Researchers found that moderately intense disturbances contribute to high tree species diversity in tropical rain forests. The study challenges previous findings, which suggested no effect of disturbance on diversity, and instead supports the intermediate disturbance hypothesis. The presence of heliophilous trees indicates recent canop...
Researchers investigated gas exchange between infants and their environment while sleeping facedown on soft bedding. They found that hypoxemia, not hypercarbia, is the more important factor contributing to SIDS deaths, suggesting a new approach to prevention.
The use of biased conservation lists is exacerbating the rate of species extinctions, according to Associate Professor Mark Burgman. The lists focus on large, spectacular species, neglecting lesser-studied groups that are more vulnerable to extinction.
Researchers developed a new technique, electrohydrodynamic atomization (EHDA), to produce monodisperse droplets of defined size for inhalation therapy. EHDA produced corticosteroid aerosols in quantities high enough for patient administration, showing promising results for more effective asthma treatment.
Scientists have identified over 100 new protein machines in baker's yeast, revealing a third of the genome's complex relationships between proteins. The study provides insights into cellular functions and tasks performed by molecules.
Researchers at Lehigh University have discovered a possible cause-and-effect relationship between DHEA and the workings of the body's central nervous system. The study found that DHEA influences gene function through interaction with androgen receptors, potentially contributing to improved neuron survival and cognitive function.
Researchers found that preauthorization was granted in only half of visits, and denied or downcoded in the remaining 50%. The lack of timely reimbursement creates a financial burden on patients and hospitals. Prudent layperson laws aim to eliminate prior authorization and retrospective denials for emergency care.
The risk of injury requiring medical attention on amusement park rides is one in 124,000, while the risk of fatal injury is one in 150 million. Giant roller coasters produce high G forces that can cause neurologic injury.
Researchers investigate the effects of musical training on young children's verbal and writing skills, as well as its potential benefits for older adults' cognitive preservation. The study, led by Dr. Christo Pantev, aims to uncover how musical training modifies brain development and its life-enhancing effects in the elderly brain.
A new treatment combining CPT-11 and cisplatin has shown superior results in prolonging survival for patients with small-cell lung cancer. Patients receiving this treatment had a 55% improvement in one-year survival and were four times more likely to be alive at two years.
Rochester's innovative double-helix curriculum assesses students' performance in real clinical sessions, emphasizing patient-physician interaction and interpersonal skills. The program has attracted national attention and potential federal recognition for its focus on reducing medical errors and improving care quality.
Researchers at UCSD have discovered that silicon wafers can be easily made into tiny explosives, ideal for rapid chemical analysis of toxic metals. The explosives can also be used as power sources for micro-electrical mechanical systems, enabling the creation of self-destructing devices.
The study predicts a range of possible future vCJD deaths from BSE exposure, with estimates between 50-150,000. Researchers suggest risk-reduction strategies to reduce current and future risk by up to 90%.
Astronomers have detected X-ray radiation from the Milky Way’s center for over two decades, but the origin remained a mystery due to poor resolution. The new image reveals individual X-ray sources and hot gas, leading scientists to conclude that most high-energy radiation comes from white dwarf stars, neutron stars, and black holes.
Theoretical physicist Peter Feibelman found that water molecules dissociate near the surface, forming a 3-D ice cube instead of a puckered hexagon. This discovery explains why a flat water layer exists on metal surfaces, which has implications for micro- and nanotechnology.,
Researchers from Ohio State University have successfully measured the mass of a gravitational microlens in a dim binary star system 6,500 light-years away. This technique could be used to detect dark matter within our galaxy and help explain the missing mass of the universe.
Astronomers estimate masses of distant black holes using a new method developed by Marianne Vestergaard, allowing for more accurate understanding of quasar behavior. The study challenges previous theories suggesting a threshold mass above which black holes cause quasars to become radio-loud.
The discovery provides the first evidence that planets at earthlike distances can survive the evolution of their host star into a giant. The planet orbits iota Draconis, an old star with a radius 13 times that of the sun, and has an elliptical orbit that takes 1.5 years to complete.
Researchers propose a new mechanism to explain the X-ray galactic ridge's origin, involving low-energy cosmic rays interacting with neutral molecular clouds. The study suggests that this process can produce the observed X-ray emission without requiring dramatic events or unusual astrophysical processes.
Scientists discovered that adding a vitamin C component can facilitate the transport of drugs across the blood-brain barrier, which selectively regulates chemical movement. The study suggests potential applications for treating central nervous system diseases, viral infections, and neurodegenerative disorders.
