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Intermittent in Biological News

The way you eat may affect your risk for breast cancer

... people." Previous studies have shown that intermittent calorie restriction provided greater protection ... two calorie restriction methods chronic and intermittent and tumor development beginning in 10-week old ... mammary tumors. Their hope was to explain why intermittent restriction is more effective. The overall ...

Arctic climate under greenhouse conditions in the Late Cretaceous

... New evidence for ice-free summers with intermittent winter sea ice in the Arctic Ocean during the Late Cretaceous a period of ... sediment within the diatom ooze are consistent with the presence of intermittent sea ice in the winter, a finding that supports "a wide body of evidence ...

Green tea compounds beat OSA-related brain deficits

... deprived of oxygen during 12-hour night cycles, mimicking the intermittent hypoxia (IH) that humans with OSA experience. People with OSA have ... the researchers divided 106 male rats into two groups that underwent intermittent oxygen depletion during the 12-hour night cycle for 14 days. One group ...

Translating the conversation between the brain and blood vessels

... of hypertension (high blood pressure). Her Medical College of Georgia laboratory studies the links between conditions such as obesity and the chronic intermittent hypoxia that happens in sleep apnea and chronic activation of the sympathetic nervous system. "We're studying why people who are obese become ...

Mighty diatoms: Global climate feedback from microscopic algae

... often happens in roiling oceans, diatoms evolve larger to store nutrients for lean times. Deep mixing also benefits large diatoms. Depending on how intermittent the nitrate supply is and how deep the ocean mixes, there can be a wide range of diatom sizes. Size matters for the creatures that eat them and also ...

February 2009 Geology and GSA Today media highlights

... a shorter-term process that affects the deposition of ice and dust at the poles, perhaps similar to the way the El Nio Southern Oscillation produces intermittent changes in Pacific Ocean temperatures and rainfall. Perron and Huybers do not rule out the possibility that the layers they observe are part of an ...

Tilting at wind farms

... Journal of Power Electronics . Wind power is being touted as a clean and inexhaustible energy source across the globe, but the wind is intermittent and so the power output of wind farms can be variable. Proposed measures to smooth these power fluctuations usually involve the installation of units ...

Arctic sea ice thinning at record rate

... is changing as well as the extent of the ice. "As the Arctic ice pack is constantly moving, conventional methods can only provide sparse and intermittent measurements of ice thickness from which it is difficult to tell whether the changes are local or across the whole Arctic," Giles said. ...

Scientists learn how food affects the brain

... brain molecules and synapses," Gmez-Pinilla said. "We are trying to find the molecular basis to explain this." Controlled meal-skipping or intermittent caloric restriction might provide health benefits, he said. Excess calories can reduce the flexibility of synapses and increase the vulnerability ...

Growth hormone's link to starvation may be clue to increasing life span, researchers find

... normally controls. Interfering with the actions of growth hormone has been shown to increase life span in mice, Dr. Kliewer said. "In addition, intermittent fasting which increases FGF21 concentrations also extends life span in mice. This raises the intriguing possibility that FGF21 might be a ...

TAU announces new 'supercenter' for renewable energy

... change the very way we use energy like the hyper-efficient batteries being developed at Tel Aviv University for storing and transporting energy from intermittent sources such as wind and sun. TAU Prof. Amram Eshel is growing desert plants for use as a renewable fuel, using marginal lands and reclaimed ...

Will intensive forest practices impact water quality?

... subset was not. Unfertilized streamside buffers of at least 15 m, consistent with Texas best management practices (BMPs), were retained on all intermittent and perennial streams. Clearcutting with herbicide site preparation alone resulted in slight increases of nitrogen on small watersheds but not on ...

Wind power explored off California's coast

... to link wind farms to further exploit economies of scale and thereby reduce the cost of wind energy. Interconnecting multiple parks can offset the intermittent nature of wind and make it a more dependable source of energy, the authors said. And, like the wave-energy project, it would be cheaper to have an ...

The power of multiples: Connecting wind farms can make a more reliable - and cheaper - power source

... that, if interconnected wind is used on a large scale, a third or more of its energy can be used for reliable electric power, and the remaining intermittent portion can be used for transportation, allowing wind to solve energy, climate and air pollution problems simultaneously, said Archer, the studys ...

MU study finds that sitting may increase risk of disease

... standing can double the metabolic rate. Hamilton believes that scientists and the public have underestimated common activities because they are intermittent and do not take as much effort as a heavy workout. To hold a body that weighs 170 pounds upright takes a fair amount of energy from muscles, ...

