Tag: "samples" at biology news

Genetic mutations linked to the practice of burning coal in homes in China

... cancer in the future." The study analyzed sputum samples from the bronchial tract of 92 individuals who had no evidence of lung cancer and screened them for p53 and K-ras mutations. Damage to both p53, a tumor suppressor gene that prevents normal cells from turning into tumor cells, and K-ras, an oncogene,...

Genetic differences might help distinguish thyroid cancers

... cells from six PTC tumors, nine FTC tumors and 13 samples of normal thyroid tissue. The PTC cells showed over-expression of genes known as CITED1, claudin-10 (CLDN10), and insulin-like growth factor binding protein 6 (IGFBP6). It also showed no change in two genes, caveolin-1 (CAV-1) or caveolin-2 (CA...

Gene clusters predict atherosclerosis severity, susceptibility

...s, the research collected more than 60 fresh aorta samples from humans whose hearts had been harvested for or...s it throughout the body via smaller arteries. The samples ranged from healthy to severely diseased. The researchers then "mapped" not only the degree o...

DNA barcode finds four new bird species

...largest and best-studied vertebrate groups. Taking samples mainly from specimens held at the Royal Ontario Museum in Toronto, Canada, they analyzed COI sequences from 260 bird species that breed in North America. The researchers first measured how much the COI barcode varied within members of the sa...

Researchers devise potent new tools to curb ivory poaching

...racted DNA from elephant droppings and skin biopsy samples collected from numerous locations in 16 African na...orrect. The study indicated that 50 percent of the samples tested were accurately located within 300 miles and 80 percent were accurate to within less than 600...

Indiana University, EPA to study airborne PCBs

... cubic meter of air). Air, water and precipitation samples are collected at five master sites and 10 satellit...will be collecting data from air and precipitation samples at four master stations (near Lakes Superior, Michigan, Erie and Ontario) and two satellite stations...

Tracing genes, biologists show lizard migration is traced to Florida

...biology at Washington University, gathered genetic samples of Anolis sagrei throughout Florida in 2003. Usin...dent Richard Glor, he then analyzed the introduced samples in comparison to the Cuban ones, not only in Florida but also in Hawaii, Taiwan, Jamaica, Grenada an...

No role for simian virus 40 in human pleural mesotheliomas

...A, and SV40 proteins in human pleural mesothelioma samples and found no evidence for a significant role for S...s were not derived from genuine SV40 in the tissue samples but from SV40 DNA fragments engineered into common laboratory plasmid vectors used in molecular biol...

Enzyme maintaining chromosome ends is linked to bone cancer recurrence, decreased survival

...he findings were based on a retrospective study of samples taken from osteosarcoma tumors of children treated...are harder to cure." The St. Jude team used tumor samples from 44 patients to determine the level of telomerase activity that existed at the time the samples ...

DuPont scientist named one of the world's top young innovators by MIT's 'Technology Review' Magazine

...the development of the industry's early commercial samples of polymer-based switches and multiplexers, allowing ever-faster telecommunication. Dr. Petrucci-Samija produced and patented a polymer so transparent to light that it rivaled the performance of the state-of-the-art glass optical devices that are th...

UAF scientists discover new marine habitat in Alaska

...ieve we have at least two rhodolith species in the samples I received," said Riosmena-Rodriguez. "One species...es." Riosmena-Rodriguez said additional samples and further testing are needed to confirm whether the second species is indeed new. Scien...

Yale digital diagnostic technology is basis of new company, HistoRx Inc.

...ine's archive holds more than three million tissue samples collected over the past 70 years. Robert Curtis, president, CEO and co-founder of HistoRx, said, "The company is grounded in the firm belief that the power of AQUA TM , coupled with the extensive clinical data of the Yale tissue archive,...

Prion propagation: Avoiding the toxic oligomer

...aused after binding to the fiber ends. Shaking the samples increased polymerization rate. During polymerization reactions, the authors observed a pronounced pause, followed by an abrupt increase in polymerization rate. Since the length of the pause showed only a weak dependence on the concentration of monom...

Tips from the Journals of the American Society for Microbiology

... In the study, DNA was taken from plaque samples in children ages five to nine, with and without gi...hildren without gingivitis appearing in 65% of the samples as opposed to 45% of the samples from kids with gingivitis. "The results of...

Folic acid vitamin use by women reaches all-time high, March of Dimes survey finds

...om April 19 to May 20, 2004. For results based on samples of this size, one can say with 95 percent confidence that the error attributable to sampling and other random effects could be plus or minus three percentage points. "Use of Vitamins Containing Folic Acid Among Women of Childbearing Age -- Un...

European common frog found to use novel mating strategy

...the field observing this behavior, and took tissue samples to test the paternity of the eggs in numerous clut...ites gathered 16 separate clutches and took tissue samples from the original parents and the pirates. With colleagues at the University of Konstanz, Germany, a...

Peering inside the body, with a new spinliterally

... found he could get detailed spectra in biological samples at record-slow MAS speeds by using pulsed radio waves to separate the obscuring spinning side bands from the main spectrum. With this technique they could look at full bodies or zero in on specific organs or parts of tissues. Wind will continue to re...

Byproduct of water-disinfection process found to be highly toxic

...versity of Illinois at Urbana-Champaign who tested samples on mammalian cells. The discovery raises health-related questions regarding an Environmental Protection Agency plan to encourage all U.S. water-treatment facilities to adopt chlorine alternatives, said Michael J. Plewa [PLEV-uh], a genetic toxicolo...

Genetic analysis rewrites salamander's evolutionary history

...the tree of life," Wake said. Mueller obtained DNA samples from frozen salamander tissue in the collection of UC Berkeley's Museum of Vertebrate Zoology, and over a two-year period worked with JGI researchers to sequence the brief genomes. Once Mueller annotated the genomes, that is, identified the genes, sh...

Researchers identify distinctive signature for metastatic prostate cancer

... to the metastatic process, the researchers tested samples of metastatic prostate cancer from men who had died of the disease. They found a uniformly high level of Hedgehog activity in these tissues, compared to benign prostate tissue samples. The researchers also found high levels of Hedgehog pathway activi...

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