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Tag: "cycle" at biology news

UCI scientists reconstruct migration of avian flu virus

...f different H5N1 strains lets the virus infect and cycle through different host species in a region, regardless of the host or vector species it infects first. This way, the virus can find the right host to spread the infection to the next location. This parallel evolution ?the independent evolution of sim...

Sandia researchers take new approach to studying how cells respond to pathogens

...says. "We wanted to look at cells in the same life cycle and same infectious state. This can only be done cell by cell. We also want to study populations, but one cell at a time." The research is possible because of advances in several Sandia-developed tools, including: Microfluidics that allo...

Fish extinctions alter critical nutrients in water, study shows

...se of the food chain, for example, rely on fish to cycle back into the water such nutrients as nitrogen and phosphorus, which are otherwise locked up in animal or plant cells. Fish excrete dissolved nutrients back into the water, making them available to algae, which need them to grow. The study, publish...

Researchers wake up viruses inside tumors to image and then destroy cancers

...roteasome inhibitor, but it also induces the lytic cycle thereby activating the TK in the Epstein-Barr viru...the tumor mass needed to be induced into the lytic cycle in order to be detected. Not only can FIAU light up the tumors, it can also potentially kill them...

To sleep, perchance to dream: New insight into melatonin production

... our bodies' circadian rhythm (the roughly-24-hour cycle around which basic physiological processes proceed). Normally, melatonin production is inhibited by light and enhanced by darkness, usually peaking in the middle of the night. Melatonin's expression pattern is mimicked by a protein called AANAT, whi...

Genome of yellow fever/dengue fever mosquito sequenced

...rategies that efficiently disrupt the transmission cycle or enhance existing strategies. The Ae. aegypti genome sequence is expected to stimulate efforts to elucidate interactions at the molecular level between mosquitoes and the pathogens they transmit to humans. ...

Scientists discover new life in the Antarctic deep sea

... versa. The research findings suggest the glacial cycle of advance and retreat of ice led to an intermingling of species that originated in shallow and deep water habitats. Lead author Professor Angelika Brandt from the Zoological Institute and Zoological Museum, University Hamburg says, "The Antarc...

Parasites' impact goes beyond host to affect ecosystem

...L. littorea is just one of three hosts in the life cycle of C. lingua, which first lives in the snails?gona... turn eaten by the snails. "The parasite’s life cycle is a really amazing strategy for an organism that doesn’t have a brain," says Byers, who predicts th...

An ancient bathtub ring of mammoth fossils

...lowly reform creating a new Lake Missoula, and the cycle would repeat. The huge volumes of water swept overland from present-day Spokane to the Tri-Cities, creating a distinct geological region known as the Channeled Scablands. The only outlet for this tremendous outpouring was a southern ridge-opening ...

Amphibians in losing race with environmental change

...interest because their physiology and complex life cycle often exposes them to a wider range of environmental changes than other species must face ?they have permeable skin, live on both land and water, their eggs have no shells. In the face of these challenges, amphibians appear to be losing the battle...

A cherry on top: Tart cherries may alter heart/diabetes factors

...tabolic syndrome ?and because it feeds the vicious cycle of increased cholesterol and decreased response to insulin that can lead to cardiovascular disease and Type 2 diabetes. Meanwhile, the measure of PPAR messenger RNA in the liver reflects the readiness of the liver tissue to express functional PPAR...

An 'elegant' idea proves its worth 25 years later

...aved an estimated 80 percent of patients with urea cycle disorders --- most of them children – according to...nts in large doses to make up for the missing urea cycle enzyme they inherited," says Ada Hamosh, M.D., M.P.H, clinical director of the McKusick-Nathans Inst...

Research finds that circadian rhythms dominate all life functions

...g. Circadian rhythms are biological rhythms that cycle over a period of about 24 hours and regulate timing for most physiological functions and behaviors such as sleeping, eating and activity. As a checks-and-balances procedure, Ptitsyn analyzed the sets of data with several mathematical approaches to ac...

Marine phytoplankton changes form to protect itself from different predators

...elled organism that plays a key role in the carbon cycle of cold-water oceans may be a lot smarter than sci...e Phaeocystis blooms play a key role in the carbon cycle of cold oceans, accounting for up to 85 percent of local productivity during some time periods. Thi...

Now, self-healing materials can mimic human skin, healing again and again

...crack reopens under additional stress, the healing cycle is repeated. “Ultimately, the ability to achieve further healing events is controlled by the availability of active catalyst,” said Kathleen S. Toohey, a U. of I. graduate student and lead author of the paper. “While we can pump more healing agent ...

Salty oceans provide early warning for climate change

...nificant climate change, altering the hydrological cycle and affecting atmospheric circulation patterns too. Currently there is no large-scale salt monitoring system in place in the southern hemisphere oceans. Zahn thinks that regular measurements taken in the waters around South Africa and New Zealand...

Dirty snow may warm Arctic as much as greenhouse gases

...apidly than snow, causing additional warming. This cycle causes temperatures in the polar regions to rise as much as 3 degrees Celsius during some seasons, the scientists say. “Once the snow is gone, the soot that caused the snow to melt continues to have an effect because the ground surface is darker a...

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