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Tag: "described" at biology news

Mice with glowing hearts shed light on how hearts develop

...oncentration of calcium ions rise within cells, is described online at http://www.pnas.org/papbyrecent.shtml and is to be published in a future issue of Proceedings of the National Academy of Sciences. "The proteins act as molecular spies that tell us what is happening within cells in the living mouse," sai...

Resveratrol prolongs lifespan and delays onset of aging-related traits in a short-lived vertebrate

...s with a captive lifespan of only three months was described by Cellerino and colleagues. In the new work, the researchers used this short-lived fish to test the effects of resveratrol on aging-related physiological decay. The researchers added resveratrol to daily fish food and found that this treatment incre...

Virginia Bioinformatics Institutes launches microbial database

...ences. The VBI Microbial Database (VMD), which is described in a recent article published in Nucleic Acids Res...o researchers in one integrated resource. The work described in the paper was completed by Brett Tyler, VBI research professor and professor of plant pathology, ...

Poison dart frog mimics gain when birds learn to stay away

...asin where the famous naturalist Henry Bates first described mimicry in butterflies over 100 years ago. His theory, known as Batesian mimicry, describes how edible species can gain protection from predators by looking like toxic species. ...

Mayo Clinic researchers challenge sepsis theory

...me -- only the bacterial poison cause -- which was described by a 19th century researcher as "the putrid gift." "Our work is the first to show that this change in receptors in the body is the first true step in the sepsis syndrome, rather than the introduction of a poison," explains Dr. Platt. "The importance...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

...rullo, M., 1999, Sea Soup, p. 14). The oldest described species in the register is from 1753, a green alga...o science are five species of flatworms which were described in 2003. Recent and planned exploration of the New England Seamounts may yield new species, but mos...

Scientists discover dozens of new species in 'Lost World' of western New Guinea

...d of Berlepsch's Six-Wired Bird of Paradise. First described in the late 19th century through specimens collected by indigenous hunters from an unknown location on New Guinea, the species had been the focus of several subsequent expeditions that failed to find it. On the second day of the recent month-long ex...

Outsmarting the smartie bug

...ecently announced by the Department of Health ?are described by a team led by scientists from the Wellcome Trus... USA. Current research, such as the capsule study described here, is intended to ensure we keep ahead of organisms such as S. pneumoniae. ...

Some like it hot: Worms at deep-sea vents favor a fiery 45-55°C

...hat thrive around deep-sea vents. The research is described this week in the journal Science. Authors Peter R. Girguis of Harvard University and Raymond W. Lee of Washington State University studied Paralvinella sulfincola, a member of the Alvinellidae family of worms dwelling at ocean depths of some 2,200 ...

'Genetic network' guards against lethal DNA damage

...rt in the March 10 issue of Cell, the Hopkins team described a genetic network that is necessary for ensuring genomic stability in yeast. This study also identified previously unrecognized genes critical for maintaining DNA integrity and novel functions for well-known genes. "A lot of human diseases are cause...

High-resolution light microscope reveals the fundamental mechanisms of nerve communication

...tion, whose resolution-limiting effects were first described by Ernst Abbe in 1873. Abbe observed that structures which were closer to each other than ~200nm could not be visually separated when observed using visible light; when viewed through the optical microscope they are perceived as a blurred, single ent...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...ound. The discovery of the oldest tyrannosaurs is described in the journal Nature on Feb. 9. Erickson co-authored the paper with seven scientists from China, the United States and Canada. Until now, tyrannosaurs such as T. rex were best known from the end of the Cretaceous period, about 65-70 million years a...

Neuroscientists discover new cell type that may help brain maintain memories of smells

...ber of a group of previously unstudied brain cells described by the Spanish neuroanatomist Blanes (pronounced blon ?es) in the late 1800s. Blanes cells have unusual properties which may help the brain maintain memories of smells and also opens a new approach to understanding the basis of memory impairments in...

Molecule by molecule, new assay shows real-time gene activity

...in probing genetic activity. Using the new assay, described this week in the journal Science, researchers led ...m, or stochastic, bursts of protein expression are described in detail in a separate paper Xie and colleagues present this week in Nature. "Although central to ...

Why nerve cells work faster than the theory allows

...952, Alan Lloyd Hodgkin and Andrew Fielding Huxley described in a mathematical model how such an action potential originates on the basis of measurements on neurons of the squid. The Hodgkin-Huxley model, for which the scientists later received the Nobel Prize, has since then served to explain the signal proc...

Laos ?a lost world for frogs

...reatens much of Laos's wildlife. Already, a newly described salamander species found by Stuart in Laos has turned up earlier this year in the Japanese pet trade, where it is commanding a high commercial price. This species is currently known only from two, nearby localities in northern Laos. Conservationists...

New cellular flaw found in some virulent breast cancers

...action of a certain mutated oncogene and the newly described growth control flaw is seen in about 10 percent of breast cancers ?and the deadliest ones. The cancer results from a cascade of molecular events. The overproduction of a common protein, cyclin D1, hyperstimulates a growth switch, CDK4 kinase, causin...

Gene therapy 'turns off' mutation linked to Parkinson's disease

...lopment of Parkinson's disease. The gene therapy, described in the January online issue of the journal Experimental Neurology, was designed by Martha Bohn and her laboratory group at Northwestern University Feinberg School of Medicine. Bohn is Medical Research Council Professor and director of the neurobiol...

Novel molecular 'signature' marks DNA of embryonic stem cells

...mise of embryonic stem (ES) cells for medicine. As described in the April 21 issue of Cell, the researchers have discovered unique molecular imprints coupled to DNA in mouse ES cells that help explain the cells' rare ability to form almost any body cell type. These imprints, or "signatures," appear near the ma...

New University of Toronto research a 'pore' excuse for engineering

...and interfering, with each other. But the PMO film described in this study acts as a better insulator and would take up far less room, allowing components to shrink even further. "Industry is always looking for a better insulator," Hatton says. "This is an example of how materials chemistry can provide innovat...

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