Researchers found that estrogen can reduce the risk of developing cataracts by up to 77%, with estradiol and estrone showing particular promise. The study used rats with induced ovarian failure to test the effects of different estrogens on cataract development.
A team at the Naval Research Laboratory has successfully demonstrated room-temperature operation of an interband III-V laser diode emitting at a wavelength beyond three microns. This achievement brings gallium-antimony-based technology closer to practical and portable mid-infrared systems needed for military and commercial applications.
The NIAID is spearheading a collaborative network to develop new ways of inducing immune tolerance, promising improvements in transplant success rates and treatment for autoimmune diseases. Researchers will conduct clinical trials using 'tolerogenic approaches' to selectively modulate the immune system.
Researchers have developed a suite of software tools called GETWEBS to design and evaluate broadband wireless systems. The project addresses key components of the wireless industry, including evolving technology, environment interaction, and system integration.
Researchers advocate for standardized examination techniques to improve physicians' precision and accuracy in screening for breast cancer. The study found that spending adequate time on the clinical breast examination (CBE) and using proper techniques can increase early detection of lumps in the breast.
A Mayo Clinic study found that a genetic defect known as long-QT syndrome may be the cause of many unexplained drownings. The research identified a genetic mutation in a 19-year-old woman who died after a near-drowning, and subsequent testing revealed that her mother and sister also had inherited the condition.
Researchers at the University of Chicago are developing new therapies to induce immune tolerance for islet transplants and autoimmune diseases. The grants aim to improve the success of transplants and treatments for type 1 diabetes, lupus, and rheumatoid arthritis.
Emory researchers verify the role of visual cortex in processing sensory information, including touch. The study reveals that visual imagery facilitates tactile discrimination tasks, such as distinguishing orientation via touch.
Researchers at NRL have created a new type of glass material for use in future opto-electronic devices, which could lead to advancements in optical sensors, miniaturized optical systems, high-speed communication components, and more. The material's properties are highly dependent on its layered structure and composition.
The SHOWEX experiment aims to better predict wave formation and severity, improving navigation safety at sea and weather forecasting. Researchers will use a range of instruments, including aircraft, craft, buoys, and subsurface sensors, to study wave components and their interactions.
Researchers find that African ants' pruning behavior increases colony life span, but harms host trees, sparking debate on ecological partnerships. The study sheds light on why weaker competitors can persist in diverse ecosystems.
Researchers at UNC-CH will investigate prostate cancer mechanisms, including the role of androgens, to develop a potential cure. The team aims to understand why black men develop prostate cancer twice as often as white men do.
Researchers at the University of Delaware have created a porous, rainbow-colored metal that acts like a prism, diffracting a spectrum of colors. The material's tiny holes are 20,000 times smaller than existing metal meshes and could be used to steer light in photooptic computer components.
Augusto Sola, a renowned pediatrician, will be honored with the E.H. Christopherson Award for his pioneering efforts in improving neonatal and perinatal care in Central and South America. He has developed training programs for healthcare providers and trained over 100 nurses and 200 physicians.
A microscopic fungus infecting common eastern US grass, tall fescue, can significantly impact plant diversity and local ecosystems. The fungus alters the host plant's growth, making it more toxic to other herbivores and drought-resistant.
Scientists from NASA and Colorado State University present research on the link between water vapor and climate change, highlighting its significant impact on global warming. Water vapor's unique molecular structure and potential heat stored within it influence storm formation and atmospheric circulation.
The North Carolina Health Professions 1998 Data Book shows a 5.4% increase in doctors and a 19.2% rise in nurse practitioners, with the greatest growth in rural counties. However, disparities remain, with some counties having no dentists or just one dentist per 9,000 residents.
Researchers have found that smoke from forest fires practically shuts off the 'warm rain' processes that create rain in tropical clouds. The cloud tops must grow above the freezing level for an alternative mechanism to start producing rain. This study, based on TRMM data, provides direct evidence of the impact of smoke on rainfall.
Researchers at the University of Illinois have isolated and characterized an insulin gene from the marine mollusk Aplysia californica. The study reveals a unique peptide, the 'D' peptide, which is separated from the standard two-chain insulin structure by a 'C' peptide.
A study found that 80% of colonic bacteria contain a gene resistant to tetracycline, highlighting rapid spread of resistance genes. The discovery suggests that other resistance genes are also moving along with the tetracycline resistance gene.
