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Tag: "interactions" at biology news

Salamanders suffer delayed effects of common herbicide

...esses, persistent effects of chemical exposure, or interactions among individuals within and between species that can affect our estimates of safe chemical concentrations." Atrazine is one of the most widely used pesticides in the United States, and possibly the world. It is relatively long-lived and is even ...

Meeting the ethanol challenge: Scientists use supercomputer to target cellulose bottleneck

...ations have given us a better understanding of the interactions between the enzyme complex and cellulose at the molecular level -- the computer model showed us how the binding portion of this enzyme changes shape, which hadn't been anticipated by the scientific community," said first author Mark Nimlos, a Senior ...

Targeting tumors the natural way

...s are displayed together. These weak "multivalent" interactions cut down on cases of mistaken identity, because if the agent contacts the wrong cell type, it can be easily displaced. The team got the idea to mimic this process from efforts to transplant pig organs into primates. The surfaces of most mammalian ...

Common mechanisms for viral DNA replication

...escribing the molecular details of the DNA–protein interactions and the alterations in protein structure induced by DNA binding, we present a model describing the subsequent assembly events. ...

Satellites shed light on global warming

...sense they ‘set the rhythm?for some aspects of the interactions between oceans and climate. Faster waves in a warmer ocean, as an effect of climate change, may result in complex repercussions on the climate system, many of which could turn out to accelerate the change," Dr Paolo Cipollini of the National Oceanogr...

MIT's ocean model precisely mimics microbes' life cycles

...es that wax and wane in relative abundance through interactions with each other, and the environment, as dictated by natural selection," said Chisholm. Indeed the guiding principle of the new model is natural selection. It simulates the physical and chemical characteristics of the oceans, but adds to the virtu...

Does a peptide affect the heart's response to social isolation?

... small rodents that demonstrate features of social interactions similar to humans and therefore provide a useful animal model for investigating how the social environment influences behavior and cardiac function. Earlier studies by this research team showed that when prairie voles were isolated from their familie...

Cancer cells forming blood vessels send their copper to the edge

...an happen so rapidly during angiogenesis, then the interactions of metal ions, such as copper, with the proteins and macromolecules that bind them in the cell must have very fluid dynamics themselves. ...

NYU scientists identify how development of different species uses same genes with distinct features

...nd wasps employ most of the same genes and similar interactions among these genes, but some events are changed to adjust to the developmental constraints. Flies rely on a gene called bicoid to pattern their early embryo. The bicoid gene product, a messenger RNA (mRNA), is localized at the anterior of the embry...

Virginia Tech's System X supercomputer provides super tool for simulation of cell division

...Kathy Chen, wanted to characterize all the protein interactions regulating the cell cycle of budding yeast (the yeast cells familiar to bakers and brewers, and a favorite organism of molecular biologists, as well). "Such fundamental research on the cell cycle of budding yeast provides a basis for understanding th...

Gene key to taste bud development identified

...he new findings not only provide insights into the interactions between SOX2 and tongue stem cells during embryonic development, but also into how stem cells continue to operate in adults, the researchers said. The researchers published the findings in the October 2006 issue of the journal Genes and Development...

Key to zebrafish heart regeneration uncovered

... achieve their full regenerative potential without interactions with the layer of "epicardial" cells that forms over the blastema. The entire heart is wrapped in a membrane known as the epicardium. By the third day after injury, the epicardial cells begin to cover the injury site, a process that takes approxim...

Interaction between lymph and liver cells may affect immune response

...in regulating the immune response) found that such interactions do occur and demonstrated the mechanism by which t...alia, has led to the first study investigating the interactions between lymphocytes (T cells), liver sinusoidal endothelial cells (LSECs) and hepatocytes (liver cel...

OHSU researchers demonstrate how white blood cells cannibalize virus-infected cells

...e serendipitous. The researchers were studying the interactions between virus-specific T-cells and fluorescently labeled infected cells when they noticed that the T-cells also began to glow with the fluorescent dye. Further investigation revealed that the CD8+ T-cells, often referred to as "killer" T-cells, were ...

With fruit fly sex, researchers find mind-body connection

...g increasingly clear in the field, is that genetic interactions that influence behavior are more complex than we thought," said Michael McKeown, a Brown biologist who led the research. "In the case of sex-differences in flies, there isn't a simple two-track genetic system ?one that shapes body and one that shapes...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

...the active center and form an extensive network of interactions with the NTP and other parts of the enzyme. Those interactions leave another side chain in the trigger loop precisely positioned, such that it may literally “trigg...

Invasive ants territorial when neighbors are not kin

...e biologists provide the first data on territorial interactions among Argentine ants in the field. In California,...ter rate." In their native Argentina, aggressive interactions between colonies are much more common and colonies are significantly smaller. When Argentine ants w...

Theory of oscillations may explain biological mysteries

New mathematical studies of the interactions between oscillating biological populations may she...lant populations oscillate in synchrony because of interactions such as predation and competition. Such synchronization can have far-reaching effects. Vandermeer su...

Power emerges from consensus in monkey social networks

...portant because it can influence the complexity of interactions among group members. "When building a society, it is of utemost importance that signals be informative and any sources of ambiguity minimized," says Krakauer. "This requirement is reflected in the structure and function of communication networks. A ...

Are genomic technologies the answer to world hunger?

...es. Others argue that even greater private-public interactions are not sufficient. Dr Andy Hall, from the Maastr...mitations". Dr Hall argues for a strengthening of interactions with communities and society in general. Prof. Paul Richards of Wageningen University, says that no...

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