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Tag: "particle" at biology news

Tiny particles could solve billion-dollar problem

...y smaller, a higher percentage of the atoms in the particle are found on the surface of the particle instead of being locked away inside the metal where they cannot interact with other chemicals. For e...

Breakthrough method in nanoparticle synthesis paves the way for new pharmaceutical and biomedical applications

...t are tailored simultaneously with nanometer-scale particle size and nanometer-sized pores. This is a beautiful example of ‘bottom-up?nanotechnology made possible by supramolecular chemistry,?said Prof. Ying. Previous attempts at synthesizing such nanoparticles created particles that were limited in the type...

UCLA launches $20 million stem cell institute to investigate HIV, cancer and neurological disorders

...d in cell isolation, microarrays and shape encoded particle approaches for gene expression analysis, proteomics using advanced mass spectroscopy, large-scale computational facilities for bioinformatics, and world-class multi modality imaging facilities for analysis of stem cell therapies in laboratory models ...

Shutting down the HIV assembly line

...stigators have now identified an early step in HIV particle assembly. The findings, published March 11 in Cell...s present in the late endosome and have focused on particle assembly at that point, none have tackled how the Gag protein gets there in the first place. The cur...

Basis for DNA ejection from single phage particles

...e release of pressure accumulated within the viral particle itself. Almost all phages (also known as bacteriophages) are formed of a capsid structure, or head, in which the viral genome is packaged during morphogenesis, and a tail structure that ensures the attachment of the phage to the host bacteria. A com...

UCSD medical/bioengineering reseachers show titanium debris satobtage artificial joints

...r wear resistance and fatigue properties to reduce particle generation from implants. In addition to Sung, additional authors were first author Moon G. Choi, M.D., UCSD Department of Orthopedic Surgery; and Hae S. Koh, M.D., UCSD Department of Orthopedic Surgery; Daniel Kluess, M.S. and Daniel O'Connor, M.A....

Nature provides inspiration for important new adhesive

...e products such as plywood, oriented strand board, particle board, and laminated veneer lumber products - all major components of home construction and many other uses. One of these patented adhesives is currently cost-competitive with a commonly used urea-formaldehyde resin, researchers say, but does not us...

When it comes to cell entry, being average has its advantages

...t in ?those in medication, say ?knowing an optimal particle size for entry is also helpful. "With nanotubes, ...ocytosis. Here's how it happens: A virus or other particle arrives at the cell membrane. Protein receptors on the membrane act like hooks, grabbing onto hooks,...

Breakthrough: Scientists create world's tiniest organic particles

...il now, DeSimone said, most current techniques for particle formation were incompatible with organic materials. That was because they involved baking, etching or processing robust metals and such with solvents that would have destroyed far more fragile organic matter such as genes or drugs. The new method av...

Secrets to antibody's success against West Nile Virus surprise scientists

...the viral envelope. The envelope of a single viral particle or virion is comprised of 180 copies of this protein. For the new study, scientists determined the detailed structure of a single antibody bound to its envelope protein target region using the technique of protein crystallography. Scientists were ...

Hide and seek: Researchers discover a new way for infectious bacteria to enter cells

...teria ?which is 20 times the size of the largest particle scientists believed a cell could take in by endocytosis ?could invade non-phagocytic cells. Other labs had made similar observations with other bacteria. Cossart and Veiga investigated the underlying machinery behind this uncommon invasion strategy, ...

Gene discovery sheds light on causes of rare disease, cancer

...teria ?which is 20 times the size of the largest particle scientists believed a cell could take in by endocytosis ?could invade non-phagocytic cells. Other labs had made similar observations with other bacteria. Cossart and Veiga investigated the underlying machinery behind this uncommon invasion strategy, ...

Baby's genes affect mom's cholesterol levels

...terest to the medical community. "The lipoprotein particle is composed of proteins called apolipoproteins and lipids such as cholesterol and triglycerides." explains Descamps. "Lipoproteins represent the only way for lipids, which are insoluble in water, to be transported through the blood circulation, compo...

Method slashes quantum dot costs by 80 percent

...aris, the team now has a method for predicting the particle size and growth behavior of quantum dots based on only three physical properties of a given solvent: viscosity, surface free energy and solubility of bulk cadmium selenide powder. ...

The right drug at the right time

...aris, the team now has a method for predicting the particle size and growth behavior of quantum dots based on only three physical properties of a given solvent: viscosity, surface free energy and solubility of bulk cadmium selenide powder. ...

'Nanospheres' that block pain of sensitive teeth

...rsity of Leeds have found that the most successful particle shape for filling these channels is a 'nanosphere'...es to a good depth. They'd be the perfect shape of particle for filling these channels and reducing or preventing the pain caused by sensitive teeth". The next...

NJIT study shows nanoparticles could damage plant life

...at is the mechanism of the interaction between the particle and the root? That we don't know as yet," he said. Nanoparticles can be deposited into air by exhaust systems, chimneys or smoke stacks, said Watts. The particles can also mix with rainwater and snow and gradually work their way into soil. It is d...

Geoscientists follow arsenic from chicken feed to streambeds

... soil column," said Schreiber. "This suggests that particle transport is an important mechanism in arsenic cycling in these watersheds." Graduate student Mary Harvey is currently studying the adsorption potential for organic arsenic to iron oxides and clay minerals. Although much of the organic arsenic is b...

New class of antibiotics effective against drug-resistant bacteria discovered in fungi

... soil column," said Schreiber. "This suggests that particle transport is an important mechanism in arsenic cycling in these watersheds." Graduate student Mary Harvey is currently studying the adsorption potential for organic arsenic to iron oxides and clay minerals. Although much of the organic arsenic is b...

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

...lternating LHRH and lytic peptide on the ironoxide particle was effective at killing cancer cells, suggesting that the cell-killing peptide worked best when it came in direct contact with the cell membrane. "It is possible that if the lytic peptide has no interaction with the membrane it is targeting, it cann...

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