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Tag: "free" at biology news

Report lists top 20 most-vulnerable African carnivores

...h said. The very tip of the chromosome must remain free to allow access to the site on the enzyme that directly extends the telomeres, Cech pointed out, so the anchor site secures the DNA molecule nearby, slightly closer to its center. Cech is optimistic that the new portrait of the TEN domain will spee...

Free-radical busting antioxidants might not promote healthy hearts

...ity to prevent the oxidation of bad cholesterol by free radicals—a process thought to contribute to the bu... nothing to do with its ability to scavenge oxygen free radicals, as the free radical-busting part of the drug alone was ineffective in protecting animals a...

Stable polymer nanotubes may have a biotech future

...s-linked" membrane. The nanotubes are then snipped free from the parent cell with an "optical scalpel" (highly focused ultraviolet laser pulse). The nanotubes maintain their shape even after several weeks of storage, and can be removed from the liquid solution and placed on a dry surface or in a different...

New organic substrate

...C, the resulting cellulose being practically pure, free of phytotoxic products and ready to be used in the growing of agricultural crops. ...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...loped a precisely defined stem cell culture system free of animal cells and used it to derived two new hum...ished human embryonic stem cells in animal-product free media, but those efforts included the use of poorly defined or proprietary products, and no one has ...

How nice, brown rice: Study shows rice bran lowers blood pressure in rats

...rofile, kidney function and the harmful effects of free radicals. For example, high levels of a marker ca...ical stress and genetic damage due to oxygen-based free radicals. The researchers found that rice bran, which contains various forms of the antioxidant Vita...

Marrow-derived stem cells deliver new cytokine to kill brain tumor cells, offer protection

...ue, there is an unlimited supply of cells that are free of ethical and tissue-rejection issues. This study provides the first documentation that the marrow-derived stem cells possess the same tumor-tracking capability of other neural stem cells. It also includes the first report on the use of the cytoki...

Genetically altered mice no longer like cocaine

...On the last day of the experiment, mice were again free to roam the box, and no injections were given. The animals were videotaped while they were in the box. "The normal mice spent more time in the compartment where they had received the cocaine injections," Gu said. "These animals were seeking more coc...

Researchers find molecular 'brake' to cell death

...this extra energy was produced from the "pools" of free nucleotides that exist in the cell cytoplasm. Nucl...ective because they are sequestered by an ocean of free nucleotides and ATP," he says. "No one had ever realized this kind of barrier existed to impede apop...

Chocolate, wine, spicy foods may be OK for heartburn, Stanford study finds

...of those sufferers, Gerson's recent findings could free them from the bonds of dietary self-denial. She is considering doing studies of her own to learn more about what effects dietary changes actually have - or don't have - on heartburn. "It probably wouldn't be that hard to recruit volunteers for a stu...

What's shaped like a pear and has 2 genomes? Check the pond

...e, an impressively packaged bunch of coding genes, free of so-called junk DNA (noncoding sequences and oth...he project also underwrote the creation of a major free community resource: The Tetrahymena Genome Database (TGD; http://ciliate.org/ ), headed by Mike Che...

Key stress protein linked to toxicities responsible for Parkinson's, Alzheimer's

...mechanistic link between cellular stress caused by free radicals and accumulation of misfolded proteins th...eimer's and Parkinson's Disease, overproduction of free radicals, specifically nitric oxide (NO), causes inhibition of PDI by a reaction called S-nitrosylat...

Finding a better way to make biodiesel

...at are much cheaper than soy oil, but also contain free fatty acids that can't be converted to biodiesel b.... Acidic catalysts on the particle can convert the free fatty acids to biodiesel while basic catalysts can convert the oils into fuel. And the particles th...

Scientists aim to thwart use of flu as bioweapon

...t Airport Hotel on West Ridge Road. The lecture is free and open to the public. During the symposium Thursday and Friday, University of Rochester experts in mathematics, statistics, immunology, and infectious diseases will join with colleagues from around the nation to discuss exactly how flu invades the...

Rice scientists unveil 'nanoegg'

...he nanoscale. "All metal particles have a sea of free electrons flowing continuously over their surface called plasmons," Nordlander said. "These plasmons slosh around constantly, just like waves in the ocean. Light also travels in waves, and when the wavelength of incoming light matches the wavelength ...

Global study shows all tobacco bad for the heart

...o. "We have been a successful advocate for a smoke free Ontario and have achieved one of the strongest pieces of anti-tobacco legislation in North America. This study provides more evidence why it's critical for everyone to become and remain smoke free, and will encourage governments to take effective act...

Scientists discover a genetic code for organizing DNA within the nucleus

...tters" that make up a genetic sequence), while the free area between neighboring nucleosomes is only about 20 bases long. It is in these nucleosome-free regions that processes such as transcription can be initiated. For many years, scientists have been unable to agree whether the placement of nucleosom...

Case Western Reserve University researchers find protein associated with brain cell death

...s a cascade of reactions that produces unregulated free radical production that eventually leads to the ne...nce elimination of the protein resulted in reduced free radical production. Wilkinson said by understanding this biological component in the disease proce...

Scientists discover why cornea is transparent and free of blood vessels, allowing vision

...rn why the cornea, the clear window of the eye, is free of blood vessels--a unique phenomenon that makes vision possible. The key, say the researchers, is the unexpected presence of large amounts of the protein VEGFR-3 (vascular endothelial growth factor receptor-3) on the top epithelial layer of normal h...

Encoded metallic nanowires reveal bioweapons

...nized" and bound by its antibodies. At this point, free antibodies that have been tagged with a fluorescent dye are added to the sample. These also dock onto the pathogen so that it is surrounded like the filling in a sandwich; giving the technique its name, "sandwich immunoassay". Measurement of the fluo...

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