Chemical evidence proves the old adage, Birds of a feather flock together
...irds feathers during long migrations. Isotopes are atoms of the same element that contain different numbers...ons and six neutrons. A small percentage of carbon atoms carry an extra neutron and therefore are known as carbon 13. Hydrogen 1 (the most common hydrogen i...How cold! New partnership to use chilled neutrons
..."cold" neutrons. Stripped from the nuclei of heavy atoms and then cooledby liquid hydrogen, these unchargedparticles are ideally suited forexploring the disordered, continuallychanging landscape of cell membranes. "Cold neutrons provide a powerful toolfor studying cell membrane systems,"says White, "but th......ird heavier atom and converts some of the original atoms mass into energy. Nuclear fission, the type of rea...ntly used in commercial power plants, splits heavy atoms like uranium and releases some of the excess energy stored as mass in the uranium atoms. Scientists ...Physics tip sheet #3 March 6, 2002
...fullerene molecules (C_70, consisting of 70 carbon atoms each) have been made to show wave interference in good agreement with quantum predictions. The fullerenes are passed through three gratings made of finely spaced gold wires and found to leave a pattern of peaks and troughs unlike the flat pattern for...Physics tip sheet #4 March 13, 2002
... atom interferometry (in which two beams of cooled atoms are made to interfere with each other) is able to distinguish between vibrations and gravity changes by measuring local changes in the gravitational field. The device is sensitive to one part in one billion variations, sensitive enough to make useful...Chicago chemist wins national award for new research methods
...ants in the world use this technology. Most of the atoms in Vora's linear alkylbenzenes — the cleanin...l highly branched; that is, the structure of their atoms looked like tree branches and was difficult for bacteria to break down as food. The technologies dev...Brookhaven Spotlights: News from the National Synchrotron Light Source
...n the magnetic fields of electrons and neighboring atoms interact with each other. This process brings new ...stal of a protein made of hundreds of thousands of atoms a task that requires weeks of intense work. Instead, the Los Alamos scientists prepared a powder m...Small research big on Illinois campus
...ely work on a scale ranging from the size of small atoms to that of large molecules. Working at the nanosc...rch and bring together people who are working with atoms and those who are working on systems for practical applications, Adesida said. Collaboration in the...New evidence for organic compounds in deep space
...ove absolute zero. The bonding energy of noble gas atoms is so small that it scarcely affects the spectrum....d wavelength. The physicist used various noble gas atoms and repeatedly obtained the same spectrum. This strongly indicates that the noble gas did not disrup...From nanotechnology to raspberries, Virginia Tech inventions and creations can improve our lives
...ntum computing devices can be created by including atoms that have unpaired electrons and/or spin active materials. The patent, "Endohedral Metallofullerenes and Method for Making the Same" (No. 6,303,760) describes trimetallic nitride endohedral metallofullerenes and their preparation. A nitrogen atom anc...Disorder forces DNA molecules out of tight spaces
...eed." The recoil happens, Turner explains, because atoms within the chain molecules are always in motion, always colliding with water molecules and the surrounding pillars. Inside the pillared space, he says, these collisions happen in all directions, tending to cancel each other out. But at the interface...Physics tip sheet #13 May 15, 2002
...link.aps.org/abstract/PRL/v88/e216802 5) Chromium atoms on demand S. B. Hill, J. J. McClelland APS Divisio...June 1, 2002) A NIST group can now supply chromium atoms on demand, one at a time, the first time such control over neutral atom delivery has been achieved. ...New method for 'visualizing' proteins
...re of a protein by measuring the distances between atoms in the molecule at greater separations than previously possible, is an important development, says Jack Freed, professor of chemistry and chemical biology at Cornell, who is director of the National Biomedical Center for Advanced ESR Technology (ACER...Physics tip sheet #18 June 19, 2002
...sical Review Letters Knowing how small clusters of atoms join together is vital in the drive to create nano... Among the surprising results is that for up to 13 atoms gold likes to cluster in flat planes rather than three-dimensional structures. Although this seems f...Clemson researchers create biosensors to protect nation's food and water supplies
... knowledge by scientists who investigate arranging atoms to create innovations that can be seen only with electron microscopes. Nature does a great job of putting together molecules and other nanoscale components in complex patterns, Dawson said. His team is working on a single molecule process, creating ...Protein simulation can be done three times as fast
...now researchers calculated all of the positions of atoms in a protein molecule after two femtoseconds. A fe...tudent Anton Feenstra: "The forces around hydrogen atoms are so small that they cannot really be calculated according to the standard billiard ball descripti...Physics tip sheet #20 July 3, 2002
... been predicted in Bose-Einstein condensates where atoms that are fired at a BEC seem to leave before they ... more. The study reinforces the similarity between atoms as waves and light as waves. The results also show the conditions for which incident atoms are refle...Texas scientists reach out and touch molecules
...ly speaking, a healthy molecule made up of various atoms has a mouth-like opening where a drug or inhibitor...o calculate the interaction with a large number of atoms while meeting "Touch's rapid cycle time. Swanson figured out how to calculate a 50-atom drug molecul...Infrared antenna for nano-size mapping of crystal vibrations
... The origin of this reflection is that the lattice atoms vibrate against each other and hinder infrared light waves of the same band of frequencies from entering. The team of physicists consisting of Rainer Hillenbrand (postdoc), Thomas Taubner (doctoral student) and Fritz Keilmann (senior researcher) now ...Structure of key receptor unlocked; Related proteins will fall like dominoes
...ys travel through the crystal, they hit individual atoms in the protein and are bounced back or bent, depending on the 3-D arrangement of the atoms. Others travel through unaffected. By analyzing where the X-rays end up, the scientists can reconstruct how the protein is put together. One unexpected aspect ...