The study found that 92.5% of detained juveniles experienced one or more traumatic events, with boys reporting more experiences than girls. The prevalence of post-traumatic stress disorder (PTSD) was also higher among this population, particularly among those who reported witnessing violence.
Researchers discover HIV mutations that prevent immune system from recognizing protein fragments, allowing virus to replicate and increase in number. This finding highlights the importance of considering nearby regions not recognized by the immune system when designing vaccines.
Research suggests that women with BRCA1 or BRCA2 mutations are more likely to choose double mastectomy, with 48% of those who tested positive opting for the surgery compared to 24% without a mutation. Genetic counseling and testing can help patients make informed decisions about their treatment.
Researchers have made groundbreaking discoveries in carbon nanotubes, with the smallest diameter yet found. Additionally, negative refraction has been observed in liquid surface waves, while a new form of high-density water has been discovered at the interface between ice and silicon dioxide.
A study by Northwestern University found that over 90% of delinquent youth had experienced at least one traumatic event, with boys reporting higher rates than girls. The researchers recommend improving mental health services for high-risk youth and detecting post-traumatic stress disorder in juvenile detainees.
Female ticks require six to 10 days to engorge fully, a process stimulated by an engorgement factor protein in male seminal fluid. Researchers have identified this protein and developed a vaccine candidate to protect cattle against tick-borne diseases.
Organ donations from living donors are less common in Canada due to cultural variations. Non-Western cultures perceive death as a more integrated state than Western societies do, making organ donation challenging for some individuals. Healthcare professionals must be aware of these differences and provide respectful care.
A new study of people with newly diagnosed Alzheimer disease found that median survival period was significantly shorter than similar-aged individuals. The severity of cognitive impairment and other factors were strongly associated with decreased survival. Meanwhile, the US Preventive Services Task Force recommends screening for alcoho...
A study found that parents who sit in nonsmoking sections can lower their child's chances of becoming a smoker by 13% by 12th grade. Meanwhile, parents who don't use nonsmoking sections have 42% daily smokers among their children.
Researchers found that Tourette syndrome patients' brain activity during memory tasks normalized after receiving levodopa treatment. The study used functional magnetic resonance imaging and showed increased activity in certain brain regions, which decreased after treatment.
A study by Children's Hospital Boston found that lesbian and bisexual teenage girls are at a heightened risk for tobacco use, likely due to antigay stigma and harassment. The study suggests that these girls may be more susceptible to nicotine addiction and require targeted prevention efforts.
A study of 5,800 California adolescents found that gun threats were more common than self-defense instances, with most threats coming from other teenagers. The research suggests that gun use for self-defense often involves hostile interactions between teens with weapons.
A study found that infants fed protein hydrolysate formula for seven months developed a taste preference for the formula, while those fed standard milk-based formula rejected it. Early flavor exposure influences long-term food choices.
Researchers at UT Southwestern Medical Center have discovered a second chemical pathway that enhances smooth-muscle cell contraction when the primary pathway is limited. This finding has implications for treating conditions such as hypertension and other smooth muscle-related disorders.
These materials have potential uses in lasers, drug detection, and sensors, offering new possibilities for applications with minimal energy cost. Professor Warner's research has increased interest in liquid crystal elastomers, which could lead to further discoveries.
Researchers found that African mole-rat eyes have anatomically well-developed retinas and a surprisingly high proportion of cones, which is unusual for blind animals. The density of rods, used for night vision, is also lower than expected in subterranean mammals.
Scientists can now spend an unlimited amount of time on the bottom of the ocean, sharing observations in real-time with colleagues worldwide. Internet2 technology was tested during a Black Sea expedition, allowing for the transmission of underwater video images and acoustic signals.
A new study, led by experts at the University of Rochester Medical Center, explores the effects of environmental agents and toxins on children's health. The report highlights the significant knowledge gap in understanding how environmental factors affect children compared to adults.
Research links severe atherosclerosis to increased prevalence of depressive disorders in older adults. Patients with coronary and aortic calcifications are at higher risk of developing depressive symptoms.
Researchers found urban surfers reported almost twice as many symptoms as rural surfers due to water exposure. The study suggests current pollution guidelines may not be sufficient to protect public health from general water runoff.
