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Tag: "imaged" at biology news

Researchers wake up viruses inside tumors to image and then destroy cancers

...e one produced by the herpes simplex virus, can be imaged by an injected radiolabeled chemical (FIAU), which can then be imaged using a gamma camera. "To perform molecular-genetic imaging, we have always had to infect cells ...

McBride shows DNA detective work with paper-eating bacteria that 'glide'

...meter of the cell. These filaments were recently imaged in collaboration with Sriram Subramaniam and Jun Liu at the National Institutes of Health by cryo-electron tomography. "The filaments may be the cell's 'tires,' and there are different kinds," McBride says. "They are designed to help the organism m...

New brain-chemistry differences found in depressed women

...her major difficulties. They also had their brains imaged during a neutral emotional state. Just before the brain scans, the women also had their blood tested to measure levels of two hormones that are released in response to stress. The depressed women were then prescribed an antidepressant drug and re...

Sandia researchers discover way to see how a drug attaches to a cell

...eter-sized particle. The nanoparticles can then be imaged with electron microscopy to reveal the location of the drug receptor molecules on the cell," Shelnutt says. "This type of nanotagging technique might be used in non-biological applications as well - such as finding flaws in semiconductor surfaces." ...

Uniform tungsten trimers stand and deliver

...tanium platform. A scanning tunneling microscope imaged not only the trimers but also their consistent ali...his is the first time researchers have created and imaged monodisperse oxide clusters on another oxide. ...

Researchers find protein that silences genes

...in the nucleus of Arabidopsis cells, and they have imaged it, characterized it biochemically and defined its role in two cellular activities that help bring about gene silencing. According to Pikaard, genes can be turned off when acetyl groups ?little two-carbon entities ?are removed from histone...

Ring-like formations in drying DNA drops could affect hybridization studies

...ence confocal polarizing microscopy, the technique imaged the DNA in the drying droplet in three dimensions. "The DNA alignment parallel to the droplet's edge was counterintuitive," Wong said. "We had expected the DNA to extend along the direction of flow, which was mainly in the radial direction. But, ins...

NYU researchers decorate virus particles, showing potential to enhance MRI capabilities

... the generation of a very intense signal when Wang imaged their samples in a clinical MRI scanner. "Our work validates some hypotheses in the field of Magnetic Resonance Imaging contrast agents," explained Kirshenbaum, the study's corresponding author. "Previous studies have predicted that as you increase ...

Scientists identify molecular structure of key viral protein

...ules of the protein are so small they could not be imaged directly. Instead, the researchers used many of these molecules to create a crystal that could be imaged. Using the method of X-ray diffraction, they bombarded the crystal with X-rays, which bounced off the atoms within the crystal. By collecting a...

Fruit fly's beating heart helps identify human heart disease genes

...implicated in dilated cardiomyopathy in humans, we imaged the adult fly with this novel system and what we saw looked exactly like the same condition in humans," Wolf said. "We obtained clear images that looked similar to an echocardiography study of a human patient with heart failure." According to Rockma...

Terahertz imaging may reduce breast cancer surgeries

...e breast cancer. All samples were first sliced and imaged with terahertz light, and then submitted for histopathologic analysis. Imaging took less than five minutes. "There were substantial differences in the optical properties of normal and diseased tissue," Dr. Wallace said. The size and shape of the dis...

Rare Tibetan antelope listed as endangered

...archers at Duke's Pratt School of Engineering have imaged the beating hearts of dogs. The engineers said their demonstration showed that the probes could give surgeons a better view during human endoscopic surgeries in which operations are performed through tiny "keyhole" incisions. If the probes prove ben...

3D ultrasound device poised to advance minimally invasive surgery

...archers at Duke's Pratt School of Engineering have imaged the beating hearts of dogs. The engineers said their demonstration showed that the probes could give surgeons a better view during human endoscopic surgeries in which operations are performed through tiny "keyhole" incisions. If the probes prove ben...

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

...fluorescent probes within different glomeruli, and imaged their activity using dyes sensitive to the opening and closing of calcium channels on neurons. The scientists created an imaging grid across the glomeruli and measured the ratio of fluorescence versus nonfluorescence over time. Galán then used advan...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...fter the nanoshells were injected, the researchers imaged their presence in the tumor by using a small hand-held optical coherence tomography (OCT) probe similar to that which dermatologists can use to find skin cancers. According to Gobin, the researchers hope that these probes, already commercially availa...

Bacteria which sense the Earth's magnetic field

...structural biologists from Martinsried had already imaged in three dimensions in other cells. This shed light on the crux of the problem with the magnetosome chain: although in the wild type, the magnetosomes lay like pearls on a string along the filament, in the cells missing MamJ, the empty magnetosome ve...

North & South American researchers find architectural abnormalities in T. cruzi ribosome

...d damage the ribosomes. Then, the frozen sample is imaged with an electron beam in the transmission electron microscope. A CAT scan takes readings of a single body from different angles to reconstruct its three-dimensional images, but the microscope catches hundreds of ribosomes at different angles in a si...

'Underground' tunnels discovered as means for communication between immune system cells

...ls - membranes that are so thin they can barely be imaged - and use these veils to move in on and capture their target. In the presence of E. coli, this occurs so rapidly and with such vigor that in accelerated time-lapse video, the cells appear more like a pack of wild animals feeding on a carcass. But tw...

New tool reveals secrets of migrating cells

...ting slices through the tissue that can be sharply imaged and stacked to produce a 3-D image of the cells in real time. The system they use employs an infrared laser emitting short intense pulses of 920 nanometer-wavelength light. In the thymus, it's possible to view cells 400 microns inside the cortex, wh...

A probe, not an echo

...n the other side after it has traveled through the imaged object. The transmitted pulses come from an array... receives the pulses after they travel through the imaged tissue. A sophisticated coding/decoding signal scheme recognizes a small "sweet spot" of the signal...

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