Calcium and Lead: should you worry?
...pplements to prevent osteoporosis. Now a new study uncovers detectable levels of lead in some of the leading supplements. Whats a woman to do? According to the January issue of Mayo Clinic Womens HealthSource, most of these levels are not high enough to cause significant harm, so women should keep taking thei......allow for head and trunk formation. This discovery uncovers a surprisingly simple mechanism of vertebrate head and trunk specification. BMP hormones act as morphogens; they are molecules that specify cell fate in a concentration-dependent manner. Gradients of BMP activity in the embryo determine the body axis...HIV spreads in therapy-resistant cells
MINNEAPOLIS / ST. PAUL--In a finding that uncovers a new obstacle to preventing or eradicating AIDS, researchers at the University of Minnesota and seven other institutions have found that HIV-1, which is usually transmitted by heterosexual contact, infects and replicates in immune cells whose relati...Revealing the complex patterns of cardiac disease
Multifractal analysis uncovers differences between healthy and unhealthy hearts (Boston, Mass.) - In a paper published in Nature this week, scientists fromBoston University's Center for Polymer Studies describe a new technique derivedfrom modern physics that can help doctors dis...Molecular Mechanism For Evolution Described
...r climate changes. "The way that Hsp 90 covers and uncovers hidden genetic variations providesa very plausible mechanism for revealing variation for natural selectionto act upon. Proving that it actually functions on an evolutionary timescale, however, will be no easy task," says Lindquist....Discovery Of Mutation May Lead To Help For Male Fertility Problems
...sis, the processthat produces sperm. "This uncovers a new point in the regulation of sperm production," saidZinn, who is an investigator in the Eugene McDermott Center for Human Growth andDevelopment. "A difference in this mutation compared with other mousereproductive mutations is that it is selectiv...Presence Of Protein Extends Life; Potential Aging Mechanism Found
...ly's life span at normal temperatures. The finding uncovers a potentialmechanism for aging because the capacity to moderate stress is a centralfunction to regulating that aging mechanism. In the study, Marc Tatar and colleagues from the University of Minnesotaexposed fly strains to short doses of nonlethal...