Sentences with phrase «by changes in»

The regions where droughts have occurred seem to be determined largely by changes in SSTs, especially in the tropics, through associated changes in the atmospheric circulation and precipitation.

It is difficult to distinguish the effects of a single amino acid change caused by those changes in our DNA.»

Another hypothesis for why the glacial periods terminate and restart is GCR modulation by changes in the intensity of the earth's magnetic field.

There are all sorts of quality control issues with analysing long - term climate records [ie are there biases introduced by changes in the measuring instruments used?]

This relationship however, is partially mediated by changes in family income, savings, and an individual's status in health insurance and employment, with the latter two factors resulting from likely job loss.

Charity care was unaffected by changes in Medicaid coverage, but increased in markets where more people became uninsured.

The 20,000 - year cycle is driven by changes in the Earth's orbit around the sun, which affects the amount of sunlight received during any particular season.

To reduce the chance that our results were driven by changes in reporting, we included counties with complete case capture from 2010 through 2013.

The researchers found that the rates of subclinical atherosclerosis progression, as measured by changes in common carotid artery intima - media thickness or coronary artery calcium, did not differ significantly between men assigned to the testosterone or placebo groups.

Also, we would like to study what percentage of the association between respiratory tract infections and asthma can be explained by changes in lung function, and whether the associations change when we take early - life wheezing into account,» she will conclude.

«The whole horse history is driven by changes in climate,» says Willerslev.

In future, Gilmour and colleagues would like to understand the interplay between the ability — or decision — to stop and signals that they previously found drive cells to move forward, and how both are influenced by changes in cell shape.

And Brakenridge points out another less immediate application: «We have to know how big a flood event is and keep a global record of such events in order to determine if climate change is accompanied by changes in the frequency and magnitude of big floods.»

Climate scientists have long suspected that these glacial cycles are triggered by changes in our planet's orbit.

Although this effect was not accompanied by changes in serum triglycerides, it is noteworthy that db / db mice retained physiological responses to musculoskeletal loading despite severe and widespread metabolic deficits.

Greeting calls (A) are accompanied by changes in the same articulators (B) as for contact calls.

Because these analyses did not change the main findings, we did not find any indication that the observed improvement in survival was driven by changes in reporting.

This study shows that the effect of mitochondrial dysfunction on nuclear DNA methylation is mediated by changes in methionine and polyamine metabolism.

A component of HbA1c that is independent of mean blood glucose may not be modifiable by changes in insulin dosing.

Short - term plant movements are caused by changes in water pressure within tissues.

In the new study, Tulin and his colleagues reevaluated how PARP1 is activated by changes in the nucleosome.

Using mouse and human - derived dopamine neurons, researchers found that dopamine movement is affected by changes in electrical properties of the neurons.

«The results of this study show that many drugs may be affected by changes in the intestinal flora,» said Professor Ohtsuki.

Changes in these proteins have a great influence on drug efficacy and side effects since they are responsible for the metabolism and transport of many drugs, and are also affected by changes in the intestinal flora.

«The cortical folding pattern itself may not be so important, but the disturbances in connections between brain regions implicated by the changes in cortical folding could provide critical clues to deficits in the integrity of brain circuits that contribute to symptoms and functional impairment in schizophrenia,» commented Dr. John Krystal, Editor of Biological Psychiatry.

PEOPLE who have chronic pain are more likely to experience mood disorders, and the two may be linked by changes in gene activity.

Mutation of a bacterial flagellar regulator gene can be compensated for by changes in a related nitrogen uptake regulator.

In the study, researchers analyzed a series of transient Coupled General Circulation Model simulations forced by changes in greenhouse gases, orbital forcing, meltwater discharge and the ice - sheet history throughout the past 21,000 years.

The finding suggests that sea life is already being affected by changes in the ocean's chemistry caused by rising carbon dioxide levels.

He was puzzled by the changes in the nanotubes» electrical resistance when he turned the gauge on and off.

Rather than inheriting big brains from a common ancestor, Neandertals and modern humans each developed that trait on their own, perhaps favored by changes in climate, environment, or tool use experienced separately by the two species «more than half a million years of separate evolution,» writes Jean - Jacques Hublin, a paleoanthropologist at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, in a commentary in Science.

Professor Sybren said: «It can be excluded, however, that this hiatus period was solely caused by changes in atmospheric forcing, either due to volcanic eruptions, more aerosols emissions in Asia, or reduced greenhouse gas emissions.

On Titan, the largest features may be made by changes in the thickness of its ice shell due to tidal forces from Saturn.

«The next challenge is to determine how these behavioural changes are brought about by changes in the brain.

The benefits, however, are likely to outweigh the risks because individualized treatments and targeted therapies can be developed with the potential to be applied across the many diseases that are driven or assisted by changes in DNA.

The first and fourth strains were least affected by changes in pH levels.

They found that the eastern part of the Eurasian Basin is evolving into a state with fewer distinct layers defined by changes in temperature and salinity.

A decrease in recorded gunshots would be a reliable indicator that police hiring is preventing crime, as it is not affected by changes in reporting.

The tetherless Seaglider drives through the water at a speed of about 1.8 kilometers per hour, driven by changes in buoyancy rather than a propeller system.

These results imply a dual mechanism for pattern separation in which signals from the entorhinal cortex can be decorrelated both by changes in coincidence patterns in the dentate gyrus and by recruitment of nonoverlapping cell assemblies in CA3.

Dr Jonathan Clarke, Head of Business Development at JIC said, «The continuity of food production is being challenged by changes in our climate.

Variations in N - CAM activity thus do not occur by changes in the amino acid sequence that alter the specificity of binding.

«Our results also suggest that effects of smoking during pregnancy on infant stress response are explained by changes in DNA,» Stroud says.

Together they have used traditional methods from climate research to study how animals are affected by changes in the climate.

The abundance of foraging wading birds was also tied to the phases of the moon, but this turned out not to be driven directly by changes in the availability of shallow - water habitat.

They were able to show that episodes of extinction coincided with pulses of ocean anoxia, driven by changes in ocean circulation and nutrient levels.

Soon after he arrived in Monrovia, he became convinced that the Liberian decline is real, driven in large part by changes in behavior that reduce the risk of infection.

In some areas, particularly in Eurasia, climate change — as measured by changes in temperature and precipitation from 21,000 years ago until now — also seems to have influenced extinction rates.

But by hierarchical clustering of observed alterations in endocytosis, the researchers identified two distinct cancer phenotype clusters, one marked by mutations in the oncogene KRAS in mesenchymal cells and the other by changes in epithelial cells.

The DTI says it is «all for» a prototype project, but that a decision on funding is being delayed by changes in government policy, announced in the recent White Paper on science and technology.