823,565 articles

New planet-weighing technique found

Although there have been about 800 extra-solar planets discovered so far in our galaxy, the precise masses of the majority of them are still unknown, as the most-common planet-finding technique provides only a general idea of an object's mass. Previously, the only way to determine a planet's exact mass was if it transits. Former Carnegie scientist Mercedes López-Morales has, for the first time,...

New technique controls crystalline structure of titanium dioxide

Researchers have developed a new technique for controlling the crystalline structure of titanium dioxide at room temperature. The development should make titanium dioxide more efficient in a range of applications, including photovoltaic cells, hydrogen production, antimicrobial coatings, smart sensors and optical communication technologies.

New way of probing exoplanet atmospheres

For the first time a new technique has allowed astronomers to study the atmosphere of an exoplanet in detail -- even though it does not pass in front of its parent star. An international team has used ESO's Very Large Telescope to directly catch the faint glow from the planet Tau Boötis b, solving a 15-year-old problem. The team also finds that the planet's atmosphere seems to be cooler higher...

Patient care by residents is as good as by fully qualified doctors

Medical residents are an essential part of the hospital workforce. Although still in training the take on much of the day to day care of patients. A systematic review published in BioMed Central's open-access journal BMC Medicine shows that patient by properly supervised residents care is safe and of equal quality to that of fully trained doctors.

Probing the roots of depression by tracking serotonin regulation at a new level

An interdisciplinary team of scientists have successfully tagged a protein that regulates the neurotransmitter serotonin with tiny fluorescent beads, allowing them to track the movements of individual molecules for the first time. This capability makes it possible to study the manner in which serotonin regulates mood, appetite and sleep at a new level of detail.

Racial make-up of community impacts obesity risk

The racial and ethnic composition of a community is associated with the obesity risk of individuals living within the community, according to a study led by researchers at the Agency for Healthcare Research and Quality and the Johns Hopkins Bloomberg School of Public Health. The findings may help explain disparities in obesity rates among racial groups and point to some of the environmental...

Scientists measure soot particles in flight

For the first time, air-polluting soot particles have been imaged in flight down to nanometer resolution. Pioneering a new technique, the international team, including researchers from DESY, snapped the most detailed images yet of airborne aerosols.

Scripps Research Institute scientists find easier way to make new drug compounds

Scientists at the Scripps Research Institute have developed a powerful new technique for manipulating the building-block molecules of organic chemistry. The technique enables chemists to add new functional molecules to previously hard-to-reach positions on existing compounds -- making it easier for them to generate new drugs and other organic chemicals.

Sensitive test helps improve vaccine safety

Salmonella Typhi (S. Typhi) is the causative agent of typhoid fever, a serious health threat resulting in some 22 million new cases yearly and approximately 217,000 fatalities. Karen Brenneman and her colleagues at Arizona State University's Biodesign Institute have been examining ways to detect the presence of S. Typhi in stool following inoculation with various vaccine strains.