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Tag: "environments" at biology news

MIT creates 3-D scaffold for growing stem cells

...cts filtered away. Cells move within their natural environments in response to chemical signals or other stimuli. Researchers are aware that cells on flat surfaces have skewed metabolisms, gene expression and growing patterns. But the only choices have been glass labware and a product called Matrigel, a gelatin...

Adults who go to bed lonely get stress hormone boost next morning

...Adam is interested in how people's changing social environments get under the skin to influence their biology and health. "Stress systems are designed to translate social experience into biological action," she said. "They are designed to be a conduit from the outside world to our internal worlds so that we can b...

Scientists use an 'ice lolly' to find polar bacteria in their own backyard

...fore have advantages for snow-making in artificial environments such as ski centres and in waste-water purification. "Selecting for rare microbes that seem to stick to ice has been fun, but now the real work begins to find out what genes are responsible for this attraction" Said Professor Walker. These findings...

Researchers discover how bacteria sense their environments

...verything around it. Bacteria can sense in their environments changes in molecular concentrations as small as 0.1 percent, the equivalent of one drop diluted in a pool of a 1,000 drops. How do they do it? New Cornell research, highlighted on the cover of the May issue of Nature Structural and Molecular Biolog...

Beaver dams create healthy downstream ecosystems

...ds, suggesting that beaver can create and maintain environments suitable for the formation and persistence of wetlands." The study comes as the beaver population in Rocky Mountain National Park is dwindling. Approximately 30 of the animals currently live there, down from a high of nearly 600 estimated in 1940. T...

NAU researchers chirping over discovery of new cricket genus

...nd odd evolutionary forms that reflect the extreme environments found in caves." Cave-dwelling invertebrates are important for conservation, because they can be rare and/or highly limited in distribution, Cobb said. Wynne said more than 1,000 caves have been identified in Arizona and less than 3 percent have b...

Birds going extinct faster due to human activities

...ces, may one day help scientists create laboratory environments to grow specialized cells that can be transplanted...ents, cultured and transplanted into damaged brain environments to restore functions lost to disease or injury. "We largely keep the brain cells we are born with...

Medium is the message for stem cells in search of identities

...ces, may one day help scientists create laboratory environments to grow specialized cells that can be transplanted...ents, cultured and transplanted into damaged brain environments to restore functions lost to disease or injury. "We largely keep the brain cells we are born with...

New research finds surveys of larval-stage organisms effective for measuring marine biodiversity

...oral Triangle is one of the most threatened marine environments in the world. Often areas with particularly high rates of biodiversity are targeted for conservation, so the new method could help by highlighting potential regions for protection. Barber also believes this new information will move scientists one ...

Gut microbes' partnership helps body extract energy from food, store it as fat

...famous because of their ability to live in extreme environments where nothing else could survive, such as hot springs. Scientists first isolated archaea from the human intestine in 1982, and have recently recognized M. smithii as the most common archaeon in human intestines. In addition to its prevalence, M. sm...

Global warming may warrant new approaches to ecosystem restoration

...the largest potential challenge ahead is restoring environments undergoing the most rapid rate of change in the earth's history. This global climate change is likely to have important regional consequences for biota and ecosystems. Ecological restoration, including reafforestation and rehabilitation of degr...

BGSU biologist trying to crack microscopic code

...l," he says. Living in and adapting to different environments is "part of who they are," but also, Larsen hopes, an avenue to additional funding for his research of the bacteria, which he calls a "little brother" to the organism that causes cholera. ...

It's all in the genes

...t to know if their findings hold true in different environments around the world. "To understand how important something is, you have to test in multiple locations," Whitham said. A parallel study in Australia that examines the eucalyptus tree as the foundation species is yielding the same results as the studies...

Human behavior changes the number of strains of infectious diseases

...rowded public transport. That's two very different environments for a pathogen. There are always going to be plenty of factors that determine which strains emerge, but human mixing behavior has a big part to play." ...

What's shaped like a pear and has 2 genomes? Check the pond

...ed that one way that Tetrahymena adapts to diverse environments via gene duplication, a process that allows organisms to diversify pre-existing genes and adapt them for new functions. In the case of Tetrahymena, duplications appear to be concentrated in genes involved in sensing and responding to environment. F...

Tiny shock absorbers help bacteria stick around inside the body

...ved together to help the bacteria persist in tough environments inside a host animal or person. "Research on these fimbriae uncovers something that's essentially a mechanical nanotechnological device created by nature, and gives us the opportunity to adapt such a system for biotechnological and even other techn...

Bacteria beat the heat

...different kinds of bacteria ?one found in moderate environments and the other, an intense-heat lover. Both were photosynthetic (that is, using the sun's energy to create sugars for food). The focus of the research was a reaction that takes place in enzymes in the photosynthetic "reaction center" of the bacterial ...

Single cell amoeba increases MRSA numbers 1000- fold

...bacteria. As amoebae are often found in healthcare environments this discovery has implications for the infection control strategies adopted by hospitals. The single cell amoeba, Acanthamoeba polyphagam commonly eats and digests environmental bacteria. It also engulfs pathogens such as MRSA. However, instead of ...

Ancient fossil DNA found preserved in crystal

...e in fossil bone," protecting the DNA from hostile environments and leaving it relatively undamaged over time. The team's findings suggest that the DNA in these aggregates should be preferred, whenever possible, over DNA from untreated bone. This method holds much promise for the future analysis of ancient DNA i...

Research updates 65-year-old genetic discovery

...panzees, it provides a way to live safely in their environments by avoiding toxic plants and other harmful compounds. Research conducted more 65 years ago by a team of scientists led by Sir Ronald Aylmer Fisher, the eminent British statistician and geneticist, concluded that this gene variant was the same in hum...

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