Chemical reaction
hideA chemical reaction is a process that always results in the interconversion of chemical substances. The substance or substances initially involved in a chemical reaction are called reactants. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles, as well as nuclear reactions. Different chemical reactions are used in combination in chemical synthesis in order to get a desired product. In biochemistry, series of chemical reactions catalyzed by enzymes form metabolic pathways, by which syntheses and decompositions ordinarily impossible in conditions within a cell are performed.
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News tagged with chemical reactions
Why Life Originated (And Why it Continues)
Biology /
Dec 09, 2008 |
4.2 / 5 (169) |
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(PhysOrg.com) -- Today, scientists understand pretty well how life evolves, by mechanisms based on Darwin’s theory of natural selection for survival of the fittest. However, Darwin’s 1859 classic, On the Origin ...
Physicist develops battery using new source of energy
Mar 11, 2009 |
4.7 / 5 (51) |
11
Researchers at the University of Miami and at the Universities of Tokyo and Tohoku, Japan, have been able to prove the existence of a "spin battery," a battery that is "charged" by applying a large magnetic ...
Life on Mars theory boosted by new methane study
Space & Earth / Space Exploration
Dec 08, 2009 |
4.9 / 5 (31) |
11
Scientists have ruled out the possibility that methane is delivered to Mars by meteorites, raising fresh hopes that the gas might be generated by life on the red planet, in research published tomorrow in Earth an ...
Nanoparticles used in common household items caused genetic damage in mice
Nanotechnology / Bio & Medicine
Nov 16, 2009 |
4.8 / 5 (24) |
11
Titanium dioxide (TiO2) nanoparticles, found in everything from cosmetics to sunscreen to paint to vitamins, caused systemic genetic damage in mice, according to a comprehensive study conducted by researchers at UCLA's Jonsson ...
Why leave it to nature? Chemistry professor wants to understand, simplify, photosynthesis
Sep 30, 2009 |
4.6 / 5 (12) |
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(PhysOrg.com) -- Amid calls for transformative change in the world’s energy supply, Harvard chemist Ted Betley is taking a back-to-basics approach and examining the mother of all energy supplies -- photosynthesis ...
New microchip technology performs 1,000 chemical reactions at once
Chemistry / Analytical Chemistry
Aug 03, 2009 |
5 / 5 (11) |
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(PhysOrg.com) -- Flasks, beakers and hot plates may soon be a thing of the past in chemistry labs. Instead of handling a few experiments on a bench top, scientists may simply pop a microchip into a computer ...
A light bulb and a few chemicals: Scientists find a way to help make new reactions
Sep 04, 2008 |
4 / 5 (13) |
0
(PhysOrg.com) -- Princeton scientists have discovered a way of stimulating organic molecules that they expect will prompt researchers to create materials from new kinds of chemical reactions.
'Look Mom No Electricity': Transmitting Information with Chemistry
Chemistry / Analytical Chemistry
Jun 19, 2009 |
4 / 5 (13) |
19
(PhysOrg.com) -- While information technology is generally thought to require electrons or photons for transmitting information, scientists have recently demonstrated a third method of transmission: chemical ...
How water forms where Earth-like planets are born
Dec 17, 2009 |
4.9 / 5 (10) |
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(PhysOrg.com) -- In a study that helps to explain the origins of water on Earth, University of Michigan astronomers have found that water vapor can form spontaneously in habitable zones of solar systems, and that it develops ...
Quantum computers could excel in modeling chemical reactions
Nov 20, 2008 |
4.4 / 5 (10) |
0
Quantum computers would likely outperform conventional computers in simulating chemical reactions involving more than four atoms, according to scientists at Harvard University, the Massachusetts Institute of Technology, and ...
Lab-on-a-Chip Performs 1,000 Chemical Reactions At Once
Chemistry / Analytical Chemistry
Sep 27, 2009 |
4.9 / 5 (7) |
0
Flasks, beakers, and hot plates may soon be a thing of the past in medicinal chemistry labs. Instead of handling a few experiments on a benchtop, scientists may simply pop a microchip into a computer and instantly run thousands ...
China Pearl River Delta Creating Large Amounts of Hydroxyl Radicals
Jun 06, 2009 |
4.3 / 5 (6) |
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A team of atmospheric scientists have published their field study findings about unusual chemical reactions taking place in the Pearl River Delta in China during 2006. The Julich Research Center's Institute ...
Chip simulates metabolism of medicine in human body
Chemistry / Analytical Chemistry
Apr 24, 2009 |
5 / 5 (5) |
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(PhysOrg.com) -- A tiny electrochemical cell, developed by researchers of the MESA+ Institute for Nanotechnology, The Netherlands, is able to mimick the behaviour of medicine inside a human body. This chip ...
Nanochemistry in Action
Nanotechnology / Nanomaterials
Mar 06, 2009 |
3.8 / 5 (6) |
0
(PhysOrg.com) -- Using a single-walled carbon nanotube (SWCNT) as a test tube, scientists can explore chemistry at the nanoscale, which involves some unique effects. Nanotubes provide a confined, one-dimensional ...
Toshiba launches portable fuel-cell for mobiles
Oct 22, 2009 |
4.4 / 5 (5) |
4
(PhysOrg.com) -- For people fed up with their mobile telephone or iPod batteries running out, Japan's Toshiba Corp. announced Thursday the launch of a portable fuel-cell that can power up digital gadgets on ...
