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Tag: "sides" at biology news

UCSB scientists probe sea floor venting to gain understanding of early life on Earth

...s interested in the large region of cooling on the sides of the mid-ocean ridge. Possibly 90 percent of the...to sample the biosphere below the sea floor." The sides of abyssal hills are fault escarpments (or scarps) created by vertical uplift of the seafloor during...

University of Manchester makes made-to-measure skin and bones a reality using inkjet printers

... these constructionsas they naturally stick to the sides of whatever they are beinginserted into. If they stick to the sides then this limits the numberof cells which can grow into tissues, and the lack of penetration alsolim...

Bound for destruction: Ubiquitination protects against improper Notch signaling

...ncodes a receptor protein that extendsthrough both sides of the cell membrane and which is capable ofinteracting with a ligand partner, such as the protein Delta, presentedon the surface of a neighboring cell. This “juxtracrine?interactioncauses the cleavage of an intracellular region of the Notch protein,...

New Clues Add 40,000 Years to Age of Human Species

...Omo II—were once entombed in sediments on opposite sides of the Omo River in southern Ethiopia. By applying modern radiometric dating techniques and a careful study of sediments and fossils, the researchers linked the Omo hominids, true Homo sapiens, to a single period in time. “Some have considered Omo...

Researchers trace evolution to relatively simple genetic changes

...armor plates. And that puts the plates back on the sides of the fish," Kingsley said. "So, this is one of the first cases in vertebrates where it's been possible to track down the genetic mechanism that controls a dramatic change in skeletal pattern, a change that occurs naturally in the wild," he noted. ...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...armor plates. And that puts the plates back on the sides of the fish," Kingsley said. "So, this is one of the first cases in vertebrates where it's been possible to track down the genetic mechanism that controls a dramatic change in skeletal pattern, a change that occurs naturally in the wild," he noted. ...

Implanted Devices Detect High-Risk Heart Failure Patients

...ns. First, the devices electrically stimulate both sides of the heart in coordinated fashion, which optimizes the contractability of already weakened heart muscle. Second, the defibrillator "shocks" the heart back into normal rhythm whenever the heart beats irregularly. In addition to maintaining the hear...

Brain May Be Less Plastic Than Hoped

...th a laser, creating small blind spots on the same sides of the field of vision. The retina sends signals that the brain interprets as light, color, or objects. Each section of the retina corresponds to a specific location in the primary visual cortex. Without any visual signal to interpret, the cortical a...

An (ecological) origin of species for tropical reef fish

...ic differences within, rather than across, the two sides of the Amazon barrier. Genetically similar fish were found in ecologically similar habitats--even thousands of miles apart. Wrasses collected only 360 km apart along the Brazilian coast were genetically more distinct than were fish collected 4200 km...

A probe, not an echo

... transmitter and receiver, are mounted on opposite sides of a drum that spins as it rises around the object (which is suspended in water), creating a stack of tomographic image slices which visualization algorithms turn into 3D images. In the first set of experiments using the HUTT system, the Marmarelis ...

Pair of cancer genes found to drive both cell migration and division

...like migrating cells - PIP3 levels are high on the sides that represent the 'fronts' of what will be two new cells, and they are low at the furrow, or what amounts to the back of the new cells," says Devreotes. In their experiments, cells without PTEN and PI3K couldn't regulate levels of PIP3, and they di...

New book explains antibiotic resistance for a broad audience

... a real-life context; accounts of positions on all sides of the public policy debate are presented; and less common issues such as what happens to antibiotics once they are released into the environment, are addressed. "Every other book on antibiotics and antibiotic resistance that has stressed the scient...

Searching the depths of the straits of Florida for disease cures

...ged with a few small islands and surrounded on all sides by the deep Straits of Florida and the swiftly flowing Florida Current, which joins with the Antilles Current to form the Gulf Stream off Central Florida. Besides the Cay Sal Bank, the expedition will also include several days of submersible explorat...

Vitamin A's paradoxical role in influencing symmetry during embryonic development revealed

...depending on whether they are on the left or right sides of the embryo. The action of retinoic acid makes sure that some of those cells ignore the left-right instructions and progress symmetrically. Belmonte compares the node to a doorway. "Before embryonic stem cells enter the node, they don't have an or...

Researchers identify new catfish family

... very narrow cranium and the muscles anchor to the sides of the bone instead of coming up on top. That and a number of other characters clearly indicate it has nothing to do with ictalurids." The animal and plant life of Mesoamerica is exceptionally diverse with distinct origins from North America, South ...

Neurologix announces positive results of gene therapy clinical trial in Parkinson's disease

...nique opportunity to compare treated and untreated sides of the brain. In essence, the untreated side acted as a control. The combined clinical and imaging data provide powerful evidence that this treatment appears to be efficacious, as well as safe, at the current dose levels." This Phase I trial is th...

Gene loss accelerates aging

...d a shortened lifespan. "Aging and cancer are two sides of the same coin. In one case, cells stop dividing and in the other, they can't stop dividing. We suspect that having the right amount of the p63 protein in the right cells at the right time creates a balance that enables organisms to live relatively...

Columbia scientists develop cancer terminator viruses

...n breast tumor xenografts were established on both sides of immune-deficient mice. Results found that treating the tumors on just one side of the animal with very few injections of this modified virus not only cured the injected tumors, but also resulted in the destruction of the tumors on the opposite si...

Female butterflies go for sparkle -- not size -- when choosing to mate

...ly controlled tests on both the dorsal and ventral sides of wings, Robertson induced a dozen subtle variations in the eyespot size and pattern of males and then studied how they influenced female's mating decisions. "It's very easy to change the size, color composition and shape of these patterns, using a...

Regenerating worms help elucidate stem cell biology

...inning to regress, followed by a curling up of the sides of the body. Not surprisingly, worms without neoblasts also lose their ability to regenerate. With their unparalleled capacity for regeneration and the many environmental cues that influence the division and differentiation of their neoblasts, Sánc...

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