Bio and Medicine
A Texas scientist has discovered that a special metal coating could allow contact lens wearers to keep their lenses in for longer periods of time. Coating contacts with a one-molecule-thick layer of selenium, an antibacterial metal, keeps them bacteria-free for at least two months, says Ted Reid of Texas Tech University Health Sciences Center in Lubbock. Although selenium can be toxic to humans in large quantities, these lenses would apparently be safe, with less selenium than you'd find in an average lunch. Reid hopes the coating could be used on other internal devices, like heart valves and catheters, and even suggests selenium-coated molecules could be used to keep people exposed to HIV from becoming infected. In other eye news, new eye-tracking software developed by scientists at Cambridge University could help computer users with disabilities write more quickly, accurately, and comfortably than before.
Following devastating floods that submerged central Prague in water and caused 200,000 Czechs to leave their homes, the Czech government said it will be vaccinating 65,000 children against hepatitis A -- a liver disease that can spread when sewage systems are damaged and infected feces enters the drinking water. The Czech Republic's health minister has also asked the government to provide 3.5 million euros for other public health measures. The flooding has killed more than 100 people across Europe and caused billions of euros' worth of damage. It's not just the people who are hurting -- in the Czech Republic 100 animals died during the evacuation of Prague Zoo.
The genome of the pufferfish, a Japanese delicacy, is teaching researchers about the more complex genetic makeup of humans. The pufferfish, or Fugu, has about the same number of genes as humans, but without most of the repetitive "junk" DNA found in naked apes, researchers at the Joint Genome Institute in Walnut Creek, California, report. Fugu can pack a lethal tetrodotoxin whallop, but manages to do so with the smallest genome of any vertebrate. The findings were detailed in the journal Science and reported on by the Associated Press.
New research suggests a population's health is not necessarily improved by more trips to the doctor. Couple this with a recent Chicago Tribune report that hospital-borne infections have become the no. 4 killer in America and you've got cause for pause before seeing your sawbones.
Business 2.0 has a compelling read in its July issue. "The Technology Secrets of Cocaine Inc." looks at the IT infrastructure the Cali cartel has built to help manage its vast cocaine smuggling and sales empire. Particularly chilling is the organization's use of data mining software to sift through phone records of its own operatives and the entire Cali phone exchange to see if any members were actually snitching to the authorities on the side. "They could correlate phone numbers, personalities, locations --- any way you want to cut it," said a former director of a law enforcement agency. "[Cali cocaine cartel leader Jos?] Santacruz could see if any of his lieutenants were spilling the beans." At the heart of the system was a $1 million IBM AS400 mainframe. Observed one high-level DEA official: "It is very reasonable to assume that people were killed as a result of this capability. Potential sources of information were compromised by the system."
Science Blog reported earlier this week on a study suggesting a connection between use of an early cell phone standard and brain tumors. A separate study announced today says that no link has been found between radio emissions from mobile phones and the growth of tumors in mice. The Australian study contradicts yet another, earlier investigation that did find a connection. No word on what sort of calling plan the recent mice were allowed in the three year experiment.
A new study suggests smallpox vaccine immunity may last far longer than expected. Scientists had believed that the vaccine generally only conferred protection from the deadly virus for about a decade. But a study released this week found evidence that people may be covered for 35 years or more, meaning many Americans could retain some level of immunity. The study looked at blood samples from laboratory workers who had been immunized in the last five years and those who had been vaccinated up to 35 years earlier.
Meat-eating is on the rise around the globe, a trend that could raise the risk of animal disease spread across borders, the Food and Agriculture Organization of the United Nations (FAO) said this week in a document circulated at a meeting on meat and dairy products. Worldwide meat consumption is expected to grow by 2 percent each year until 2015 -- the result of population increases, rising incomes, and the movement of people from rural areas to cities. "However, increased volume of trade and improvements in transportation, infrastructure and technology hold potential risks of spreading of animal diseases rapidly worldwide," FAO warned.
