An investigation into a potentially dangerous blunder at a government lab found that a scientist kept silent about the accident and revealed it only after other employees noticed something fishy. Officials on Friday released the results of an internal probe into the accident, which happened in January at the Centers for Disease Control and Prevention in Atlanta.
Port scanners are programs that search the Internet for systems that exhibit potential vulnerabilities. According to report published online, Hacienda is one such port scanning program. The report says that this program is being put into service by the "Five Eyes," a federation of Western secret services. Scientists have developed free software that can help prevent this kind of identification and thus the subsequent capture of systems.
An international team of scientists has shown that an antibody against the protein EphA3, found in the micro-environment of solid cancers, has anti-tumor effects. As EphA3 is present in normal organs only during embryonic development but is expressed in blood cancers and in solid tumors, this antibody-based approach may be a suitable candidate treatment for solid tumors.
RNA origami is a new method, developed by researchers from Denmark and California, for organizing molecules on the nanoscale. Using just a single strand of RNA, many complicated shapes can be fabricated by this technique. Unlike existing methods for folding DNA molecules, RNA origamis are produced by enzymes and they simultaneously fold into pre-designed shapes.
Previous research into the health impacts of in utero exposure to the 9/11 dust cloud on birth outcomes has shown little evidence of consistent effects. But according to a new paper pregnant women living near the World Trade Center during 9/11 experienced higher-than-normal negative birth outcomes. These mothers were more likely to give birth prematurely and deliver babies with low birth weights.
Researchers in Texas have successfully used a new gene editing method to correct a mutation that leads to Duchenne muscular dystrophy (DMD) in a mouse model of the condition. The technique is called CRISPR/Cas9-mediated genome editing, and can precisely remove a mutation in DNA, allowing the body’s DNA repair mechanisms to replace it with a normal copy of the gene.
In the age of big data, visualization tools are vital. With a single glance at a graphic display, a human being can recognize patterns that a computer might fail to find even after hours of analysis. But what if there are aberrations in the patterns? Or what if there’s just a suggestion of a visual pattern that’s not distinct enough to justify any strong inferences? Or what if the pattern is clear, but not what was to be expected?
A commercial cargo ship has ended its monthlong space station visit. Astronauts aboard the International Space Station released the Cygnus supply ship, now full of trash for disposal early Friday. They parted company 260 miles above Africa's southwest coast. Orbital Sciences Corp. launched the Cygnus from Virginia in mid-July under a NASA contract.
Scientists are racing to begin the first human safety tests of two experimental Ebola vaccines, but it won't be easy to prove that the shots and other potential treatments in the pipeline really work. There are no proven drugs or vaccines for Ebola, a disease so rare that it's been hard to attract investments in countermeasures. But the current outbreak in West Africa is fueling new efforts to speed Ebola vaccine and drug development.
A new technique has demonstrated for the first time that the size of molecules penetrating the blood-brain barrier can be controlled using acoustic pressure. The innovative ultrasound approach uses acoustic pressure to let molecules through, and may help treatment for central nervous system diseases like Parkinson’s and Alzheimer’s.
Conventional wisdom holds that the cytoplasm of mammalian cells is a viscous fluid, with organelles and proteins suspended within it, jiggling against one another and drifting at random. However, a new biophysical study led by researchers at Harvard Univ. challenges this model and reveals that those drifting objects are subject to a very different type of environment.
A research team in Europe has achieved significantly increase in the yield of hydrogen produced by the photocatalytic splitting of water. Their breakthrough in light-driven generation of hydrogen was achieved by using a novel molecular shuttle to enhance charge-carrier transport with semiconductor nanocrystals.
Researchers at the Univ. of California, Santa Cruz have developed a new approach for studying single molecules and nanoparticles by combining electrical and optical measurements on an integrated chip-based platform. In a paper published in Nano Letters, the researchers reported using the device to distinguish viruses from similarly-sized nanoparticles with 100% fidelity.
Chip designers are facing both engineering and fundamental limits that have become barriers to the continued improvement of computer performance. Have we reached the limits to computation? In a review article in Nature, Igor Markov of the Univ. of Michigan reviews limiting factors in the development of computing systems to help determine what is achievable, identifying "loose" limits and viable opportunities for advancements.
Scientists at Yale Univ. have developed a novel cancer immunotherapy that rapidly grows and enhances a patient’s immune cells outside the body using carbon nanotube-polymer composites; the immune cells can then be injected back into a patient’s blood to boost the immune response or fight cancer.