Pitt, NETL researchers report molecular chain reaction thought to be impossible
PITTSBURGHPeople said it couldn't be done, but researchers from the University of Pittsburgh and the U.S. Department of Energy National Energy Technology Laboratory (NETL) in Pittsburgh demonstrated a molecular chain reaction on a metal surface, a nanoscale process with sizable potential in areas ...
Food for thought -- regulating energy supply to the brain during fasting
LA JOLLA, CAIf the current financial climate has taught us anything, it's that a system where over-borrowing goes unchecked eventually ends in disaster. It turns out this rule applies as much to our bodies as it does to economics. Instead of cash, our body deals in energy borrowed from muscle and ...
Baiji Dolphin previously thought extinct spotted in the Yangtze River
BEIJING-- The reported sighting of a Yangtze River dolphin, or Baiji, means there is still a chance for people to take further action and protect the cetaceans in the Yangtze from extinction, according to World Wildlife Fund.
The Chinese media reported that a local businessman in Tongling City ...
Bioethanol's impact on water supply 3 times higher than once thought
At a time when water supplies are scarce in many areas of the United States, scientists in Minnesota are reporting that production of bioethanol often regarded as the clean-burning energy source of the future may consume up to three times more water than previously thought. Their study appeared ...
New research shows dinosaurs may have been smaller than we thought
FAIRFAX, Va., June 24, 2009 For millions of years, dinosaurs have been considered the largest creatures ever to walk on land. While they still maintain this status, a new study suggests that some dinosaurs may actually have weighed as little as half as much as previously thought.
In the stud...
Nations that sow food crops for biofuels may reap less than previously thought
MADISON -- Global yields of most biofuels crops, including corn, rapeseed and wheat, have been overestimated by 100 to 150 percent or more, suggesting many countries need to reset their expectations of agricultural biofuels to a more realistic level.
That's according to a study led by Matt John...
Whispering bats are 100 times louder than previously thought
Annemarie Surlykke from the University of Southern Denmark is fascinated by echolocation. She really wants to know how it works. Surlykke equates the ultrasound cries that bats use for echolocation with the beam of light from a torch: you won't see much with the light from a small bulb but you cou...
Ocean growing more acidic faster than once thought
University of Chicago scientists have documented that the ocean is growing more acidic faster than previously thought. In addition, they have found that the increasing acidity correlates with increasing levels of atmospheric carbon dioxide, according to a paper published online by the Proceedings...
Ancient marine invertebrate diversity less explosive than thought
Diversity among the ancestors of such marine creatures as clams, sand dollars and lobsters showed only a modest rise beginning 144 million years ago with no clear trend afterwards, according to an international team of researchers. This contradicts previous work showing dramatic increases beginnin...
Britain's last Neanderthals were more sophisticated than we thought
An archaeological excavation at a site near Pulborough, West Sussex, has thrown remarkable new light on the life of northern Europe's last Neanderthals. It provides a snapshot of a thriving, developing population rather than communities on the verge of extinction.
"The tools we've found at the...
Shell-breaking crabs lived 20 million years earlier than thought
While waiting for colleagues at a small natural history museum in the state of Chiapas, Mexico last year, Cornell paleontologist Greg Dietl chanced upon a discovery that has helped rewrite
the evolutionary history of crabs and the shelled mollusks upon which they preyed.
In a museum display ca...
Food for thought
Millions of people tend bird feeders in their backyards each year, often out of a desire to help the animals. But a new survey of research on the topic finds that feeding may not always bring a positive outcome for the birds.
Published as a Frontiers in Ecology and the Environment e-View pap...
Toll of climate change on world food supply could be worse than thought
Global agriculture, already predicted to be stressed by climate change in coming decades, could go into steep, unanticipated declines in some regions due to complications that scientists have so far inadequately considered, say three new scientific reports. The authors say that progressive changes...
Gene thought to assist chemo may help cancer thrive
A gene thought
to be essential in helping chemotherapy kill cancer cells, may actually help them thrive. In a new study of chemo patients, scientists at the Georgia Institute of Technology and the Ovarian Cancer Institute found that 70 percent of subjects whose tumors had mutations in the gene p53 ...
