An anonymous reader writes:
D-lysergic acid diethlyamide…what a strange, wonderous, and downright amazing molecule. Having a background in biology, biochemistry, and molecular biology, I have long been fascinated by this enigmatic chemical. I initially planned on getting the regular simple stick molecular structure, and sat on that idea for close to 7 years. One night, fairly recently, a tattoo artist friend mentioned to me over lunch that the “ball and stick” model would look much better…what a simple, yet absolutely brilliant idea of which I have no earthly clue why I didn’t think of first. I had to let him tattoo me! It’s better than I ever could have imagined. The picture was taken within a few hours of completion, and there is tattoo ointment over it, making it glisten and giving the appearance of “spots” on certain atoms.
Carl: Takes the LSD theme up a notch, I’d say.
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MLR writes: “The Tree of Life—carbon, glucose, light, DNA, and the golden rectangle. A tattoo by Kevin Riley. On the chest of a PhD student in molecular biology.”
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Carrie writes:
“I am an immunologist, and a second-generation biologist; my mother was a cell biologist (she passed away from brain cancer, which influenced my choice of career). I find DNA to be elegant; the code is so simple, and yet capable of enormous complexity. So I had my artist make a stylized DNA double-helix for me. The two double-stranded breaks don’t bother me; adaptive immune cells have those as part of normal development. 
“
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Troy writes that he got his tattoo “as a post-doctoral fellow studying protein folding. The tattoo is sort of a telescoping view of the contents in a cell (many contents omitted, obviously). This came about from a very vague idea of something I wanted, and the artist (Chris Adamek, Immortal Ink, Clinton, NJ) really ran with it. He has no scientific training but came up with some really amazing artwork. He was so enthusiastic and wanted to know all about what it all meant and how it works. I enjoyed the experience of sitting with him for three days as much as I enjoy the result. The DNA doesn’t code for anything (at least not intentionally).”
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Jaana writes, “I am a chemist and work on the legislative side of science. I also have a bit of a temper, so when choosing this tattoo, the choice was obvious. Its a modified version of the chemical hazard sign for ‘explosive’ and while hidden under a lab coat most of the time, depicts my personality quite well.”
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Mike writes, “I know that I’m supposed to provide some sort of explanation, but I feel like everyone can probably tell that this is DNA. Every once in awhile someone will ask what’s on my arm, in which case I respond that it’s a futuristic staircase. Then they stare quizzically and I laugh.”
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Abigail writes:
“My first year of college, I wanted to be an English major, and I took Intro Chemistry to fill the science requirement. The brief unit on thermodynamics made me fall totally in love. Entropy made sense to me – scientifically, philosophically. I became a Chemistry major and love every second of it. I got the tattoo to mark my rite of passage – Entropy going both ways, with its symble delta-S in the middle, all supported in the roots of Yggdrasil, the world-tree of Norse mythology (harking back to my English-lit days).”
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A biochemist writes:
“Here is a picture of my science tattoo, which is a stylized structure of glycolipid A, the preformed glycolipid membrane anchor precursor I discovered as a graduate student some 20 years ago. At that time, membrane proteins that were anchored via glycolipids, rather than transmembrane protein domains, had just been found and this was the first precursor to be reported. The structure is simplified but basically correct, although considerable artistic license has been taken with bond lengths and angles.”
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Matthew writes:
“My tattoo is taken from a 1950′s biology textbook. The reason it means so much to me is because of the relevence of the nitrogen cycle to the cycle of life. The horse dies, which feeds the plant, which feeds the horse. Its really quite beautiful.”Carl writes: We are each fleeting intersections of the Earth’s biogeochemical cycles, the paths of nitrogen, carbon, oxygen, and the other elements. The carbon cycle is the most familiar of those cycles today, because we are adjusting its knobs so that more carbon is shooting into the atmosphere than was the case before the Industrial Revolution, trapping heat from the sun. If we were to shut the knob off, atmospheric carbon would slowly subside over hundreds of thousands of years as it flowed further on through the carbon cycle, to the bottom of the ocean and ultimately into the bowels of the Earth.
The nitrogen cycle is important as well, and we are also adjusting its knobs. Today the nitrogen entering the world’s soil is moving at twice its natural rate, thanks to our production of fertilizers and burning of fossil fuels. The nitrogen that gets into streams flows out to the oceans where it triggers runaway explosions of microbes, leading to oxygen-free “dead zones” in places like the Baltic Sea and the Gulf of Mexico. These dead zones would be far bigger if not for the help we get from a hidden part of the nitrogren cycle–bacteria in the soil and banks of streams and rivers. Some of these microbes have the biochemical wherewithal to pull nitrogen out of the water and turn it into molecular nitrogen or nitrous oxygen (N20), which diffuses into the air. But these bacteria cannot turn the knobs all the way back; the more nitrogen they are given, the less efficient they get at converting it. As the world’s population grows and releases more nitrogen, the hidden parts of its cycle may come painfully to light.
[Image via Wikipedia]
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Jen writes: “Out of my interest for Chemistry and my heritage I chose to get his tattoo done almost a year ago. It is on the back of my upper right shoulder and it is a reminder of my philosophy for life “question all objectively.”
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