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Tag: "models" at biology news

Researchers develop way to calculate speed of bacterial sex

...hers believe this new model improves upon existing models by taking into account characteristics of the natu...dered about its impact in nature, current computer models of conjugation were pretty basic," said Ginn. UC-Davis researchers set out to build a better model t...

Herpes infection may be symbiotic, help beat back some bacteria

...ental level. This could mean the virus-free animal models scientists use to study vaccines, autoimmune diseases, and other immune system issues have the potential to produce misleading results. "Chronic virus infections may in part define what a normal human immune response is," says Virgin, who is the E...

The quest for an effective HIV vaccine presents new possibilities, challenges

...me benefits, say the authors. In non-human primate models of HIV infection, T-cell vaccines have reportedly decreased the total amount of virus produced during early infection, caused a reduction in virus levels following the acute stage of infection, or produced some combination of these effects. In many o...

Latent memory of cells comes to life

...he University of Copenhagen have used mathematical models and computer simulations to examine fundamental mechanisms of cell memory. The research is an interdisciplinary cooperation between molecular biologists and physicists and has just been published in the prestigious scientific journal CELL where it is...

Executable biology -- Computer science sheds light on animal development

... as normal development. Traditional biological models give a fairly static picture of cellular processes... had not been described before. These kinds of models hold great promise for future exploration of a variety of biological systems, explains lead EPFL res...

Improved predictions of warming-induced extinctions sought

...B. Botkin, note that although current mathematical models indicate that many species could be at risk from g...hat this "Quaternary conundrum" arises because the models fail to take adequate account of the mechanisms by which species persist in adverse conditions. Cons...

MIT's ocean model captures diversity of underwater forests

...rinciples of natural selection. Scientists use models such as this one to better understand the oceans' .... Chisholm believes that because previous ocean models did not convey the diversity of phytoplankton, they did not well represent the systems they modeled....

In young mice, gregariousness seems to reside in the genes

...ution, as well as developing more realistic animal models of pervasive developmental disorders, such as autism. In past research, the social capacities of rodents have been studied primarily in the context of behaviors associated with sexual reproduction, territorial defense and parental care. Those stud...

Researchers develop marker that identifies energy-producing centers in nerve cells

...Maryland School of Medicine, says there are animal models for several of these diseases including Parkinson'...h the fluorescent protein could be bred with mouse models of various neurological diseases, so we could apply the ability to see mitochondria in neurons to th...

Rapid response was crucial to containing the 1918 flu pandemic

...Through MIDAS, researchers have developed computer models to examine how a future pandemic influenza virus m...could minimize the impact. “Although the MIDAS models can’t predict the exact spread of a potential influenza pandemic, they have all suggested that intro...

Sandia researchers take new approach to studying how cells respond to pathogens

...utational modeling is then used to develop network models from experimental data and predictive modeling gen...ed platform, biological reagents and computational models developed under this project have applicability beyond infectious disease research. These technologi...

Gut research yields new anti-cancer approach

...experiments using colorectal cancer cells as study models because they arise from normal gut cells and share some of their qualities (e.g. normal inflammatory signals). Unlike normal gut cells, however, cancer cells do not die when removed from the gut wall. Living on in the absence of normal survival signa...

Study shows isolation of stem cells may lead to a treatment for hearing loss

... stem cells in well-established hair cell ablation models and in deaf mouse mutants with predictable patterns of early hair cell loss. This line of research will evaluate the in vivo survival and differentiation of self-renewing cochlear cell populations and potentially lead to new therapies for the numero...

Researchers learn what sparks plant growth

...ion of each plant hormone and will be able to make models to predict how they work together to give rise to the tremendous diversity of shape and form found in the flowering plants," said Chory. For the moment, the research is an important addition to the fundamental knowledge of plant growth and surviva...

Scripps research study shows humans and plants share common regulatory pathway

...ogrammed cell death. Despite the fact that various models of Nod1 activation have been described, little has been known about other proteins that might affect the protein’s activation. In contrast, a number of additional proteins have been linked to the activation pathways of the R protein in plants. "T...

Type of stem cell found to reside in transplanted lungs

...effect of these cells in various diseases, such as models of heart attacks and pulmonary fibrosis. The current study of MSCs included 172 bronchoalveolar lavage fluid samples collected and analyzed from 76 lung transplant recipients at the U-M Health System. The ability to isolate these cells with relati...

Remote sheep population resists genetic drift

...ll decrease over time. "What is amazing is that models of genetic drift predict the genetic diversity of these animals should have been lost over time, but we've found that it has been maintained," said Dr. David Coltman, an evolutionary geneticist at the University of Alberta. "We think this has hap...

Columbia scientists determine 3-dimensional structure of cell's 'fuel gauge'

...kes in and uses to create ATP. Research in rodent models has shown that AMPK activators can lessen the pathologies associated with diabetes, including problems that diabetics have regulating blood sugar. Dr. Shapiro explained that researchers do not yet know how to activate AMPK without activating other...

3 proteins may play important role in nerve-cell repair

...e approach can be translated in preclinical animal models of stroke or spinal cord injury." ...

NASA predicts nongreen plants on other planets

...the VPL. The VPL team is using a suite of computer models to simulate Earth-size planets and their light spectra as space telescopes would see them. The scientists' goal is to discover the likely range of habitable planets around other stars and to find out how these planets might appear to future planet-fi...

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