Sentences with phrase «migration of»

A new study uses ancient DNA to suggest that a massive migration of herders from the east shaped the genomes of most living Europeans — and that these immigrants may have been the source of Proto - Indo - European (PIE), the mysterious ancestral tongue from which the more than 400 Indo - European languages sprang.

The study shows the importance of considering human history when using genetics to study the migration of large carnivores, which, historically, heads of state have given as gifts.

A fundamental question is how signaling pathways are regulated in time and space to facilitate directional migration of cells.

Might the match result, instead, from the migration of the then «northern German» cod to the north - east Arctic, over the intervening centuries, in response to environmental pressures?

The team took extensive steps to rule out the migration of artifacts between layers, for example by refitting together broken stone tools found in the same layer.

This project is part of a coalition of NSF principal investigators to address the problems of big data for migration of public health emergencies.

The researchers found that migration of oxygen ions away from the contact area results in an abrupt change in the oxide lattice structure and an increase of electrical resistance.

Surely assisted migration of these ecosystems would just be a continuation of the care our species has put into them for thousands of years.

«The Ru catalyst precisely distinguishes butadiene and substituted acetylene molecules and new carbon - carbon bonds are formed among a butadiene with two acetylenes just by migration of the terminal hydrogen atoms in butadiene.

It's the mass migration of such holes that creates the large electrical currents responsible for generating the low - frequency magnetic pulses that make their way to detectors on Earth's surface, they say.

Voltage - induced migration of oxygen ions does change the amount of oxidation, triggering strong material responses.

The northern migration of this commercially important species, Johnson says, could be yet another sign of climate change.

[James P. Kossin, Kerry A. Emanuel and Gabriel A. Vecchi, The poleward migration of the location of tropical cyclone maximum intensity] Researchers looked at the global record of tropical cyclones since the 1970s.

These kinds of experiments can be useful in investigating wound - healing processes or the migration of cells in cancer.

Other layers of impermeable rock underneath the fractured area would block migration of the gas, she said.

After injuries of healthy tissues, we would like to accelerate the migration of healthy cells that move to close the wound.

The natural clock that has governed the migration of these birds for centuries now runs a little too fast for the flycatchers to catch up.

They also expressed lower levels of an RNA message that controls the expression of a family of proteins called SOC, known to inhibit the migration of hematopoietic stem cells.

Various models show a family of small planets thrown outwards early in their development, probably by the migration of Neptune.

It's a «very important» and «very thorough» paper, says James Woods, a microbiologist at Midwestern University in Downers Grove,, Illinois, who has studied the migration of RASFs: «The fibroblasts that were active, they are usually thought of as a resident [i.e., nonmobile] cell.

Kees Weijer of the University of Dundee in Scotland, who studies the migration of cells in chick embryos and slime mold, has been waiting for a light sheet microscope since the EMBL group first publicized its advances.

A temporal array of fluorescence images captures the migration of a cell through a microfluidic channel before and after division.

Sure monarchs are master travelers, with the longest - known seasonal migration of any insect.

The researchers say this migration of insects shows that climate change isn't something that's coming — it's already happening.

Researchers from the Pacific Salmon Ecology and Conservation Laboratory at UBC followed the migration of one of B.C.'s largest sockeye populations from Chilko Lake, in British Columbia's Cariboo region, to the ocean.

For all their disagreements, scientists on both sides of the fracking debate agree that it is very unlikely that microfracturing of rock formation itself contributes to the vertical migration of gases.

It both promotes angiogenesis within the tumor and increased the migration of endothelial cells, which form the inner lining of blood vessels.

Should this happen, the H. erectus idea would go down the drain, and we would be looking at a possibility of another, yet unknown, migration of humans out of Africa perhaps as early as 2 million years ago.

And it significantly replaced the local hunter - gatherer genes across Europe with the indelible stamp of steppe DNA, as happened in Britain with the migration of the Bell Beaker people to the island.

«According to these findings, the receptor family which is important for olfaction in recent insects evolved long after the migration of insects from water to land,» Ewald Große - Wilde summarizes.

Instead, it makes an RNA molecule that is present during early in utero brain development and may orchestrate the migration of cells that build the human brain.

In the same way, observing the migration of cancer cells in a 3 - D environment could unlock information on how cancer grows, finds nutrients, and spreads.

A further research project is looking at the migration of gladiators, who often came from different parts of the Roman Empire to Ephesos.

Researchers have uncovered a sieve - like structure in lymph nodes that regulates the transport of proteins and migration of white blood cells into lymph nodes.

«The first thing that needs to happen for wound healing is to activate the migration of epithelial cells,» Oudhoff says.

Recently published in the journal eLife and featured in a poster session at this year's American Association for Cancer Research (AACR) annual meeting, preclinical experiments show for the first time that PLK1 promotes the migration of prostate cancer cells by setting in motion a process that induces what is known as the epithelial - to - mesenchymal transition (EMT).

These seas — U.S. territorial waters in the Chukchi and Beaufort seas — are not currently fished, but sea ice melt and the northward migration of certain fish species, such as salmon, raises the possibility that they would be in the not too distant future.

Satellite capable of following migration of tagged cuckoos may set stage for space station system

The orbits of exocomets on Beta Pictoris could also help scientists trace the presence and migration of larger, undetected bodies such as gas giant planets in the planetary system, says Russel White, an astronomer at Georgia State University in Atlanta who was not involved in the study.

«We showed that PLK1 drives migration of normal prostate epithelial and prostate cancer cells through an entirely different process.»

«It was an exciting thing to stumble upon,» says astronomer and lead author Rok Roškar of the University of Washington, Seattle, who notes that recent observations support the model's conclusion that radial migration of stars might be quite pervasive in the Milky Way.

It appeared to bring the migration of the cancer cells to a halt.

Eventually, some wandered farther east, part of the migration of Aryans on horseback who conquered India about 3,500 years ago.

A group of researchers led by Kosuke Fujita, Visiting Researcher and Akito Maeda, Specially Appointed Professor at the HP Skin Regeneration, PIAS Collaborative Research, Osaka University clarified that cinnamtannin B - 1, or vegetable - based polyphenol, promotes the migration of Mesenchymal Stem Cells (MSCs) in blood circulation and accumulates them in damaged tissues (Fig. 1) to improve wound healing.

The researchers found that PAI - 039 inhibited the migration of cultured human coronary artery smooth muscle cells, and prevented the development of blockages in arteries and bypass grafts in mice.

It is the longest recorded migration of any animal.

In our experiments, we found that when the plating and stripping current density is raised above ~ 9 milliamperes per square centimeter, there is substantial self - heating of the dendrites, which triggers extensive surface migration of Li.

China in particular stands out because of its sudden role as the world's factory, its enormous population, and the mass migration of that population to urban centers; 350 million people, equivalent to the entire U.S. population, will be moving to its cities over the next 10 years.

(The nation's first amphibian tunnel was built in Amherst, Massachusetts, in 1987 to aid the spring migration of the spotted salamander.)

This uphill migration of bands occurs as new vegetation grows upslope of the bands and old vegetation dies on the downslope edge.