一次性角膜标本采集器的研制

目的:研制一种一次性角膜标本采集器。方法:根据传统角膜标本采集方法与要求进行设计,采集器包含手柄、颈部和头部3部分。结果:整体设计简单新颖,质量小,易操作,能够一次安全采集足量检验标本。结论:一次性角膜标本采集器制作成本低,使用安全,操作简单,取样检出率高,值得推广、使用。

Development of Field Triple Water Purifying Device

Objective To develop a field triple water purifying device to turn the raw water into drinking water. Methods The device, made of polyethylene plastics and stainless steel, used active carbon, quartz sand, low-pressure high-perfor- mance micro filtration membrane and polyimide resin as the purifying material, and foot pump to provide filtration pressure. Such indexes, such as the turbidity, escherichia toll, total bacterial count and COD, were tested for the evaluation of the device.Results The water filtered by the device showed no abnormal stink, no visible materials and no colon bacilli, whose total bacterial count was less than 2 cfu/mL and turbidity was not more than 2 NTU. The experiment monitoring data showed that the removal rate of BOD5 and COD was high. Conclusion The indexes of water quality, bacteriology, turbidity of natural water treated by the device are in accord with the sanitary standard of drinking water for armed forces in wartime, so the water filtered by the device is suitable or safe for drinking.