Cover Picture: Biotechnology Journal 6/2017

Schematic representation of a microfluidic side‐entry reactor with reactants of a penicillin G acylase reaction and pH sensors integrated along the reaction channel. The pH sensors enabled real‐time monitoring of the reaction progress in a microfluidic reactor. Alkaline buffers added to the reactor's side‐entries balanced the pH and increased product yield, thereby highlighting the feasibility of pH control. The cover is prepared by Pia Gruber, Marco P.C. Marques, Philipp Sulzer, Roland Wohlgemuth, Torsten Mayr, Frank Baganz and Nicolas Szita authors of the article ”Real‐time pH monitoring of industrially relevant enzymatic reactions in a microfluidic side‐entry reactor (μSER) shows potential for pH control“ ( https://doi.org/10.1002/biot.201600475 ).