湿法冶炼铜砂中的浸出条件研究

研究了湿法冶炼铜砂的浸出条件,在最佳浸出条件下：Ｃｕ、Ｂｉ和Ａｇ的浸出率分别达到９２．２％、９５．４％和８０．５％。     

对某复杂含铟锑渣浸取方法的研究

采用正交试验方法,研究了对某复杂含钢锑渣的浸取方法。实验结果表明：用稀硫酸二段逆流浸取和浓硫酸焙烧－水浸取法,锑渣中钢均有较高的浸取率,并能有效地抑制锑的浸出。     

氨浸菱锌矿法制取锌白

介绍了用氨浸菱锌矿法制取锌白的新方法     

闭隔式流动分析法测定黄河水中的氨氮

介绍了skalar流动分析测试水中氨氮的技术原理,通过精密度、准确度以及和国标方法的比对实验,建立了间隔式流动分析测定氨氮含量的方法。经测试,方法检测限为0．03mg／L,用于黄河水样测定,结果令人满意。     

不同恢复手段对疲劳机体血氨及血尿素的影响

目的：探讨大运动量训练致运动疲劳后,按摩和艾灸穴位对疲劳恢复和相关生化指标的影响。方法：以16名体育学院武术专业学生为试验对象,在不同时间（间隔两周）分别进行两次大运动量训练至中等以上疲劳程度,分别对受试对象进行按摩和艾灸穴位,测试不同时间点的血氨和血尿素值,并对两次实验结果进行自身对照。按摩组为A组,艾灸组为B组。结果：B组的血氨浓度在恢复期的各个时间点上都低于A组,第15min钟和第3min差异非常显著（P〈0.01）,第45min和第60min差异显著（P〈0.05）;B组血尿素的恢复速度也快于A组,第90min明显低于A组（P〈0.05）,次日晨B组较A组恢复更加明显（P〈0.01）。结论：艾灸穴位比按摩能更快清除血氨和血尿素,从而更好地促进运动性疲劳的恢复。     

纳氏试剂分光光度法测定水中氨氮测量不确定度评定

根据测量不确定度评定与表示理论,采用纳氏试剂分光光度法测定水中氨氨的测量不确定度,通过计算和评定,得出该法测定水是氨氮的测量结果2．88mg／l时,取包含因子k=2（约95％置信概率）,扩展不确定度u=0．092mg／l。该不确定度评价方法在实际工作中具有较强的实用价值。     

定向越野运动员赛前训练过程中血氨的变化

为了寻找定向越野运动训练过程中与运动强度相适应的敏感指标,监测定向越野运动员运动训练过程中的身体机能变化,本文利用分光光度法对我院九名定向越野运动员进行了赛前五周血氨的测试。实验结果表明：赛前五周运动员的血氨发生了显著的变化,出现了先升高后降低的变化趋势。结论：定向越野运动训练过程中,血氨能够精确地评价运动员的机体机能状态。     

穴位敷贴对运动性疲劳主观感觉及运动成绩的影响

目的：观察穴位敷贴缓解运动性疲劳的效果及对运动成绩的影响。方法：将20名足球运动员随机分为穴位敷贴组和空白对照组,穴位敷贴组采用药物贴对受试者神阙穴、气海穴、足三里穴进行敷贴,对照组采用安慰贴对受试者上述穴位进行敷贴。对两组受试者进行主观感觉疲劳程度评分（RPE）、运动心情评价（POMS）、情绪状态总估价（TMD）;检测受试者血乳酸和血氨浓度;记录受试者8 00 m全力跑成绩。结果：穴位敷贴可减轻受试者主观疲劳感觉,与治疗前相比,显著降低RPE值（P〈0.01）;穴位敷贴可缓解运动员因疲劳而产生的消极情绪,降低TMD分值,与治疗前相比有统计学差异（P〈0.05）。穴位敷贴可升高运动后4 min机体血乳酸（P〈0.05）和血氨浓度（P〈0.05）,降低运动后20 min机体血乳酸（P〈0.05）及血氨浓度（P〈0.05）,显著提高受试者8 00 m跑成绩（P〈0.01）。结论：穴位敷贴可减轻运动员的主观疲劳感觉,缓解运动员因运动疲劳而产生的消极情绪,促进运动员机体内血乳酸和血氨的代谢,提高运动员耐缺氧能力,进而缓解运动性疲劳临床症状,促进运动性疲劳的恢复,提高运动成绩。     

Safety impact of piled municipal solid waste dumps in the Three Gorges Reservoir Region on water quality

The safety of water quality in the Three Gorges Reservoir(TGR)is very important.Protections and remediation of environment safety are very crucial for guaranteeing TGR environmental quality.When piled municipal solid waste(MSW) dumps are submerged without treatment,pollutants in the MSW will leach into the water and threaten the water safety of the reservoir.Based on the surveys of the amount,distribution and characteristics of piled MSW in the TGR area,this study focusing on the MSW dumps at the water leve...     

Urea production during prolonged swimming

Male interscholastic swimmers (n = 8) completed a 4572 m training swim in 62 ±1.1 min (x ± s.e.) with terminal heart rate and blood lactate of 152 ± 6 beats min^‐1 and 6.9±0.89 mM, respectively. Sweat rate (0.48±0.0951. h^‐1) was lower than similar intensity cycling (1.5±0.13 1. h^‐1) or running (1.1 ± 0.14 l.h^‐1). Post‐swim serum urea N (11.6±0.71 mM) was elevated (P<0.05) vs pre‐swim (4.6±0.39 mM). Post‐swim urine volume (860±75 ml 24 h^‐1) was reduced (P<0.07) and resulted in an elevated (P<0.05), but delayed (24–84 h), post‐exercise urea N excretion. Although the reduced urine and sweat production during the swim undoubtedly contributed to the elevated serum urea, there must be another explanation because together they could only account for 38% of the observed increase. On the basis of the magnitude of serum urea increase, it appears that the swim caused an increase in urea production (amino acid oxidation). The failure to observe larger increases in urinary urea during recovery indicates that either urea excretion following exercise continues for prolonged periods of time (>48 h) or another significant mode of nitrogen excretion exists.