Purdue helps Indiana companies with pollution dilemma
...ecreation of ozone, a molecule that contains three atoms of oxygen instead of theenvironmentally friendly two-atom form of the gas. Ozone is a pollutant that isunhealthy to breathe and that may harm vegetation and wildlife. It should not be confused with naturally occurring atmospheric ozone,contai...New technique builds microscopic medical devices for transplants
... asmooth layer of silicon atoms and eat away portions of thesurface with chemicals. The holes that result are all the samesize, down to an atom. "If we want to make 18-nanometer holes, we make 18-nanometer h...NRC discovery allows scientists to watch the ultrafast processes of the microworld
...in molecules. When a molecule is excited, both its atoms and electronscan begin to move. The electrons, being very light and fast, might easily adjustto the motions of the much heavier atoms. In many important cases, however, theelectronic rearrangements and atomic motions occur on the same time scale,maki...Snapshot of new drug marks a major advance by Memorial Sloan-Kettering researchers
...et, at the bottom of which is the active site- the atoms where SAHA and trichostatin A bind. The critical ... calledhydroxamic acid, and a long narrow chain of atoms that allows the hydroxamicacid to reach all the way to the bottom of the pocket. The combination pr...Clay M. Armstrong, MD, wins 1999 Albert Lasker Basic Medical Research Award
...ontrol the movement of ions - electrically charged atoms -into or out of the cell. These ions include sodium, potassium, calcium, andchloride, and their movement constitutes an electrical current. Many importantdrugs act by blocking ion channels. Examples include local anaesthetics andcalcium channel block...How biological molecules move electrons: Simplicity trumps complexity
...rganization energy associated with the movement of atoms after the transfer, the packing density of the atoms in the protein between redox centers, and the distance in angstroms between redox centers. The resul...Another small cog in the 'hub' of metabolism unraveled
...alysis of an enzyme consisting of several thousand atoms can be a difficult and time-consuming task. Initia...raphy can be applied. The regular array of protein atoms in the crystal diffracts X-rays, leading to a pattern of spots with different intensities on a detec...Key progress by Weizmann scientists in the race to unravel ribosomal structure
...onath's approach lies in phasing - designing heavy atoms as markers that standout like flares in the ribosomal map due to their high electron density. These markers significantlyenhance the ability to pinpoint functional units within the ribosome. And the resultant image,constructed from twice as much diff...'Frozen pictures' allow far-reaching glimpse into the cells protein factory
... of her approach lies in phasing - designing heavy atoms as markers that stand out like flares in the ribos...consisting of the original material to which heavy atoms were bound in key sites," explains Yonath. And the resultant image, constructed from twice the dif...DFG to set up 21 new collaborative research centres in 2000
...chniques for the direct manipulation of individual atoms or molecules. Speaker: Prof. Dr. Hermann E. Gaub, Lehrstuhl fur Angewandte Physik, tel.: 089/2180 3173 The development of new ion-conducting materials such as are employed in solid batteries and fuel cells, in chemical sensors and electrochemistry,...Antibacterial implants could prevent infections, save patients' lives
...the device. "The outer coating is just 10 or 20 atoms thick," Ratner said. "It makes for a very controlled, slow release." Tests showed that the system maintains a protective drug cloak for at least five days. The technology has another advantage for hospital patients - it prevents the development of......er metals out of the groundwater because strontium atoms and other contaminants can replace calcium atoms in the mineral's crystal structure. The existence of the urea-hydrolyzing microbes suggests natur...Human stem cell research leads Science's top ten list of the best scientific advances in 1999
...n of atomic clocks and lasers. The gas consists of atoms that fall into the category of fermions, one of nature's two types of elementary particles, which by definition are antisocial particles that refuse to occupy the same energy state. Now a team of scientists has coaxed a swarm of fermions into a state...Distance between atoms is key to iron protein function
...ation, the same intermediate is used to store iron atoms within the protective protein envelope of the iro...ally short distance of 2.53 angstroms between iron atoms in the peroxide-bridged ferritin intermediate---a distance about 0.5 to 1.5 angstroms shorter than ...Brookhaven scientists create new ways to tag and track molecules
...n group has made tags that range in size from four atoms to more than 100,000 atoms. Once the scientists have produced a core with the number of metal atoms they need, they use organic chemistry methods to attach a variety of organic molecules around the ou...Chemical probe reveals ultrafast movements of DNA proteins
... light to view the movement of atoms inside molecules. This work was primarily funded by the National Institutes of Health and the National Science Foundation....Uncovering structure of cellular switch could aid design of cancer-fighting drugs
...raphy reveals the three-dimensional arrangement of atoms in molecules by bombarding them with intense bursts of X-rays. A "ribbon" diagram of the Cdc42/GDI complex is printed on the cover of the journal. Co-authors of the report, along with Cerione, are Gregory R. Hoffman, a Cornell graduate student in b......the reaction, the enzyme oxidized, or added oxygen atoms to a hydrocarbon molecule. The research collabora...f the enzyme: It splits molecular oxygen into two atoms and inserts one of the atoms into a hydrocarbon -- in this case, into camphor. While the research...New research proves fullerene can be cosmic carbon carriers
...ite. Fullerenes are molecules of 60 or more carbon atoms formed into a hollow cage-like structure. They are named for Buckminster Fuller because the 60-atom C60 structures called "buckyballs" resemble the designer's geodesic dome. The scientists had found significant quantities of very large fullerene mole......nalysis of electrostatic forces between individual atoms of the penicillin and b-lactamase enzyme and computational simulation of their interactions. They concluded that b-lactamase attacks penicillin in a way different than previously thought. An intact penicillin molecule contains a characteristic seg...