Showing Spotlights 1609 - 1616 of 2426 in category All (newest first):
Humans have always tried to improve themselves through 'natural methods' such as physical exercise, diet, meditation, education and training. However, as a new report on human enhancement points out, with ongoing work to unravel the mysteries of our minds and bodies, coupled with the art and science of emerging technologies, we are near the start of the Human Enhancement Revolution. Technology will be a big game changer. While previously technological progress has improved the tools we work with, from the printing press to the steam engine to computers, in the future, technology will change ourselves, our bodies and, possibly, even our minds. A new addresses questions and issues surrounding human enhancement, an area that will become more prominent as advances in nanotechnology, nanomedicine, bionics, synthetic biology and related fields move from the lab to real-world applications.
Sep 2nd, 2009
Much of EPA's focus over the past several years has been aimed at filling information gaps and gathering more data regarding the potential risks associated with nanomaterials, mostly through voluntary programs and agency-funded research. Recently, EPA has moved to quicken the pace of its regulatory efforts, through a series of actions taken under the authority of the Toxic Substances Control Act (TSCA). The agency has also fired a clear shot across the bow of the nanotechnology industry, warning producers and importers of nanoscale materials that the agency intends to pursue enforcement actions against companies that fail to heed EPA's new focus on regulating nanomaterials under TSCA. In light of these developments, companies with an interest in nanotechnology may want to reexamine the agency's recent regulatory initiatives, in order to gain a better understanding of how those actions might affect them.
Sep 1st, 2009
According to the World Health Organization, lung cancer is the leading cancer-related cause of death, accounting for 18 percent of cancer deaths and killing about 1.3 million people worldwide every year. Conventional diagnostic methods for lung cancer occasionally miss tumors and they are costly and unsuitable for widespread screening. Breath testing is a fast, non-invasive diagnostic method that links specific volatile organic compounds (VOCs) in exhaled breath to medical conditions. However, these techniques - gas chromatography/mass spectrometry, ion flow tube mass spectrometry, laser absorption spectrometry, infrared spectroscopy, polymer-coated surface acoustic wave sensors and coated quartz crystal microbalance sensors - are expensive, slow, and require complex instruments. A multidisciplinary research team at Technion - Israel Institute of Technology have now demonstrated a highly sensitive, stable, relatively inexpensive, and fast-response nine-sensor array that consists of gold nanoparticles functionalized with different organic groups that respond to various VOCs that are relevant to lung cancer.
Aug 31st, 2009
Previously we reported on self-healing nanotechnology anticorrosion coatings, a novel method of multilayer anticorrosion protection including the surface pre-treatment by sonication and deposition of polyelectrolytes and inhibitors. The main novelty of the proposed system was the multi-level protection approach, where the protective systems - the 'smart' multilayers - will not only be a barrier to external impacts, but also respond to changes in their internal structure, and combine in the same system different damage prevention and reparation mechanisms. The team now reports the development of laser-activated nanocontainers filled with corrosion inhibitors. With this new nanomaterial, the healing ability of anticorrosion agents is remotely activated by light.
Aug 27th, 2009
A Japanese-UK research team has now demonstrated that cryoEM image analysis may be exploited to obtain structural information of sufficient resolution to reveal the absolute three-dimensional (3D) configuration of a designed DNA nanostructure. With their technique they have obtained structural information at sufficient resolution to visualize the DNA helix and reveal the absolute stereochemistry of a self-assembled DNA tetrahedron. Each edge is a 7 nm, 20 base pair duplex, and the edges are connected covalently through single unpaired adenosine nucleotides, making it a rigid, triangulated structure that could serve as a building block for larger 3D structures or as a molecular cage. This DNA tetrahedron is the smallest 3D nanostructure made by DNA self-assembly.
Aug 25th, 2009
While biofilms are mostly seen from a point of view of pathogenic threats, their complex frameworks with biological behavior, chemical heterogeneity, and physical structure at micro- or even nanoscopic level, biofilms could also be useful in nanofabrication - each of these properties can be an attractive avenue for the development of nanotechnology and material science. Researchers at the Chinese Academy of Sciences have now systematically demonstrated the potential of biofilms for nanostructure engineering. Their research shows that, in principle, biofilms can be an efficient and low-cost approach for large-scale nanotechnology fabrication of various nanostructures.
Aug 24th, 2009
Sometimes we get bombarded with emails from people who are new to the field about certain aspects of nanotechnology - can it cure cancer? Where can I buy nanobots? What is a nanomaterial? Is nanotechnology dangerous? And so forth. You get the idea. The question asked most often is simply this: 'What is nanotechnology?' That's why we have decided to add a new segment to our Nanowerk website that we call 'Ten things you should know about nanotechnology'. What we have been trying to do here is to provide a brief overview of some important aspects and issues and answer some of the basic questions on nanotechnologies. Of course, there is lots of important information that we omitted. But we feel that, if you are new to nanotechnology, this is a good point to start.
Aug 20th, 2009
DNA origami, tiny shapes and patterns self-assembled from DNA, have been heralded as a potential breakthrough for the creation of nanoscale circuits and devices. One roadblock to their use has been that they are made in solution, and they stick randomly to surfaces - like a deck of playing cards thrown onto a floor. Random arrangements of DNA origami are not very useful; if they carry electronic circuits for example, they are difficult to find and 'wire-up' into larger circuits. A collaboration between Caltech and IBM research Almaden has found a way to position and orient DNA origami on surfaces by creating sticky patches in the shape of origami - as a demonstration they positioned and aligned triangular DNA origami on triangular sticky patches. This success knocks down one of the major roadblocks for the use of DNA origami in computer nanotechnology.
Aug 18th, 2009