News tagged with isomer
Isomer
In chemistry, isomers (from Greek ἰσομερής, isomerès; isos = "equal", méros = "part") are compounds with the same molecular formula but different structural formulas. Isomers do not necessarily share similar properties, unless they also have the same functional groups. There are many different classes of isomers, like stereoisomers, enantiomers, geometrical isomers, etc. (see chart below). There are two main forms of isomerism: structural isomerism and stereoisomerism (spatial isomerism).
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Hot molecule explains cold chemistry
(PhysOrg.com) -- Surprisingly, hydrogen cyanide and its far more energetic isomer, hydrogen isocyanide, are present in almost equal amounts in cold interstellar gas clouds. Scientists from the Max Planck Institute ...
Jan 30, 2012 |
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Scientists solve mystery of the eye
(PhysOrg.com) -- Scientists have a good overall understanding of human vision: when light enters our eyes, it is focused by the lens and strikes the retina in the back of the eye. The light causes some of ...
Nov 17, 2011 |
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New method for preparation of high-energy carbon-carbon double bonds
A new catalytic chemical method for the synthesis of a large and important class of carbon-carbon double bonds has been developed by scientists from Boston College and MIT, the team reports in the journal Nature. The findin ...
Mar 23, 2011 |
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Researchers turn photons into work using DNA
(PhysOrg.com) -- By using light to change the elasticity of a DNA molecule, scientists have designed a molecular motor that can turn light into mechanical work. Unlike most previously reported molecular motors, ...
Mar 10, 2011 |
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Tangerine tomatoes surpass reds
(PhysOrg.com) -- Besides their appealing orange color and sweet flavor, there's another reason to give tangerine tomatoes a try this year. A one-month study led by U.S. Department of Agriculture (USDA) scientists ...
Feb 02, 2011 |
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Targeted agent shows promise for chronic lymphoid leukemia
Researchers at the Ohio State University Comprehensive Cancer Center-Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC-James) have identified an experimental agent that targets chronic lymphocytic ...
Sep 13, 2010 |
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Eclectic enzymes: Easily modified building blocks for drug design
(PhysOrg.com) -- In the pursuit of biologically active compounds, it is often necessary to be able to control the stereochemistry at predefined positions in a molecular skeleton. The search for ways to prepare ...
Sep 02, 2010 |
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Researchers image crucial anthrax protein
(PhysOrg.com) -- Anthrax, long feared for its potential as a biological weapon, has lost some of its mystery. Researchers at the U.S. Department of Energy's (DOE) Argonne National Laboratory, in collaboration ...
Jul 14, 2009 |
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Microbes point to method for isolating harmful forms of drugs
(PhysOrg.com) -- Scientists at MIT and Brown University studying how marine bacteria move recently discovered that a sharp variation in water current segregates right-handed bacteria from their left-handed ...
Apr 15, 2009 |
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A New Family of Molecules for Self-Assembly: The Carboranes
(PhysOrg.com) -- To be useful in real-world applications, a self-assembled monolayer (SAM) of molecules on a surface must have a stable and controllable geometry. Researchers at Penn State and the Sigma-Aldrich ...
Nanotechnology / Nanomaterials
Mar 24, 2009 |
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