Optimization of Agitation Rate in Bioreactor Increases Chitinase Activity of Serratia marcescens PT6Amara Faiz Wriahusna, Niswah Umhudloh Dzakiyya, Indun Dewi Puspita and Sri PudjirahartiE3S Web Conf., 147 (2020) 03019DOI: https://doi.org/10.1051/e3sconf/202014703019