Tag: "bony" at biology news

Study examines cause of hearing loss for patients with certain genetic disease

...urrounds the inner ear mechanism and develops into bony tissue] by tumor, intralabyrinthine hemorrhage, and endolymphatic hydrops [recurrent vertigo accompanied by ringing in the ears and deafness]. Since significant audiovestibular dysfunction, including deafness, can occur suddenly in a manner that is...

New genetic data overturn long-held theory of limb development

...xists in some primitive form in a living primitive bony fish, the paddlefish. "We found that the genetic capability seen in tetrapods to build limbs is present in even more primitive fish," said lead author Marcus Davis, PhD, a postdoctoral fellow in Neil Shubins lab at the University of Chicago. Instead ...

Other highlights in the May 16 JNCI

...negative result. "The presence of relatively early bony metastases may be the best predictor to determine whether bisphosphonates provide clinical benefit in men with prostate cancer. But inconsistency across published trials and lack of improvement in length or quality of life using high doses of potent ...

Bony vertebrate evolution: Elephant sharks closer to humans than teleost fish

...ortant outgroup for understanding the evolution of bony vertebrates such as human and teleost fishes. In a new study published online this week in the open access journal PLoS Biology, Byrappa Venkatesh, Sydney Brenner, and colleagues performed survey sequencing (1.4 coverage) of a chimaera, the elephant ...

Paleontologists discover new mammal from Mesozoic Era

...the anvil (incus) and the stirrup (stapes), plus a bony ring for the eardrum (tympanic membrane). The mammal middle ear bones evolved from the bones of the jaw hinge in their reptilian relatives. However, paleontologists long have attempted to understand the evolutionary pathway via which these precurso...

Other highlights in the March 7 JNCI

...own whether other parts of the osteochondromas the bony stalk and the connective tissue were as well. The authors conclude that EXT1 acts as a tumor suppressor gene in the cartilage of nonhereditary osteochondromas. "Our finding that the cartilage cap is the only [tumor] component of osteochondroma rev...

How fish conquered the ocean

... the University of Bergen, Norway have deduced how bony fishes conquered the oceans by duplicating their y..."the fossil record shows that the ancestors of the bony fishes (teleosts) inhabited fresh water environments for at least 150 million years before they ente...

Shoulder ligament a linchpin in the evolution of flight

...ing the interaction of aerodynamic soft tissue and bony forces affecting the shoulder joint. The team began with the pigeon. To better understand how the birds stabilized their wings during flight, they used CAT scans to make a 3D "virtual skeleton" and calculated the forces needed to maintain a gliding ...

Genetic archaeology offers clues to backstory of male pregnancy

...f proteins which perform a variety of functions in bony fish. Through the course of evolution, some genes ...efish and seahorses and in the kidney and liver of bony fish.. "We think it was a new job for an old gene genetic moonlighting, so to speak. At this point...

Neanderthal genome sequencing yields surprising results and opens a new door to future studies

...han only being able to study the limited number of bony remains and associated artifacts that are available in hard to access museum collections and field sites. Plus, the new techniques we have developed will have useful applications across a range of genomics efforts related to DOE's energy and environm...

Scientists crack rhino horn riddle

...ristic shape. The horns of most animals have a bony core covered by a thin sheath of keratin, the same substance as hair and nails. Rhino horns are unique, however, because they are composed entirely of keratin. Scientists had been puzzled by the difference, but the Ohio University study now has revea...

Other highlights in the Oct. 4 Journal of the National Cancer Institute

...P1 was associated with prostate cancer recurrence, bony metastasis, and death. They suggest that assessing AZGP1 expression may help identify patients at high risk for metastatic prostate cancer. Contact: Branwen Morgan, 61 2 9295 8135, b.morgan@garvan.org.au Also in the October 4 JNCI: Pooled...

Ancient birds flew on all-fours

...e, along with classic reptilian features of a long bony tail, claws and teeth. Although scientists immediately noticed feather-like structures on the hind limbs, they were dismissed as insulating body feathers that didn't play a role in the animal's flight. It wasn't until several four-winged dinosaurs i...

Sturgeon's general warning: stable for now, but beware

...ord dates back 100 million years, are covered with bony plates and have a distinctive wedge-shaped snout with sensitive barbels, or tactile whiskers, to detect food in river-bottom sediment. Sutton's research shows that when a shovelnose sturgeon (Scaphirhynchus platorynchus) reaches reproductive age, i...

Early bird caught the fish: Fossils depict aquatic origins of birds 115 million years ago

...water, like a modern duck, and the webbed feet and bony knees are clear signs that Gansus swam. "Webbed f...mbing or landing in trees," Harris said. "The big bony crest that sticks off the knee-end of their lower leg bones are similar to structures seen in loons ...

Diverse sea 'bugs' revealed on landmark Atlantic cruise to census zooplankton

...in Guinness Book of Records as the world's longest bony fish); A possible new species of fish known as the great swallower (genus Pseudoscopelus). The specimen, extremely large and in near perfect condition, is easily distinguished from its sister species by a unique combination of jaw teeth, lateral li...

Smallest Triceratops skull ever found provides clues to dinosaur's growth

...ld be nearly 10 feet tall and 26 feet long, with a bony frill around the head that was as wide as seven fe...aby's skull, along with a few vertebrae, teeth and bony tendons, were discovered by amateur fossil hunter Harley Garbani in 1997 in Montana's Hell Creek For...

University of Leicester announces world first forensic technique

...lti-slice examination with on-site soft tissue and bony reconstruction. The system proved faster then traditional temporary mortuary radiology yielding greater information related to identification, health and safety, autopsy planning and cause of death. Professor Rutty said: "The demonstration of the ab...

Oceans are 70 percent shark free

...es. The average depth of the oceans is 4,000m and bony fishes - relatives of cod - thrive down to around 9,000m depth. Scientists do not know why sharks are absent from the deep but suggest one possible reason could be due to lack of food. They warn their finding has environmental implications. Profe...

UF scientists reveal ancient origin of vertebrate skeleton

...at unites us with reptiles, amphibians, sharks and bony fishes, while the lamprey skeleton was based on quite different proteins," said Martin Cohn, Ph.D., a developmental biologist and associate professor with the UF departments of zoology and anatomy and cell biology. "Knowing that lampreys also use col...

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