Immigrants who come to the United States from Mexico arrive with a significant amount of undiagnosed disease, tempering previous findings that immigrants are generally healthier than native-born residents, according to a new study. About half of recent Mexican immigrants who have diabetes are unaware they have the disease and about one-third of those with high blood pressure are unaware of the illness, according to findings published in the December edition of the journal Health Affairs. The undiagnosed disease explains about one-third of the "healthy immigrant effect" ...

AMHERST, Mass. – Inside many growing cells, an active transport system runs on nano-sized microtubule tracks that resemble a highway, complete with motors carrying cargo quickly from a central supply depot to growing tips or wherever materials are needed. In spite of the cell's busy, high-traffic environment, researchers know the system somehow works efficiently, without accidents or traffic jams. Now a team of biophysicists at the University of Massachusetts Amherst, using a special technique and unique microscope, have improved upon earlier studies that used too-simple ...

Recent studies have noticed a strong positive correlation between the concentration of nitrogen in forests and infrared reflectance measured from aircraft and satellites. Some scientists have suggested this demonstrates a previously overlooked role for nitrogen in regulating the earth's climate system. However, a new paper in Proceedings of the National Academy of Sciences, shows that the apparent relationship between leaves' nitrogen levels and infrared reflection is spurious and it is in fact the structure of forest canopies (the spatial arrangement of the leaves) that ...

Parents whose children move far away from home are less likely to become depressed than parents with children living nearby, according to a new study of rural districts in Thailand. The study, led by scientists at King's College London, suggests that children who migrate to urban areas are more likely to financially support their parents, which may be a factor for lower levels of depression. Dr Melanie Abas, lead author from the Institute of Psychiatry at King's said: 'Parents whose children had all left the district were half as likely to be depressed as parents who ...

ALEXANDRIA, Va. — The American Society of Clinical Oncology (ASCO) has just released its annual report on the top cancer advances of the year. Clinical Cancer Advances 2012: ASCO's Annual Report on Progress Against Cancer, highlights major achievements in precision medicine, cancer screening and overcoming treatment resistance. "Consistent, significant achievements are being made in oncology care with novel therapeutics, even in malignancies that have previously had few treatment options, as well as defining factors that will predict for response to treatment. ASCO's ...

Stanford, CA — Plants grow upward from a tip of undifferentiated tissue called the shoot apical meristem. As the tip extends, stem cells at the center of the meristem divide and increase in numbers. But the cells on the periphery differentiate to form plant organs, such as leaves and flowers. In between these two layers, a group of boundary cells go into a quiescent state and form a barrier that not only separates stem cells from differentiating cells, but eventually forms the borders that separate the plant's organs. Because each plant's form and shape is determined ...

For decades, a source of powerful earthquakes and volcanic activity on the Pacific Rim was shrouded in secrecy, as the Soviet government kept outsiders away from what is now referred to as the Russian Far East. But research in the last 20 years has shown that the Kamchatka Peninsula and Kuril Islands are a seismic and volcanic hotbed, with a potential to trigger tsunamis that pose a risk to the rest of the Pacific Basin. A magnitude 9 earthquake in that region in 1952 caused significant damage elsewhere on the Pacific Rim, and even less-powerful quakes have had effects ...

TORONTO, Dec. 3, 2012—Mandatory rules such as restricting body checking can limit aggression and reduce injuries in ice hockey, making the game safer for young people, a new study has found. Rule changes could be incorporated into existing programs that reward sportsmanship and combined with educational and other strategies to reduce hockey injuries, according to researchers at St. Michael's Hospital. The need to address the issue is critical, said Dr. Michael Cusimano, a neurosurgeon. Brain injuries such as concussions frequently result from legal or illegal aggressive ...

