Results 21 to 30 of about 24,736 (213)

Competitive exclusion for chemostat equations with variable yields [PDF]

, 2011
In this paper, we study the global dynamics of a chemostat model with a single nutrient and several competing species. Growth rates are not required to be proportional to food uptakes. The model was studied by Fiedler and Hsu [J. Math. Biol.
Sari, Tewfik
core   +6 more sources

The buffered chemostat with non-monotonic response functions [PDF]

, 2013
We study how a particular spatial structure with a buffer impacts the number of equilibria and their stability in the chemostat model. We show that the occurrence of a buffer can allow a species to persist or on the opposite to go extinct, depending on ...
Haidar, Ihab, Harmand, Jérôme, Rapaport, Alain   +2 more
core   +6 more sources

Modeling and analysis of random and stochastic input flows in the chemostat model [PDF]

, 2019
In this paper we study a new way to model noisy input flows in the chemostat model, based on the Ornstein-Uhlenbeck process. We introduce a parameter β as drift in the Langevin equation, that allows to bridge a gap between a pure Wiener process, which is
Caraballo Garrido, Tomás, Garrido Atienza, María José, López de la Cruz, Javier   +2 more
core   +1 more source

Stability Results for a Class of Differential Equation and Application in Medicine

Abstract and Applied Analysis, 2009
A Chemostat system incorporating hepatocellular carcinomas is discussed. The model generalizes the classical Chemostat model, and it assumes that the Chemostat is an increasing function of the concentration.
Qingyi Zhan, Xiangdong Xie, Zhifang Zhang   +2 more
doaj   +1 more source

Polymicrobial oral biofilm models: simplifying the complex [PDF]

, 2019
Over the past century, numerous studies have used oral biofilm models to investigate growth kinetics, biofilm formation, structure and composition, antimicrobial susceptibility and host–pathogen interactions.
Appelbaum, Black, Bradshaw, Bryn Short, Ceri, Christopher Delaney, Darveau, Fitzgerald, Gibbons, Gordon Ramage, Hamilton, Jason L. Brown, John Butcher, Lie, Loesche, Loesche, Marcello Riggio, Mark C. Butcher, Marsh, Marsh, McKee, Miller, Orstavik, Pratten, Russell, Shauna Culshaw, Sudo, Sudo, Tracy Young, William Johnston   +29 more
core   +3 more sources

Model Systems of Human Intestinal Flora, to Set Acceptable Daily Intakes of Antimicrobial Residues [PDF]

, 2000
The veterinary use of antimicrobial drugs in food producing animals may result in residues in food, that might modify the consumer gut flora. This review compares three model systems that maintain a complex flora of human origin: (i) human flora ...
Cemiglia CE, Corpet DE, Corpet DE Antibiotic residues and drug resistance in human intestinal flora, Corpet DE Antibiotic resistance from food, Corpet DE Current status of models for testing antibiotic residues, Freter R, Licht TR, Rollins LD, Tancrede C, Vollaard El   +9 more
core   +2 more sources

Exploring small-scale chemostats to scale up microbial processes: 3-hydroxypropionic acid production in S. cerevisiae

Microbial Cell Factories, 2019
Background The physiological characterization of microorganisms provides valuable information for bioprocess development. Chemostat cultivations are a powerful tool for this purpose, as they allow defined changes to one single parameter at a time, which ...
Alicia V. Lis, Konstantin Schneider, Jost Weber, Jay D. Keasling, Michael Krogh Jensen, Tobias Klein   +5 more
doaj   +1 more source

Dynamics of an unstirred chemostat model with Beddington–DeAngelis functional response

Frontiers in Physics, 2023
This paper deals with an unstirred competitive chemostat model with the Beddington–DeAngelis functional response. With the help of the linear eigenvalue theory and the monotone dynamical system theory, we establish a relatively clear dynamic ...
Wang Zhang, Hua Nie, Zhiguo Wang
doaj   +1 more source

Stochastic analysis of a full system of two competing populations in a chemostat [PDF]

, 2017
This paper formulates two 3D stochastic differential equations (SDEs) of two microbial populations in a chemostat competing over a single substrate. The two models have two distinct noise sources.
Smith, Frank, Valayudhan, Ajoy, Voulgarelis, Dimitrios   +2 more
core   +2 more sources

A comparative study of peroxisomal structures in Hansenula polymorpha pex mutants [PDF]

, 2007
In a recent study, we performed a systematic genome analysis for the conservation of genes involved in peroxisome biogenesis (PEX genes) in various fungi.
Klei, Ida J. van der,, Koek, Anne,, Komori, Masayuki,, Veenhuis, Marten,   +3 more
core   +2 more sources