Tag: "decline" at biology news
UTSA researchers examine effects of global warming on Antarctic
...y seeing these regional changes and not a systemic decline
in the amount of ice cover, it is still significant in terms of the way the regions are responding and we're finding that it's linked to global change in the atmosphere." The Antarctic trip, the first for both Xie and Cicek is not the last one pl...
The desert is dying
...desert people and their flocks, are in significant decline
in the hyper-arid Eastern Desert of Egypt. In places more than 50% of the mature trees have disappeared between 1965 and 2003, while almost no new trees have been recruited. Despite extreme aridity the main cause of tree mortality seems not to be cl...
Researchers find hepatitis A and hepatitis C attack same protein to block immune defenses
...ainst it. But while better sanitation has driven a decline
in hepatitis A cases in the United States, Lemon said, "It’s a significant risk for many people traveling overseas, because they fail to receive the vaccine." Hepatitis A has also been the cause of large food-borne outbreaks in the U.S. in recent yea...
Global 'sunscreen' has likely thinned, report NASA scientists
...volcanic eruptions in 1982 and 1991, but a gradual decline
since about 1990. By 2005, global aerosols had dro... in the hydrological cycle." Whether the recent decline
in global aerosols will continue is an open question. A major complicating factor is that aerosols a...
Flavanols in cocoa may offer benefits to the brain
...uld lead to new solutions for preventing cognitive decline
and dementia, according to a panel of scientists who presented new data at the annual meeting of the American Association for the Advancement of Science (AAAS). Several studies suggest that consumption of a special cocoa made to be rich in flavanols...
Parasite infection may benefit MS patients
...ntribute to an increase in allergies, holds that a decline
in infectious diseases may play a role in increasing autoimmune disease incidence. The first study examining the relationship between parasite infections and MS in humans suggests that such infections may affect the immune response in a way that alte...
Twenty of world's 162 grouper species threatened with extinction
...ally vulnerable to over-fishing, and the continued decline
of fish populations can threaten food security and livelihoods in source countries. Their pending inclusion on the IUCN Red List of threatened species also reflects the widespread failure to successfully manage fisheries associated with coral reefs. ...
US conservation efforts bring more marine turtles to UK
...t of the University of Exeter. ‘Following a severe decline
as a result of human activity in the first-half of...h-West Scotland, Wales, Devon and Cornwall. The decline
of sea turtles has led to a global protection effort. Measures have included the introduction of tur...
Stem cells engage in dialogue with the cells that regulate their futures
... in a niche gets out of hand, cancer might form. A decline
in cell production might contribute to the frailty of old age. While a few stem-cell niches have been known for a long time, what's been harder to discover are the characteristics of the cells making up these niches and how they make it possible ...
Ocean sampling yields environmental sources of coral symbionts
...al stresses, coral reefs around the world are in a decline
due in large part to coral bleaching—loss of the symbiotic photosynthetic algae that live within corals and provide much of their energy. These symbiotic algae are essential to their host’s survival, but many corals must acquire their symbionts anew ...
Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census
...n't be so fortunate as new discoveries will likely decline
sharply in the early 22nd century." Dodson and co...aid. "But we don't know for certain if there was a decline
within that six-million-year slice of time before the extinction event." Their estimates for total ...
Vaccination with embryonic stem cells prevents lung cancer in mice
...loped autoimmune disease or a showed a significant decline
in adult pluripotent bone marrow stem cells ?both potential adverse responses to the vaccinations. Prof Eaton said: "We think the results from the carcinogen-initiated cancers are probably the most important, as they are closer to the 'real-life' ...
Proteins necessary for brain development found to be critical for long-term memory
...er understanding of, and treatments for, cognitive decline
associated with normal aging and diseases such as Alzheimer's. The findings appear in the early online edition of the Proceedings of the National Academy of Sciences. "This study presents strong evidence that a molecular process fundamental duri...
New technology to speed up research into Huntington's disease
...loped an effective new method of testing cognitive decline
in mice with the disease, using an automated touch...0,000 people. It is characterised by a progressive decline
in cognitive functioning (including memory loss, intellectual decline
and disorientation) together w...
Small, smaller, smallest -- The plight of the vaquita
...e a probability of only 11% of detecting a 3%/year decline
and a 16% probability of detecting a 10%/year decl...cceptable probability (e.g. 95%) of detecting a 3% decline
would require annual surveys over a period of 39 years at a cost of approximately $29 million. Moreo...
Antibody extends life of mice with breast cancer
...burden significantly, reflected by both a dramatic decline
in the overall incidence of spontaneous metastasis to the lung -- 88 percent to 47 percent -- and fewer macroscopic metastatic lesions." The research group currently is determining if JAA-F11 could increase the effectiveness of existing cance...
Rising ocean temperatures, pollution have oysters in hot water
...s. Today, with the oyster population continuing to decline
from poor water quality and disease, it would take a year to filter the same amount of water, she said. In addition to filtering water, oysters create a kind of reef that other marine life depends upon. "Studies have shown that there are more than...
Climate change creates dramatic decline in red-winged black bird population
...uddenly becomes the pest. So, is the 50 percent decline
in population a good thing for the environment? Weatherhead says that what will happen in the future isn't clear, but if the climate trends continue, there are likely to be further changes in population size. In 2005, Weatherhead returned to th...
Did 'ABCs' cause Uganda's fall in HIV rates?
...redited as being responsible for Uganda's dramatic decline
in HIV rates. A provocative debate in PLoS Medicine considers the two sides to the question of whether the ABCs are helpful or harmful in the battle to control the HIV pandemic. Elaine Murphy and Margaret Green (George Washington University School ...
New research shows big improvement in survival after stroke
...and The University of Auckland, has revealed a 40% decline
in the number of deaths after stroke in the total ...ver, research into stroke rates has shown a steady decline
in stroke in many industrialised countries over recent decades, most notably in Caucasian population...
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