This study found that online file-sharing communities, like Napster, exhibit self-imposed rules and symbolisms, similar to traditional gift systems. Online networks have a greater scale and non-sacrificial gifts, providing an alternative consumer-centric model of contemporary gift-giving.
A new study reveals that older American women, particularly those from minority groups, receive significantly lower rates of mammogram screening than previously reported based on self-reported data. The study analyzed national Medicare data and found that the rate of screening among non-white women is substantially lower than that for ...
A study published in the June issue of Family Business Review found that family businesses have a significant edge over non-family firms. The research measured firm performance across various metrics, including profitability, workforce management, and economic output, concluding that family-led companies tend to excel in these areas.
A study by Vahakn B. Shahinian and colleagues found that urologist input significantly influences the use of hormone therapy for prostate cancer patients, with up to 21% of variance attributed to their decisions. This suggests that urologists can be targeted for interventions to modify treatment recommendations.
Research suggests genetics play a role in aggression, but maternal nurturing can mitigate this effect. Variations in serotonin genes are linked to aggressive behavior, especially among men with lower education levels.
A new study reveals that the green crab's expansion in Canada is being driven by multiple invasions, with biologists uncovering cryptic invasions of zebra mussels and brown algae. These invasive species are spreading rapidly, causing devastating effects on Canadian waterways.
A new international collaboration aims to identify genetic variations that affect the body's response to HIV. By analyzing patient cohorts from nine countries, researchers hope to pinpoint common genes influencing the disease progression and develop a vaccine targeting these responses.
Scientists successfully transplanted motor neurons into paralyzed rats, restoring function and improving hind limb grip strength. The study demonstrates the potential for treating spinal cord injuries and diseases like ALS.
Researchers analyzed 19 trials involving 33,826 patients and found that long-acting beta-agonists like salmeterol and formoterol increase the risk of asthma-related deaths by 3.5 times and hospitalizations by 2.5 times compared to placebo.
Researchers discovered higher concentrations of nitric oxide in the seminal plasma of infertile patients compared to healthy men. High NO levels were correlated with greater sperm DNA damage, while low NO levels improved sperm motility.
Researchers found that gray-cheeked mangabeys revisit fig trees after warm and sunny days, rather than after cold and cloudy days. This suggests monkeys use past weather conditions to inform their foraging decisions.
Researchers successfully transplanted embryonic pancreatic tissue from pigs into mice with reduced immune responses, enabling fully functional insulin production and normal blood sugar levels. The study's findings warrant further pre-clinical research on primate models to explore the potential for human transplantation.
A new study suggests that expensive heart rhythm treatment LACA is cost-effective for younger patients with certain risk factors, while older patients or those without additional risk factors may not benefit from the procedure. The analysis used computer modeling to compare costs and benefits of LACA versus traditional drug therapy.
Researchers have developed a new test to detect rare genetic mutations in families at risk of passing on hereditary cancers like FAP. The innovative test allows for precise detection of mutations, enabling couples to make informed decisions about their pregnancies.
Sirtuins have been implicated in the health benefits of calorie restriction, which is known to lengthen life span. The discovery reveals that sirtuins directly control specific metabolic enzymes called AceCSs, transforming them into a form that allows the body to utilize acetate as an energy source.
A study found that ROZEREM was effective in promoting sleep and did not cause lingering effects the next day. The medication was associated with a decrease in time to fall asleep compared to placebo.
A recent study by Dr. Wolfgang Paulus found no increased risk of congenital abnormalities in children born to mothers taking the antidepressant paroxetine during early pregnancy. The researchers suggest that a reliable pharmaco-vigilance system is crucial for documenting fetal outcomes, but more funding and support are needed.
A study of 75 healthy college students found that those who were led to expect considerable nausea fared better than those who weren't. Preparation can have a profound impact on how patients respond to nausea, with the results suggesting that informed expectations may help reduce symptoms and stomach activity.
A study of 566 older mothers found that they prefer their daughters as caregivers, regardless of practical considerations. The sociologists suggest that gender plays a significant role in this preference, with mothers expecting daughters to provide care due to emotional closeness and shared experiences.
Researchers found that naive bats quickly learned to associate a new frog call with edible prey by observing their neighbor eating, even when the call comes from a frog they wouldn't normally eat. The study shows that fringe-lipped bats can rapidly track fluctuations in prey abundance and composition through their social learning skills.
