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Tag: "raising" at biology news

DNA from feathers tells tale of eagle fidelity

...t the breeding season and shares responsibility in raising young, DeWoody said. But just because two individuals act like a pair doesn't guarantee they're not having trysts on the sly. In fact, studies over the last decade have shown most broods of socially monogamous birds include offspring from at least t...

How HIV disables the cells' call for help

... hard-pressed to slip past these receptors without raising the alarm. The scientists surmised that the virus must be able to actively disable some part of the immune cell's system. They investigated a peptide fragment called FP (fusion peptide), a segment of the HIV protein gp41 found on the viral envelop. ...

Tiny roundworm's telomeres help scientists to tease apart different types of aging

... still shows signs of old age and eventually dies, raising intriguing questions. Are telomeres in non-dividing cells eroding slowly over time? If so, will worms with longer telomeres live longer? If not, how do worm cells and by extension non-dividing human cells, such as nerve cells, keep track of their bi...

Prescription pain patch abuse blamed for increase in deaths

...iversity of Florida researchers warn. The trend is raising alarm as the number of people dying from an overdo... the potential for abuse. This study is useful for raising awareness of the need for educating prescribing physicians on the importance of screening and monito...

Removing egg from nest may help save endangered whooping crane

...ional Park one of two whooping crane eggs laid and raising it in a "foster-parenting" program. Cranes usually rear a single chick and the other dies to siblicide or is killed by a predator, such as the wolf or fox. The egg-removal program was initiated years ago by Ernie Kuyt, an Edmonton-based scientist who...

New technique multiplies life span in simple organisms

... low pace in organisms lacking both SCH9 and SIR2, raising the possibility that the mutations that cause human cancers can be delayed or prevented," Longo said. "Notably, mutations that increase the activity of human homologs of the yeast SCH9 and RAS2 genes play central roles in many human cancers." Homolo...

Greasing interferon's gears may pave way to greater therapeutic benefits, fewer side effects

...eeds to pass on the interferon signal, essentially raising the speed limit on signal transmission. "Ordinarily, the interferon signaling system's rate may be slowed because this helper protein interacts with Stat1 at less than the maximum amount," Holtzman says. "It's possible that the maximal setting woul...

Hot-spring bacteria flip a metabolic switch

...res, and only live at the cooler edges of the mat, raising the question of whether N2 fixation was critical for organisms in the hotter regions of the mat. Because heat tolerant, single-celled cyanobacteria like Synechococcus specialize in photosynthesis, many researchers had dismissed them as candidates for...

Learning to love bacteria: Stanford scientist highlights bugs' benefits

...rd University School of Medicine microbiologist is raising the intriguing idea that persistent bacterial and viral infections have benefits. Stanley Falkow, PhD, the Robert W. and Vivian K. Cahill Professor in Cancer Research, is publishing his thoughts on this topic in an essay in the Feb. 24 issue of the ...

Scientists look to the Bahamas as a model for coral reef conservation

...rd University School of Medicine microbiologist is raising the intriguing idea that persistent bacterial and viral infections have benefits. Stanley Falkow, PhD, the Robert W. and Vivian K. Cahill Professor in Cancer Research, is publishing his thoughts on this topic in an essay in the Feb. 24 issue of the ...

Sexual reproduction delays aging in a mammalian species

...stly whole-life) helpers--burrowing, foraging, and raising young together. Whereas the breeding pair is sexually active throughout the year, the helpers are sexually quiescent. By comparing the long-term survival of breeders and non-breeders, Dammann and Burda found that the former lived extraordinarily long...

Researchers release new variety of asparagus

...ereby making the asparagus more profitable without raising consumer prices. Named "DePaoli" after William P. DePaoli, the first manager of the California Asparagus Commission who long supported the asparagus breeding program in the state, the superior hybrid marks the third time that UCR has released a n...

Darkness unveils vital metabolic fuel switch between sugar and fat

... glucose, glycogen and fat," the authors conclude, raising the longer-term possibility of 5'-AMP-based therapies for obesity or type 2 diabetes. ...

Rare Chinese frogs communicate by means of ultrasonic sound

...s because the frogs do not have external eardrums, raising the possibility of unusual hearing abilities. "Now we are getting a better understanding of why their ear drums are recessed," Feng said. "Thin eardrums are needed for detection of ultrasound. Recessed ears shorten the path between eardrums and the e...

St. Jude projects 90 percent cure rate for ALL

...of therapy. That's a key element of our success in raising the cure rate for ALL while limiting toxic effects of therapy." That success is based to a large extent on the work done at St. Jude and elsewhere in identifying specific mutations in leukemic cells that strongly suggest the likelihood that treatmen...

ASU researchers find link between social behavior, maternal traits in bees

...lude cleaning, maintaining and defending the hive, raising the young and foraging for nectar and pollen. Other species of bees, like carpenter bees, do not engage in social behavior and instead lead solitary lives. This has prompted researchers to look into how social structures and divisions of labor have ...

Chocolate, wine, spicy foods may be OK for heartburn, Stanford study finds

...minate the amount of heartburn you suffer. Second, raising the head of your bed will cut down on the amount of stomach acid that can enter your esophagus while you sleep. But Gerson noted a conundrum in her counsel. Although there is no evidence that ceasing consumption of the suspect foods will reduce hear...

Bacteria beat the heat

...ion center" of the bacterial cell. While gradually raising the surrounding temperature, the scientists timed this reaction to see how reaction rates changed as things heated up. A general rule for enzyme reactions states that as the heat rises, so does the reaction rate. Contrary to this rule, and the scie...

First human study confirms that immune cells can be a primary cause of bone loss in gum disease

...w understanding of periodontal disease, while also raising interesting questions about immune cells. We hope this work will help us save people's teeth in the future." Research Overview RANKL is a protein that is a major factor in the regulation of osteoclasts (cells that destroy bone). Dr. Kawai's resear...

Many cleaners, air fresheners may pose health risks when used indoors

...roduced various results ?some reassuring, and some raising concerns. The good news, the researchers reported, is that when people use the products under ordinary circumstances, their exposure to ethylene-based glycol ethers, formaldehyde and fine particles will normally not reach guideline values: that is, ...

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