A large Canadian study found no significant difference in postoperative mortality between high- and low-volume hospitals for complex surgical procedures. The authors suggest that volume-based regionalization may have good reasons, but the main benefit of reduced mortality rates may be overstated.
Researchers Jeff Bary and David Weintraub propose that planetary disks may not dissipate as expected, but instead become invisible due to the planet-building process. They detected evidence of molecular hydrogen in three classical T Tauri stars with visible disks, suggesting a large but hard-to-detect disk in naked stars.
Immerge BioTherapeutics has identified the PERV receptor, a key factor in understanding the safety of xenotransplantation. This breakthrough allows for the development of safer porcine organs for human transplantation, addressing an unmet need in clinical transplantation.
Scientists discovered a tiny dwarf galaxy in intergalactic space that was previously overlooked. The galaxy is believed to have formed elements through supernova explosions, enriching the gas cloud. This finding suggests that tiny galaxies may have played a significant role in the chemical evolution of the universe.
Research shows that omega-3 fish oils stored in heart cells can prevent sudden cardiac death and fatal arrhythmias. Studies found a 29% reduction in deaths among men who ate fish at least twice a week, attributed to fewer fatal arrhythmias.
A study found that race has a powerful effect on children's perceptions of occupation status, with African American children rating jobs performed by whites as higher in status. This impact was observed even among children from lower socio-economic backgrounds.
Researchers found that smallpox vaccine-induced antibody immunity can last a person's entire life, while T-cell immunity declines slowly over time. The study also showed that repeated vaccinations have little impact on immunity levels.
Researchers used data on recent SARS cases to project how the epidemic will proceed under various circumstances. They found that careful interventions, such as reducing contacts and improving treatment, can control the spread of the virus.
A study of 487 cocaine-dependent patients found that treatment combining group drug counseling with individual therapy reduced HIV risk. The combination treatment showed the best improvements in reducing cocaine use, resulting in a 40% decrease in HIV risk.
The Chamorro people's consumption of cycad-fed flying foxes may have led to high incidence of ALS-PDC, a neurodegenerative disease. Studies show that eating wild animals with unknown health risks can be particularly hazardous.
Researchers estimate between 2 and 100 million global species, developing six methods to assess biodiversity in a single habitat. Three methods proved effective even with limited data, while spacing ecoregions evenly throughout the continent yielded the best results.
A recent study found that monogamous mammals are more likely to die out due to factors such as population isolation and smaller harems, which can lead to lower male populations and reduced ability to detect approaching hunters. Conservation efforts may need to be targeted towards these species to save them from extinction.
A recent study found that non-destructive fishing methods on the Banggai cardinalfish population reduced group size by half. This threat is alarming, given the species has been commercially fished for only six years and its range expands widely. To mitigate this, researchers encourage local people to raise Banggai cardinalfish in aquar...
Smoking prevalence varies significantly among immigrant groups and countries of origin. Native-born respondents had higher smoking rates than foreign-born respondents. Including findings on country of origin can enhance the development of culturally sensitive smoking cessation programs.
The Clemson Inflatable Fabric Airlock, developed in collaboration with NASA, boasts a two-layer fabric design that eliminates seams for added strength. The airlock has withstood a terrestrial tensile force of over 675,000 pounds at four atmospheres of internal pressure.
Bacteriophage, or phage, previously thought not to be infectious to humans, may be a new target for fighting certain bacteria that produce toxins. Scientists found that phage can transfer toxins and genes between bacteria, transforming harmless microbes into virulent bugs.
A study of 53 African-American adults with a history of cocaine use found that 45% had elevated serum CRP levels, associated with subclinical coronary atherosclerosis and cardiac abnormalities. Elevated CRP may indicate future cardiovascular events.
A recent study establishes that rapid infant weight gain is associated with obesity in young adulthood, particularly among African Americans. The study found that subjects with rapid early infancy weight gain were more than twice as likely to be obese at age 20 compared to those without rapid weight gain.
The Field Museum has received a grant to preserve and conserve its extensive collection of Chinese textiles, featuring 1,200 embroidered folk textiles and 1,000 historical costumes. The museum's unique holdings provide valuable insights into traditional Chinese textile decoration techniques and symbolism.
A study published in Nature found that behavioral treatment can reverse brain changes caused by cocaine use and prevent relapse. Rats given extinction training during withdrawal showed a significant increase in glutamate receptors, which may help ease cravings and prevent relapse.
