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Tag: "feat" at biology news

Electric fish conduct electric duets in aquatic courtship

...ey video recorded four pair of mating mormyrids (a feat in itself, since the species rarely breeds successfully in captivity) and identified nine common motor displays and 11 specific pulse sequences common to courtship and mating. "Knowing the electrical and motor patterns during courtship allows for ...

Rare cell prevents rampant brain activity

...te of equilibrium. Just how the brain manages this feat is a puzzle to scientists. Scientists at Karolinska Institutet and the Brain Mind Institute in Switzerland have now discovered a mechanism that might explain how the most common type of neuron in the cerebral cortex ?the pyramid cell ?is prevente...

Tibetan antelope slowly recovering, WCS says

...traversed the entire northern Chang Tang region, a feat that hadn't been accomplished in over a century, when in 1896 two British army officers made the journey on horseback, according to Schaller. Forsaking horses this time, Schaller's expedition used two Land Cruisers and two trucks -- one of which was...

Bacterial walls come tumbling down

...tural structure. They then were able to repeat the feat to reveal the crystal structure of the enzyme combined with the animal antibiotic. Their findings help reveal how the enzyme prepares to assemble the bacteria's sugar-coating by plucking sugars from a fat-sugar package known as lipid II. The antib...

The connector rotation hypothesis? Phage do not pack their DNA by rotation

... shell (the capsid). How it manages this intricate feat has been subject to debate, but we know that the DNA passes into the capsid shell through a channel formed by a structure called the connector. Scientists have speculated that rotation of the connector complex might feed the DNA into the capsid as it...

Who gives stem cells their marching orders?

... seemingly identical stem cells is a truly awesome feat of nature. As they bathe in a chemical soup they've manufactured themselves, stem cells react to subtle changes in chemical concentration, moving apart and taking on distinct identities. The million-dollar question: How do these cells ?all initially ...

Researchers identify new weapon to fight deadly bacterial sepsis

...s. Moreover, the scientists have accomplished this feat using a chemical compound very similar to a diabetes drug already in stage three clinical trials in the United States, the final level of human experimentation before a drug is considered for federal licensing approval. If those diabetes trials p...

Biofuel cells without the bio cells

...rgy's Pacific Northwest National Laboratory. The feat is the bacterial equivalent of removing lungs and coaxing the disembodied tissue to breathe. Squier and principal authors Yijia Xiong and Liang Shi, PNNL staff scientists, discovered that the proteins, outer membrane c-type cytochrome A, or OmcA, f...

Getting to the heart of the heart

...s, recently got heart muscle cells to replicate, a feat that normally occurs only during embryonic development and represents another approach to repairing injured heart muscle. By apparently stimulating tissue regeneration, he was also able improve heart function after a simulated heart attack. ...

Genetic tug of war determines sexual differentiation

...f a testis. "We found that Sry accomplishes this feat by triggering still another gene, the Sox9 gene. Sox9 activates the Fgf9 gene which blocks Wnt4 and initiates a cascade of events leading to the development of a testis," said Blanche Capel, Ph.D., senior member of the international research team. "I...

Mitochondrial DNA sequencing tool updated

...scientists in England performed the then-Herculean feat of sequencing the complete human mitochondrial genome. The genome consisted of 16,568 base pair, or units, of DNA and encoded 37 contiguous genes. But because of the balky sequencing tools of the day and their high cost, much of the subsequent rese...

Berkeley researchers lay groundwork for cell version of DNA chip

...ell. Chandra and his co-authors accomplished this feat through the adaptation of a technique, developed earlier by Bertozzi and her research group, called the "Staudinger ligation." Bertozzi's Staudinger ligation utilizes the sugar complexes called "oligosaccharides" that reside on the surface of every ...

Plant-derived vaccines safeguard against deadly plague

Through an innovative feat of plant biotechnology and vaccine design, researchers in the Biodesign Institute at Arizona State University have successfully turned tobacco plants into vaccine production factories to combat the deadliest form of plague. The vaccine elicits a prot...

'Genetic network' guards against lethal DNA damage

... combination with the 5,000 non-essential genes, a feat approximately equivalent to 370,000 gene-pair tests. The Hopkins team used a technology known as dSLAM (heterozygote diploid-based synthetic lethality analyzed by microarray) to look at the effects of 5,000 different double mutations on cell fitness...

Researchers unravel DNA tangles and enzyme seamstresses

...zymes called topoisomerases. How they achieve this feat may be simpler than previously thought, says U of T research. In a study published in the current online issue of Biophysical Journal, researchers used computer simulations to mimic the DNA mess inside the nucleus with a series of billions of linked ...

Rare Tibetan antelope listed as endangered

...nal ultrasound probes use just 64 cables. "It's a feat of technology and craftsmanship to build these devices," Smith said. "More cables translate into better image quality. The scanners achieve a 3D moving image instantaneously, with no reconstruction." Each cable carries electrical signals from the sc...

3D ultrasound device poised to advance minimally invasive surgery

...nal ultrasound probes use just 64 cables. "It's a feat of technology and craftsmanship to build these devices," Smith said. "More cables translate into better image quality. The scanners achieve a 3D moving image instantaneously, with no reconstruction." Each cable carries electrical signals from the sc...

Gene therapy may protect normal tissues during radiation retreatment for lung cancer

...ing each ice age. 'Either way it is an impressive feat against the odds as the extreme cold means that these animals respond much more slowly to the destruction of their habitat than elsewhere in the oceans. They have lower metabolic rates that lower their growth and reproductive rates. Elsewhere in the ...

Seafloor creatures destroyed by ice action during ice ages

...ing each ice age. 'Either way it is an impressive feat against the odds as the extreme cold means that these animals respond much more slowly to the destruction of their habitat than elsewhere in the oceans. They have lower metabolic rates that lower their growth and reproductive rates. Elsewhere in the ...

Digging in the dirt for life's biochemical foundations

It seems a mighty feat for a microscopic fungus built from threadlike filaments. But collectively, these spindly mushroom relatives help move several billion tons of nutrients out of the soil and into plants each year. Now, new Michigan State University-supported research ...

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