Sentences with phrase «study animal numbers»
Using «footprint DNA» from snow or mud could let them study animal numbers and movements more cheaply and without disturbing habitats.
https://www.scientificamerican.com/ Not exact matches
There have been lots of cell and animal research, which prove that turmeric has a good influence on a number of illnesses and also several human studies have shown positive results as well.
A number of lab and animal studies have found that healthy organic food may increase antioxidant content, helping to protect cells from damage.
As in cellular assays, the animal studies have shown that drug treatment leads to improvement in nuclear gem / Cajal body numbers in motor neurons.
In animal studies, repeated dosages of psilocybin diminish the number of 2A serotonin receptors, which dampens their expression.
Dr. Julie Wolf, U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS), senior author of the study said: «In many regions of the world, livestock numbers are changing, and breeding has resulted in larger animals with higher intakes of food.
Evidence that animal pheromones don't always work in they way we thought, backed up by a growing number of brain - imaging studies in humans, is convincing some researchers that we really do make and respond to pheromones.
Furthermore, animal studies suggest that taste buds produce hormones that are important for glucose metabolism and that, in rodents, taste buds decrease in number with age.
«Before this study, it was not known if it is possible to produce sufficient numbers of these cells and successfully use them to remuscularize damaged hearts in a large animal whose heart size and physiology is similar to that of the human heart,» said Dr. Charles Murry, UW professor of pathology and bioengineering, who led the research team that conducted the experiment.
Hanna Granroth - Wilding, who led the study, said: «Our knowledge of disease in wild animals has tended to focus on the individual, but our study shows that we need to pay more attention to the broader consequences of disease to fully appreciate the role that it plays in wild populations, especially those whose numbers may be under threat.»
The scientists are now expanding their research to larger numbers of animals and they are also planning a study to look at addiction - like behaviours in obese people to see how well their results translate to humans.
A new study by University of Arizona biologists helps explain why different groups of animals differ dramatically in their number of species, and how this is related to differences in their body forms and ways of life.
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.
But whereas children recreating these vicious displays simply ram plastic models of the animals together in a straight line, a study now suggests that pachycephalosaurs may have bashed one another in a number of different ways.
The study of fluids in motion, she says, enables understanding of a huge number of phenomena in a vast range of fields, including biology, meteorology, medicine, astronomy, geology, oceanography, sports, animal behavior, and even highway traffic.
Lead author Paul - Yannick Bitome - Essono, from the National Center for Scientific and Technological Research, France, explains: «We thought the tsetse fly might be a good candidate in our study, as both sexes feed on blood, they are large and easily trapped, present in large numbers in Central Africa, and are opportunistic feeders with no strong preference for a particular host animal, so would feed on a large range of wildlife.»
Moreover, he says, the study suggests that other creatures may possess the «foundational mechanisms» that enable humans to reason so well with numbers and that «perhaps even advanced mathematical abilities may be found in other animals.»
Yet, according to a new study involving 147 cities worldwide, surprisingly high numbers of plant and animal species persist and even flourish in urban environments — to the tune of hundreds of bird species and thousands of plant species in a single city.
For the animal study, the researchers separated 52 mice with colon cancer tumors into three groups, including a control group and groups that were fed either the grape compounds or sulindac, an anti-inflammatory drug, which was chosen because a previous study showed it significantly reduced the number of tumors in humans.
Noninvasive imaging using PET and other technologies reduces the number of animals in a study by permitting the use of animals as their own controls, according to the authors.
This study also increased the number of genetic markers scientist can use to study the population biology of great white and related sharks, Stanhope said, by a thousandfold, from which they hope to further expand knowledge of these fascinating animals, many of which are in urgent need of conservation.
The causes of such unpredictable results, Harris said, can include bad ingredients in the lab, including contaminated and misidentified cell lines; poor research design, including insufficient numbers of mice in animal studies; statistical error and overreach, including «HARKing» (hypothesizing after the results are known), a push beyond the limits of the data; and funding pressures, which can lead scientists to hype or exaggerate their results to remain competitive for additional grant money.
The review's sole author, Dr. Patricia Lopes from the Institute of Evolutionary Biology and Environmental Studies at the University of Zurich, says that animals from a number of different species will eat and drink less, reduce their activity and sleep more when they are sick in order to conserve energy for their recovery.
During the study of a number of aardvarks by researchers of the Brain Function Research Group at the University of the Witwatersrand, all but one of the study animals — as well as other aardvarks in the area — died because of a severe drought, with air temperatures much higher than normal and very dry soil in the area.
