Researchers estimate that about 16 percent of near-Earth asteroids are likely to be binary systems, with some featuring a three-to-one size ratio. Five such binary systems have been identified by radar, offering insights into their formation and potential for collision with Earth.
The study found that older patients fared better at high-volume hospitals for certain high-risk surgeries, including cancer and heart valve replacements. Higher volume hospitals had lower death rates compared to lower volume hospitals, particularly for patients over 65.
The study analyzed tobacco industry documents and found that they lobbied against the Directive 98/43/EC at both EU member state governments and a pan-European level. The investigation's findings highlight the need for effective tobacco control legislation in Europe.
Researchers predict that global climate change will cause substantial changes in the distribution of Mexican bird, mammal, and butterfly species. The study found that changing climate is predicted to bring about great instability, with some local communities losing up to 40% of their species.
University of Pittsburgh researchers found that short abstinence periods, depression/anxiety bouts, and a caregiver's smoking history increase the risk of relapse. They also developed a non-invasive ultrasound technology to detect heart recovery, enabling successful weaning from left ventricular assist devices.
Researchers have discovered three promising microorganisms that can infect and kill termites, providing a potential solution for termite infestations. The microorganisms appear to work by breaking down the termites' bodies through enzymatic degradation mechanisms.
A study published in the Journal of Clinical Endocrinology and Metabolism has linked six genetic base substitutions to absorptive hypercalciuria, a condition that causes about 45% of all kidney stones. The presence of these base substitutions increases the risk of bone loss and osteoporosis.
Researchers have identified a molecular mechanism that controls a 'failsafe' device in endothelial cells, which marks them for apoptosis and blocks abnormal new blood vessel growth. This discovery may lead to the design of new anti-angiogenic drugs or improved existing treatments.
A University of Pittsburgh study found that heart transplant patients who resume smoking after a short abstinence period or with depression/anxiety within two months are more likely to relapse. The study also identified a strong predictor: caregivers who smoke.
Researchers at the University of Houston have developed a new resistive memory technology that can store information even when power is turned off, potentially replacing current RAM and hard drive technologies. This technology could enable faster processing and high-speed data transfer for multimedia and broadband applications.
A genomic study has identified 149 genes that are turned on or off during simulated asthma attacks in cynomolgus monkeys. The study uses microarray technology to analyze gene expression changes, providing valuable insights into the genetic regulation of asthma.
Researchers discuss using lignin, a natural polymer from wood, to replace oil-derived resources in industrial materials and make them biodegradable. Lignin can be used in various products, including automotive brake pads, wood panels, and insulation boards.
The study reveals significant differences in human and chimpanzee brain gene and protein expression, with humans accumulating expression differences at least five times faster than chimpanzees. This discovery may provide insights into the genetics underlying diseases that affect humans but not chimps.
A randomized trial found that nicorandil reduced the risk of cardiovascular events in patients with stable angina, including deaths due to coronary heart disease and non-fatal heart attacks. The study showed a significant reduction in acute coronary syndromes and all cardiovascular events compared to the placebo group.
A UK trial suggests that flexible sigmoidoscopy is a suitable tool for population screening of colorectal cancer, with high attendance rates and low perforation risks compared to colonoscopy. The study's findings highlight the need for tailored approaches to screening, taking into account individual risk factors and efficiency.
A study by the University of Minnesota Rasmussen Center found high prevalence of covert and overt cardiovascular disease in healthy individuals. Early screening using non-invasive testing can detect risk contributors, such as family history of heart disease.
Researchers have developed a new technique to track the health of marshes in Chesapeake and Delaware Bays, revealing widespread degradation due to sea level rise. The study suggests that up to 70% of marshland has been affected, with implications for coastal ecosystems and the North American carbon budget.
School connectedness is a student's feeling of belonging and care at school, with classrooms where students get along playing a key role. Despite school size, teacher experience or education level, classroom climate has no bearing on school connectedness.
A Northeastern University study reveals a significant decline in average scores of top golfers at the Masters Tournament from the 1930s to 2001, indicating rapid improvement and increased competition. The study also found that Tiger Woods' level of dominance is comparable to Jack Nicklaus' record-breaking performance in 1965.
Virginia Tech researchers are studying xylan, the natural glue in wood, to develop new materials. They aim to understand the hierarchy of components assembled in composite materials by mimicking nature's structure at the nanoscale.
A team of researchers has found that the continents have warmed significantly over the past half-century, similar to the warming of the oceans, atmosphere, and ice. The study used temperature readings from six continents to reconstruct a temperature history for the Earth's surface over the past 500 years.
A recent study published in Science reveals that chimpanzees and humans have strikingly different patterns of gene expression in the brain, with humans exhibiting accelerated evolutionary change. This difference may hold clues to understanding medical traits such as AIDS, malaria, and Alzheimer's disease.
Researchers found that children as young as 5 have stereotypical preferences for musical instruments, with boys mostly picking masculine instruments. Girls are more flexible in their choices and can adopt more masculine attributes as they get older. The study suggests that these stereotypes can be modified through intervention, but the...
A new study found that galantamine improves cognition and daily living activities in patients with vascular dementia. The medication was also shown to reduce symptoms of behavioural changes, providing a potential treatment option for patients with limited pharmacological help.
Golan Yona creates a multi-dimensional map of known proteins to predict structure and function. By analyzing physical shape, topology, and amino acid sequences, researchers can guess protein functions and predict structures for new genes.
Scientists have discovered a key gene responsible for tomato ripening, which could lead to tastier and more nutritious grocery store tomatoes. The discovery allows researchers to moderate the ripening process, creating tomatoes that ripen at different speeds.
Researchers propose that social insects like ants, bees, and wasps provide a unique opportunity to study genetic imprinting. This process involves the labeling of genes by mothers and fathers before passing them on to their offspring, leading to conflicts between maternal and paternal genes.
Researchers discover immune proteins that viruses once exploited have evolved to call in attacks against their former exploiters. This finding suggests that the immune system may be turning the tables on pathogens, and could lead to new strategies for fighting viral infections.
A Mayo Clinic study found that youth football injuries are rare and often mild. The risk of injury increased with the player's age and level of play, but not with body weight. Most injuries were contusions, while fractures involving the ankle growth plate were more common in higher grades.
Scientists have successfully implanted cartilage made from stem cells in mice, showing promise for repairing damaged tissues. The study uses fat cells to produce cartilage-like cells that can be used as implants to treat injuries and diseases.
Human cloning has raised concerns about individual uniqueness and self-identity, but an expert argues that these are influenced by qualitative traits beyond genetics. Brock suggests that history, relationships, and personal experiences shape our sense of identity, making cloning less likely to undermine human potential.