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Tag: "water" at biology news

Ring-like formations in drying DNA drops could affect hybridization studies

...evaporated, DNA chains were transported outward by water flow to the drop's perimeter," Wong said. "At the droplet edge, the DNA became increasingly concentrated and formed a liquid crystal with concentric chain orientations. (Liquid crystals are materials that flow like a liquid, but can align in a prefer...

Triple threat polymer captures and releases

...se it takes in water, oddly becomes stronger when water absorbs into it. Think of a soggy diaper as a hyd...s versus strain. "When you pull on a sponge, the water comes back out," she said. "But in our case, because our sponge and the channels within it are es...

Female guppies risk their lives to avoid too much male attention

...erence to their advantage, venturing into the deep water where predators lurk. The males' bright coloring also attracts predators, making it too dangerous for them to follow. "Understanding why and how [sexual segregation] occurs is essential if we are going to conserve and protect species and habitats,"...

How did cactuses evolve?

...hue found that the Pereskia species already showed water use patterns that are similar to the leafless, stem-succulent cacti. "[Our] analyses suggest that several key elements of cactus ecological function were established prior to the evolution of the cactus life form," explain the authors. "Such a seque...

Precision biochemistry tracks DNA damage in fish

...can serve as a measure of the biological impact of water and sediment pollution--or pollution clean-up. Tha...ed the adverse effects of industrial pollutants in water and sediment on the health of fish in the lower Duwamish River. The Duwamish flows through an indust...

Scientists take 'snapshots' of enzyme action

...ctor combines with the other oxygen atom to form a water molecule, which is released. Once the substrate is oxygenated, it leaves the enzyme and the cofactor binds again. "With this back-and-forth, alternating binding, the process repeats over and over for continuous turnover of the product," Swaminathan ...

NYU researchers decorate virus particles, showing potential to enhance MRI capabilities

...capable of influencing the response of neighboring water molecules. Our study provides evidence that this e...s observe in MRI scans is generated primarily from water molecules within the body, we potentially have the ability to get better contrast and clearer images...

Researcher gives hard thoughts on soft inheritance

...tretching their legs to lift themselves out of the water and that generations later that kind of environment gave rise to birds with long legs. Neo-Lamarckian views of evolutionary change stress the importance of the environment in altering inheritance. "When most biologists hear the name Lamarck o...

Harmful Algal Blooms monitored from space in Chile

...strument onboard NASA's Aqua satellite and in situ water monitoring to monitor the Southern Ocean off the c...ough the project, is also used to characterise the water circulation patterns in the major aquaculture area in southern Chile. Aquaculture has become a cap...

UCSD researchers develop 'smart petri dish'

...more about the way environmental toxicants such as water contaminants or viruses like hepatitis cause long-term liver damage." Others involved in the development include Sara Alvarez, a graduate student in Sailor's laboratory, and Austin Derfus, a graduate student of engineering in Bhatia's former UCSD l...

Arctic expedition will investigate alien-like glacier

... the in 1999 and 2001 and collected samples of the water and mineral deposits from the spring, which contai... organisms have been found living in extremely hot water around geothermal vents deep in the ocean floor but are seldom observed living in cold environments....

UCI scientists find chlorine may contribute to ozone formation

...ir by the wind. Chlorine gas also is used to treat water in swimming pools, cooling towers and municipal water supplies. Chlorine atoms react rapidly with hydrocarbons and nitrogen oxides from automobile and pow...

Ecosystem services and invasive species

...paces. Ecosystem services in such area can include water purification, regulation of climate, and recreational values. Rosanna Cappellato and student Adam Bohnert (Rhodes College, Memphis) studied four plots in the park to determine a value for the services this urban forest provides to the community. Ac...

Acidity in the brain could hold the key to stroke treatment

... rate at which hydrogen ions are exchanged between water and proteins in the brain. Acidity causes this rate to increase, changing the NMR signal of water. ...

New flood-tolerant rice offers relief for world's poorest farmers

...bited, and the plants will dieif they remain under water for more than four days. During any given year, ...m 10 percent to total destruction,depending on the water depth, age of the plant, how long the plantsare submerged, water temperature, rate of nitrogen ferti...

Invasive species alter habitat to their benefit

...nt cycling, wildfire frequency and the movement of water through the system. But simply observing such changes doesn't prove that the invaders are responsible. University of Michigan researchers Emily Farrer and Deborah Goldberg, however, came up with a way to tease out the cause of environmental cha...

Beekeepers work hard for the honey, despite changing tupelo forest

...o trees from their source of fresh water. Upstream water diversion also has lessened the flooding needed for a healthy tupelo forest. Exotic pests are taking their toll, and beekeepers throughout Florida are losing between 30 percent and 50 percent of their bee colonies to mite and beetle infestations. ...

UN review shows need to halt destructive fishing practice

...gement Organizations with authority to govern deep water fisheries ?the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) and the General Fisheries Council of the Mediterranean (GFCM) ?have taken steps to regulate bottom trawling. In 2003, the Gordon and Betty Moore Foundation...

Researchers discover which organs in Antarctic fish produce antifreeze

... at about ? degree Celsius. These species dwell in water that rarely rises above the freezing point and is regularly filled with ice crystals. From the intestine, the AFGPs are, apparently, absorbed into the blood. This hypothesis is based on the near-identical composition and abundance of AFGPs found in ...

Bacteria can help predict ocean change

...ou what month it is if you just got me a sample of water from out there," Fuhrman said. The researchers t...th the Wrigley Institute's monthly measurements of water temperature, salinity, nutrient content, plant matter and other variables. The researchers found t...

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