Researchers at Johns Hopkins Medicine discovered that injecting ciliary neurotrophic factor (CNTF) into obese mice with leptin deficiency or resistance reduced their heart muscle walls by up to a third and the size of the left ventricle by 41%. This breakthrough suggests a novel brain-signaling pathway for obesity-related heart failure.
The Mars Express and NASA's Mars Reconnaissance Orbiter missions are providing valuable insights into Mars' upper interior. The combination of radars on the two missions will directly map the structure of the upper portions of the interior, revealing information about water, ice caps, and crust deformation.
A study by Washington University researchers reveals that heat-loving microbes create energy through various reactions, including the use of sulfur and hydrogen. The findings hold clues to the origin of life on Earth, suggesting a high-temperature environment as the likely last common ancestor.
A recent study indicates a significant increase in antibiotic-resistant community-acquired Staphylococcus aureus (MRSA) infections, affecting urban populations in the Atlanta area. The study reveals that 72% of community-onset skin and soft tissue infections are now due to MRSA USA300 strain.
A research team led by Professor Eberhard Bodenschatz has experimentally tested two theories on how particles separate in strong turbulence. The results, which agree with George Batchelor's predictions but not the Richardson-Obukhov law, suggest that particles move more slowly away from each other than previously assumed.
Researchers isolated genes from the starlet sea anemone to understand body-plan patterning. They found that two types of proteins encoded by these genes are expressed differently in anemones compared to bilateral animals like flies and frogs, suggesting an ancient function for this signaling system.
The NCAR team predicts that Cycle 24 will produce larger-than-usual sunspots, affecting satellite orbits and power systems. Scientists developed a model tracking subsurface movements of sunspot remnants for more than 98% accurate forecasts.
Scientists at NIST have developed an experimental atomic clock using ytterbium 'pancakes' that could be more stable and accurate than current time standards. The new design holds thousands of atoms in a lattice made of intersecting laser beams, which is also applicable to other atoms with even-numbered atomic masses.
Researchers have developed a method to estimate oxygen levels in grain boundaries of superconductors, which can enhance their critical current density. This technique, called pressure-induced oxygen relaxation, could make it easier to manufacture reliable ceramic superconductors.
Researchers found that free-living hummingbirds in Canadian Rocky Mountains have impressive timing abilities, remembering interval between visits to individual flowers. They can maintain 'independent stopwatches' for up to eight different flowers, allowing them to plan efficient nectar harvesting
Researchers discovered that bats employ sophisticated techniques to locate prey in cluttered environments, including adjusting the timing and frequency of their ultrasonic pulses. By analyzing high-speed camera footage and audio recordings, the team found that bats 'strobe' the air with sound to distinguish insects from background noise.
A team of researchers from Johns Hopkins University and Los Alamos National Laboratory found that large fluid vortices raid their smaller neighbors in an energy grab, sustaining a steady-state inverse energy cascade. This phenomenon forms a food-chain of vortices, with larger ones preying on smaller ones.
A recent study suggests that depressive symptoms in adolescent girls may be a predictor of subsequent partner violence. Among the 1,659 girls involved in an opposite-sex relationship, those with high depressive symptoms were found to be 86% more likely to experience moderate to severe partner violence.
Researchers have made the fastest measurements of molecular vibrations, using a new technique that detects UV photons emitted by molecules under laser pulses. The results show atomic nuclei moving at varying speeds in different isotopes, providing insights into molecular dynamics.
Researchers found that a third of patients without signs of reduced blood flow during exercise testing had temporary changes in heart rhythm or restricted blood flow when role-playing stressful situations. This phenomenon may indicate more severe coronary artery disease in these patients.
A study of 72 children in Ecuador found that prenatal pesticide exposure was associated with higher systolic blood pressure and decreased ability to copy shapes. The effects of prenatal exposure may last into childhood, with stunting also linked to impaired cognitive function.
