bacteria

Some tech just sounds too good to be true. A removable, wireless sensor that adheres to dental enamel and can detect trace amounts of harmful bacteria just might fall into the too-much-information category for the squeamish among us.

But the silk, gold, and graphene-based sensor that looks a bit like a temporary tattoo could play a key role in detecting and treating various diseases and conditions, the developers at Princeton University say.

"This is a real-time, wireless response from a sensor that can be directly interfaced with a variety of biomaterials," principal investigator Michael McAlpine, an assistant professor … Read more

In 2012, 100-watt incandescent bulbs will be a thing of the past, but fear not, as there's some great energy-efficient lightbulb tech to illuminate the way. It ranges from compact fluorescent lights to LEDs to halogen bulbs, and, if Philips has anything to do with it, bacteria-powered lights.

As part of its Microbial Home project, which also birthed the urban beehive, Philips set about designing a natural lighting system based on biological processes. The result? The Bio-light concept. … Read more

Poor mail carriers. Not only do they have to put up with threatening dogs and foul weather, but they spend their days touching what may be one of our dirtiest everyday objects: mailbox handles.

The only worse offender? Gas pump handles.

So says a new study by researchers at hygiene solutions firm Kimberly-Clark Professional, who took more than 350 swabs from a variety of everyday objects in Atlanta, Chicago, Dallas, Los Angeles, Miami, and Philadelphia to measure ATP (Adenosine Triphosphate) levels commonly used to detect contamination.

While they did not distinguish between contamination types (i.e. molds versus bacteria), they … Read more

In 12 cities across England this past spring, researchers took almost 400 samples from cell phones and hands on the hunt for bacteria.

The researchers--from the London School of Hygiene and Tropical Medicine and Queen Mary, University of London--found that 16 percent of both the phones and hands contained E. coli, a form of bacteria that inhabits our intestines and is typically spread through fecal matter.

At 400, the sample size is by no means large, but if those percentages are accurate, there is simply no getting around the conclusion: traces of our own poop and the resulting bacteria are hanging out on 1 in 6 of our phones and hands.… Read more

What do you get when you combine an Android smartphone, cell phone image sensor, Lego building blocks, and a handful of Caltech engineers and biologists? The ePetri, which isn't Petri Dish 2.0, but a full reworking of a technology that dates back to the late 1800s.

Traditionally, the Petri dish (named after German bacteriologist Julius Richard Petri) has been used in the medical field to identify bacterial infections by studying samples via microscope as the cultured cells grow in an incubator.

The Caltech researchers have a few choice words for such an approach in 2011, including "expensive," "labor-intensive," and "suboptimal." So they set out to improve not just the dish, but the entire process.… Read more

In this episode of Crave we have self-cleaning clothes, a poop-powered motorcycle, and an olde-tyme accessory for your iPhone. Plus, we introduce a new How To segment with CNET guru Rafe Needleman, and Eric rounds out the show by unraveling the influences of "The Matrix."

… Read more

Tossing clothes into the wash when dirty is so last year, thanks to a discovery by chemists out of the University of California at Davis. Near-ordinary cotton may simply need be exposed to light to get busy killing bacteria and breaking down toxic chemicals such as pesticide residues.

Ning Liu, a doctoral student at UC Davis, worked with textile chemists Gang Sun and Jing Zhu to develop a method that incorporates a compound (2-AQC) into cotton fabrics. When exposed to light, it produces reactive oxygen species such as hydrogen peroxide that kill bacteria and break down toxins.

While Liu says 2-AQC is more expensive than other compounds, it is difficult to remove from cotton due to strong bonding, and cheaper equivalents should work, too.

"The new fabric has potential applications in biological and chemical protective clothing for health care, food processing, and farm workers, as well as military personnel," she says.

The team reported on its findings in the Journal of Materials Chemistry last month, shortly before another study out of the University of Iowa chronicled the vast presence of even drug-resistant disease-causing bacteria on hospital curtains.… Read more

There hasn't been another major radioactive leak, but soon we could see flesh wounds glowing in the dark. Researchers at the University of Sheffield in the U.K. have developed a gel that glows under ultraviolet light when it comes in contact with many kinds of bacteria.

The gel also appears to be effective in fighting the bacteria at the same time.

"The polymers (in the gel) incorporate a fluorescent dye and are engineered to recognize and attach to bacteria, collapsing around them as they do so," Sheffield Professor Sheila MacNeil explains in a statement. "This change in polymer shape generates a fluorescent signal that we've been able to detect using a handheld UV lamp."

Project lead Dr. Steve Rimmer adds that the technology could help reduce the overuse of antibiotics. In testing, the gel has been able to detect the presence of serious bacterias including Salmonella, E. Coli, MRSA, and meningitis.… Read more

Earlier this year, researchers at the European Molecular Biology Laboratory in Heidelberg, Germany, published a study identifying genetic markers found in people's stomachs that appear related to obesity and other diseases.

After that, "I got between 50 and 100 e-mails from regular people having problems with the stomach or diarrhea and wondering if we can help them," Peer Bork, a biochemist at the lab, told Nature last week. "They were long e-mails. There must be a lot of frustrated people out there."

Given the interest level, Bork and his colleagues launched MyMicrobes, which could be … Read more