A team of researchers has demonstrated how a single gene in yeast divides and adapts to improve its environment, showcasing the driving force of natural selection. This study provides the most basic view of how organisms evolve to better adapt to their environments.
A study found a significant increase in low birth weights among NYC babies born after the Sept. 11 disaster, suggesting stress may have contributed. The researchers discovered another peak in low birth weights around Christmas/New Year and April/May, indicating possible long-term effects of stress on fetal health.
The report warns that inadequate pandemic planning, including poor on-the-ground administration and delivery of antivirals and vaccines, could threaten EU security. The survey found that few countries have defined plans for distribution of antivirals or specific guidance on vaccine storage and administration.
A new, rapid and cheap way of estimating the potential risk posed to human health by volcanic ash has been devised. The technique uses state-of-the-art laser technology to analyze the grain size of samples from around the world, allowing emergency response teams to quickly measure the potential risk without high-tech equipment.
A UT research team aims to develop cost-effective methods for analyzing and cleaning up contaminated sites with dense non-aqueous phase liquids (DNAPLs), which pose a major problem at many DOD facilities. The project could lead to significant cost savings, potentially running into the billions of dollars.
Research suggests that young women with estrogen receptor-positive (ER+) breast cancer who undergo adjuvant chemotherapy do not experience higher survival rates than those with ER-negative tumors. The study, published in Breast Cancer Research, found a 5% difference in survival rates between the two groups.
A study by David E. Bloom and David Canning found that most countries are clustered in high or low mortality groupings with little continuum of change between them. The authors suggest a 'big push' theory to help countries near the threshold break into the low-mortality cluster.
A RAND Corporation study finds that the Terrorism Risk Insurance Act (TRIA) improves private insurance markets, saves taxpayers money, and enhances protection for businesses. The study suggests expanding TRIA to include coverage for nuclear, chemical, biological, and radiological attacks.
Researchers at Cincinnati Children's Hospital Medical Center found that Hypoplastic Left Heart Syndrome (HLHS) has high heritability and is likely caused almost entirely by genetic effects. Families with a child with HLHS carry a significant recurrence risk of HLHS or related heart defects.
A new study found that folic acid supplements can dramatically lower blood arsenic levels in individuals chronically exposed to arsenic-contaminated drinking water. The study, funded by the National Institute of Environmental Health Sciences, showed a 14% reduction in total blood arsenic levels in Bangladesh.
The study found that aging stem cells in fruit flies experienced a decline in growth factor unpaired (upd), leading to reduced stem cell numbers. Artificially increasing upd levels delayed the loss of germline stem cells, suggesting that the niche's molecular signals govern stem cell behavior.
Researchers have discovered a key difference in the way gastrulation occurs between higher vertebrate species and less evolutionarily advanced animals. The study reveals that higher vertebrates acquire a new mechanism of 'cell intercalation' to position their axis at the midline, distinguishing them from fish and other lower vertebrates.
A recent study found that cheap and moderately priced running shoes provide similar cushioning impact and comfort as expensive trainers. Plantar pressure measurements showed no significant differences among the shoes, regardless of brand or price.
Human migration out of Africa and into Asia occurred in at least four pulses, driven by climate and sea level changes. The initial migration was thwarted, but subsequent pulses took advantage of stable climates and sea levels to expand into eastern Asia, Australia, and Melanesia.
A study by UC San Diego and HHMI researchers reveals that SMRT protein prevents premature neural differentiation in embryos, highlighting its role in maintaining neural stem cells. The absence of this protein leads to abnormalities similar to vitamin A exposure, suggesting a link between SMRT and retinoic acid-induced differentiation.
Researchers found that red wines, particularly Cabernet, Zinfandel, and Merlot, have anti-microbial properties that defend against food-borne pathogens. The study also showed that grape juice produces similar results, with reseveratrol being a key phytochemical responsible for the findings.
Researchers at Ohio State University developed software to enable remote operation of high-powered instruments like microscopes and telescopes. The software, RICE, utilizes economic principles to optimize network bandwidth, preventing mistakes and reducing frustration.
A study published in the World Journal of Gastroenterology found that electroacupuncture at PC6 can decrease the frequency of transient lower esophageal sphincter relaxation (TLESR) induced by gastric distention in cats. The effect appears to act at the brain stem, mediated through nitric oxide (NO), CCK-A, and mu-opioid receptors.
Researchers identified key brain regions involved in fine tactile spatial discrimination, including the right posteromedial parietal cortex and right posterior intraparietal sulcus. The study's findings may lead to the development of sensory-substitution devices for visually impaired individuals.
Researchers at the University of Utah have developed new peptides that inhibit HIV entry into cells, with up to a 40,000-fold improved antiviral potency over previously reported D-peptides. These peptides resist degradation, making them suitable for oral administration and potentially reducing drug resistance.
The study reveals that adult steroid users are driven and ambitious individuals motivated by physical self-improvement, including muscle gain, strength, and attractiveness. These non-medical AAS users follow a health-centered lifestyle, using directed drug technology as part of their strategy.
Scientists discover that mouse mammary tumor virus (MMTV) can replicate in cultured human breast cells, leading to rapid spread and potential role in human breast cancer. Researchers plan further investigation into the link between MMTV and breast cancer.
Research published in BMC Public Health found that traditional family circumstances and workplace inequality contribute to long-term sick leave among Swedish women. Women reported high physical and mental demands at work, lack of flexibility, and bullying as factors affecting their health.
