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Tag: "concentrated" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...fish. For the migrating wild salmon, the farm is a concentrated point source of infectious lice larvae. "We found lice levels exceeded what we would find normally, extending for 30 km ?even though the farm is only about 0.2 km long," says John Volpe, the third coauthor from the University of Victoria. "Conservat...

How an AIDS-Related Cancer Unleashes Inflammation

...said Ganem. In their studies, McCormick and Ganem concentrated on one protein called kaposin B, which was discovered in Ganem's laboratory, but whose function remained unknown. "The sequence of the kaposin B gene is very unusual; there's no homology to any known gene," said Ganem. "So, we had no clue as to what ...

UCSD medical/bioengineering reseachers show titanium debris satobtage artificial joints

...s, with small- and medium-sized titanium particles concentrated inside cells. Increased production of the protein RANKL by osteoblasts recruited and activated osteoclasts at the insertion sites, further weakening the bone. Larger titanium particles also activated metalloproteinases, which chop up the extracellula...

Stealth Worms May Improve Insect Pest Control

...sect pathogens. The misconception is that they are concentrated more in temperate zones, but this is not true. We're trying to unveil the mystery of nematode diversity in the tropic regions." In Jordan, she and her colleagues are surveying insect-parasitic nematodes from soil-inhabiting insects and other habitat...

Sugar beet virus mutation requires Texas touch

...cords for production and Minnesota boasts the most concentrated sugar beet growing region in the world, Rush said. Beet necrotic yellow vein virus, which causes the disease known as rhizomania, was found near Hereford in 1986 by a California researcher. A similar virus, beet soil borne mosaic virus, also was fou...

WHO suspends Marburg work, appeals for new funds

...ing the number of affected provinces to seven, all concentrated in the north-western part of the country. Mobile surveillance teams in Uige were forced to suspend operations yesterday when vehicles were attacked and damaged by local residents. As the situation has not improved, no surveillance teams were operati...

At the molecular level, the predator is the prey

...t. Tetrodotoxin (TTX), a powerful paralytic poison concentrated in the newts' skin, can bind to garter snake nerve cell channels and prevent sodium ions from flowing freely. "These channels are absolutely fundamental to every aspect of nerve and muscle function and are highly specific gateways for sodium ions," ...

Pair of cancer genes found to drive both cell migration and division

...at drives it, while cell division researchers have concentrated on the furrow within the dividing cell," says Devreotes. "But we've found that when you look at the whole cell, there are a lot of similarities between division and movement." In normal cells, the two genes work in tandem to regulate a molecule call...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

...ls are brought in with the horizontal currents and concentrated in the downwelling zone. The scientists say the ecological implications of the zooplankton's depth-keeping behavior carry far-reaching consequences for predatory fishes, whales and humans. Predators can dependably locate zooplankton aggregations by...

Anthrax inhibitors identified by Burnham team

...LF secreted by the bacteria, which is sufficiently concentrated in the bloodstream. LF enters cells and inactivates a human protein called "mitogen-activated protein kinase", or "MAPKK", disrupting the normal signaling pathways of the cell and inducing cell-death. Using a fragment-based approach based on assays ...

Thinking the pain away? Study shows the brain's painkillers may cause 'placebo effect'

...low researchers to inject their jaw muscles with a concentrated salt water solution to cause pain. The injection w...rs, the researchers slowly increased the amount of concentrated salt water being injected in the muscle as the scans continued, in order to keep the participants' r...

New imaging technology shown to detect pancreatic inflammation in type 1 diabetes

...er cells called macrophages. Thus, the MNPs become concentrated at the inflamed site and can be spotted by high-resolution MRI. In their recent study, the researchers applied the MRI-MNP technique to determine whether they could predict which mice would develop autoimmune diabetes and monitor the effectiveness ...

World-first technology enables study of ancient bacteria

...ethane that accumulates in "gas hydrates" ?a super concentrated methane ice that contains more carbon than all conventional fossil fuels and, therefore, a potentially enormous energy source. However, we know little about gas hydrates as they melt during recovery due to the fall in pressure. Professor R. John Par...

Progress on HIV/AIDS significant but insufficient

...ention efforts in countries where the epidemic was concentrated among very vulnerable populations, and tightening the bonds between sex, hygiene and procreation programmes. The round table devoted to treatment had reaffirmed the urgent need to expand treatment programmes, he said. Considerable difficulties still...

Prenatal exposure to marine toxin causes lasting damage

...h and crabs ingest the algae, the toxin can become concentrated in their bodies. Humans eating contaminated seafood develop symptoms including vomiting nausea, diarrhea and abdominal cramps. In severe cases, the toxin leads to neurological damage, characterized by headaches, confusion, coma and even death. Expo...

Russian 'surrogate' alcohols are a killer

...ol consumed in Russia. Its production was largely concentrated in the countryside. Samogon consumption is, of course, in addition to other alcohol surrogates such as eau de colognes, aftershaves, and medicinal compounds." "Our discussions with Russian colleagues suggest that [surrogate alcohols construe] a maj...

Scientists observe how a close bond activates the immune system

...ys Dr. Dustin. Researchers had speculated that the concentrated bull's eye structure somehow allowed T cells to maintain their state of activation. But the new work shows that it is actually the outer edge of immunological synapse that boosts activation, not the center. Dr. Dustin's group is now conducting addi...

Deep treasure to be found in Oculina Bank

...mp and scallops has damaged a large portion of the concentrated coral areas of these reefs over the past three decades. However, the remaining healthy reefs still support dense and diverse populations of more than 70 fish species and are critical breeding grounds for commercially important populations of gag and ...

Machinery of the 'marijuana munchies'

...docannabinoids. In their studies, the researchers concentrated on the lateral hypothalamus (LH) of the brain, known to be a center of control of food intake. Their studies involved detailed electrophysiological measurements of the effects of specific neurons that they had identified in previous studies as being ...

Researchers show how air pollution can cause heart disease

...thed doses of either particle-free filtered air or concentrated air containing PM2.5 at levels that averaged out to 15.2 micrograms per cubic meter. This amount is within the range of annual EPA limits and equivalent to air quality in urban areas such as New York City. The researchers then conducted an array of...

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