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Tag: "feeding" at biology news

Penn researchers link cell's protein recycling systems

...r. “Then when we activated the autophagy system by feeding the flies a drug called rapamycin, neurodegeneration was prevented.” The accumulated misfolded proteins were cleared out by the lysosome system. “Then we knew that this system can compensate for the impaired proteasome function, which in itself tells...

Marine phytoplankton changes form to protect itself from different predators

...ainst attack by predators that have very different feeding habits. To boost its survival chances, Phaeocysti...as attacking, and this shift suppressed either the feeding or growth and reproduction of the consumer to which they were responding.” The role of this phyto...

Hawaiian treasure, macadamia nuts good for the heart

...r tree nuts." The researchers used a controlled feeding study to compare a heart-healthy diet with 1.5 ounces ?a small handful ?of macadamia nuts to a standard American diet. The participants had slightly elevated cholesterol levels, normal blood pressure and were not taking lipid lowering drugs. Research...

Pistachios lower cholesterol, provide antioxidants

...nducted a randomized, crossover design, controlled feeding experiment to test the effects of pistachios added...on cardiovascular disease risk factors. Controlled feeding experiments provide all the food eaten by study subjects for the duration of the study segment. ...

Why do oysters choose to live where they could be eaten?

...ame species. Yet, death for a larvae captured by a feeding adult is nearly certain at greater than 90 percent. A series of experiments examining the feeding currents produced by adult oysters and how larvae actively settle on reefs helped solved the puzzle....

Survival of the rarest: Fruit flies shed light on the evolution of behavior

...r larvae move around more than sitter larvae while feeding and they are also more likely to explore new food patches than sitters. The researchers explored the evolutionary mechanism that favours the persistence of both of these types in nature. Doctoral student Mark Fitzpatrick raised colonies of flies w...

Thymus transplants gives hope to babies with fatal immune disease

...doing what other babies her age are doing -- she's feeding herself, putting on her own clothes and she loves to dance." Lolita Harding is describing her daughter Dave'yana, who will turn three in September, thanks in large part to a thymus transplant she received at Duke University Medical Center in April 2...

Dinosaur hearing, listening to muscle noise, quieter cubicles

.... Transients, which also distinguish themselves by feeding primarily on other marine mammals such as seals, r...ocal when feeding, these results suggest that more feeding occurred at night when it is not possible to observe them visually. This acoustic information is a v...

Scientists seek useful traits in wild cottons

...ause severe crop damage resulting in yield loss by feeding on the emerging leaves of cotton seedlings. Those ...gs, a secondary pest of cotton, and confines their feeding to certain parts of cotton plants using bug cages. The amount of damage they inflict on cotton fruit...

Bats get the munchies too!

...measured in fruit bat breath declined faster after feeding on fructose-containing food, than when the food contained either sucrose or glucose (two other types of sugar). Furthermore when the amount of ethanol in food increased the fruit bats preferred food which contained fructose over glucose-containing fo...

Leeches ferry infection among newts

...d releases its endospores onto the mouthparts of a feeding leech. Their findings are outlined in the January ... tissue instead of blood. A leech would have to be feeding right on top of a newt's infected muscle in order to transmit the infection. However, it is still un...

Whiteflies and plant viruses can help each other to speed up biological invasion

...gher fecundity and longevity by 12 and 6 fold when feeding on plants infected by one virus, and by 18 and 7 fold when feeding on plants infected by another virus. Population density of the B whitefly on virus-infected plants r...

Gene found for rare disorder may reveal new pathway in mental retardation

...ental retardation, impaired growth, heart defects, feeding problems, deformed upper limbs and distinctive facial features. In the current study, mutations in two genes of interest cause mental retardation, but with less pronounced facial features and none of the limb defects, such as missing hands or fing...

Scientists find genes involved in the battle between Hessian flies and wheat

... how the flies feed and why they can't establish a feeding site on plants that are resistant to the larvae. ...ss includes starvation when they can't establish a feeding site. The larvae also are under stress from toxic molecules, including poisonous oxygen compounds." ...

Power-boosting signal in muscle declines with age

...MPK-stimulating chemical, chronic exposure through feeding of another chemical that induces AMPK by mimicking an energy shortage, and exercise. In every case, older rats showed a decline in AMPK activity compared to younger animals. Young rats infused with a stimulatory chemical showed an increase in mus...

Tracking sperm whales and jumbo squid

...sheries, many aspects of their lifestyle—including feeding and hunting—are as mysterious today as they were w...ese data show that sperm whales don’t change their feeding behavior, day or night," Davis explained. "Instead, they keep going down to about 1,300 feet, whethe...

How appetite-stimulating brain cells work overtime during fasting

...lls' increased excitability and consequent rebound feeding by the animals following food deprivation. "Our...." The findings emphasize the complexity of the feeding circuitry, which once "seemed so simple," wrote Charles Mobbs of Mount Sinai School of Medicine in a...

Insomnia drug can improve brain function

...ependent, unable to speak or walk, and was using a feeding tube for nourishment, although she was able to understand single words. Two years after the suicide attempt, she was given zolpidem for a bout of insomnia; 20 minutes later, she was able to communicate to her family, eat by herself, and move. These e...

Ancient amphibians evolved a bite before migrating to dry land

...s would be a less precise means of determining the feeding methods of extinct species, Markey says. "Analysis of the sutures of the early amphibian species Acanthostega revealed that, while it had many adaptations to an aquatic lifestyle, it was more likely a biter than a sucker," Markey says. "The analy...

Scripps research team discovers a chemical pathway that causes mice to overeat and gain weight

...tter understanding of the role of EP3 receptors in feeding and obesity could lead to the development of treatments that could prevent or reverse these conditions. Along with Sanchez-Alavez and Bartfai, Izabella Klein, Sara Brownell, Iustin Tabarean, Christopher Davis, and Bruno Conti, all of Scripps Rese...

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