Erweiterte Suche der Leibniz Universität Hannover

Discrepancy in exchangeable and soluble ammonium induced effects on aerobic methane oxidation a microcosm study of a paddy soil verfasst von Hester van Dijk, Thomas Kaupper, Clemens Bothe, Hyo Jung Lee, Paul L.

Addition of young C to shells during diagenesis occurs in soil solution, where the Ca 2 concentration is in equilibrium with exchangeable Ca 2 and/or weathering of Ca bearing minerals. While the exchange process takes place within seconds, the dissolution equilibrium requires longer timescales on the order of months . It has therefore been hypothesized that the dissolution and recrystallization of shell carbonate in soils with higher ...

Compared with CK CaO 0 , the addition of lime improved the pH as well as the exchangeable calcium ECa and total nitrogen TN contents of both soils. The peanut yield as well as the available nitrogen AN , available phosphorus AP and exchangeable potassium EK contents were also higher in AS treated with lime than in that treated with no lime, while lime application to NS had little effect on the yield and AN and EK contents and...

This tensile testing device provides the opportunity for compensating frictional forces during the tensile test, and using exchangeable bearings, the device can be adapted to a wide assortment of pipes. Research has been carried out regarding the shape and size of a stress concentrator introduced into the sample.

Prevailing reducing conditions in the Ag horizon were documented by a maximum concentration of exchangeable Mn II . High redox dynamics were indicated by minimum concentrations of total and extractable Fe in the A3 horizon as well as by minimum susceptibility and saturation isothermal remanent magnetization in the A3 and Ag horizons.

It also resulted in an enhanced plant growth and higher K concentrations in the shoot without K topdressing. The uptake of K by plants exceeded the amount of exchangeable K in some peat clay blends where no K was fertilized. The amount of K released from the clays in the plant experiments was in the same magnitude as the maximal desorbable K determined in the percolation experiment and was highly dependent on the mineralogical composi...

High Al fluxes in litterfall 8.77 1.3 to 14.2 1.9 kg ha 1 yr 1 , mean SE indicated a high Al circulation through the ecosystem. The fraction of exchangeable and potentially plant available Al in mineral soils was high, being a likely reason for a low root length density in the mineral soil.

Data collected included particle size distribution, water dispersible clay, clay dispersion ratio CDR , clay flocculation index CFI , pH, organic carbon content, cation exchange capacity CEC , exchangeable cations, oxalate and dithionite soluble Fe and Al, mineralogical composition of the clay fraction, specific surface area and surface charge SC .

Dijk HV , Kaupper T , Bothe C, Lee HJ, Bodelier PLE , Horn MA et al. Discrepancy in exchangeable and soluble ammonium induced effects on aerobic methane oxidation: a microcosm study of a paddy soil . Biology and fertility of soils . 2021 Aug 57 6 :873 880.

A conceptual basis for surveying fouling communities at exposed and protected sites at sea: Feasible designs with exchangeable test bodies for in situ biofouling collection. / Isbert, W. Lindemann, C. Lemburg, J. et al. in: Applied ocean research , Jahrgang 136, 103572, 07.2023.

A conceptual basis for surveying fouling communities at exposed and protected sites at sea: Feasible designs with exchangeable test bodies for in situ biofouling collection. / Isbert, W. Lindemann, C. Lemburg, J. et al. in: Applied ocean research , Jahrgang 136, 103572, 07.2023.

Not only the end of life processes contribute to this decrease, but also operational process improvements, like a sustainable-energy electric-fleet based distribution of exchangeable batteries, route optimization, and policies that allow scooters to stay on the streets are part of it. Related work research for bikes, the close look on the substituted modes and the connected pollution for e-scooter, shows that free floating mobility sy...

JEL classification: G11; G31 Keywords: Credit contagion; Business partner network; Credit portfolio loss distribution; Portfolio loss volatility; Voter model see front matter r 2005 Elsevier B.V. In this paper we propose a model for such contagion phenomena and study the contagion- induced volatility of aggregate credit losses on large portfolios of financial positions. In order to derive explicitly the distribution of aggregated losses due to...

Ich danke allen Mitarbeitern des Instituts für Radioökologie und Strahlenschutz dafür, dass sie mich als Kollegen und Freund aufgenommen haben, wodurch ich immer einen Ansprechpartner bei Fragen oder Problemen hatte. Fabian Matthias Köhler Selbstständigkeitserklärung Hiermit erkläre ich, dass ich die vorliegende Arbeit selbstständig und ohne fremde Hilfe verfasst und keine anderen Hilfsmittel als angegeben verwendet habe. ........................

Hannover, Januar 2020 ________________________ Fabian Matthias Köhler Danksagung An dieser Stelle möchte ich mich bei den Menschen bedanken, welche mich bei die- ser Arbeit unterstützt haben. Das Ziel dieser Arbeit ist daher, im Rahmen von radioökologischer Untersuchun- gen Informationen über das Verhalten des Iods in der Umwelt mit einem Fokus auf die Speziation des Iods in Meerwasser und im Boden im Hinblick auf dessen Migration zu erhalten....