Scientists at Johns Hopkins have identified GNAS1 as the gene responsible for progressive osseus heteroplasia (POH), a disease causing rice-size bone fragments to form under the skin and inside organs. The discovery may lead to new treatments blocking problem-causing bone fragments and potentially treating other bone problems like oste...
Researchers at the University of Melbourne are developing crayfish-inspired robots that can navigate complex terrain and perform tasks with minimal brain power. The study aims to advance biomimetics, a field that harvests nature's best design ideas for robotics.
Scientists at Johns Hopkins Medicine found that panic disorder and manic depressive (bipolar) illness are likely related genetically and share a common cause. The study analyzed 203 families with bipolar disorder and identified symptoms of major mood disorders in relatives, showing a strong genetic link between the conditions.
A team at Cellzome developed a novel approach to systematically use protein interaction maps in drug discovery, enabling researchers to better assess protein roles and predict drug effects. The yeast proteomic map provides a framework for integrating data from literature and experiments.
A new model developed by researchers suggests that the risk of contracting mad cow disease from infected sheep is likely to be higher than from cattle due to stricter control measures. However, implementing regulations such as slaughtering young sheep and banning animal products in feed can reduce this risk significantly.
UCSD researchers identify fibulin-5 as essential for elastic fiber development and organization. Mice without fibulin-5 exhibit severe skin and lung problems, including emphysema and aortic stiffness.
Researchers at the University at Buffalo have performed simulations that mimic hydrocarbon combustion, demonstrating a defining feature of combustion and gaining insights into the two-way interaction between chemistry and turbulence. The work aims to develop more realistic models of fluid mechanics and chemistry involved in combustion.
The new method reduces drop size using a three-stage cycle, resulting in smaller drops with improved printing quality and reduced material consumption. The technique has potential applications in pharmaceutical research, genomics studies, and other fields where precise liquid deposition is crucial.
A recent study suggests that listeners can recall instance-specific acoustic features in music, enabling them to identify favorite performers or familiar voices. The research found that both musically trained and untrained subjects could distinguish changed musical sequences from the original ones.
Researchers have identified new star structures in the halo of the Milky Way that could alter the standard model of the galaxy. The discovery was made using data from the Sloan Digital Sky Survey, a cataloging project that has imaged millions of stars.
Researchers have developed a non-invasive method to visualize brain lesions indicative of Alzheimer's disease in living patients using FDDNP and PET scans. This breakthrough will enable doctors to monitor disease progression and test new treatments more effectively.
Researchers have found evidence of turbulence and thick gas in the Magellanic Stream, a vast river of hydrogen flowing into the Milky Way galaxy. This discovery could provide new insights into cosmic cloud and star formation processes, as well as the billion-year evolution of galaxies.
A recent study found that infants can generate protective immune responses to multiple vaccines simultaneously, using only a small percentage of their immune system. Current research also shows that vaccine formulations have been refined to contain fewer antigens, reducing the risk of overwhelming the infant's immune system.
A survey of university undergraduate students found that over half had body piercings, while only 23% had tattoos, with piercing complications being the most common issue. Medical experts noted that tattooing may pose a risk for certain infections, but further studies are needed to confirm this.
A team of astronomers led by UMass' Daniel H. McIntosh found evidence of galaxies transforming in response to their environment. They observed three massive galaxy clusters and discovered a link between a galaxy's surroundings and its evolution, with blue galaxies forming stars while reddish galaxies have few stars.
The Physics First movement seeks to create a science-literate population by introducing physics in high school, rather than later. Preliminary analysis from a study shows that while many teachers are skeptical about reversing the traditional sequence of sciences, those who already teach early physics are enthusiastic about teaching it.
Researchers have discovered that the compound C75 profoundly suppresses appetite by altering brain messengers in mice. This effect could lead to new ways to intervene in obesity-related diseases.
Scientists have successfully genetically altered human blood stem cells to selectively activate genes in developing immune cells, providing a potential breakthrough for gene therapy. The research uses a lentivirus to transfer a fluorescent protein gene into stem cells, which then express the gene only in specific immune cells called an...
A new mathematical theory developed by Vanderbilt University professors can produce more accurate digital representations of complex signals, overcoming limitations of current methods. This has significant applications in areas such as music, photography, medical imaging, astronomy, geophysics, and communications.
A new study finds that raloxifene, an osteoporosis medication, reduces breast cancer risk by 76% in postmenopausal women with high estrogen levels. Women with low estrogen levels receive no reduction in risk.
A new theory suggests that an ancient supernova explosion may have devastated the Earth's ocean ecosystem, causing widespread extinction of plankton and marine organisms. The discovery was made by linking data from paleontology, geology, and astronomy fields.
