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Tag: "dye" at biology news

Mouse brain cells rapidly recover after Alzheimer's plaques are cleared

..., causes some of the mouse brain cells to producea dye that allowed Brendza to obtain detailed images of nerve cellbranches.To correlate brain cell changes with plaque development, Brendzainjected another dye, developed by scientists at the University ofPittsburgh, that temporarily sticks to amyloid. He ...

Key molecule in plant photo-protection identified

..., causes some of the mouse brain cells to producea dye that allowed Brendza to obtain detailed images of nerve cellbranches.To correlate brain cell changes with plaque development, Brendzainjected another dye, developed by scientists at the University ofPittsburgh, that temporarily sticks to amyloid. He ...

Color-blind method opens new doors in DNA sequencing

... scientists can manipulate the system so that each dye gives the same intensity of fluorescent signal, eliminating the need for further software processing to yield readable sequence information. "Genome sequencing, by its very nature, is a process that begs for precision, and the number of mistakes tha...

Mouse brain tumors mimic those in human genetic disorder

...ure such brain images, physicians inject acontrast dye into a patient's bloodstream and look for accumulation ofdye around the tumor. Though dye accumulation may be a sign of tumorprogression, it is unclear whether that is always the case,partic...

New research questions basic tenet of neuron function

...chers labeled synaptic vesicles with a fluorescent dye and observed how and when the vesicles released neurotransmitters, both when the neurons were at rest and when they were active. From these observations, as well as data gathered from electrophysiological techniques, the researchers found two distinc...

Molecular Motors Cooperate In Moving Cellular Cargo, Study Shows

...r Accuracy. The technique can locate a fluorescent dye to within 1.5 nanometers (one nanometer is a billionth of a meter, or about 10,000 times smaller than the width of a human hair). Recent improvements to FIONA now allow scientists to detect motion with millisecond time resolution. Selvin's team used...

Master gene controls healing of skin in fruit flies and mammals

... embryos turned out to be much more permeable to a dye than normal embryos. The group also showed that the genes active in the mutant flies' lesions were activated in normal flies in cells surrounding a wound created with a sterile needle. The researchers then worked backward, using bioinformatics--comp...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

...n-producing bacteria were infused with fluorescent dye and applied to the microarray. "This experiment revealed that the RNA transcript abundance of the erythromycin-producing genes remained higher for longer times in the Saccharopolyspora erythraea mutant strain," Kao said. Searching for mutations Wh...

Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine

...ns where the bacteria tend to cluster. They used a dye to stain those cells green. When Y. pestis attack... injected in cells. This enzyme can snip the green dye into two pieces. When that happens, those cells, when exposed to fluorescent light, glow blue instea...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

...hods, including releasing and tracking fluorescent dye and with state-of-the-art acoustic current meters. Downward-flowing water in the ocean is always accompanied by horizontal flows, forming a convergence, or "downwelling" zone. When zooplankton swim upward against such a downward current, they form p...

New tool reveals secrets of migrating cells

...ndard technique of labeling cells with fluorescent dye and then hitting them with a laser that makes the dye glow and the cells light up. A certain energy or color of laser light is needed to make the dye, in ...

Microscopic brain imaging in the palm of your hand

...ton" fluorescence imaging, the scientist injects a dye into tissue and then shines a bright light. The ti...ve mice. The mice were injected with a fluorescein dye ?an FDA-approved contrast agent that is most commonly used for retinal exams in humans. The fluoresc...

New technique rapidly detects illness-causing bacteria

...of membrane, while the reporter probe, which has a dye attached to it, sticks to another sequence of the ...on a membrane. Since the reporter probe with a red dye is also attached to the rRNA molecule, as the material collects on a zone on the membrane, it turns ...

Tagging pathogens with synthetic DNA 'barcodes'

...o other ends are attached molecules of fluorescent dye in a predetermined pattern. For example, one probe might contain four molecules of green dye and one of red. Another might have three molecules of green and two of red, and so on. If a mixture ...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

...culture for five days and then using a fluorescent dye to test for the presence of the virus. The main problem with this technique is that the virus is multiplying in the patient at the same time as it is growing in the culture. This has caused many hospitals to switch to a technique called real time PC...

Researchers discover how malaria parasite disperses from red blood cells

...oratory of Cellular and Molecular Biophysics. One dye stained the blood cells green, the other stained the parasites red. In the first stage of the merozoites' release, which the researchers dubbed the "irregular schizont" stage, the red blood cell resembles a lop-sided fried egg, with the parasites vi...

Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace

...s latest study is the first to combine fluorescent dye imaging developed by Galizia, and advanced image processing and mathematical data analysis developed by Galán to actually detect a working memory trace. In the current research, the scientists studied clusters of neurons called glomeruli within the...

Sea slug mixes chemical defense before firing at predators

...scapin in the ink gland, which produces the purple dye in the secretion. "Aplysia packages these innocuous precursors separately and then releases them simultaneously into its mantle cavity at the precise time when they are needed," explained Derby. "This mechanism insures the secretion's potency agains...

Cheap, rapid hand-held check for HIV

...label to blood samples consisting of a fluorescent dye tagged to a further set of antibodies specific for CD4+ cells. They then used an electron microscope to check which cells had been captured. By counting the captured cells, the researchers devised a scale linking electrical resistance with the densit...

T-rays: New imaging technology spotlighted by American Chemical Society

...intramolecular charge transfer using two different dye molecules," he said. "In the future we will use this method to probe photosynthetic and bacterial reaction centers, and perhaps DNA." ...

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