A new study finds that cephalosporin drugs are more effective in treating strep throat than penicillin, with a superior bacterial cure rate. First-generation cephalosporin drugs offer the same narrow-spectrum effect as penicillin at comparable costs.
Researchers caution against linking strep bacteria to neuropsychiatric disorders like OCD and tics in children. Neurologist Roger Kurlan and Edward L. Kaplan argue that the criteria for establishing a connection between strep and behavioral disorders are too vague, citing a lack of evidence from large, carefully controlled studies.
The TPN Calculator significantly reduced medical errors and saved time for healthcare providers. With the online calculator, errors decreased by nearly 90%, allowing caregivers to dedicate more time to patient care. The system's development preserved the existing ordering process while improving efficiency and reducing calculation errors.
Researchers develop environmentally friendly nano-coatings with unique properties, enabling new devices for consumer electronics and sensing applications. The innovative technology utilizes 3D nanostructures and nano-honeycomb structures to produce sustainable materials and devices.
A UCSD study found that adolescents who engaged in less vigorous physical activity were more likely to be overweight or at risk for obesity. The researchers also discovered that fiber intake was closely linked to weight, with normal-weight teens consuming more fibrous foods like whole grains and fruits and vegetables.
Scientists have determined for the first time how drought conditions can be quantified over large forest areas in the Amazon rainforest from space. Using a combination of ground-based and space-based tools, they found that satellite imaging can measure the physiology of the rainforest canopy with high accuracy.
Individuals with alcohol use disorders were almost five times as likely to have antisocial PD or histrionic PD, while those with drug use disorders were 11 times more likely to have antisocial PD. The co-occurrence of personality disorders with alcohol and drug use disorders is pervasive in the US population.
Scientists found that common cholinesterase inhibitors ease behavioral symptoms like agitation and psychosis in patients with existing symptoms. The medication also delays the onset of these behaviors in patients not yet displaying them.
Researchers have identified three new Geophagus fish species in South America, shedding light on the region's biodiversity and ecosystem importance. The discoveries add to ongoing efforts to catalog the approximately 4,475 freshwater fish species found in the region.
A new calculator tool, developed by Mayo Clinic researchers, helps physicians estimate colon cancer patient prognosis and aid in treatment decisions. The calculator considers four factors: lymph node status, tumor depth, grade, and age to provide more accurate five-year survival estimates with or without adjuvant chemotherapy.
The grant will fund studies on how the enzyme, DNA polymerase, accurately copies genetic information, revealing its unique catalytic selectivity and minimizing errors, which could inform cancer research.
A study found that almost one-fifth of asthma parents believe exercise is dangerous for their children, leading to lower physical activity levels. Children with moderate or severe asthma are also less likely to engage in high levels of physical activity due to parental misconceptions.
A study found that breast cancer patients with BRCA 1/2 mutations are twice as likely to opt for a double mastectomy after receiving genetic counseling and testing. Genetic counseling and testing have been shown to significantly impact treatment decisions among high-risk patients.
A new MRI technique allows researchers to capture moving images of blood traveling through vessels non-invasively. This technology can easily be applied to existing MRI machines, enabling real-time physician-scanner interaction and detailed analysis of cardiovascular disease.
Researchers equipped dendritic cells with genetic material from patient's tumor and PAMPs to break T-cell tolerance, enabling activation of immune system. This approach merges strengths of viral vaccines with ease of using patient's own immune system.
Research finds that passive smoking hinders healing by changing the arrangement of fibroblast cells' cytoskeleton, making them less mobile and more prone to abnormal scarring. This can lead to slower wound closure rates in smokers compared to non-smokers.
A large-scale Swedish study found that low vitamin B12 levels are associated with poorer memory in older adults with a high risk of developing Alzheimer's disease. The study also showed that genetic factors, such as the apolipoprotein E gene, interact with nutritional deficiencies to affect cognitive function.
Defects in mitofusin 2, a critical mitochondrial fusion gene, underlie CMT type 2A. Gene therapy may alleviate symptoms by restoring lost gene function.
A two-stage weight loss surgery approach reduced mortality and operative risk in high-risk, morbidly obese patients. Patients who underwent the less drastic initial procedure showed significant improvements in life-threatening co-morbidities.
Beutler's work uses forward genetics to study human genes used by the innate immune system. He identified a protein called Trif, which helps the body respond to viruses and bacteria.
