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Tag: "biologists" at biology news

Study: Predatory dinosaurs had bird-like pulmonary system

... have been structured. Birds long have fascinated biologists because of their unusual pulmonary system. Pulmonary air sacs prompt air to pass through the lungs twice during ventilation. This system also creates holes in the skeleton of birds, which has led to a popular notion that birds have "air in their bone...

IBM Transforms the Art of Scientific Expeditions

...to begin growing again in mice, said the radiation biologists from the Duke Comprehensive Cancer Center. Each therapy alone had limited or no benefit on the tumor, because tumors are skilled at circumventing individual therapies and finding new ways to grow. But together, the two therapies more potently inhibi...

'Sinkers' provide missing piece in deep-sea puzzle

... animals in the deep sea get enough to eat. Marine biologists at the Monterey Bay Aquarium Research Institute (MBARI) recently published a paper that helps answer this question, at least for animals that live on the deep seafloor off the coast of Central California. After analyzing hundreds of hours of deep-sea...

Duke Experiments Boost Radiation's Cancer-Killing Effects

...to begin growing again in mice, said the radiation biologists from the Duke Comprehensive Cancer Center. Each therapy alone had limited or no benefit on the tumor, because tumors are skilled at circumventing individual therapies and finding new ways to grow. But together, the two therapies more potently inhibi...

Expanding forests darken the outlook for butterflies, study shows

...s the results of his study can inform conservation biologists in Europe to help them save their butterflies. As for protecting the butterflies in the Canadian Rockies, Roland would like to see more prescribed burning of forests to increase the number and size of alpine meadows. However, unlike the park areas, ...

Public collections of DNA and RNA sequence reach 100 gigabases

... resources have anticipated the needs of molecular biologists and addressed them - often in the face of a serious lack of resources." David Lipman, Director of the National Center for Biotechnology Information, adds: "Today's nucleotide sequence databases allow researchers to share completed genomes, the genet...

Scientists devise way to measure RNA synthesis on the fly in a live cell

...ter announcing the completion of the human genome, biologists have realized that the DNA sequence wasn't enough ...es throughout the cell that produce proteins. Some biologists have recently begun to identify families of RNA molecules that also play a major role in determining...

'Punctuated' evolution in the human genome

... chromosome has intrigued evolutionary and primate biologists for years because it appears to have formed from the fusion of two mid-sized ape chromosomes, and it is the primary cytogenetic distinction separating humans and their evolutionary progenitors. Within this 700 Kb region of human chromosome 2, the re...

Drawing with DNA: 'Bioart' illuminates genomics

On any given day, tens of thousands of biologists around the globe run DNA sequences of unknown function through a lightning-fast online algorithm called BLAST ?typically submitting 200 to 400 base pairs, or "letters" of genetic code, to be matched against the billions of letters for known genes. Se...

Size matters: Preventing large mammal extinction

...inked to the extinction of mammals. "Conservation biologists have always known that large bodied mammals are at greater risk of extinction," comments Professor Georgina Mace of the IoZ, "Now we understand the mechanisms, we are able to tailor conservation programmes dependant on size, to ensure they're more ef...

Harmless virus may hold key to more effective HIV drug discovery

...elopment of HIV and anti-viral drugs, UCI chemical biologists have found. In order to better identify compounds that can outmaneuver a virus' effort to mutate and multiply, Gregory Weiss and Allison Olszewski employed this virus, called a bacteriophage, to learn how a HIV protein could respond to a new class o...

Tufts researchers shine light on firefly mysteries

...a darkened meadow west of Boston, Tufts University biologists are continuing to shine new light on the frenzied love life of fireflies. For the first time, researchers will explore the question of whether male fireflies' flashing light ?previously shown in one species to indicate superior physical and genetic ...

Decisions, decisions: Male or female?

... decide whether to be sperm or eggs Johns Hopkins biologists have determined how developing embryos tell their specialized "germ cells" whether to develop into a male's sperm or a female's eggs. Present in both male and female embryos, germ cells are the precursors to both sperm and eggs. Unable to "decide" o...

New tool reveals secrets of migrating cells

... fields of biology to track migrating cells, which biologists have discovered are common in many types of tissue, ranging from nerves to lymph nodes. To date, such long-range migrations have been inferred from observations of chemically fixed tissue at different stages of development. "Two-photon imaging is go...

Biologists determine genetic blueprint of social amoeba

An international team that includes biologists at the University of California, San Diego has det...lood cells. Three years ago, another team of UCSD biologists discovered that two genes that are used by Dictyostelium to guide the organism to food sources are a...

Discovery of an American salamander where it shouldn't be: Korea

...'ve largely gone extinct." That doesn't mean that biologists won't find more lungless salamanders in wet areas of Europe and Asia. Wake himself is eager to go to Korea and to the nearby Shandong area of China to look for more. He continues to be amazed at the new amphibian species being discovered - an increas...

Caloric restriction won't dramatically extend life span in humans: UCLA research

... and beyond, as many have speculated, evolutionary biologists report. "Our message is that suffering years of misery to remain super-skinny is not going to have a big payoff in terms of a longer life," said UCLA evolutionary biologist John Phelan. "I once heard someone say caloric restriction may not make you ...

IMF Launches World’s First DNA Database for Myeloma Patients

..., and there is a significant cadre of evolutionary biologists studying this field because genital shape ?morphology ?is one of the chief characters that taxonomists use to distinguish between closely related species. Striking diversity Researchers have thought for about 20 years that the striking diversity of...

Certain fish have a special mating preference

..., and there is a significant cadre of evolutionary biologists studying this field because genital shape ?morphology ?is one of the chief characters that taxonomists use to distinguish between closely related species. Striking diversity Researchers have thought for about 20 years that the striking diversity of...

Researchers reveal secret of key protein in brain and heart function

Brown University biologists have solved the structure of a critical piece of synapse-associated protein 97 (SAP97) found in abundance in the heart and head, where it is believed to play a role in everything from cardiac contractions to memory creation. Results are published in ...

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