Search results for spheres:
Hollow spheres made of metal
Oct 13, 2009 |
4.9 / 5 (9) |
5
Producing metallic hollow spheres is complicated: It has not yet been possible to make the small sizes required for new high-tech applications. Now for the first time researchers have manufactured ground hollow ...
Physicists determine density limit for randomly packed spherical materials
Jun 02, 2008 |
3.5 / 5 (21) |
2
The problem of how many identical-sized spheres can be randomly packed into a container has challenged mathematicians for centuries. A team of physicists at The City College of New York (CCNY) has come up with a solution ...
Cancer stem cells generated by cancer outgrowth
Apr 02, 2009 |
5 / 5 (2) |
0
Scientists have discovered that growing mouse skin cells in spheres can lead to generation of cells with properties of cancer stem cells, even without genetic manipulation of stem cell genes. This unexpected finding, published ...
Scientists build 'roach motel' for nasty bugs of the bacterial variety
Nov 24, 2008 |
4.3 / 5 (3) |
0
The vacancy sign is on, but the lowlifes who check in never check out. Scientists at the University of Florida and the University of New Mexico have created tiny microscopic spheres that trap and kill harmful bacteria in ...
Emulsion with a round-trip ticket
Jun 14, 2007 |
4.7 / 5 (6) |
0
Oil and water are not miscible. However, it is possible to combine both into an emulsion in which they act as a unit—for example, in creams, body lotion, milk, or mayonnaise. In these substances, one of the two liquids is ...
Nanoscale Cubes and Spheres
Nanotechnology / Nanomaterials
Jan 03, 2007 |
3.9 / 5 (13) |
0
Porous nano-objects with defined sizes and structures are particularly interesting, for example, as capsules for enzymes, a means of transport for pharmaceutical agents, or building blocks for larger nanostructures.
Researchers bend light through waveguides in colloidal crystals
Jan 07, 2008 |
4.2 / 5 (10) |
0
Researchers at the University of Illinois are the first to achieve optical waveguiding of near-infrared light through features embedded in self-assembled, three-dimensional photonic crystals. Applications for the optically ...
Bristly Spheres as Capsules
Mar 06, 2009 |
3 / 5 (1) |
0
(PhysOrg.com) -- Amphiphilic molecules, which have one water-friendly (hydrophilic) end and one water-repellant (hydrophobic) end, spontaneously aggregate in aqueous solutions to make superstructures like ...
Molten Proteins: Surface-modified liquid protein with liquid-crystalline properties
Aug 17, 2009 |
not rated yet |
0
(PhysOrg.com) -- Proteins are solids. When heated they do not melt; instead, they decompose or sublime directly to the gas phase at low pressures. They cannot be converted into a liquid form unless they are dissolved in a ...
Shape matters in the case of cobalt nanoparticles
Nanotechnology / Nanomaterials
Jun 17, 2009 |
not rated yet |
0
Shape is turning out to be a particularly important feature of some commercially important nanoparticles—but in subtle ways. New studies* by scientists at the National Institute for Standards and Technology ...
Platinum cages: Liposomes as blueprints for hollow platinum nanospheres
Nanotechnology / Nanomaterials
Nov 02, 2006 |
3.8 / 5 (12) |
0
It looks like lather under an electron microscope: American researchers have successfully produced porous, nanoscopic, hollow platinum spheres by using liposomes as blueprints.
Single-cell sensitive biological sensor works in liquid
Nov 26, 2007 |
4.3 / 5 (6) |
0
Microscopic, magnetized balls of Styrofoam have been turned into inexpensive biological sensors in a University of Michigan laboratory.
Eye cells believed to be retinal stem cells are misidentified
Mar 30, 2009 |
not rated yet |
0
Cells isolated from the eye that many scientists believed were retinal stem cells are, in fact, normal adult cells, investigators at St. Jude Children's Research Hospital have found. If retinal stem cells could be obtained, ...
Magnetic Snakes Create Water Current
Sep 24, 2007 |
4.4 / 5 (24) |
0
Physicists at Argonne National Laboratory have found that magnetic particles suspended in water and subjected to an alternating magnetic field will form snake-shaped structures that can control the flow of ...
Purifying nanorods: Big success with tiny cleanup
Nanotechnology / Nanomaterials
Sep 22, 2008 |
4.4 / 5 (11) |
0
Chemists at Rice University have discovered a novel method to produce ultra-pure gold nanorods -- tiny, wand-like nanoparticles that are being studied in dozens of labs worldwide for applications as broad as diagnosing disease ...
