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Tag: "thought" at biology news

Advance helps explain stem cell behavior

...ely lead to cures or treatments for conditions now thought to be incurable. "You can't attempt to cure a disease or repair a problem if you don't know what molecular players are involved," Gross said. "That's what we're moving towards. We now have a better idea of some of the key components in this process...

Dragonfly's metabolic disease provides clues about human obesity

...e associated with a chronic inflammatory response, thought to be triggered by an accumulation of fat. __IMAGE_2 In Marden and Schilder's dragonflies, the reverse happens. Parasitic infection triggers an inflammatory response and immediate changes in metabolism. Unable to metabolize fat, the dragonfli...

How brain injury leads to seizures, memory problems

...ance. The resulting abnormal activity, in turn, is thought to be an underlying reason for seizures and memory defects experienced by people who have suffered a traumatic brain injury (TBI). "A traumatic brain injury occurs to someone in the United States every 23 seconds," said study team leader Akiva S. Co...

To elude bats, a moth keeps its hearing in tune

...ns attached to a small eardrum. Previously, it was thought that these ears were only partially sensitive to the sound frequencies commonly used by bats, and it would seem likely that by using high ultrasound, bats would make their hunting calls inaudible to moths. However, as now reported by James Windmill a...

Quality not quantity important for immune response to HIV

...trol of the virus." About 40 million people are thought to be living with HIV worldwide. The virus, which causes AIDS, is thought to kill 3 million people each year. Despite being first identified in 1981, a vaccine to prevent inf...

Therapeutic role found for carbon monoxide

...nce before life began on earth and, in fact, it is thought to have contributed to the origin of life. Perhaps this was a sign of its necessary role in biology." ...

Batfish to the rescue!

...us, which is comparatively rare on the GBR and was thought to feed only on invertebrates. The event surprised the scientists in two ways, he says. First, it showed that the species one would normally expect to "mow the weeds" may make little impression on a heavily-overgrown reef, dashing researchers' ho...

Getting to the heart of the heart

...ial cells. Since these different cell types were thought to have separate ancestors, the studies offer a ne...rd Stem Cell Institute. "Previously, it had been thought that each cell type in the heart had a different origin. Now, it's pretty clear that some have commo...

Oldest animal fossils may have been bacteria

...ery "complicates our understanding of microfossils thought to be the oldest animals," said lead author Jake B...howed evidence of reductive cell division. Then he thought again about the phosphorite deposits. "When I put those two pieces together, I said ?perhaps they'...

Humpback whales have brain cells also found in humans

...pback cerebral cortex, the part of the brain where thought processes take place, was similar in complexity to...The large area of cortex found in these mammals is thought to be related to acoustic capabilities and the current study shows that it is organized into a syste...

Singing for survival

... Because gibbons are unusually monogamous, it is thought that sexual selection is the main evolutionary mechanism for the evolution of gibbon song. The researchers concluded, "Vocal behaviour appears to function as a powerful tool to deal with immense sexual competition under which these primates operate...

Contrary to common wisdom, scientist discovers some mammals can smell objects under water

...althy mammals have been doing something heretofore thought impossible -- using the sense of smell under water. The results of the research by Vanderbilt's Kenneth Catania, assistant professor of biology, were reported Dec. 21 in the science journal Nature. He became curious when he observed that a mole he w...

Chemotherapy temporarily affects the structures of the human brain

...her cognitive abilities. Although chemotherapy was thought not to affect brain cells due to the blood-brain barrier, recent clinical studies have confirmed declines in cognitive functions in patients receiving chemotherapy. Animal studies have shown physical changes in the brain and in neurons caused by chem...

Hard-wiring the fruit fly's visual system

... the adult animal to see normally. It is generally thought that the complexity of visual maps, like other brain regions, cannot only be genetically programmed but requires activity by neurons or nerve cells in the brain. In a new study published in the journal Current Biology, Drs. P. Robin Hiesinger, R. G...

Researchers use multiphoton microscopy to watch chromosomes in action

...rs bind to hsp70 genes much longer than previously thought before being replaced with new HSFs, which raises new questions about the mechanisms of gene transcription. The technique also may offer a new tool for researchers across the biological sciences. Webb says it marks the success of an interdisciplinar...

Recurrence of a flu pandemic similar to infamous 1918 flu could kill 62 million

...e high income world. Very few strategies are being thought through that are primarily targeting poor countries." For many decades, published epidemiological literature assumed that mortality rates from the 1918-20 pandemic were distributed fairly equally. A simple population count from that period would l...

Why Popeye only has eyes for spinach

...ula. This yellow oil, called macular pigment, is thought to protect the macula from age-related macular degeneration or AMD, a disease that studies in the UK have shown to affect up to 12% of men and 29% of women over the age of 75. "The macula is a small area of the retina responsible for seeing detail ...

Most widely used organic pesticide requires help to kill

...ercent of mortality in the United States. "It is thought that the gut is the source of bacteria for a large portion of cases of human septicemia, so if this mechanism is shared by Bt and toxins produced by human pathogens, the implications could be far greater in medicine than in agriculture," Handelsman s...

Detecting explosives with honeybees

...ntifically unproven. With more knowledge, our team thought we could make use of this ability.? The team that Haarmann put together began with research into why bees are such good detectors, going beyond merely demonstrating that bees can be used to identify the presence of explosives. By looking at su...

Steep oxygen decline halted first land colonization by Earth's sea creatures

...dictated how other organisms' bodies developed. He thought that perhaps, rather than being based on feeding a...ciency. For instance, a mollusk shell is typically thought of as protection for the marine creature, he said, but it turns out the shell actually channels wate...

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