Researchers say obesity is associated with lower prostate specific antigen (PSA) levels in men, making the screening test likely to produce unreliable results in this population. The full study is published in the March 1, 2005 issue of CANCER (http://www.interscience.wiley.com/cancer-newsroom), a peer-reviewed journal of the American Cancer Society.
Since the use of early detection tests for prostate cancer became relatively common (about 1990), the prostate cancer death rate has dropped. But it is still unclear whether the drop is a direct result of screening. Studies are underway to try to determine if early detection tests for prostate cancer in large groups of men will lower the prostate cancer death rate.
Obesity, defined as a body mass index (BMI) over 30, is a growing public health issue in the U.S., and is associated with chronic diseases such as diabetes. A landmark American Cancer Society study in April 2003 added prostate cancer to the list of cancers linked to an unhealthy body weight, with men at the highest BMI at 34 percent higher risk. Studies also show obesity is associated with poor prognostic association as well. Obese men with prostate cancer are diagnosed at more advanced stages and have higher mortality rates. Hypotheses include tumorigenic links to elevated hormones, such as estrogen and insulin-like growth factor.
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Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
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Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
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