高铁闪锌矿精矿的氨浸工艺

在25℃、氧分压为600kPa、固液比为1：7的条件下，以碳铵-氨水-双氧水-催化剂体系氧化浸泡高铁硫化锌精矿8h，锌、铜、镉的浸出率分别可以达到97％、98％、95％，而铁浸取率在0．5％以下．     

金属氧化与氨反应的热力学讨论

西文有和热力学方法讨论了金属氧化物和氨发生氧化还原反应的情况，同时对常见金属氧化物与氨反应的可能性和趋势作了分析。     

浅谈病理性氨基酸尿症

对病理性氨基酸尿症的病因进行了综合性分析。特别是遗传因素造成的氨基酸代谢缺陷。临床上已分为二十多种类型。因参与氨基酸代谢的某些酶缺陷引起代谢物在血液中异常增高，使尿中排泄增多，由于代谢异常引起婴幼儿发育严重障碍，甚至有种种神经系统及重要脏器功能紊乱的表现以至于早年夭折。如苯丙酮酸尿症。有些虽无明显症状．仅在进食有代谢缺陷的氨基酸丰富的食品，才会出现明显症状。限制饮食即可减轻。要到青壮年后才发病，对患者健康的威胁也不明显．易被忽视。目前对该病的预防治疗已引起广泛的关注。     

Evaluation of spatial and vertical variability of nitrogen and phosphorus in sewage-irrigated soil in Tongliao, China

The reuse of wastewater for the irrigation of farmlands is gaining popularity, and the nutrient leaching associated with wastewater irrigation is becoming a matter of concern. The variability of nitrogen and phosphorus fractions in wastewater-irrigated soil was investigated in both horizontal and vertical directions in Kongjiaxiang, Tongliao, Inner Mongolia, China. The results showed that wastewater irrigation resulted in the concentrations of available N and P being 40.36% and 66.49% higher, respectively, than those with groundwater irrigation. Different forms of N and P exhibited significantly different distribution patterns. Higher concentrations of NO3- and total available N, as well as of those of Ca-P and total available P were observed near wastewater irrigation channels. Ca-P has a spatial distribution pattern similar to that of available P. The concentrations of NO3- and NH4+ were the highest in top soil and decreased with depth. The complex interactions between nitrate leaching and nitrogen transformation processes (e.g., nitrification, denitrification, and mineralization) determined the vertical profile of NO3- . The significant amount of NH4+ loss inhibited its deep seepage. The Ca-bound compound contained more P than other inorganic fractions as a result of high Ca levels throughout the soil profile. The differences in the concentrations of Ca-bound P at different depths could be due to the upward flux or translocation of Ca from subsurface to surface soil and the sequestration of P.     

柚子皮膳食纤维提取工艺的研究

通过文献了解现今对于膳食纤维提取的几种基本方法,采用酸、碱法对柚子皮中的膳食纤维进行提取,并用正交试验得到碱浸过程中对于柚子皮膳食纤维提取的最佳条件：温度35℃、时间1.5h、物料比1（g）∶9（mL）、NaOH浓度0.4 mol/L,此条件下产率为51.85％.最后对得到的柚子皮膳食纤维的持水性以及膨胀性进行测定,得出其持水力和膨胀力分别为2.823 g/g、3.19 mL/g.     

Influence of serum adiponectin level and SNP +45 polymorphism of adiponectin gene on myocardial fibrosis

Adiponectin plays an important role in the development of hypertension, atherosclerosis, and cardiomyocyte hypertrophy, but very little was known about the influence of serum adiponectin or the adiponectin gene polymorphism on myocardial fibrosis. Our study investigates the influence of the SNP +45 polymorphism of the adiponectin gene and serum levels of adiponectin on myocardial fibrosis in patients with essential hypertension. A case-control study was conducted on 165 hypertensive patients and 126 normotensive healthy controls. The genotypes of adiponectin gene polymorphisms were detected by the polymerase chain reaction (PCR) method. Serum concentrations of procollagen were measured by a double antibody sandwich enzyme-linked immunosorbent assay (ELISA) in all subjects. The integrated backscatter score (IBS) was measured in the left ventricular myocardium using echocardiography. The serum levels of adiponectin in hypertensive patients were significantly lower than those in the normal control group ((2.69±1.0) μg/ml vs. (4.21±2.89) μg/ml, respectively, P<0.001). The serum levels of type-I procollagen carboxyl end peptide (PICP) and type-III procollagen ammonia cardinal extremity peptide (PIIINP) in the hypertension group were significantly higher than those in the control group. In the hypertension group, serum levels of adiponectin were significantly and negatively related to the average acoustic intensity and corrected acoustic intensity of the myocardium (r=0.46 and 0.61, respectively, P<0.05 for both). The serum levels of PICP and PIIINP were significantly different among the three genotypes of SNP +45 (P<0.01). Logistic regression analyses showed that sex and genotype (GG+GT) were the major risk factors of myocardial fibrosis in hypertensive patients (OR=5.343 and 3.278, respectively, P<0.05). These data suggest that lower levels of adiponectin and SNP +45 polymorphism of the adiponectin gene are likely to play an important role in myocardial fibrosis in hypertensive patients.     

电解法去除高浓度氨氮废水工艺研究

本文采用电解技术对高浓度氨氮废水进行处理研究,考察电化学方法对废水中高浓度氨氮的去除效果,并优化其工艺参数。结果表明,电流密度、Cl^-1浓度、极板对数等均对高浓度氨氮的电解处理效率有直接影响;综合考虑电耗、投加Cl^-1量等经济因素和处理效果,其优化工艺参数为8A电流、NH4^＋与Cl^-1的摩尔比为1：4、2对极板;此条件下氨氮的90m in去除率为81.5%,电耗为63.6度。     

血氨测定在运动人体科学中的应用

总结了近年来运动与血氨水平的相关研究。剧烈运动中，氨主要的来源是单磷酸腺苷的脱氨基，而在次最大强度运动中支链氨基酸的分解占重要地位。比较了血氨与血乳酸对运动的反应；总结了影响血氨水平的各种因素；综述了血氨测定在监测与指导运动训练、间接测定肌纤维成分及肌肉糖原水平中的应用。     

低压氧舱与正常训练运动员血乳酸、血氨比较及分析

利用低压氧舱模拟高原训练,测定在相同运动强度下(800米竭力跑)运动员在不同环境中血乳酸、血氨水平的变化,证明: 低压氧舱训练可提高负荷对身体的刺激强度,加速提高人体机能能力,体内的乳酸、血氨水平明显高于正常训练.结论: 低压氧舱训练有助于提高运动员无氧代谢的能力.     

透视课堂教学中的听、说、看

课堂教学中的说、听、看反映出学生的生存状态、思维方式、精神体验,同时也反映出教育的真正理念、教育对学生的影响。在某种程度上,说、听、看就是学生的生存方式、生存状态。因此,当我们呼吁要关注教育日常生活的时候,要关注学生生命体验的时候,我们的关注点应指向学生“切身”的行动及行动中的感受。