Showing Spotlights 9 - 16 of 19 in category All (newest first):
Talking about the threat of terrorists using bioweapons is a great tool for scaring people. Using any kind of pathogen (bacterium, virus or other disease-causing organism) as a weapon certainly is a terrifying scenario; think about the near-panic the 2001 anthrax attacks in the United States caused. Letters containing anthrax spores were mailed to several news media offices and two U.S. Senators, killing five people and infecting 17 others. Can you image what panic would result from an attack that kills 5,000 people and causes 76 million illnesses? Well, as a matter of fact, foodborne diseases cause approximately 76 million illnesses, 325,000 hospitalizations, and 5,000 deaths in the United States each year. Known pathogens account for an estimated 14 million illnesses, 60,000 hospitalizations, and 1,800 deaths. The Food and Drug Administration's 2005 Food Code states that the estimated cost of foodborne illness is $10-$83 billion annually. So while the U.S. spends billions of dollars securing its borders, it loses many more billions, not to mention thousands of lives, every year by not being able to keep its spinach and hamburgers safe. Apparently, talking about terrorism is much better political theater (and makes for catchier Nanowerk Spotlight titles) than discussing E. coli outbreaks. However, be it because of potential terrorists or actual contaminated food, research in microbial detection and decontamination processes increased significantly over the past years. Traditional methods of identifying and subsequently removing a pathogen are slow and cumbersome. Now, using nanotechnology, researchers have designed a novel biosensing system that can identify E. coli in just five minutes and remove up to 88% of the target bacteria.
Dec 3rd, 2007
Flawed government thinking is driving a rapid expansion in the military influence over science and technology, says a new briefing from Scientists for Global Responsibility (SGR). US government spending on military research and development is soaring (up 57% since 2001), while the UK government has rolled out two new military technology strategies in the last two years. Factors such as these are contributing to an expansion of military involvement in US and UK universities. As far as nanotechnology is concerned, and as we have reported here before, the military is the largest investor in the U.S. Nanotechnology Initiative (NNI). The Department of Defense (DoD)'s share of the $6.6 billion NNI budget since the program's inception is over 30%, or $2 billion. While a part of this military research spend goes to the internal laboratories of the various parts of the armed services (navy, army, air force) and DARPA, another parts goes to universities as research grants or as part of MURI (Multi-University Research Initiative). The SGR, in its new briefing, documents how government funding for military research and development dwarfs that spent on social and environmental programs across the industrialized world. The group highlights how the military involvement in research continues to support a narrow weapons-based security agenda. SRG argues that this marginalizes a broader approach to security, which would give much greater priority to supporting conflict prevention by helping to address the roots of conflict. As part of this case, they point out how research that aims to help tackle poverty, climate change and ill-health - and thus help to provide basic security for human populations - is under-funded compared with military research.
Aug 22nd, 2007
The U.S. Department of Defense (DoD) has released its 2007 review of DoD nanotechnology programs. In 2007, estimated DoD nanotechnology expenditures will be $417m, about the same level as the year before. For the first time, however, the report lists the congressional additions to DoD's investment in nanotechnology. From 2005 to 2007, the Pentagon has requested about $350 million each year for its nanotechnology research. Congressional earmarks of $75.6 million in 2006 (actual) and $63 million in 2007 (estimate) have substantially increased this budget and given the Pentagon more money - and programs - than it actually asked for. The Pentagon report even states that "Congressional additions significantly complicate the assessment of current and proposed funding levels for the DoD investment in nanotechnology, since these Congressional appropriated programs commonly avoid the standard agency technical scrutiny. Furthermore, Congressional additions are often inconsistent with, or even in direct opposition to, the technical focus areas and directions of DoD agencies." Makes you almost feel sorry for the military... but it is yet another perfect example of how warped (sorry, can't use a stronger word here) the U.S. Congressional budget system has become.