Community surveys overestimate depression due to flawed methodologies that fail to account for normal life stress reactions. Experts call for contextual criteria to accurately diagnose mental disorders.
David Vanderbilt's work simplifies computer calculations to understand material atomic structure and create new materials. His methods have broad applications in physics, chemistry, and engineering.
The newly discovered Triceratops skull provides valuable insights into the dinosaur's growth patterns, suggesting that its horns and frill had a purpose beyond sexual display. The fossil, estimated to be around three years old, shows significant changes in the development of its frill and horn shape from juvenile to adult stages.
Xencor's engineered antibody Fc variants show enhanced effector functions, killing tumor cells 10 times more toxic than conventional treatments. These advancements hold promise for developing next-generation antibody therapeutics.
A new study suggests that aspirin is beneficial for preventing heart attacks and events in men at 5-10% coronary heart disease risk. The therapy also becomes cost-effective when combined with statins for high-risk patients.
The US Consumer Product Safety Commission (CPSC) has adopted a new federal standard for mattresses, setting a maximum heat release rate to reduce the risk of flashover. The standard is expected to save an estimated 270 lives and prevent 1,330 injuries annually.
Research finds that postpartum depressive symptoms in mothers are associated with reduced breastfeeding rates, less frequent playtime, and reduced interaction with infants. The study emphasizes the need for pediatricians to screen for maternal depressive symptoms and provide guidance on interactive parenting practices.
A recent study found that elevated lactate dehydrogenase (LDH) levels can define a subgroup of sickle cell patients at risk for serious complications such as pulmonary hypertension and leg ulcerations. Patients with high LDH values had reduced survival rates compared to those with lower LDH values.
Researchers found that fish raised with environmental features, such as small stones, had larger brains and a more developed cerebellum than those without. The study's findings could impact the design of hatcheries for breeding fish to restock wild populations.
A team of neuroscientists has identified a specific molecular mechanism that targets the machinery causing fusion process, allowing for controlled release of neurotransmitters instead of an all-or-none release. This discovery has important implications for treating neurological conditions and may lead to new drugs.
The journal will focus on empirical research and theory related to women and girls in the criminal justice system, including research on female offenders and victims. It aims to demonstrate the gendered nature of crime and responses to crime, highlighting the need for a more nuanced understanding of female criminality.
Researchers found that students who self-test frequently while studying on their own perform better in retention tests compared to those who study the material repeatedly. This phenomenon is known as the testing effect, which enhances long-term retention through a mechanism different from restudy alone.
Despite more than 79% approval rate, Europe only approves a limited number of orphan drugs due to concerns about quality, efficacy and safety. Only 18 orphan drugs were approved between 2000-2004, often under exceptional circumstances.
Research suggests that depression and anxiety disorders in girls and women are associated with higher body mass index (BMI) and greater weight gain over time. Women with a history of depression were found to weigh more and experience faster yearly weight increases than those without the condition.
Scientists have made a breakthrough in understanding how Mycobacterium tuberculosis survives within immune cells, revealing a sophisticated protein-cleaning mechanism that could be targeted by new anti-TB drugs. This discovery may lead to effective treatments for TB and potentially eradicate the disease from infected individuals.
Researchers found widespread evidence of evolution in all populations studied, with signals of positive selection detected in genes related to metabolism, skin pigmentation, and brain development. The study identified over 700 recently evolving genes, including the lactase gene, which enabled Europeans to digest milk into adulthood.
Researchers developed an automated technique to track and analyze protein NuMA in breast tissue, identifying a pattern between normal and malignant cells. The new imaging tool aims to determine cancer subtypes, predict tumor behavior, and guide personalized treatment.
Researchers found that a protein called Cryptochrome helps regulate the biological clock in fruit flies, similar to its role in mammals. The study provides new insights into the human biological clock and its relationship to sleep-wake cycles and overall health.
