Results 341 to 350 of about 4,709,326 (400)
Some of the next articles are maybe not open access.
Enhanced nitrogen deposition over China
Nature, 2013Xuejun Liu, Ying Zhang, Ying Zhang
exaly +2 more sources
2001
When leafy vegetables such as spinach and lettuce are grown in greenhouses during winter and early spring, i.e. at low light intensity and short day length, they may accumulate a high amount of nitrate in the leaves (Corre and Breimer 1979). A high nitrate content in vegetables is undesirable, because it may be harmful for the consumer.
ter Steege, M.W. +2 more
openaire +4 more sources
When leafy vegetables such as spinach and lettuce are grown in greenhouses during winter and early spring, i.e. at low light intensity and short day length, they may accumulate a high amount of nitrate in the leaves (Corre and Breimer 1979). A high nitrate content in vegetables is undesirable, because it may be harmful for the consumer.
ter Steege, M.W. +2 more
openaire +4 more sources
Nitrogen Fixation and Nitrogen Fertilization of Soybeans
Isotopes in Environmental and Health Studies, 1996Abstract In pot experiments with (15)N labelled soil and mineral (15)N, the influence of Bradyrhizobium (Rhizobium japonicum) inoculation and N fertilization on the symbiotic N(2) fixation and yield of soybeans [Glycine max (L.) Merill., cv. 'Fiskeby V'] was investigated.
H J Jacob, W Merbach
openaire +3 more sources
Variation in trophic shift for stable isotope ratios of carbon, nitrogen, and sulfur
, 2003Use of stable isotope ratios to trace pathways of organic matter among consumers requires knowledge of the isotopic shift between diet and consumer. Variation in trophic shift among consumers can be substantial. For data from the published literature and
J. H. McCutchan +3 more
semanticscholar +1 more source
2007
Publisher Summary This chapter provides an overview of nitrogen transformations. No other element essential for life takes as many forms in soil as nitrogen (N), and transformations among these forms are mostly mediated by microbes. Soil microbiology plays yet another crucial role in ecosystem function: in most terrestrial ecosystems, nitrogen limits ...
P.M. Groffman, G.P. Robertson
openaire +3 more sources
Publisher Summary This chapter provides an overview of nitrogen transformations. No other element essential for life takes as many forms in soil as nitrogen (N), and transformations among these forms are mostly mediated by microbes. Soil microbiology plays yet another crucial role in ecosystem function: in most terrestrial ecosystems, nitrogen limits ...
P.M. Groffman, G.P. Robertson
openaire +3 more sources
Herbivory in relation to plant nitrogen content
, 1980The nitrogen content of a plant is only one of the many plant characteristics that are vitally important to herbivores. However, because of its central role in all metabolic processes as well as in cellular structure and genetic coding, nitrogen is a ...
W. J. Mattson
semanticscholar +1 more source
Source and sink mechanisms of nitrogen transport and use
New Phytologist, 2018 Contents Summary 35 I. Introduction 35 II. Nitrogen acquisition and assimilation 36 III. Root-to-shoot transport of nitrogen 38 IV. Nitrogen storage pools in vegetative tissues 39 V. Nitrogen transport from source leaf to sink 40 VI. Nitrogen import into
Mechthild Tegeder +1 more
exaly +2 more sources
2010
Nitrogen constitutes approximately 78% of the earth’s atmosphere, but as a result of the strong triple bond in N2 molecules, the element is comparatively unreactive. One of the most important nitrogen compounds, ammonia, is produced by reaction of the elements under strenuous conditions. Moreover, there is an extensive chemistry in which liquid ammonia
James E. House, Kathleen A. House
openaire +3 more sources
Nitrogen constitutes approximately 78% of the earth’s atmosphere, but as a result of the strong triple bond in N2 molecules, the element is comparatively unreactive. One of the most important nitrogen compounds, ammonia, is produced by reaction of the elements under strenuous conditions. Moreover, there is an extensive chemistry in which liquid ammonia
James E. House, Kathleen A. House
openaire +3 more sources
, 2012
Nitrogen doping has been an effective way to tailor the properties of graphene and render its potential use for various applications. Three common bonding configurations are normally obtained when doping nitrogen into the graphene: pyridinic N, pyrrolic ...
Haibo Wang, T. Maiyalagan, Xin Wang
semanticscholar +1 more source
Nitrogen doping has been an effective way to tailor the properties of graphene and render its potential use for various applications. Three common bonding configurations are normally obtained when doping nitrogen into the graphene: pyridinic N, pyrrolic ...
Haibo Wang, T. Maiyalagan, Xin Wang
semanticscholar +1 more source
Nitrogen-Nitrogen Elastic Scattering
Physical Review, 1958An optical-model analysis of the measurements of nitrogen-nitrogen elastic scattering is made, and a quasi-classical discussion of the corresponding phase shifts is given. (auth)
openaire +2 more sources