Tufts University Prof. Maria Flytzani-Stephanopoulos named as AAAS Fellow
... high-grade hydrogen for fuel cells. The water-gas shift
reaction, in which carbon monoxide is removed ... show the highest activity for the water-gas shift
reaction. Adding more metal to form nanoparticles ... for alcohol steam reforming, the water-gas shift
reaction, hydrocarbon oxidation and other ...
Tropical rainforest and mountain species may be threatened by global warming
... moved northward, following the gradual northward shift
of their familiar climates. Other studies have ... and South America. This much warming would shift
temperature zones uphill about 600 m (nearly 2000 ... altitudinal ranges that a 600 m (2000 ft) uphill shift
would move these species into territory ...
Enzyme detectives uncover new reactions, products
... National Laboratory to discover a fundamental shift
in an enzyme's function that could help expand ... a remarkable discovery. Instead of producing a shift
in double-bond position, the enzyme modification ... containing two double bonds. "This was a profound shift
in enzyme function," noted Shanklin, who has been ...
Climate change and species distributions
... the contiguous U.S. Together, these changes could shift
lynx habitat northward and decrease the area of ... them from moving further north. The range shift
of oak trees will happen much slower than the shift
for the butterflies, leading to a contracted ...
Climate change causing significant shift in composition of coastal fish communities
... Rhode Island Sound has revealed a long-term shift
in species composition, which scientists ... increased.
"We think there has been a shift
in the food web resulting in more of the ... "It's hard to explain any other way."
in species composition also correlates with the ...
Killer whales, blind bats, discriminating dolphins, mating birds
... will present data for a new species able to shift
the frequency of its birdsong upward to adapt to ... encountering a complex environment were found to shift
the direction and distance of their sonar gaze to ... By adjusting signal design, flying bats could shift
this distance adaptively to their target of ...
How alligators rock and roll
... diaphragm, pelvic, abdominal and rib muscles to shift
their lungs like internal floatation devices: ... the reptiles controls are muscles that help them shift
their lungs backward to dive, forward to surface ... muscles, such as the diaphragmatic muscle, to shift
the position of their lungs. The gases in the ...
New radar satellite technique sheds light on ocean current dynamics
... embedded in the radar signal the Doppler shift
of the electromagnetic waves reflected from the ... contribute to the Doppler shift.
The Doppler shift
occurs due to changing relative velocities, ... goes down as the vehicle recedes away.
is introduced by the relative motion between the ...
Greenhouse ocean may downsize fish
... types of phytoplankton over diatoms. Such a shift
would ripple up the food chain: as diatoms become ... of course, were the biggest, Hutchins said.
away from diatoms towards smaller phytoplankton ...
Temperature was the key driver of the shift
with secondary impacts from the increased carbon ...
Stanford researchers say climate change will significantly increase impending bird extinctions
... to plants and animals, as their habitats slowly shift
to higher elevations, driven by rising ... extinctions are expected.
is the key issue here,'' Sekercioglu said. ''Birds will follow the shift
All plants have certain ...
Scripps research team blocks bacterial communication system to prevent deadly staph infections
... blocks their communication system, preventing the shift
from harmless to virulent, thus allowing the ... are typically easy to kill and non-virulent. The shift
to virulence is dependent on small molecules ... thinking not enough other cells were present to shift
into their virulent mode.
Bacteria use a ...
Large trees declining in Yosemite
... ability to resist insects and pathogens."
Scientists also found a shift
to fire-intolerant trees in some forests that had not experienced fires ... and severe wildfires are possible in Yosemite because of the recent shift
to fire-intolerant trees in unburned areas and warmer climates bring drier ...
Knee injuries may start with strain on the brain, not the muscles
... as training your muscles in preventing ACL knee injuries, and suggests a shift
from performance-based to prevention-based athletic training programs.
... of a dangerous response," he said. It's analogous to how a seasoned stick shift
driver versus a novice learner might both respond to a sudden stall. The ...
The coming of biofuels: Study shows reducing gasoline emissions will benefit human health
... biofuels as an alternative to gasoline are coming. While the focus of a shift
from gasoline to biofuels has been on global warming, such a shift
could also impact human health. A grant from the Energy Biosciences ...
A biological basis for the 8-hour workday?
... to cry around those times and you're more likely to cry with them." The shift
in gene expression controlled by these harmonics can help an animal prepare for the behavioral and physiological changes that accompany the shift
from light to dark and back.
"We have less of a handle on the 8-hour ...
Fighting global warming offers growth and development opportunities
... at Australian National University.
A forestry study shows that a shift
in production from cold adapted coniferous species such as Norway Spruce ... is approximately 1.6 million km2. Applying a model that predicts the shift
of 32 major tree species in this area reveals that under a scenario with ...
CSHL scientists clarify editing error underlying genetic neurodegenerative disease
... despite the apparent mismatch.
Atypical sites are recognized due to a shift
This raises the question: how does U1 manage to ... that is, in the conventional way the scientists have found that U1 can shift
itself down to the next base in the intron's RNA sequence if this new ...
Climate change's impact on invasive plants in Western US may create restoration opportunities
... future climate conditions.
"Just as native species are expected to shift
in range and relative competiveness with climate change," the authors ... to Bradley and her co-authors, the impacts of climate change will likely shift
spotted knapweed, currently distributed throughout the foothills of the ...
Effects of climate change vary greatly across plant families
... "However, there is wide variation among plant families. Some have shown no shift
in flowering at all, while others now bloom 16 to 20 days earlier in the ... can adjust their growth patterns in several ways. For example, forests shift
toward the poles, alpine tree lines move up mountains to higher altitudes, ...