A Mayo Clinic study found that patients with rheumatoid arthritis have preserved hearing and are no more susceptible to hearing loss than those without the disease. However, rheumatoid arthritis patients were more likely to perceive they had hearing problems due to their disability level.
Scientists have found that there are two separate visual streams in the brains of healthy individuals, one for perceiving objects and another for guiding actions. This discovery was made using functional magnetic resonance imaging (fMRI) and provides new insights into the neural basis of perception and action.
Researchers have found that mispaired nucleotides, also known as wobble pairs, increase transfer RNA's ability to build proteins. This increased reactivity enhances protein production and promotes the movement of DNA and RNA molecules.
A mutation in the EAAT2 gene, which regulates glutamate levels in the brain, is associated with elevated plasma glutamate and increased risk of post-stroke neurological problems. Stroke patients with the mutated allele had higher plasma glutamate levels and more severe neurological outcomes than those with the normal allele.
The article discusses scientific fraud prevention and the growing concern of community-acquired MRSA infections. The key responsibilities for addressing misconduct can be shared among institutions, co-authors, and journal editors.
Researchers at the Stowers Institute for Medical Research have identified a key family of transcription factors, the Snail proteins, that play a crucial role in controlling vertebral formation. This discovery provides new insights into the process of embryonic segmentation and may hold potential for understanding cancer progression.
The American Physiological Society sponsors annual David S. Bruce Undergraduate Research Awards to recognize excellence in undergraduate research. Four students will be chosen from among 12 finalists to receive the $500 award, which is presented at the Experimental Biology conference.
A Johns Hopkins study found that emergency departments across the US struggle to stabilize children in critical conditions, with many failing to administer life-saving treatments. The researchers suggest that hospitals conduct regular drills to identify areas for improvement and enhance their pediatric care.
Researchers found that extinction-proof population sizes are impossible to predict based on species characteristics alone. The study highlights the complexity of extinction risks and challenges traditional assumptions about species survival.
A study found that nearly 18% of mothers experience depression in early infancy and that maternal depressive symptoms have an unfavorable impact on active engagement with the child. Mothers with depressive symptoms were less likely to play with their infants daily and show them books compared to those without symptoms.
A new selection tool using 'synthetic validity' could revolutionize hiring by streamlining processes, saving businesses billions of dollars annually. This system has also been applied to online dating, aiming to create more precise matches with better long-term results.
A new study identifies areas with potential species extinction risk, highlighting the need for proactive conservation efforts. Researchers found that many species currently deemed safe could leapfrog into high threat categories, emphasizing the importance of protecting vulnerable species before they become endangered.
Researchers identify specific brain function responsible for counting 'how many' versus 'how much', a major finding in understanding dyscalculia. The discovery could lead to better diagnosis and treatment of the learning disability, similar to recent breakthroughs in dyslexia.
The study found that the 2004 earthquake was caused by rupture of a 1,000-mile stretch of the megathrust, spanning up to 93 miles at the surface. This has global implications for understanding earthquake hazards and may require reassessment of subduction zones previously thought to be at low risk.
The UK College of Social Work is launching a quality improvement center to study the effects of private agencies on child welfare services. Research and demonstration projects will be conducted to test the effectiveness of selected privatization models.
A meta-analysis of 24 clinical trials involving over 4,500 pediatric patients found a higher risk of suicidal ideation and behavior when taking antidepressants. The FDA has required warnings and close monitoring for children taking these medications.
Researchers predict Cycle 24 sunspots will span 2.5% of Sun's surface, peaking in 2012, with improved forecasting tool helioseismology used to analyze recent solar cycles and forecast future activity.
Researchers in Hong Kong found that flu outbreaks increase hospital admissions for heart conditions, stroke, diabetes, and respiratory diseases. Influenza was responsible for 11.6% of respiratory disease admissions, comparable to temperate countries.