The conference will focus on ibogaine's mechanism of action and clinical, cultural, and political issues surrounding its use. Leading experts in neuroscience, ethnography, and sociology will present on the compound's effects and potential applications.
A cluster of 256 Intel Pentium III microprocessors linked together has created the largest
Researchers have successfully synthesized a look-alike enzyme for hydrogenase, which could lead to an inexpensive and abundant supply of hydrogen. The new version contains 25 atoms instead of thousands found in natural enzymes, but still needs improvement to fully function as a catalyst.
A new questionnaire effectively screens primary care patients for sleep apnea, identifying nearly half of high-risk patients. A man with severe adult-onset rheumatoid arthritis also experienced remission after a stem-cell transplant from his healthy twin, believed to be the first case of its kind.
A study led by University of Southern California researchers found that tamoxifen therapy for breast cancer increases the risk of endometrial cancer by about 50 percent. The risk is higher in women who have previously used estrogens, are overweight, or have a history of estrogen replacement therapy.
NASA scientists find that jet aircraft add a few tens of parts per trillion of nitrogen oxides to the atmosphere, increasing ozone levels. However, the impact is too small to detect, but as air traffic increases, understanding these effects becomes crucial for global climate research.
Researchers at UCSF have discovered how Mycobacterium tuberculosis outsmarts the immune system to cause disease. The microbe disrupts a protein called STAT1, blocking macrophages' ability to respond to interferon gamma, allowing it to survive and infect other cells.
The Pacific Ovarian Cancer Research Consortium aims to discover genes, develop a cancer vaccine, and improve treatment outcomes for ovarian cancer. The five-year study will involve researchers from several institutions and involve at least 3,500 women in its various studies.
Researchers have uncovered six complete bone flutes at a 9,000-year-old Neolithic site in China, which may be the earliest complete, playable, and tightly-dated musical instruments. The flutes, made from red-crowned crane wing bones, have been analyzed and played, revealing a tone scale similar to the Western eight-note scale.
A new Mayo Clinic study confirms that bed partners experience significant improvements in sleep quality when their husbands are treated for obstructive sleep apnea. The average percentage of time spent sleeping increases from 74% to 87%, adding over an extra hour of sleep per night.
The Western Regional Meeting of the American Chemical Society will feature over 300 papers on topics such as environmental science and organic/biochemistry. Dr. Jerome Karle, a Nobel Prize winner, will address the conference.
A University of Iowa research team discovered that DNA methylation can contribute to oral cancer by silencing tumor suppressor genes. The study found that aberrant cytosine methylation patterns were present in oral cancer cells but not in normal human cells, suggesting a potential mechanism for cancer progression.
A new study by University of Washington researchers reveals that dyslexic children use significantly more brain area and energy while performing simple language tasks. The findings provide new evidence that dyslexia is a brain-based disorder and shed light on its developmental mechanisms.
A new device called a magnetorheological damper has been tested on a model building set atop an earthquake-simulating shake table, showing promise in minimizing damage in earthquakes. The device reduces the peak acceleration by 50 percent, and is designed to be inexpensive, straightforward, and powered by a battery.
A University of Chicago study found that neighborhoods with more racially integrated populations have higher rates of bystander CPR during cardiac arrests. In contrast, predominantly white and black neighborhoods had lower CPR rates.
Researchers found that a common mutation in the CYP17 gene is associated with higher testosterone levels and larger, stronger bones in men. The study measured hormone levels, stature, and bone mass in 333 Caucasian men aged 51-84 years.
The Networked Digital Library of Theses and Dissertations (NDLTD) is expanding internationally, with UNESCO joining and collaborations with the NSF, DFG, and ISTEC. These partnerships aim to overcome language and policy challenges, enabling easier sharing of electronic theses and dissertations across countries.
Researchers suggest that testosterone plays a key role in redistributing immune cells to the skin during stress, rather than suppressing the immune system. This redistribution hypothesis is supported by studies in rats and mice, which show improved wound healing rates with testosterone treatment.
A large-scale national study will investigate whether weight loss reduces cardiovascular disease and slows atherosclerosis progression in obese people with type 2 diabetes. The 7-year trial, funded by the National Institute of Diabetes and Digestive and Kidney Disorders, aims to enroll 6,000 participants.
Researchers found slight memory impairment in children on intensive diabetes therapy, with a three-fold higher rate of severe hypoglycemic incidents compared to conventional therapy. The study suggests potential long-term cognitive consequences related to repeated hypoglycemic episodes.
