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Tag: "dead" at biology news

Engineer ramps up protein production, develops versatile viral spheres

...artz says. Most vaccines today work by introducing dead or weakened copies of viruses, mixed with other chemicals, into the bloodstream with the hope that they will provoke a strong, albeit general, response by the immune system. The process is akin to advertising a product to a random audience and hoping...

Human stem cells delay start of Lou Gehrig's disease in rats

...s a comparison, the researchers injected rats with dead human stem cells, which would not affect disease p...fter injection, whereas control rats injected with dead stem cells started losing weight at 52 days and lived for 75 days after injection. The rats were...

Extraordinary life found around deep-sea gas seeps

...so had extensive shell beds consisting of live and dead shells of various types of clams and mussels. These were fringed with stands of another type of deep-sea tube worm that is also gutless and relies on symbiotic bacteria for its nutrition. Corals and, at two of the sites, numerous sponges, were also o...

Brain protein improves stroke symptoms in rats, even when injected after 3 days

...the stroke, which is identified by the presence of dead neurons. In this model, the animals were injected with a single dose of G-CSF at 60µg/kg body weight four hours after the stroke. The researchers demonstrate that the size of the affected area is reduced by 34.5% in the rats that received G-CSF four ...

Study: Living coral reefs provide better protection from tsunami waves

...rom destructive tsunami waves than do unhealthy or dead reefs, a Princeton University study suggests. In...fer the coast at least twice as much protection as dead reefs. The finding provides the first quantitative confirmation of a widely held theory regarding th...

Coral reefs are increasingly vulnerable to angry oceans

...s overfishing, which can deplete the fish that eat dead coral and keep the reef clear for the next generation of corals. "Regardless of whether we think of more severe storms as a looming threat or just the ramping up of a natural cycle, one thing is certain," said Connolly. "To predict how coral ree...

Mayo Clinic study suggests that a central nervous system viral infection can lead to memory deficits

...astation, was directly correlated to the number of dead brain cells in the hippocampus region of the mouse's brain. Picornaviruses infect more than one billion people worldwide each year. Generally individuals contract two or three enterovirus and/or rhinovirus infections each year. In some cases the v...

Fragmentation rapidly erodes Amazonian biodiversity

...inforest trees they replaced. The carbon from the dead rainforest trees is broken down by microbes and fungi to become carbon dioxide, the most important greenhouse gas. “Fragmentation is affecting the forest in a lot of ways,?said Laurance. “These changes occur remarkably fast, and when you comple...

Stormy days ahead for coral reefs

..., which can deplete the fish that eat seaweeds and dead coral and keep the reef clear for the next generation of corals. "Regardless of whether we think of more severe storms as a looming threat or just the ramping up of a natural cycle, one thing is certain," says Dr Connolly. "To predict how coral...

Ground spider diversity studied in research project

..." For people who think the only good spider is a dead spider, Henderson has this to say: A diverse spider population signifies a healthy habitat. Spiders "help maintain the balance of nature," said Dr. John Jackman, Texas Cooperative Extension entomologist in College Station, "They help keep a lid on ...

Targeted virus compels cancer cells to eat themselves

... and had no detectable brain tumors. Analyses of dead cancer cells showed telltale signs of autophagy: bits of virus in the cell nucleus and autophagic vacuoles -- cavities with residual digested material. The cells showed no sign of having been killed by apoptosis -- a much better known process of pr...

Tamed 11,400 years ago, figs were likely first domesticated crop

...figs do not produce seeds, they are a reproductive dead end unless humans interfere by planting shoots from the parthenocarpic trees. "Once the parthenocarpic mutation occurred, humans must have recognized that the resulting fruits do not produce new trees, and fig tree cultivation became a common practi...

A surprise about our body clock

...at bone marrow cells have the ability to clear the dead tissue after a heart attack, what has not been known until now is the critically important role of bone marrow adult stem cells in repairing a damaged heart, restoring its function and enhancing the growth of new blood vessels. "These cells act like...

Healing the heart with bone marrow cells

...at bone marrow cells have the ability to clear the dead tissue after a heart attack, what has not been known until now is the critically important role of bone marrow adult stem cells in repairing a damaged heart, restoring its function and enhancing the growth of new blood vessels. "These cells act like...

Bone marrow may restore cells lost in vision diseases

...erly faced no hope of growing new cells to replace dead ones. Then, in the late 1990s, when scientists began to report findings of brain cell growth in humans and monkeys later in life, focus turned toward understanding the mechanisms to regenerate cells in the brain. Now, UF researchers believe it may ...

Movie spies on malaria parasite's sneaky behavior

...ered one of the parasite's sneakiest tricks--using dead liver cells to cloak and transport itself back int...most destructive. How the parasites direct the dead liver cell to form the merosome structure and how that bag eventually bursts open in the blood are q...

Federal testing for mad cow disease a failure, law review editor says

...aughterhouse practice of "rendering," or recycling dead cows and sheep into protein for cattle feed, is be...idence that feeding herbivorous cows the meat from dead animals can lead to the formation of abnormal proteins, or prions. The prions attack a cow's brain ...

Invasive species alter habitat to their benefit

...ils had higher nutrient levels and heavier mats of dead cattail stems than areas with only native wetland ...ails; in the second she added litter---the mats of dead stems that accumulate around hybrids. A third plot received both live hybrids and litter, and the fo...

Fish virus in Northeast spreading to other fish species

... St. Lawrence River. Last week, an estimated 1,000 dead fish washed up on the shores of Lake Ontario in ju...ee to five days. Groocock said the high number of dead fish reported recently may be due to the increased presence of vacationers on the lakes in summer, a...

Insect predation sheds light on food web recovery after the dinosaur extinction

...lants and insects. The Western Interior U.S. was a dead zone for plants and plant-insect food webs," said Dr. Peter Wilf, assistant professor of geosciences and the David and Lucile Packard Fellow. "We know that right after the extinction, for 800,000 years, there was very low insect predation and plant ...

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