Tag: "decline" at biology news
Alzheimer's disease is not accelerated aging
...h more commonly falters with normal aging, and the decline
in long-term memory typical of Alzheimer's. Executive function involves the cognitive processes used to complete complex, goal-oriented tasks. Elderly individuals with no symptoms of dementia may have difficulty attending to one thing when distractio...
Fortifying food with folic acid benefits babies
...ns of food fortification and supplement use to the decline
in neural tube defects. Therefore, the authors stress that, "public education regarding folic acid supplement use by women of childbearing age should continue." There has been some debate about whether an increased intake of folic acid could mask the...
Study explores gene transfer to modify underlying course of Alzheimer's disease
...nt trends toward improvements in rate of cognitive decline
and brain activity noted by Dr. Tuszynski must be interpreted with extreme caution. This study used genetically modified skin cells to deliver the NGF. Results from that study were presented at the American Academy of Neurology meeting in Philadelphi...
Health of world's sea lions the focus of Wakefield Symposium
... world's sea lions, including dozens who study the decline
of Alaska's Steller sea lions, will gather in Anch...isons can shed light on why some populations might decline
while others increase. Insights can also be gained on whether trends in the abundance of sea lions a...
Viral suspect for amphibian decline traced to human spread through bait
...ing or invasive diseases are involved in amphibian decline
-- the ongoing global disappearance of a broad gro...hogens play among a host of possible causes in the decline
of amphibian populations worldwide. Early in the project, the team began to focus on two apparently...
Pneumococcal vaccine reduces ear infections, pneumonia, new study shows
... study provides "the first data that demonstrate a decline
in all pneumococcal-related diseases, not just invasive disease, in children aged younger than 2 years since the introduction of pneumococcal conjugate vaccine in the United States," Poehling and colleagues wrote in the journal....
Fossils reveal direct link between global warming and genetic diversity in wildlife
...y wet grasslands, the scientists expected to see a decline
in the population of both species during the Medie... during the warmer period, along with a 50 percent decline
in the number of pocket gophers. As expected, fossil abundance for both species rose dramatically du...
Long-term effects of carbon monoxide poisoning are an autoimmune reaction
...oisoning. The physiological causes of this delayed decline
were not well understood until now. A team led by Stephen R. Thom, MD, PhD, Professor of Emergency Medicine and Chief of Hyperbaric Medicine, at the University of Pennsylvania School of Medicine, report this week online in the Proceedings of the Nati...
Computer models expose humans as main cause of caribou decline
...riable most responsible for the woodland caribou's decline
in northern Alberta. The models also showed that woodland caribou could coexist with uncontrolled wolf populations in northern Alberta, but if human developments continue at the current rate, the number of woodland caribou in the area will drop sharp...
Men from early middle ages were nearly as tall as modern people
...(167 cm) during the 17th and 18th centuries. "This decline
of two-and-a-half inches substantially exceeds any height fluctuations seen during the various industrial revolutions of the 19th century," Steckel said. Reasons for such tall heights during the early Middle Ages may have to do with climate. Steckel ...
Highlights of American Chemical Society national meeting in Philadelphia, Aug. 22-26
...rt's Peak: The Impending World Oil Shortage," this decline
could spur a global economic crisis, the likes of which the world has never seen. Deffeyes now claims that the current spike in energy prices may just be the leading edge of this crisis. His presentation is part of a daylong Presidential symposium, "...
Regular physical activity really does boost immune system in older men
... or cycling may offset some of the immune function decline
in healthy older people. However most earlier stud...ans." The study found that there is an age-related decline
in the primary antibody response to the novel antigen KLH as well as an age-related decline
in the m...
Restoring sweetgrass to the South Carolina lowcountry
.... "Fire suppression may have played a part in the decline
of sweetgrass habitat, but residential development is the major cause," says Burke. "The coastal savannah habitat has disappeared from much of this land, and areas where sweetgrass still grows cannot be accessed because of private property restrictio...
Muscling their way into the food chain: Zebra mussels alter fish populations in the Hudson River
...en zebra mussels abound, open-water food resources decline
and shoreline food resources increase. This explains the population shifts Strayer and colleagues observed, with open-water species moving downriver, away from the invasion, and shoreline species moving upriver. This has been the first study to lin...
'Smart gene therapy' protects against damage from heart attack
...als. Skeletal muscle and liver exhibited a similar decline
in injury following the gene therapy treatment. In addition, one month later the untreated animals exhibited severe thinning of the heart wall and reduced heart function compared to those that received the gene therapy. After four months, the untreat...
Wolf reintroduction reshapes Yellowstone ecology
...ost likely the overriding cause of the precipitous decline
and cessation in the recruitment of aspen, cottonwood and willow across the nothern range." The new theory thus brings a significant new factor into long-running, intense debates over the proper management of Yellowstone. Ripple and Beschta conclud...
A changing landscape may have dire implications for birds
...he woods, Americans may very well be hastening the decline
of many native bird species that breed in forest h...g pressure on forest ecosystems, and the resulting decline
in native vegetation and the increase in human activity - ranging from all-terrain vehicle use to pr...
New framework for biodiversity conservation
...a around the globe. Wanting to reverse the rapid decline
of species, both public and private conservation groups from the Park Service to The Nature Conservancy face a constant dilemma of when, where, and how to invest limited funds to maximize conservation benefits. In attempts to have a scientific fou...
Why some neonates need caffeine
...vity is typically assessed by monitoring the rapid decline
in minute ventilation (in the first minute) after inhalation of pure O2 . This drop in ventilation involves an acute reduction in peripheral chemoreceptor inputs (i.e., physiological chemodenervation) and thus reflects the strength of the peripheral ...
Long-term heart damage may result from constant confrontation and defeat
...ny animal studies indicate that there is a gradual decline
in stress when the stress factor, such as changes in habitation, is repeatedly applied. In other words, the body adapts so there is less stress. However, it was shown recently that rats intermittently exposed to an uncontrollable social stresso...
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