John Moffat, a University of Toronto professor, proposes that the speed of light was not always constant but rather increased over time. This theory could help explain recent discoveries about the accelerating expansion of the universe and provide an answer to some cosmology problems.
Researchers have identified two genes contributing to asthma development: interleukin IL4 and IL13. Decreasing their activity may help reduce asthma attacks, with potential applications to other complex genetic conditions.
Researchers found that loss of the NEP enzyme fuels inflammation in mice with colitis, leading to increased substance P levels and bowel inflammation. Administering the NEP enzyme or blocking substance P can dramatically reduce inflammation, suggesting potential treatments for humans.
Researchers found that calcium absorption decreased with age, especially after the age of 80, leading to increased risk of osteoporosis in older men. Higher levels of fractional calcium absorption were associated with slower rates of hip bone loss.
Diane Coley McGann, a Santa Ana High School teacher, receives the Western Regional High School Chemistry Teaching Award for her innovative approach to motivating students. She has also created a series of workshops to assist teachers in promoting chemistry education.
According to a study, 22.8% of middle school students in North Carolina have smoked within the past 30 days and 39% purchased their cigarettes from a store. Adolescents who were asked for proof of age and denied purchasing cigarettes smoked fewer cigarettes.
Researchers have developed a new family of chemicals that bind specifically to the gp41 pocket, halting HIV's ability to infect cells. The compounds, created using mirror-image phage display, show promise as potential oral treatments for HIV, with advantages including reduced cell membrane penetration and lower likelihood of resistance.
A $55 million grant from NIDA is supporting the development of new drug addiction treatments through collaboration between researchers and community treatment providers. Over five years, Oregon will receive $11 million to test promising science-based treatments in real-life settings.
A study found that tumor necrosis factor-alpha (TNF-alpha) plays a crucial role in early liver damage caused by alcohol consumption. The researchers used gene knockout technology to show that TNF-alpha mediates the development of liver injury, leading to potential new drug therapies for conditions affecting millions of Americans.
A Yale study suggests that breast cancer patients with BRCA1 or BRCA2 genes are at higher risk of late relapses after treatment. Women with these mutations respond well to initial therapy but may develop second tumors years later.
Researchers identified a class of compounds that prevent HIV from infecting cells by blocking the viral entry into the cell. The discovery holds great promise for identifying a new class of oral drugs for treating HIV infection and AIDS.
The discovery of 78 Neanderthal bones at Moula-Guercy suggests that European Neanderthals practiced cannibalism, systematically defleshing and breaking apart the bones to remove marrow and brains. The abundance of natural resources available at the site makes survival-based cannibalism unlikely.
Elevated cholesterol levels are associated with an increased risk of preeclampsia, a pregnancy complication that can lead to seizures, liver or kidney failure, and premature delivery. Women with high cholesterol before pregnancy are more likely to develop the condition, which affects thousands of women each year.
The matrilysin enzyme plays a key role in activating defensins to combat bacterial infections in the intestine. The researchers found that matrilysin is essential for regulating antimicrobial activity and protecting the epithelial lining from bacterial invasion.
Scientists have identified TNF-alpha as a major contributor to early liver injury from long-term alcohol consumption, paving the way for new treatments. The study used gene knockout technology and found that mice lacking TNF receptors fared better on measures of liver injury after alcohol exposure.
Researchers at Howard Hughes Medical Institute uncover the first human disease linked to a defect in the MECP2 gene silencer mechanism. The discovery provides new insights into nervous system development and may lead to new treatments for Rett Syndrome, a neurodevelopmental disorder causing mental regression in young girls.
Researchers have identified a new molecular marker for Alzheimer's disease, a normal cellular enzyme called casein kinase-1 (CK-1), which accumulates in nerve cells damaged by AD. CK-1 levels were found to be abnormally high in vacuoles within the hippocampus region of AD brains.
Researchers at Jefferson Medical College have uncovered a potential switch that helps control the manufacture of red blood cells and blood-clotting platelets. Activating 'death receptors' on immature red blood cells triggers caspases, which can halt excessive production by blocking cell growth and differentiation.
A study of infants with dense cataracts found that visual stimulation, not brain development, is responsible for the five-fold visual improvement within six months of birth. Babies' vision improved rapidly after cataract removal and contact lens fitting, with some developing 20/20 vision.
A team of researchers has identified a genetic link on mouse Chromosome 19 that controls inherited susceptibility to testicular cancer. The discovery uses a new genetic technique called chromosome substitution, which may lead to improved understanding and treatment options for the disease.