A lizard adaptation to the jungle may soon appear in an altered form in operating rooms. Gecko feet are covered with a complex landscape of ridges that allow them to cling to various materials at the microscopic level. Inspired by this observation in nature, MIT researchers have devised a waterproof adhesive bandage for patching up internal injuries and surgical wounds. MIT Professors Robert Langer and Jeff Karp described their work in the Feb 11 issue of the Proceedings of the National Academy of Sciences.
Scientists in South Australia devised a more effiecient and less expensive method to purify water using technology at the nano level. Researchers at the Ian Wark Research Institute at the University of South Australia hope to provide an answer to our currently foreboding drinking water crisis.
"Fire on the roof, dial 911!" someone yells at the top of their lungs. This urgent cry,while usually causing panic and confusion, also generates awareness of present danger. Humans have become adept at warning each other through recognizable calls of alarm. Klaus Zuberbühler and colleague Kate Arnold of the University of St. Andrews have found that monkeys combine calls to make them meaningful in the same way that humans do.
Researchers from the University of Florida have found that a protein known as Bc12 (found in high levels in lung cancer patients who smoke) actually helps cancer cells in the lungs to resist chemotherapy and to live much longer than they normally would, following subjection to chemotherapy. The study, published in the February 29 edition of the journal Molecular Cell explains how the protein does this by blocking the ability of healthy cells to repair themselves following damage by radiation or chemicals (such as nicotine).
Aspirin-like drugs may have a role in treating breast cancer, according to a review of multiple studies published in the March issue of the International Journal of Clinical Practice. This finding offers hope in an age when it is expected that one in eight women will be diagnosed with the disease. Ian Fentiman of London's Guy's Hospital found that the use of nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin and ibuprofen, may reduce the incidence of breast cancer by up to 20 percent.
A study published in the March 14 edition of the journal Science documents the latest discovery about sand dollars. Scientists have previously known that sand dollar larvae can clone themselves and split into two new sand dollars, but no one had connected such an act to a survival technique. Biologists at the University of Washington now have evidence that four day-old sand dollar larvae create clones of themselves within 24 hours of being exposed to fish mucus, a signal that predators are present.
Plant biologist Arthur Grossman and colleagues of the Carnegie Institution in Stanford, CA released surprising findings that put a new spin on one of the oldest and most important molecular pathways on earth. Two billion years ago, bacteria evolved that were capable of consuming atmospheric carbon dioxide to produce energy while releasing oxygen gas as a byproduct in a process known as photosynthesis.
We tend to think of globalization in terms of the beneficial technological advances that have made this world "flatter" and "smaller". Humans, products, and services can travel from one place on Earth to just about anywhere else in much shorter times and in greater numbers. Yet, there is a human face to globalization too, an inhuman one indeed. The United Nations estimates that about 1 million children are trafficked across borders, many of them as sex slaves.
Stem cells have recently been heralded as being the key to ending a great number of the world's maladies. Stem cells' functions range from tissue repair to the formation of the entire human body. Most stem cell research presently focuses on harnessing the powers of stem cells and using their plasticity to create new cells to replace damaged ones. Once this is realized, many degenerative diseases as we know them will probably be history. However, the pessimists amongst us have long suspected that this was all too good to be true. What happens when these miracle cells stop working properly? Cancer.
In elementary school, children are taught the importance of milk and how it can help them grow strong and healthy bones. Although this tutorial may seem simple or even silly, it is important to realize that not all children receive this lesson from a young age. In fact, some may never receive this information at all.
The term "acoustics," derived from the Greek ακουστός, or "able to be heard," refers to the branch of science dealing with the study of sound. As sound and hearing undoubtedly play crucial roles in our modern society,influencing culture, technology, communication, and even our very survival,the applications of acoustics are virtually limitless.
Eta Carinae is a massive star known for its diverse population of circumstellar ejecta. One specific component of Eta's ejecta with a radial velocity of -513 km/sec has been found to be conducive to the formation of molecules, and CH and OH have most likely been identified there. We first undertook statistical equilibrium modeling with the most recent version of the photoionization code CLOUDY to find the range of physical parameters that would explain the abundances of the observed species in the -513 km/sec component.
Acoustic wave sensors have promising applications in fields such as medicine, law enforcement, and agriculture. In the field of medicine, acoustic wave biosensors can be used to detect the presence of protein markers in patients with certain types of cancer. In developing these devices, resonance frequency tracking is important for testing their functionality. Traditionally, oscillator circuits are used for tracking the resonance frequency of acoustic sensors. However, these oscillator circuits are costly and difficult to adapt to the different frequency ranges of acoustic sensors.