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Comparison of the development of stem galls induced by Aulacidea hieracii (Hymenoptera: Cynipidae) on hawkweed and by Diplolepis spinosa (Hymenoptera: Cynipidae) on rose.
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Abstract: Plant galls induced by two distantly related species of cynipid wasps, Aulacidea hieracii Bouche, which belongs to a basal lineage and induces galls on Hieracium umbellatum L., and Diplolepis spinosa (Ashmead), which belongs to a derived group and induces galls on Rosa blanda Ait. and Rosa rugosa Thunb., were compared. As gall characters are determined by the wasp rather than the host plant, we hypothesized that information on gall development would contribute to our understanding of the evolution of the cynipid complex. Galls induced by both species are spherical ...
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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 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 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 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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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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Nitrogen oxides emission--an important environmental protection issue for China.(Health, Safety & Environment)
Magazine article from: China Chemical Reporter
; "If there is no control for nitrogen oxides (NOx) emission, China...the nation's rapidly increasing nitrogen oxides emission." This viewpoint...Technology Seminar for the Control of Nitrogen Oxides Air Pollution held by the...
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