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Device That Sorts Through Structural Isomers of Neutral Molecules

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2008-04-18 08:09:29 by Michael in Medgadget
...molecules by their mass-to-charge ratio. The apparatus used by the researchers in Berlin sorts the particles in a very similar way, with the difference that they isolate them on the basis of their mass and their dipole moment. Dipole moment is a measure of the strength of a dipole The scientists tested their new method on an aminophenol - on...
 
Tags: molecules, mass, berlin, berlin sorts, quadrupole mass filter, dipole moment, berlin researchers equipment, dipole, beam
 
 
 
 
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Using Lasers for Aligning Bio Molecules

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2008-05-15 23:02:12 by Michael in Medgadget
...molecules using lasers, which may eliminate the need to crystallize large groups of molecules for synchrotron X-ray diffraction. Crystallization allows scientists to create a periodic structure that will strongly diffract in specific directions when bombarded with X-rays. From the resulting diffraction pattern, scientists can construct a...
 
Tags: molecules, x-ray diffraction, x-ray, align molecules, argonne scientists, scientists, require, synchrotron x-ray diffraction, argonne
 
 
 
 
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On Telepathy of DNA Molecules

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2008-01-28 16:44:54 by Michael in Medgadget
...molecules aiding the process, according to new research published this week in the Journal of Physical Chemistry B. This discovery could explain how similar genes find each other and group together in order to perform key processes involved in the evolution of species This new study shows that genes -- which are parts of double-stranded DNA...
 
Tags: dna, identical dna molecules, dna molecules, similar dna segments, double-helix dna molecules, genes recognise similarities, genes, dna repair, recognise
 
 
 
 
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Self-Healing Rubber

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2008-02-27 12:01:00 by bookofjoe in bookofjoe
 
...molecules with strong covalent bonds holding them together. Their idea was to use smaller molecules and link them using hydrogen bonds. Imagine that the interactions are strong enough so the whole thing holds together, he said The processes involved studied in a field known as supramolecular chemistry are complex. The material can easily...
 
Tags: rubber, conventional, conventional rubber consists, supramolecular rubber, super-rubber, rubber-like behaviour, strong, strong covalent bonds, bonds
 
 
 
 
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STORM, A New 3D Super-Resolution Microscopy Technique

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2008-02-19 11:56:17 by Michael in Medgadget
...molecules they want to study with fluorescent probes, and then use a burst of light to activate the fluorescence in a small percentage of labeled molecules. The microscope captures an image of the fluorescing probes. The technique is designed to activate a sufficiently low percentage of the probes to allow the image of each fluorescing...
 
Tags: image, two-dimensional storm image, storm image, storm, technique, complete storm image, readily, storm readily accessible, original storm technique
 
 
 
 
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No, Not Another Electronic Nose!

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2008-02-19 19:11:38 by Michael in Medgadget
...molecules, most of which are present only in trace amounts Just as bad breath can indicate dental problems, excess methylamine may signal liver and kidney disease, ammonia may be a sign of renal failure, elevated acetone levels can indicate diabetes and nitric oxide levels can be used to diagnose asthma, Ye said When many breath molecules are...
 
Tags: breath, bad breath, human breath analysis, breath molecules, current breath analysis, analysis, light, laser light, breath analysis instrument
 
 
 
 
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Scientists Spot Amino Acetonitrile in the Middle of Milky Way

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2008-04-02 17:25:58 by Michael in Medgadget
...molecules known to date have been found, including the most complex ones such as ethyl alcohol, formaldehyde, formic acid, acetic acid, glycol aldehyde (a basic sugar), and ethylene glycol Starting from 1965, more than 140 molecular species have been detected in space, in interstellar clouds as well as in circumstellar envelopes. A large...
 
Tags: amino acetonitrile, complex molecules emit, complex molecules, complex, molecule amino acetonitrile, molecule, molecule closely, molecule heimat, molecules
 
 
 
 
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Artificial Membrane Sacks as Mini Stem Cell Labs

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2008-03-27 20:28:17 by Michael in Medgadget
...molecules, in which their interaction forms a solid membrane that seems to be quite suited for creation of small sacs to host all kinds of cells in biological solutions, including possibly stem cells. The material might also have wider medical applications: Imagine having one polymer and one small molecule that instantly assemble into a...
 
Tags: stem cells, possibly stem cells, human stem cells, cells, sacs, molecules, sacs form instantly, solid membrane, biopolymer hyaluronic acid
 
 
 
 
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Tiny, Portable Chemical Analysis

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2008-01-11 16:21:49 by Michael in Medgadget
...molecules by their telltale electronic signatures. Current versions of portable GC-MS machines, which take about 15 minutes to produce results, are around 40,000 cubic centimeters, about the size of a full paper grocery bag, and use 10,000 joules of energy The new, smaller version consumes about four joules and produces results in about four...
 
Tags: narrow electric field, electric field, molecules, gas molecules, field, mass spectrometry techniques, mass spectrometry, device greatly reduces, device
 
 
 
 
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Scientists Create Biomolecular Movies

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