Bullish chemical could repel yellow fever mosquitoes
...N, Ind. -- A naturally occurring chemical that may repel yellow fever mosquitoes can now be made in the laboratory, Indiana University Bloomington scientists report. "The synthesis requires only seven steps," said organic chemist P. Andrew Evans, who led the research. "It should be quite trivial to scale t...Researchers show how to assemble building blocks for nanotechnology
...ches that are strongly directional and attract and repel specific parts of other particles, much like proteins do. This finding is important because the biggest impediment to developing nanotechnology is figuring out how to build the tiny structures, which are only as big as the smallest viruses. Because ......e a variety of bromine-based organohalogens, which repel predatory fish and prevent bacterial overgrowth, he says. These compounds are being studied to someday prevent barnacle growth on the underside of ships. Several other marine organohalogens have promising medicinal value, including treatment for canc......nd consequently have evolved complex strategies to repel these attackers. A detailed understanding of the mechanisms of the interactions between plants and insects will help to develop sustainable agriculture. Scientists of the Max Planck Institute for Chemical Ecology in Jena, Germany, gained new insights...Physicists reveal first 'nanoflowers'
...bility of such nanostructured surfaces to strongly repel water". Dr Paul Danielsen, director of communications at the Institute of Physics, said: "Science can be beautiful. These images show cutting edge nanotechnology research but are strikingly images in their own right. Maybe science and art aren't so d...Models help estimate children's exposure to toxins
...fluorinated hydrocarbons, synthetic chemicals that repel water and oil. No one knows if the compound, used to line microwaveable bags, poses any risk. For now Leckie has no plans to forgo one of his favorite snacks. ''The human animal is pretty tough,'' Leckie said. ''But the problem is that we're pretty i...Progress in probing the mosquito's sense of smell
...avenue of research that may lead to better ways to repel the deadly insect. In a joint effort reported in t...ch for additional chemicals that either attract or repel these highly selective insects. "Looking at attractants is only half of the picture. There is no ev...Chemical gradient steers nerve growth in spinal cord
... of proteins, known as Slits and Semaphorins, that repel them, shifting the axis of growth away from back to front (dorsal-ventral) and toward top to bottom (anterior-posterior). At that point, Wnt proteins take over, drawing the axons up toward the brain. Without the Wnt/Frizzled signaling, the axons wan...Gene clustering helps rice plants fight pathogens
... gives those genes the best chance to successfully repel the pathogen. Clustering apparently allows resista...orm clusters and then recombine forces in order to repel specific harmful advances from pathogens. Dean says finding out more about these resistance genes' ...Summit generates possible solutions to exchange of invasive species in Midwest waterways
...on. An experimental electric barrier designed to repel fish has been operating in the CSSC for roughly a year. While it is helping to slow the advance of invasive species, it does not prevent the exchange of all species and life stages. For example, plankton and species in immature life stages can still ...Invasive species summit aims to halt Great Lakes-Mississippi River species exchange
...ance. An experimental electric barrier designed to repel fish has been operating in the Sanitary & Ship Canal for roughly a year. It does not prevent the exchange of all invasive species and life stages. For example, plankton and species in immature life stages can still cross the barrier. The barrier has ...Catnip stops termites dead in their tracks
...The oil derived from the catnip plant was found to repel and kill termites in a laboratory test. The resear...'t tell anyone to use catnip oil in their house to repel termites," Peterson noted, "and planting catnip around the outside of your house probably isn't goin...Never too late to boogie: Nerve cells still active in 'mature' brain
...as scar tissue seems to emit chemical signals that repel neurons as their axons approach damaged tissue. "We can now watch the underlying molecular machinery at work," said Paul Forscher, an associate professor of molecular, cellular and developmental biology at Yale University. "You can watch the growth c...Meanwhile, back to barnacles...
... to pesticides has been used, but nothing seems to repel completely this lowly, but determined crusty fouler. Now consider the sleek, smooth dolphin, which can spend its entire life in the water and never host a single barnacle, while a ship also designed with a smooth, sleek hull can develop a bad case...Plant chemicals benefit both health and home
...lemson University, is developing natural agents to repel or kill termites without the environmental and health concerns typically associated with termiticides. He has found two promising alternatives in essential oils extracted from clove bud and vetiver grass a tropical plant commonly used to prevent soi...New method of DNA testing promises to transform medical diagnostics
...nds is negatively charged, thereby causing each to repel the other slightly. For the purposes of the testing method the PNA is tailor-made to come together with whatever DNA is being sought. Attached to the PNA is a small florescent molecule. If the DNA has the complementary code of the PNA, the two stra...New insight into how eyes become wired to the brain discovered by Salk, UT Southwestern scientists
...hrin ligands - proteins that cause cells to either repel or attract each other - control how nerve connecti... points when the A-class Ephs and ephrins involved repel the axons from areas where they don't belong. "This work not only helps us to understand how axons n...Sea Grant research shows electric barrier may stop Asian carp
...oncern that the electric field may not effectively repel the fish," said Pegg. Recently, the International Joint Commission has recommended that a second barrier be installed as a backup to ensure that the carp and any other invasive fish species are stopped. And, Chicago Mayor Richard Daley has asked Cong...Mosquitoes repelled by tomato-based substance
... may be used to repel insects. Dr. Michael Roe of NC State with some of the mosquito pests his tomato-derived substance ......ategies or the creation of surfaces that naturally repel pathogenic microbes. Bacteria - and other types of cells - use receptors on their surface to sense their environment and, like a human nose, pick up chemical cues from a distance, said Laura L. Kiessling, a University of Wisconsin-Madison professor o...