The Andromeda galaxy, also known as Messier 31 (M31), is the closest spiral galaxy to the Milky Way at a distance of about 2.5 million light-years. Astronomers use Andromeda to understand the ...

Upon illumination with a white light source (6600 ± 990 lux), these polymer samples caused lethal photosensitization of both E. coli and S. aureus in 1 and 4 h, ... TEM image and UV–vis spectrum of ...

The paper provides an overview of a real-time spectrum sensing prototype operating in the TV white space. There has been considerable research on the feasibility of spectrum sensing in the TV white ...

It leaves less of a white cast than most physical sunscreens. ... “Broad spectrum” protection: ... Sun Bum Clear 50 is a light, ...