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Tag: "too" at biology news

PNAS study reveals why organs fail following massive trauma

...ck the invader at hand. Unfortunately, lymphocytes too are capable of mistakenly destroying human cells. Thus, they have developed quality control mechanisms where they can choose to stop expanding into an army (anergy) or to commit suicide (apoptosis). The PNAS study offers new evidence that an overwh...

Cigarette smoking impedes tendon-to-bone healing

... to interfere with healing, Galatz says it's still too early to tell. "We would have to look much more closely to learn exactly what the mechanism is, but blood supply is a potential culprit," she says. "Nicotine and cigarette smoking inhibit the formation of new blood vessels, and basically, all heal...

Mars mission Risk 29: Scientists research ways to reduce radiation-induced brain damage

...ding a spacecraft from all radiation could make it too heavy to reach Mars, which, at its closest, is 38 million miles from earth. Now, medical scientists have been tasked to determine the human brain's maximum safe cosmic radiation dose and to decipher precisely how radiation causes cognitive impairme...

Too mellow for our predatory world

...ation resumes. "But changes in flight distance are too slight and insufficient", says Roedl. "We were able to capture the same animals up to six times in four weeks." It is therefore not very surprising that the introduction of cats and dogs has dramatically reduced the population of marine iguanas on so...

Technology for monitoring fetal oxygen during labor offers no apparent benefit

... in the birth canal, or from the baby simply being too large.) Because the results of that earlier study were inconclusive, the U.S. Food and Drug Administration, which approves new medical devices for safety and effectiveness, granted only provisional approval for fetal oxygen saturation monitoring u...

Researchers discover new gene responsible for brittle bone disease

...y gene that instructed their bodies to make either too little or weak collagen because of defects or mutations in one of the collagen genes, of which there are more than 20. The current study found a new gene, that when mutated, reduces the ability of a protein involved in collagen formation, called CRTA...

Humpback whales have brain cells also found in humans

...rge brain size of baleen whales suggests that they too have a complex and elaborate evolutionary history. Patrick R. Hof and Estel Van der Gucht of the Department of Neuroscience at Mount Sinai School of Medicine in New York, NY, examined the brain of an adult humpback whale and compared it with the b...

A new understanding of how cells defend themselves against bacterial pore-forming toxins

...physiology," notes Van der Goot. If a cell absorbs too much water, for example, this pathway would be triggered. The lipids formed in the metabolic pathway would enable the cell to enlarge its membrane to accommodate the extra water. "Toxins have co-evolved with their hosts for a long time," says Van ...

Researchers reveal mystery of bacterial magnetism

... heading up the mountain, keeping her from heading too far in the wrong direction. And the stronger the ...ientists was that the affect of being magnetic was too small for them to measure in the earth's natural, but weak, magnetic field. "Therefore," concludes ...

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

...nd the scent trails. The openings in the grid were too small for the star appendages to squeeze through b... the grid was replaced with a screen with openings too small for the air bubbles to pass through, however, the moles' performance dropped down to the level...

A giant among minnows: Giant danio can keep growing

... it is easy to raise and maintain. But the fish is too tiny for physiological research. So the researchers were interested in finding a close zebrafish relative to allow them to do physiological research while drawing on the knowledge base of the zebrafish genome. The researchers saw the giant danio as...

Fragmentation rapidly erodes Amazonian biodiversity

...Laurance, “so none of us expected things to change too fast. But in just two decades—a wink of time for a thousand year-old tree—the ecosystem has been seriously degraded.? The main driver of these changes, say the authors, is ecological changes near the margins of forest fragments. “When you fragmen...

MIT creates 3-D scaffold for growing stem cells

... Other synthetic polymer biomaterials are simply too big. Getting cells to grow on them is like forcing spiders to build webs on skyscraper girders. Zhang's nanofiber scaffold, around 1,000 times smaller than the existing systems, is much closer in size to the extracellular matrices that living cells m...

A transplant in time

...n be most successfully transplanted. Tissues taken too early, when they are still fairly undifferentiated, may form tumors, while those taken too late can be identified as foreign, causing the host to reject them. By taking spleen tissue fro...

Mayo Clinic collaboration mining of ancient herbal text leads to potential new anti-bacterial drug

...se that illness or affliction should not be halted too quickly; and some considered this medicament a great secret, and relied on it completely."...

Sandia research to focus on early detection of harmful algal blooms

... "Today's standard detection methods, frankly, are too slow and labor-intensive," said Lane. "By the time the process is complete, it's too late: the shellfish beds are already toxic." The ability to quickly sample organisms low on the food...

Protein shown to rally biological clock

...like the marshal that prevents he cells from being too active. Herzog and Aton recorded neuron activity from the SCN using a multielectrode array with 60 electrodes upon which they place SCN cells, a “clock in a dish.? They also recorded gene expression in real-time using a bioluminescent reporter of ...

Save the whales? Sure, but how many?

...zly bears should call Yellowstone home" Are there too few tigers in the world" Conservationist biologists grapple with the task of setting population targets for the species they are trying to protect ?a decision steeped in politics, emotion, and sometimes, science. In a new paper appearing in the jou...

Trotting with emus to walk with dinosaurs

...e "like working with a bunch of kindergarteners on too much sugar," he said. That left emus, which are perfect: three toes, the right size, and relatively easy to work with. What's more, there is an emu ranch handily located in nearby Colorado at which Breithaupt and his team could reconnoiter and le...

MIT nanoparticles may help detect, treat tumors

...ck together. The resulting nanoparticle clumps are too big to get back out of the gaps. Further, the clumps have a stronger magnetic signal than do individual nanoparticles, allowing detection by MRI. "We inject nanoparticles that will self-assemble when they are exposed to proteases inside of invasive...

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