A study tracked 148 HIV-infected individuals aged 25-69 to determine factors influencing adherence to antiretroviral medication. Patients over 50 were more likely to adhere to their regimen, with 53% meeting the standard compared to 26% of younger patients.
Emory University researchers have successfully self-assembled Alzheimer's amyloid fibrils into well-defined nanotubes. These nanotubes exhibit unique properties and can be used to build nanotechnological devices, offering new avenues for research and potential applications in fields such as medicine and materials science.
Farm-raised male salmon outcompete wild males in spawning events, fertilizing large numbers of eggs with their rapid maturity and high reproductive performance. This accelerates the gene flow into native populations.
A study published in Science suggests that proteins normally pass into the kidneys and that kidney disease may result from an inability to draw them back out. Researchers identified at least two patients with kidney disease who lack one copy of CD2AP, a protein critical for kidney function.
Professor Elizabeth Legge explores how British art marketed itself as a failure to gain cultural credibility in the US. She argues that this strategy tapped into American perceptions of British art as gauche and incapable of irony, generating mutual indignation between the two nations.
A new scale aims to improve physician empathy by measuring their personal qualities, particularly in patient care situations. The Jefferson Scale of Physician Empathy has been developed to help identify physicians who need more empathy training and evaluate the effectiveness of medical education programs.
Researchers solved the atomic structure of pilin proteins in Pseudomonas aeruginosa and Vibrio cholerae, essential for bacterial movement and infection. This knowledge provides crucial insights for developing novel antibiotics and vaccines against these deadly diseases.
Researchers at the University of Toronto have discovered a gene, Fkbp6, essential for male fertility but not female fertility. The study shows that the gene plays a critical role in sperm cell development and chromosome pairing, highlighting potential new principles in how cells control the number of chromosomes.
A study of 800 young male army recruits found that nearly 10% could have chlamydia infection, with a higher proportion than previously reported having asymptomatic cases. Infected men were equally active sexually as the general population.
Researchers at the College of William and Mary report that seep mussel beds exhibit higher diversity than vent mussel beds. This discrepancy may be due to a physiological barrier to invasion at vents, limiting dispersal and leading to lower biodiversity.
A new two-step method for identifying transcription factors has been developed, reducing irrelevant regulators by 85%. The tool, ConSite, uses a combination of sequence scanning and conservation analysis to pinpoint regulatory elements.
A more realistic extinction scenario shows that rare and uncommon plant species removal doesn't impact aboveground plant growth, but instead affects remaining rare species. Dominant species impart resistance to ecosystem change even in the face of a 3-fold decline in species.
Researchers argue that age differences in memory studies are influenced by stereotype threat and social contexts. Older adults perform similarly to younger adults when making objective decisions and judging character.
A field study by Vanderbilt University and Indiana University found that wild sunflowers already possess some level of resistance to white mold, reducing the need for genetic modification. The study suggested that transgenes may not spread widely through wild populations if they do not confer a reproductive advantage.
Researchers discovered niobium clusters exhibit ferroelectric behavior when cooled to ultra-cold temperatures, displaying negative and positive charges. The phenomenon is linked to superconductivity in transition metals, offering clues to this complex phenomenon.
A study of 3,306 pilots found that those with over 5,000 hours of flight experience had less than half the risk of a crash compared to less experienced counterparts. The study suggests that flight experience, not age alone, is a crucial factor in determining pilot safety.
The study identifies changes to rate-determining factors at transition points, shedding new light on the nature of non-linear spreading. Researchers used a model to calculate these changes and found them to be crucial for understanding various phenomena such as 'avalanches' in sand piles.
Researchers discovered that blocking copper function prevents artery narrowing and growth after angioplasty, offering a promising new treatment for clogged arteries. The commonly available reagent TTM, a specific copper chelator, stopped inflammation and cell growth, making cells stress-resistant.
The Vanderbilt Meharry Developmental Center for AIDS Research aims to advance treatment and prevention of HIV/AIDS through collaboration and education. The center will focus on racial disparities and minority populations, building on existing collaborations between the two institutions.
A new study published in the Journal of Perinatology reveals a growing incidence of gastroschisis in the U.S., particularly among mothers under 20 years old. Gastroschisis is a birth defect where the intestines develop outside the womb, and its mortality rate ranges from 3-8 percent.
