Tag: "dye" at biology news
Cell damage caused by brushing may help keep gums healthy
.... Borke, MCG physiologist, injected a fluorescent dye
into the blood stream that can only get into torn cells. They then brushed the teeth, gums and tongue of rats with a modified electric toothbrush. We saw lots of bright cells, says Dr. Miyake, co-director of the MCG Cell Imaging Core Facility. (W)...
Immune system 'escape hatch' gives cancer cells traction
...idual tumor cells can be tagged with a fluorescent dye
that allows them to glow when they are not bound to T cells, Florida researchers measured the immune response in mice to various foreign proteins, with and without injections of MDSCs. They found an 80 percent suppression of the immune response in t...
American Chemical Society's Weekly PressPac -- June 27/July 3, 2007
... by the co- delivery of platinum and a fluorescent dye
to the cancer cell, which in the future will include tumor-targeting components. ARTICLE #1 FOR IMMEDIATE RELEASE Soluble Single-Walled Carbon Nanotubes as Longboat Delivery Systems for Platinum (V) Anticancer Drug Design DOWNLOAD PDF http://pubs....
New tumor markers -- 'Spot the differences'
...cope and colour-labelled antibodies, we managed to dye
PC cells and to distinguish them from cells of a healthy pancreas or a pancreas with chronic pancreatitis (Fig. B). These results indicate the usefulness of this marker and establish the basis for the development of a differential diagnostic system f...
Swabs not reliable for detecting lead dust in homes
...dirt could interfere with the reaction between the dye
in the swabs and reactive lead in the dust, researchers noted. Yet even when results were interpreted conservatively that is, every swab that did not stay purely yellow was counted as a positive lead result -- the LeadCheck Swabs' probability of c...
A nurse makes the decision on who will live
... inside of a thymic nurse cell in photos, the blue dye
stains the nuclei of thymocytes inside of a nurse cell). Whether or not thymic nurse cells have the capacity to "internalize" another cell into itself, and the function of this unique biological phenomenon during T cell development is the focus of s...
Newborn neurons like to hang with the 'in' crowd
...s infected with virus were marked by a fluorescent dye
enabling the researchers to follow their fate over time as they tried to get accepted into the existing circuitry. With the help of a whole arsenal of high-tech imaging technology and the electron tomography expertise of Mark. H. Ellisman, Ph.D., a...
Researchers find best way to detect airborne pathogens
...ow cytometry, cells are stained with a fluorescent dye
and passed through a beam of laser light. The resulting color, which scientists see as the organisms pass through this light, tells them whether the cells are live (viable) or dead. Just because we can't grow something in medium in the lab doesn't ...
MIT particles pave way for new bedside diagnostics
...onomers (liquid precursors loaded with fluorescent dye
or molecular probe) flow side by side through a microfluidic device, ultraviolet light repeatedly strikes the streams. A chemical reaction initiated by the light causes the liquid to solidify, forming a single particle with two distinct ends. Each pa...
Making daughters different -- how immune cells take divergent paths when fighting infections
...T-cells from the mouses spleen and using a special dye
label, the investigators were able to track the T-cells first divisions upon infection, telling the difference between the original mother T-cell and subsequent daughter cells. In T cells on the verge of division, and which were the first respondi...
The connector rotation hypothesis? Phage do not pack their DNA by rotation
...lso labeled the connector complex with fluorescent dye
molecules so they could observe its motion using single-molecule fluorescence polarization spectroscopy. The researchers then looked at connector movement during DNA packaging in six 29 mutants. After attaching the fluorescent molecules to the conn...
Improved imaging for identifying breast cancer in overweight women
... nodes in three ways: using an intraoperative blue dye
technique, lymphoscintigraphy (pre-operative two-d...t were not identified with the intraoperative blue dye
technique in a significant number of patients. "As the number of integrated hybrid SPECT/CT systems ...
DNA gets new twist: Carnegie Mellon scientists develop unique 'DNA nanotags'
...versity scientists have married bright fluorescent dye
molecules with DNA nanostructure templates to make...tured DNA templates that bind multiple fluorescent dye
molecules between base pairs in the DNA helix (see image). This arrangement keeps dyes far enough aw...
NIH study finds MRI more sensitive than CT in diagnosing most common form of acute stroke
... images of body structures and nerves. A contrast dye
may be used in both imaging techniques to enhance visibility of certain areas or tissues. Study results show immediate non-contrast MRI is about five times more sensitive than and twice as accurate as immediate non-contrast CT for diagnosing ischem...
Together, biological membranes prevail
...of green and red dyes is used where only the green dye
can directly be excited by a laser. The red dye
lights up if some of the energy from the green dye
hops over to the red dye
which becomes increasing...
New miniaturized device for lab-on-a-chip separations
...idated at NIST with separations ranging from small dye
molecules and amino acids to larger biomolecules, such as DNA. A prototype eight-channel GEMBE device built at NIST can produce a complete immunoassay calibration curve for insulin in a single run. NIST is applying for a patent on the method. ...
Two nerve cells in direct contact
...aser ablation (the cell is filled with fluorescent dye
which has a toxic effect when strongly stimulated) and tested sensitivity to rotation in the H2 cell. A long series of these technically very difficult experiments provided unambiguous proof: if the ipsilateral CH cell was destroyed, no effect was se...
Carnegie Mellon study reveals that odor discrimination is linked to the timing at which neurons fire
...ystem. Urban loaded the neurons with a fluorescent dye
that emits a yellow glow. This glow decreases when the dye
binds to calcium. Because the flow of calcium ions into and out of cells corresponds to their firing...
News tips from the Journal of Neuroscience
... how this intrabulbar map develops. They injected dye
into small areas of the olfactory bulb of mice and examined the resulting projections. Whereas in adults, the size of the tracer injection was nearly identical to that of its corresponding projection, in 1-week-old mice, the projections targeted a mu...
Always keeping a safe distance
...ich they had previously administered a fluorescent dye
to glide over a reflective silicon mirror. Depending on their distance from the surface, the molecules lit up to different degrees as a result of the interference effect (Fluorescence Interference Contrast: FLIC). Consequently, the distance is indire...
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