Canadian Society of Exercise Physiology Annual Scientific Conference

... age, Friday, November 16, 2:15 to 3:15 p.m. Physical Adaptations to High Intensity (elite athlete) Interval Training Debates whether intense, intermittent exercise training is better than traditional training for performance enhancement, Friday, November 16, 2:30 to 5:30 p.m. Whole Body Vibration ...

How schizophrenia develops: Major clues discovered

... Schizophrenia may occur, in part, because of a problem in an intermittent on/off switch for a gene involved in making a key chemical messenger in the brain, scientists have found in a study of human brain tissue. The ...

Just like us, social stress prompts hamsters to overeat, gain weight

... weight and fat in hamsters? If so, how many defeats are necessary? Do intermittent (unpredictable) defeats increase fat and food intake more than consecutive ... in a foreign cage consecutively (at regular times). However, while the intermittent group increased on all measures of fat gain, the consecutive group ...

Freeze-dried mats of microbes awaken in Antarctic streambed

... Dry Valleys an analogue for Mars because of its inhospitable climate and intermittent water flow. "This was something we did not anticipate," said McKnight, ... Aug. 7 to Aug. 12 in Montreal. The river channels under study feature intermittent streams that link glaciers to frozen lakes on the valley floor, she said. ...

Flies don't buzz about aimlessly!

... Scale-free movement patterns have been found in diverse animals including zooplankton, wandering albatrosses, jackals, and even human hunter-gathers. intermittent searchers include octopi, graylings, and mating crickets. Andy Reynolds says, "Our results with freely flying Drosophila appear to be the first ...

Proteins important in Alzheimer's, Parkinson's disease travel in the slow lane

... unique aspects of slow-protein transport. He found that the "slow" proteins actually showed rapid bursts of movement followed by pauses. This intermittent transport behavior of individual cargoes made the overall population slow and suggests that fast and slow proteins use the same basic mechanisms for ...

Therapeutic role found for carbon monoxide

... also be used to treat and reverse existing disease. "Our results offer the exciting possibility that in extremely low concentrations and for brief intermittent exposures of one hour per day, CO gas might be effectively used as a therapy to treat PAH in a clinical setting," says Otterbein, an investigator in ...

Natural pine bark extract relieves muscle cramp and pain in athletes and diabetics

... The second study involved 47 participants with diabetic microangiopathy (a disorder of the smallest veins commonly associated with diabetes), or intermittent claudication (a blood vessel disease that causes the legs to easily cramp).This study also used a two-week pre-trial observation period followed by a ...

First demonstration of 'teaching' in non-human animals

... them gets too small, the leader accelerates and the follower decelerates. It is as if the leader is towing the follower but the process is highly intermittent because the follower is dictating the speed of the lesson by stopping frequently to consolidate its growing knowledge of the path that it has taken. ...

Travelers can avoid jet lag by resetting their body clocks

... slightly more sleepy in the evenings after taking the pill. Therefore, the researchers recommend using the 0.5 dose in combination with morning intermittent bright light to advance their sleep schedule. "The findings are very practical," said Dr. Eastman. "A business person could go to a pharmacy ...

Naturally occurring asbestos linked to lung cancer

... "Like smoking, exposure to asbestos appears to be very dose-dependent," Beckett said. "Day-in, day-out occupational exposures are more dangerous than intermittent exposures in the community. But the more you can do to reduce your personal exposure, the safer you will be." While the overall mesothelioma rate ...

HIV Therapy Greatly Extends Life of Key T Cells, Scientists Find

... associated with various side effects, IL-2 is licensed to treat certain cancers. NIH researchers have long observed that in responsive patients, intermittent cycles of IL-2 therapy lead to substantial increases in the number of circulating CD4+ cells. The mechanisms driving this increase as well as its ...

Gray wolves maintain the food chain in winter

... for ravens, eagles, coyotes, bears, and other scavengers. Altogether, their modeling studies show that shorter winters without wolves will create intermittent food supplies that no longer track the needs of local scavengers. With or without wolves, late-winter carrion abundance will decline with shorter ...

Bioartificial kidney under study at MCG

... doctors may opt for newer continuous dialysis therapies in which patients with renal failure receive dialysis around the clock. With more standard intermittent therapy, patients get several hours of dialysis three to four times a week. Since kidneys are constantly working, it may seem logical that longer ...
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