The degradation of various formulations of the racemic mixture and the enantiomers (including mefenoxam) of metalaxyl in typical soils from Germany and Cameroon in controlled incubation experiments was studied. The kinetics of the degradation or transformation was determined by means of reversed phase HPLC, while the enantiomeric ratios were measured by HPLC with a chiral Whelk O1 column. The d...

AIMS   To determine the kinetics of substrate fluxes in a microbial community in order to elucidate the roles of the community members. METHODS AND RESULTS   The kinetics of substrate sharing in a bacterial consortium were measured by a new analytical approach combining immunostaining, stable isotope probing and fluorescence-activated cell sorting (FACS). The bacterial consortium, consisting ...

Decomposition of soil organic matter (SOM) is mediated by microbial extracellular hydrolytic enzymes (EHEs). Thus, given the large amount of carbon (C) stored as SOM, it is imperative to understand how microbial EHEs will respond to global change (and warming in particular) to better predict the links between SOM and the global C cycle. Here, we measured the Michaelis–Menten kinetics [maximal r...

Planktonic marine microbes live in dynamic habitats that demand rapid sensing and response to periodic as well as stochastic environmental change. The kinetics, regularity, and specificity of microbial responses in situ, however, are not well-described. We report here simultaneous multitaxon genome-wide transcriptome profiling in a naturally occurring picoplankton community. An in situ robotic ...

The environmental relevance of standard biodegradation tests such as OECD 309 has been questioned. Challenges include the interpretation changing degradation kinetics over 60–90 incubation days and effects chemical spiking on microbial community. To ameliorate these weaknesses, we evaluated a modified test using water sediment from three Swedish rivers. For each river, had treatments (no spikin...

A number of nonlinear microbial models of soil carbon decomposition have been developed. Some of them have been applied globally but have yet to be shown to realistically represent soil carbon dynamics in the field. A thorough analysis of their key differences is needed to inform future model developments. Here we compare two nonlinear microbial models of soil carbon decomposition: one based on...

This review summarizes the state of microscale in situ analyses of nitrification. Microsensors and fluorescence in situ hybridization (FISH) have both become important methods for microbial ecology. In combination, they have offered a variety of exciting insights into structure and activity of microbial communities, including nitrifying biofilms, aggregates, and sediments. Several levels of inf...

Acid stimulated accumulation of insoluble phosphorus within microbial cells is highly beneficial to wastewater treatment but remains largely unexplored. Using single cell analyses and next generation sequencing, the response of active polyphosphate accumulating microbial communities under conditions of enhanced phosphorus uptake under both acidic and aerobic conditions was characterised. Phosph...

The microbial transfer of electrons to extracellularly located solid compounds, termed extracellular electron transport (EET), is critical for microbial electrode catalysis. Although the components of the EET pathway in the outer membrane (OM) have been identified, the role of electron/cation coupling in EET kinetics is poorly understood. We studied the dynamics of proton transport associated w...

This review presents an update describing binary and ternary semiconductors involving interfacial charge transfer (IFCT) in composites made up by TiO2, CuO, Ag2O Fe2O3 used microbial disinfection (bacteria viruses). The mechanism, kinetics generation of reactive oxygen species (ROS) solution under solar/visible light are discussed. surface properties the photocatalysts their active catalytic si...