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2009-07-01 16:45:00

A team of Penn State scientists has shed light on the processes that lead to certain human DNA mutations that are implicated in hundreds of inherited diseases such as tuberous sclerosis and neurofibromatosis type 1. The results one day could influence the way couples who seek to have children receive genetic counseling. The team, led by Kateryna Makova, an associate professor of biology, also includes Erika Kvikstad, a graduate student in the Department of Biology, and Francesca Chiaromonte,...

2009-06-15 11:19:28

 Researchers have constructed a light-emitting transistor that has set a new record with a signal-processing modulation speed of 4.3 gigahertz, breaking the previous record of 1.7 gigahertz held by a light-emitting diode.But, the researchers didn't stop there. By internally connecting the base and collector of a light-emitting transistor, they created a new form of light-emitting diode, which modulates at up to 7 gigahertz, breaking the speed record once again.In a pair of papers...

2009-05-21 12:53:31

A new study published online in Nature Immunology ahead of the June 2009 print issue has found that homologous immunoglobulin (lg) alleles pair up in the nucleus at stages that coincide with V(D)J recombination of the heavy and light chain (Igh and Igk) loci. Researchers led by Jane A. Skok Ph.D., assistant professor in the Department of Pathology at NYU School of Medicine and a member of the NYU Cancer Institute, showed that the V(D)J recombinase, which consists of the RAG1 and RAG2...

2009-05-15 09:31:08

Substantial advances for applications of nanocrystals in the fields requiring a continuous output of photons and high quantum efficiency may soon be realized due to discovery of non-blinking semiconductor nanocrystals. This discovery recently announced by scientists at the Naval Research Laboratory (NRL), University of Rochester, Cornell University and Eastman Kodak Company is an important step to the use of the nanocrystals in various practical devices ranging from low-threshold lasers to...

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2009-03-24 07:55:02

Enzymes are important step toward cheaper biofuels Researchers at the California Institute of Technology (Caltech) and world-leading gene-synthesis company DNA2.0 have taken an important step toward the development of a cost-efficient process to extract sugars from cellulose--the world's most abundant organic material and cheapest form of solar-energy storage. Plant sugars are easily converted into a variety of renewable fuels such as ethanol or butanol. In a paper published this week in the...

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2008-11-11 10:00:00

Analysis reveals role of gene swaps in evolution of disease It sounds like a science fiction movie: A killer contagion threatens the Earth, but scientists save the day with a designer drug that forces the virus to mutate itself out of existence. The killer disease? Still a fiction. The drug? It could become a reality thanks to a new study by Rice University bioengineers. The study, which is available online and slated for publication in the journal Physical Review E, offers the most...

2008-09-08 12:00:11

By Courts, Cornelius Montesinos-Rongen, Manuel; Brunn, Anna; Bug, Stefanie; Siemer, Dorte; Hans, Volkmar; Blumcke, Ingmar; Klapper, Wolfram; Schaller, Carlo; Wiestler, Otmar D; Kuppers, Ralf; Siebert, Reiner; Deckert, Martina Abstract Primary lymphomas of the CNS (PCNSLs) show molecular features of the late germinal center exit B-cell phenotype and are impaired in their terminal differentiation as indicated by a lack of immunoglobulin class switching. Because the positive regulatory domain...

2008-08-09 03:00:00

By Anonymous UNIVERSITY OF CALIFORNIA, San Diego electrical engineers have created experimental solar cells spiked with nanowires that could lead to highly efficient thin-film solar cells of the future. Indium phosphide (InP) nanowires can serve as electron superhighways that carry electrons kicked loose by photons of light directly to the device's electron-attracting electrode - and this scenario could boost thinfilm solar cell efficiency, according to research recently published in...

2008-07-23 00:00:46

How and where viral strains of HIV swap DNA may be determined by the immune response against the original infecting strain, U.S. researchers said. Researchers at the partners AIDS Research Center at Massachusetts General Hospital said that when individuals infected with HIV become infected with a second strain of the virus, the two viral strains can exchange genetic information, creating a third, recombinant strain of the virus. These multiple viral strains, called superinfection,...

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2005-02-21 06:56:04

Sharing ninety-nine percent of a chimpanzee's DNA code does not tell the story of its distance from humans, according to a new report in Science Magazine. The code itself is just part of the story. The cut points or hotspots that combine mates to yield the next generation may determine the difference between species. Astrobiology Magazine -- Researchers have learned that despite the 99 percent similarity between the DNA of humans and our closest relative, the chimpanzee, a significant...


Word of the Day
omphalos
  • The navel or umbilicus.
  • In Greek archaeology: A central boss, as on a shield, a bowl, etc.
  • A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.
'Omphalos' comes from the ancient Greek.
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