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Tag: "attached" at biology news

Nicotine rush hinges on sugar in neurons

...ested a simple mechanical role for sugar molecules attached to the surface of the receptor. “They serve as the link between the neurotransmitter binding site and the membrane region where the gate is located,” Chen said. “The sugar is kind of like a hinge. It’s pulling the door open and closed.” Cutting...

Cellular message movement captured on video

...lizing paxillin 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, dire...

Math that powers spam filters used to understand how brain learns to move our muscles

...ciple; they predict which key words are “probably” attached to mail you don’t want and “learning” as they go to fine tune what they exclude from your in-box. The computer model, Shadmehr says, almost precisely duplicates the results of experiments that tested the ability of monkeys to visually track rapid...

Progress toward an antitumor vaccine

...spacer, which has an allyl group (two carbon atoms attached by a double bond) at its end. The glycopeptide is ... the protein segment,” explains Kunz, “can thus be attached to the carrier protein in a controlled fashion. The largely nonimmunogenic thioether bridges could c...

Bacteria ferry nanoparticles into cells for early diagnosis, treatment

...'s Birck Nanotechnology Center. The researchers attached nanoparticles to the outside of bacteria and linke...to 200 nanometers - or billionths of a meter - are attached to the bacteria with "linker molecules." "The use of commercially available polystyrene nanoparti...

Surprising origin of cell's internal highways

..."I've seen that there are lots of microtubules not attached to the centrosome," said Kaverina, assistant professor of Cell and Developmental Biology and senior author on the paper. "So I am trying to look at their origins." The Golgi has been suspected to function as an MTOC, explained Kaverina. However, ...

Modified mushrooms may yield human drugs

...e." To create transgenic mushrooms, researchers attached a gene that confers resistance to hygromycin, an antibiotic, to circular pieces of bacterial DNA called plasmids, which have the ability to multiply within a bacterium known as Agrobacterium. The hygromycin resistance gene is a marker gene to h...

Vaccine prevents prion disease in mice

...ld stimulate the mice's immune system, researchers attached prion proteins to a genetically modified strain of Salmonella. For the study, the mice were orally vaccinated with a safe, attenuated Salmonella strain, which expressed the prion protein. Then they were divided into two groups ?those who had high...

Diminishing dinosaur steps saved by laser and laptop

... camera and GPS, and feeds the information into an attached laptop. Software is then used to create a detailed and very accurate 3D computer model of the location. This technology has allowed researchers to closely examine and analyse the Spanish quarry tracks from many different angles and even inside out...

Percutaneous aortic valve replacement safe, successful in high-risk patients

...panding stent-like frame with the new tissue valve attached to its core. As it expands, the CoreValve covers the diseased natural valve leaflets. During the procedure, the patients were placed on a bypass pump for an average of 30?0 minutes to minimize blood flow through the aorta and ease placement of th...

Magnetic computer sensors may help study biomolecules

... biomolecules such as proteins or DNA strands were attached to the magnetic particles, the spin-valve array could apply torsional forces strong enough to alter the structure or shape of the biomolecules. The NIST group is now working on a microfluidic chip that will accomplish this electronically, which would...

From the deep -- Researchers find new species of sea anemone

... high-tech equipment like underwater video cameras attached to remotely operated vehicles (ROVs). Deep sea ROVs are also equipped with robotic arms and suction devices that are used to collect species. "It's like a submarine that's manned from the surface," said Daly, who plans to head to Monterey Canyon l...

Heart failure: Intervention possibilities from imaging programmed cell loss

...new cases are diagnosed each year. Researchers attached a radioactive substance to annexin A5, a protein that binds to dying cells, said Hofstra. They then used nuclear imaging that produces three-dimensional computer-reconstructed images to reveal information about both structure and function to measure ...

Tracking sperm whales and jumbo squid

...the scientists carefully approached the animal and attached an electronic depth recorder to its back. Later, whenever the tagged whale surfaced for a breath of air, the device would transmit recorded data about the animal’s movements to an orbiting satellite. Jumbo squid also were abundant, with numerous s...

Discovery could lead to better control of hemorrhagic fever viruses

...e protein and the cellular protein to which it had attached itself. Then, using a technique called mass spectrometry, they analyzed this attached cellular protein to determine its identity. The receptor, identified in Choe's lab by Jonathan A...

Robotic exoskeleton replaces muscle work

...ilitation aids. In the U-M device, electrodes were attached to the wearer's leg and those electrical signals received from the brain were translated into movement by the exoskeleton. "The (artificial) muscles are pneumatic. When the computer gets the electrical signal from the (wearer's) muscle, it increa...

New sucker-footed bat discovered in Madagascar

...t that has large flat adhesive organs, or suckers, attached to its thumbs and hind feet. This is a remarkable find because the new bat belongs to a Family of bats endemic to Madagascar--and one that was previously considered to include only one rare species. The new species, Myzopoda schliemanni, occurs onl...

New study sheds light on 'dark states' in DNA

...A base is excited, and whether a sugar molecule is attached to the base or not. Next, Kohler's lab is investigating whether the dark state can be linked to DNA damage. "What are the photochemical consequences of long-lived states? Are they precursors to some of the chemical photoproducts that we know caus...

Turning green gunk to gold, anti-cancer gold

...cial for the drug's anti-cancer activity---becomes attached to the molecule. The epoxide group can be attached in two configurations, designated as alpha and beta. Scientists have known for several years that th...

Destructive enzyme shows a benevolent side

...at under stress conditions, the same enzyme ?while attached to the mRNA ?helps form temporary shelters within the cell called stress granules. There, the mRNA can be protected so that production of the protein can quickly resume whenever the stress ends, perhaps insuring that the cell survives. Stress gran...

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