average 2 10

Tag: "average" at biology news

Picking particles faster than one at a time

... with the background." By first establishing the average gray-scale range of the particles of interest, contrast can be maintained while the fine texture of the background is smoothed out. The smoothed-out background is then subtracted. The next steps involve a procedure called segmentation, developed by...

Stress substantially slows human body's ability to heal

...oup of 42 married couples who had been together an average of at least 12 years. Each couple was admitted into the university's General Clinical Research Center for two, 24-hour-long visits. The visits were separated by a two-month interval. During each visit, both the husband and wife were fitted with a s...

Bees solve complex colour puzzles

... vision needs to do is adapt itself to the scene's average colour, a bit like adapting to the darkness of a c...ghts simultaneously, since adapting to the scene's average colour - which was previously thought to be the strategy used by bees - won't work." "Our study sho...

Superconducting magnet attracts molecular research

...nd motion of biological molecules in solution. The average hospital-based MRI has an electromagnetic field of about 7 Tesla, while this superconducting magnet is more than twice as powerful, measuring a magnetic field of 18.8 Tesla, said Pochapsky. "Brandeis has done pioneering work in structural biology ...

Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect

... rate, seawater full of CO2 droplets would have an average density smaller than that of surrounding seawater, creating conditions that could lead to a rapidly-rising plume. Problems also could occur if the injection device malfunctioned, producing larger droplets. "An even safer injection scheme would be to...

How the neuron sprouts its branches

... surface area about ten thousand times that of the average cell. So, it was an entirely open question where all the membrane components came from to generate the complex surface of growing dendrites. And we thought these remote structures we had discovered in dendrites called Golgi outposts might play a role...

In SAD patients, autumn antidepressants can prevent winter depression

... The patients, 70% of whom were women, reported an average of 13 previous episodes of fall-winter depression. Notwithstanding this long history, almost 60% of patients had received no previous treatment for their episodes of depression. The researchers attempted to prevent the development of fall-winter de...

USC researchers track down the stem cells that create feathers

...wice a year. With more than 20,000 feathers on the average bird, Chuong notes, that means there are a lot of active, ongoing regenerative events in an adult bird. Chuong and his USC colleagues identified epithelial stem cells within a chicken-feather follicle by giving the chickens water containing a non-ra...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...htly warmer than freezing and such microbes should average about one every cubic centimeter, or about 16 per cubic inch. While Price is not expecting any time soon a mission to Mars to drill several hundred meters beneath the surface, methanogens (methane-generating Archaea) could just as easily be detected...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

...e lamprey will feed for about a year, consuming on average 40 pounds of fish. In the Great Lakes, their prey have been commercially valuable species like lake trout and whitefish. Currently, the Great Lakes Fishery Commission (GLFC) controls lamprey by means of a poison that kills lamprey larvae in streambe...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

...e lamprey will feed for about a year, consuming on average 40 pounds of fish. In the Great Lakes, their prey have been commercially valuable species like lake trout and whitefish. Currently, the Great Lakes Fishery Commission (GLFC) controls lamprey by means of a poison that kills lamprey larvae in streambe...

Implantable pumps extend lives of patients too sick for transplant

...hers found that patients who received LVADs had an average survival time of 10.3 months, compared to 3.1 mont...ceived the device and 18 did not. Patients were on average of 59 years old and as a group their hearts beat at only 14 percent of normal strength. The pump tes...

Marathon of nano-sprinters

...alculate several transport properties, such as the average velocity and the average walking distance of the cargo particle as a function of the maximum number of motors that can pull t...

Carnegie Mellon scientists create PNA molecule with potential to build nanodevices

...e advances of the modern age may have extended the average human life span, it is clear there are genetic limits to longevity. One prominent theory of aging lays the blame on the accumulation of damage done to DNA and proteins by “free radicals,?highly reactive molecules produced by the metabolic activity of...

Navigating the brain for sense of direction as paradigm for higher cognitive functions

...e advances of the modern age may have extended the average human life span, it is clear there are genetic limits to longevity. One prominent theory of aging lays the blame on the accumulation of damage done to DNA and proteins by “free radicals,?highly reactive molecules produced by the metabolic activity of...

Gene Expression in the Aging Brain

...e advances of the modern age may have extended the average human life span, it is clear there are genetic limits to longevity. One prominent theory of aging lays the blame on the accumulation of damage done to DNA and proteins by “free radicals,?highly reactive molecules produced by the metabolic activity of...

Is it Possible to Change Prescribing Habits?

... not just monetary: those who have an ADE spend on average 8?2 days longer in the hospital than patients who do not have an ADE, and their admission costs $16,000 to $24,000 more. One way for hospitals to tackle the problem of medication errors is to install computerized monitoring systems, which can reduce...

Researchers show how air pollution can cause heart disease

...regulated PM2.5 since 1997, limiting each person's average exposure per year to no more than 15 micrograms per cubic meter. These tiny particles of dust, soot, and smoke lead to an estimated 60,000 premature deaths every year in the United States. Dr. Chen and his colleagues divided 28 mice, which were gen...

Older female fish prefer imperfect male mates, study finds

...urrent study on human attraction, for example, the average age of the females and males tested for preference...nternal prototype of an object that is based on an average of all the male fish [the females] have seen," Morris said. "Therefore, any fish they see that is cl...

Cattle grazing may help rather than hurt endangered species

...ing reduced the duration of wetland flooding by an average of 50 days per year. Their simulations show that climate change could compound these impacts, potentially, leaving endangered fairy shrimp and tiger salamanders without enough time to mature before their temporary aquatic environments disappear. "C...

1 2 3 4 5 6 7 8 9 10