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Tag: "ammonia" at biology news

Pesticides choke pathway for nature to produce nitrogen for crops

...th the plants to convert atmospheric nitrogen into ammonia that, then, is used as fertilizer by the plants. "Agrichemicals are blocking the host plant's phytochemical recruitment signal," said the study's lead author, Jennifer E. Fox, a postdoctoral researcher in the Center for Ecology and Evolutionary Bi...

An 'elegant' idea proves its worth 25 years later

...rs followed by "maintenance infusions" until blood ammonia levels were normal. The patients’ overall survival...ercent, and 96 percent survived episodes of severe ammonia poisoning. An estimated one in 40,000 live births is a child with a urea cycle disorder, accordi...

Fuel from fiber -- Pretreatment can put corn stalks, trees in your car's tank

...loped a patented pretreatment process for biomass, ammonia fiber expansion (AFEX), which makes the breakdown of cellulose ?the most difficult part of making ethanol from plant biomass ?more efficient. Dale and other members of the Biomass Refining Consortium for Applied Fundamentals and Innovation will di...

Scientists: As rainfall changes, tropical plants may acclimate

...plants revealed that they switched from nitrate to ammonia "abruptly, and in unison" once the rainfall reached a certain level. "There's an abrupt change halfway through the rainfall gradient, and they all switch to this other form for their nutrition," Schuur said. That's a surprise partly because of ...

New mechanism for nutrient uptake discovered

...rge animal marking its territory. A sudden flow of ammonia could be toxic to the plant. If it weren't for a r...developed this feature because there was much more ammonia on the early Earth. The ubiquitous presence of this structure in all of the known ammonium transport...

Nature's process for nitrogen fixation caught in action

Nitrogen gas is converted to ammonia fertilizer by a chemical process that involves hig... intermediate stages between nitrogen gas (N2) and ammonia (NH3) that require adding electrons and protons." In order to trap the process at a specific stag...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

... ammonia, then ''nitrifying'' bacteria oxidize the ammonia into nitrites and nitrates, which are readily abso...ea-in this case, marine Crenarcheaota-also oxidize ammonia into nitrite. Less than a month later, Francis and his colleagues published a paper in the Proce...

Microbe fixes nitrogen at a blistering 92 C

...rogen gas, that's unusable by life, to a form like ammonia that is useable ?arose before the three main branches of life ?bacteria, archaea and eukaryotes ?diverged some 3.5 billion years ago, according to oceanographer Mausmi Mehta, who recently received her doctorate from the UW, and John Baross, UW profes...

Ammonia-loving archaea win landslide majority

...obes, in a process known as nitrification, combine ammonia with oxygen to form nitrates, which are used as nu...ther means. The bacterial counterparts can only do ammonia (and urea) oxidation, nothing else." During a recent study of a collection of genes in microorga...

Alternatives to the use of nitrate as a fertiliser

... molecular mechanisms that the ability to tolerate ammonia confers on these plants. In this study, Mª Dolore...te that the processes associated with tolerance to ammonia in the pea are multiple with respect to spinach. In the pea plant there is greater regulation of the...

UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

...of low dissolved oxygen, high hydrogen sulfide and ammonia concentrations, high temperatures and an increasing level of salinity. Due to noxious odors emanating from the Salton Sea, a 32 kilometer-long State Recreation Area on the northeast shore remains under-used. "The Salton Sea at one time attracted mo...

Sea slug mixes chemical defense before firing at predators

...on into the water consisting of hydrogen peroxide, ammonia and several types of acids. A team of researchers with the Atlanta-based Center for Behavioral Neuroscience (CBN) has found that this secretion is produced from normally inert chemicals stored separately in two glands. The discovery, published in the...

'Acid rain' and forest mass: Another perspective

... of herds, have given rise to the concentration of ammonia emissions in certain zones. This compound, deposited close to the sources of emission, is able to react with the acidic ions deposited at the same time. Subsequently, certain bacteria are capable of oxidising the compound, thus forming nitrate and li...

New book expands biological classifications to account for 'alien' life

...organisms are more likely to use compounds such as ammonia that remain liquid at very low temperatures. Ward is one of several faculty members in the UW's groundbreaking graduate program in astrobiology. The program, the first of its kind, started in 1998 with a grant from the National Science Foundation an...

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

...have discovered the first Archaea known to oxidize ammonia for energy and metabolize carbon dioxide by successfully growing the tentatively named, Nitrosopumilus maritimus, in the lab. "Data from several cultivation-independent, molecular experiments led us to suspect that Archaea could be involved in the m...

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