Sentences with phrase «whether these animal studies»

Not exact matches

And while the science may be disputed, depending on who is funding the study, as to whether commonly used food dyes such as Yellow 5, Red 40 and 6 others made from petroleum pose a «rainbow of risks» that include hyperactivity in children, cancer (in animal studies), and allergic reactions, because of the problem of hyperactivity, the Center for Science in the Public Interest petitioned the Food and Drug Administration to ban the use of these dyes given that the British government and European Unionhave taken actions that are virtually ending their use of dyes throughout Europe.

«Identifying which of these candidate genes actually causes variation in responses to cold snaps will give us the potential to understand whether evolution to climate change can occur in both wild and domesticated animals, allowing us to better predict which species or breeds will be «winners» and «losers» and to better mitigate the effects of anthropogenic climate change on a wide range of organisms from beneficial pollinators to invasive pests,» said Theodore Morgan an associate professor of evolutionary genetics in the Division of Biology at Kansas State University and senior author of the study.

But he adds that future studies should take into account additional variables such as whether the animals are active at day or night and what the species's habitat is like.

«Several studies have measured parasite infection in urban animals, but surprisingly we are the first to measure whether wild birds living in a city were more or less infected by a parasite and a pathogen, as well as how these infections are linked to their physiological stress,» said Mathieu Giraudeau, a post-doctoral associate who previously worked with Kevin McGraw, ASU associate professor with the School of Life Sciences.

Still used today by some companies, the test involves applying a small amount of the substance under study to an animal's eye or skin for several hours, and then observing whether or not irritation occurs over the following week or two.

The study may explain why the thrush sounds melodious to us, but the debate over whether animals have music, and if it is similar to ours, remains open.

In the new study, Professor Pisani and colleagues used cutting edge statistical techniques (Posterior Predictive Analyses) to test whether the evolutionary models routinely used in phylogenetics can adequately describe the genomic datasets used to study early animal evolution.

But no one had studied the sediment record in enough detail to determine whether the animals and plants actually endured without variation prior to the extraterrestrial impact.

The team found that 89 % of the animal studies were not published at all, making it impossible for the IRBs to know whether the study had been reviewed by other experts.

Earlier animal studies have shown that A-beta can move into the brain if it's injected into the bloodstream, but scientists didn't know whether A-beta from the blood can be plentiful enough to form plaques in the brain.

The study found that parental relationships - specifically whether they were polyandrous or monogamous plays a key role in whether animal families stay together as a group or not.

The researchers read all of those studies, looking for things such as appropriate control groups and whether a sufficient number of animals had been used.

«These pet - animal studies have been extremely helpful in making decisions on whether to go into human clinical trials.»

In a new animal study, University of Missouri researchers examined how the development of obesity and insulin resistance contribute to bone - fracture risk and whether exercise prevents weight gain and diabetes and protects bone health.

Researchers note more animal studies are needed to determine whether the administration of IL - 27 can successfully treat severe illness from these viral infections.

Schwartz now wants to do a Yellowstone - wide hair study to help pin down grizzly population trends — information that could prove pivotal in the hot debate over whether the animals are prospering enough to be removed from the U.S. endangered species list (Science, 23 April 1999, p. 568).

In the new study, the Salk scientists used a mouse model of autism — an inbred strain of mouse previously found to display autism - like symptoms — to ask whether lowering the level of dicarbonyl methylglyoxal (a common byproduct of sugar metabolism) could alleviate symptoms of autism in the animals.

«While it is largely unknown whether animals are capable of making rational choices, this study provides the first evidence that fruit flies can, and do.»

And the trouble with extrapolating so much from mouse studies is that «nobody has actually shown over the long term how long these quote un-quote improvements persist, and we don't know whether it's broadly improving aspects of aging or it's specific to certain tissues,» said Matt Kaeberlein, a biologist who studies aging in dogs and other animal models at the University of Washington.

Large scientific studies in people and animals may help us understand the role of particular genes and neurochemicals in this process — and whether this process differs in the various forms of autism.

The researchers now want to study whether the signal molecules in higher animals, such as mice, have the same effect.

Most studies of animal warning colors focus on how well they deter potential predators, but far fewer have examined whether the same signals help their bearers avoid detection by parasites, prey, or competitors, the researchers say.

Of course, the choice of harness is not always straightforward and Peham is quick to recognize the need to extend the group's research, «We should study guide dogs for a longer period of time to find out whether any of the harnesses are associated with long - term problems in the animals.

Until recently, researchers could study signature whistles only in captive animals — raising the question of whether the whistle developed in response to capture, isolation, or stress.

A new study adds quantitative detail to an ongoing debate over whether such «conservation mascots» receive publicity and funding to the detriment of animals typically deemed less attractive.

