The primary structure of a protein also sometimes referred to as a polypeptide, is decided by sequences of amino acids. The amino acids are sequenced in a linear polypeptide chain which folds as it is being produced. it is this three - dimensional folded structure that decides the proteins biological activity.

Northwestern University scientists say Eyjafjallajökull and its massive cloud of volcanic ash have impacted mobility patterns in places far from Europe -- including the United States, India and southeast Asia.

The team compared the entire worldwide air transportation network before and after the 27 major European airports were closed and used complex network theory to compute and list the most affected airports still operating.

Most of the 350 million facebook users around the world spend more time searching for specific content than aimlessly browsing news feeds or friends lists, according to research conducted at the University of Missouri School of Journalism.

Researchers have dubbed the practices "social searching" and "social browsing."

 People engage in social searching when navigating facebook in search of certain information about a specific person, group, or event; users engage in social browsing, on the other hand, when surveying the general landscape, such as their newsfeed or wall, without looking for specific information.

Are you overweight? Do you want to slim down? Forget about exercising and dieting because there is actually a way to magically cure poor eating habits.

A new study examining the effects of psychological acupuncture suggests that the practice can reduce food cravings for up to six months in people who are overweight or obese.

The study did not show any significant impact on body weight or body mass index (BMI) after six months, but the results of a 12-month follow-up are still being analyzed, the authors say. Cross your fingers.

The results of the study will be presented at the International Congress of Applied Psychology in Melbourne in July.

Immunization against "swine flu" in 1976 might have partially protected some individuals from the 2009 pandemic H1N1 influenza virus, according to a new study in Clinical Infectious Diseases.

Researchers found that individuals who reported receiving the 1976 vaccine mounted an enhanced immune response against both the 2009 pandemic H1N1 virus and a different H1N1 flu strain that circulated during the 2008-09 flu season.

It is unclear if the response was enough to protect against the 2009 H1N1 virus, but the study points to a lingering benefit. The findings also raise hope that those vaccinated against the 2009 H1N1 pandemic strain might also enjoy a similar long-term advantage.

High-resolution visible and thermal infrared images captured by a joint NASA-Japanese satellite sensor have provided the first clear glimpse of the Icelandic volcano Eyjafjallajökull that began erupting last week.

The images, taken by NASA's Earth-orbiting Advanced Spaceborne Thermal Emission and Reflectance Radiometer (ASTER) instrument, show that although the volcano's infamous ash plume is receding, its internal temperature is rising.

Eyjafjallajökull appears on the left side of the images as a bright spot with a cloud emanating from it. More images are available here.

Sermeq Kujalleq - Jakobshavn Isbrae Retreat

The Jakobshavn Isbrae, or Jakobshavn glacier, now becoming known by its local name - Sermeq Kujalleq - has been observed retreating since about 1851.


Near the small town of Ilulissat, formerly Jakobshavn, Sermeq Kujalleq is the Northern hemisphere's largest glacier with an outlet to the sea.  It drains about 6.5% of Greenland's ice sheet. The ice stream's contribution to sea level rise is about 0.06 millimeters - about 0.002 inches - per year, roughly 4% of the 20th century rate of sea level increase.

The buzz in secular circles lately has been about a TED talk by Sam Harris, the author of The End of Faith,

Academics are being increasingly pressured to produce 'publishable' results and The quality of scientific research may be suffering as a consequence, according to a new PLoS ONE study.

The analysis of papers in all disciplines shows that researchers report more "positive" results for their experiments in US states where academics publish more frequently.

The suggestion that famous athletes serve as role models for underage fans is "rubbish," say researchers writing in Drug and Alcohol Review. The authors found that the loutish and drunken behavior of some pro athletes – routinely reported in the media – has little or no effect on the drinking habits of young people.

The research team asked more than 1,000 young sportspeople at elite and amateur level and non-sportspeople to report the perceived drinking behavior of high-profile sport stars compared with their friends, and then report their own drinking behavior using the World Health Organizations Alcohol Use Disorder Identification Test.