The HIAPER aircraft will fly over treacherous whirlwinds, known as rotors, in the California Sierra Nevada range. Scientists will study the rotors' structure and evolution to improve forecasters' ability to predict when and where they occur.
Fermilab's Tevatron collider has achieved a record-breaking luminosity of 872 inverse picobarns, producing an unprecedented number of collisions. The collider's high-energy performance is expected to enhance the chances for scientific discoveries before the Large Hadron Collider takes over in 2007.
A randomized controlled trial led by Cara Ebbeling and David Ludwig found that a six-month beverage-focused intervention reduced sugary drink intake in teens by 82% and resulted in significant weight loss. The study suggests that making noncaloric beverages available to adolescents can have a substantial impact on body weight.
A new Stanford University study found that organic fertilizers produced less environmental harm than synthetic chemicals, reducing nitrogen pollution and greenhouse gas emissions. Organic farming also promoted the growth of beneficial denitrifying bacteria, which converted excess nitrates into harmless gases.
Researchers discovered ancient ship timbers at Wadi Gawasis site, dating back approximately 4,000 years, indicating a 2,000-mile round-trip voyage to Punt, a southern Red Sea trading center. The findings confirm the Egyptians had the naval technology to travel long distances by sea.
Scientists will analyze air and aerosol pollutants using aircraft, ground stations, and satellite observations. The goal is to understand the impact of urban pollution on regional and global climate, ecosystems, and visibility.
A 14-year study of wild capuchin monkeys reveals that fathers almost never mate with their daughters, despite alpha males siring most offspring from unrelated females. This suggests the evolution of sophisticated behavioral barriers to prevent inbreeding within individual populations.
A Swedish Twin Registry study found that neuroticism is a significant risk factor for anorexia, particularly in women. The disorder is estimated to be 56% heritable, with environmental factors contributing to the remaining percentage.
Researchers analyzed genetic data from three distinct populations and found roughly the same number of signals of positive selection within each population. The study also identified previously known sites of recent adaptation, such as the lactase gene, which enabled the digestion of milk to continue into adulthood.
A new study suggests that regionalizing heart attack care, similar to trauma care, could be feasible for the US. Nearly 80% of Americans live within a 60-minute ambulance trip of an angioplasty-performing hospital, with most being able to reach one within 30 minutes.
Researchers used Transcranial Magnetic Stimulation to test frontal cortex role in non-language tasks. Participants struggled with understanding others' actions after left frontal cortex stimulation, suggesting its importance for social cognition and communication.
Researchers at the University of Manchester have created a new bio-gel for 3D cell culture that mimics natural cell scaffolds. The gel, made from dipeptides, has potential applications in wound healing and regenerative medicine.
The NIST Structural Database has been upgraded to improve the quality of its crystal structure data, ensuring accurate results for materials analysis. The database now includes standardized data and additional fields for enhanced analysis capabilities.
A study found that depressed older adults are more likely to develop cognitive impairment within six years, with those experiencing moderate to high depression facing nearly twice the risk. The researchers discovered no correlation between depression and vascular disease, suggesting alternative mechanisms for the association.
Researchers trained adult ferrets to localize sounds despite obstructed hearing, finding that frequency of training was crucial for improvement. The study showed that the brain can adapt to abnormal spatial cues rapidly with intensive training, suggesting potential benefits for patients with hearing disorders.
Researchers at the University of Illinois have developed a method to stabilize lipids and create biocompatible capsules. These capsules can be used for drug delivery, enzyme-catalyzed reactions, and biosensors, offering new possibilities for health and agricultural applications.
Researchers at the Max Planck Institute for Solar System Research discovered 'anti-planetary' electron rays on Saturn that fly away from the planet, similar to those observed on Earth. These findings suggest a fundamental process underlying polar lights, which were previously only seen on our planet.
Researchers found that four major parameters return to normal after one day, and all changes recover within three days. Blood pressure variability is a key predictor of competition time, with low frequency variability being the most significant factor.