Many health advocates advise people to eat an orange and drink water rather than opt for a serving of sugary juice. But in the Journal of Agricultural and Food Chemistry, scientists report that the picture is not clear-cut. Although juice is indeed high in sugar, the scientists found that certain nutrients in orange juice might be easier for the body to absorb than when a person consumes them from unprocessed fruit.
Satellite images have revealed that a remote Arctic ice cap has thinned by more than 50 m since 2012 and that it’s now flowing 25 times faster. A team led by scientists from the Centre for Polar Observation and Modelling (CPOM) at the Univ. of Leeds combined observations from eight satellite missions, including Sentinel-1A and CryoSat, with results from regional climate models, to unravel the story of ice decline.
A research team has developed a new technique for determining the role that a material’s structure has on the efficiency of organic solar cells, which are candidates for low-cost, next-generation solar power. The researchers have used the technique to determine that materials with a highly organized structure at the nanoscale are not more efficient at creating free electrons than poorly organized structures.
One of the reasons solar cells are not used more widely is cost: The materials used to make them most efficient are expensive. Engineers are exploring ways to print solar cells from inks, but the devices don’t work as well. A team of engineers has developed a technique to increase the performance and electrical conductivity of thin films that make up these materials using nanotechnology.
A team of experts from the Univ. of Exeter has examined new techniques for generating photovoltaic (PV) energy more cost efficiently. The global PV market has experienced rapid growth in recent years due to renewable energy targets and carbon dioxide emission controls. However, current, widely used commercial methods employed to generate PV energy, such as using silicon or thin-film-based technologies, are still expensive.
Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass. However, it has generally been thought impossible for particles of light, known as photons, to be slowed as they travel through free space, unimpeded by interactions with any materials.
E. coli usually brings to mind food poisoning and beach closures, but researchers recently discovered a protein in E. coli that inhibits the accumulation of potentially toxic amyloids, a hallmark of diseases such as Parkinson's. Amyloids are formed by proteins that misfold and group together, and when amyloids assemble at the wrong place or time, they can damage brain tissue and cause cell death.
Scientists have identified synthetic materials that may purify ethanol more efficiently and greatly improve the separation of long-chain hydrocarbons in petroleum refining. The results show that predictive modeling of synthetic zeolites is highly effective and can help solve some of the most challenging problems facing industries that require efficient ways to separate or catalyze materials.
Ian Duncan is a Scotsman with the iron discipline and stamina of a competitive marathoner, triathlete and cross-country skier. As a neuroscientist at the School of Veterinary Medicine at the Univ. of Wisconsin-Madison, he’s applied his tenacity to a rare genetic disorder. Known as Pelizaeus Merzbacher disease or PMD, it’s a devastating neurological condition that, in its most severe form, kills infants weeks after birth.
Univ. of Chicago scientists have experimentally observed, for the first time, a phenomenon in ultracold, three-atom molecules predicted by Russian theoretical physicist Vitaly Efimov in 1970. In this quantum phenomenon, called geometric scaling, the triatomic molecules fit inside one another like an infinitely large set of Russian nesting dolls.
Researchers report the first crystal structure of the cellular receptor CXCR4 bound to an immune signaling protein called a chemokine. The structure, published in Science, answers longstanding questions about a molecular interaction that plays an important role in human development, immune responses, cancer metastasis and HIV infections.
Sound waves passing through the air, objects that break a body of water and cause ripples or shockwaves from earthquakes all are considered “elastic” waves. These waves travel at the surface or through a material without causing any permanent changes to the substance’s makeup. Now, researchers have developed a material that has the ability to control these waves.
Reducing the use of laboratory animals has been a long-term goal in biological research. Many in vivo assays, like rabbit endotoxin testing or mouse antibody production testing to detect viral contaminants have largely been replaced by in vitro enzyme or PCR-based assays.
The Bulletin of the Atomic Scientists says Earth is now closer to human-caused doomsday than it has been in more than 30 years because of global warming and nuclear weaponry. But other experts say that's way too gloomy. The advocacy group founded by the creators of the atomic bomb moved their famed "Doomsday Clock" ahead two minutes on Thursday.
Lori Simons took the bright orange pill at 3 a.m. Eight hours later, doctors sliced into her brain, looking for signs that the drug was working. She is taking part in one of the most unusual cancer experiments in the nation. With special permission from the Food and Drug Administration and multiple drug companies, an Arizona hospital is testing medicines very early in development and never tried on brain tumors before.