One area that requires scientific expertise is environmental assessment, in which the site that will house the turbines is studied to determine whether drinking water, plants, or animals will be affected by a new wind - power facility.

«That means we can study such brain states in animal models like flies or mice without worrying about whether they have «feelings» or not.

This goal of this study, led by Geisbert and Ian MacLachlan, executive vice president and chief technical officer of Tekmira Pharmaceuticals, was to determine whether it is possible to protect animals against a lethal MARV - Angola infection when treatment was started at a point when animals have detectable levels of the virus in their system and show the first clinical signs of disease.

For the current study, Jessica Childs, a graduate student in Kroener's lab, applied VNS to a test group of rats used in the study in a process called «extinction learning» to determine whether the procedure could help the animals learn different behaviors and reduce their drug cravings.

«The plant can judge, by simply counting the number of action potentials spreading over the trap, whether useless dead material has landed inside it or if useful animal prey has been caught,» says Sönke Scherzer, an electrophysiologist at the University of Würzburg in Germany, and one of the study's co-authors.

In the new work, W. Tecumseh Fitch of the University of St. Andrews in Scotland and Marc D. Hauser of Harvard University designed a study to test whether the animals could follow more complicated sentence structures, in which words that depend on one another are separated.

«As with all good studies, this one generates many new questions,» says Staffan Bensch, an animal ecologist at Lund University in Sweden, who wonders whether the virus has benefitted some songbird species by killing off their avian predators, jays and crows.

«In previous studies, the increases in fructose consumption were accompanied by increases in overall food intake, so it is difficult to know whether the animals put on weight due to the fructose itself or simply because they were eating more,» Rhodes said.

«At the time, the US study showed that rapamycin extends lifespan irrespective of whether the treatment is given to young or aged animals,» says the Bonn - based researcher.

«It's become a fight over process and whether one can extrapolate animal studies to humans,» she says.

Previous studies have reported that trap - jaw ants sometimes jump with their jaws, «but it was unknown whether this behavior was meant to help them get away from a predator, and it wasn't clear that it actually improved their odds of surviving an encounter with a predator,» said University of Illinois graduate student Fredrick Larabee, who conducted the study with entomology professor and animal biology department head Andrew Suarez.

Hlusko has expanded her study to look at a broad range of mammal teeth — including many dire wolves from the La Brea tar pits in Los Angeles — to see whether these two traits are independently inherited in all animals.

The study adds to an ongoing debate about whether past peoples lived and hunted animals in a sustainable manner or were largely to blame for the extermination of numerous species.

Bill Muir, an animal genetics researcher at Purdue University in West Lafayette, Indiana, cautions that studies should be done to see whether there's any long - term impact on the mice's health, but says, «my guess is that omega - 3's are good for us, [so] they're probably good for the mice.»

And although some scientists are eager to begin new studies on chimps, but many wonder whether such research on these now - endangered animals will receive moral, or monetary, support.

More studies are needed to determine whether other birds and animals behave in a similar way, but the researchers suggest that installing special lights on planes could alert birds to begin their escape from a longer distance away.

In this new study, Kandel's former student, John H. Byrne, who heads the Department of Neurobiology and Anatomy at The University of Texas Medical School at Houston, has brought a new twist to the original learning method developed in Kandel's lab — a technique that consisted of shocking slug tails at regular intervals and then seeing whether the animals overreacted later when receiving another zap, a sign that they remembered their tormentors all too well.

Future studies should investigate whether, or how, the genetic alterations that lead to this ASD animal model change the serotonin system, with the aim to provide possible insight into serotonergic deficits in human patients, the authors say.

In a new study, researchers claim that parasitic lice can tell us much about the course of bird and mammal evolution, including whether the ancestors of these animals made it through a mass extinction that wiped out most of the dinosaurs.

Kelly says the study will help identify whether this strategy only occurs in cactus bugs or «is a deeply rooted developmental strategy among animals».

While monkeys may be infected with the bacterium, it's not yet clear whether the infection can pass from human to animal and vice versa, said Sheila Lukehart, a UW professor of medicine and global health who co-authored the study.

Data from the study indicate that stressed animals» intestines remain leaky regardless of whether the animals receive probiotics, he notes.

Eight past studies looked at whether the sweetener causes cancer in lab animals, says veterinary pathologist James Swenberg of the University of North Carolina at Chapel Hill.

They suggest that future studies incorporating animal models of childhood obesity take place over longer periods to determine how inactivity during youth contributes to adult consequences of obesity and whether interventions, such as reintroducing exercise, can affect this trajectory.

«The goal of this study was to determine whether these animals used the same genetic circuit to create and maintain the blastema tissue after injury.