离子缔合物胶束增敏光度法测定微量汞

研究了在TritonX 100存在下Hg(SCN)42- 与亮绿的显色反应条件,建立了一种吸光光度法测定微量汞的新方法,汞量在(0 5)μg/25 mL范围内符合比尔定律,方法已用于环境水中微量汞的测定,RSD为0.26%~1.39%,回收率为96.6%~100.2%.     

馆藏纸质图书架位合理测算实践——以中山火炬职业技术学院图书馆为例

文章以中山火炬职业技术学院图书馆搬迁为例,介绍了利用ItasⅡ图书馆管理系统导出图书馆所有纸质图书的数据,并对其进行整理、分析,确定新馆藏书的架位情况.该图书馆利用这种馆藏纸质图书架位合理测算方法,对新馆布局进行了合理规划,保证了图书搬迁工作及上架工作顺利完成.     

Hg0 absorption in potassium persulfate solution

The aqueous phase oxidation of gaseous elemental mercury （Hg^0） by potassium persulfate （KPS） catalyzed by Ag^＋ was investigated using a glass bubble column reactor. Concentration of gaseous mercury and potassium persulfate were measured by cold vapor atom absorption （CVAA） and ion chromatograph （IC）, respectively. The effects of pH value, concentration of potassium persulfate and silver nitrate （SN）, temperature, Hg^0 concentration in the reactor inlet and tertiary butanol （TBA）, free radical scavenger, on the removal efficiency of Hg^0 were studied. The results showed that the removal efficiency of Hg^0 increased with increasing concentration of potassium persulfate and silver nitrate, while temperature and TBA were negatively effective. Furthermore, the removal efficiency of Hg^0 was much better in neutral solution than in both acidic and alkaline solution. But the influence of pH was almost eliminated by adding AgNO3. High Hg^0 concentration has positive effect. The possible reaction mechanism of gaseous mercury was also discussed.     

爱的阻力:毕飞宇小说《推拿》中的情爱描写

毕飞宇的长篇小说《推拿》给我们描述了一群盲人推拿师们的日常生活、事业、友情、爱情。作者深入到作品主人公的情感世界,着重描写他们之间的情与爱。但是盲人世界的情爱似乎与正常人有些不同,由于视觉功能的缺乏,他们在爱情的道路上多了些阻力,而作者并不是给他们制造阻力,而是力图解除阻力。本文从几个人物对性的不同态度和尊严的价值这两方面来探讨小说主人公的爱是如何受阻又是如何化解阻力的。