Determination of concentrated hydrogen peroxide at single-walled carbon nanohorn paste electrode

Single-walled carbon nanohorn (SWCNH) paste electrode was used for amperometric determination of concentrated hydrogen peroxide, and was compared with other carbon electrodes. The calibration plots are linear from 0.5 to 100 mM at activated SWCNH paste electrode and edge plane graphite (EPG) electrode. In contrast, the calibration plots are linear only at concentrations lower than 45 mM at graphite paste electrode, multi-walled carbon nanotube paste electrode, and glassy carbon electrode.

藏羚寄生蠕虫卵粪检调查初报

2004年12月25日-2005年1月5日对位于青藏公路楚玛尔河大桥附近集群的藏羚（Pantholops hodgsoni），随机拣取其新鲜粪便共计36份带回实验室。利用漂浮法、沉淀法对粪样进行寄生虫蠕虫卵检查，结果显示，粪样中存在有细颈属（Nematodirus）、马歇尔属（Marshallagia）线虫卵和莫尼茨属（Moniezia）绦虫卵，其感染率在19．4％-94．4％之间，感染强度（EPG）分别为5．58、5．11和2．86。结果表明，冬季藏羚的寄生蠕虫感染率高，但感染种类少和感染强度低。