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Auflistung nach Schlagwort "nitrogen"

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Aspects of nitrogen use efficiency of cauliflower I. A simulation modelling based analysis of nitrogen availability under field conditions

Kage, H.; Alt, C.; Stützel, H. (Cambridge : Cambridge University Press, 2003)

Data from several field experiments (eight crops grown under a widely varying nitrogen supply on a loess loam soil) were used for a simulation modelling based analysis of nitrogen availability of cauliflower. The model was ...
Aspects of nitrogen use efficiency of cauliflower II. Productivity and nitrogen partitioning as influenced by N supply

Kage, H.; Alt, C.; Stützel, H. (Cambridge : Cambridge University Press, 2003)

Based on studies concerning dry matter (DM) partitioning, DM production, root growth, nitrogen (N) contents of cauliflower organs and soil nitrate availability (first part of the paper Kage et al. 2003b), an integrated ...
Burkholderiaceae Are Key Acetate Assimilators During Complete Denitrification in Acidic Cryoturbated Peat Circles of the Arctic Tundra

Hetz, Stefanie A.; Horn, Marcus A. (Lausanne : Frontiers Media, 2021)

Cryoturbated peat circles (pH 4) in the Eastern European Tundra harbor up to 2 mM pore water nitrate and emit the greenhouse gas N2O like heavily fertilized agricultural soils in temperate regions. The main process yielding ...
Cellular plasticity in response to suppression of storage proteins in the Brassica napus embryo

Rolletschek, Hardy; Schwender, Jörg; König, Christina; Chapman, Kent D.; Romsdahl, Trevor; Lorenz, Christin; Braun, Hans-Peter; Denolf, Peter; van Audenhove, Katrien; Munz, Eberhard; Heinzel, Nicolas; Ortleb, Stefan; Rutten, Twan; McCorkle, Sean; Borysyuk, Taras; Guendel, André; Shi, Hai; Auwermeulen, Michiel Vander; Bourot, Stephane; Borisjuk, Ljudmilla (Rockville, Md. : American Society of Plant Physiologists, 2020)

The tradeoff between protein and oil storage in oilseed crops has been tested here in oilseed rape (Brassica napus) by analyzing the effect of suppressing key genes encoding protein storage products (napin and cruciferin). ...
Does long-term soil warming affect microbial element limitation? A test by short-term assays of microbial growth responses to labile C, N and P additions

Shi, Chupei; Urbina‐Malo, Carolina; Tian, Ye; Heinzle, Jakob; Kwatcho Kengdo, Steve; Inselsbacher, Erich; Borken, Werner; Schindlbacher, Andreas; Wanek, Wolfgang (Oxford [u.a.] : Wiley-Blackwell, 2023)

Increasing global temperatures have been reported to accelerate soil carbon (C) cycling, but also to promote nitrogen (N) and phosphorus (P) dynamics in terrestrial ecosystems. However, warming can differentially affect ...
Dynamics of the activated dissociative chemisorption of N2 on W(110): A molecular beam study

Pfnür, Herbert; Rettner, C.T.; Lee, J.; Madix, R.J.; Auerbach, D.J. (College Park, MD : American Institute of Physics, 1986)

Molecular beam techniques have been used to study the dissociative chemisorption of nitrogen on W(110). Chemisorption probabilities have been measured as a function of incidence angle θi and kinetic energy Ei surface ...
Effects of soil organic matter properties and microbial community composition on enzyme activities in cryoturbated arctic soils

Schnecker, Jörg; Wild, Birgit; Hofhansl, Florian; Alves, Ricardo J. Eloy; Barta, Jin; Čapek, Petr; Fuchslueger, Lucia; Gentsch, Norman; Gittel, Antje; Guggenberger, Georg; Hofer, Angelika; Kienzl, Sandra; Knoltsch, Anna; Lashchinskiy, Nikolay; Mikutta, Robert; Šantrůčková, Hana; Shibistova, Olga; Takriti, Mounir; Urich, Tim; Weltin, Georg; Richter, Andreas (San Francisco : Public Library of Science, 2014)

Enzyme-mediated decomposition of soil organic matter (SOM) is controlled, amongst other factors, by organic matter properties and by the microbial decomposer community present. Since microbial community composition and SOM ...
Herbaceous Legume Encroachment Reduces Grass Productivity and Density in Arid Rangelands

Wagner, Thomas C.; Hane, Susanne; Joubert, Dave F.; Fischer, Christina (San Francisco, CA : Public Library of Science, 2016)

Worldwide savannas and arid grasslands are mainly used for livestock grazing, providing livelihood to over a billion people. While normally dominated by perennial C-4 grasses, these rangelands are increasingly affected by ...
Improvement of hydrothermal stability of zeolitic imidazolate frameworks

Liu, Xinlei; Li, Yanshuo; Ban, Yujie; Peng, Yuan; Jin, Hua; Bux, Helge; Xu, Longya; Caro, Jürgen; Yang, Weishen (Cambridge : Royal Society of Chemistry, 2013)

