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Tag: "networks" at biology news

Spousal illness can trigger partner death

...es yet another important connection between social networks and health," says Richard M. Suzman, PhD, associat..."We don't yet know the full extent to which social networks affect health. We need to explore the mechanisms behind the stresses associated with these hospitali...

In the mind's eye: How the brain makes a whole out of parts

...Such experiments are beginning to reveal how large networks of neurons in the brain extract meaning from the eye image." ...

Ahead of the game

...ng practices. "The establishment of larger social networks allowed the replacement of Neanderthals in the Caucasus," write the authors. "Our study also indicates that this process of replacement by modern humans spread beyond the traditional biogeographical barrier [of] Neanderthal mobility represented by th...

Bioengineers create stable networks of blood vessels

...ailed microscopic studies showed that the vascular networks were stable as implants for up to six weeks and were able to connect with larger blood vessel structures. "This expands our understanding of the neuro-vascular niche and opens up ways to address repair of severed nerves," said Joseph Madri professo...

Yale scientists decipher 'wiring pattern' of cell signaling networks

...s team constructed a complex map of the regulatory networks governing the functions and activities of the kina... into the regulation and integration of biological networks has broad applications for basic science and clinical research," said Snyder. "Biological networks d...

Researchers develop new method to help find deadly malaria parasite's Achilles heel

... interactions may be erroneous. "All the protein networks described so far are incomplete and statistically noisy," said Ideker. "But whether they are incomplete and noisy in the same way or not, we can say with confidence that this particular stage of Plasmodium is different from the other organisms we've ...

How the neuron sprouts its branches

...iving stations by which neurons form the signaling networks that constitute the brain's circuitry. Such basic insights into neuronal growth will help researchers better understand brain development in children, as well as aid efforts to restore neuronal connections lost to injury, stroke or neurodegenerative...

Researchers discover new form of cancer gene regulation

...wn as pattern formation, are controlled largely by networks of genes and proteins called signal transduction pathways that receive signals from outside of the cell in the form of protein interaction with the cell surface. Through a series of intracellular events, these signals trigger gene activation or repre...

How E. coli bacterium generates simplicity from complexity

... the complexity of individual parts of biochemical networks in E. coli and other model organisms, but our larg...e-scale reconstruction of regulatory and metabolic networks involving hundreds of these parts has shown that all this genetic complexity yields surprisingly few...

MIT researcher presents new view of how the cortex forms

...ith other brain regions, develop unique processing networks and adapt to changes in inputs," Sur said. "Unders...ide stimulation refines the brain's topography and networks to create the specific functions and areas of the postnatal mammalian brain. ...

How Fruitflies Know It's Time for Lunch

...s to gain insight into the adult and larval neural networks that use taste information to regulate eating. Spe...ercome taste aversion? How do the competing neural networks of taste and hunger signals decide whether the fly will eat? Future studies pairing behavioral and g...

Grid bridges 4,800 miles for molecular repositories

...le there have been attempts to launch similar grid networks in the United States, none are currently active, Straatsma said. The PNNL node on the BioSimGrid coincided with the lighting of a new high-speed, high-capacity fiber optic connection between PNNL's campus in Richland, Wash., and Seattle. This connec...

Researchers know what you were about to say; fMRI used to detect memory storage and retrieval

...creation of more self-sufficient artificial neural networks and robots. The study also broke new ground in how fMRI could be used to study how brain activity changes from second to second. Polyn and his Princeton colleagues gave participants 90 things to remember ?divided among celebrity faces, common obje...

Science's Breakthrough of the Year: Watching evolution in action

...rack multiple inputs and outputs of cell signaling networks simultaneously. For example, researchers created a model of nearly 8,000 chemical signals involved in a network leading to programmed cell death. ITER Lands in France: The struggle over the location of the world's first fusion reactor has ended -- t...

Brains response to visual stimuli helps us to focus on what we should see, rather than all there is to see

...tudy, Callaway and Yoshimura sought to look at the networks that pair together excitatory and inhibitory neurons. These neurons work directly with each other to shape responses to stimuli. This "go-no" kind of interaction is necessary, Callaway says, or a positive feedback of chemical signals across neuronal ...

Preventing a pandemic: Study suggests strategies for containing a flu outbreak

...hai 2000 census and a previous study of the social networks in the Nang Rong District in rural Thailand. With this information, they simulated a population of 500,000 in which individuals mixed in a variety of settings, including households, household clusters, preschool groups, schools, workplaces, and a ho...

Researchers discover key to human embryonic stem-cell potential

...factors that are responsible for activating entire networks of genes necessary for generating many different s...inactivated as the embryo begins to develop, these networks then come to life, and the stem cell ceases to be a stem cell. The new work provides the first wi...

Brain networks change according to cognitive task

...ndings answer longstanding debates about how brain networks operate to solve different cognitive tasks. They a...effective connectivity, Mesulam compares the brain networks to a network of highways connecting different parts of a city. The highway is static. No matter how ...

miRNAs and musculature

... placing Dmir-1 within established transcriptional networks in muscle. However, the authors find that muscles form normally in embryos in which expression of Dmir-1 has been ablated by gene targeting (Dmir-1 KO). A defect is only revealed when larval growth is initiated by feeding, which triggers paralysis ...

Frog peptides block HIV in lab study

...s awake, rippled across the brain, traveling along networks of nerve fibers to different cerebral destinations...another. In the brain, messages are relayed along networks of nerve fibers. Cells transmit information along those fibers electrochemically. Anatomically, the ...

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