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Tag: "packed" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...ected." The anchored farms, open cages of closely packed salmon, are aquatic feedlots providing the ideal conditions for the breeding and spread of sea lice amongst the adult fish. For the migrating wild salmon, the farm is a concentrated point source of infectious lice larvae. "We found lice levels excee...

New RNA polymerase discovered in plants

... Pol IV subunits are knocked out, the most tightly packed DNA in the nucleus becomes less condensed, small RNAs called siRNAs corresponding to highly repeated 5S rRNA genes and retrotransposons (jumping genes) are completely eliminated and DNA methylation at 5S genes and retrotransposons is lost. Methylati...

Hopkins AIDS experts issue warning about global efforts to provide drug therapies

... researchers argue that the history of medicine is packed with examples of immediate demand for new therapies outstripping supply. They also point out that rationing of supplies was necessary in all cases, but that public distrust and outrage arose when patient selection methods conflicted with local princi...

Deep thinking: Scientists sequence a cold-loving marine microbe

...ly code for adaptive traits such as cell membranes packed with polyunsaturated fatty acids that resist freezing, polyester compounds that offer extra energy reserves, protective solutes inside cells, and ordinary enzymes altered to function in chilly seawater. "Our goal was to compare C. psychrerythraea to...

VCU study shows hormone-like molecule kills cells that cause inflammation in allergic disease

...7; treatment." According to Ryan, mast cells are packed with granules containing histamine and are present in nearly all tissues except blood. When mast cells are activated, inflammatory substances such as histamine, heparin and a number of cytokines are rapidly released into the tissues and blood, promot...

Climate model links higher temperatures to prehistoric extinction

...7; treatment." According to Ryan, mast cells are packed with granules containing histamine and are present in nearly all tissues except blood. When mast cells are activated, inflammatory substances such as histamine, heparin and a number of cytokines are rapidly released into the tissues and blood, promot...

Otter adaptations: How do otters remain sleek and warm

...que adaptations; namely, their fur and the densely packed layer of specially adapted underhairs. Using scanning electron microscopy and polarizing light microsopy, John W. Weisel, PhD, Professor of Cell and Developmental Biology at the University of Pennsylvania School of Medicine, and colleagues, examined...

Genome Sequence for Haemophilus Influenzae Completed

...que adaptations; namely, their fur and the densely packed layer of specially adapted underhairs. Using scanning electron microscopy and polarizing light microsopy, John W. Weisel, PhD, Professor of Cell and Developmental Biology at the University of Pennsylvania School of Medicine, and colleagues, examined...

'Underground' tunnels discovered as means for communication between immune system cells

...rconnecting molecular bridges that conjoin tightly packed cells - are known to generate calcium signals and transport other molecules between cells, the researchers say the tunneling nanotubules are something quite different. "This is clearly a third form of intercellular communication, distinct from gap j...

Computers close in on protein structure prediction

... atoms on top of each other. It's about as densely packed as it could be. It's like a three-dimensional jigsaw puzzle." The researchers upped their odds of finding the right match by repeating the two-step process with 50 homologs of the proteins from other genomes, such as a mouse or fly. The protocol was...

New discovery blurs distinction between human cells and those of bacteria

...shows a repeating pattern of six protein molecules packed closely together. "We didn't know six would be th...arly fill the space; what struck me is how tightly packed they are. That tells us the shell plays an important role in controlling what comes in and goes out....

Nighttime Dying Linked To Sleep Apnea From Brain Cell Loss

...shows a repeating pattern of six protein molecules packed closely together. "We didn't know six would be th...arly fill the space; what struck me is how tightly packed they are. That tells us the shell plays an important role in controlling what comes in and goes out....

Field tested: Grasslands won't help buffer climate change as carbon dioxide levels rise

...shows a repeating pattern of six protein molecules packed closely together. "We didn't know six would be th...arly fill the space; what struck me is how tightly packed they are. That tells us the shell plays an important role in controlling what comes in and goes out....

New molecule may aid in production of biofuels and fungi-resistant plants

... is an insoluble molecule that consists of tightly packed chains of polymerized sugars," explains study author Dr. Vincent G. H. Eijsink of the Norwegian University of Life Sciences. "It is synthesized by different crustaceans, mollusks, algae, insects, fungi and yeasts and is a major structural component o...

University of Delaware researchers develop cancer 'nanobomb'

...ty of conditions." Explosions in air of loosely packed nanotubes have been seen before in an oxygen environment, creating ignition. However, the work reported by Panchapakesan uses the localized thermal energy imbalance to set off explosions that are intrinsic in nature. Panchapakesan said the nanobom...

3D ultrasound device poised to advance minimally invasive surgery

...rent advance relies on 500 tiny cables and sensors packed into a tube 12 millimeters in diameter ? the size required to fit into surgical instruments, called trocars, that surgeons use to allow easy exchange of laparoscopic tools. By comparison, most two-dimensional ultrasound probes use just 64 cables. "I...

Rare Tibetan antelope listed as endangered

...rent advance relies on 500 tiny cables and sensors packed into a tube 12 millimeters in diameter ? the size required to fit into surgical instruments, called trocars, that surgeons use to allow easy exchange of laparoscopic tools. By comparison, most two-dimensional ultrasound probes use just 64 cables. "I...

UC Berkeley researchers create a biologically-inspired artificial compound eye

...tegrate microlens arrays ?thousands of tiny lenses packed side by side ?with self-aligned, self-written wave...topped with its own lens. Not only are these units packed together in the same hexagonal, honeycomb pattern as in an insect's compound eye, but each is also r...

Evolutionary biology research techniques predict cancer

In diverse ecosystems, packed with wildly different species, evolution whizzes along. As different species accumulate mutations, some adapt particularly well to their environment and prosper. It happens in marine sediments, mountain forests ?and, as a new study illustrates, in pr...

Researchers create pigs that produce heart-healthy omega-3 fatty acids

In diverse ecosystems, packed with wildly different species, evolution whizzes along. As different species accumulate mutations, some adapt particularly well to their environment and prosper. It happens in marine sediments, mountain forests ?and, as a new study illustrates, in pr...

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