An LD50 is a ratio of  in milligrams (mg) of pesticide per kilogram (kg) of body weight that kills 50 percent of test animals - mice, bees, frogs, whatever. So it literally is Lethal Dose of 50…

This is the second in a series of topics on Chemical Bonds.hibr /> This is intended  for use in general chemistry classes. More particularly, for non-chemistry major and high school students…

Nasal drops of harmless bacteria can inhibit a related bug that sometimes causes meningococcal disease, according to new findings published online in Clinical Infectious Diseases. The study--…

A team of researchers has identified a new genetic cause of the disease by focusing on a rare genetic variant which offers important insights into the root causes of autism, they believe. And, they…

A study published today describes a newly-discovered, heritable genetic cause of acute lymphoblastic leukemia (ALL), namely mutation of the gene ETV6. Much like mutation of the gene BRCA marks people…

If you watch the season finale of The Walking Dead this Sunday, the story will likely evoke events from previous episodes, while making references to an array of minor and major characters. Such…

Writers, athletes and athletes can tell you that sometimes being too focused in a bad thing. You need to relax a little, especially if, as the old saying goes, being focused causes you to lose sight…

Bioplastics are used in medical applications such as wound healing dressings, sutures, catheter tubes and drug delivery and bioplastics made from protein sources such as albumin and whey have shown…

During the launch of the latest Soyuz to the space station Scott Kelly and Mikhail Kornienko calmly looked at an iPad.  Other than the cramped confines of the Soyuz capsule, and their space…

A new paper concludes that there is limited evidence to show that xylitol prevents dental cavities in children and adults. Xylitol is a natural sweetener that is widely promoted globally, and can be…