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Latest Nitrogen Stories

2012-01-17 10:15:41

Interdisciplinary panel reviews US nitrogen pollution trends, risks, and mitigation strategies Nitrogen is both an essential nutrient and a pollutant, a byproduct of fossil fuel combustion and a fertilizer that feeds billions, a benefit and a hazard, depending on form, location, and quantity. Agriculture, industry and transportation have spread nitrogen liberally around the planet, say sixteen scientists in the latest edition of ESA's Issues in Ecology series, "Excess Nitrogen in the U.S....

2012-01-12 14:35:54

A team of researchers at the California Institute of Technology (Caltech) has devised a new method for making complex molecules. The reaction they have come up with should enable chemists to synthesize new varieties of a whole subclass of organic compounds called nitrogen-containing heterocycles, thus opening up new avenues for the development of novel pharmaceuticals and natural products ranging from chemotherapeutic compounds to bioactive plant materials such as morphine. The...

Image 1 - Nitrogen From Humans Pollutes Remote Lakes
2011-12-16 09:06:55

Nitrogen derived from human activities has polluted lakes throughout the Northern Hemisphere for more than a century and the fingerprint of these changes is evident even in remote lakes located thousands of miles from the nearest city, industrial area or farm. The findings, published in the journal Science Dec. 16, are based on historical changes in the chemical composition of bottom deposits in 36 lakes using an approach similar to aquatic archeology. More than three quarters of the...

2011-12-15 17:40:13

Humans are having an effect on Earth's ecosystems but it's not just the depletion of resources and the warming of the planet we are causing. Now you can add an over-abundance of nitrogen as another "footprint" humans are leaving behind. The only question is how large of an impact will be felt. In a Perspectives piece in the current issue of Science (Dec. 16, 2011), Arizona State University researcher James Elser outlines some recent findings on the increasing abundance of available...

2011-12-15 17:02:05

The number of sugar maples in Upper Great Lakes forests is likely to decline in coming decades, according to University of Michigan ecologists and their colleagues, due to a previously unrecognized threat from a familiar enemy: acid rain. Over the past four decades, sugar maple abundance has declined in some regions of the northeastern United States and southeastern Canada, due largely to acidification of calcium-poor granitic soils in response to acid rain. Sugar maple forests in the...

New Effect Of Acid Rain On Forests
2011-12-09 03:49:42

Too Many Dead Leaves a Bad Sign for Sugar Maples Scientists have discovered that nitrogen that falls from the atmosphere in acid rain can influence large tracts of sugar maples in North America. The atmospheric nitrogen in acid rain can affect forest ecosystems by acidifying soils and causing nutrient imbalances. Sugar maples in northeastern North America are especially vulnerable. Vast maple areas have been affected by this acidification process, which depletes soil calcium in...


Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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