急性肾功能衰竭家兔心肌损伤的体液机制

目的：观察急性肾功能衰竭（ARF）家兔心肌匀浆自由基、一氧化氮的变化，探讨心肌损伤的体液机制。方法：60只家兔均分为四组（n=15）。ARF模型1组：皮下注射1％HgCl2（1．3ml／kg．bw）；ARF模型2组：肌肉注射50％甘油（10ml／kg．bw）；以等量生理盐水代替HgCl2和甘油作为对照1、2组。24h后，所有动物颈总动脉放血备检，并选择固定位置。制备10％心肌匀浆。经Aeroset型全自动生化分析仪测定血清反映肾功能的生化指标。检测心肌匀浆丙二醛（MDA）、超氧化物歧化酶（SOD）、一氧化氮（NO）及其合酶（NOS）的变化。结果：与相应对照组比较，ARF模型1、2组心匀浆SOD活性下降、MDA含量升高（P〈0．05），ARF模型1、2组心匀浆NO含量增强、NOS及iNOS活性增强（P〈0．05～0．01）。结论：ARF家兔心肌损伤的机制与自由基损伤及NO升高有关。     

Catalytic properties of CuO/Sn0.9Ti0.1O2 and CuO/Sn0.7Ti0.3O2 in NO＋CO reaction

Using SnxTi1-xO2 as carriers, CuO/Sn0.9Ti0.1O2 and CuO/Sn0.7Ti0.3O2 catalysts with different loading amounts of copper oxide (CuO) were prepared by an impregnation method. The catalytic properties of CuO/Sn0.9Ti0.1O2 and CuO/Sn0.7Ti0.3O2 were examined using a microreactor-gas chromatography (GC) NO CO reaction system and the methods of BET (Brun- auer-Emmett-Teller), TG-DTA (themogravimetric and differential thermal analysis), X-ray diffraction (XRD) and H2-temperature programmed reduction (TPR). The results showed that NO conversions of Sn0.9Ti0.1O2 and Sn0.7Ti0.3O2 were 47.2% and 43.6% respectively, which increased to 95.3% and 90.9% at 6 wt% CuO loading. However, further increase in CuO loading caused a decrease in the catalytic activity. The nitrogen adsorption-desorption isotherm and pore-size distribution curve of Sn0.9Ti0.1O2 and Sn0.7Ti0.3O2 represented type IV of the BDDT (Brunauer, Deming, Deming and Teller) system and a typical mesoporous sample. There were two CuO diffraction peaks (2θ 35.5° and 38.7°), and the diffraction peak areas increased with increasing CuO loading. TPR analysis also detected three peaks (α, β and γ) from the CuO-loaded catalysts, suggesting that the α peak was the reduction of the highly dispersed copper oxide, the β peak was the reduction of the isolated copper oxide, and the γ peak was the reduction of crystal phase copper oxide. In addition, a fourth peak (δ) of the catalysts meant that the SnxTi1-xO2 mixed oxides could be reductive.     

《三国志》连动式及修饰成分的语义指向

目前语法学界对语义指向的研究主要集中在单核句法结构中语义指向的分析,而连动式这种多核句法结构中语义指向的研究尚不多见。文章以《三国志》连动句为语料,对句中动词及修饰成分的语义指向进行考察,以揭示连动式内部的深层语义关系;并由此论及语义指向分析在连动句研究中的作用。     

试析“不X不Y”格式

本文从描写语言事实入手，按“小三角”的研究思路，从结构成分，语义类型，语用价值三个角度对“不X不Y”结构，作了较全面的考察，从结构成分来看，能够嵌入“不X不Y”结构的“X、Y”一般是单音节，也有双音节乃至多音节，“不X不Y”结构构成两个停顿，两个停顿前后之前表并列，表因果或表假设关系。     

太极剑锻炼对动脉粥样硬化患者NO及血脂的影响

通过对动脉粥样硬化患者太极剑锻炼前后一氧化氮(NO)及血脂各项指标的测试,探讨太极剑锻炼对动脉粥样硬化老年患者的影响。结果显示,经过一年半的太极剑锻炼,可以明显改善动脉粥样硬化患者的血脂;提高患者体内一氧化氮(NO)的含量。研究表明,太极剑锻炼延缓动脉粥样硬化病变的形成,对于动脉粥样硬化的预防和治疗具有积极意义。     

我国自嘲杂赋的源头

西汉东方朔的《答客难》,被认为是最早的文人以自嘲方式写的诙谐杂赋,而《答客难》的源头是宋玉《对楚王问》。本文认为,《对楚王问》没有愤世嫉俗之情,没有诙谐解嘲之意,与《答客难》风格迥异。而《荀子》的《为说者曰》以嘲讽的口吻表明孔子之时与荀子之时政治环境的不同,感情异常激动,愤世嫉俗之情溢于言外,形式上是以四言韵语为主的赋体,是自我解嘲这一体文章的直接源头。     

Effects of concentration and freeze-thaw on the first hydration shell structure of Zn2+ ions

To investigate the effects of salt concentration and freeze-thaw （FT） on the first hydration shell of Zn2+ ions in Zn（NO₃）₂ aqueous solutions, extended X-ray absorption fine structure （EXAFS） spectroscopy was used to examine Zn K-edge EXAFS spectra of Zn（NO₃）₂ aqueous solutions with various concentrations before and after FT treatment. The influences of salt concentration and freeze-thaw on the structural parameters of the first hydration shell of Zn2+ ions, including hydration number, Zn-O distance and thermal disorder, were analyzed. The results show that Zn2+ ions have 3.2―6.8 nearest oxygen neighbors with the Zn-O distance being 0.202―0.207 nm. In highly concen-trated solutions, Zn2+ ions are hydrated with four water molecules in a tetrahedral form. The dilution of Zn（NO₃）₂ aqueous solutions increases the number of water molecules in the first hydration shell of Zn2+ ions to six with their octahedral arrangement. Both the hydration number in the first hydration shell of Zn2+ ions and the degree of thermal disorder increase when the FT treatment is operated in Zn（NO₃）₂ aqueous solutions.     

《平民千字课》的现实意义——对编写对外汉语初级教材的几点启示

文章着重分析了《平民千字课》这一教材的编写目的、教材构成及教学对象和教学方法。对这一教材与现今的对外汉语教学初级阶段教材的相似性进行了比较。指出现今的对外汉语教学初级阶段教材的编写可以从选材的实用性、趣味性及教学方法的客观性上加以借鉴。     

校园文化建设的实践与思考

先进的校园文化是学校发展的灵魂,是师生共同追求的一种群体价值观。在校园文化建设中,需要坚持物质文化和精神文化并重。精神文化是校园文化的核心、主体、基础,是内涵的,校园文化建设要突出精神文化。     

谈小说《人生》的爱情悲剧

路遥小说《人生》中,主人公高加林与刘巧珍和黄亚萍的爱情,从结果来看都是悲剧。高加林与刘巧珍爱情悲剧产生的原因,是文化上的差异和环境的变化。高加林与黄亚萍爱情悲剧产生的原因是城乡之间的差异。