Tag: "size" at biology news

Chemical derived from vitamin-E shows early promise as cancer drug

...novel compound that resembles vitamin E halves the size of tumors and the ability of cancer to spread to other body sites. "We have clear evidence that this chemical is directly causing cancer cells to die," said Kimberly Kline, a nutrition professor in the Department of Human Ecology who directed the res...

Half-million dollar landmark achieved for the Methuselah Mouse Prize

..."This landmark contribution will further swell the size of the Prize, and encourage scientific research teams around the world to develop breakthrough techniques for extending the healthy human lifespan. It will create a needed impetus and focus for the development of new rejuvenation therapies." The Met...

Hidden diversity: DNA 'barcoding' reveals a common butterfly is actually 10 different species

...in the group known as A. fulgerator in an area the size of the greater Philadelphia area and as many as six species in a place no larger than the 262-acre Penn campus. "Given the vast range of the supposed A. fulgerator species, it doesn't take much imagination to realize that there are probably a great ...

Researchers devise potent new tools to curb ivory poaching

... and 41,000 small carved ivory cylinders about the size of hanko stamps, used for document signatures. The cylinders alone were worth more than $6 million. The new methods developed by Wasser's team can show generally where such ivory came from, alerting authorities to specific areas where added enforcem...

Groundbreaking research could ignite new solutions to heat transfer in nano-devices

...er measures the behavior of molecules in nanometer size spaces. Included among the research scientist authors is Timothy D. Sechler, an undergraduate student at The University of Scranton's Dexter Hanley College for adult students. "This project gave me the opportunity to see what my future would be like ...

Poplar DNA code cracked -- a step in combating global warming?

...es. Thus, the poplar - with the relatively limited size of its genome - serves as a model organism for trees. Populus trichocarpa has in fact 'only' 520 million base pairs (the DNA building blocks), which is about 50 times fewer than a pine tree. Then again, the poplar has four times as many DNA as Arabid...

Study explores gene transfer to modify underlying course of Alzheimer's disease

...ed atrophied (shrunken) brain cells to near-normal size and quantity and also restored axons connecting the brain cells, essential for communication between cells. In humans, loss of cholinergic cells correlates with dementia severity, the density of amyloid plaques (which are abnormal protein deposits in...

UAF scientists discover new marine habitat in Alaska

...m. "The biggest ones may have been about the size of a ping-pong ball, but many were smaller. They have lots of branches that come out of a centerpiece. They look like toy jacks, except they are pink. It was a very large bed, at least 60 meters (197 feet) long. It was very exciting." Konar and...

Green, leafy spinach may soon power cellphones and laptops

...ient, churning out a lot of energy relative to its size and weight. But combining biological and non-biological materials in one device has stymied researchers in the past. Biological materials need water and salt to survive-both are deadly for electronics. FROM WET TO DRY A new twist in the current...

Key stimulator of colorectal cancer identified

...E2 treatment induced an increase in the number and size of intestinal polyps. Importantly, this effect of PGE2 was not observed in these mice when they lack PPARd. "Our results identify PPARd as a critical downstream mediator in PGE2-stimulated promotion of colorectal tumor growth," says Dr. DuBois. "T...

Research suggests new avenue for stopping, preventing colon cancer

...e-cancerous intestinal polyps, both the number and size of polyps increased significantly, DuBois and his colleagues reported last February in Nature Medicine. The same mutation is found in 80 percent of patients with colorectal cancer. The findings suggest that drugs that activate PPARdelta "may encourag...

US investment firm gives away Rhode Island-sized lands in Chile

...ficant gifts of private land worldwide, due to the size of the land (approximately equal in size to the state of Rhode Island), the ecosystems it contains and their importance to conservation on a ...

Popular Science announces Third Annual 'Brilliant 10'

...erful enough to image a synapse--one-billionth the size of a grain of rice--he witnessed mouse neurons sprouting new branches in response to unfamiliar tasks, and saw new synapses appear. Svoboda's work contradicted the mainstream view that neural circuitry is fixed after childhood and may lead to methods...

Hardy buoys: Texas A&M project predicts oil spill movements

... who operate in the Gulf of Mexico. Buoys range in size from torpedo-shaped eight-foot long cylinders to circular-shaped ones, each floating on the water's surface. Prices of each range from about $30,000 to $200,000, depending on the sensors installed. A 2-cent-per-barrel tax on all oil transported in Te...

European common frog found to use novel mating strategy

...en four and 10 male frogs in a pond about half the size of an Olympic-size swimming pool. Since male frogs fertilize the female's eggs only after they're laid, there is no opportunity, as with animals that undergo internal fertilization, for more than one male to impregnate a female. And unlike the female...

Blue marlin in gulf have high mercury levels, A&M study shows

...y have higher mercury levels deals with the fish's size and feeding patterns. Although most blue marlin caught in the Gulf are approximately 200 to 400 pounds, some can weigh more than 1,000 pounds and can live up to 20 years, and because they are so large, they tend to eat larger than average fish, ones...

Hunting illusive signs of natural selection

...nentially, rapidly decreased to a small population size causing a bottleneck and then increased, where separated with only small amounts of interbreeding and split completely. The researchers, who included Shriver; Joshua M. Akey, Fred Hutchinson Cancer Research Center; Mark J. Rieder, Christopher S. Car...

Fossils reveal direct link between global warming and genetic diversity in wildlife

... Period. We found that they underwent a population size reduction and a decline in genetic diversity, which is what you would predict." But voles had a different response to medieval warming. "They didn't show any reduction in genetic diversity, even though they did show a reduction in population size," H...

In a world of distortion, archer fish learn to judge absolute size of aerial prey

...y judge from any underwater viewpoint the absolute size of their aerial prey. The work is reported by Stef...burg. Many animals are able to judge the absolute size of visual objects, a skill that becomes especially useful for tasks such as selecting prey. The abil...

Identifying tick genes could halt disease, bioterrorism threat

...out the tick genome, which is about two-thirds the size of the human genome, Hill said. Many animals and plants have similar genes with similar functions, but ticks have some unique genes different even from other invertebrates. With a better understanding of the deer tick, researchers hope to learn much ...

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