Decline in Alaskan sea otters affects bald eagles' diet
... of California at Santa Cruz. "The otter decline has caused a phase shift
in the coastal ecosystem from a kelp dominated phase state to a deforested phase state."
means many fewer kelp forest fish for the eagles to eat. In response, the ...
Researchers find animal with ability to survive climate change
One of the main predicted effects of climate change is a forced shift
in species' distribution range.
The study leader, Dr Jim Provan, from ... in contrast to previous studies, suggest that the species has been able to shift
its distribution range in response to previous changes in the Earth's ...
How plants fine tune their natural chemical defenses
... Studies discovered that only a few mutations in a key enzyme are enough to shift
the whole output to an entirely new product mixture. Making fewer changes ... a rugged landscape of catalytic activities, where small changes gradually shift
the equilibrium between both phytoalexins and in some cases cause rapid ...
Light receptors in eye play key role in setting biological clock, study shows
... research in this field may eventually help treat the negative effects of shift
work, aging and jet lag.
About 20 to 25 percent of U.S. workers are shift
workers, many of whom have difficulty sleeping during the day when they ...
Rare Antarctic fossils reveal extinction of tundra before full polar climate arrived
... site, from its geology to the fossils themselves, tells us the climate shift
was abrupt, major, and enduring. Its legacy continues to this day," said ... dating of volcanic ashes, and paleoecology to determine the major climate shift
centered ~14 million years ago.
The authors maintain that the dramatic ...
Ultrasonic frogs can tune their ears to different frequencies
... ears to different sound frequencies, much like the tuner on a radio can shift
from one frequency to another. It is the only known example of an animal ... able to tune in to specific sound frequencies at will, Feng said. They can shift
to high frequency and ultrasonic hearing when the low frequency background ...
Biodiversity maps developed by UCSD scientists will help guide conservation measures in East Africa
... moved with changing climates."
Now, as climate change is expected to shift
the balance between habitats in this region, increased farming has ... picture of how ranges and interactions between species are likely to shift
under different climate changes. A plant and an animal may respond ...
Climate change hastens extinction in Madagascar's reptiles and amphibians
... warming forces species to move up tropical mountains as their habitats shift
upward. Christopher Raxworthy, Associate Curator in the Department of ... chameleons, and frogs, and controlling for sampling effort, an average shift
uphill of 19 to 51 meters (62 to 167 feet) was observed over the decade. ...
Pathway found that lets mosquitoes fatten up, slow down for winter
... environments to either impose a dormancy cycle or to prevent their shift
to diapause. Some mosquitoes are reared under short-day conditions, with ... they produce a hormone called juvenile hormone, which implies another shift
in the insulin signaling pathway at the end of diapause that enables this ...
Ozone hole recovery may reshape southern hemisphere climate change
... ozone-depleting gases than it took for them to build up."
The seasonal shift
in large-scale circulation patterns could have repercussions for Australia ... Brazil, Uruguay and Paraguay, said Perlwitz. If ozone recovery induces a shift
away from a positive SAM, Australia could experience warmer and drier ...
Ancient fish bones reveal impacts of global warming beneath the sea
... period, and as a result, herring fishing seasons started later due to a shift
in the timing of herring spawning in the summer months. As a result, the ... Limfjord fisheries provides an example of how historical ecology may help shift
the baseline by revealing the previous existence of a marine ecosystem ...
Climate change predicted to drive trees northward
... tree species concludes that expected climate change this century could shift
their ranges northward by hundreds of kilometers and shrink the ranges by ... If the species were assumed unable to disperse, the average expected range shift
was 320 kilometers, and drastic range reductions of 58 percent were ...
Bee strategy helps servers run more sweetly
... patches occasionally yield much better nectar than others, the seasons shift
and rainy days make nectar collection difficult. So how do the bees manage ... the bees inhabit, Tovey said. The system allows the bees to seamlessly shift
from one nectar source to a more promising nectar source based on ...
Nanobiosym awarded $2 million DTRA contract
... applications. In the coming years, we envision a significant paradigm shift
in healthcare where the ability to diagnose disease is taken out of a ... and even rural villages. said Dr. Goel. This is similar to the paradigm shift
that occurred in the telecom industry when communications and computing ...
Researchers developing device to predict proper light exposure for human health
... rhythm. Then, using light therapy treatment, the team will attempt to shift
each participants circadian phase.
The results of the study will ... most people; international business travelers who suffer from jet lag; and shift
workers who are often active at times opposite the solar day, according to ...
Advances in lung cancer research announced at conference
... "Identifying the highest-risk population for brain metastasis, so that informed therapeutic trials can be undertaken, could enable a paradigmatic shift
in treating these patients."
The study team included researchers from: TGen; the Virginia G. Piper Cancer Center at Scottsdale Healthcare's ...
Stem cell 'daughters' lead to breast cancer
... source of basal-like breast tumours. Their finding, published in today's issue of the 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 ...
August 2009 Geology and GSA Today media highlights
... Optimum (16 to 14 million years ago), considered generally to be the warmest period in Earth's history within the past 25 million years, saw a major shift
in climate from global warming to cooling. This reversal of climatic warming has proven difficult to understand because of the limited range of ...
Sex in the Caribbean: Environmental change drives evolutionary change -- eventually
... from the Smithsonian Tropical Research Institute and Scripps Institution of Oceanography. The fossil record shows that if a species could shift
from clonal to sexual reproduction it survived. Otherwise it was destined for extinction, millions of years later.
Closure of the Isthmus of Panama ...
Study reveals a reprogrammed role for the androgen receptor
... manages to find an alternate growth route. A new study by Dana-Farber Cancer Institute and Ohio State University scientists demonstrates how.
from androgen-dependent to androgen-independent cell growth occurs, in part, because the androgen receptor switches on an entirely different set of ...
Disease threat may change how frogs mate
... 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 research indicating that a number of ...