Researchers use nanoelectromechanical systems to detect masses as small as 6 attograms, a third of the mass of a typical virus. The technology has potential for detecting and identifying microorganisms and biological molecules.
A study by Express Scripts found that antidepressant use increased significantly among children and adolescents between 1998 and 2002. The fastest-growing segment was preschoolers aged 0-5 years, with use doubling in girls and growing by 64% in boys.
A recent study by Cornell University found that NYC firefighters experience high levels of PTSD, depression, and anxiety after the 9/11 attacks. The study also highlights the importance of open communication, teamwork, and employee involvement in decision-making to improve firefighter well-being.
Researchers have successfully used PET imaging to detect dementia in macaque models. The study utilized the peripheral benzodiazepine receptor to identify macrophage activity, which is linked to neurodegeneration.
Researchers have discovered a shared gene regulation mechanism in all major plant groups, controlled by microRNAs, and this system has been conserved for 400 million years. This finding opens up new possibilities for understanding plant development and evolution.
A staggering 42% of documented extinctions are mollusks, highlighting the importance of conservation efforts for these species. Nonmarine mollusk diversity is valued for its own sake and as an indicator of ecosystem health.
A study found that 156 inner-city black adolescents who practiced transcendental meditation twice daily for four months lowered their daytime blood pressures, with an average drop of 3.5 millimeters in systolic pressure and 3.4 millimeters in diastolic pressure.
A specific mutation in the KCNMB1 gene is associated with lower blood pressure, according to a study published in JCI. Researchers found that individuals with this mutation had lower diastolic blood pressure compared to those without it. The study suggests that targeting the beta1 subunit may have therapeutic potential for treating hyp...
The National Academies are accepting nominations for the 2004 Communication Awards, recognizing outstanding achievements in science communication. The winners will be honored at the Keck FUTURES Conference in November 2004.
A gain-of-function mutation in the KCNMB1 potassium channel subunit is associated with a lower prevalence of diastolic hypertension. The beta1 subunit of the Ca2+-sensitive K+ channel protects against hypertension, as outlined in an accompanying commentary.
A team of scientists has found that water molecules in liquid form clump much more loosely than previously believed, challenging 20 years of research. This discovery reopens the hunt for a better understanding of water's unique properties and potential applications in fields like biology.
A team of archaeologists from Boston University has uncovered the story of life among rural Maya in Belize's Sibun River Valley during the Late Classic Period. The research reveals a community that practiced sustainable agriculture and maintained dense vegetation to support their trade product: cacao.
A new study has found that Bim regulation plays a crucial role in determining hippocampal vulnerability after injurious seizures and in temporal lobe epilepsy. The researchers suggest that understanding the molecular mechanisms underlying this relationship may lead to new therapeutic strategies for treating these conditions.
Researchers at Rensselaer Polytechnic Institute developed a software program that quickly identifies molecules with sound medicinal properties. The software uses shortcuts in chemistry and math to rapidly analyze vast molecular databases, predicting which compounds have the right chemical features for specific therapies.
A team led by scientists at Stanford Synchrotron Radiation Laboratory found that water molecules form only two hydrogen bonds instead of the previously believed three or four. This discovery reopens the hunt for the structure of liquid water and could lead to a better understanding of the chemistry of cells.
Corn's genetic origins have been revised after a study found it arose from a serendipitously viable cross between teosinte and gamagrass. Eubanks' research confirms teosinte was an ancestor of corn, with gamagrass contributing key genes.
Activation of antigen-presenting cells (APCs) by microbial products leads to the breakdown of self-tolerance in the immune system. This breakdown induces autoimmune disease, a condition where the immune system mistakenly attacks healthy tissues.
Researchers from UC San Diego have generated and analyzed the rat genome, paving the way for comparisons with human and mouse genomes. The study reveals that around 40% of the modern mammalian genome derives from a common ancestor, with the rat data showing similarities to human and mouse genomes.
Astronomers successfully measured the size of Sagittarius A*, the mysterious object at the center of the Milky Way Galaxy, using the National Science Foundation's Very Long Baseline Array radio telescope. The black hole has a mass nearly four million times that of the Sun and would fit easily inside Earth's orbit.
Protein nanostructures have been created using a novel method that allows for precise control over their shape and size. The technique involves the use of nanoparticles to guide the assembly of protein molecules into specific structures.