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Tag: "defined" at biology news

Implantable pumps extend lives of patients too sick for transplant

...rmining which patients are optimal will need to be defined by future clinical trials, he said. The other challenges pertain to the limitations of LVAD technology. "Like most new technologies, we're limited by our power supply," Rogers said, "We need to develop a battery that is not only small enough and pow...

Bacteria which sense the Earth's magnetic field

...on oxide. The crystals also have to have a exactly defined number, form, and size, in order to be effective magnetic field sensors. To function optimally, the magnetosome crystals have to be strung into a straight chain inside the cell, thereby summing their magnetic moments. Only such a chain structure allo...

Mouse genome much more complex than expected

... evident that mammal genes do not have any clearly defined limits.' ...

Researchers find Amchitka seafood safe for now

...pletely as has any previous single-year study of a defined marine area." In fact, the university consortium ...to reach out to affected Aleut communities as they defined their scientific plan and then included Aleuts on the expedition itself to aid in collection of samp...

Female butterflies go for sparkle -- not size -- when choosing to mate

...ing strong sensitivity to a set of rather narrowly defined features, such as eyespot pupils that measure approximately half of one millimeter. The most conclusive finding resulted when the researchers painted the white pupils in male eyespots on the dorsal side with a plant extract, rutin, which maintained ...

Color perception is not in the eye of the beholder: It's in the brain

...r perception. These experiments show that color is defined by our experience in the world, and since we all share the same world, we arrive at the same definition of colors." Williams' team is now looking to identify the genetic basis for this large variation between retinas. Early tests on the original vol...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...ll provide new directions for understanding poorly defined processes in humans, such as maturation," he says. "This has been shown over and over again, where people have done studies in the fly and it later has been shown that similar genes work much the same way in humans." Thummel studied the role of the ...

Scientists find a maturity gene in fly

...ll provide new directions for understanding poorly defined processes in humans, such as maturation," he says. "This has been shown over and over again, where people have done studies in the fly and it later has been shown that similar genes work much the same way in humans." Thummel studied the role of the ...

Stem cells bring fast direct improvement, without differentiation, in acute renal failure

...er said. "Specifically, these as yet incompletely defined paracrine actions of MSC result in the renal downregulation of proinflammatory cytokines IL-1-beta, TNF-alpha, and IFN-gamma, as well as iNOS (inducible nitric oxide synthase), and upregulation of anti-inflammatory and organ-protective interleukin-10...

Visceral Leishmaniasis: Successful Vaccine Trial In Dogs

...nd Lemesre J.L. (1999). Leishmania Spp: completely defined medium without serum and macromolecules (CDM/LP) for the continuous in vitro cultivation of infective promastigote forms. Am. J. Trop. Med. Hyg., 60 (1), 41-50. Brevets : Lemesre J.L. (1993). "Procédé de culture in vitro de différents stades parasita...

Researchers propose measures to curb lion attacks in Tanzania

... first steps towards proving its claims by growing defined liver tissue using the new cell type. By making use of special NASA-derived technology, the team is able to cultivate greater numbers of cells in equipment mimicking the effects of space microgravity. "Using Synthecon's bioreactors, originally design...

Insight into the processes of 'positive' and 'negative' learners

... first steps towards proving its claims by growing defined liver tissue using the new cell type. By making use of special NASA-derived technology, the team is able to cultivate greater numbers of cells in equipment mimicking the effects of space microgravity. "Using Synthecon's bioreactors, originally design...

Researchers make 'embryonic-like' stem cells from umbilical cord blood

... first steps towards proving its claims by growing defined liver tissue using the new cell type. By making use of special NASA-derived technology, the team is able to cultivate greater numbers of cells in equipment mimicking the effects of space microgravity. "Using Synthecon's bioreactors, originally design...

The synapse is a shotgun

... volleys of neurotransmitter are launched from one defined region of the sending neuron to another defined target on the receiving neuron. In contrast, the new data suggest that synapse can act like a shotgu...

Structures of marine toxins provide insight into their effectiveness as cancer drugs

...d their Italian colleagues. The research team has defined the structure of the toxins and provided a basic understanding that can be used to synthesize pharmaceuticals, according to a study published this week in the Proceedings of the National Academy of Sciences (PNAS). "We've determined how this class o...

Beyond genes: Lipid helps cell wall protein fold into proper shape

...f simple compounds. "The next goal now that we've defined the phenomenon is to get into the specifics, find the mechanisms by which these proteins fold. What part of the protein interacts with the lipid, and what part of the lipid with the protein?" said Dowhan, who holds the John S. Dunn Sr. Chair in Bioch...

Malfunctioning bone marrow cells sabotage nerve cells in diabetes

... experiments in diabetic rats and mice. Their work defined the role of the aberrant cells in causing neuropathy. They found that, in diabetes, only nerve cells that have fused with bone marrow cells display the abnormal function and premature death found in neuropathy. Nerve cells that have not merged with...

Major advance made on DNA structure

...imensional structure of different types of DNA are defined by those sequences, and, ultimately, how that defines biological function. "There can be 400 million nucleotides in a human chromosome, but only about 10 percent of them actually code for genes," said Pui Shing Ho, professor and chair of the OSU Dep...

Researchers develop new method for facile identification of proteins in bacterial cells

... fragments based on the time they need to travel a defined distance when being accelerated in a vacuum. In their study, Rolf U. Halden, PhD, PE, assistant professor in the Department of Environmental Health Sciences Bloomberg School of Public Health and his colleagues demonstrate how PMF and mass spectromet...

Male Combat Veterans Rank High In Heart Disease Risk

...Public Health in Chapel Hill. Heavy drinkers were defined as those who reported consuming 14 or more servings of beer, wine or hard liquor a week. Heavy smoking was determined by calculating the subjects' pack-years smoked (the number of years smoking multiplied by the number of packs smoked per day) and di...

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