Immobilisation of both enzymes and whole‐cell systems is of major importance in the
improvement of the stability, activity and reusability of these biocatalysts. This review …

The essential amino acid L-tryptophan can be produced by a condensation reaction
between indole and L-serine, catalyzed by whole cells of Escherichia coli B1t-7A with …

Background: L-tryptophan is an important ingredient in medicines, especially in
neuromedicines such as antidepressants. Many commercial processes employ various …

Diffusion into and from κ‐carrageenan gel beads was studied, both in the absence and
presence of bacterial cells, both with and without biochemical reaction. The solutes were …

Carrageenan is a naturally occurring polysaccharide obtained from seaweeds. This chapter
provides a general overview of various types of carrageenans isolated from red seaweeds …

Background: L-tryptophan is used widespread in the pharmaceutical industry. The majority
of L-Trp production depends on microbial processes that produce L-tryptophan from indole …

A number of tyrosine plus phenylalanine double auxotrophic mutants were isolated by N-
methyl-N-nitro-N-nitrosoguanidine (MNNG) treatment of a locally isolated strain of …

The liquid-impelled loop reactor was studied with respect to hydrodynamics and liquid−
liquid mass transfer. The system involved a continuous aqueous phase, a dispersed organic …

Considering the process conditions the bioprocess model is used to decide the optimal
control. The result of the optimal process control is 50% shorter process time for a complete …

The aminoacid L-tryptophan can be produced by the condensation reaction between indole
and L-serine catalysed by tryptophanase (EC 4.1. 99.1). This route has a major drawback …