caffeine ring | silver pp_lab or a major appointment in

or a major appointment in neuroscience or clinical neurology

and microbiology teaching laboratories

physicians

allowing efficient oxygen uptake into blood and carbon dioxide removal

If you trace a continuous line along the centre of a real Möbius strip

caffeine ring | silver pp_lab or a major appointment inCaffeine ring sterling silver If you cannot read, write, or run a clinic before your second cup, you already know what the ring carries. Caffeine, 1,3,7 trimethylxanthine, the most consumed psychoactive drug on the planet. Worn here as a sterling silver ring in US sizes 5 to 9. The Chemistry of Caffeine Caffeine is 1,3,7 trimethylxanthine, structurally one methyl group more than theobromine (3,7 dimethylxanthine). It was first isolated from coffee