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Toward a better material for hip replacement and other joint implants

In an advance toward a new generation of improved hip and other joint replacements, scientists are describing development of a potential implant material that flexes more like natural bone, fosters the growth of bone that keeps implants firmly in place and is less likely to fail and require repeat surgery. Their study on these so-called tantalum nanotube materials appears in ACS Applied Material &...

Ultra-distant galaxy spied amidst cosmic 'Dark Ages'

With the combined power of NASA's Spitzer and Hubble Space Telescopes, as well as a cosmic magnification effect, a team of astronomers, including Carnegie's Daniel Kelson, have spotted what could be the most distant galaxy ever seen. Light from the young galaxy captured by the orbiting observatories was emitted when our 13.7-billion-year-old universe was just 500 million years old. Their work is...

Using a laser to 'see' the smallest world

A multi-university team has employed a high-powered laser based at UC Santa Barbara to dramatically improve one of the tools scientists use to study the world at the atomic level. The team used their amped-up electron paramagnetic resonance spectrometer to study the electron spin of free radicals and nitrogen atoms trapped inside a diamond.

Vall d’Hebron, VHIO and SOLTI head up an international 'dream team' against breast cancer

The Vall d'Hebron Breast Cancer Unit, the Vall d'Hebron Institute of Oncology and SOLTI, an academic breast cancer research group , are heading up a multi-center international study involving four Spanish and three North American research centers. The aim of the study is to investigate whether BKM120, a drug that inhibits the PI3K pathway (phosphatidylinositol-3-Kinase) can be an effective...

War causes mental illness in soldiers

One in every two cases of post-traumatic stress disorder in soldiers remains undiagnosed. This is the conclusion reached by Wittchen et al. in the current issue of Deutsches Arzteblatt International (Dtsch Arztebl Int 2012; 109(35): 559). A second original article published in this special issue, by Kowalski and colleagues, shows that more female soldiers than males contact the German army's...

Weight gain worry for stressed black girls

Could the impact of chronic stress explain why American black girls are more likely to be overweight than white girls? According to Dr. Tomiyama of the University of California, Los Angeles in the US, and her colleagues, higher levels of stress over 10 years predict greater increases in body weight over time in both black and white girls. However, the experience of chronic stress appears to have a...

World record holder

Northwestern University scientists have developed a thermoelectric material that is the best in the world at converting waste heat to electricity. This is very good news once you realize nearly two-thirds of energy input is lost as waste heat. The material could signify a paradigm shift. With a very environmentally stable material that is expected to convert 15 to 20 percent of waste heat to...

Your memory is like the telephone game

Your memory is a lot like the telephone game, according to a new study. Every time you remember an event from the past, your brain networks change in ways that can alter the later recall of the event. The next time you remember it, you might recall not the original event but what you remembered the previous time. The Northwestern study is the first to show this and has implications for witnesses...