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Tag: "arms" at biology news

UF scientists discover evolutionary origin of fins, limbs

...ith two left feet. We have genes that instruct our arms and legs to grow in the right places and point in ...des of the body where the fins that preceded human arms and legs sprouted, but at the midline that runs along the backbone and belly. This midline -- thi...

Stanford snake venom study shows that certain cells may eliminate poison

... with venom and their prey "a kind of evolutionary arms race." He and Metz suspect that, given the broad range of venoms that have been developed by snakes and other creatures, mast cells probably won't perform as well against every type of venom. "We expect that there will be some snake venoms that eit...

In-home sensors spot dementia signs in elderly

...ng clinical changes that are difficult to get your arms around in the typically designed practice we have nowadays," said ORCATECH's director, Jeffrey Kaye, M.D., OHSU professor of neurology and biomedical engineering. ...

Brittlestar provides new model for stem cell research

...e relative of the starfish and can regenerate lost arms in a matter of weeks. Sam Dupont and Mike Thorndyke are presenting their latest work on Friday 7th April at the Annual Meeting for the Society for Experimental Biology [session A8]. "What is really amazing is that the nervous system starts to be fun...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

... cousin. It had three fingers; T. rex had two. Its arms were longer and more delicate, its head smaller and its agility superior to the car-crushing, restroom-ripping monster of "Jurassic Park" movie fame. While the sex of the two T. rex cousins was impossible to ascertain, Erickson determined their resp...

How the octopus forms an elbow

...ents. Researchers have now illuminated how octopus arms are able to form joint-like structures, and how th...ple, jointed vertebrate arms) and flexible octopus arms suggests that these qualities have evolved convergently in octopuses and in vertebrates, and it also...

New possibilities to fight pests with biological means

...-producing as well as unmodified plants in the six arms of the olfactometer. When the predatory wasps were set free in the central cylinder of the olfactometer, they flew towards the scent-producing plants. The experiments led to an additional, surprising result: in order to react this way, the wasps need...

Animals can change genes quickly to keep up with viral ingenuity

...sive job of keeping up in the ongoing evolutionary arms race between viruses and their hosts. Studying a s... fly's genome. This is relevant for the virus-host arms race because RNAi pathways--which exist in both plants and animals--participate in molecular defense...

Both alcoholism and chronic smoking can damage the brain's prefrontal cortex

...w device for soldiers and potentially others whose arms were amputated. "Imagine an artificial arm that m...d the world, are setting out to achieve. ?People's arms and hands are not only tools, but also an important means by which they explore the world and intera...

University of Utah to help build bionic arm

...w device for soldiers and potentially others whose arms were amputated. "Imagine an artificial arm that m...d the world, are setting out to achieve. ?People's arms and hands are not only tools, but also an important means by which they explore the world and intera...

New study explores beetle species with two forms of females

... for males and females. "The male versus female arms race (involving physical structures, behaviors, chemicals, etc.) for control over mating may take place over evolutionary time, which in theory can lead to the formation of a new species," explain the authors. Examining species of diving beetles th...

MicroRNA may have fail-safe role in limb development

A tiny strand of molecules plays a role in how our arms and legs develop and grow - a finding that sheds light on perplexing bits of material once dismissed as genetic "junk," say scientists at the University of Florida and Harvard University. The research, available today in the online edition of Nature...

Plant defenses prompt bacterial countermeasure in the form of 'island' DNA excision

...searchers have essentially caught one step of this arms race in action, and they have shed light on the molecular mechanisms employed by a bacterial pathogen to survive in the face of its host plant's defenses. The research is reported by John Mansfield and colleagues at Imperial College London, the Unive...

Scientists learn to predict protein-stabilizing ability of small molecules

...s?using hand and foot controls. One of the robotic arms holds a tiny video camera, one works as a retractor and the other two replicate the surgeon’s exact hand movements. The camera and instruments are inserted through small keyhole incisions in the patient’s abdomen. The surgeon then directs the robotic...

Penn Surgeons Use Completely Robotic Surgery to Successfully Treat Prostate Cancer

...s?using hand and foot controls. One of the robotic arms holds a tiny video camera, one works as a retractor and the other two replicate the surgeon’s exact hand movements. The camera and instruments are inserted through small keyhole incisions in the patient’s abdomen. The surgeon then directs the robotic...

DNA self-assembly used to mass-produce patterned nanostructures

...icky ends at the end of each of the 16 tiles' four arms (a total of 128 sequences) that would bind a tile only with its intended neighbor and not with any other tiles or itself. "It turns out there are a lot of combinations to consider," Dwyer said. "That meant running a lot of searches. We had to run th...

Scientists discover the molecular switch for nerve cells' insulating jelly rolls

...xons of nerve cells. Axons are the long cable-like arms of nerve cells that send messages to other cells. The construction of myelin sheath has been called one of the most beautiful examples of cell specialization in nature. Myelin forms the so-called white matter in the nervous system and constitutes 50...

U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming

...th researchers saw sea lilies using their feathery arms to crawl, dragging their stalks behind them, but the scientists wondered what induced sea lilies to relocate in nature. Physical disturbance, overcrowding or predation all were possible factors, but compelling evidence for any of these explanations w...

Creeping crinoids! Sea lilies crawl to escape predators, new video shows

...th researchers saw sea lilies using their feathery arms to crawl, dragging their stalks behind them, but the scientists wondered what induced sea lilies to relocate in nature. Physical disturbance, overcrowding or predation all were possible factors, but compelling evidence for any of these explanations w...

Biologist Discovers What May Be World’s ‘Pickiest?Mates

...s by, much as humans motions “come here?with their arms and hands “The California fiddler crabs use a lateral wave that looks much like a human beckoning 'come here??deRivera said. “It also seems to serve as a 'come hither' signal, as a male waves, standing at his burrow entrance, and interested females ...

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