Tag: "nitrogen" at biology news

Yellowstone microbes fueled by hydrogen, according to U. of Colorado study

...ecial sample vials and immediatelyfrozen in liquid nitrogen canisters to preserve the microbialcommunity.In springs where there was no sediment, Spear collected samples ofplanktonic organisms by hanging a glass slide in the water and allowingthe microbes to accumulate. "Bacteria are just like us. They like to...

Plants respond similarly to signals from friends, enemies

... to enter a partnership. The friend wants to trade nitrogen for food. The foe is a parasite that wants to burr...o signals from both rhizobia, the friends that fix nitrogen for the plant, and root-knot nematodes, the parasitic foes that want to harm the plant. Signals from...

Plant hemoglobins: Oxygen handlers critical for nitrogen fixation

...ant hemoglobin serves to assist in the fixation of nitrogen in the root nodules of legumes through a process t...bacteria, called rhizobia, that reduce atmospheric nitrogen to ammonia, which is subsequently used by the plant for growth and colonization of nitrogen-poor soi...

Amino acids in nectar enhance butterfly fecundity: A long awaited link

...of Basel raised map butterfly caterpillars on both nitrogen poor and nitrogen rich stinging nettle. After the butterflies emerged, they were fed nectar with or without amino acid...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...than on fox-infested islands came from analyses of nitrogen isotopes in soil, plant, and animal samples. "The terrestrial ecosystem was being subsidized by marine-derived nutrients, and the foxes basically cut off the subsidies by interrupting the flow of nutrients coming from offshore," Croll said. "It tran...

Survey finds silver contamination in North Pacific waters

...ted. Major pollutants from the burning of coal are nitrogen and sulfur compounds that contribute to acid rain and smog. Previous studies by Flegal's group have also found high mercury levels in rainfall on the U.S. West Coast, which they linked to contamination from coal burning in Asia. "Unlike mercury, sil...

To control germs, scientists deploy tiny agents provocateurs

...and symbiotically aid ecological processes such as nitrogen fixation. But at the darker end of the scale, biofilms can form infection-inducing layers on implanted medical devices and cause deadly lung infections in cystic fibrosis patients. Biofilms have long baffled researchers because of their stupefying ca...

First frozen egg baby born in Canada

...from her ovaries, which were then frozen in liquid nitrogen at ?96ºC. After a period of two months, the eggs were thawed and fertilized with her partner's sperm through in-vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI), and the resulting embryos implanted in her uterus. "The patient we...

NASA study finds snow melt causes large ocean plant blooms

... plants in seawater, called nitrate, into forms of nitrogen that most plants cannot use. One form of nitrogen that plants cannot consume is nitrous oxide, also known as laughing gas. In the atmosphere, nitrous ...

Anammox bacteria produce nitrogen gas in oceans' snackbar

...y percent of the global conversion of nutrients to nitrogen gas occurs in these areas. In 'The Proceedings of ...r consequences for our understanding of the global nitrogen cycle. The Benguela current system leads to upwelling of nutrient-rich cold water off the coast of N...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...n the gulf, wind-driven upwellings regularly bring nitrogen and other nutrients from the seafloor to the surfa...lizer runoff from farms, which dump tons of excess nitrogen into rivers that eventually flow into the sea. "There has been an international effort to try to un...

Man-made wetland's effectiveness similar to natural marsh

...reas, as freshwater algae thrive on this nutrient, nitrogen is a considerable problem in the Gulf of Mexico. ... region in order to see a significant reduction of nitrogen levels in the Gulf. ...

Finding hidden invaders in a Hawaiian rain forest

...ared Imaging Spectrometer (AVIRIS) to measure leaf nitrogen and water content from the aircraft, and corrobora...osideros tree typically has a low concentration of nitrogen in its leaves ( .6% to .8%), while the invading Canary Islands tree has relatively high nitrogen con...

A hope for oil spill bioremediation

... contaminated shore, although the process required nitrogen and phosphorus amendment, these two elements being limited in marine ecosystems. The results confirmed the presence of a microbiota readily able to degrade the contaminant. Further analysis of specific organisms present in contaminated beaches revea...

UN: World in big ecological mess

...ries combined. More than half of all the synthetic nitrogen fertilizers, first made in 1913, ever used on the planet have been used since 1985, resulting in a substantial and largely irreversible loss in diversity, with some 10 to 30 per cent of the mammal, bird and amphibian species currently threatened with...

Team Invents Device For Weighing Individual Molecules

...in this case a very fine "spray" of xenon atoms or nitrogen molecules. Because the nanodevice is cooled, the molecules condense on the bar and add their mass to it, thereby lowering its frequency. In other words, the mechanical vibrations of the now slightly-more-massive nanodevice become slightly lower in fr...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

... called Archaea, in the biofilm capture carbon and nitrogen from the atmosphere and derive energy from iron th...terium, was responsible for a key function: fixing nitrogen from the atmosphere. The new proteome confirms that this is a keystone species in more ways than one...

Deep thinking: Scientists sequence a cold-loving marine microbe

...e (PHA) compounds, that may also boost reserves of nitrogen and carbon, which could be in short supply in the extreme cold. The organism also engineers cold-hardy versions of ordinary enzymes found in free-living bacteria, such as enzymes that break down organic matter. C. psychrerythraea possesses genes that...

Newly discovered genetic disease sheds light on body's water balance

...c Huang, MD, Gitelman administered urea, a natural nitrogen compound that encourages urination by acting as an osmotic agent. As water flowed out of their bodies and sodium concentrations returned to normal, both babies recovered. They continue to be followed by the UCSF team. Next Gitelman, Rosenthal and Fe...

Hybrid grass may prove to be valuable fuel source

...or a doctorate in plant biology. Nutrients such as nitrogen are transferred to the rhizome to be saved until the next growing season, he said. Burning Miscanthus produces only as much carbon dioxide as it removes from the air as it grows, said Heaton, who is seeking a doctorate in crop sciences. That balance...

1 2 3 4 5