The metal-organic framework ZIF-8, which undergoes hydrolysis under hydrothermal conditions, is endowed with high water-resistance after a shell-ligand-exchange-reaction. The stabilized ZIF-8 retains its structural ...
Kinetic energy and angular dependence of activated dissociative adsorption of N2 on W(110): Observed insensitivity to incidence angle

Auerbach, C.J.; Pfnür, Herbert; Rettner, C.T.; Lee, J.; Madix, R.J. (College Park, MD : American Institute of Physics, 1984)

Measurements are reported of the dependence of the dissociative adsorption probability on the incidence angle of nitrogen beam. The supersonic molecular beam of N2 is incident on a W(110) surface mounted in a UHV chamber. ...
Metal-organic framework nanofibers via electrospinning

Ostermann, Rainer; Cravillon, Janosch; Weidmann, Christoph; Wiebcke, Michael; Smarsly, Bernd M. (Cambridge : Royal Society of Chemistry, 2011)

A hierarchical system of highly porous nanofibers has been prepared by electrospinning MOF (metal-organic framework) nanoparticles with suitable carrier polymers. Nitrogen adsorption proved the MOF nanoparticles to be fully ...
Nitrogen availability and retention in clayey steppe soils of semi-arid North Kazakhstan

Koch, Markus (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)

Obwohl Stickstoff (N) das am häufigsten vorkommende Element auf der Erde ist, ist es für die meisten Organismen in terrestrischen Systemen das doch am wenigsten verfügbare. Steppen-Böden der nördlichen Hemisphäre spielen ...
Nitrogen dynamics in Turbic Cryosols from Siberia and Greenland

Wild, Birgit; Schnecker, Jörg; Bárta, Jiri; Čapek, Petr; Guggenberger, Georg; Hofhansl, Florian; Kaiser, Christina; Lashchinskiy, Nikolay; Mikutta, Robert; Mooshammer, Maria; Šantrůčková, Hana; Shibistova, Olga; Urich, Tim; Zimov, Sergey A.; Richter, Andreas (Amsterdam : Elsevier, 2013)

Turbic Cryosols (permafrost soils characterized by cryoturbation, i.e., by mixing of soil layers due to freezing and thawing) are widespread across the Arctic, and contain large amounts of poorly decomposed organic material ...
PH-responsive release of chlorhexidine from modified nanoporous silica nanoparticles for dental applications

Fullriede, Hendrik; Abendroth, Philipp; Ehlert, Nina; Doll, Katharina; Schäske, Jörn; Winkel, Andreas; Stumpp, Sascha Nico; Stiesch, Meike; Behrens, Peter (Berlin : De Gruyter, 2016)

A pH-sensitive stimulus-response system for controlled drug release was prepared by modifying nanoporous silica nanoparticles (NPSNPs) with poly(4-vinylpyridine) using a bismaleimide as linker. At physiological pH values, ...
Physiological and Morphological Responses of Cassava Genotypes to Fertilization Regimes in Chromi-Haplic Acrisols Soils

Mwamba, Sydney; Kaluba, Peter; Moualeu-Ngangue, Dany; Winter, Etti; Chiona, Martin; Chishala, Benson H.; Munyinda, Kalaluka; Stützel, Hartmut (Basel : MDPI, 2021)

The objective of this study was to evaluate the performances of three cassava genotypes on yield, physiology and morphological traits under different fertilization regimes. A field experiment was conducted in a split-plot ...
Rapid probe of the nicotine spectra by high-resolution rotational spectroscopy

Grabow, Jens-Uwe; Mata, S.; Alonso, J.L.; Peña, I.; Blanco, S.; López, J.C.; Cabezas, C. (Cambridge : Royal Society of Chemistry, 2011)

Nicotine has been investigated in the gas phase and two conformational forms were characterized through their rotational spectra. Two spectroscopic techniques have been used to obtain the spectra: a new design of broadband ...
Soil organic carbon stocks in estuarine and marine mangrove ecosystems are driven by nutrient colimitation of P and N

Weiss, Christian; Weiss, Joanna; Boy, Jens; Iskandar, Issi; Mikutta, Robert; Guggenberger, Georg (New York, NY : Wiley, 2016-06-26)

Mangroves play an important role in carbon sequestration, but soil organic carbon (SOC) stocks differ between marine and estuarine mangroves, suggesting differing processes and drivers of SOC accumulation. Here, we compared ...
Spectromicroscopy of pulses transporting alkali metal in a surface reaction

Günther, S.; Liu, H.; Menteş, T.O.; Locatelli, A.; Imbihl, R. (Cambridge : Royal Society of Chemistry, 2013)

The NO + H2 reaction on a potassium promoted Rh(110) surface is shown to sustain the formation of spatio-temporal periodic patterns leading to mass transport phenomena. The excitation of pulses and the mass transport ...
Surface structure and reactivity of platinum in the oxidation of ammonia

Zeng, Yingfeng (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2008)

[no abstract]
Unravelling the importance of mycorrhiza for plant nitrogen nutrition and transfer into the networks

Fernandes Figueiredo, Aline (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)

Most terrestrial plants establish symbiotic associations with fungi called mycorrhiza, like ectomycorrhizas (EM) and arbuscular mycorrhizas (AM), for accessing limiting plant nutrients. For improving N nutrition, some plant ...

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