To make red blood cells in the lab, study leader Samir Mitragotri and colleagues started with spheres of biodegradable polymer. They then exposed the spheres to isopropanol, which collapsed them into the discoid shape characteristic of red blood cells. The researchers then layered proteins — either albumin or hemoglobin — onto the doughnut-shaped disks, cross-linked the proteins to give them extra strength and stability, and finally dissolved away the PLGA template to leave only a strong but flexible shell [The Scientist].
Mitragotri’s creations are about 7 microns across—the same diameter as real red bloods cells—and they have the same disc-like shape as their real-world counterparts. They act like real cells, too, he says. “The soft protein shell makes them squishy and elastic,” says Mitragotri. “They can squeeze through capillaries smaller than their own diameter, just like real blood cells” [New Scientist]. And perhaps most impressively, they can carry substances like the real thing does. Mitragotri’s team of researchers experimented with hemoglobin and the anti-blood clotting drug heparin; the synthetic cells could soak up either one and release it later.
The scientists found the DNA code for a skin cancer called melanoma contained more than 30,000 errors almost entirely caused by too much sun exposure.
The lung cancer DNA code had more than 23,000 errors largely triggered by cigarette smoke exposure.
From this, the experts estimate a typical smoker acquires one new mutation for every 15 cigarettes they smoke.
The project uses the Lilypad Arduino platform to control game play, run the display, and communicate between devices. Patches of conductive fabric on the shoulders, hips, and cuffs of the shirts are used to create a serial connection between the Arduinos. An accelerometer attached at the back of the neck allows each player to control their game paddle by rocking their partner back and forth.
Before you comment on safety remember that they are made of cardboard and balsa wood. You can buy them at walmart, they don't have explosives in them, any sharp tips, no metal, and nothing that can hurt anyone.
I made rocket pods for the sides of my '06 CBR that shoot estes rockets with the push of a button. Some of the rockets in the video did not fly very well but I have got the problem under control so watch for another video!!
The plan was to create a series of images that I could work on at home, without giving away too much about the end (folded) result. The images would act both individually and as a series of captured moments of the irrelevant and mundane, utilising street-signs, strange signage and various forms of odd-ball graffiti to spell out the proposal. And naturally, when she'd ask me what I was working on, I could easily say "oh, I'm practising my hand created type because it needs A LOT of practice" and I'd be out of trouble. The hardest trick was working out how I could form the word 'MARRY' because just putting it into an individual image would blow my unique cover.
The Wiimote can track just about anything: All that’s needed is an LED light. Hydrologist Willem Luxemburg of Delft University of Technology in the Netherlands demonstrated a hacked water-level sensor made from a Wiimote and a plastic boat at the meeting of the American Geophysical Union here Monday.
“Just switch it on and make sure it doesn’t get wet,” Luxemburg said.
Luxemburg’s team aimed the Wiimote at a problem that can be very tricky for hydrologists: measuring evaporation on a body of water. The easiest way to measure evaporation is to place pans of water near the lake, or whatever water is being studied, and put pressure sensors in them. The sensors record the drop in pressure as more and more water disappears. But this equipment can run $500 or more, and still the measurements aren’t accurate because the water in the pan gets warmer on land than it would in the lake. Alternatively, measuring the level of water in a pan that is floating in a lake is also tricky because the pan will inevitably be moving.
The Wiimote could overcome the evaporation-measurement problems. It has a tri-axial accelerometer and a high-resolution, high-speed infrared camera, which can sense movement with better than 1 millimeter accuracy.
But such a ring, if it were to suddenly appear, might not be all good news. Decades ago, John O'Keefe of the NASA Goddard Space Flight Center ventured that Earth may have had a ring system similar to Saturn's for a brief period. In a 1980 paper in Nature, O'Keefe pointed to climatic data indicating colder winters at the end of the Eocene epoch some 34 million years ago along with showers of tektites, glassy rocks of mysterious origin, at around the same time. O'Keefe's theory held that tektites that missed the Earth in this bombardment were captured into a ring system that may have persisted for millions of years, casting a winter shadow across Earth's surface and contributing to a late Eocene die-off of many marine organisms such as plankton and mollusks.
So the 29-year-old grabbed hold of his BlackBerry, accessed the internet and sought help from search engine Google for step-by-step instructions.
And after following the detailed guide on the internet's wikiHow Emma safely gave birth to daughter 6lb 11oz Mahalia Merita Angela Smith.
Five minutes after the delivery the midwife arrived to cut the umbilical cord of their fourth child.
