精率、孵化率及出雏率显著提高(P0.05);而Ⅱ组产蛋率、料蛋比、蛋孵化率和出雏率的变化不显著(P0.05);2)Ⅲ、Ⅳ组中血清免疫球蛋白A(Ig A)、免疫球蛋白M(Ig M)和补体C4含量显著提高(P0.05);而Ⅱ组中以上指标含量变化不显著(P0.05);3)Ⅲ、Ⅳ组血清超氧化物歧化酶活性和血清谷胱甘肽过氧化物酶活性及总抗氧化能力明显提高(P0.05),而Ⅱ组变化不明显(P0.05)。结论:饲粮中添加500~1000 mg/kg复合维生素添加剂能提高热应激条件下淮北麻鸡的生产性能、抗氧化能力和免疫功能。     

应用光弹性法和位错法求解应力强度因子

用光弹性法和位错法两种方法求解工程断裂力学中的应力强度因子K1，通过实验法和数值解法所得结果相比较，可得其解值与实际均基本吻合，满足工程实际要求。这两种方法都具有简单方便的特点。     

高校体育与大学生心理健康关系的研究

有效应对各种心理压力并保持心理健康是每个大学生都应学会的一项技能,从分析校园体育与心理健康的关系入手,说明体育活动和校园体育文化对大学生的心理健康具有明显促进作用。最后,提出了一些在高校体育中实现大学生心理健康的发展对策。     

外源水杨酸对水稻幼苗盐胁迫下生理效应的影响

研究了在盐胁迫条件下外源水杨酸(SA)对水稻幼苗耐受性应答的影响.本研究以水稻为材料,用1 mmol/L的外源水杨酸对水稻幼苗叶片进行喷雾处理,静置24 h后,经SA处理后的水稻幼苗再经过100 mmol/L的NaCl胁迫处理0-48 h.结果表明,经外源水杨酸处理的水稻幼苗,能显著增强体内脯氨酸(Pro)、可溶性蛋白的含量以及超氧化物歧化酶(SOD)、过氧化物酶(POD)等保护酶的活性,显著降低丙二醛(MDA)的含量.表明在盐胁迫条件下,外源水杨酸能增强水稻幼苗自身抗氧化系统中酶的活性,减轻和缓解盐胁迫带来的伤害.     

内压下回转壳体的应力分析和强度设计

应用薄膜理论、第三强度理论探讨了内压作用下环壳内的应力和应力状态,对薄壁回转壳体的强度设计、计算壁厚进行了详细分析.     

Increased exhaled breath condensate 8-isoprostane after a swimming session in competitive swimmers

Objectives: This study aimed to evaluate the levels of 8-isoprostane (8-IsoP) in the airways of competitive swimmers at baseline and after a swimming session according to their airway responsiveness. Methods: Twenty-three swimmers and six lifeguards had a baseline spirometry and bronchoprovocative challenges. During a second visit, swimmers performed a usual swimming session while lifeguards stayed in the same pool environment for the same time period. Forced expiratory volume in one second (FEV₁) was measured before and 5 min after the end of the session. Exhaled breath condensate (EBC) was sampled before and 10 min after the session and EBC 8-IsoP levels were analysed by enzyme immunoassay. Change in EBC 8-IsoP from baseline to post-swimming session was calculated. Results: We observed no relationships between airway hyper-responsiveness and 8-IsoP values before or after swimming in swimmers. The levels of 8-IsoP were significantly higher after the training session (mean value 2.9, s?=?0.5 pg?mL^?1) than at baseline (mean value 1.9, s?=?0.4 pg?mL^?1) in swimmers only (p?=?.012). EBC 8-IsoP levels after the swimming session significantly correlated with the percent change in FEV₁ after swimming. Conclusions: EBC 8-IsoP levels were increased after training in swimmers but not in lifeguards, suggesting that exercise-induced hyperpnoea in a chlorinated pool environment increases airways oxidative stress.     

Mindfulness-based meditation to decrease stress and anxiety in college students: A narrative synthesis of the research

ObjectiveThe primary purpose of this paper was to narratively review the research testing the effects of mindfulness meditation on stress and anxiety in the college students; reviewing the inclusion of mindfulness was a secondary purpose.MethodsA literature search resulted in 57 studies on the effectiveness of mindfulness meditation in reducing stress and anxiety in college students.ConclusionsResearchers examined anxiety in 40 studies, self-reported stress in 34, physiological stress in 11, and mindfulness in 24. Thirty-three of 40 and 25 of 34 studies showed significant decreases in anxiety and stress respectively; 22 of 24 showed an increase in mindfulness. Physiological stress had inconsistent results indicating a need for further research. Overall, mindfulness meditation shows promise in reducing stress and anxiety in college students. Additionally, there are a number of differences in mindfulness interventions including frequency, duration, instructional method, and inclusion of yoga, that need quantitative examination (meta-analysis) to determine which is most effective.