Chemistry

Scientists Close In On The 50 Year Mystery Of DEET

Fifty years have passed since the United States Department of Agriculture and the U.S. Army invented DEET to protect soldiers from disease-transmitting insects and in the process made civilian life outdoors nicer as well. Despite its effectiveness, and dec ...

Article - News Staff - Mar 14 2008 - 12:22am

Making Greener Fireworks

It may be only St. Patrick's Day but it's never too early to think about July 4th fireworks. Plus, 'green' has two meanings today. Most kids love fireworks. They make pretty colors and loud noises- but they're not terribily friendl ...

Article - News Staff - Mar 17 2008 - 10:44am

Blame Chemistry For Delayed Evolution Of Animal Life On Earth

Scientists have reconstructed changes in Earth’s ancient ocean chemistry from about 2.5 to 0.5 billion years ago and say that a deficiency of oxygen and the heavy metal molybdenum in the ancient deep ocean may have delayed the evolution of animal life on E ...

Article - News Staff - Mar 26 2008 - 1:38pm

Amino Acetonitrile- New Organic Molecule In Space

The "Large Molecule Heimat" is a very dense, hot gas clump within the star forming region Sagittarius B2. In this source of only 0,3 light-year diameter, which is heated by a deeply embedded newly formed star, most of the interstellar molecules k ...

Article - News Staff - Mar 26 2008 - 5:20pm

'Programmed' Oligonucleotides Organize Themselves Into Dodecahedra- Yes, It's A DNA Softball

DNA, the stuff our genes are made of, is the building material of choice for nanoscale objects. A team led by Günter von Kiedrowski at the Ruhr University in Bochum has now made a dodecahedron (a geometric shape with twelve surfaces) from DNA building bloc ...

Article - News Staff - Apr 1 2008 - 11:46am

Heavy Water, Molecular Evolution And Life On Our Planet

Heavy water is water (H2O) in which oxygen is bound to atoms of the hydrogen isotope deuterium (2H). Heavy water is so named because it is significantly more dense (> 1.1 g/cm3) than ordinary ("light") water, 1H2O (1 gm/cm3). Heavy water is no ...

Article - Oleg Mosin - Apr 2 2008 - 2:11pm

The Forensics Problem Of "Green" Gun Ammunition Has Been Solved- Study

Green is in. Even the army is making sure to use environmentally friendly paint on its bombers and environmentally conscious people who have made great efforts to put ethical bullets into mainstream use will be happy that their lead-free status will no lon ...

Article - News Staff - Apr 6 2008 - 9:50pm

Hiigh-Frequency Microcoolers Boost Electronic Component Performance

Electronics work better under cold conditions (-150 C). With less thermal noise, detectors are more sensitive and speed and reliability are increased. Low-noise amplifiers reduce noise further. Dutch-sponsored researcher Srinivas Vanapalli has investigated ...

Article - News Staff - Apr 12 2008 - 10:05am

Magnetite-Producing Bacteria Inspire Magnetic Nanoparticles

Even in new designs, it's not a bad idea to see how old Mother Nature does it. Using that principle, a group of researchers at the U.S. Department of Energy’s Ames Laboratory is mimicking bacteria to synthesize magnetic nanoparticles that could be use ...

Article - News Staff - Apr 14 2008 - 12:10pm

Tunable Metamaterials Open Terahertz Frequencies To Many Applications

A frequency-agile metamaterial that for the first time can be tuned over a range of frequencies in the so-called “terahertz gap” has been engineered by a team of researchers from Boston College, Los Alamos National Laboratory and Boston University. The tea ...

Article - News Staff - Apr 15 2008 - 9:24pm