feed info

225,709 articles from PhysOrg

Negativity is contagious, study finds

Though we may not care to admit it, what other people think about something can affect what we think about it. This is how critics become influential and why our parents` opinions about our life choices continue to matter, long after we`ve moved out. But what kind of opinions have the most effect" An important new study in the Journal of Consumer Research reveals that negative opinions cause the...

New Material May Lead To Advances In Quantum Computing

Scientists at Florida State University`s National High Magnetic Field Laboratory and the university`s Department of Chemistry and Biochemistry have introduced a new material that could be to computers of the future what silicon is to the computers of today.

Salmonid hatcheries cause 'stunning' loss of reproduction

The rearing of steelhead trout in hatcheries causes a dramatic and unexpectedly fast drop in their ability to reproduce in the wild, a new Oregon State University study shows, and raises serious questions about the wisdom of historic hatchery practices.

Simplest circadian clocks operate via orderly phosphate transfers

Researchers at Harvard University and the Howard Hughes Medical Institute have found that a simple circadian clock found in some bacteria operates by the rhythmic addition and subtraction of phosphate groups at two key locations on a single protein. This phosphate pattern is influenced by two other proteins, driving phosphorylation to oscillate according to a remarkably accurate 24-hour cycle.

XM, Sirius Shareholders to Vote on Deal

(AP) -- Shareholders of the nation's only two satellite radio companies are scheduled to vote Nov. 13 on Sirius Satellite Radio Inc.'s proposed multibillion-dollar acquisition of XM Satellite Radio Holdings Inc.

How emotionally charged events leave their mark on memory

Researchers have uncovered new evidence in mice that may explain how emotionally charged situations can leave such a powerful mark on our memories. Surges of the stress hormone norepinephrine (also known as noradrenaline) that often accompany strong emotions spark a series of molecular events that ultimately strengthen the connections between neurons, the team reports in the October 5, 2007, issue...

Researchers test stem cell therapy for heart patients

University of Florida doctors on Wednesday treated their first patient enrolled in a new study designed to test whether injecting stem cells into the heart helps restore blood flow to the organ by prompting new blood vessels to grow.

Microfossils disclose geologic history of eastern California

The Bird Spring Shelf in southeastern California and basins to the west reveal a complex history of late Paleozoic sedimentation, sea-level changes, and deformation along the western North American continental margin. A new book published by the Geological Society of America captures insights into the tectonics and paleogeography of the region.

Starting university may be hazardous to your health: study

Moving away from home and adapting to a new social environment are just two of the many challenges that new students face as they enter university. An innovative new study conducted at the University of Alberta has found that these challenges can actually have a negative effect on a student's health.

In birds, expecting to mate leads to higher fertilization rates

From an evolutionary perspective, the primary task of an organism is to pass along its genes to future generations. Such genetic transmission is usually assumed to be instinctive. However, a new study shows that species also learn to adapt to their surroundings in order to increase their “reproductive fitness”— the likelihood that they will successfully reproduce.

Evidence of a relationship between swimming babies and infections

Scientists of the GSF-National Research Center for Environment and Health found indications for an association between attendance of swimming pools in the first year of life and the frequency of infections. Diarrhea and otitis media during the first year of life are especially noteworthy. No increased risks were found for atopic diseases during the first six years.

Giant Magellan telescope site selected

The Giant Magellan Telescope (GMT) Consortium announces that the GMT will be constructed at Cerro Las Campanas, Chile. This location was selected for its high altitude, dry climate, dark skies, and unsurpassed seeing quality, as well as its access to the southern skies.

Microsoft Launches Health Records Site

(AP) -- Microsoft Corp. launched a Web site Thursday for managing personal health and medical information, jumping into an industry whose digital future is clouded by privacy worries.

Unveiling the structure of microcrystals

Microcrystals take the form of tiny grains resembling powder, which is extremely difficult to study. For the first time, researchers from the European Synchrotron Radiation Facility (ESRF) and the Centre National de Recherche Scientifique used X-ray diffraction at the synchrotron to determine the structure of microcrystal grains of one cubic micrometre. They gained a factor of a thousand on the...

Stomach stem cell discovery could bring cancer insights

Scientists have identified and described stem cells specific to several tissues and organs of the body — key master cells that give rise to the specialized cell types characteristic of that organ. But to date, it hasn`t been possible to pinpoint functioning stem cells in the stomach, either in laboratory animals or people.