The Three Gorges Dam Project will conduct the largest and most complete experiment on habitat fragmentation, a condition affecting environments globally. The reservoir's creation will isolate species in limited spaces, providing valuable insights into ecological dynamics.
A study published in the American Journal of Public Health found that minorities in low-poverty areas are more likely to use public mental health services, often due to being more visible and attention-worthy. This disparity affects black and Hispanic residents, who are disproportionately represented in high-poverty neighborhoods.
Researchers propose pathogenic bacteria and viruses could originate from outer space, citing the unusual nature of major epidemics like SARS. The novel virus in SARS has been identified as a possible explanation for its unexpected appearance and global spread.
The world's population is aging rapidly, with a quarter of the US population expected to be over 65 by 2030. Various models of care are discussed, including those in the UK, USA, Germany, and Italy. Governments must take initiative to configure or restructure long-term care, examining social and ethical values and public policies on el...
Researchers found that a genetically modified wheat transgene in sunflowers has little effect on wild relatives, suggesting a glacial pace of gene movement. The study suggests examining each transgene and crop on a case-by-case basis to determine potential ecological impacts.
A study by Michigan State University suggests that preserving biodiversity is essential for human health and economic development. The researchers emphasize the importance of finding ways to protect China's vast system of nature reserves while addressing socio-economic challenges.
Researchers found that mycorrhizal fungi interactions with atmospheric CO2 and soil N led to distinct community formations. This study highlights the importance of considering these interactions in predicting plant responses to climate change.
Scientists measured over 1,800 genes in sensory cells from the chicken inner ear, revealing significant differences between the cochlea and utricle. The study provides new insights into the causes of aging-related hearing loss and may lead to therapy that replaces lost sensory hair cells.
A new vaccine has shown promise in inducing an HIV-specific immune response in patients with chronic HIV infection, but further research is needed to evaluate its clinical effect. The vaccine, Remune, was found to increase the production of T helper cells that recognize and attack the virus.
A study by American Association for the Advancement of Science (AAAS) found that monarchs use their internal circadian clock to navigate towards Mexico. The researchers manipulated daily light cycles on butterflies in a flight simulator, showing that disrupted clocks hinder navigation.
A new study from the University of Michigan Health System found no correlation between backpack use and back pain in children. The research suggests that activity level and weight may play a greater role in causing back pain, rather than backpack use.
Researchers found that lithium significantly reduces production of beta amyloid, a key component of Alzheimer's disease. The study suggests that combination therapy with lithium and non-steroidal anti-inflammatory drugs may have an enhanced effect in reducing amyloid peptide accumulation.
Rotarians have awarded Penn a $250,000 grant for Alzheimer's research using funds from their Coins for Alzheimer's Research Trust. This grant builds on the work of Domenico Praticó, who has identified isoprostanes as a promising new avenue for treating Alzheimer's disease.
A Pinellas County, Florida study found that switching from chlorine to monochloramine significantly reduced legionellae bacteria in drinking water supplies, preventing outbreaks of the disease. Monochloramine may be a first community-based intervention strategy for controlling Legionnaires' disease.
A study of 38 households found no significant difference in bacterial numbers with or without antibacterial products, but high bacteria counts were detected on kitchen sponges and sink drains. The researchers suggest that prolonged antibacterial use may promote antibiotic resistance.
Researchers have developed an antibody-coated stent that reduces restenosis and prevents blood clots, leading to improved cardiovascular treatment outcomes. The device captures endothelial progenitor cells to promote healing and prevent re-narrowing of the artery.
A clinical trial with over 2,900 patients found that once-daily Adderall XR significantly improved children's quality of life and reduced ADHD symptoms. The study used the PedsQL instrument to assess four health dimensions: physical, emotional, social, and school functioning.
Half of high school graduates who don't attend college full-time become uninsured for some time after graduation, with many unable to access health care due to cost concerns. Young adults face significant barriers to obtaining insurance coverage through various means.
Researchers at Rice University have developed a method to probe dynamic interactions between smallest atomic particles, enabling studies of individual electron dynamics and quantum phenomena. The breakthrough is crucial for developing quantum computers, which could solve complex calculations in seconds.
A four-week study of adults with ADHD found that extended-release mixed-salts amphetamine medication significantly improved symptoms and functioning. The treatment was well-tolerated and showed no evidence of drug tolerance, according to the researchers.