Jun 20th, 2007
In an effort to detect biological threats quickly and accurately, a number of detection technologies have been developed. This rapid growth and development in biodetection technology has largely been driven by the emergence of new and deadly infectious diseases and the realization of biological warfare as new means of terrorism. To address the need for portable, multiplex biodetection systems a number of immunoassays have been developed. An immunoassay is a biochemical test that measures the level of a substance in a biological liquid. The assay takes advantage of the specific binding of an antigen to its antibody, the proteins that the body produces to directly attack, or direct the immune system to attack, cells that have been infected by viruses, bacteria and other intruders. Physical, chemical and optical properties that can be tuned to detect a particular bioagent are key to microbead-based immunoassay sensing systems. A unique spectral signature or fingerprint can be tied to each type of bead. Beads can be joined with antibodies to specific biowarfare agents. A recently developed novel biosensing platform uses engineered nanowires as an alternative substrate for immunoassays. Nanowires built from sub-micrometer layers of different metals, including gold, silver and nickel, are able to act as "barcodes" for detecting a variety of pathogens, such as anthrax, smallpox, ricin and botulinum toxin. The approach could simultaneously identify multiple pathogens via their unique fluorescent characteristics.
Mar 8th, 2007
As their name suggests, nerve agents attack the nervous system of the human body. All such agents function the same way: by interrupting the breakdown of the neurotransmitters that signal muscles to contract, preventing them from relaxing. Nerve agents, depending on their purity, are clear and colorless or slightly colored liquids and may have no odor or a faint, sweetish smell. They evaporate at various rates and are denser than air, so they accumulate in low areas. Nerve agents include tabun(GA), sarin(GB), soman(GD), and VX. The military has a number of devices to detect nerve agent vapor and liquid. Current methods to detect nerve agents include surface acoustic wave (SAW) sensors, conducting polymer arrays, vector machines, and the most simple, color change paper sensors. Most of these systems have have certain limitations including low sensitivity and slow response times. By using readily synthesized network films of single-walled carbon nanotube bundles researchers have built a sensor capable of detecting G-series nerve agents such as Soman and Sarin (Sarin was used in the Tokyo subway terrorist attack in 1995). This research opens new opportunities in the design of real-time chemical warfare agent (CWA) sensors with independent response signatures.
Jan 29th, 2007
Due to the the increased use of modern bombs in terrorist attacks worldwide, where the amount of metal used is becoming very small, the development of a new approach capable of rapidly and cost-efficiently detecting volatile chemical emission from explosives is highly desirable and urgently necessary nowadays. The trained dogs and physical methods such as gas chromatography coupled to a mass spectrometer, nuclear quadrupole resonance, electron capture detection as well as electrochemical approaches are highly sensitive and selective, but some of these techniques are expensive and others are not easily fielded in a small, low-power package. As a complementary method, however, chemical sensors provide new approaches to the rapid detection of ultra-trace analytes from explosives, and can be easily incorporated into inexpensive and portable microelectronic devices. Researchers in PR China have developed a nanocomposite film that shows very fast fluorescence response to trace vapors of explosives such as TNT, DNT or NB.
Dec 13th, 2006
Carbon nanotubes (CNTs) have great potential applications in making ballistic-resistance materials. The remarkable properties of CNTs makes them an ideal candidate for reinforcing polymers and other materials, and could lead to applications such as bullet-proof vests as light as a T-shirt, shields, and explosion-proof blankets. For these applications, thinner, lighter, and flexible materials with superior dynamic mechanical properties are required. A new study by researchers in Australia explores the energy absorption capacity of a single-walled carbon nanotube under a ballistic impact. The result offers a useful guideline for using CNTs as a reinforcing phase of materials to make devices to prevent from ballistic penetration or high speed impact.
Nov 22nd, 2006
All major powers are making efforts to research and develop nanotechnology- based materials and systems for military use. Asian and European countries, with the exception of Sweden (Swedish Defence Nanotechnology Programme), do not run dedicated programs for defense nanotechnology research. Rather, they integrate several nanotechnology- related projects within their traditional defense-research structures, e.g., as materials research, electronic devices research, or bio-chemical protection research. Not so the U.S. military. Stressing continued technological superiority as its main strategic advantage, it is determined to exploit nanotechnology for future military use and it certainly wants to be No. 1 in this area. The U.S. Department of Defense (DoD) is a major investor, spending well over 30% of all federal investment dollars in nanotechnology. Of the $352m spent on nanotech by the DoD in 2005, $1m, or roughly 0.25%, went into research dealing with potential health and environmental risks. In 2006, estimated DoD nanotechnology expenditures will be $436m - but the risk-related research stays at $1m.
Nov 13th, 2006