BALTIMORE, Md. (December 3, 2012) – In the first study to compare mental health-related emergency department (ED) visits between children with and without autism spectrum disorders (ASD), researchers found that ED visits are nine times more likely to be for psychiatric reasons if a child has an ASD diagnosis. Published in the journal Pediatric Emergency Care (Epub ahead of print), the study found externalizing symptoms, such as severe behaviors tied to aggression, were the leading cause of ED visits among children with ASD. Importantly, the likelihood of a psychiatric ED ...

NASA's Curiosity rover analyzed its first solid sample of Mars in Nov. with a variety of instruments, including the Sample Analysis at Mars (SAM) instrument suite. Developed at NASA's Goddard Space Flight Center in Greenbelt, Md., SAM is a portable chemistry lab tucked inside the Curiosity rover. SAM examines the chemistry of samples it ingests, checking particularly for chemistry relevant to whether an environment can support or could have supported life. The sample of Martian soil came from the patch of windblown material called "Rocknest," which had provided a sample ...

A scientist at the University of British Columbia and Vancouver Coastal Health has identified the molecule that controls a scissor-like protein responsible for the production of plaques – the telltale sign of Alzheimer's disease (AD). The molecule, known as GSK3-beta, activates a gene that creates a protein, called BACE1. When BACE1 cuts another protein, called APP, the resulting fragment – known as amyloid beta – forms tiny fibers that clump together into plaques in the brain, eventually killing neural cells. Using an animal model, Dr. Weihong Song, Canada Research ...

SAN FRANCISCO—Scattered around the Milky Way are stars that resemble our own sun—but a new study is finding that any planets orbiting those stars may very well be hotter and more dynamic than Earth. That's because the interiors of any terrestrial planets in these systems are likely warmer than Earth—up to 25 percent warmer, which would make them more geologically active and more likely to retain enough liquid water to support life, at least in its microbial form. The preliminary finding comes from geologists and astronomers at Ohio State University who have teamed up ...

SAN FRANCISCO—Researchers have made a genetic analysis of the microbes living deep inside a deposit of Marcellus Shale at a hydraulic fracturing, or "fracking," site, and uncovered some surprises. They expected to find many tough microbes suited to extreme environments, such as those that derive from archaea, a domain of single-celled species sometimes found in high-salt environments, volcanoes, or hot springs. Instead, they found very few genetic biomarkers for archaea, and many more for species that derive from bacteria. They also found that the populations of microbes ...

HOUSTON – (Dec. 3, 2012) – Researchers at Rice University have found a way to kill some diseased cells and treat others in the same sample at the same time. The process activated by a pulse of laser light leaves neighboring healthy cells untouched. The unique use for tunable plasmonic nanobubbles developed in the Rice lab of Dmitri Lapotko shows promise to replace several difficult processes now used to treat cancer patients, among others, with a fast, simple, multifunctional procedure. The research is the focus of a paper published online this week by the American ...

A doctor-patient relationship built on trust and empathy doesn't just put patients at ease – it actually changes the brain's response to stress and increases pain tolerance, according to new findings from a Michigan State University research team. Medical researchers have shown in recent studies that doctors who listen carefully have happier patients with better health outcomes, but the underlying mechanism was unknown, said Issidoros Sarinopoulos, professor of radiology at MSU. "This is the first study that has looked at the patient-centered relationship from a neurobiological ...

Women suffering from sleep apnea have, on the whole, a higher degree of brain damage than men with the disorder, according to a first-of-its-kind study conducted by researchers at the UCLA School of Nursing. The findings are reported in the December issue of the peer-reviewed journal SLEEP. Obstructive sleep apnea is a serious disorder that occurs when a person's breathing is repeatedly interrupted during sleep, sometimes hundreds of times. Each time, the oxygen level in the blood drops, eventually resulting in damage to many cells in the body. If left untreated, it ...

In new research published in a special issue of the journal Environmental Health Perspectives and in "Sources to Seafood: Mercury Pollution in the Marine Environment"— a companion report by the Dartmouth-led Coastal and Marine Mercury Ecosystem Research Collaborative (C-MERC), scientists report that mercury released into the air and then deposited into oceans contaminates seafood commonly eaten by people in the U.S. and globally. Over the past century, mercury pollution in the surface ocean has more than doubled, as a result of past and present human activities such ...

