A study published in the American Journal of Clinical Nutrition found that high levels of homocysteine correlate with lower cognitive test scores and decreased cognitive function in the elderly. Higher plasma concentrations of folate and B-12 were associated with improved cognitive performance.
A study using satellite ocean color data has shed light on the spring bloom of phytoplankton in the North Atlantic, a critical factor in the carbon cycle and global warming. The research found that simple models can accurately predict the timing of the bloom, with plankton animals and bacteria playing a key role in its duration.
A new genetic adaptation allowed Yersinia pestis to be transmitted through the bite of an insect, a discovery that sheds light on the evolution of the plague bacterium. The enzyme PLD plays a critical role in the survival of Y. pestis in the midgut of fleas.
A gene mutation that affects antioxidant production is associated with a 50% increase in heart disease risk, even among those without traditional cardiovascular risk factors. Individuals carrying the mutation have an 80% higher risk of developing brain vessel disease.
Two studies found that hungry children are more likely to experience depression and suicidal thoughts, as well as lower academic performance. One study analyzed data from over 700 adolescents and found those living in food-insecure households were five times more likely to attempt suicide.
A significant proportion of elderly people in the UK experience poor hearing, with around a quarter failing a whispered voice test. The study highlights challenges in improving detection and management of reduced hearing, as well as increasing ownership and use of hearing aids.
The Dynamic Brain Atlas project utilizes Grid technology to create customized brain atlases from hundreds of images. This allows radiologists to identify subtle brain abnormalities and improve diagnoses for psychiatric conditions and dementias.
Researchers have discovered that the old drug sirolimus can also protect blood vessels of transplanted hearts, preventing chronic rejection. The study found that sirolimus can stop proliferation of smooth-muscle cells, which build up scar tissue and block oxygen supply to the heart.
Researchers at Rensselaer Polytechnic Institute have discovered that single-walled carbon nanotubes (SWCN) emit a loud pop and then ignite when exposed to a conventional photographic flash. This phenomenon, known as the photo-acoustic effect, has been observed for decades but not previously associated with carbon nanotubes.
Young women with anorexia nervosa exhibit varying reactions to bone density results, with some finding motivation for recovery later in their course. The timing of the measurement seemed to be a key factor in these responses.
Researchers found that humans can acquire immunity to hepatitis C virus, reducing the risk of persistent infection and its complications like liver cirrhosis and cancer. The study's findings add to growing evidence that vaccines could be used to protect against hepatitis C.
Elderly individuals with untreated systolic hypertension are three times more likely to experience adverse cardiovascular events than those with normal blood pressure. Early treatment for high blood pressure significantly reduces cardiovascular risk, particularly among those free of detectable disease at study entry.
The study found that high-intensity physical training significantly improved cardiovascular fitness profiles and reduced abdominal fat in obese adolescents. Moderate-intensity physical training had less impact on these outcomes.
The New Focus Student Awards recognize groundbreaking research by six finalists, including Seth Aubin's work on francium trapping, E. Staffan Björlin's vertical-cavity semiconductor optical amplifiers, and Michael J. Escuti's switchable mesoscale lattices in liquid crystal polymer dispersions.
Researchers discovered that calcification of breast blood vessels is associated with an increased risk of stroke. Women with diabetes, older age, and low educational background are at higher risk. Mammograms might one day be used to better determine a woman's cardiovascular risk.
Emerging Generation IV machines will provide significant improvements in reactor design, economics, safety, and waste minimization. Advanced designs include high-temperature reactors that can produce hot water for communities or desalination energy.
Researchers at USF Center for Aging and Brain Repair investigate whether stem cells from human umbilical cord blood can reverse age-related declines in learning and memory. The 5-year study aims to determine the effectiveness of these cells in treating neurodegenerative diseases like Parkinson's and Alzheimer's.
The University of Maryland Medical Center has successfully reduced barriers to kidney transplantation for African-Americans, cutting the median waiting time from 1,335 days to 681 days. The comprehensive program includes patient education and living donation efforts, leading to better graft survival rates.
A new study challenges the Hispanic paradox, finding that U.S.-born Mexican Americans have higher rates of heart disease deaths than non-Hispanic whites. Researchers also found that Mexico-born Hispanics were not significantly different in mortality risk.
The Optical Society of America honored its 2002 award winners, recognizing their significant contributions to various fields of optics. Notably, James P. Gordon received the Frederic Ives Medal for his seminal work on quantum electronics, while Emil Wolf was awarded the Esther Hoffman Beller Award for his influential educational work.
New research adds to evidence that acetaminophen may prevent colon cancer in lab animals. The study found that pretreating animals with acetaminophen significantly protected them against cellular changes indicative of colon cancer. However, more animal research is needed before humans can be studied in clinical trials.
A study of 246 women with eating disorders found that those with anorexia nervosa were 57 times more likely to commit suicide. Women with bulimia nervosa were also at risk, particularly those with depression and anorexic symptoms.
Declining physical activity levels are strongly associated with increasing obesity rates. A 15-year study found that higher intensity physical activity was inversely related to obesity, suggesting a physically active lifestyle can help prevent weight gain.
Men and women who smoked cigarettes had a significantly increased risk of heart attack, with female smokers facing an 80% greater risk than their peers. This contradicts the initial assumption that leanness is cardio-protective, highlighting the need for further research.
Researchers at MIT have developed a biodegradable smart suture that can change shape in response to temperature changes, potentially solving medical implant challenges. The new material has shown promise for creating temporary shapes in confined spaces, such as those associated with minimally invasive surgery.
Researchers at Duke University Medical Center investigated the impact of taste and smell deficits on cancer patients' weight loss and nutritional status. Adding flavor-enhancing powders derived from foods like cheese, bacon, garlic, and fruits showed promise in improving appetite and immune function.
A new study found that a specific gene stimulates an activity-boosting enzyme in the brain's visual processing centers of honeybees, leading to changes in foraging behavior. The gene's impact on foraging is similar to its effects in other species, suggesting a crucial role in understanding how genes influence behavior.
Researchers have identified gamma-delta T cells as a crucial component of the immune system in wound repair. These cells recognize an antigen released by keratinocytes during injury and produce growth factors that help proliferate epithelial cells, leading to wound closure.
A Dutch study found that heavy tea drinking was associated with a significantly lower risk of heart attack, particularly when combined with a healthy diet and lifestyle. The study suggested that flavonoids in black tea may help prevent excess vascular damage from ischemic heart disease.
Researchers discovered that manganese can significantly lower HIV's reverse transcriptase enzyme activity. By targeting the manganese transporter, scientists may develop a new class of anti-retroviral drugs to stop HIV replication.
Scientists conducted a study on genetic markers in families with multiple members diagnosed with schizophrenia, finding potential associations on chromosome 1q. However, these genes are thought to influence only a small proportion of patients, highlighting the complexity of unraveling complex diseases.