Wednesday, April 29, 2015

Fwd: Camera

'' When a crystal lattice is excited by a laser pulse, waves of jostling atoms can travel through the material at close to one sixth the speed of light, or approximately 28,000 miles/second. Scientists now have a new tool to take movies of such superfast movement in a single shot.

Researchers from Japan have developed a new high-speed camera that can record events at a rate of more than 1-trillion-frames-per-second. That speed is more than one thousand times faster than conventional high-speed cameras. Called STAMP, for Sequentially Timed All-optical Mapping Photography, the new camera technology "holds great promise for studying a diverse range of previously unexplored complex ultrafast phenomena," said Keiichi Nakagawa, a research fellow at the University of Tokyo, who worked to develop the camera with colleagues from an array of Japanese research institutions.

Conventional high-speed cameras are limited by the processing speed of their mechanical and electrical components. STAMP overcomes these limitations by using only fast, optical components.

Thursday, April 23, 2015

Fwd: Food

'Being dangerously overweight is all down to bad diet rather than a lack of exercise, according to a trio of doctors who have reopened the debate about whether food, sedentary lifestyles or both are responsible for the obesity epidemic.

In an article for a leading health journal the authors – who include British cardiologist Dr Aseem Malhotra, an outspoken critic of the food industry – accuse food and drink firms such as Coca-Cola of having wrongly emphasised how physical activity and sport can help prevent people becoming very overweight.

The truth, they say, is that while physical activity is useful in reducing the risk of developing heart disease, dementia and other conditions, it "does not promote weight loss".


"In the past 30 years, as obesity has rocketed, there has been little change in physical activity levels in the western population. This places the blame for our expanding waistlines directly on the type and amount of calories consumed."

The authors add: "Members of the public are drowned by an unhelpful message about maintaining a 'healthy weight' through calorie counting, and many still wrongly believe that obesity is entirely due to lack of exercise." '


Sunday, April 19, 2015

Fwd: organic molecules

Complex organic molecules such as formamide, from which sugars, amino acids and even nucleic acids essential for life can be made, already appear in the regions where stars similar to our Sun are born. Astrophysicists from Spain and other countries have detected this biomolecule in five protostellar clouds and propose that it forms on tiny dust grains.

Antibiotic Effectiveness Boosted by Maple Syrup Extract

Thursday, April 2, 2015

Fwd: Baby Galaxies

'Astronomers stunned to discover massive clusters of baby galaxies in distant universe

Scientists have discovered the precursors to huge clusters of galaxies that are seen today, and it's all thanks to the European Space Agency's Herschel and Planck space observatories.

Astronomers have combined observations of the distant universe made by the Herschel and Planck space observatories to discover what led about to the huge galaxy clusters we see today, according to a Space Daily

Galaxies are rarely found floating on their own, and instead are usually found in large clusters of galaxies of tens or even hundreds. However, clusters like this haven't always existed, and the question has always plagued scientists: how and when did they form?

With these new insights, scientists should now be able to form better theories and gain new insight into how galaxy clusters evolved, including how dark matter influences these formations.

Astronomers used the Herschel and Planck observatories to peer deep into space and into the distant universe, examining what the universe looked like at 3 billion years old. Brenda Frye, an assistant astronomer at the University of Arizona's Steward Observatory who participated in conducting the research, said that scientists had discovered a cluster of galaxies that might be what a baby cluster would look like, according to the report.'