Carbon and hydrogen dynamic isotope equations are used to describe the dominant processes of waste biodegradation: Effect of aeration in methanogenic phase of the landfill.

The sequence of microbiological processes occurring during the decomposition of fresh and old organic wastes from landfills is analyzed using the developed dynamic models, which are verified on the basis of experimental data previously obtained in anaerobic and aerobic laboratory reactors. The models are based on the material balances of the heavy and light isotopes of carbon and hydrogen during the biodegradation of cellulosic waste as a relatively poorly degradable substrate. According to the models, under anaerobic conditions, dissolved carbon dioxide is a substrate for hydrogenotrophic methanogenesis, which leads to an increase in the isotope signature of carbon in carbon dioxide and its subsequent stabilization.

Anaerobic oxidation of methane coupled with sulphate reduction: high concentration of methanotrophic archaea might be responsible for low stable isotope fractionation factors in methane.

The changes in CH and CHH during sulphate-dependent anaerobic oxidation of methane (AOM) were described using dynamic modelling. The batch sulphate-dependent AOM at the nearly linear dynamics of methane oxidation with different enriched cultures originating from three marine sediments was simulated. The traditional Rayleigh equation for carbon and hydrogen stable isotopes in methane was derived from the basic dynamic isotope equation.

Novel Prefrontal Synthesis Intervention Improves Language in Children with Autism.

Prefrontal synthesis (PFS) is defined as the ability to juxtapose mental visuospatial objects at will. Paralysis of PFS may be responsible for the lack of comprehension of spatial prepositions, semantically-reversible sentences, and recursive sentences observed in 30 to 40% of individuals with autism spectrum disorder (ASD). In this report we present data from a three-year-long clinical trial of 6454 ASD children age 2 to 12 years, which were administered a PFS-targeting intervention.

Using kinetic isotope effect to evaluate the significance of the sequential and parallel steps: formation of microbial consortium during reversible anaerobic methane oxidation coupled with sulfate reduction.

The purpose of this study was to describe the dynamics of anaerobic oxidation of methane (AOM) coupled with sulfate reduction (SR) using experimental data from a continuous incubation experiments published earlier in order to show that formation of consortia of anaerobic archaea (ANME) and Desulfosarcina-like bacteria (DSS) may have a significant effect on sulfur isotope fractionation. The dynamic simulation of reversible AOM by ANME coupled with SR by DSS was performed. This simulation took into account biomass growth and fractionation of stable isotopes of sulfur.

Modelling the specific pathway of CH and CO formation using carbon isotope fractionation: an example for a boreal mesotrophic fen.

We described mathematically the process of peat methanization in a boreal mesotrophic fen. Gaseous and dissolved CH and CO as well as their δC signatures were considered in the dynamic equations for incubation bottles. In accordance with the model, acetate, H, and CO were produced during cellulose hydrolysis and acidogenesis.