Category Archives: Chemistry

January 13, 2015 // Paul Buckley Chemistry Professor Linda Nazar and her research team at the Faculty of Science at the University of Waterloo claim to have discovered a material that maintains a rechargeable sulphur cathode which overcomes a hurdle to building a lithium-sulphur (Li-S) battery. Page 1 of 2 The proposed lithium-sulphur battery technology, which is reported in ecent issue of Nature Communications, can theoretically power an electric car three times further than current lithium-ion batteries for the same weight at much lower cost. This is a major step forward and brings the lithium-sulphur battery one step closer to reality, said Nazar, who also holds the Canada Research Chair in Solid State Energy Materials. In theory, sulphur can provide a competitive cathode material to lithium cobalt oxide in current lithium-ion cells. Sulphur as a battery material is abundant, relatively light, and cheap. However, the sulphur cathode exhausts itself after only a few cycles because the sulphur dissolves into the electrolyte solution as its reduced by incoming electrons to form polysulphides. Nazars group originally thought that porous carbons or graphenes could stabilize the polysulphides by physically trapping them. But in an unexpected twist, they discovered metal oxides could be the … Continue reading →

2 hours ago Credit: NASA/Roscosmos Resembling an action-hero power source, this is actually a Russian experiment that was run on the International Space Station. Polymers are repeated molecules that form many materials we use every day, such as rubber and nylon. Rubber is a natural polymer but polymers can also be created synthetically using chemical reactions to string together monomers into new structures. In the weightlessness of space, these reactions can be tailored to create polymer walls that form shells. The experiment demonstrates this method of creating polymers in space as well as improving computer models and offering a striking illustration of physics and chemistry in action for educational purposes. The experiment is being run in a contained glovebox and features two hardening processes to 'set' the end structures. Explore further: It looks like rubber but isn't The experimental and numerical study of the behaviour of polymers in concentrated solutions is a line of research that is still highly active. In the past, it enabled us to understand why materials like rubber ... (Phys.org) A team of researchers made up materials scientists and chemists from several institutions in California has developed a new group of polymers that can be caused … Continue reading →

Substitute video - Moonlight Chemistry (Jeff Bernat) Contact pour ralisation @ : madiama.david@gmail.com | FB : David MaD Madiama | BBM : 7F2A092D. By: Madiama.Dvido … Continue reading →

Anaheim HS Senior Year - Chemistry 4th Period: Free Day S'mores [Originally recorded on: December 19, 2014] We had a free day for 4th period some people were making s'mores since we were told we were able to. By: VGD101 … Continue reading →

Chemistry 51B: Organic Chemistry. Lecture 1 Recorded on January 5, 2014. By: UCIrvineOCW … Continue reading →

Atoms and Molecules Chemistry Class IX CBSE, ICSE, NCERT atoms its very easy. By: HRUTHIKGOWDA K N … Continue reading →

Jan. 9, 2015: President Barack Obama speaks at Pellissippi State Community College in Knoxville, Tenn., about new initiatives to help more Americans go to college and get the skills they need to succeed. (AP) WASHINGTON He hardly ever calls. When he does, it's all business. And that's President Barack Obama's vibe with top Democrats on Capitol Hill. With Republicans, there's even less chemistry. But GOP congressional leaders don't show much inclination to buddy up to the president, either. When the president sits down with eight top legislators -- four from each party -- at the White House on Tuesday, there's little expectation it will usher in a new era of comity and cooperation. Republican leaders will head to the White House already peeved with the president for his recent veto threats and go-it-alone policy moves. Democratic leaders, now in the minority party in both chambers, will find themselves less relevant. - Jim Manley, a former aide to Senate Democratic leader Harry Reid of Nevada The White House is waving off any notion that the meeting is the start of a new congressional charm offensive. "For anyone craning to hear the conversation through the walls, I wouldn't expect a lot of … Continue reading →

WASHINGTON - He hardly ever calls. When he does, it's all business. And that's President Barack Obama's vibe with top Democrats on Capitol Hill. With Republicans, there's even less chemistry. But GOP congressional leaders don't show much inclination to buddy up to the president, either. When the president sits down with eight top legislators -- four from each party -- at the White House on Tuesday, there's little expectation it will usher in a new era of comity and cooperation. Republican leaders will head to the White House already peeved with the president for his recent veto threats and go-it-alone policy moves. Democratic leaders, now in the minority party in both chambers, will find themselves less relevant. The White House is waving off any notion that the meeting is the start of a new congressional charm offensive. "For anyone craning to hear the conversation through the walls, I wouldn't expect a lot of laughter," says Jim Manley, a former aide to Senate Democratic leader Harry Reid of Nevada. "It's not the funniest group of people you've ever put together." Three thoughts on how Obama gets along with top Republicans and Democrats in Congress, and how much it matters. ------ Read … Continue reading →

Four Facts About Sweat - Speaking of Chemistry Ep. 13 Subscribe! http://bit.ly/CENOnline New Year's means drinking champagne, watching the ball drop, and making resolutions to get fit. Getting fit inevitably mea... By: CEN Online … Continue reading →

Lecture by the only female Nobel Laureate in Chemistry Ada Yonath (Malta VI Conference) Lecture titled: "Mid-East Regional Collaboration for Investigating Cellular Molecular Machines" By: Malta Conferences Foundation … Continue reading →