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Tag: "fluorescent" at biology news

'Virus chip' detects new virus in prostate tumors

...oscope. The dots that have found a match glow with fluorescent light. ...

Source of crucial immune cell in the skin discovered

... cells into Langerhans cells. The researchers put fluorescent beads in mice in a group of immune cells known as monocytes. They then followed the cells to observe their fate. They found that a specific type of monocyte know as Gr-1 homes to inflamed skin, proliferates, and then differentiates to form Langerhans...

Scientists directly view immune cells interacting to avert autoimmunity

...e this has been accomplished. The scientists used fluorescent dye to mark different types of cells so they could directly observe the interactions of the key cell types involved in initiating autoimmune attacks and the control of their actions by therapeutic regulatory T cells. The "nonobese diabetic" (nob) mo...

New nanosensor uses quantum dots to detect DNA

...rgy on to a nearby molecule, which in turn emits a fluorescent glow that is visible under a microscope. But quan...he second probe. The Cy5 released this energy as a fluorescent glow. If the target DNA had not been present in the solution, the four components would not have joi...

Cheap, rapid hand-held check for HIV

...eam added a 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 de...

New, unique microscope for nanotech

...such as cells, and picks up structures tagged with fluorescent dyes. Instead of cutting a sample into thin slices...ulk," Liu said. For example, biologists could use fluorescent tags to look at structures inside a cell and link them to very small changes on the cell membrane. M...

Sleeping sickness parasite shows how cells divide their insides

...NAi, and visualizing the process was possible with fluorescent protein tags. How this process relates to higher organisms is the focus of present research. ...

New U. of Colorado at Boulder flu chip may help combat future epidemics, pandemics

...nother complimentary sequence that also contains a fluorescent dye, and such "hits" light up like a pinball machi...ocess. "We are now looking at ways to amplify the fluorescent signal after we capture the RNA on the microarray, which could shorten the identification time to ju...

The brain is broadly wired for reproduction

...eam and downstream to connected neurons, and green fluorescent protein (GFP), to mark the producing cells. By visualizing the locations of BL, GFP, and GnRH neurons and their axons, the researchers were able to identify neurons directly connected to GnRH neurons. They also determined which neurons sent signals t...

Olfactory system detects pheromones that control reproduction

...permitting the researchers to label neurons with a fluorescent protein marker. This technique relied on a conditional approach that caused the pseudorabies virus to replicate only when it was triggered by a specific genetic signal. The researchers also created a transgenic mouse in which neurons expressing LHRH ...

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

...ored. This latest study is the first to combine fluorescent dye imaging developed by Galizia, and advanced ima... olfactory bulb. Team member Marcel Weidert placed fluorescent probes within different glomeruli, and imaged their activity using dyes sensitive to the opening and...

Sperm stem cells closer to being like embryonic stem cells

... that specifically labeled germ cells with a green fluorescent protein, making the germ cells easier to identify ...rcent pure germ cells, which we achieved using the fluorescent marker and other purification methods that are different from those used by other research groups." ...

New GM mosquito sexing technique is step towards malaria control, report scientists

...on have altered male mosquitoes to express a green fluorescent protein in their gonads. Coupled with a high speed...d the mosquito larvae to express an enhanced green fluorescent protein (EGFP). The modified larvae were mixed with normal larvae, and the researchers were able to ...

Bacteria which sense the Earth's magnetic field

...tists genetically marked the MamJ protein with the fluorescent reporter protein GFP ("green fluorescent protein") and could thus track the fusion protein in the living bacteria cells. As they suspected, t...

A new window into structural plasticity in the adult visual cortex

...in four- to six-week-old mice. These mice express fluorescent protein in neocortical neurons, allowing Lee et al. to track the location and morphology of these neurons using two-photon microscopy. Time-lapse images of six pyramidal neurons and eight nonpyramidal neurons in 13 mice were taken over the course of ...

Customized gene chip provides rapid detection of genetic changes in children's cancer

...plementary sequences on the microarray, they cause fluorescent tags to shine under laser light. This is a signal that a particular gene variation is present in the sample. "We can test DNA from peripheral blood and from the tumor, and we should see a loss of signal in the cancer," said Dr. Fortina. He noted tha...

UT Southwestern researchers develop screening test for cells that activate immune system

...system. "We basically engineered DCs to express a fluorescent signal only when sensing activation signals so that you can identify immuno-stimulatory agents very easily," said Dr. Takashima. Immuno-stimulatory agents launch the immune system. The research appears on Blood magazine's online Web site and will ap...

Scientists closer to new cancer detection method

...cell cultures and observing whether they unleash a fluorescent burst after they adhere to cancer proteins. The ...nts after treatment." It works by capitalizing on fluorescent molecules engineered into tiny strands of DNA or RNA. Known as aptamers, the strands act as molecula...

Modifications render carbon nanotubes nontoxic

... In particular, scientists are keen to exploit the fluorescent properties of carbon nanotubes for medical diagnostics. Nanotubes are long, hollow molecules of pure carbon with walls just one atom thick. They are related to buckyballs, tiny spheres of pure carbon that are about the same diameter. In previous st...

The right drug at the right time

...tant advance toward the large-scale manufacture of fluorescent quantum dots, scientists at Rice University have developed a new method of replacing the pricey solvents used in quantum dot synthesis with cheaper oils that are commonplace at industrial chemical plants. Rice's study, which was conducted under the ...

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