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Pterosaurs waddled when they walked? (dinosaur research)
Science News
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May 30, 1987
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COPYRIGHT 1987 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group.
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Pterosaurs waddled when they walked?
When the dinosaurs ruled the earth, pterosaurs (wingedreptiles) were masters of the sky. Once envisioned as simple reptilian gliders, pterosaurs have recently been identified as warm-blooded, energetic and proficient fliers.
But while pterosaurs may have been agile in the air, David M.Unwin of Reading University in Britain concludes in the May 7 NATURE that, on the ground, they "could manage only a clumsy waddle' and had neither the stance nor mobile gait of fully erect birds. Consequently, he writes in NATURE'S News and ...
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Nitrogen solubility in liquid manganese and ferromanganese alloys
Magazine article from: Metallurgical and Materials Transactions
; The nitrogen solubilities in liquid manganese, manganese-iron...temperature range of 1623 to 1823 K. The equilibrium nitrogen content in pure liquid manganese at an atmospheric nitrogen pressure is high, and it does not follow Sievert...
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Nitrogen compounds
Magazine article from: Mining Engineering
; World nitrogen supply and demand were out of balance in...prices and industry profitability fell. The nitrogen business is cyclical. During the last few years, additions to worldwide nitrogen supply have outpaced the growth in demand...
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Nitrogen pollution: sources and consequences in the U.S. Northeast.
Magazine article from: Environment
; ...doubled the global rate at which reactive nitrogen is produced, greatly increasing nitrogen pollution in the environment. This article...describing the region's largest sources of nitrogen pollution, the problems it causes, and the...
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Nitrogen Desorption by High-Nitrogen Steel Weld Metal during CO2 Laser Welding
Magazine article from: Metallurgical and Materials Transactions
; Nitrogen desorption by high-nitrogen steels (HNSs) containing 0.32 and 0.53 pct nitrogen during CO2 laser welding in an Ar-N^sub 2^ gas mixture was investigated and the obtained data were compared with those for arc welding and at the...
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Nitrogen research shows how some plants invade, take over others.
Newspaper article from: NewsRx Health & Science
; ...space, often the actual battle is for getting the nitrogen. Now, research at the University of Nebraska...important new information on how plants can change "nitrogen cycling" to gain nitrogen and how this allows plant species to invade and...
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Nitrogen drops in: liquid nitrogen dosing is moving beyond beverage cans into new containers - and new products.
Magazine article from: Food Processing
; Liquid nitrogen dosing is moving beyond beverage cans into new...and new products. A little drop of liquid nitrogen can make a big splash. Depositing small amounts of liquid nitrogen into a bottle, jar or other airtight package...
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Nitrogen Compounds
Magazine article from: Mining Engineering
; World nitrogen supply and demand was out of balance...demand lower. In the United States, nitrogen producers were especially hard hit during...manufacturers had to contend with lower domestic nitrogen demand and a surge in imports into their...
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Nitrogen remobilization during grain filling in wheat: genotypic and environmental effects.
Magazine article from: Crop Science
; IN CEREALS, the main source of nitrogen for the grains is nitrogen remobilized from the vegetative parts (Simpson et al., 1983). This source accounts for 60 to 92% of the nitrogen accumulated in the grains at maturity (Austin et al...
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 "Herald-Times (Bloomington, IN)")
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Nitrogen: It's not just for NASCAR anymore.
Newspaper article from: Herald-Times (Bloomington, IN)
; ...Try filling your car's tires up with nitrogen instead. Proponents say the gas doesn...as when they're inflated with air. Nitrogen has been used in airplane tires for years...race cars and the space shuttle all use nitrogen. Brian Brasch, president of the Get...
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Nitrogen-base atmospheres: PSA nitrogen in heat treating. (pressure swing adsorption)
Magazine article from: Advanced Materials & Processes
; ...can be economically synthesized using nitrogen that has been mechanically separated...in the non-cryogenic production of nitrogen have allowed heat treaters to synthetically...without requiring bulk deliveries of liquid nitrogen. The most widespread non-cryogenic...
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