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Tag: "biologists" at biology news

Antifungal drug kills TB bug

...aunched initiatives to tackle the problem. Now, biologists at The University of Manchester have shown that chemicals called azoles ?the active agent in many antifungal drugs ?kill the TB bacteria, and could be effective in tackling the emerging drug-resistant strains. "TB is back with a vengeance with a t...

Yale biologists 'trick' viruses into extinction

...uman changes to the environment cause conservation biologists to worry about species extinction, Yale biologists are reversing the logic by trying to trap viruses in habitats that force their extinction, according...

Paleontologists discover new mammal from Mesozoic Era

...nd. Consequently, paleontologists and evolutionary biologists have been searching for more than a century for cl...mmals from China have built the evidence such that biologists and paleontologists are able to make sense of how developmental mechanisms have impacted the morphol...

OHSU lab finds meth receptor that could lead to therapy

... at OHSU is one of the few in the U.S. that allows biologists and chemists to work side-by-side, using their combined skills to identify drug targets and to design new drugs to treat diseases like drug addiction," said David Dawson, Ph.D., OHSU professor and chairman of physiology and pharmacology. "Chemical sp...

Microfluidic chip helps solve cellular mating puzzle

... cell’s response by triggering multiple genes. But biologists have been baffled for years as to why two different forms of MAPKs perk up when the mating call arrives. Only one of them, called Fus3, appeared to be in charge of the courtship process, while the other was thought to be moonlighting away from its ma...

Salamanders suffer delayed effects of common herbicide

...using die-offs in stream salamanders, according to biologists who say findings from their long-term study raise concerns over the role of atrazine in global amphibian declines. The results also suggest that while impacts of the herbicide, atrazine, may not show up in short-term studies, even extremely low conc...

Lizards 'shout' against a noisy background

.... Anole lizards are interesting to evolutionary biologists because different species are found on different islands all over the Caribbean. The lizards are not particularly closely related -- they are separated by 30 million years of evolution -- but they live in similar environments with the same obstacles ...

Engineering the heart piece by piece

...orative research between engineers, clinicians and biologists for successful cardiovascular tissue engineering research. “Although there remain tremendous technological challenges, we are now at a point where we can engineer first-generation prototypes of all cardiovascular structures: heart muscle, tri-lea...

Newly discovered fish named after New York aquarium biologist

...eshwater fishes, received the honor from a team of biologists from the American Museum of Natural History (AMNH), after they named a new species of cichlid Ptychochromis loisellei. The announcement was made in a recent edition of American Museum Novitates. The authors of the paper wrote that the new species...

Fruit fly gene research may shed light on human disease processes

...ethal to embryos of mammals and flies. That's why biologists want to understand the process of "chromosome counting." Early in his career, Erickson was part of the research team that identified the genes involved in counting Drosophilia sex chromosomes. Now, he and Avila have made another breakthrough, ide...

How fish conquered the ocean

...cessful radiation is unexplained and has intrigued biologists for many years", says Dr. Finn and adds, "Our paper in PLoS ONE relates to the molecular solutions evolved among the teleost ancestors and provides a compelling hypothesis of when, how and why the teleosts succeeded in the oceanic environment. It is ...

MIT's ocean model precisely mimics microbes' life cycles

...ocean systems in a way that is consistent with how biologists think of them-water filled with millions of diverse microbes 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 n...

Biologists call for better choice of model organisms in 'evo-devo'

...to illustrate key questions about evolution, argue biologists in the latest issue of Nature Reviews Genetics. The subject of evo-devo, which became established almost a decade ago, is particularly dependent on the six main model organisms that have been inherited from developmental biology (fruit fly, nematode...

MIT device draws cells close -- but not too close -- together

...ce, a microelectromechanical system (MEMS), allows biologists to physically arrange cells to be either touching,...luble molecules that flow between separated cells, biologists need to vary the spacing of cells to study their interactions. Also, since some signals induce a cel...

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

...ems. Fruit flies?development is well-understood by biologists and therefore serves as an appropriate focus for genetic analyses. In this study, the researchers sought to explore the generality of developmental mechanisms by comparing Drosophila with Nasonia, a distant species that diverged over 250 million year...

Global map shows new patterns of extinction risk

...s the culmination of many decades of work by field biologists and analysts, during which the planet was divided up into 100km x 100km grids, and all mammal, bird and amphibian species within each grid square were counted, using a variety of pre-existing, but never-before combined, records. The result is a compr...

How fish mend a broken heart

...e of vertebrate evolution." Poss said. "Thus, most biologists suspect that the machinery to optimize regeneration from progenitor cells is present, but lies dormant, in mammals." In an earlier study, Poss and his colleagues found that zebrafish have a unique ability to regenerate cardiac muscle after major in...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...cyst with a fertilized embryo, which produces what biologists call a chimera, or by performing another nuclear transfer using the embryonic stem cells derived from these blastocysts, could "cloned" pups be produced. Even so, other researchers have countered these are not bona fide clones because they possess ch...

Key to zebrafish heart regeneration uncovered

...ng the formation of new heart muscle. Many cell biologists believe the ability to regenerate damaged heart tissue may be present in all vertebrate species, but that for unknown reasons, mammals have "turned off" this ability over the course of evolution. Zebrafish could provide a model to help researchers fi...

Salmon farms kill wild fish, study shows

...n more." The research was conducted by a team of biologists and mathematicians working in coastal British Columbia. "We counted sea lice on more than 14 thousand juvenile salmon migrating past fish farms, and conducted mortality experiments with more than 3,000 fish," said Krkosek. "We then used mathematical ...

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