Research found that obese individuals are six times more likely to develop esophageal cancer compared to those of healthy weight. A combination of obesity, acid reflux, and smoking significantly increased the risk of adenocarcinomas of the esophagus.
Researchers have found that adult stem cells do not rely on the protein Oct4 to remain undifferentiated. Studies using sensitive assays failed to detect Oct4 in these cells, revealing a different regulation of pluripotency in adult versus embryonic stem cells.
Scientists at Brookhaven National Laboratory develop a method to correlate microscopic imaging techniques, leading to better understanding and diagnosis of diseases. The technology enables the study of organic and inorganic components simultaneously, improving disease treatment.
The US Marine Corps has selected Oregon-made training suits for its runners, with the University of Oregon's environmental chamber playing a crucial role in the testing process. The new suits, developed by InSport Inc., were found to be superior to an alternative design in terms of comfort and moisture management.
Researchers found that prolonged antiviral therapy can improve residual liver function and reduce portal hypertension in patients with compensated hepatitis C virus-related cirrhosis. The study, published in the World Journal of Gastroenterology, suggests that this treatment approach may delay complications and prolong survival rates.
A multi-scale modeling study at Penn reveals a new theory of behavior for domain-wall motion in ferroelectric materials, reproducing experimental data long at odds with existing theories. The study confirms that small dipoles play a key role in smoothing transition regions as the wall moves.
The project aims to reveal how some viral infections become resistant to antiviral medications. Researchers will test the interactions between FIV, a cat virus, and an AIDS drug called AZT in the presence of methamphetamine.
The Phase I/II trial tested Lovaxin C in stage IVb cervical cancer patients, with symptoms including flu-like syndrome, fever, chills, nausea, and vomiting. The study found that five patients experienced tumor reductions or complete disappearance of tumors, while seven patients remained stable, and one patient achieved a partial response.
The National Academies of Sciences report introduces new tools to assess health risks from chemicals, enabling better predictive toxicology and risk assessment. These technologies provide critical information on environmental agent interactions with human genes, helping identify individuals at higher disease risk.
Two new centers will address critical ethical, legal and social questions in genetic and genomic research, with a focus on large-scale genomics. The centers will develop innovative research approaches and provide training for the next generation of researchers.
A study published in JADA found that tooth loss is linked to an increased risk of developing dementia. Researchers proposed several possible reasons for the association, including periodontal disease and early-life nutritional deficiencies.
Researchers at Weizmann Institute and Teva Pharmaceutical Industries identified genes linked to improved response in MS patients to Copaxone. The discovery may enable personalized treatment and optimize dosage for each patient.
Researchers develop formula to study linguistic evolution, predicting irregular verbs will regularize at a rate inversely proportional to their usage frequency. The most common irregular verbs, such as 'be' and 'think', are expected to remain irregular for thousands of years.
A recent study found that women with HER-2 positive breast cancer who receive Taxol alongside chemotherapy experience improved survival rates. In contrast, estrogen-receptor-positive and HER-2-negative patients do not benefit from the added treatment, offering a targeted approach to personalized medicine.
A recent study by Michael Inzlicht and Jennifer N. Gutsell found that people who suppress their emotions experience a depletion of resources for self-control, leading to poor performance on tasks requiring self-regulation. This depletion can last even after the initial emotional suppression has ceased.
A large sample size study found endoscopic resection to be a safe and effective treatment for gastrointestinal smooth muscle tumors (SMTs) with base sizes ≤ 2 cm. No severe complications or recurrences were observed in cases treated using the 'pushing' or 'grasping and pushing' technique.
Researchers at the University of Bonn have discovered right-handed and left-handed magnetic vortices, which could be used to store information in hard disks. The discovery has potential practical applications, but the primary interest is in understanding the underlying principles of magnetism.
A retrospective study of 68 postoperative CRC patients found that 18F-DG PET/CT detected more lesions than CT or ultrasonography alone in 30.4% of cases with recurrence and/or metastasis. The imaging technique also helped alter treatment plans in 16.2% of cases.
Researcher Heidi Kloos investigates why young children are stumped by science, particularly the concept of density. Her findings suggest that alternative teaching approaches can help children navigate these waters more smoothly.
A Purdue University study found that biometric devices, such as fingerprint and hand-geometry scanners, contain similar levels of bacteria to doorknobs. Researchers discovered that nearly all bacteria died on the devices within 20 minutes, with E. coli surviving slightly longer than Staphylococcus aureus.
A study reveals a new mechanism controlling how stem cells become either skeletal or smooth muscle cells, with implications for treating heart disease and cancer. The discovery of myocardin suggests new ways to treat diseases driven by stem cell replacement programs.
The Stowers Institute's Xie Lab has discovered that stem cell aging is controlled by both intrinsic and extrinsic factors. The study found that specific proteins, adhesion between cells, and enzyme activity can influence stem cell lifespan and function, potentially leading to the development of new therapies for age-related diseases.
A recent study published in Cell Host & Microbe has found that the protein PB1-F2 from the 1918 influenza virus strain increases virulence and secondary bacterial pneumonia in mouse models. This discovery provides crucial insights into the pathogenicity of IAVs and has significant implications for preparing for future pandemics.
A study published in Thorax reveals a potential early warning system for lung cancer, detecting autoantibodies in blood that are associated with solid tumours and triggered by cancerous changes. The presence of these autoantibodies in patients indicates an 80% chance of a cure if the disease has not yet spread.