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Science News Archive 2009 - Page 256


Page 256 of 277

Even natural perfumes may cause allergies

Natural aromatic oils can trigger allergic reactions, according to a study by Lina Hagvall at the University of Gothenburg. The research found that common perfume substances, like geraniol and lavender oil, can become allergens through autoxidation and skin enzyme reactions.

SourceUniversity of Gothenburg·JournalContact Dermatitis·DateFeb 3, 2009

Journal of American College of Surgeons study finds warm-up helps surgeons improve performance

A new study published in the Journal of the American College of Surgeons found that a warm-up of 15-20 minutes with simple surgical exercises improves proficiency and alertness in surgeons. The research shows that warm-up exercises can benefit even fatigued surgeons, leading to better performance during operations.

SourceWeber Shandwick Worldwide·JournalJournal of the American College of Surgeons·DateFeb 3, 2009

Growth hormone treatment after weight loss surgery prevents loss of muscle mass

A new study published in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism found that growth hormone treatment after weight loss surgery reduces lean body mass and skeletal muscle mass losses. Researchers discovered that short-term growth hormone treatment during a standardized diet and exercise program increased l...

SourceThe Endocrine Society·JournalThe Journal of Clinical Endocrinology & Metabolism·DateFeb 3, 2009

Why don't more animals change their sex?

A Yale University study found that the biological costs of changing sexes are rarely sufficient to disfavor sex change, suggesting a possible explanation for its rarity among animals. Researchers built theoretical models and tested them using game theory, showing that only huge costs can disfavor sex change.

Minnesota Partnership targets aphids

Researchers at the Mayo Clinic have developed an insecticide that targets the soybean aphid, a pest ravaging Minnesota crops. The small molecule blocks acetylcholinesterase activity in aphids without inhibiting it in humans.

SourceMayo Clinic·JournalPLOS ONE·DateFeb 3, 2009

Advancement in tissue engineering promotes oral wound healing

A research team developed an autologous full-thickness oral substitute that mimics the characteristics of gingiva, providing a promising solution for oral cavity reconstruction. The study's results support the need for larger clinical trials to further evaluate the effectiveness of this new tissue-engineered product.

Potential new herpes therapy studied

Researchers have made a breakthrough in developing a new gene-targeting therapy that uses an RNA enzyme to inhibit strains of the herpes simplex virus. The technique has shown promise in experiments with mice and rabbits, but further research is needed before it can be attempted in people infected with herpes.

SourceUniversity of Florida·JournalJournal of Virology·DateFeb 3, 2009

Caltech researchers help unlock the secrets of gene regulatory networks

Researchers at Caltech have discovered intricate gene regulatory networks in various organisms, including fruit flies, nematodes, sea urchins, lampreys, and mice. These networks play a crucial role in directing developmental processes, with subtle balances of regulatory signals being essential for proper cell differentiation.

SourceCalifornia Institute of Technology·JournalProceedings of the National Academy of Sciences·DateFeb 3, 2009

Long-term recovery of reefs from bleaching requires local action to increase resilience

Scientists assess a quarter-century of climate change effects on coral health and find both good and bad news. Reefs in the Indian Ocean are recovering relatively well from bleaching events, while western Atlantic reefs have generally failed to recover due to chronic stressors like diseases and overfishing.

Researchers find pathway and enzyme unique to tularemia organism

Researchers at UTSA have made a breakthrough discovery in the fight against tularemia, a deadly bio-warfare agent. They identified a unique metabolic pathway and enzyme, nicotinamide adenine dinucleotide synthetase (NMS), that is specific to Francisella tularensis, making it a potential target for therapeutic development.

SourceUniversity of Texas at San Antonio·JournalProceedings of the National Academy of Sciences·DateFeb 3, 2009

Early humans had 'jaws of steel'

Researchers used computer simulation to study the jaw structure of Australopithecus africanus, finding it ideal for cracking hard objects. The findings suggest that early humans adapted their diet to changing food sources by using their powerful jaws.

SourceArizona State University·JournalProceedings of the National Academy of Sciences·DateFeb 3, 2009

Living longer thanks to the 'longevity gene'

A study by Kiel University confirms a special sequence variation of the FOXO3A gene is more frequent in centenarians globally, supporting its role in longevity. The research team analyzed DNA samples from 388 German centenarians and 731 younger individuals, finding consistent results worldwide.

SourceKiel University·JournalProceedings of the National Academy of Sciences·DateFeb 3, 2009

Violent computer games have role in fire safety

Researchers at Durham University found that commercial violent computer games can be used to build virtual worlds for training in fire evacuation procedures. The study showed that using game code from First Person Shooter games is quicker and more efficient than traditional virtual reality toolkits.

SourceDurham University·JournalFire Safety Journal·DateFeb 3, 2009

New clues to pancreatic cells' destruction in diabetes

A recent study found that CXCL10 is a key factor behind the destruction of insulin-producing β cells in diabetes. The inflammatory marker was found to decrease β cell viability and impair insulin production in isolated human pancreatic cells. This discovery may lead to new treatments for preventing β cell death or restoring lost function.

SourceCell Press·JournalCell Metabolism·DateFeb 3, 2009

Neural mapping paints a haphazard picture of odor receptors

Researchers at Harvard University have mapped the neural circuitry of the nose, revealing a seemingly random patchwork of receptors for different scents. Despite striking differences between smells like coffee and peppermint, cells processing similar odors are found in precisely the same location on the olfactory bulb.

SourceHarvard University·JournalNature Neuroscience·DateFeb 3, 2009

Australian technology in global health toolkit

CSIRO's Snorocket software enhances electronic health record accuracy, enabling faster data processing and improved collaboration among healthcare professionals worldwide. The innovation is part of the IHTSDO Workbench, a platform for standardizing clinical terminology and promoting global health data consistency.

Effects of brain exercise depend on opponent

A recent study found that playing games against a virtual opponent activates different brain areas than those activated when playing against a human opponent. The medial prefrontal cortex and other regions associated with 'Theory of Mind' were more active in male players believing they were competing with another human.

SourceBMC (BioMed Central)·JournalBMC Neuroscience·DateFeb 3, 2009