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Tropical forests leak nitrogen back into atmosphere, say scientists
May 23, 2006Princeton, N.J. - In findings that could influence our understanding of climate change, a Princeton research team has learned that tropical forests return to the atmosphere up to half the nitrogen they receive each year, thanks to a particular type of bacteria that lives in those forests.
The bacteria, referred to as "denitrifiers," exist in forest soil, where they live by converting the nitrates fed upon by tree roots back into nitrogen gas, which is lost to the atmosphere. The researchers who recently discovered this behavior say the findings are important for our understanding of how tropical forests fit into the earth's climate system.
"Tropical forests play a major role in regulating the planet's climate, and these findings indicate that we are still working on our basic understanding of the nitrogen cycle," said Lars Hedin, a researcher on the team and professor of ecology and evolutionary biology at Princeton. "That a group of bacteria can have such a dramatic impact on forest nutrition debunks our previous theories about how nitrogen behaves in forests, and shows us that these microorganisms affect soil nutrients and forest growth."
Princeton University
Princeton University
Nitrogen Current Events and Nitrogen News RSSNitrogen loss threatens desert plant life, study shows
As the climate gets warmer, arid soils lose nitrogen as gas, reports a new Cornell study. That could lead to deserts with even less plant life than they sustain today, say the researchers.
Air pollution increases infants' risk of bronchiolitis
Infants who are exposed to higher levels of air pollution are at increased risk for bronchiolitis, according to a new study.
USC study finds big air pollution impacts on local communities
Heavy traffic corridors in the cities of Long Beach and Riverside are responsible for a significant proportion of preventable childhood asthma, and the true impact of air pollution and ship emissions on the disease has likely been underestimated, according to researchers at the University of Southern California (USC).
Iron controls patterns of nitrogen fixation in the Atlantic
Scientists including researchers from the National Oceanography Centre, Southampton and the University of Essex have discovered that interactions between iron supply, transported through the atmosphere from deserts, and large-scale oceanic circulation control the availability of a crucial nutrient, nitrogen, in the Atlantic.
Wolves, moose and biodiversity: An unexpected connection
Moose eat plants; wolves kill moose. What difference does this classic predator-prey interaction make to biodiversity?
North America automobile sector bottom of 'world sustainability league'
The study, entitled Sustainable Value in Automobile Manufacturing, looks at the sustainability performance of 17 leading car manufacturers worldwide between 1999 and 2007.
Interactions with aerosols boost warming potential of some gases
For decades, climate scientists have worked to identify and measure key substances -- notably greenhouse gases and aerosol particles -- that affect Earth's climate.
Designer molecule detects tiny amounts of cyanide, then glows
A small molecule designed to detect cyanide in water samples works quickly, is easy to use, and glows under ultraviolet or "black" light.
Report examines hidden costs of energy production and use
A new report from the National Research Council examines and, when possible, estimates "hidden" costs of energy production and use -- such as the damage air pollution imposes on human health -- that are not reflected in market prices of coal, oil, other energy sources, or the electricity and gasoline produced from them.
Caltech researchers reveal unexpected sources of nitrogen fixation
Researchers at the California Institute of Technology (Caltech) have identified an unexpected metabolic ability within a symbiotic community of microorganisms that may help solve a lingering mystery about the world's nitrogen-cycling budget.
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The World's Greatest Fix: A History of Nitrogen and Agriculture by G. J. Leigh (Author) In the tradition of Jared Diamond's Guns, Germs, and Steel, this gives the very early history of how human ingenuity overcame the risk of famine through productive agriculture. Starting with a layman's guide to the chemistry of nitrogen fixation, the book goes on to show how humans emerged from nomadic lifestyles and began developing towns and settlements. When they for the first time began planting the same fields year after year, they noticed quickly the need to ensure soil fertility. But how? The method they came up with is still in use to this day. |
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Nitrogen Air Tank 10lb Aluminum by KegWorks This tank is perfect for Guinness! This is a mixed gas tank featuring a siphon tube that extends 3/4 down the tank. This siphon tube ensures that gas is maintains the correct mixture needed for a perfect pint of Guinness. This Nitrogen cylinder is produced from high strength aluminum alloy. Enjoy the benefits of aluminum tanks - lighter than steel tanks, and do not rust! A nitrogen gas regulator is required. In stock and ready to ship. Features: Made of high quality aluminum. For serving Guinness. . . . . Specs: Dimensions: 20"H x 7"D. Weight: 14.25 ib. 20-Cubic foot capacity. Dispense 3 - 4 half kegs. 1800 service rating. |
