Researchers find color sensitive atomic switch in bacteria
...ositions, suggesting to us that light of different colors drives this protein back and forth between two differently colored states of the protein," said co-senior author John L. Spudich, Ph.D., director of the Center for Membrane Biology in the UT Medical School Department of Biochemistry and Molecular Bio...Researchers create nanotubes that change colors, form 'nanocarpet' and kill bacteria
..., with a hydrocarbon diacetylene, which can change colors when appropriately formulated, the resulting molecule would have the desired properties of both biosensor and biocide. Remarkably, in addition to being able to kill cells, the resulting reaction mixture had the ability to self assemble into beautiful...Newly designed nanoparticle quantum dots simultaneously target and image prostate tumors in mice
...ntum dots will eventually allow us to use multiple colors and intensities to monitor multiple parameters at the same time for precise diagnosis and targeted treatment," Dr. Gao said. "We are developing quantum dots in the near-infrared spectrum, which should improve our ability for non-invasive and more se...Story tips from the Department of Energy's Oak Ridge National Laboratory, July 2004
...miconducting polymers that emit light of different colors for hours instead of minutes could have a bright future in the world of cryptography. What makes this possible is a technique developed by Mike Barnes of the lab's Chemical Sciences Division that produces uniformly oriented single polymer molecules i...'Noisy' genes can have big impact
...ny noise crept in, it would produce a variation in colors among the cells. This color variation could then be measured to determine the amount of noise that was present. This method eliminated any influence of external environmental factors or variables such as differences in cell type, since the two genes ...UCLA chemists develop new coating for nanoscale probes
...eloping methods to attach quantum dots of specific colors to the different proteins on cells' surface and inside cells. "Humans have close to 40,000 genes," Weiss said. "A large group of these genes operates at every moment, in every single cell of our body, in very complicated ways. By painting a s...... on the cell surface. The QDs glow in a variety of colors and are up to 1000 times brighter than conventiona...er in diameter that fluoresce in several different colors upon excitation with a laser source. These crystals enabled the researchers to deliver real-time vid...... are active in one tissue or cell, the fluorescent colors overlap to form other colors. When genes labeled r...where the targeted genes are working. But only two colors at a time can be seen using this method, and thus only the activity of two genes. Furthermore, it is......d proteins are labeled so that they glow different colors and can be seen with a microscope. The scientists then captured time-lapse images as the inducible gene was switched on: First, the gene's tightly coiled DNA adopted a more relaxed, open shape. Next, RNA could be seen accumulating and being spliced i...Nanoparticle probes are destined for major new role in medical diagnostics and drug delivery
..., including the ability to emit light in different colors and to act as fluorescent tags. This makes them highly suitable as contrast agents for magnetic resonance imaging (MRI), positron emission tomography (PET) or as fluorescent tracers in optical microscopy. They also may be useful as structural scaff...Mantis shrimp fluoresce to enhance signaling in the dim ocean depths
...at 30 to 40 meters, you see all different kinds of colors - greens and oranges and yellows. It's probably ju...es the blue light but lets through the fluorescing colors - red, green and yellow. "The pigments are taking in the blue light that is present at that depth an...Major mutations, not many small changes, might lead way to new species
...ngbirds, and has red or deep yellow-orange petals, colors bees can't see. These and other differences make the species of monkeyflowers distinct and nearly eliminates crossbreeding in the wild. In an experiment funded by the National Science Foundation, the researchers changed the region of a chromosome, ...Protein is shown to aid cell's reading of genetic code
...l II and FACT molecules and fluoresce in different colors under ultraviolet light. With an optical microscope, the researchers could then see the location of Pol II and FACT on the DNA strand. By introducing the cross-linking at various times, they created a step-by-step record of the process. As predicted...Genes that paint fly derrieres hint at convergence
... describes the genetic mechanisms that control the colors and patterns on fruit fly abdomens. The study suggests that the simple modulation of a transcription factor, a protein that can bind to DNA and influence its activity, may be responsible for governing the diversity of body color patterns among relate...Research: Coral reefs' decline actually began centuries ago
... coral organism to die and "bleach," its mosaic of colors turning a uniform skeletal white. The goal: reconstruct the ecological history of the reefs from before the first people appeared to fish them some 40,000 years ago to the present era. The scientists pored over historical and archaeological records...Common nutrients fed to pregnant mice altered their offspring's coat color
...self remained unchanged. Just how the babies' coat colors changed without their Agouti gene being altered is the most exciting part of their research, said Jirtle. The mechanism that enabled this permanent color change called "DNA methylation" -- could potentially affect dozens of other genes that make hum...Hydrothermal vent systems could have persisted millions of years, incubated life
... same material as limestone in caves, and range in colors from white to cream to gray. The field, named Lost City in part because it sits on a seafloor mountain named the Atlantis Massif, was discovered Dec. 4, 2000, when scientists weren't even looking for hydrothermal vents. "The discovery of the Lost C...Researchers zero in on new drug combination strategy
...dividual components, much in the same way that two colors can be combined to form a third, distinct color (take yellow and blue, for instance, which combine to make green). Scientists attribute this to the combined effect of both drugs on the complex signaling networks that coordinate activity within and b...Researchers use lab cultures to create robotic 'semi-living artist'
... many colored markers to use at one time and which colors it will use. Central to the experiments is Potter's belief that over time the teams will be able to establish a cultured in vitro network system that learns like the living brains in people and animals do. To achieve that, the information from the r......ea, with redheads having the least, and other hair colors in the middle, Tobin says. --Does hair grow faster during the day than in the night? "There is evidence," Philpott says, "that hair growth follows a circadian [24-hour] rhythm. We have in fact found some of the circadian clock genes are expressed i...