Tag: "nitrate" at biology news
Scientists reveal fine detail of cell's energy machinery
...te dehydrogenase-N, a bacterial enzyme involved in nitrate
respiration, lies in the membranes of cells. Iwata's Laboratory of Membrane Protein Crystallography is one of a small number around the world that focuses on solving membrane protein structures using X-ray crystallography. Membrane proteins are tech...
New device removes drinking water contaminants
...lons of water per minute, removing perchlorate and nitrate
at the same time. The decontamination process take...harmless end products perchlorate to chloride and nitrate
to nitrogen gas while the hydrogen gas is oxidized to water. "We are exploiting nature," said Rittm...
MIT team probes arsenic and old lakes
...ents move through the water. "The work shows that nitrate
pollution, which arises from sources such as autom...ality." In an interesting twist, said Hemond, the nitrate
pollution, which is also associated with noxious impacts such as excessive algal growth, was found t...
Waddenzee fresher than ever
...for Sea Research. Along with the fresh water, more nitrate
and phosphate are entering the Waddenzee. During t...o been supplied with more nutrients, in particular nitrate
and phosphate. This is further increased by the fact that the rivers themselves contain more nutrien...
Arsenic in Bangladesh drinking wells may be linked to crop irrigation, MIT study finds
...mobilized arsenic from the sediment. Injections of nitrate
and oxygen-rich water provided further data, showing that arsenic levels can drop quickly after introduction of an oxidant. What remained was to find the source of the carbon. Harvey's team used radiocarbon dating to determine the age of the carbon ...
Research finds life 1000 feet beneath ocean floor
...sted they are closely related to known sulfate and nitrate
"reducers" that are common in other environments. The level of biological activity was sufficiently high that ammonia levels in the subsurface samples were 142 times higher than those in nearby seawater. "As more research such as this is done, we'll ...
Research suggests a new method to protect groundwater quality
...rmers to use crop production practices to minimize nitrate
leaching to groundwater in environmentally sensiti...roduction, and only increase yield or protect from nitrate
loss with specific combinations of soil type and climate such as a warm, wet spring and sandy soils...
Changing global nitrogen cycle impacting human health, says Colorado University-led study
... must be converted to chemically usable forms like nitrate
or ammonium. In the absence of humans, this happens during lightning strikes or more commonly through microbes. "The major global changes in the nitrogen cycle have occurred because humans now convert more nitrogen to such usable forms than all nat...
Science picks: Leads, feeds and story seeds for August 2003
... studying a research watershed with high levels of nitrate
in shallow ground water to determine where and how those contaminants enter ground-water systems. Models developed from these experiments will be used nationally to better track contaminants moving into ground-water systems. Call Arthur Baehr at 609-...
Improving fertilizer efficiency
...gen fertilizer applications on the results of soil nitrate
tests. According to a recent article in the Soil S...e nitrogen sensing tools. The typical spring soil nitrate
tests do not account for nitrate
loss or gain between soil sampling and planting, notes Kevin Bronso...
Golfing toward a greener environment
..., he and his team found that tire chips can absorb nitrate
- one of the main chemicals in fertilizers. Park s...fants who drink water containing excess amounts of nitrate
can become seriously ill and, left untreated, could die. For the study, the researchers inserted ti...
Scientists surprised at persistence of nitrate from dated experiment
...0 years ago is still influencing concentrations of nitrate
in ground water and stream flow draining from a 74... in western Iowa. The movement of a large pulse of nitrate
into the deep soils was tracked in follow-up studies, conducted up to 10 years later. But years late...
Ocean life depends on single circulation pattern in Southern Hemisphere
...covered a chemical signature (the presence of high nitrate
and low silicate levels) that is unique to this nutrient carrier, which is called the Subantarctic Mode Water, and used it to trace the influence of this water in surface waters around the world. "It is really quite amazing," said Sarmiento. "I had n...
JCI table of contents, January 2, 2004
...anion has only recently been appreciated. Salivary nitrate
is reduced to nitrite by oral bacteria. In the acidic environment of the stomach, nitrite is further reduced to nitric oxide, which has broad biological activity. In the January 2 issue of the Journal of Clinical Investigation, Jon Lundberg and colle...
Scientists report first sequencing of environmental genome
...an important branch of the tree of life containing nitrate
and nitrogen cycling bacteria, Banfield noted. Once Banfield's group had the five new genomes, they compared the genes in each with a database of known genes to identify their functions. For the two microbes with the most complete draft genomes, they...
JCI table of contents, February 2, 2004
...n used as sustained therapy a phenomenon known as nitrate
tolerance. In the February 2 issue of the Journal ...r denitrification of organic nitrates, that causes nitrate
tolerance. In an accompanying commentary, John D. Parker from Mount Sinai Hospital, Canada, comments...
Mysterious beach closures may be linked to contaminated groundwater, study finds
...quifer turned out to have unusually high levels of nitrate
- a nutrient typically associated with sewage. Lab...ts suggest that radium-rich groundwater containing nitrate
and bacteria could be pumped from the aquifer during spring tides,'' Boehm noted. ''Geochemists have...
Plant respiration not just an evolutionary leftover, study shows
...he plant to take inorganic nitrogen in the form of nitrate
and convert it into a form that is useful for plan...- both conditions that inhibit photorespiration -- nitrate
assimilation in the plant's shoot slows down. Eventually, a shortage of nitrogen will curtail the p...
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