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Tag: "added" at biology news

Epstein-Barr virus might kick-start multiple sclerosis

...small segments of the EBNA1 protein--that the team added to T cells from MS patients and healthy controls. As expected, the T cells in the healthy volunteers activated only in the presence of a specific group of peptides. But, Edwards said, "EBNA1-specific T cells from the MS patients not only increased ...

New angiogenesis finding may help fight cancer growth

...n extension of the blood-vessel network. When Paul added NK-B to endothelial cells, "They lost the capacity to organize in three dimensions, to form the tubes that are the precursors to new blood vessels," Bresnick says. "Then we got excited." Further tests showed that NK-B could inhibit angiogenesis in...

Study defines effective microbicide design for HIV/AIDS prevention

...lent in terms of their ability to inactivate HIV," added Anthony Geonnotti, the study's lead investigator, who is a Ph.D. candidate in Katz's laboratory. "Improvements to future generations of microbicides will largely depend on the delivery system and applicators." However, he added, advances made through...

Gene therapy prevents the onset of diabetic symptoms in mice

... composition for the past 50 years. The scientists added nutrients in a test plot to replicate soil conditions that existed prior to the loss of sugar maples over the past 25 years. Nitric and sulphuric acid in acid rain leaches calcium from the soil. Calcium is the second most abundant plant nutrient (a...

Acid rain causing decline in sugar maples, say researchers

... composition for the past 50 years. The scientists added nutrients in a test plot to replicate soil conditions that existed prior to the loss of sugar maples over the past 25 years. Nitric and sulphuric acid in acid rain leaches calcium from the soil. Calcium is the second most abundant plant nutrient (a...

The appearance of your hands can reveal your age, study finds

...veins were removed or jewelry and nail polish were added ?to unaltered photographs to assess which hands looked younger. The majority of participants felt that the altered photos of women's hands appeared younger. However, alterations to photos of very elderly hands ?characterized by thin skin, age spots...

Newborn screening can cause unnecessary parental stress

...use irreversible damage, but as more disorders are added to the screening ?many states now test for 30 or more ?false-positive results are on the rise. In the June issue of Pediatrics, researchers from Children's Hospital Boston report that false-positive results cause considerable parental stress, even wh...

Patients to benefit from novel technology revolutionizing high-speed molecular imaging

...on computerized tomography (SPECT) and CT images," added the co-author of "D-SPECT: A New Solid State Camera for High-Speed Molecular Imaging." "Patient health considerations and radiation safety standards limit the radiation dose that can be administered for the purpose of diagnostic imaging," said Pat...

Nanotubes used for first time to send signals to nerve cells

Texas scientists have added one more trick to the amazing repertoire of carbon nanotubes -- the ability to carry electrical signals to nerve cells. Nanotubes, tiny hollow carbon filaments about one ten-thousandth the diameter of a human hair, are already famed as one of the mo...

Large-scale genomics project will hunt genes behind common childhood diseases

... provide great statistical power to our research," added Dr. Hakonarson. "We will be able to characterize genotypes and health conditions over a sizable population of children. This project will help to set the standard for identifying biological links to childhood diseases." ...

Discovery could aid fight against cystic fibrosis infection

... fight the infection in cystic fibrosis patients," added Andzrej Joachimiak, director of Argonne's Structural Biology Center and of the Midwest Center for Structural Genomics based at Argonne. ...

Corals switch skeleton material as seawater changes

...rtificial seawaters in 10-gallon glass tanks, then added fragments of the three species of Caribbean reef-building corals. These were replete with colonies of polyps, which had spent the previous month in "equilibration tanks." Ries adjusted the chemistry of those tanks over 30 days, until their magnesium-...

Lack of key enzyme associated with development of rare tumor

...alafil and "weakly" inhibited by sildenafil. They added that there are no reports in the medical literature of malfunctioning adrenal glands or increased adrenal cell growth in users of these drugs. "However, detailed clinical studies addressing this potential complication are currently lacking," they wr...

Speeding the search for elusive chromosomal errors

...any of these small rearrangements in chromosomes," added Dr. Shaikh. "Now we have a better tool for finding the abnormal gene or genes that give rise to a disorder." The research is published in the May 2006 issue of Human Mutation. For many of these rare disorders caused by small errors in chromosomes, i...

Precision biochemistry tracks DNA damage in fish

...ash., and in 2001 a section of the lower river was added to the Environmental Protection Agency's Superfund list because of contaminants including polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), mercury and other metals, and phthalates. In previous research on Duwamish fish, PNRI...

Scientists take 'snapshots' of enzyme action

...r FMOs, the end result -- that an oxygen atom gets added to make these compounds soluble -- is simple," Swaminathan says, "but the reactions require additional participants, or cofactors." In order to understand the molecular mechanism, the scientists used high-intensity x-ray beams at the National Synchro...

Scientists solve sour taste proteins

...wed red when the concentration was low. When they added sour-tasting acids to the cells, the ion channels went from closed to open, enabling calcium ions to flow in, increasing their concentration within the cell and changing the cells from red to green, Matsunami said. The channels remained closed when c...

Dissecting the machinery of nicotine's reward

...vior, which was also restored when the researchers added the subunit back. This finding thus showed that the dopaminergic brain circuitry was involved in such behaviors as curiosity or interest in novelty, wrote the researchers. The researchers concluded that their "data suggest that a concomitant activat...

Invasive species alter habitat to their benefit

...ansplanted live hybrid cattails; in the second she added litter---the mats of dead stems that accumulate around hybrids. A third plot received both live hybrids and litter, and the fourth was left alone. Litter accumulation was the deciding factor, she found. "Plots with the litter treatment had higher ...

Gene screen for breast cancer better than pathologist's 'eye'

... of five to ten cancer genes. The percentages are added together for a cumulative score, which is compared to a threshold value. Levels above the threshold indicate the potential presence of cancer cells and below threshold suggests that the samples are normal. In the study, Hopkins researchers compare...

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