Case studies illustrate how special-interest groups influence policies on needle exchange programs, ergonomics, and mammograms. The authors suggest that institutions must address vested interests to ensure the appropriate use of scientific evidence.
Researchers discovered a small molecular variation that inactivates the neurofibromin tumor suppressor gene, leading to increased tumor development. The finding suggests a new mechanism by which RNA editing can disable tumor-suppressing genes, potentially contributing to cancer progression.
A new UCSF study reveals that the KSHV epidemic in San Francisco gay men occurred before the HIV epidemic, and was linked to oral intercourse. The study found a steady prevalence of KSHV infection among gay men from 1978 to 1995, despite a significant decline in unprotected anal intercourse.
The report reveals that foreign immigration played a significant role in driving growth in the nation's population and labor force between 1990 and 2000. Massachusetts and New York were among the top states for dependence on immigrants, with all labor force growth in the state attributed to foreign immigration.
A study led by the NIH/NIAID identified Norwalk-like viruses as the primary cause of gastroenteritis outbreaks in Maryland nursing homes. The research revealed six distinct genetic clusters among these viruses, with a predominant GII 'Bristol-like' virus strain detected in 14 of the 20 outbreaks.
A recent study found that pregnant women who smoke are more likely to have a premature or low birthweight baby if two specific genes related to chemical modification of cigarette smoke are inactive. The research, funded by the March of Dimes, identified these genetic variations as risk factors for low birthweight and prematurity.
Researchers found enormous cosmic bubbles, dubbed 'ghost cavities,' containing faint radio emissions that may hold magnetic fields. These bubbles could be crucial in creating new stars and shaping galaxy cluster structure.
Researchers John Debes and Steinn Sigurdsson predict unstable planets will collide, creating 'reborn' planets around white dwarfs. This process could create heavy bombardment of material into inner planetary systems, explaining phenomena like dusty white dwarfs and metal-polluted atmospheres.
A new study published in the American Journal of Preventive Medicine found that foreign-born women have a higher risk of dying from heart disease and stroke compared to U.S.-born women. The study suggests that lower rates of hormone replacement therapy use and higher rates of hypertension may be contributing factors.
Researchers at Lawrence Livermore National Laboratory presented preliminary findings associating unique gas flows with rapidly rotating black holes. The study aims to explain unusual periodic timing properties in X-rays emitted near suspected black holes.
The American Academy of Neurology has reviewed new drugs for treating Parkinson's disease, but found that they do not offer significant advantages over existing treatments. Current treatment guidelines remain unchanged, emphasizing the importance of individualized treatment decisions.
Researchers combined infrared images with Hubble data to study ancient galaxies, including those similar to the Milky Way. The team identified over 100 billion stars in some galaxies, offering insights into their age, distance, and formation.
A new study reveals that wealthier neighborhoods have more supermarkets, while poor neighborhoods rely on mom'n'pop stores and specialty food stores. This disparity limits the availability of healthy foods, increasing the risk of chronic diseases like diabetes and congestive heart failure.
Researchers at the University of North Carolina at Chapel Hill have discovered that carbon nanotubes can store more energy than conventional graphite electrodes, potentially leading to longer-lasting batteries. The study found that carbon nanotubes can contain roughly twice the energy density of graphite.
A randomized controlled trial found that peer support significantly increased breast-feeding rates among primiparous women. At 4, 8, and 12 weeks postpartum, mothers in the peer-support group had higher breast-feeding rates than those in regular care, with 92.4% vs. 83.9%, 84.8% vs. 75.0%, and 81.1% vs. 66.9%, respectively.
Researchers identify potential link between serotonin-enhancing drugs and increased risk of cerebrovascular syndrome (stroke). The study suggests that caution should be exercised when combining medications that contain serotonin enhancers, particularly in patients presenting with sudden-onset headaches.
Astronomers have produced a new spectral atlas of massive, hot O-type stars in the Magellanic Clouds. The atlas provides detailed information on the stars' temperatures and life cycles, helping researchers analyze these critical engines driving galaxy evolution.
Rice University researchers have developed a new technique to calculate the distance of gamma-ray bursts, enabling scientists to learn more about the early universe's formation and evolution. The method uses changes in color to determine the cooling rate of high-energy pulses in these cosmic events.
A study of 1,507 people with diabetes found that 71% are aware of their high blood pressure and 57% take medication, yet control rates remain inadequate. Effective treatment strategies are needed to address the disparities in blood pressure control among people with diabetes.