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Science News Archive 2005 - Page 46


Page 46 of 165

Room-temperature transistor laser is step closer to commercialization

Researchers at University of Illinois have successfully demonstrated room-temperature operation of a light-emitting transistor laser, paving the way for high-speed applications. The breakthrough could lead to faster signal processing, large capacity seamless communications, and improved electrical and optical integrated circuits.

Study identifies gene in mice that may control risk-taking behavior in humans

A study at Fred Hutchinson Cancer Center identified the neuroD2 gene as a potential controller of risk-taking behavior and emotional memory in humans. Mice with one copy of the gene showed impaired ability to form emotional memories and conditioned fear, similar to humans who have varying levels of risk-taking tendencies.

SourceFred Hutchinson Cancer Center·JournalProceedings of the National Academy of Sciences·DateSep 26, 2005

A slight difference and significant similarities

A study compared genetically modified Desirée potatoes with five conventional varieties, revealing a surprising range of variation in substance content. The analyses found that the genetically modified lines exhibited similar variation to the conventional varieties, except for higher inulin polysaccharide content.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateSep 26, 2005

Family history alone can imply cancer mutation risk

A study found that a thorough family history is an effective measure for cancer risk, with 20% of women with breast or ovarian cancer having a high risk of BRCA1/BRCA2 mutations. Women of Ashkenazi ancestry were more likely to have high-risk family histories than those of non-Ashkenazi ancestry.

SourceWiley·JournalCancer·DateSep 26, 2005

A novel method to measure circadian cycles

Scientists have developed a novel method to measure circadian cycles in human cells, finding large differences between individuals' rhythms. The study used skin samples infected with a fluorescent virus to track circadian gene expression, confirming the human circadian cycle length of 24.5 hours.

SourcePLOS·JournalPLOS Biology·DateSep 26, 2005

Statins use associated with lower risk of fractures

A significant association was observed between statin use and reduced fracture risk in a large cohort of mostly male veterans. The study, published in the Journal of the American Medical Association (JAMA), found that statins reduced fracture risk by 36% compared to no lipid-lowering therapy.

SourceJAMA Network·JournalArchives of Internal Medicine·DateSep 26, 2005

Mayo Clinic boosts immune system

Researchers at Mayo Clinic discovered that antiretroviral therapy (ART) can dramatically increase the production of disease-fighting T cells in non-HIV-infected individuals, including older adults. This finding has significant implications for developing new cancer vaccines and improving immune protection in vulnerable populations.

SourceMayo Clinic·JournalAIDS·DateSep 23, 2005

Jefferson scientists design method to fight artificial implant infections with antibiotics

Researchers at Jefferson Medical College have developed a bonding method to create a permanent chemical bond between antibiotics and titanium, allowing it to kill bacteria and prevent infection. This technique has the potential to combat implant-related infections by creating an antibiotic surface that prevents infection from starting.

SourceThomas Jefferson University·JournalChemistry & Biology·DateSep 23, 2005

Mechanism regulating tooth shape formulation found

A recent study by researchers at the University of Helsinki has identified a key gene called ectodin that regulates tooth shape formation. The team found that mice lacking functional ectodin have abnormal teeth with broader cusps and extra teeth, highlighting the importance of ectodin in maintaining tooth development.

SourceUniversity of Helsinki·JournalScience·DateSep 23, 2005

Troubling trends converge

Researchers report a disturbing convergence of drug-resistant bacteria and virulent new strains of Staph. aureus, leading to severe illness and death in previously healthy children. The study highlights the need for better treatments and a vaccine to combat this growing threat.

SourceUniversity of Chicago Medical Center·JournalNew England Journal of Medicine·DateSep 22, 2005

JCI table of contents October 1, 2005

Scientists discovered that interleukin-6 increases in TM patients' cerebrospinal fluid and is linked to tissue injury. Arsenic trioxide inhibits nuclear receptor function via SEK1/JNK-mediated RXR phosphorylation. Epithelial myosin light chain kinase-dependent barrier dysfunction mediates T cell activation-induced diarrhea.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 22, 2005

Researcher finds new use for botox

Dr Frederic Meunier's research explores how powerful nerve toxins like Botox selectively dissect basic nerve cell processes, leading to a novel angle in understanding neuronal diseases like Parkinson's and Alzheimer's. He has also discovered that Botox-intoxicated nerve cells can recover by emitting little sprouts.

SourceResearch Australia·JournalMolecular Biology of the Cell·DateSep 22, 2005

A cytokine not kind to an injury of the spine

Researchers at Johns Hopkins found elevated IL-6 levels correlate with tissue injury and clinical disability in Transverse Myelitis (TM) patients. Elevated IL-6 levels are necessary and sufficient to mediate neural injury, dependent on nitric oxide.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateSep 22, 2005

Deep sea buffet for bone-devouring worms

Researchers discovered a unique partnership between Osedax worms and their symbiotic bacteria, allowing them to turn over large amounts of organic carbon at an accelerated rate. This process can potentially aid understanding of adaptation between animals and microbes.

SourceBlackwell Publishing Ltd.·JournalEnvironmental Microbiology·DateSep 22, 2005