chemical reactions

Cardiff University: National Science and Engineering Week

seher — Sat, 01 Mar 2008 12:29:40 -0600

Chemistry will be brought to life in an interactive show designed to make members of the public and schoolchildren aware of the importance of the subject in everyday life.

Nanoreactors for reaction cascades

harminka — Tue, 21 Aug 2007 05:37:03 -0500

Living cells are highly complex synthetic machines: Numerous multistep reactions run simultaneously side by side and with unbelievable efficiency and specificity. For these mainly enzymatic reactions to work so well collectively, nature makes use of a variety of concepts.

Researchers describe new way to identify, evolve novel enzymes

harminka — Thu, 16 Aug 2007 06:27:50 -0500

The intricate interplay of proteins and other chemicals that underlies most biological activities requires the participation of enzymes, specialized molecules that accelerate chemical reactions between molecules.

Quantum analog of Ulam's conjecture can guide molecules, reactions

harminka — Tue, 07 Aug 2007 11:40:28 -0500

Like navigating spacecraft through the solar system by means of gravity and small propulsive bursts, researchers can guide atoms, molecules and chemical reactions by utilizing the forces that bind nuclei and electrons into molecules (analogous to gravity) and by using light for propulsion.

Porphyrin electron-transfer reactions observed

harminka — Sat, 04 Aug 2007 06:08:45 -0500

Researchers at Temple University have observed and documented electron transfer reactions on an electrode surface at the single molecule level for the first time, a discovery which could have future relevance to areas such as molecular electronics, electrochemistry, biology, catalysis, information storage, and solar energy conversion.

New light cast on key chemical reactions in interstellar space

harminka — Thu, 12 Jul 2007 07:23:42 -0500

A detailed understanding of key chemical reactions that take place in interstellar space has been provided by groundbreaking research at two U.S. Department of Energy national laboratories and two European universities.

Researchers prove existence of new type of electron wave

harminka — Thu, 05 Jul 2007 02:53:05 -0500

New research led by University of New Hampshire physicists has proved the existence of a new type of electron wave on metal surfaces: the acoustic surface plasmon, which will have implications for developments in nano-optics, high-temperature superconductors, and the fundamental understanding of chemical reactions on surfaces.

Measuring self-assembly in action

harminka — Fri, 22 Jun 2007 08:44:06 -0500

By making careful observations of the growth of a layer of molecules as they gradually cover the surface of a small silicon rectangle, researchers from the National Institute of Standards and Technology (NIST) and North Carolina State University (NCSU) have gained basic insights into how self-propagating self-assembly wave fronts develop and have produced the first experimental verification of recently improved theoretical models of such systems.

Mechanoluminescence event yields novel emissions, reactions

harminka — Wed, 09 May 2007 08:33:29 -0500

Researchers at the University of Illinois report that a new study of mechanoluminescence revealed extensive atomic and molecular spectral emission not previously seen in a mechanoluminescence event. The findings, which appear online this month in the Journal of the American Chemical Society, also include the first report of gas phase chemical reactions resulting from a mechanoluminescence event.

Scientists film proteins at work by freezing them in different states

harminka — Fri, 20 Apr 2007 07:39:45 -0500

Most of the research done on proteins is based on their study in a resting state and their study in movement is extremely limited due to technological limitations. Today, a French team has made a movie of an enzyme (a protein that catalyses chemical reactions) found in bacteria.

High-pressure chemistry in ultra small pressure cooker

harminka — Sat, 14 Apr 2007 12:49:07 -0500

Small, clever process technology is essential for the future, but is it possible? Dutch-sponsored researcher Fernando Benito LÃƒÂ³pez investigated the possibilities of the so-called lab-on-a-chip: microreactor chips in which chemical reactions can take place under (high) pressure.

Giving platinum catalysts golden boost for fuel cells

harminka — Wed, 28 Mar 2007 03:30:08 -0500

Platinum might outweigh gold in the jewelry market, but as part of an ongoing effort to produce efficient and affordable fuel cells, scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory are studying how gold atoms might enhance the value of the pricier metal.