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Tag: "timing" at biology news

Research team identifies new Alzheimer's gene

...d decision regarding the most appropriate type and timing of treatment,” said Dr. Chris Heward, President of Kronos Science Laboratory. Until recently, researchers lacked the technology to examine the genetic components of a disease at such a high-level of detail. By utilizing the Affymetrix 500K Arrays,...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...lding trees of relationships among the species and timing the divergences of the species with molecular-clock methods. "Molecular clocks work by counting the number of DNA-sequence mutations separating two species and then dividing that number by the rate of change, which is established with the help of fo...

Research shows cord blood comparable to matched bone marrow

...ght return,” Wagner said. “For the first time, the timing of transplantation can be dictated by the patient’s needs as opposed to the availability of the matched bone marrow.” The research suggests that it will become more important to invest in cord blood banks that meet certain standards in relation ...

Research finds that circadian rhythms dominate all life functions

...pression is affected by circadian rhythms, and the timing of the rhythms from each group of genes that are s...cycle over a period of about 24 hours and regulate timing for most physiological functions and behaviors such as sleeping, eating and activity. As a checks-an...

Weizmann Institute scientists develop a general 'control switch' for protein activity

...genetically engineered plants in which the precise timing of fruit ripening would be controlled using a substance that increases the activity of proteins responsible for ripening. Moreover, numerous proteins are used in industrial processes, as biological sensors and in other applications. The possibility o...

Iowa State scientists demonstrate first use of nanotechnology to enter plant cells

...ls. This unique feature provides total control for timing the delivery The team’s first attempt to use the porous silica nanoparticle to deliver DNA through the rigid wall of the plant cell was unsuccessful. The technology had worked more readily in animals cells because they don’t have walls. The nanop...

Rapid response was crucial to containing the 1918 flu pandemic

...trictions. The second study also shows that the timing of when control measures were lifted played a majo...what would have happened if cities had changed the timing of interventions. In San Francisco, which they found to have the most effective measures, they estim...

New report: Explosive growth changes salmon industry

...of salmon products that are available, altered the timing of production and raised market quality standards. These changes have raised economic, environmental and trade questions. For example, how does wild salmon, which no longer provides the bulk of North America's salmon, remain a competitive product? ...

Wired for sound: How the brain senses visual illusions

... two distinct flashes of light. Investigating the timing and location of the brain processes that underlie this illusory effect ?the illusion of seeing two flashes in the presence of two auditory signals, when only one flash actually occurs ?can reveal how information from different senses are integrated i...

Keeping the body in sync -- The stability of cellular clocks

...rylation event gone wrong could lead to inaccurate timing of our body clockworks. ...

Wheat can fatally starve insect predators

...ts to study insect-plant interactions. Knowing the timing and location of those interactions would enable th..."Once we understand which genes are active and the timing of the interactions, we can really understand what the insect says to the plant and how the plant re...

Biologists prove critical step in membrane fusion

... fully fuse ?there is the potential to control the timing of drug delivery. ...

DNA analysis reveals rapid population shift among Pleistocene cave bears

... new, genetically distinct cave bear group. The timing of the disruption appears to roughly coincide with the arrival of modern humans in the Ach Valley, thought to have occurred by 32,000 years ago. The researchers suggest that human influence in the form of hunting and competition for sheltering caves ...

How fish conquered the ocean

...and thus drive hydration of the maturing eggs. The timing of these events matches the appearance of the vast numbers of marine acanthomorph teleosts in the fossil record. The authors propose that the neo-functionalization of duplicated vitellogenin genes was a key event in the evolution and success of the a...

The great escape -- fleeing fish fall in line

... within a school were then ranked according to the timing of their escape. The experiment was performed ten times at 10 minute intervals on a total of seven separate schools of grey mullet. Interestingly, results suggested that there is a trend for individual fish to maintain a given rank, indicating that...

How does your brain tell time?

...es and counts regular fixed movements -- underlies timing in the brain. In contrast, Buonomano suggests a p...ns. The researchers found that volunteers?sense of timing was impaired when the interval was randomly preceded by a "distracter" tone. "Our results suggest...

Global changes alter the timing of plant growth, scientists say

...anta Barbara, Calif. "If climate change alters the timing of plant activity, then it could have a domino eff...t species overlap more in the future because their timing is altered by global changes, it could lead to decreases in local plant diversity and negatively imp...

Novel pathway regulates timing of brain cell development

...vering a new molecular pathway that influences the timing of nerve-cell production. The pathway--which acts...rmations in the brain's circuitry. "Changes in the timing in which different neural cells are produced could lead to alterations in brain wiring," he says. "T...

Detailed 3-D image catches a key regulator of neural stem cell differentiation in action

... with an inhibitor would allow us to influence the timing of neuronal differentiation," he adds. A finely tuned network of molecular "on" and "off" switches orchestrates the differentiation of embryonic stem cells into different tissue types. Being able to manipulate individual switches would allow scie...

Artificial cornea offers better results for infants, some blind patients

...tic implant, these kids are looking great. "The timing is crucial, because if a child hasn't seen out of an eye for a few years, and then suddenly vision in the eye is fixed, the brain doesn't know what to do with that information," Gearinger added. "If the brain has been deprived of vision at an early a...

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