‘Blue Brain?project explores thought at molecular level
Beijing Genomics Institute (BGI) of the Chinese Academy of Sciences (CAS) and the Danish Committee of Pig Breeding and Production (DCPBP) jointly announce the public release of pig genomic sequences. The released sequence data include 3.84 million pieces of the genomes of five different domestic pi...
Chronic Sinus Infection Thought To Be Tissue Issue, Mayo Clinic Scientists Show It's Snot
Mayo Clinic researchers have found that the cause of chronic sinus infections lies in the nasal mucus -- the snot -- not in the nasal and sinus tissue targeted by standard treatment. The findings will be published in the August issue of Journal of Allergy and Clinical Immunology and are available ...
AGU journal highlights -- Aug. 6, 2009
...t conditions favorable for flowing water and lake formation may have existed for thousands of years on Mars during the Hesperian epoch, which has been thought
to be a period during which surface conditions did not allow significant hydrological activity. The authors suggest that the sedimentary deposits asso...
New stem cell research could reduce number of animal experiments
...nd eventually causing death.
Dr Subramanian will be making iPS cells from the skin cells of patients suffering from ALS to study the genes that are thought
to cause the disease.
She said: "These are exciting times for stem cell research and there is tremendous potential in the iPS cell technology both ...
The way you eat may affect your risk for breast cancer
...ng wisdom is that the degree of protection from calorie restriction is proportional to the degree of mammary tumor prevention. Second, they originally thought
that intermittent calorie restriction might enhance tumor growth due to growth factors being secreted in response to re-feeding, Cleary said.
Protecting cells from their neighbors
...cribed a phenotype named pole hole. Embryos, that did not survive, showed a cavity in one of the poles of the egg in which cells were lacking. "It was thought
that this was a problem related to the germ line but the cause was unknown. We now know that in the absence of the protective mechanism somatic cells ...
Stem cell 'daughters' lead to breast cancer
...e international journal Nature Medicine , represents a major shift in the way scientists think breast cancer develops.
Dr Visvader said it had been thought
in recent years that breast stem cells gave rise to BRCA1 tumours. "However, research carried out at the institute by Drs Elgene Lim and Franois Vaill...
August 2009 Geology and GSA Today media highlights
...ng of massive continental ice sheets while low-latitude Pangean sedimentary sequences recorded multiple 100-m eustatic fluctuations. This cyclicity is thought
to have been driven by changes in Earth's orbit with relation to the sun. Horton and Poulsen employ a coupled ice sheet-atmospheric general circulatio...
Iron isotopes as a tool in oceanography
...es in sediment pore fluids may be a unique tracer of sediment respiration by dissimilatory iron-reducing bacteria.
Dissimilatory iron reduction is thought
to be one of the earliest metabolic pathways on Earth , thus sedimentary iron isotopes may also be useful in reconstructing past iron cycling in the a...
Study links virus to some cases of common skin cancer
...rs mainly in the elderly and people with a suppressed immune system. The people in the new study all had a healthy immune system.
"Originally it was thought
that this virus caused only this rare skin cancer, but our findings indicate that it is a lot more prevalent than we initially thought."
To learn if...
Bizarre walking bat has ancient heritage
...r woodrose, a parasitic plant that produces nectar from blooms near ground level at the base of tree trunks.
Among other unusual traits, the bat is thought
to use its teeth and claws to excavate roosting burrows and males appear to compete for mates by gathering for singing competitions in their breeding ...
Disease threat may change how frogs mate
...their Major Histocompatibility Complex (MHC) type; a group of genes directly involved with the animal's immune system. As the common frog is generally thought
to mate randomly, this is a major shift in the frogs' mating behaviour.
Active mate choice based on MHC type is not uncommon in other species, with...
New supercomputer to reel in answers to some of Earth's problems
...Erich Vorpagel, who manages all research projects on Chinook at EMSL.
