Shocker: Advertising health claims are often misleading. In this case, it looks like most of the products that tout near-perfect germ-killing abilities are getting those results in trials that aren't exactly designed to mimic real-world conditions. When a University of Ottawa microbiologist ran a more realistic demonstration for Canadian schoolchildren, he turned up VERY different results.
Three popular sanitizers killed between 46% and 60% of microbes on the students' hands, far short of 99.99%. Bugs that aren't killed by sanitizers aren't necessarily more dangerous than those that are. But the more that remain, the greater the chance of infection, doctors say.
The ad writers also benefit from regulations that allow them to claim 99.9% effectiveness without actually killing 99.9% of all germs, all the time. Instead, representative samples can stand in, and there's room for do-overs in the lab, if the first test doesn't work.
Wall Street Journal: Kills 99.9% of Germs—Sometimes
Image courtesy Flickr user If you dream it..., via CC
The legendary cup, designed to punish greedy drinkers, explained masterfully by Salad Fingers’ dad Sir Martyn Poliakoff. His YouTube channel is packed with similarly excellent videos wherein lab assistant Neil is persuaded to execute unnerving experiments. (previously.)
A trio of scholars who study the psychology and philosophy of science have written a fantastic paper for Springer’s Sythese looking at the way that climate change conspiracy theorists construct their view of the world, and how these conspiracy theories contain self-contradictory theses (like the idea that climate change can’t be predicted and the idea […]
Princeton University psych prof Susan Fiske published an open letter denouncing the practice of using social media to call out statistical errors in psychology research, describing the people who do this as “terrorists” and arguing that this was toxic because of the structure of social science scholarship, having an outsized effect on careers.
When you’ve had a long day and it’s time to unwind, there’s a lot you can do to relax: drink some tea, take a shower or even read a book. But there’s one thing that’s essential to a comfortable night’s rest—and that’s investing in some really good sheets. Enter Bamboo Bed Sheets. These quality sheets retail for $120, but […]
The Avantree Powerhouse 4 Port Fast USB Charging Station brings high quality, high power, and still keeps your work space or home looking neat and organized. The best part about this charger is its capacity. It comes packing 4 USB charging sockets and a powerful 4.5A/22.5W output.. Its smartport technology means you don’t have to worry about frying your battery, either—it […]
With this comprehensive course in App & Game Development for iOS and Android, you’ll be able to take full advantage of this career opportunity without committing to going back to school full time. You’ll learn how to build immersive, interactive games and apps from start to finish using Python, C#, Unity, and HTML—some of the most in-demand programming […]