Most of the laws of nature treat particles and antiparticles equally, but stars and planets are made of particles, or matter, and not antiparticles, or antimatter. That asymmetry, which favors matter to a very small degree, has puzzled scientists for many years. New research offers a possible solution to the mystery of the origin of matter in the universe.
Paving the way for lighter and more flexible solar devices, Univ. of California, Los Angeles...
Overheating is a major problem for the microprocessors that run our smartphones and computers....
One of nature’s fascinating questions is how zebras got their stripes. A team of life scientists led by Univ. of California, Los Angeles has found at least part of the answer: The amount and intensity of striping can be best predicted by the temperature of the environment in which zebras live.
A group led by scientists has developed a new method for effectively extracting and analyzing cancer cells circulating in patients’ blood. Circulating tumor cells are cancer cells that break away from tumors and travel in the blood, looking for places in the body to grow new tumors called metastases. Capturing these rare cells would allow doctors to detect and analyze the cancer so they could tailor treatment for individual patients.
As the largest single chunk of melting snow and ice in the world, the massive ice sheet that covers about 80% of Greenland is recognized as the biggest potential contributor to rising sea levels due to glacial meltwater. Until now, however, scientists’ attention has mostly focused on the ice sheet’s aquamarine lakes and on monster chunks of ice that slide into the ocean to become icebergs.
Univ. of California, Los Angeles researchers have developed a lens-free microscope that can be used to detect the presence of cancer or other cell-level abnormalities with the same accuracy as larger and more expensive optical microscopes. The invention could lead to less expensive and more portable technology for performing common examinations of tissue, blood and other biomedical specimens.
Lawrence Livermore National Laboratory researchers in conjunction with collaborators at Univ. of California, Los Angeles have found that some cells build intracellular compartments that allow the cell to store metals and maintain equilibrium. Nearly 40% of all proteins require metal ions such as zinc, copper, manganese or iron for activity.
In a recent study, Univ. of California, Los Angeles scientists have shown that two genes not previously known to be involved with the immune system play a crucial role in how progenitor stem cells are activated to fight infection. This discovery lays the groundwork for a better understanding of the role progenitor cells can play in immune system response and could lead to the development of more effective therapies for diseases.
A pair of researchers from the Univ. of California, Los Angeles Henry Samueli School of Engineering and Applied Science has created the first surface texture that can repel all liquids, no matter what material the surface is made of. Because its design relies only on the physical attributes of the texture, the texture could have industrial or biomedical applications.
Univ. of California, Los Angeles neurophysicists have found that space-mapping neurons in the brain react differently to virtual reality than they do to real-world environments. Their findings could be significant for people who use virtual reality for gaming, military, commercial, scientific or other purposes.
Univ. of California, Los Angeles biochemists have created the largest-ever protein that self-assembles into a molecular “cage.” The research could lead to synthetic vaccines that protect people from the flu, HIV and other diseases. At a size hundreds of times smaller than a human cell, it also could lead to new methods of delivering pharmaceuticals inside of cells, or to the creation of new nanoscale materials.
Researchers at the Univ. of California, Los Angeles Henry Samueli School of Engineering and Applied Science have developed a more efficient way to turn methanol into useful chemicals, such as liquid fuels, and that would also reduce carbon dioxide emissions. Methanol, which is a product of natural gas, is well-known as a common “feedstock” chemical.
Plants all over the world are more sensitive to drought than many experts realized, according to a new study by scientists at the Univ. of California, Los Angeles and China’s Xishuangbanna Tropical Botanical Garden. The research will improve predictions of which plant species will survive the increasingly intense droughts associated with global climate change.
Graphene’s exotic properties can be tailored by cutting large sheets down to ribbons of specific lengths and edge configurations. But this “top-down” fabrication approach is not yet practical, because current lithographic techniques always produce defects. Now, scientists from the U.S. and Japan have discovered a new “bottom-up” self-assembly method for producing defect-free graphene nanoribbons with periodic zigzag-edge regions.
A multidisciplinary team of scientists from the Univ. of California, Los Angeles and Stanford Univ. has used a naturally occurring nanoparticle called a vault to create a novel drug delivery system that could lead to advances in the treatment of cancer and HIV. Their findings could lead to cancer treatments that are more effective with smaller doses and to therapies that could potentially eradicate the HIV virus.
Imagine watching a procedure performed live through the eyes of the surgeon. That’s exactly what surgical leaders in the U.S. were able to do while overseeing surgeons training in Paraguay and Brazil with the help of UCLA doctors and Google Glass. UCLA surgeon Dr. David Chen and surgical resident Dr. Justin Wagner have made it their mission to teach hernia surgery around the world and are harnessing the latest technologies to help.
Researchers in California have created a nanoscale magnetic component for computer memory chips that could significantly improve their energy efficiency and scalability. The design brings spintronics one step closer to being used in computer systems by adopting a new strategy called “spin-orbit torque” that eliminates the need for a magnetic field for switching processes.
A team led by researchers from the Univ. of California, Los Angeles has developed a new process to control molecular growth within the "building block" components of inorganic materials. The method, which uses nanoparticles to organize the components during a critical phase of the manufacturing process, could lead to innovative new materials, such as self-lubricating bearings for engines.
In pharmaceutical production, identifying enzyme catalysts that help improve the speed and efficiency of the process can be a major boon. Figuring out exactly why a particular enzyme works so well is an altogether different quest. Take the cholesterol-lowering drug simvastatin.
Scientists have published the first study explaining in detail how viruses reprogram the metabolism of the cells they invade to promote continued viral growth within an organism.
The frustrated attempts of a Univ. of California, Los Angeles graduate student to quantify the amount of water draining from Greenland's melting ice sheet led him to devise a new way to measure river flows from outer space, he and his professor report in a new study. The new approach relies exclusively on the measurements of a river's width over time, which can be obtained from freely available satellite imagery.
Flawed but colorful diamonds are among the most sensitive detectors of magnetic fields known today, allowing physicists to explore the minuscule magnetic fields in metals, exotic materials and even human tissue. A team of physicists have now shown that these diamond sensors can measure the tiny magnetic fields in high-temperature superconductors, providing a new tool to probe these much ballyhooed but poorly understood materials.
A team of researchers has developed a material that could help prevent blood clots associated with catheters, heart valves, vascular grafts and other implanted biomedical devices. Blood clots at or near implanted devices are thought to occur when the flow of nitric oxide, a naturally occurring clot-preventing agent generated in the blood vessels, is cut off. When this occurs, the devices can fail.
A diverse team of scientists from Univ. of California, Los Angeles' Jonsson Comprehensive Cancer Center has developed an experimental treatment that eradicates an acute type of leukemia in mice without any detectable toxic side effects. The drug works by blocking two important metabolic pathways that the leukemia cells need to grow and spread.
Working on the cutting edge of a newly emerging area of solar-cell research, Univ. of California, Los Angeles engineers have invented a new process for manufacturing highly efficient photovoltaic materials that shows promise for low-cost industrial production. The new process uses so-called perovskite materials, which in the past few years have significantly advanced scientists' efforts to create the next generation of solar cells.
A team of engineers from the Univ. of California, Los Angeles has developed a smartphone attachment and application to test water for the presence of mercury, a toxic heavy metal. The new platform could significantly reduce the time and cost of the testing, and it could be particularly useful in regions with limited technological resources.
To safely use bacteria in agriculture to help fertilize crops, it is vital to understand the difference between harmful and healthy strains. The bacterial genus Burkholderia, for example, includes dangerous disease-causing pathogens—one species has even been listed as a potential bioterrorist agent—but also many species that are safe and important for plant development.
- Page 1