A satellite-tagged great white shark called Lydia is about to make history as the first of its species to be seen crossing from one side of the Atlantic to the other. Lydia was first tagged off Florida as part of the Ocearch scientific project. She is currently swimming above the mid-Atlantic ridge in the center of the Atlantic…
Read about it on BBC News
westerners are obsessed with the idea of happiness as if it’s a constant state of being. happiness comes in moments. you dont “achieve” happiness. you experience it along with every other emotion on the spectrum. if you spend your life chasing this constructed idea of happiness you will never even be remotely content. work on being whole and feeling everything while increasing the happy moments. stop trying to be a “happy person.” just be a person.
shinhyyee asked: Do you know why linseed oil fluoresces under UV light?
The fluorescence occurs because electrons within molecules in the linseed oil are ‘excited’ to higher energy states by absorbing energy from the UV light. This excited state is temporary, and when the electrons return to their original energy state, they release energy in the form of light as they do so. This light is usually at a longer wavelength than the energy absorbed - hence why we see it in the visible spectrum, as fluorescence. The diagram below, from this page, illustrates this:
As for the specific compound responsible for this fluorescence, I have to admit I’ve drawn a blank. The major compounds in linseed oil are fatty acids, and I suppose it’s possible that one of these could be the culprit, but that’s a bit of a stab in the dark. Any other chemists out there who just so happen to be experts in linseed oil fluorescence? :)