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Tag: "samples" at biology news

Any exposure to tobacco smoke during pregnancy is risky

...PRT gene located on the X chromosome in cord blood samples from newborns. Dr. Grant's analysis pooled the studies' data, looking for frequency of induced mutation as well as the resulting molecular spectrum of mutations. In particular, the new analysis redefines the "non-smokers" used as controls to consider...

Researchers grow stem cells from human skin

...m cell normally found in bone marrow. Using tissue samples from 15 donors who had routine circumcisions, the scientists were able to isolate single stem cells, which they then grew in culture dishes in the laboratory. The scientists used hormones and growth factors to coax the stem cells into becoming fat, m...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...d colleagues at UC Berkeley supplied the bacterial samples and characterized genome information while Hettich and Nathan VerBerkmoes, a post-doctoral student in ORNL's Chemical Sciences Division, performed the mass spectrometry work. Manesh Shah of ORNL's Life Sciences Division was responsible for the inform...

Enlisting genomics to understand flu evolution

...sive information on the entire genome [and] enough samples from around the world," he adds, to find the benign virus strain that will become next season's scourge. The more genomes scientists collect--and the more refined the tools of genomics become--the greater the chances of developing more effective vacc...

Newly discovered genetic disease sheds light on body's water balance

.... Next Gitelman, Rosenthal and Feldman took blood samples from each baby boy and his mother to search for the cause of the unique disorder. They learned that Raymond Fenwick, a scientist with Quest Diagnostics Nichols Institute, was developing an assay that could be used to sequence the AVPR2 gene that code...

Researchers develop new method for facile identification of proteins in bacterial cells

... to the researchers, is a "shortcut" for preparing samples that makes PMF faster and more economical. By redu...nto predictable, small pieces called peptides. The samples are then analyzed using matrix-assisted laser desorption ionization-time of flight mass spectrometry...

Fluorescing lab worms signal longer life spans

..., scientists could conceivably analyze human fluid samples for a variety of biomarkers similar to HSP-16 in order to determine a person's life span, said Rea. "They might even be able to tweak each stress-response system and set them for maximum longevity, which is believed to be about 120 years." ...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...d ethical problems associated with obtaining human samples of primordial germ cells (PGCs), which are the anc...ut at present it is very difficult to obtain human samples of these cells as they only occur early in development." Mr Aflatoonian, who is a PhD student in Pr...

Fragment of yellow fever virus may hold key to safer vaccine

...aboratory in Conakry to collect and evaluate blood samples from patients. In people, the mosquito-borne viru...lipps-Universitat in Marburg, Germany. Using blood samples from two yellow fever patients who had recovered, and sophisticated molecular techniques, the resear...

Most common lung cancers may begin in newly discovered cells

...-ras mutations to the profile of human lung cancer samples make the researchers optimistic about the relevance of targeting BASCs for early tumor detection and chemoprevention in the earliest stage of disease in people. Discovery of the lung stem cells could lead to new therapies for other lung diseases, su...

A novel virus for croup

...espiratory infections. Nine hundred and forty nine samples of nasopharyngeal secretions were collected from b...egions of Germany. The study found that forty-nine samples (5.2%) were positive for the virus HCoV-NL63 overall, with a greater incidence in outpatients (7.9%)...

Oxygen increase caused mammals to triumph, researchers say

...3, a byproduct of photosynthesis, in deep-sea core samples that go back 205 million years. Because photosynth...13 behind, the presence of carbon 13 in the fossil samples allows scientists to estimate precisely how much oxygen was in the atmosphere at any given time, Fal...

Study casts doubt on 'Snowball Earth' theory

... debate has tended to revolve around the same rock samples and analytical techniques, Olcott said. So she and her team focused on a drill core of little-known black shale deposits from southeastern Brazil and applied lipid biomarker techniques to identify prehistoric organisms based on the fatty remains of t...

Investigating 'brain shrinkage' in alcoholics

...ain to study, and the molecular biologist can take samples from these regions and look at the genes controlling structure and function and even identify individual proteins that might play a role in cognitive deficits as well as recovery and repair of the brain. Together we can develop strategies for public ...

Virologist finds contagious equine flu in dogs

...rsity of Florida researchers sent fluid and tissue samples from greyhound race dogs that had died from a respiratory illness at a Florida racetrack in January 2004. "Of all animals, dogs have the most intimate contact with humans on a daily basis, so the potential for human infection has to be in the back ...

Expanding forests darken the outlook for butterflies, study shows

... Roland and doctoral student Nusha Keyghobadi used samples of butterfly dispersal and genetic variability taken from the Kananaskis region in Alberta to show a correlation between less genetic diversity and smaller meadows. According to Roland, the altitude of the tree line in the Canadian Rockies is rising...

Penguin chicks exposed to human visitors experience spike in stress hormone

...ul event, such as being captured. Additional blood samples were drawn after 30 and 60 minutes. The same procedures were followed when the chicks were 40 to 50 days old and again two weeks before fledging, which occurs when the chick is about 75 days old. None of the chicks demonstrated an elevated baseline ...

Logging changed ecological balance for monkeys, damaged health

...d on three primate species, collecting 1,076 fecal samples from the heavily logged area and from an undisturb...t of a longitudinal study of logging's impact. The samples came from red-tailed guenon, red colobus (Piliocolobus tephrosceles) and black-and-white colobus (Co...

Affymetrix and ParAllele Launch Industry's Most Comprehensive Product Line for Targeted Genotyping

...d on three primate species, collecting 1,076 fecal samples from the heavily logged area and from an undisturb...t of a longitudinal study of logging's impact. The samples came from red-tailed guenon, red colobus (Piliocolobus tephrosceles) and black-and-white colobus (Co...

President Bush's cut to AIDS prevention in Africa would be devastating

...d on three primate species, collecting 1,076 fecal samples from the heavily logged area and from an undisturb...t of a longitudinal study of logging's impact. The samples came from red-tailed guenon, red colobus (Piliocolobus tephrosceles) and black-and-white colobus (Co...

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