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Tag: "nitrogen" at biology news

Organic farms produce same yields as conventional farms

...ficiency, costs, organic matter changes over time, nitrogen accumulation and nitrate leaching across organic a...than yields in the conventional system. # The soil nitrogen levels in the organic farming systems increased 8 to 15 percent. Nitrate leaching was about equivale...

Marine bacterium suspected to play role in global carbon and nitrogen cycles

... are involved in maintaining the global balance of nitrogen and carbon. Researchers have discovered the first...spect that Archaea could be involved in the marine nitrogen cycle. Subsequently having the organism isolated in the lab allowed us to confirm our suspicions," ...

UF researchers kill resistant bugs one bandage at a time

..., Schultz said. The coating comprises thousands of nitrogen clusters that permanently bond to substances such as gauze and fabric. Other dressings use a process that allows molecules to diffuse into the air and into the wound, which can slow healing and increases the chance germs will develop resistance. "Th...

Digging in the dirt for life's biochemical foundations

...e University-supported research on the movement of nitrogen brings into sharper focus this underground process...round the world has relied on the use of synthetic nitrogen fertilizers. The price of fertilizers is increasing, however, as are concerns about nitrogen runoff ...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...atmospheric scientist shows that, in some regions, nitrogen oxides emitted by the soil are much greater than e...mbustion and then extrapolating a global total for nitrogen oxide emissions, the new work used actual observations recorded in 2000 by the Global Ozone Monitori...

High carbon dioxide levels spur Southern pines to grow more needles

...or most affecting needle volumes was the amount of nitrogen present in the soils. Since much of the forested ...was once overused farmland, local soils tend to be nitrogen deficient. Her results showed that needle enhancements in CO2-treated trees were insignificant when ...

Freeze-dried mats of microbes awaken in Antarctic streambed

... the new microbial mats were taking up atmospheric nitrogen at a higher rate than mats in adjacent streambeds, increasing biomass productivity, she said. As photosynthetic bacteria, cyanobacteria are believed by biologists to be among the first living organisms to colonize Earth. The mats generally are orange...

Researchers find ways to turn manure into power

...uel in a secondary combustion chamber to lower the nitrogen oxides and specific metal emissions from coal-firing in the primary combustion chamber, Sweeten said. Re-sampling will begin next week upon completion of 50 days of composting of the two windrows. The analysis will be repeated on the partially-compo...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...and some challenges. Global atmospheric mapping of nitrogen dioxide pollution performed by ERS-2's GOME and En...tifique (CNRS) have been studying the retrieval of nitrogen dioxide variability from space and modelling its global behaviour. The team have published an art...

Pillows - a hot bed of fungal spores

... the house dust mites' faeces as a major source of nitrogen and nutrition (along with human skin scales). There could therefore be a 'miniature ecosystem' at work inside our pillows." Aspergillus is a very common fungus, carried in the air as well as being found in cellars, household plant pots, compost, co...

'Acid rain' and forest mass: Another perspective

...burning of fossil fuels, the amount of sulphur and nitrogen oxides in the atmosphere is greater than that deri...n of terrestrial ecosystems due to the increase in nitrogen availability (saturation) in systems where historically this element has been the limiting factor in...

Geoscientists follow arsenic from chicken feed to streambeds

... and urine from under poultry houses -- is rich in nitrogen and phosphorous, so is a logical fertilizer. But what happens to that arsenic? Virginia Tech geoscientists are determining what happens to such feed additives when they are part of the manure applied to agricultural fields. They will present their r...

New class of antibiotics effective against drug-resistant bacteria discovered in fungi

... and urine from under poultry houses -- is rich in nitrogen and phosphorous, so is a logical fertilizer. But what happens to that arsenic? Virginia Tech geoscientists are determining what happens to such feed additives when they are part of the manure applied to agricultural fields. They will present their r...

Storing carbon to combat global warming may cause other environmental problems, study suggests

...so remove nutrients like calcium and potassium and nitrogen from the soil, Jackson explained. During these chemical exchanges, "you leave sodium behind, which builds up in the soil to make it saltier," he said. Jackson's former postdoctoral scientist Esteban Jobbágy, now at the Universidad Nacional de San L...

Overfishing may drive endangered seabird to rely upon lower quality food

...pled were obtained. Measures of stable carbon and nitrogen isotopes ?derived from food ingested at the time t... distinguished in the feathers by higher levels of nitrogen isotopes. Less valuable food sources, including marine invertebrates such as krill, are signaled by ...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...be determined by measuring the ratio of carbon and nitrogen isotopes that accumulate in its body. For example, seals and sea lions are more enriched in heavy nitrogen-15 and carbon-13 than terrestrial wildlife, such as deer. Feathers and bones In 2002, Chamberlain and his colleagues embarked on a worldw...

Plants, too, have ways to manage freeloaders

...d differently to bacteria that efficiently produce nitrogen than they do to the slackers. Root nodules - in which bacteria share nitrogen with the plant in return for energy - grow bigger when infected with bacteria that are good at shari...

Hot-spring bacteria flip a metabolic switch

...and unexpectedly begin to fix nitrogen, converting nitrogen gas (N2) into compounds that are useful for cell g...how hot-spring microbial communities get essential nitrogen compounds. Carnegie's Arthur Grossman, Devaki Bhaya, and Anne-Soisig Steunou, along with colleagues...

Patterns in genome organization may partially explain how microbial cells work

...ther human infections to organisms that enrich the nitrogen content of soil. In addition, 16 more primitive microorganisms, including one that thrives in boiling hot springs, also exhibit patterns in their genomes that are highly nonrandom. "This high degree of organization of prokaryotic genomes is a comple...

Of mice, men, trees and the global carbon cycle

...found that plant emissions can be deduced from the nitrogen content of any plant. The study also reveals that ...Jan. 26 issue of the journal Nature. In revealing nitrogen content as the key to plant metabolic rates, the work uncovered a fundamental difference between pla...

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