Researchers reviewed data from 156 patients with inflammatory breast cancer and found that a standard combination of therapies did not significantly increase survival rates. The study highlights the need for further research to identify subsets of patients who may benefit from alternative treatment approaches.
Researchers used DNA sequence profiling to re-examine the giant panda population in Wanglang Nature Reserve, doubling earlier estimates and finding no genetic evidence of a demographic bottleneck. The study suggests the species may have a better chance of long-term viability than previously thought.
The study found that DNA repair pathways work at different times during cell development, with homologous recombination active in the first half and non-homologous end joining taking over later. This timing is crucial for the development of various types of cancers.
A recent study using DNA analysis from giant panda feces found the population underestimated by over 50% in previous surveys. The findings suggest a better chance of long-term viability for the species, but warn against complacency due to still-perilously low numbers.
The American Geophysical Union convened an interdisciplinary conference to discuss the science behind hurricane protection and rebuilding on the US Gulf Coast. Key findings include the need for improved seasonal forecasts, better wind data, and enhanced shoreline topography to simulate storm surge and flooding probabilities.
Researchers use digital maps to examine flood landscapes and calculate energy and mechanisms needed to generate shapes. Outburst floods pose a major hazard in mountainous areas, with global warming expected to alter flood sizes and frequencies.
Researchers have developed a new material that uses light to control the attachment of proteins to membranes, allowing for easier cleaning and potential applications in water treatment, drug release, and biosensors. The patented process involves attaching spiropyran molecules to poly(ether sulfone) and exposing them to UV light.
Researchers developed engineered tissue that can conduct electricity, potentially replacing pacemakers in children with heart block. The tissue was tested in rats and shown to integrate with surrounding heart tissue, establishing an electrical conduction pathway.
A new H5N1 vaccine has demonstrated cross-protection in ferrets against different variants of the virus, offering a promising solution for stockpiling in the event of a human outbreak. The vaccine was shown to completely protect ferrets from infection and reduce viral multiplication.
A study found that REM sleep behavior disorder is a precursor to neurodegenerative diseases such as Parkinson's disease and dementia with Lewy bodies. Patients with RBD are at increased risk for developing these conditions, which can lead to serious consequences like brain hemorrhages and death.
A study found a slightly higher rate of major congenital malformations in ICSI children compared to spontaneously conceived children. However, most malformations were minor and corrected by surgery. The researchers also found no significant differences in physical or neurological development between the two groups.
The journal covers core areas of electrical and electronic engineering and related disciplines, with five technical societies responsible for editing one issue per year. Complementary online access is available to institutions for IEEJ Transactions on Electrical and Electronic Engineering.
A study by Ohio University researcher David Holben found that food-insecure Appalachians have a higher risk of obesity and diabetes compared to their food-secure counterparts. The research also highlighted the importance of nutrition education and managing food supply in addressing these health issues.
A new approach to lymph node examination, called targeted lymph node examination, has been shown to improve staging of colon cancer. This technique uses blue dye to identify the sentinel node, which is the first node to receive lymphatic drainage from a primary tumor site.
A recent study at Mayo Clinic suggests a strong association between REM sleep behavior disorder (RBD) in younger patients and antidepressant use. The study found that 80% of RBD patients under 50 years old used antidepressants, compared to 15% of those over 50.
Researchers found that bats quickly learned new foraging behaviors, such as associating frog calls with palatable prey, through social learning. This study suggests that cultural transmission plays a role in the flexibility of bat foraging behavior, enabling them to adapt to changing environments.
Researchers found that IVF embryo culture can alter the expression of imprinted genes, potentially leading to abnormalities such as Beckwith Wiedeman syndrome. The study suggests that modifying culture media and oxygen concentrations may improve gene expression.
Researchers at Cornell University have developed a new technique that allows them to see the polarity and smaller atoms within crystal molecules for the first time. This advancement has the potential to improve the performance of devices such as lasers, which rely on the structure of individual molecules.
The study found that species with smaller range areas are at higher risk of extinction due to increased vulnerability to habitat changes. Larger range sizes, on the other hand, result in fewer but larger populations, making them less susceptible to population wipeouts.
Increases in aridity could lead to contractions in the distribution of nearly all species in southwest Europe, including 62% of European amphibians and reptiles. The Iberian Peninsula's role as a refugia against extinctions during past glacial periods may be at risk with projected climate changes.
Egg donation for stem cell research is a contentious issue, with concerns over informed consent, health risks, and distributive justice. Researchers have developed guidelines to balance bioethical principles and reduce risks for donors, exploring alternative sources of eggs and incentivizing participation.
