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Science News Archive 2009 - Page 197


Page 197 of 277

When every photon counts

Researchers found that nocturnal mammals have an inverted chromatin arrangement in their rod nuclei, which acts as micro-lenses to focus light. This unique organization enhances night vision and provides new insights into the evolution of mammalian retinas.

SourceMax-Planck-Gesellschaft·JournalCell·DateApr 20, 2009

Middle-school math classes are key to closing racial academic achievement gap

A University of Illinois study suggests that challenging middle-school math classes and increased access to advanced courses can close the racial academic achievement gap. The research found that students who take more advanced math courses in middle school have better academic outcomes and are less likely to fall behind.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalAmerican Educational Research Journal·DateApr 20, 2009

Surgical education programs have demand for physician assistants and nurse practitioners

A study in Journal of the American College of Surgeons found that surgical education programs are increasingly hiring physician assistants and nurse practitioners (PEs) to alleviate administrative burdens on residents. PEs were utilized mostly for procedural and administrative duties, with nearly 80% of programs having at least one PE.

SourceWeber Shandwick Worldwide·JournalJournal of the American College of Surgeons·DateApr 20, 2009

Robot improves suture proficiency more rapidly for surgeons inexperienced in laparoscopic techniques

A study published in the Journal of the American College of Surgeons found that robotic-assisted laparoscopic surgery (RALS) allows inexperienced surgeons to learn and perform suturing more efficiently than traditional methods. The study showed RALS resulted in shorter procedural times and improved outcomes compared to freehand laparos...

SourceWeber Shandwick Worldwide·JournalJournal of the American College of Surgeons·DateApr 20, 2009

Study: Lizards bask for more than warmth

Researchers found that chameleons alter their sunbathing behavior in response to their dietary vitamin D intake, regulating UV exposure to maintain optimal levels. The study showed remarkable accuracy in the chameleons' ability to gauge and adjust their UV exposure based on internal vitamin D levels.

SourceUniversity of Chicago Press Journals·JournalPhysiological and Biochemical Zoology·DateApr 20, 2009

Robot-assisted surgery appears useful for removal of some head and neck tumors

Researchers assessed robot-assisted surgery in treating selected head and neck cancers, finding that the procedure offers limited surgical morbidity, reduced hospital stays, and improved lesion visualization. The study involved 36 patients with oral cavity, throat, or larynx tumors, yielding successful robotic resections in 81% of cases.

SourceJAMA Network·JournalArchives of Otolaryngology - Head and Neck Surgery·DateApr 20, 2009

New insight into Rett syndrome severity

A research collaboration has identified a genetic variation that influences Rett syndrome severity, providing potential new target for treatment. Patients with the normal BDNF genetic variant experienced less severe symptoms, including later onset and fewer seizures.

SourceResearch Australia·JournalNeurology·DateApr 20, 2009

International team cracks mammalian gene control code

A recent breakthrough in mammalian genome research has revealed a complex network of genetic regulators that subtly influence gene expression in different cells. The discovery of tiny RNAs and retrotransposons has provided valuable insights into the mechanisms behind cellular development and transformation.

SourceResearch Australia·JournalNature Genetics·DateApr 20, 2009

Integrated regional networks give communities rapid access to life-saving treatment of heart attacks

A new study published in the Journal of the American College of Cardiology: Cardiovascular Interventions found that organized STEMI networks consistently provide the fastest treatment of acute heart attacks, with 86% of patients receiving skilled coronary intervention within 90 minutes. This improvement surpasses the American College o...

SourceAmerican College of Cardiology·JournalJournal of the American College of Cardiology·DateApr 20, 2009

Bridging the gap in nanoantennas

Researchers control light at nanoscale by adopting tuning concepts from radio-frequency technology, enabling targeted design of biosensors and photodetectors. The discovery bridges the gap between optical and radio frequencies, opening doors for compact and integrated nanophotonic devices.

SourceElhuyar Fundazioa·JournalNature Photonics·DateApr 19, 2009

The genetic X-factor

A study of over 200 families with learning disabilities has discovered nine new genes on the X chromosome associated with the condition. The research highlights the challenges of identifying genetic causes and cautions against assuming that a knocked-out gene is causing a disease.

SourceWellcome Trust Sanger Institute·JournalNature Genetics·DateApr 19, 2009

What is the effect of tea polyphenols on hepatic drug metabolizing enzymes?

Research found that tea polyphenols suppress the expression of cytochrome P450 enzymes, which play a key role in metabolizing drugs. This suppression leads to reduced liver damage caused by paracetamol overdose. The study provides new insights into the metabolism of tea polyphenols and their potential as hepatoprotective agents.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateApr 18, 2009

Are TACE treatments really well tolerated without any sensible reduction of liver function?

A prospective cohort study found TACE treatments to be well-tolerated and safe for asymptomatic patients with preserved liver function, with a high HCC progression-free survival probability. The study's results support the efficacy of selective TACE in prolonging life expectancy and confirm its role as a key treatment option.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateApr 18, 2009