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Science News for September 30, 2010


Genetic alteration linked with human male infertility

Researchers discovered a genetic alteration in the NR5A1 gene that disrupts sperm production, accounting for approximately 4% of cases of unexplained male infertility. The study suggests that these mutations may indicate mild abnormalities in testicular development, highlighting the need for further clinical investigation.

SourceCell Press·JournalAmerican Journal of Human Genetics·DateSep 30, 2010

Slicing proteins with Occam's Razor

Researchers have developed a new way to peer into the inner workings of proteins and detect specific atoms at work. By analyzing myoglobin's structure and motion, they identified the critical amino acid controlling oxygen binding, with implications for custom-crafted proteins and biotechnologies.

SourceUniversity of Vermont·JournalPhysical Review Letters·DateSep 30, 2010

NIH scientists describe how salmonella bacteria spread in humans

Researchers discovered a reservoir of rapidly replicating Salmonella inside epithelial cells, which are then pushed out into the gut cavity, triggering an inflammatory response. This understanding may lead to a treatment that prevents the spread of infection and sheds light on the mechanisms behind acute intestinal inflammation.

SourceNIH/National Institute of Allergy and Infectious Diseases·JournalProceedings of the National Academy of Sciences·DateSep 30, 2010

Bedouin tribe reveals secrets to McGill's GA-JOE

Researchers from McGill University have discovered that mutations in the SCARF2 gene are responsible for Van Den Ende-Gupta syndrome, an extremely rare genetic disorder characterized by unique head and facial features. The study utilized a high-tech genome analyzing machine to quickly sequence coding portions of the human genome and id...

SourceMcGill University·JournalAmerican Journal of Human Genetics·DateSep 30, 2010

Plants that move: How a New Zealand species disperses seeds in a high alpine, wet environment

Researchers found that 10 out of 17 Veronica species in New Zealand's alpine environment exhibit hygrochasy, a type of seed dispersal mechanism that combines plant movement with moisture response. The study challenges the traditional view of plant movement and highlights the diversity of plant adaptations to environmental conditions.

SourceBotanical Society of America·JournalAmerican Journal of Botany·DateSep 30, 2010

Researchers at the University of Granada associate trigger points with shoulder injury

A study published in Experimental Brain Research reveals that chronic impingement syndrome, a common cause of shoulder pain, is triggered by excessive activation of specific neck and shoulder muscles during daily life or sports. The research opens the door to future tests of physiotherapy as a non-invasive treatment for shoulder injury.

SourceUniversity of Granada·JournalExperimental Brain Research·DateSep 30, 2010

Scarless brain surgery is new option for patients

Transorbital neuroendoscopic surgery (TONES) is a safe and effective treatment for advanced brain diseases and traumatic injuries. By performing surgery through the eye socket, surgeons can gain equivalent access to the front of the brain while eliminating large ear-to-ear scars associated with major brain surgery.

SourceUniversity of Washington·JournalNeurosurgery·DateSep 30, 2010

HPV screen-and treat-intervention effective in cervical cancer prevention

A randomized trial found that HPV DNA-based screening and cryotherapy significantly reduced high-grade cervical cancer precursors in unscreened South African women. The study suggests that a 'screen-and-treat' approach can be an effective cervical cancer prevention strategy, especially in low-resource settings.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateSep 30, 2010

No sponge left behind

A UNC study found that radio frequency tags on surgical sponges can aid in preventing sponges from being left behind in patients following surgery. The researchers used a radio-frequency detection device in 1,600 operations and detected one sponge in an operation where manual counting was correct.

OU team receives $580K DOE EPSCoR grant

Researchers at OU aim to create more efficient solar 'photovoltaic' cells that can convert heat to electricity with conversion efficiencies of 30% or higher. The project involves collaboration between OU and Sandia National Laboratories to push photovoltaic technology to longer wavelengths.

TGen-Mayo Clinic study discovers role of DNA methylation in multiple myeloma blood cancer

A study by Mayo Clinic and TGen reveals that DNA methylation is altered with increasing severity in multiple myeloma, leading to the overexpression of oncogenes. The researchers found hypomethylation at specific points of DNA, associated with myeloma development, and suggest it may have prognostic value.

SourceThe Translational Genomics Research Institute·JournalCancer Prevention Research·DateSep 30, 2010

How warm was this summer?

The summer of 2023 was the fourth-warmest on record, with June to August temperatures globally being warmer than previous years but not unprecedentedly so. Global warming has increased the frequency of extreme warm anomalies, making events like the Moscow heat wave more likely.

Catalyst sandwich

Scientists create a synthetic structure that mimics the behavior of PCR enzymes, allowing for highly sensitive detection of small molecules. The new catalysts could lead to advancements in medical diagnostics, forensics, and environmental monitoring.

SourceNorthwestern University·JournalScience·DateSep 30, 2010

Earlier chemotherapy treatment shows no survival benefit or better quality of life for women with relapsed ovarian cancer

A new randomised trial shows that starting chemotherapy earlier does not improve survival or quality of life for women with relapsed ovarian cancer. The study found that patients who received early treatment experienced a faster deterioration in quality of life, including role, emotional, social, and fatigue symptoms.

SourceThe Lancet_DELETED·JournalThe Lancet·DateSep 30, 2010

Hydrogen fuel for thought

Researchers at Rice University have discovered a class of material known as metallacarborane that could store hydrogen at or better than benchmarks set by the US Department of Energy. The material has the potential to meet DOE storage goals for hydrogen fuel, which could be used in cars, fuel cells, and industry.

SourceRice University·JournalJournal of the American Chemical Society·DateSep 30, 2010

Turning waste heat into power

Physicists at the University of Arizona have developed a new way to convert waste heat into electrical power using quantum physics. The technology holds great promise for making various devices more efficient and reducing ozone-depleting chemicals.

SourceUniversity of Arizona·JournalACS Nano·DateSep 30, 2010

K-State research finds that educators should encourage college students to shoot for the stars

Research by K-State assistant professor Chardie Baird and Florida State University professor John Reynolds suggests that discouraging students from pursuing their educational aspirations can lead to depression. The study found that adaptive resilience allows individuals to adapt to failed expectations, leading to healthier lives.

SourceKansas State University·JournalAmerican Sociological Review·DateSep 30, 2010

Virginia Tech professor discovers new TB pathogen

Kathleen Alexander has discovered a novel tuberculosis species, M. mungi, in banded mongooses, which behaves differently from other TB infections, killing infected animals within two to three months. The pathogen's source and host range are areas of ongoing research.

SourceVirginia Tech·JournalEmerging Infectious Diseases·DateSep 30, 2010