A review of 1,690 melanoma cases in Miami-Dade County found that Hispanic and black patients were more likely to have advanced-stage melanomas than white patients. This disparity may contribute to lower survival rates among blacks and Hispanics.
A recent study by Scripps Research Institute has identified novel immunogens and genes involved in the development of drug resistance, which could lead to new vaccine targets. The research uses gene-chip technology to analyze the genomes of Plasmodium falciparum parasites.
The Telescope Array in Utah will be 10 times more sensitive than previous experiments and aim to answer the mystery of cosmic rays' origin. The observatory will use fluorescence detectors and scintillation detectors to measure air showers and search for sources of ultrahigh-energy particles.
A genetic variant of BARD1 has been found to be associated with an increased risk of breast cancer, particularly in women who carry the BRCA2 mutation. The study suggests that inheriting this allele may increase a woman's breast cancer risk, but for most women, the risk is only slight.
A randomized trial found abatacept to be effective in reducing disease activity and slowing joint damage in patients with active chronic rheumatoid arthritis. However, the treatment also led to a higher incidence of serious infections and infusion reactions compared to placebo. Meanwhile, hospital care for patients with COPD varies wid...
Antarctic fish use the exocrine pancreas and stomach to produce antifreeze glycoproteins, contradicting earlier assumptions about liver production. The discovery sheds new light on teleost freeze-avoidance physiology.
Regier and colleagues found that patient self-management is a cost-effective strategy for patients receiving long-term oral anticoagulation. The study suggests this approach can provide similar health benefits without the added costs of physician management over a 5-year period.
The inner walls of bones serve as sites for both bone breakdown and reconstruction, with osteoclasts playing a crucial role in releasing hematopoietic stem cells. This process is essential for maintaining balance in the body's response to injury or inflammation, and may have implications for bone marrow transplant techniques.
Safe sleep practices, such as placing infants on their backs to sleep, can significantly reduce the risk of sudden infant death syndrome. The study emphasizes the importance of ensuring a safe sleep environment, including avoiding soft bedding and overheating.
A new method of testing eggs for abnormalities could solve problems of embryo freezing, reducing the risk of miscarriages in women undergoing IVF. The technique analyzes the first polar body to identify viable eggs, resulting in lower early miscarriage rates and improved implantation potential.
The study analyzes data on 9,500 bird species and finds that most have small geographic ranges, while the northern hemisphere shows high variation. Biodiversity peaks in tropical regions, and there's a link between species richness and range size, with high biodiversity areas having smaller ranges.
A University of Colorado study found that adding phosphorus and nitrogen to tropical forest soils in Costa Rica increases CO2 emissions by 20%. The study highlights the impact of human activities on nutrient availability in ecosystems, with potential implications for climate change.
Researchers identified the AgDscam gene, essential for recognizing a broad range of pathogens in mosquitoes. Silencing this gene increases susceptibility to bacterial infections and malaria, highlighting its potential as a target for novel control methods.
Researchers at Iowa State University have developed a new biodiesel technology that uses nanotechnology to create a more efficient and economical process. The technology, led by Victor Lin, accurately controls the production of tiny silica particles to convert raw materials into biodiesel.
A recent study has shown that human activities such as land use, aerosols, and irrigation in arid cities like Riyadh and Phoenix can alter the natural system and affect monsoon flow and mountain convection. These findings have significant implications for water resource management, agricultural efficiency, and urban planning.
A study found that HIV-positive mothers-to-be are at a higher risk of developing anaemia, pregnancy-induced hypertension, and other health issues. Women with HIV also received less antenatal care and experienced lower birth weights, highlighting the need for better guidance on managing pregnant women with HIV.
A new egg freezing technique called Cryotop method has been developed, achieving a more than 90% survival rate for frozen-thawed eggs and a high pregnancy rate of nearly 42%. The process involves rapid freezing in a tiny amount of special vitrification solution, preventing ice crystals from forming damage to the egg. This technology op...
Breakthroughs in melanoma research suggest optimism for future cures, with artificial skin models enabling the study of tumor interactions and immune system responses. A novel vaccine approach also shows promise in treating melanoma by stimulating killer T cells to attack cancerous cells.
Researchers investigate sodium channel genes to identify genetic predictors of hypertension and develop screening methods for high blood pressure in the general population. A study involving 300 healthy youth will measure sodium handling after environmental stress and analyze their genes to correlate with impaired natriuresis.