Chinook has 4620 Quad-core processors built into 2310 nodes. Each node can be thought
of as the equivalent of four personal computers. But Chinook's nodes are more like supercharged PCs: the Quad-cores give each node the equivalent of e...
Scientists track impact of DNA damage in the developing brain
...ed on Xrcc1, a protein long recognized as the master regulator of a pathway essential for single-strand DNA repair in the nervous system. The brain is thought
to be particularly susceptible to such damage because neurons consume large amounts of oxygen, which can result in excessive production of free radica...
Common allergy drug reduces obesity and diabetes in mice
... white blood cell called a regulatory T cell, once thought
to manage only other white blood cells, also acts ...s is very important, because Tregs had always been thought
to control other T cells and that's it," says Mark...e adds, half joking, "As an immunologist, I always thought
that type 2 diabetes was a pretty boring condition...
Ants more rational than humans
...minimizing the chances for individuals to make mistakes. A "wisdom of crowds" approach emerges, Pratt believes.
"Rationality in this case should be thought
of as meaning that a decision-maker, who is trying to maximize something, should simply be consistent in its preferences." Pratt says. "For animals tr...
Red List overlooks island species
...g to the size of the island itself, "and are often found at lower concentrations than similar continental species, without this meaning they should be thought
to be threatened", adds Martn Esquivel.
According to the International Union for the Conservation of Nature (IUCN), any species with a distributi...
New discovery suggests trees evolved camouflage defense against long extinct predator
.... This species goes through several strange colour transitions during the process from germination to maturity and the reason for these changes is now thought
to be a defence strategy from an extinct predator, the moa.
Before the arrival of humans New Zealand had no native land mammals, but was home to m...
A genetic basis for schizophrenia
... Chicago, Illinois, July 21, 2009 Schizophrenia is a severely debilitating psychiatric disease that is thought
to have its roots in the development of the nervous system; however, major breakthroughs linking its genetics to diagnosis, prognosis and treatment ar...
Wolf reintroduction proposed in Scottish Highland test case
...ially the same animal as elk in the United States have not faced predation or fear such as that for 250 years. Deer densities in that country are now thought
to be so high they are close to the food-limiting carrying capacity of the land, and have serious consequences on native Scots pine and birch regenera...
Early initiation of Arctic sea-ice formation
... Significant sea ice formation occurred in the Arctic earlier than previously thought
is the conclusion of a study published this week in Nature . "The results are also especially exciting because they suggest that sea ice formed in th...
Study explains potential failure of oral contraceptives with obese women
...ity and other factors that affect drug absorption, distribution, metabolism and other factors."
Conventional oral contraceptives, Cherala said, are thought
to be relatively "lipophilic," or tend to concentrate in fat tissue. However, the researchers in this study said they were somewhat surprised to find ...
Surviving mass extinction by leading a double life
...he recolonisation of the extinction-susceptible planktonic domain following mass extinctions events, such as the end-Cretaceous event."
It had been thought
that all modern planktic foraminifers were descended from the few lucky survivors of the meteor impact that wiped out the dinosaurs and 65 to 70 per c...
A 'heart healthy' diet and ongoing, moderate physical activity may protect against cognitive decline
...aving two copies of e4 conveys the highest risk for Alzheimer's; having one e4 also raises one's risk. E3 is the most common type. E2, though rare, is thought
to be protective.
Thomas Obisesan, MD, MPH, FAAFP, Chief of the Division of Geriatrics at Howard University Hospital and professor of medicine at H...
Mystery E. coli genes essential for survival of many species
... and studied them to discover their significance.
Professor Palmer said: "Scientists have been studying E. coli genes for many, many years and we thought
we knew pretty much all there was to know we certainly didn't expect to find any more genes that are essential for survival!
"Finding out that the...
22nd Congress of the European College of Neuropsychopharmacology, Sept. 12-16, 2009, Turkey
...den of mental disorders
Our brain creates our life: perception, movement, thought
and emotion, memories, speech and intelligence are features of this extraor...-specific drugs is currently encouraged. So-called hyperselective drugs are thought
to allow the direct targeting of specific sites of relevant neural activity...