Excitation and interrogation of whispering-gallery modes in optical microresonators using a single fused-tapered fiber tip.

We show that whispering-gallery modes (WGMs) in optical microresonators can be excited and detected using a fused-tapered fiber tip (FTFT). The fabrication of FTFTs is simple and inexpensive; they are robust and allow the excitation and interrogation of the resonances with a single fiber. Excitation of high-Q WGMs in silica microcylinders and microspheres is demonstrated.

Effect of ethanol and isopropanol on the activity of alcohol dehydrogenase, viability and life-span in Drosophila melanogaster and Drosophila funebris.

The effects caused by the addition of 2 alcohols to the culture medium of 2 species of Drosophila, D. melanogaster and D. funebris, are compared. Ethanol at 1% concentration causes slight and tolerable changes in both species. 1% isopropanol is lethal in 1 species and causes drastic changes in the other.