負離子發生器在母嬰同室淨化空氣中的應用研究 PDF

通過新生兒鼻粘膜取樣培養數據的觀察,負離子有抑菌,濾菌作用,是醫院內病室空氣淨化,預防呼吸道感染的有力措施。這不但能夠用於母嬰同室房間。也適用醫院其他各科病室,治療室,手術室,ICU 等房間的空氣淨化與消毒是預防醫院感染,實施空氣淨化,消毒又一新的途徑。

Indoor and outdoor air quality investigation at schools in Hong Kong 2000 PolyU

Indoor CO2 concentrations exceeded the ASHRAE standard due to overcrowded classrooms and inadequate ventilation. Implementation of more breaks and recesses between classes might alleviate the high level of CO2. The occupancy of classrooms in Hong Kong often exceeded the maximum occupancy of the ASHRAE 62-1989 standard. Decreasing the number of students in each classroom can also lower the CO2 level. Increase the rate of ventilation could remove the accumulated CO2; for example, the use of ceiling fans, exhaust fans could increase the exchange of indoor air with the outdoor.

The influence of carbon dioxide on brain activity and metabolism in conscious humans PDF

This study investigated the effect of blood CO2 levels on brain activity from a number of perspectives. We first showed that hypercapnia reduced metabolic activity in the brain. Second, neural activity was assessed indirectly by BOLD fcMRI and the data suggested that CO2 inhalation caused a decrease in spontaneous brain connectivity. Finally, EEG was used as a direct measure of neural activity and the results showed that hypercapnia caused a relative increase in lower frequency power spectra. Overall, our data showed a suppressive effect of CO2 on brain activity.