Researchers at the University of Oregon have developed a method to organize small gold nanoparticles into linear chains with controlled interparticle spacing, essential for creating electronic and optical applications. The technique uses DNA as a template and has high reproducibility, tolerance for structural defects, and high yield.
A recent study published in the Proceedings of the National Academy of Sciences found that overexpressing a selenium-containing enzyme in mice led to insulin resistance and obesity. The researchers suggest that antioxidants, like selenium, may be harmful by neutralizing free radicals necessary for insulin signaling.
Researchers found that genes critical for learning and memory are reduced in older brains, while those associated with stress and repair mechanisms are elevated. These changes suggest that gene damage may be contributing to age-related cognitive decline.
Research suggests a link between seasonal variations and the timing of menopause, with spring and autumn equinoxes showing a significant peak in menstrual cycle cessation. The study's findings support the idea that environmental factors play a role in regulating female reproductive functions during declining fertility.
A randomized controlled trial found that yoga is as effective as aerobic exercise in improving measures of fatigue in multiple sclerosis patients. The study also showed improvements in physical health and quality of life among participants.
Schwartz aims to develop a computer model of self-assembly within cells, which will help researchers understand mechanisms controlling chemical reactions and identify promising drugs that can target viruses effectively. The grant also supports teaching advanced methods in biological modeling and simulation.
Researchers found that older adults with Alzheimer's symptoms can still use implicit memory to perform tasks, similar to young adults. By training these individuals using repetition and practice, their performance can be improved, according to a new study.
The detection of molecular nitrogen in interstellar clouds promises to enhance our knowledge of interstellar chemistry and the formation of planets. FUSE, a satellite-telescope designed at Johns Hopkins, allowed astronomers to probe dense clouds where N2 is expected to be dominant.
Researchers found that under drought conditions, tropical forests and desert ecosystems have similar maximum rain-use efficiency, a measure of total plant growth per unit of precipitation. This discovery indicates an upper limit to ecosystem productivity, which may impact climate change scenarios.
Researchers have identified two types of hub proteins, 'party' and 'date', which interact with partner proteins in different ways. The study's findings suggest that removing non-hub proteins has little effect, while eliminating hubs causes a significant increase in connection length, implying a more complex network structure.
The oldest Antarctic ice core has been analyzed, revealing eight ice ages and warmer periods over the past 740,000 years. The study's findings suggest that without human influence, the present warm period could last at least another 15,000 years.
A new study found that the brain's amygdala interacts with memory-related brain regions during emotional memory formation, contributing to its emotional resonance. The researchers discovered a significant correlation between activity in emotion- and memory-related brain regions during emotional memory formation.
Deforestation in the Amazon leads to faster land heating, causing localized upward motions that enhance cloud formation and increase rainfall. The effects are most pronounced during the dry-to-wet season transition period.
A breakthrough in brain-machine interface technique uses electrocorticographic (ECoG) activity to record brain surface signals, enabling humans to control computers with their minds. The study achieved high accuracy rates and promises potential applications in prosthetic limb control for individuals with disabilities.
Scientists have identified a genetic basis for alcohol response in roundworms, discovering that subtle variations in the NPR-1 gene affect tolerance. The study found that strains with higher levels of NPR-1 protein exhibit reduced ability to recover from alcohol exposure.
A novel mutant gene variant of MLH1 significantly increases the risk of colon cancer among Israeli patients, with a 40-percent lifetime risk. Researchers discovered the gene in Sephardic and Ashkenazi Jews, Muslim and Christian Arabs, and other ethnic groups, suggesting its widespread presence globally.
The new EPICA ice core provides a complete record of the past interglacial period, allowing scientists to study it in detail. This will help separate human-caused impacts from natural climate fluctuations, providing valuable insights into climate change and its effects.
Researchers found that Cox-2 inhibitors slowed disease progression in men with recurrent prostate cancer by inhibiting tumor growth and increasing programmed cell death. The study showed significant results in 22 of 24 patients, with a 92% reduction in PSA levels after three months.
Researchers will test the effectiveness of a mechanical chest compression device to treat out-of-hospital sudden cardiac arrest. The study aims to improve survival rates, which have remained stagnant for 30 years, and has the potential to benefit millions.
Scientists discovered that certain brain systems remain intact in individuals with Alzheimer's disease, enabling the retention of implicit memory capabilities. Structured training programs may be an effective approach to improving cognitive function.
A low-cost robotic vehicle has been designed to detect land mines in rough terrain, marking their location with a spray of paint. The device can be controlled from up to 500 feet away and is estimated to cost $1,000 or less, including detection sensors.
A recent study suggests that exercise is the predominant lifestyle determinant of bone strength in young women, with daily calcium intake showing little impact on adult bone mass. The research found that physical activity accounted for between 16% and 22% of variation in hip bone mineral density and bending strength.
A study published in the Journal of Personality and Social Psychology found that maternal grandmothers are closer to their grandchildren than other grandparents. The researchers discovered that preferential investment stems from genetic uncertainty, with maternal grandmothers being the closest followed by paternal grandfathers.
Researchers have identified a possible connection between the IRF1 gene and tamoxifen resistance in breast cancer. By adding interferon to antiestrogen therapy, tumors may become sensitive to treatment, potentially inhibiting new cancers or disease reoccurrences.
Research found that women's intercourse frequency increased during fertile days, peaking at ovulation. The study of 68 women over three months showed a 24% increase in intercourse during fertile days compared to the rest of the cycle.
Boston University's CMLD program develops methodologies for diverse, high-quality chemical libraries needed for biological research and drug discovery. The e-lab notebook provides web-based access to protocols and tools for outside researchers to synthesize new compounds.
Physicists have developed a new method to calculate top quark mass with improved precision, allowing researchers to explore the previously inaccessible energy range of the Higgs boson. This breakthrough could lead to a better understanding of how particles acquire mass and solve one of science's great conundrums.
A team led by Tohru Saito will install an upgraded weather station on Mt. McKinley, measuring relative humidity, barometric pressure, and wind speed from an outcrop at 19,000 feet elevation. The station will transmit data every 30 minutes to IARC and be available worldwide.