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Tag: "microscope" at biology news

Walking molecule now carries packages

...C14H8O2. The UCR study used a scanning tunneling microscope in Bartels's laboratory that gives a precise pictu...ividual anthraquinone molecule appears in Bartels' microscope as an almost rectangular feature with slightly rounded edges. ...

Stretching DNA to the limit

...ual DNA molecules with the tip of a scanning probe microscope and stretch it while measuring the forces generated. These "stretch—release" measurements enable the accurate determination of changes in the elasticity of the DNA strands. Upon exposure to UV light, the force profile of the viral DNA changes dramati...

Scientists unlock secret of what makes plants flower

... detected in living tissues using highly sensitive microscope systems. The team then grafted two plants together, only one of which contained the gene for the fluorescent version of FT. This allowed them to show conclusively that FT protein moved from where it was produced in the leaves of one plant, across...

Cartilage discovery offers arthritis hope

...sity of Manchester has used sophisticated electron microscope techniques to uncover the molecular structure of the thinner of the two types of collagen fibrils. Professor Karl Kadler, who led the research in the Faculty of Life Sciences, said: "The ability of cartilage to withstand cycles of compression and r...

Imaging techniques permit scientists to follow a day -- or four -- in the life of a cell

...ide, and another for maintaining the cells under a microscope for long-term observation. The first protocol, av...so scientists can track the glowing protein with a microscope and observe what it's doing and where it's going inside the cell. This microinjection technique is s...

Smithsonian scientists discover new marine species in eastern Pacific

... eggs themselves. "All the tedious dissections and microscope preparations done on a rolling, vibrating ship have really paid off," Norenburg said. One of the unique features of the islands off the coast of Panama is that they host animals that normally are found in the Indo-Pacific, half a world away. "To t...

Noise echoes in cell communications

...ints to the constant movement of particles under a microscope to illustrate this phenomena. Unlike a physics experiment that can produce the same result after various attempts, in biology, one particular experiment can yield a multitude of outcomes. This randomness, however, isn't problematic, but a necessar...

Lighting up life: Cold Spring Harbor Protocols presents tips for creating glowing plants

...proteins for maximal GFP detection, and setting up microscope equipment for imaging in plants. This information will be useful to a broad range of scientists interested in plant biology and imaging technologies. A second freely accessible article ( http://www.cshprotocols.org/cgi/content/full/2007/3/pdb.pr...

Brain maps online

...earchers started with sections of brain mounted on microscope slides. Those slides were scanned to create image files or "virtual slides," and assembled like tiles into composite images. The maps have a resolution of better than half a micrometer per pixel, or 55,000 dots per inch, with virtual slides approachi...

Fast and slow -- How the spinal cord controls the speed of movement

...looded in as the nerve cells activated. A confocal microscope with lasers allowed the researchers to image the cells at very high resolutions. Using this set up, they watched nerve cells light up as the animals moved at different speeds. While no one knows how this pattern relates to other vertebrates, the r...

New technique will produce a better chromosome map

...preparing polytene cells for viewing under a light microscope involve using a thumb, pencil, forceps or other instrument to maneuver and press the cells between a glass coverslip and slide. Only about 10 percent of the slides processed this way provide useable images and even those rarely offer crisp structural...

Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

...nsulting specialists and using a scanning electron microscope to examine the jaws and other hard parts of the nu... California Academy of Sciences and to Valdes. The microscope work also was supported by the NSF through a grant to Valdes and collaborators. A list of the new ...

Crammed with charged DNA, pressure rises inside virus

...ather decadent meal. But it is a 3-D cryoelectron microscope reconstruction of the cross-section of a virus, before and after cramming itself full of its own DNA. The virus, phi29, has a tiny motor that pumps its DNA into the capsid—outer shell—during the assembly process. The potential energy of the tightly...

Cellular message movement captured on video

...lin with dyes that stain cells rigidly attached to microscope slides. Those snapshots of fixed cells can’t reveal paxillin movement. “We can now see the dynamics of how paxillin and other proteins move inside the cell with new fluorescent labels and live-cell video microscopy,” said Chien, director of the Wh...

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