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Tag: "faced" at biology news

University of Manchester makes made-to-measure skin and bones a reality using inkjet printers

...ne."This breakthrough overcomes problems currently faced by scientists whoare unable to grow large tissues and have limited control over theshape or size the tissue will grow to. It also allows more than onetype of cell to be printed at once, which opens up the possibility ofbeing able to create bone graft...

Weill Cornell Research Reveals Secrets Of Trafficking Within Cells

...s of clathrin," Dr. Ryan explained. However, they faced one methodological roadblock. As Dr. Ryan explained, scientists have long known how to gauge the importance of particular proteins, using a kind of Òon/offÓ comparison. They do this by using Òknock-outÓ mice genetically engineered to either express ...

Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

...s true for miners, insects, while underground, are faced with high-carbon-dioxide and low-oxygen amounts, necessitating a better ventilation system. While oxygen is essential for their cells to produce energy, the removal of carbon dioxide from their bodies is equally important to prevent its toxic buildup...

Nano-Probes Allow an Inside Look at Cell Nuclei

...he tool Paul developed and applied it to a problem faced by biologists every day ?getting inside the nucleus, a desirable target because the cell's genetic information resides there," says Chen. First, they had to breach the nuclear membrane, which has pores that are only about 20 nanometers wide. To fit ...

Stem Cell Research Shows Potential for Replacing Tissue Damaged in Heart Attacks

...This problem is one of the biggest clinical issues faced by heart patients in the United States today,?says Dr. Lough. In looking at ways to use ES cells, the research team had to consider the fact that the cells are “pluripotent,?meaning that they can develop into any of the 210 different cell types in t...

Gray wolves maintain the food chain in winter

... wolves' impact on the fate of resident scavengers faced with a changing climate. Their models show that wolf kills temper the potentially devastating effects of climate-related carrion shortages on scavengers. Unlike mountain lions and grizzly bears, wolves abandon their prey (usually elk or moose) once s...

Small species back-up giant marsupial climate change extinction claim

...or centuries. It is essential to know if the risks faced by species and ecosystems today are the same as those in the past. "If we can document past environmental change and its influence on the extinction of species, it might have predictive value in estimating the effects of possible future climate chan...

Defenseless plants arm themselves with metals

...and acne medications - governs this pathway. When faced with a fungus or bacteria, most plants turn up their production of salicylic acid, which then interacts with other molecules in the plant, eventually turning on the genes that produce the proteins involved in fighting infection. These infection-fight...

Same-Sex Mating Discovered in a Toxic Fungus

...an. That diversity might provide an advantage when faced with new environmental challenges, he said. While the findings have no immediately obvious clinical implications, Heitman said, "the more we know about the biological cause of any disease, the better positioned we are to develop cost-effective diagn...

Supercomputers to focus brains on AIDS dilemma

...tly extended life-spans to patients who previously faced early deaths. Structural biology and molecular dynamics computer simulations played an important role in these discoveries. However, in recent years, mutant strains of HIV have shown increasing resistance to many of these formerly effective drugs, r...

Scientists use manufacturing methods to reconstruct mastodon

...s rarely find complete skeletons, so they're often faced with the task of creating realistic substitutes for the missing bones. Incomplete skeletons are even more common with fossil mastodons because humans sometimes butchered the massive, elephant-like animals and hauled off whole hunks of meat, often wit...

Hopkins AIDS experts issue warning about global efforts to provide drug therapies

...py continues to grow. "Local health officials are faced with the unenviable and difficult task of having to decide who will get therapy and live, and who will have to do without and possibly die," he says. "But this dilemma is unavoidable because supply will fall far short of demand, despite the generous ...

Genetic links could unlock clues to leading cause of blindness

...rs." One of the biggest problems researchers have faced is determining how much of a role genetics plays versus lifestyle and environmental factors such as blue light, part of the spectrum of natural visible light. Frequent exposure to blue light rays has been linked to macular degeneration. If the diseas...

Bumblebees copy one another when contending with unfamiliar flowers

...t the flowers from which they collect nectar. When faced with unfamiliar plants, foraging bees do not choose flowers entirely alone but instead copy the choices of other bees. The new findings suggest that bees adjust their behavior when dealing with flowers of unfamiliar plant species. The observations a...

Spiders help scientists discover how muscles relax

...in their relaxed state. Even then, the researchers faced mathematical difficulties in calculating a three-dimensional map of the filaments. In 2004, using a new approach that Edward Egelman at the University of Virginia Health Sciences Center had developed to create the map, they soon had their structure. ...

Tetanus toxin found to have therapeutic properties

...at prevents the death of the neurons when they are faced with aggressive situations. This is why the scientists believe the harmless toxin fragment could be more effective than neurotrophins as protection against neurodegenerative disorders such as Parkinson's disease. ...

Gap-climbing fruit flies reveal components of goal-driven behaviors

Like humans, other animals are faced with everyday obstacles in their physical environments and must engage appropriate decision-making and motor skills to deal with them. Navigating these obstacles can involve highly complex events in mammals and other vertebrates, but in new work, res...

Crisis in African fish supplies looms, experts warn Africa leaders

...culture for Africa's development and of challenges faced by the sector. "African fisheries and aquaculture are at a turning point," says WorldFish Director-General Stephen Hall. "There is a pressing need for strategic investments to better natural fish stocks management, develop aquaculture and enhance A...

Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice

...culture for Africa's development and of challenges faced by the sector. "African fisheries and aquaculture are at a turning point," says WorldFish Director-General Stephen Hall. "There is a pressing need for strategic investments to better natural fish stocks management, develop aquaculture and enhance A...

Retina adapts to seek the unexpected, ignore the commonplace

...l features." While manipulating the visual scenes faced by salamanders and rabbits, Meister and colleagues recorded neural signals from the animals' retinal ganglion cells, testing whether adaptation to a different environment altered the encoding of retinal signals. From the neural responses to novel sti...

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