Personne

Simon Crelier

Publications associées (6)

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A classification methodology for the automatic detection of start- and endpoints of chemical and biotechnological reaction systems from spectral reaction data is proposed. In the calibration phase, several batch experiments must be conducted covering the e ...

2007

Information extraction from the Evolving Factor Analysis

Simon Crelier, Michael Amrhein

The goal of our project (HES-SO n°11246) is to develop chemometric methods that enhance the development of chemical reactions. Semi-batch experiments are performed using a fully automated chemical reactor. Real-time analytical data, infrared (IR) spectra f ...

2005

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A novel method for the detn. of partition coeffs. in aq.-org. two-phase systems is described. It is applicable for characterizing the distribution of substances undergoing proton dissocn. in the aq. phase. The method is based on titrn. by means of the org. ...

1993

Process development for the optical resolution of phenylalanine by means of chymotrypsin in a liquid-liquid-solid three-phase reaction system

Albert Renken, Simon Crelier

The stereospecific hydrolysis of phenylalanine esters by chymotrypsin can avantageously be undertaken in aq.-org. 2-phase systems. The partitioning of the deprotonated form of the substrate changes the pH characteristics of the reaction system drastically. ...

Elsevier1992

Enzymic reaction in a three-phase liquid-liquid-solid catalyst system. Application to the optical resolution of phenylalanine

Albert Renken, Simon Crelier

The development of a phasic system for the enzymic resoln. of racemic phenylalanine (I) up to benchtop pilot plant scale is described. The principle is based upon the hydrolysis of racemic Pr ester of I with immobilized a-chymotrypsin (II) in which only th ...

1991

Enzymic ester hydrolysis in liquid two-phase systems for the preparation of L-phenylalanine

Albert Renken, Simon Crelier

L-Phenylalanine was produced from phenylalanine Pr esters by chymotrypsin in 2-phase systems (org. phase using iso-Bu Me ketone and aq. phase). Control of pH during the enzymic reaction was crit. The reaction was carried out in a batch fermentor or a fixed ...

1988