Navigation Links
Story tips From the Department of Energy's Oak Ridge National Laboratory, March 2012
Date:3/14/2012

MATERIALS -- POWGEN open for business . . .

The Spallation Neutron Source's Powder Diffractometer POWGEN has launched a rapid access sample mail-in system for users who use the flexible general-purpose instrument for a wide range of structural studies of novel materials. The instrument will be made available to rapid access users for a few days each cycle, offering data collection for two temperatures between 12 degrees Kelvin and 300 degrees Kelvin per sample. Users with a new material to test will not have wait six months for beam time. If response is good, the instrument could run tests on as many as 24 mail-in samples over two days. The instrument scientists would send back the data to the users. POWGEN specializes in magnetic materials such as high-Technitium superconductors and metal insulator phase transitions as well as nonmagnetic materials, polycrystalline materials for pharmaceutical compounds, metals and semi-conductors and new battery materials. [Written by Agatha Bardoel; media contact: Ron Walli, (865) 576-0226; wallira@ornl.gov]

CHEMISTRY -- Unraveling methane's structure . . .

Considering how ubiquitous it is on earth, methane (natural gas) at the molecular level is a scientific unknown. To understand it and to manage it both as energy and as an environmental hazard, scientists need to know more about its molecular structure. A neutron diffraction study at the Spallation Neutrons and Pressure Diffractometer at Oak Ridge National Laboratory has successfully mapped the structure of methane and water cages, known as clathrates, under more than half a million pounds of pressure per square inch. The researchers came up with a new potential ─ a new calculation of the repulsion force that exists between methane molecules in these cages ─ that indicated there were five methane molecule "guests" inside the enlarged polyhedral structures that emerged under the high-pressure conditions. [Written by Agatha Bardoel; media contact: Ron Walli, (865) 576-0226; wallira@ornl.gov]

BIOLOGY -- Model tells the story . . .

Casein micelles in milk, stabilized by molecules of κ-casein, are the building blocks of dairy products such as yogurt and cheese and the vehicle for delivering calcium phosphate to newborns. Several models for the internal structure of these have been proposed. Using contrast variation small-angle neutron scattering at the General Purpose SANS instrument at Oak Ridge National Laboratory's High Flux Isotope Reactor, researchers have confirmed that one model prevails: Casein micelles are composed of a protein matrix in which the calcium phosphate nanoclusters (about 300 per casein micelle) are dispersed. The protein matrix has local density fluctuations that may be ascribed to the hydrophobic interactions of these proteins. A new method was developed and used to calculate the scattering spectra of composite particles. [Written by Agatha Bardoel; media contact: Ron Walli, (865) 576-0226; wallira@ornl.gov]

CHEMISTRY -- Workshop helps student earn publication . . .

An Oregon State University graduate student has successfully turned her participation in a two-day POWGEN Neutron Diffraction workshop at Oak Ridge National Laboratory's Spallation Neutron Source into a published paper in the Journal of Solid State Chemistry. Participants at the workshop in September were invited to bring their own samples for analysis on the time of flight diffractometer. They received training on the instrument and then were taught how to collect and analyze the data. Rosa Grajczyk, a second-year PhD student in chemistry working on structural properties of new materials, brought a solid solution of indium-gallium-magnesium-oxide to the workshop as part of her thesis work. "The amount of detail that went into the workshop was incredible," Grajczyk said, "and I was facilitated by the helpfulness of everyone at the facility." Her paper on the lattice structure of the new material was accepted in the Journal of Solid State Chemistry. [Written by Agatha Bardoel; media contact: Ron Walli, (865) 576-0226; wallira@ornl.gov]

PHYSICS -- Searching for 'supersolidity' . . .

Theoretical physicists have long predicted the existence of a quantum state of matter they call "supersolidity," in which solid helium-4 loses its viscosity and flows like a liquid. Researchers are using the Spallation Neutron Source in a series of studies to pin down whether this paradoxical new state of matter can be demonstrated. The experiments involve growing crystals of solid helium inside a one-of-a-kind sample cell at almost absolute zero temperature and crushing pressure. The scientists have seen tantalizing signs of what they are seeking, but not proof, as yet. The experiments are continuing. [Written by Deborah Counce; media contact: Ron Walli, (865) 576-0226; wallira@ornl.gov]


'/>"/>

Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Related biology news :

1. New study indicates link between weight gains during pregnancy and dieting history
2. Revealing the evolutionary history of threatened sea turtles
3. The "hole" story
4. The hole story
5. Human connection to our nations fisheries comes alive through oral history project
6. Italys geologic history becomes a personal tale in Walter Alvarezs new book
7. NJIT history professor receives national endowment for humanities
8. Chantix side effects no worse with depression history
9. Story tips from the Departments of Energys Oak Ridge National Lab -- March 2009
10. Study of protein structures reveals key events in evolutionary history
11. The story of X -- evolution of a sex chromosome
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2016)... and BANGALORE, India , April 28, ... Systems, a product subsidiary of Infosys (NYSE: INFY ... announced a global partnership that will provide end ... use mobile banking and payment services.      (Logo: ... key innovation area for financial services, but it also plays ...
(Date:4/26/2016)... Research and Markets has announced ... 2016-2020"  report to their offering.  , ,     (Logo: ... analysts forecast the global multimodal biometrics market to ... period 2016-2020.  Multimodal biometrics is being ... the healthcare, BFSI, transportation, automotive, and government for ...
(Date:4/15/2016)... 2016 Research and Markets has ... Market 2016-2020,"  report to their offering.  , ... ,The global gait biometrics market is expected to ... period 2016-2020. Gait analysis generates multiple ... used to compute factors that are not or ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... NEW YORK , June, 23, 2016  The ... students to envision new ways to harness living systems ... of Modern Art (MoMA) in New York ... more than 130 participating students, showcased projects at MoMA,s ... included Paola Antonelli , MoMA,s senior curator of ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry Network ... Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s mission is ... projects are designed, built and brought to market. , The Design Lab is ...
(Date:6/23/2016)... ... June 23, 2016 , ... In a new case report published ... how a patient who developed lymphedema after being treated for breast cancer benefitted from ... the paradigm for dealing with this debilitating, frequent side effect of cancer treatment. ...
(Date:6/23/2016)... Calif. , June 23, 2016  Blueprint Bio, ... biological discoveries to the medical community, has closed its ... Matthew Nunez . "We have received ... with the capital we need to meet our current ... essentially provide us the runway to complete validation on ...
Breaking Biology Technology: