BACKGROUND The aim of this study was to determine the relationship of the power and recovery stroke of respiratory cilia using digital high speed video imaging. Beat frequency measurements made using digital high speed video were also compared with those obtained using the photomultiplier and modified photodiode techniques. METHOD Ciliated epithelium was obtained by brushing the inferior nasa...

Abstract Photomultiplier tubes (PMTs) are traditionally an integral part of large underground experiments as they measure the light emission from particle interactions within enclosed detection media. The BUTTON experiment will utilise around 100 PMTs to response different media suitable for rare event searches. A subset low-radioactivity 10-inch Hamamatsu R7081 were tested, characterised, and ...