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Relevancy: 100%
SPP 1315: SOM-AGING: Physicochemical aging mechanisms in soil organic matter (Project)
One of the most valuable ecological potentials of soil organic matter (SOM) is based on its highly dynamic nature enabling flexible reactions on a variety of environmental conditions. SOM controls large part of the processes occurring at biogeochemical interfaces in soil and may contribute to sequestration of organic chemicals. This project focuses on understanding of these dynamics in SOM from a...
Funding period: 2007 - 2010
Relevancy: 100%
Collaborative project: Analysis of locomotion in cattle using fluoroscopy and novel load measurement systems as a basis for modification of claw trimming methods and a sustainable optimization of species-appropriate animal husbandry - subproject 3 (Project)
The project ProKlaue developed and evaluated procedures for a sustainable improvement of husbandry conditions and optimization of claw health management in dairy cows. The overarching goal was a significant improvement of claw health in intense housing systems and the improvement of animal wellbeing. Claw biomechanics of the bovine distal limb were analyzed in ex vivo and in vivo studies using...
Funding period: 2015 - 2018
Relevancy: 100%
SPP 1315: Influence of microbial activity on the structure-chemistry and chemodynamics of nonextractable residues of xenobiotics in soil derived organo-clay complexes (Project)
Organo-clay complexes in soil play a major role in the immobilisation and the persistence of xenobiotics and their metabolites. The project will contribute to understand the interactions in such complexes with a special attention to the spatial and structural arrangement of humic substances within organo-clay complexes which we expect to govern the sorption and binding of xenobiotics and their...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Highly-resolved imaging in aggregated soils: Which are the interfaces formed by interaction of water flow oxygen transport and biodegradation? (Project)
Dissolved oxygen is the primary electron acceptor for most degradation process in soil. Although dissolved oxygen concentrations can be high, where soil water is well connected to the atmosphere via gas phase pathways, at the same time there are numerous reactions consuming dissolved oxygen. Thus, at places of higher water saturation aerobic reactions create complex, dynamic oxygen patterns. In...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Dynamic (redox) interfaces in soil - Carbon turnover in microbial food webs and impact on soil organic matter (Project)
In soils, much of the stabilized soil organic matter is associated to minerals, in particular to Fe oxides and hydroxides. Therefore, interaction of organic material with mineral surfaces has been suggested to be an important mechanism for soil organic matter stabilization. However, even if we assume a very large capacity of some minerals to adsorb and protect organic matter, there will always be...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Effects of soil organic matter molecular conformation and substrate additions on the formation and release of xenobiotics bound residues (Project)
Most organic chemicals entering the soil form non-extractable residues with time, either as the parent compounds or as their metabolites. This occurs mainly mainly through interactions with the native soil organic matter (SOM), but there is only limited knowledge about the formation and binding mechanisms of these residues. The objective of this study is to determine the effects of SOM structural...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Impact of pesticides and oxygen on microbial cellulose degradation in aerated agricultural soils: A microscaled analysis of processes and prokaryotic populations (Project)
Cellulose is one of the most abundant carbonaceous compounds in terrestrial ecosystems, and its mineralization in agricultural soils contributes significantly to the global CO2 budget. Pesticides may affect the activities (e.g. beta-glucosidase) of soil microbes; however, their potential effect on the degradation of cellulose has not been resolved. Likewise, although it is common knowledge that...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Biogeochemical interface formation in soils as controlled by different components (Project)
The formation of soil interfaces is controlled by the type of particle surface(s) present and the assemblage of organic matter and mineral particles. We consider clay minerals, iron oxides and charcoal, all exhibiting high surface area and microporosity, as major soil components forming interfaces associated with organic matter which control the formation of interfaces relevant for sorption of...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Relating structure of organic chemicals to their sorption at biogeochemical interfaces by combining macroscopic, spectroscopic and calorimetric methods with molecular modelling (Project)
Physicochemical and steric properties of organic chemicals on the one hand and physicochemical surface properties and structural properties of the sorbent on the other hand determine sorptive interactions at biogeochemical interfaces. In order to gain a mechanistic understanding of these interactions we want to combine macroscopic, micro-calorimetric and spectroscopic methods. We hypothesise that...
Funding period: 2007 - 2010
Relevancy: 100%
SPP 1315: Interactions of organic pollutants with soil components - Elucidating mechanisms on a molecular level (Project)
Hypotheses: The behaviour of organic compounds on the microscale is distinctly influenced by interactions of these compounds on the nanoscale. Theoretical chemical methods can contribute to elucidating basic processes involved. Aims: a) Selection, improvement and development of simulation approaches. b) Development of more realistic theoretical models for simulations of interactions c) Prediction...
Funding period: 2007 - 2010
