In this study, a mathematical model was proposed and the accuracy of this model was assessed to predict the growth of Pseudomonas aeruginosa and rhamnolipid production under nitrogen limiting (sodium nitrate) fed-batch fermentation. All of the parameters used in this model were achieved individually without using any data from the literature. The overall growth kinetic of the strain was evaluat...

Push–pull tests are a popular technique to investigate various aquifer properties and microbial reaction kinetics in situ. Most previous studies have interpreted push–pull test data using approximate analytical solutions to estimate (generally first-order) reaction rate coefficients. Though useful, these analytical solutions may not be able to describe important complexities in rate data. This ...

T paper is a follow-up work about the number soup model (1). It elaborates more mathematical details; describes more general properties and gives different interpretations of the model in a more heuristic way; and lists some intriguing questions deserved to be investigated more. The paper is organised in the following way. Section 1 shows examples of demographic structures in different n-metabo...

Department of Parasitology, Faculty of Science, Charles University, 12844 Prague, Czech Republic (R.S.); Université Pierre et Marie Curie (Paris 06), Centre National de la Recherche Scientifique Unité Mixte de Recherche 7621, Laboratoire d’Océanographie Microbienne, F–66651 Banyuls/Mer, France (H.B., F.-Y.B.); and Université Paris Diderot (Paris 07), Centre National de la Recherche Scientifique...

First discovered in 1961 by Francois Jacob and Jacques Monod in Paris, regulation genes are a type of gene that provides the instructions for creating proteins which help control the expression of other structural genes. These genes play a key role in gene expression. From the DNA level to the protein level, we see that the protein coding genes, which occupy a small percentage of the genome, ar...

The replicon model, proposed by Jacob and Brenner (1963) to explain the regulation of prokaryotic DNA replication, has proved remarkably robust. Despite the manyvariations in initiation mechanism discovered since 1963, the replicon model may be applicable, with minor modifications, to regulation of DNA replication in all organisms. For several years, the Replicon Club of Paris, a group of Frenc...

If translated with a slight bias: “Who wouldn’t praise a laureate, but would you read him? No. Accepting praise, he still prefers you’d understand him though,” Lessing’s lament appears to apply to science as well as to poetry and seems to be as timely today as it was in the days of Klopstock. It deplores assuming an eminent man’s idea without really taking the pain of reading his original writi...

With the pure bacterial cultures Ancylobacter aquaticus AD20 and AD25, Xanthobacter autotrophicus GJ10, and Pseudomonas sp. strain AD1, Monod kinetics was observed during growth in chemostat cultures on 1,2-dichloroethane (AD20, AD25, and GJ10), 2-chloroethanol (AD20 and GJ10), and 1,3-dichloro-2-propanol (AD1). Both the Michaelis-Menten constants (K(m)) of the first catabolic (dehalogenating) ...

A Monod model has been used to describe the steady state characteristics of the acclimated mesophilic hydrogenotrophic methanogens in experimental chemostat reactors. The bacteria were fed with mineral salts and specific trace metals and a H(2)/CO(2) supply was used as a single limited substrate. Under steady state conditions, the growth yield (Y(CH4)) reached 11.66 g cells per mmol of H(2)/CO(...

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