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Science News Archive February 2009 - Page 21


Page 21 of 24

Plan offers guidance for evaluating menopause-like condition in girls and young women

Primary ovarian insufficiency is a menopause-like condition affecting girls and young women, characterized by loss of menstrual periods, infertility, and hot flashes. A comprehensive plan provides recommendations for diagnosis and treatment, including hormone replacement therapy and counseling.

Babies & Robots: Infant power mobility on display

Researchers at the University of Delaware have developed miniature power chairs that infants can control, enabling children with cerebral palsy and spina bifida to explore their surroundings. This breakthrough technology has the potential to significantly impact brain development and learning abilities in these children.

More children need medical help for RSV than previously known

A study published in New England Journal of Medicine found that most children with RSV infections between 1 and 5 years old were previously healthy and had no other risk factors. The study estimates that about 1 in 334 hospitalizations, 1 in 38 emergency department visits, and 1 in 13 primary care office visits occur due to RSV infection.

SourceUniversity of Rochester Medical Center·JournalNew England Journal of Medicine·DateFeb 4, 2009

Nanoemulsion potent against superbugs that kill cystic fibrosis patients

Researchers have developed a nanoemulsion that effectively kills a wide range of bacteria resistant to antibiotics, including those causing cystic fibrosis. The treatment uses ultra-fine oil-and-water emulsions that disrupt bacterial outer membranes, making resistance unlikely and offering a potential alternative to antibiotics.

SourceMichigan Medicine - University of Michigan·JournalAntimicrobial Agents and Chemotherapy·DateFeb 4, 2009

Study finds Zen meditation alleviates pain

A University of Montreal study found that Zen meditators have lower pain sensitivity both in and out of a meditative state compared to non-meditators. Meditators experienced an 18 percent reduction in pain intensity, suggesting that meditation can change the way someone feels pain.

SourceUniversity of Montreal·JournalPsychosomatic Medicine·DateFeb 3, 2009

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