Tag: "back" at biology news
Scientists propose new approach to estimating global ocean productivity
...the reflection of light off particles in the water back
to space, is particularly useful. Two Maine scientists, Collin Roesler of the Bigelow Laboratory of Ocean Sciences and Mary Jane Perry of UMaine, developed a method to obtain backscattering from ocean color in the mid-1990s. "There is a big leap of ...
Tree-ring data reveals multiyear droughts unlike any in recent memory
...e first to establish Columbia River flow estimates back
250 years, says lead author Ze'ev Gedalof of the U... Ontario. Reliable natural-runoff estimates extend back
only about 75 years, he says. Of the six major multiyear droughts researchers detected in the Columb...
Intervention cuts nerve damage, boosts life span
...is sufficiently established, protons begin to flow back
across the membrane through a special enzyme that ...UCP2, they report. That life span extension traced back
to an increase in mitochrondrial uncoupling in the neuron-rich flies' heads, which led to a decline ...
Computer-aided protein design wins prestigious AAAS Newcomb Cleveland Prize
...inal plan. Their automated design procedure cycles back
and forth between assembling the linear protein chain and predicting the three-dimensional structure that would arise from it. Throughout the year, Science readers may nominate papers appearing in the journal's research articles, reports, or reviews ...
Are IVF embryos starved of a vital ingredient?
...hers, who say preliminary studies of human embryos back
their claims. Although the latest review of IVF safety found no differences between 8-year-olds conceived normally and those conceived by IVF or ICSI, the possibility of long-term health effects still cannot be ruled out. There are certainly differe...
The oldest Homo sapiens
...oamed Africa about 195,000 years ago. "It pushes back
the beginning of anatomically modern humans," says...nce of Homo sapiens from about 160,000 years ago back
to about 195,000 years ago "is significant because the cultural aspects of humanity in most cases ap...
Discovery offers cancer prevention, diagnosis, treatment hopes
...of cell to become cancerous, it must first revert back
to stem-cell stage. "In other words," he said, "it has to turn back
time. "So what we found is that the human adult stem cell in which the oct-4 gene was expressed was ...
Map of human genetic variation across populations may promise improved disease treatments
...s are found across all populations and likely date back
to the exodus of modern humans out of Africa. But,...on, noting that biomedical researchers must "climb back
on the tightrope to address racial disparities in health" to avoid "reification" or reinforcement of...
Scientists discover how climate change causes the simultaneous boom or bust of multiple populations
...rouse that hunters annually harvested since as far back
as 1840. The records provide a gauge of the abundance of each of the 100 independently managed populations for each year. Using this technique, Husdon's team was able to identify the specific years in which the grouse populations were all pushed i...
Molecular machine may lead to new drugs to combat human diseases
...ons for gene behavior. Introns then splice the RNA back
together. Scientists are just learning whether many DNA sequences previously believed to have no function actually may play specialized roles in cell behavior. While humans have introns, they don't have Group I introns. Many pathogens that cause hum...
Were bigger brains really smarter?
...inally did, the results were spectacular. Starting back
about 75,000 to 50,000 years ago in Africa, there was a burst of creativity. Necklaces and pendants appear first, then figurines. By 35,000 years ago, there were paintings on the walls of European caves, complete with perspective. "This creativity pr...
Scientists will discuss remarkable advances in whale research at the annual meeting of AAAS
...y well, for various reasons, so the tree collapses back
down again.'' The same holds true for whale genealogies, he adds. ''We're able to read back
in time and see how the population changes. We're hoping to see if, as the ice ages come and go, whe...
The secret lives of whales
...trate over a million years of whale history dating back
to the middle of the last series of Ice Ages. Usi...ng huge whale carcasses and recycling their bodies back
into oceanic lifecycles. If we want to understand the nature of life what evolution can dowe must u...
Technological revolutions in sensors, robotics, and telecommunications allow new views of ocean
...s to stay in the water and "plug in" sending data back
to shore in real time without being connected to the surface. Scientists and engineers hope that this new technology will allow us to wire the entire ocean basins in the future. "It's hard to understand how important it is until you compare it with ...
New science sheds light on rebuilding fisheries
...ions to exceedingly low levels and they can bounce back
rapidly," says Hutchings. "Not to say that it can't happen. But little or no recovery appears to be the general pattern. Unfortunately, it appears to be the exception that drives policy." Genetic and ecological studies led by Ralph Larson of San Fr...
Successful test of single molecule switch opens the door to biomolecular electronics
...state where more electrons are removed and turn it back
into an insulator. Measuring the connected molecul...t from an insulator to a strong conductor and then back
into an insulator again. Given the measured electrical properties of the oligoaniline, Lindsay notes...
Restoring the marshes of Eden
...birds are there, what kinds of new birds have come back
into the reflooded areas." Dr. Warner says that a group of Iraqi scientists and students will be coming to work and study at the University of Waterloo this summer. "Again, we want to try and reacquaint them with the modern world," he says. ...
New Georgia Tech micro-CT imaging technique to help tissue engineers improve bone regeneration
...h into vascular injuries, disc degeneration in the back
and help detect tumors early by pinpointing areas of increased vascularization (which often indicate tumor growth)....
Bird IQ test takes flight
How smart is your parakeet or that crow in the back
yard? Ask Dr. Louis Lefebvre, inventor of the world's only comprehensive avian IQ index. His intelligence index is not only separating the featherweights from the big bird brains, it's also providing clues about why some birds make great immigrants, ...
The secret to longevity in tubeworms
...L. luymesi also uses its roots to release sulfate back
to the microbial consortia from which it draws its sulfide. Without this return of sulfate, the model predicts an average lifespan of only 39 years in a colony of 1,000 individuals; with it, survival increases to over 250 years, matching the longevit...
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