Toronto, ON, Canada Titanium implants were successfully introduced by P.-I. Brånemark and co-workers in 1969 for therehabilitation of edentulous jaws. After 40 years of research and development, titanium is currently the most frequently usedbiomaterial in oral implantology, and titanium-based materials are often used to replace lost tissue in several parts of thebody.
WASHINGTON— In an article published today in the journal Science, a group of former senior federal officials call for the establishment of an independent Earth Systems Science Agency (ESSA) to meet the unprecedented environmental and economic challenges facing the nation. They propose forming the new agency by merging the National Oceanic and Atmospheric Administration (NOAA) and the U.S. Geological Survey (USGS).
Diversity among the ancestors of such marine creatures as clams, sand dollars and lobsters showed only a modest rise beginning 144 million years ago with no clear trend afterwards, according to an international team of researchers. This contradicts previous work showing dramatic increases beginning 248 million years ago and may shed light on future diversity.
CAMBRIDGE, Mass., July 3, 2008 -- Sirtris, a GlaxoSmithKline company focused on discovering and developing small molecule drugs to treat diseases of aging such as Type 2 Diabetes, is included among a research team that reported in today's online edition of Cell Metabolism that mice treated at middle-age to the end-of-life with resveratrol showed an overall health improvement, including improved bone health, a reduction in cataracts and cardiovascular dysfunction, and improved balance and motor coordination.
With the availability of the Internet, citizens are increasingly expected to search themselves for information on security risks in their living environment. Until now, however, too little was known about the willingness of citizens to do this and the factors that promote this information-seeking behaviour. The work of Dutch researcher Ellen ter Huurne suggests there are many factors which communication professionals should pay greater attention to.
Dutch Rubicon laureate Chris Smit has concluded that small mammals, such as rabbits and mice, play a major role in the development of natural diversity. Smit researched how scrub becomes established in natural grassland. It seems that prickly shrubs are important in protecting plants and preventing animal species from grazing. Smit has also demonstrated that natural disturbances such as flooding and animal diseases are very important for the diversity of natural areas.
International organisations frequently have high expectations about their interventions. Dutch researcher Mathijs van Leeuwen's work on peacebuilding reveals the need to exhibit modestly and to link into local agendas. Instead of wanting to realise ambitious programmes and to take the lead in social change, international organisations must instead try to be partners in peace.
AUSTIN, Texas—A dynamic way to alter the shape and size of microscopic three-dimensional structures built out of proteins has been developed by biological chemist Jason Shear and his former graduate student Bryan Kaehr at The University of Texas at Austin.
Shear and Kaehr fabricated a variety of detailed three-dimensional microstructures, known as hydrogels, and have shown that they can expand and bend the hydrogels by altering the chemistry of the environment in which they were built.
BATON ROUGE LSU associate professor of sociology Troy C. Blanchard recently found that a community's religious environment that is, the type of religious congregations within a locale affects mortality rates, often in a positive manner. These results were published in the June issue of Social Forces, a leading journal in the field of sociology.