Penicillin acylase-catalyzed ampicillin synthesis using a pH gradient: a new approach to optimization (niet eerder opgenomen)

Highly efficient synthesis of ampicilin in an "Aqueous slution-precipitate" system: Repetitive addition of substrates in a semicontinuous process.

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Synthesis of penicillin N and isopenicillin N (niet eerder opgenomen)

Enzymatic synthesis of ß-lactam antibiotics by penicillin-G acylase in frozen media