Common bacteria with an overt reaction to toxins that cause oxidative stress show promise as a biosensor to predict public health threats.

At the 233rd American Chemical Society national meeting in Chicago March 25-29, researchers from Virginia Tech and the Edward Via Virginia College of Osteopathic Medicine (VCOM) reported their work on a bacteria biosensor prototype and correlations to brain tissue damage.

Platinum might outweigh gold in the jewelry market, but as part of an ongoing effort to produce efficient and affordable fuel cells, scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory are studying how gold atoms might enhance the value of the pricier metal. Specifically, they're looking for ways to use gold to prevent the destruction of platinum in the chemical reactions that take place in fuel cells. Brookhaven chemist Radoslav Adzic will describe this research during the 233rd National Meeting of the American Chemical Society on Tuesday, March 27, 2007, in Chicago, Illinois.

A mother’s high beef consumption while pregnant was associated with lower sperm counts in her son, according to a study led by researchers at the University of Rochester.

Researchers sought to examine the relationship between semen quality and long-term risks from growth hormones and other chemicals in beef. While the study results revealed a significant link between the lowest sperm counts and mothers who were the highest beef consumers (seven or more beef meals per week), researchers could not pinpoint hormones, pesticides or other environmental chemicals in the animal fat as a direct cause.

People are mixing supplements, herbs and over-the-counter medications and prescription drugs to cure themselves of ills, unaware that they could be making themselves sicker, says George Grossberg, M.D., director of the division of geriatric psychiatry at Saint Louis University.

Dr. Grossberg is about to change all that. He is the co-author of a new book, "The Essential Herb-Drug-Vitamin Interaction Guide," which is a comprehensive listing of what various herbs and supplements do, possible side effects and how they might interact with other medications and foods.

Researchers believe they have solved a mystery that has puzzled evolutionary scientists for years ... if 'good' genes spread through the population, why are individuals so different? 

The so-called 'lek paradox', that sexually-selecting species like humans should have much less individuality than is the case, has been seized upon by creationists as an argument that Darwin's theories are fundamentally flawed.

The problem is that if females select the most attractive mates, the genes responsible for attractive features should spread quickly through a population, resulting in males becoming equally attractive, to the point where sexual selection could no longer take place. 

The good news: improved health care is reducing occurrences of intestinal parasites worldwide. The bad news: at the same time, rates of asthma are increasing worldwide. The link between these trends? Evolution – human evolution. The human immune system has evolved in the constant presence of intestinal parasites. The immune system is designed to react to these parasites – in their absence, the immune system overreacts to simple allergens, resulting in asthma. Its evolved state is mismatched to modernity. Similar mismatches produce increased risk of diabetes, obesity, and cardiovascular disease in modern adult populations. Globalization is making understanding these types of complex evolutionary relationships more relevant in medicine as human environments change.