She remembers thinking that given the huge number of animals using bioluminescence, it must be «one of the most important processes in the ocean, and yet hardly anyone was studying it.»
«That they looked across a large number of groups over a long time makes this a powerful [study],» says Jeffrey French, an animal behaviorist at the University of Nebraska, Omaha.
«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.
This enabled them to greatly reduce the number of laboratory animals, because usually different groups of animals have to be used for such comparative studies.
«This particular sponge species, which is among the most ancient animals inhabiting the earth today, is home to a very diverse, very crowded number of microorganisms,» said Prof. Micha Ilan of the Department of Zoology at TAU's Faculty of Life Sciences, who led the study.
C.elegans has been used for decades as a model animal to study the genetic and molecular underpinnings of neurological disorders through a number of techniques including bio imaging, electrophysiology and behavior.
A growing number of studies have demonstrated that, at least in animals, these unusual fats fight a host of chronic health conditions from heart disease to diabetes to cancer (SN: 3/3/01, p. 136).
Müller warns that when animal cognition researchers put together their study groups, they may be missing this kind of effect if they aren't including equal numbers of male and female animals.
But if there is no indication of an elevated risk, he says, the effects of exposing animals to such a combination repeatedly are not studied, in part to reduce the numbers of animals used in testing.
All Grant's gazelles (Nanger granti) have intestinal worms, but according to a study presented in Princeton, New Jersey, at the Animal Behavior Society meeting last week, those males able to defend land and a harem begin their reign with a relatively low number of parasites.
Previous studies may have overestimated the numbers of animals by counting cheetahs just passing through an area as permanent residents.
A study comprising over 80 forests in Germany and on Sumatra (Indonesia) has now shown that two factors particularly influence this function when examined over larger landscapes: the number of animals and their species diversity.
Goodall also set herself apart from the traditional conventions of the time in her study of primates by naming the animals she studied, instead of assigning each a number.
In a previous study, Lonard and co-senior study author Bert O'Malley of Baylor College of Medicine screened a large number of compounds to identify SRC - inhibiting molecules that kill a wide variety of cancer cells and inhibit tumor growth in animal models.
As a result of non-target species possibly being included in past research studies, it has been thought that snow leopards — who lack an abundance of natural prey — consume great numbers of small mammals such as marmots, hares and pika, as well as wild ungulates, which are larger hooved animals such as ibex.
Moreover, these preclinical imaging approaches provide the unique opportunity to perform longitudinal studies of the same animal, minimizing experimental variability and number of animals per study.
In lab animal studies, we aim to reduce variability between groups by housing all of the animals in the same room, using the same number of animals per cage and using the same water, bedding, enrichment and diet.
While much recent research has not been published in this area, there is actually a long history of studies that show: (1) there is a significant number of antigens shared between tumors and embryonic tissues (called «oncofetal antigens») and, consequently, antibodies made against tumors can also recognize embryonic tissues, and vice versa; (2) pregnancy confers some immunity against cancer (accompanied by antibody production against oncofetal antigens), not only against its occurrence but also against its growth; (3) similar to pregnancy, an immune response against cancer can be generated by vaccinating animals with embryonic tissues.
Thus, BPRC is fully compliant with the international demands on animal studies and welfare as set forth by the European Council Directive 2010 / 63 / EU, and Convention ETS 123, including the revised Appendix A as well as the «Standard for humane care and use of Laboratory Animals by Foreign institutions» identification number A5539 - 01, provided by the Department of Health and Human Services of the United States of America's National Institutes of Health (NIH) and Dutch implementing legislation.
Finally, a number of other studies of vaccines in animal model systems have been reported but presence or absence of immunopathology after challenge was not reported.
[19] In the current study, [15] PDGF - AS mice exhibited an increased number and intensity of areas staining for reactive microglia (using Iba1) and astroglia (using GFAP), but vaccination with AFF 1 prevented nearly all of this disease - associated excess, with treated animals exhibiting only the burden of reactive glia present in similar - aged WT mice.
«This review describes a number of studies which provide some hints that sulfur amino acid restriction might achieve some of the benefits observed in animal models, including cancer inhibition and reducing risks for cardiovascular disease.»
- All studies should use the minimum numbers of the most appropriate species and strain of animal to achieve the scientific objectives.
• All studies should use the minimum numbers of the most appropriate species and strain of animal to achieve the scientific objectives.
The protocol was approved by the Institutional Animal Care and Use Committees of the US National Institute of Child Health and Human Development (Animal study protocol number 12 - 059).
ICS is involved in international programs designed to reduce the number of animals used: Eumorphia: this program is about standardization of phenotyping procedures and statistical studies.