The value that an expectant mother places on family—regardless of the reality of her own family situation—predicts the birthweight of her baby and whether the child will develop asthma symptoms three years later, according to new research from USC. The findings suggest that one's culture is a resource that can provide tangible physical health benefits. "We know that social support has profound health implications; yet, in this case, this is more a story of beliefs than of actual family support," said Cleopatra Abdou, assistant professor at the USC Davis School of Gerontology. Abdou ...

MINNEAPOLIS/ST. PAUL (December 3, 2012) – Researchers at the University of Minnesota's Center for Drug Design have developed a synthetic compound that, in a mouse model, successfully prevents the neurodegeneration associated with Alzheimer's disease. In the pre-clinical study, researchers Robert Vince, Ph.D.; Swati More, Ph.D.; and Ashish Vartak, Ph.D., of the University's Center for Drug Design, found evidence that a lab-made compound known as psi-GSH enables the brain to use its own protective enzyme system, called glyoxalase, against the Alzheimer's disease process. ...

Researchers at Western University have made a breakthrough that could lead to a better understanding of a common form of arthritis that, until now, has eluded scientists. According to The Arthritis Society, the second most common form of arthritis after osteoarthritis is "diffuse idiopathic skeletal hyperostosis" or DISH. It affects between six and 12 percent of North Americans, usually people older than 50. DISH is classified as a form of degenerative arthritis and is characterized by the formation of excessive mineral deposits along the sides of the vertebrae in the ...

GAINESVILLE, Fla. — University of Florida scientists have co-authored a study describing a new Lepidoptera species found in Jamaica's last remaining wilderness. Belonging to the family of skipper butterflies, the new genus and species is the first butterfly discovered in Jamaica since 1995. Scientists hope the native butterfly will encourage conservation of the country's last wilderness where it was discovered: the Cockpit Country. The study appearing in today's Tropical Lepidoptera Research, a bi-annual print journal, underscores the need for further biodiversity research ...

Medicare Advantage (MA), with more than 10 million enrollees, is the largest alternative to traditional Medicare. MA's managed care approach was designed to provide coordinated, integrated care for patients and savings for taxpayers, but since the program launched as Medicare Part C in 1985, critics have said that the system limited enrollee freedom of choice without significant benefit or savings to the Medicare program. They also pointed to the tendency of some private payers to design benefit plans and marketing campaigns that attracted healthier patients, leaving sicker, ...

BALTIMORE, MD (December 3, 2012)— Probiotics like those found in yogurt are not only good for people--they are also good for fish. A new study by scientists at the Institute of Marine and Environmental Technology found that feeding probiotics to baby zebrafish accelerated their development and increased their chances of survival into adulthood. This research could help increase the success of raising rare ornamental fish to adulthood. It also has implications for aquaculture, since accelerating the development of fish larvae--the toughest time for survival--could mean ...

Scientists at the U.S. Department of Energy's (DOE) Ames Laboratory have discovered new ways of using a well-known polymer in organic light emitting diodes (OLEDs), which could eliminate the need for an increasingly problematic and breakable metal-oxide used in screen displays in computers, televisions, and cell phones. The metal-oxide, indium tin oxide (ITO), is a transparent conductor used as the anode for flat screen displays, and has been the standard for decades. Due to indium's limited supply, increasing cost and the increasing demand for its use in screen and lighting ...

Boston, MA -- A new study led by researchers at Harvard School of Public Health (HSPH) has found an association between reductions in fine particulate matter and improved life expectancy in 545 counties in the U.S. from 2000 to 2007. It is the largest study to date to find beneficial effects to public health of continuing to reduce air pollution levels in the U.S. The study appears in the December 3, 2012 online edition of the journal Epidemiology. "Despite the fact that the U.S. population as a whole is exposed to much lower levels of air pollution than 30 years ago—because ...