Results 11 to 20 of about 24,736 (213)

Microbial Interactions as Drivers of a Nitrification Process in a Chemostat

open access: yesBioengineering, 2021
This article deals with the inclusion of microbial ecology measurements such as abundances of operational taxonomic units in bioprocess modelling. The first part presents the mathematical analysis of a model that may be framed within the class of Lotka ...
Pablo Ugalde-Salas   +3 more
doaj   +1 more source

A Delayed Chemostat Model with Impulsive Diffusion and Input on Nutrients

open access: yesAdvances in Difference Equations, 2009
A chemostat model with delayed response in growth and impulsive diffusion and input on nutrients is considered. Using the discrete dynamical system determined by the stroboscopic map, we obtain a microorganism-extinction periodic solution. Further, it is
Jianjun Jiao, Shaohong Cai
doaj   +2 more sources

Bacteriophage-Mediated Perturbation of Defined Bacterial Communities in an In Vitro Model of the Human Gut

open access: yesMicrobiology Spectrum, 2022
The study of bacteriophage communities reproducing in the gastrointestinal tract is limited by the quality of model systems supporting experimental manipulation in vitro.
Hedieh Attai   +6 more
doaj   +1 more source

Control Factors for the Equilibrium Composition of Microbial Communities in Open Systems: Theory and Experiments

open access: yesMathematics, 2023
The present paper is a summary of the authors’ theoretical and experimental research dealing with the patterns of stable equilibrium coexistence of microbial populations in flow systems interacting through specific density-dependent growth regulators ...
Andrey Degermendzhi, Alexander Abakumov
doaj   +1 more source

Nutrient-Limited Operational Strategies for the Microbial Production of Biochemicals

open access: yesMicroorganisms, 2022
Limiting an essential nutrient has a profound impact on microbial growth. The notion of growth under limited conditions was first described using simple Monod kinetics proposed in the 1940s.
Hemshikha Rajpurohit, Mark A. Eiteman
doaj   +1 more source

Metabolic modeling and analysis of the metabolic switch in Streptomyces coelicolor [PDF]

open access: yes, 2010
Background The transition from exponential to stationary phase in Streptomyces coelicolor is accompanied by a major metabolic switch and results in a strong activation of secondary metabolism.
Alam, Mohammad T.   +6 more
core   +17 more sources

Global analysis of a new nonlinear stochastic differential competition system with impulsive effect

open access: yesAdvances in Difference Equations, 2017
We propose a new stochastic competition chemostat system with saturated growth rate and impulsive toxicant input. The main purpose of this paper is to study the stochastic dynamics of a high-dimensional impulsive stochastic chemostat model and find the ...
Xuejin Lv, Lu Wang, Xinzhu Meng
doaj   +1 more source

Analysis of biomass productivity and physiology of Nitrososphaera viennensis grown in continuous culture

open access: yesFrontiers in Microbiology, 2023
Microbial ammonia oxidation is the first and usually rate limiting step in nitrification and is therefore an important step in the global nitrogen cycle. Ammonia-oxidizing archaea (AOA) play an important role in nitrification.
Michael Melcher   +6 more
doaj   +1 more source

A modeling approach of the chemostat [PDF]

open access: yes, 2014
Population dynamics and in particular microbial population dynamics, though they are complex but also intrinsically discrete and random, are conventionally represented as deterministic differential equations systems.
Campillo, Fabien   +2 more
core   +6 more sources

Continuous Bioproduction of Alginate Bacterial under Nitrogen Fixation and Nonfixation Conditions

open access: yesFermentation, 2023
Alginate is a biomaterial produced by Azotobacter vinelandii, a diazotroph that, under nitrogen-fixing conditions, can fix nitrogen under high oxygen levels. In A.
Pablo Contreras-Abara   +5 more
doaj   +1 more source

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