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Tag: "biologists" at biology news

A human taste for rarity spells disaster for endangered species

...e protections are firmly in place and enforceable, biologists may do well to think twice before reporting a species' decline. ...

Female pronghorns choose mate based on substance as well as show

...cues that may indicate genetic quality. Until now, biologists have focused on elaborate ornaments, such as the peacock's tail, as cues that females might use. The thorny problem has been to explain how the correlation between male genetic quality and ornament quality can be maintained. If an ornament gives a m...

How does a zebrafish grow a new tail?

... activating resident stem cells." Developmental biologists know that a particular kind of cell-to-cell communication, called Wnt/Beta-catenin signaling, regulates the fate of these as-yet undeveloped cells as an embryo forms. Through a cascade of signals, cells waiting for their calling learn which spot to t...

Jefferson researchers uncover new way nature turns genes on and off

...eep within the cells of fruit flies, developmental biologists at the Kimmel Cancer Center at Thomas Jefferson University in Philadelphia may have discovered a new way that genes are turned on and off during development. If they're right, and the same processes are at work in higher organisms, including mammals,...

Better sludge through metagenomics

...lifestyle. "The genome sequence will also enable biologists and engineers to understand why and how these organisms accumulate phosphorus, and it will lead to major advances in optimizing and controlling the EBPR wastewater treatment process," McMahon said. "In particular, it makes possible further research i...

Sandia research to focus on early detection of harmful algal blooms

...that could be fielded by oceanographers and marine biologists as part of their regular monitoring systems. In addition to Sandia's Lane and VanderNoot, collaborators include Donald M. Anderson, a senior scientist and director of the Coastal Ocean Institute, Woods Hole Oceanographic Institute; and Gregg Langlo...

Save the whales? Sure, but how many?

...here too few tigers in the world" Conservationist biologists grapple with the task of setting population targets for the species they are trying to protect ?a decision steeped in politics, emotion, and sometimes, science. In a new paper appearing in the journal Bioscience, the New York-based Wildlife Conserva...

UCSD study reveals how plants respond to elevated carbon dioxide

...pond to increasing atmospheric carbon dioxide. Now biologists at the University of California, San Diego have made significant advances toward understanding the mechanism plants use to regulate their carbon dioxide intake. The study, published in the May 1 early on-line edition of the journal Proceedings of t...

Scientists' cell discovery unearths evolutionary clues

... The York and Dundee teams have worked with field biologists in Germany, the US and Japan, and their research is published today (Friday 27th October 2006) in the prestigious international journal Science. The published paper shows for the first time the family tree of all known social amoeba species and th...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

...s and nanoelectronics. But in the last five years, biologists have become interested in employing it to characterize components of biological samples on a length scale of 100 nanometers or less. ''There's currently no way to do that,'' Boxer said. ''You can't get more multidisciplinary than something like this...

Tweedle coat fashions stocky flies

University of California, San Diego biologists have discovered that disruptions in genes they call Tweedles make fruit flies short and stout like Tweedledee and Tweedledum in Alice in Wonderland. They report in this week's issue of the journal Proceedings of the National Academy of Sciences that...

Fire ants: Their true story told by the scientist who loves them

...erparts. Between chapters science-rich enough for biologists but accessible to educated readers, "The Fire Ants" has "Interludes" ?wry asides on the pleasures and pitfalls as scientists measure and manipulate the ants they love (and that do indeed sting them). Tschinkel's anecdote on shelter is titled "There's...

Researchers find protein that silences genes

A team of researchers, including biologists at Washington University in St. Louis, has discove...f epigenetics. The Big Turn-Off For many years biologists thought that gene silencing in nucleolar dominance was a result of one set of ribosomal RNA genes be...

RNA found in the cellular centrosome of surf clams

...are modeled as simple versions of human cells, and biologists who study cell division value them for several reasons, according to Palazzo. The eggs develop fast, entering the process of cell division less than 15 minutes after fertilization, and, once fertilized, divide in synch every 30-50 minutes -- providin...

Fertility hope as study shows eggs survive in older ovaries

...my and Cell Biology, has sparked controversy among biologists and challenged the theory, held for more than 50 years, that female mammals are born with a finite number of oocytes (eggs). Two years ago, international researchers speculated that mice could continue to produce eggs throughout puberty and adultho...

New understanding of parasite cell structures may provide treatments for serious tropical diseases

...e transmission. Now, for the first time, cellular biologists at the University of Georgia have developed new tools to study and localize GPIs in living organisms and are discovering a new understanding of how they work in tropical parasites that cause human disease and suffering. The research was published in...

Discovery could aid fight against cystic fibrosis infection

...p1, into the Protein Data Bank, a resource used by biologists worldwide to find information about the proteins they are studying. While exploring the Protein Data Bank, Mougous, who was studying PA in the laboratory of department chair John Mekalanos, recognized that the amino acid sequence of Hcp1 in PA clo...

Major initiative proposed to address amphibian crisis

... all been implicated. In viewing this issue, some biologists have called amphibians the "canary in the coal mine" - the first clear and sweeping biological example of environmental change, pollution and toxicity that may ultimately affect many other animal species, including humans.The demise of amphibians als...

Scientific issues associated with carbon-neutral energy sources such as cellulosic ethanol

...ses for land, a central challenge for 21st century biologists is to increase the efficiency of solar energy capture to the theoretical limit by rational methods. In order to accomplish this we need to acquire and integrate all aspects of knowledge about plant biology into a systems level understanding that can...

Scientists take 'snapshots' of enzyme action

...onal Academy of Sciences. According to Brookhaven biologists Eswaramoorthy Subramaniam, the lead author, and Subramanyam Swaminathan, who led the research, most non-nutritional, foreign substances such as drugs and industrial chemicals are insoluble in water. The body uses two main groups of enzymes -- flavin-...

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