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Pure Energy Fixed - 5 Year N2 Tank - 48ci 3000psi by Pure Energy Get ready to play year round with no troubles, it's time to put the C02 away and go with nitrogen. Features: Consistent Flow Technology piston Mil-spec Belleville springs Dual safety rupture plugs for both bottle and downstream safety Mechanical gauge Nickel plated brass bonnet Certified fill nipple and dual locking set screws Preset at 850 psi Approximately 500 shots per fill 5 year hydro test date Note: This tank DOES have a TC Stamp |
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Espoma Organic Traditions Urea Nitrogen Fertilizer 45-0-0 - 5 lb Bag #UR5 by Espoma 5 LB, 45-0-0, Urea Fertilizer, Source Of Nitrogen Fertilizer, Promotes Green Color & Rapid Growth, Improves Yield & Enhances Quality Of Crops. |
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Nitrogen (True Books) by Salvatore Tocci (Author) Ideal for today's young investigative reader, each A True Book includes lively sidebars, a glossary and index, plus a comprehensive "To Find Out More" section listing books, organizations, and Internet sites. A staple of library collections since the 1950s, the new A True Book series is the definitive nonfiction series for elementary school readers. |
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Twocal-Hn High Nitrogen Liquid, Vanilla by Ross Nutritional, #00729 - 8 Oz / Can, 24 Cans / Case by ROSS NUTRITIONAL. INDICATIONS: Twocal-Hn High Nitrogen Liquid, Vanilla a nutritionally complete, high nitrogen liquid formula. It is an ideal tube feeding to meet the increased protein and calorie needs of patients with severe fluid restrictions or for those with limited volume tolerance. With 119 Cal per 2 fl oz, its also an excellent oral supplement for medication pass programs. Lactose and gluten free. TWOCAL HN is a nutritionally complete, high-calorie liquid food designed to meet the increased protein and calorie needs of stressed patients and those requiring low-volume feedings. usage: For tube or oral feeding. For supplemental or sole-source nutrition. Often provided in 2-fl-oz amounts QID with Med Pass to assist with weight gain or maintenance. Twocal-Hn High Nitrogen Liquid Features: High in... |
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Uniweld RHP400 400 PSI Nitrogen Regulator by Uniweld Uniweld 400 PSI Nitrogen Regulator is designed for purging and pressure testing with high pressures. It features large T handles for easy pressure adjustment and A CGA580 inlet and quarter inch flare outlet connection. This tool also includes easy to read 2 inch gauge and is made of heavy duty brass construction. This tool which is for use with nitrogen is backed by a 2 year warranty on material and workmanship. |
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Blurr Nitrogen Insulated Jacket - Women's by Blurr Its a chilly, windy Sunday. Pull on the Blurr Womens Nitrogen Insulated Jacket and meet your friend at the crag. The windproof, water-resistant nylon face fabric on this jacket fights the elements, and light insulation keeps your muscles from tensing up in the cold. On Monday morning you can zip into this insulated jacket, slip your MP3 in the interior pocket, and enjoy your bike commute to work. The large hood on this jacket warms your noggin when you leave your beanie at home. Product FeaturesMaterial: 100% Nylon ripstopInsulation: 150g Poly BTUHood: YesPockets: [External] 2 fleece-lined hand; [Internal] 1 MP3, 1 otherWaterproof: NoCore Venting: NoRecommended Use: Casual, belaying, biking to workManufacturer Warranty: 30 DaysCountry of Origin:... |
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Cstar 8x25 Waterproof Compact Porro Prism Binoculars by CStar Optics Cstar's 8 Power Compact Waterproof Porro Prism Binoculars give the best quality and value for the price.Cstar's BW-825C binoculars are Waterproof and Fog proof. Nitrogen filled to assure no moisture is able to get inside the Optically Multi-Coated Glass Lenses. The BW-825C comes with a built in compass, and have formed finger grips for added comfort while viewing. All of Cstar's Waterproof Series binoculars feature a Optically Engineered Lens system and give a bright and sharp image with NO blurry edges around the viewing area. The BW-825C binocular features, Multi-Coated Glass Lenses to help reduce Color Aberration, and Pop-up Eye-Cups that are perfect for Eye-Glass wearers. Our Waterproof series binoculars are made to last for years. Compact and Light weight, great for boating,... |
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Smith Ultra High Pressure Regulator Purging Nitrogen 2,000 PSI by Smith Equipment SMITH EQUIPMENT# 825-00-09 Ultra high pressure heavy duty regulator. This high pressure regulator is for use on cylinders with a wide variety of non-corrosive inert gases. Piston sensor design gives structural reliability in high pressure use. Low torque control adjusting screw permits easy adjustmnet of pressures in closed or dead end systems. Nitrogen regulator. Typical applications High pressure testing Purging and charging Calibration kits Airline charging kits Chemical plants Manufacturing processes Research and development Laboratories Specs Max inlet pressure 6,000 PSIG Delivery Pressure 0-2,000 PSI Inlet gauge 0-10,000 psi / Graduations 200 PSI Delivery gauge 0-3,000 psi / Graduations 100 PSI Inlet fitting CGA 580 Outlet No fitting. Standard 1/4" NPT in regulator... |
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