Artificial photosynthesis hits record speed
Swedish researchers say they've built a molecular catalyzer that can oxidize water to oxygen very quickly - reaching speeds not far off those of natural photosynthesis. While artificial photosynthesis has been under development for 30 years, it's the first time that such a conversion rate has been reached - about 300 turnovers per second, compared with 100 to 400 for natural photosynthesis. "Speed has been the main problem, the bottleneck, when it comes to creating perfect artificial photosynthesis," says Licheng Sun, professor of organic chemistry at the Royal Institute of Technology (KTH). "This is clearly a world record, and a breakthrough regarding a molecular catalyzer in artificial photosynthesis." The result, he says, could make it possible in the future to create large-scale facilities for producing hydrogen in the Sahara, or combine the technique with traditional solar cells. The team plans to continue working to try and drive down the price of the technology.
Usenet Physics FAQ
Version Date: August 2013 This list of answers to frequently asked questions in physics was created by Scott Chase in 1992. Its purpose was to provide good answers to questions that had been discussed often in the sci.physics and related Internet news groups. The articles in this FAQ are based on those discussions and on information from good reference sources. Most of the entries that you'll find here were written in the days when the Internet was brand new. So because of their age, the FAQ entries that you'll find here have a great deal of academic credibility—but they are not always perfect and complete. This document is copyright. General Physics Particle and Nuclear Physics Quantum Physics Relativity and Cosmology Speed of Light Special Relativity General Relativity and Cosmology Black Holes Reference Topics There are many other places where you may find answers to your question. This FAQ is currently available from these web sites: Australia:
Body's Defenses Made Mightier by Microbes, Study Says
<br/><a href=" US News</a> | <a href=" Business News</a> Copy When it comes to bacteria, many people have a pretty simple view: Germs are bad, and our lives should be as free of them as possible. But an alternate idea suggests just the opposite: Germs are a necessary part of a healthy immune system, helping our body's defenses beef up and fight future illnesses. The idea is called the hygiene hypothesis. But a new study from researchers at Brigham and Women's Hospital in Boston has changed that. Researchers studied two kinds of mice: One group had been exposed to a normal bacteria environment, and another group that was germ-free. Additionally, the germ-free mice had exaggerated inflammation in their lungs and colon, similar to what is seen in humans who have asthma and ulcerative colitis. But all was not lost for the germ-free mice. The results were published today in the journal Science. Dr.
Wave Bubble
Two Wavebubbles. Left is an earlier revision with the top removed and with external antennas. Right is v1.0 with internal antennas, fit into a pack of cigarettes. This website details the design and construction Wave Bubble: a self-tuning, wide-bandwidth portable RF jammer. An internal lithium-ion battery provides up to 2 hours of jamming (two bands, such as cell) or 4 hours (single band, such as cordless phone, GPS, WiFi, bluetooth, etc). Output power is .1W (high bands) and .3W (low bands). Self-tuning is provided via dual PLL, therefore, no spectrum analyzer is necessary to build this jammer and a single Wave Bubble can jam many different frequency bands - unlike any other design currently available! While the documentation here is both accurate and complete (as much as possible), the construction of such a device is still an advanced project. This design is not for sale or available as a kit and never will be due to FCC regulations.
Learn to Be a SPY! Tactics and Training... « Hard To Find Software
Check out these spy training E-Books! Great resources on how to incorporate real spy tactics to improve your own invisibility and privacy in a world that is going the other way. COUNTER SURVEILLANCE: CLEANING RUNS- Advanced Security Tradecraft. This in the only book (or eBook) you will find that teaches you how to do a professional Cleaning Run! This eBook explains the art of the Cleaning Run, which is a very advanced form of Counter Surveillance used extensively by KGB agents and still taught by all top agencies today. SAFE HOUSES- Advanced Security Tradecraft. These are just two of the ebooks offered, there are many more on several very important spy and surveillance techniques. check them out today by clicking on the learn more button!
How to Install Android on Your iPhone
(Editor's note: David Wang is an accomplished iPhone hacker and member of the iPhone Dev Team. Tinker with your gadgets at your own peril--we're not responsible for what happens if you brick your iPhone, however unlikely that may be.) Maybe you want to liberate your iPhone from Apple's clutches. Maybe you just want to tinker with something new. Either way, you've seen Android running on the iPhone, and you want to try it for yourself. Still a Work in Progress Although this port does everything that you expect your smartphone to be able to do, it isn't usable for day-to-day activities just yet--I haven't implemented any power-management functions, so a fully charged iPhone running Android will last only an hour or so. A few bugs and performance issues remain, too, so while the phone will be usable, it won't be fast. Finally, media syncing is not working, so loading your media onto your phone is kind of a pain. Required Reading What You Need 1. 2. 3. 4. 5.
