Floral/fruity scents have long been characterized as attractive to mosquitoes, so it's natural that New Mexico State’s Molecular Vector Physiology Lab researcher Stacy Rodriguez tested a floral/fruity perfume against DEET in a lab trial.
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Urine is golden so it must have some link to gold, thought medieval alchemists seeking to devise methods to transmute base metal into gold.
Not quite, but they did discover that pee is rich with the miraculous bearer of light, aka phosphorus. (American Chemical Society)
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A cool addition to my growing cabinet of curiosities.
The Royal Institution posted this demonstration of an explosively unstable substance called nitrogen triiodide. I love the purple smoke it makes.
Nitrogen triiodide is so unstable that even something like a mosquito landing on it can set it off. Three iodine atoms cluster around one side of a nitrogen atom. Being crowded around one end causes something called bond strain as the atoms repel each other in a small space. The result is that the molecule is prone to falling apart, explosively.
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Ever since I blew my mind by cold-brewing ground cacao nibs, I've been experimenting with the process, and have discovered some amazing variations on the formula.
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"Hydrofluoric acid is probably the most feared chemical compound that there is," says Sir Martyn Poliakoff, a chemistry professor at the University if Nottingham. "The reason it's so feared is that it is very corrosive. It will burn through human skin, even quite a small exposure on your skin can cause a heart attack."
Hydrofluoric acid will also burn through glass. Naturally, the first thing you should do once you obtain some is immerse a lit incandescent bulb into a beaker of it. Read the rest
demonstrates an interesting phenomenon: supercooled sugarcubes briefly glow green when exposed to UV light. Don't tell Insane Clown Posse
about this baffling miracle. Read the rest
In 2009, Theodore Gray blew minds with his gorgeously photographed book, The Elements: A Visual Exploration of Every Known Atom in the Universe, which sold over a million copies. Five years later, Gray has created this book, which describes what happens when elements are snapped together to make molecules, and the result is a masterpiece (thanks in no small part to Nick Mann’s drool-inducing photographs). Gray organizes the book by categories of molecules — inorganic, organic, acids, bases, soaps, solvents, oils, sweeteners, and other common substances — highlighting their similarities and differences. Suddenly, the physical world makes a lot more sense.
Molecules: The Elements and the Architecture of Everything
by Theodore Gray (Author), Nick Mann (Photographer)
2014, 240 pages, 10.25 x 9.5 x 1 inches, Hardcover
Take a look at other beautiful paper books at Wink. And sign up for the Wink newsletter to get all the reviews and photos delivered once a week.
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Written by three science instructors, The Chemistry of Alchemy: From Dragon's Blood to Donkey Dung, How Chemistry Was Forged" is a combination weird science history and DIY projects book. Read the rest
These young folks have a lot of fun throwing a big hunk of sodium into a pond. If you're impatient, forward to the boom at :53. Read the rest
Our best wishes and deep respect to psychedelic pioneer and maverick chemist Alexander "Sasha" Shulgin who is preparing for his final trip on Earth; he is "surrounded by love and a lot of laughter," his wife and research partner Ann Shulgin posted on Facebook: Read the rest
Stanford bioengineer Manu Prakash and his colleagues devised a $5 "chemistry set" that can be programmed to mix various reactants by punching holes in a paper tape and feeding it through the handheld device. Prakash says he was inspired by a hand-cranked music box. This latest device for what Prakash calls "frugal science" is on the heels of his amazing 50-cent folding microscope that I blogged previously.
"Music box inspires a chemistry set for kids and scientists in developing countries" (SCOPE) Read the rest
Sheryl Canter's post on the science of cast-iron pan seasoning is a fascinating and practical tale of flaxseed and kitchen chemistry. It's a long process -- you need to season the pan six or so times, each time taking a couple of hours -- but the science is sound and the proof is in the hard, nonstick coating your pan will have when you're done.
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The bad news: Massive piles of pig manure are foaming up and then exploding
and nobody is really sure why. The worse news: The only solution (other than, you know, not raising so many pigs all together) is to feed the pigs more antibiotics — a practice that contributes to antibiotic resistance. Read the rest
Because puppies are filled with love ... and also hydrogen sulfide
. Read the rest
Mother Jones has an interesting story about several start-ups trying to create fake meat, dairy, and eggs
that are not only sustainable, but appetizing ... even to people who aren't already committed vegans. It's a story about business and ethics, but it's also a story about chemistry and food engineering. As a meat eater who does enjoy seitan, I'm intrigued. Read the rest
Last week, a Swiss investigation found evidence to support the idea that Yasser Arafat was poisoned with polonium-210 — a radioactive element that's safe to carry around in a container, but causes unstoppable death if swallowed. NPR sat down with Deborah Blum, a science writer who specializes in the chemistry of poisonings, to talk about what makes polonium-210 a particularly handy way to off somebody
and why it's so hard to bring a polonium poisoner to justice. Read the rest