İnvestigation of the biological activities of chitin and chitosan obtained from Drassodes lapidosus (Araneae: Gnaphosidae)

One of the most important biopolymers found in nature is chitin and its derivatives. Chitin and its derivative, chitosan, are a product that is widely used in many fields of science and engineering, thanks to its biocompatible, non-toxic and various properties. The aim of this study is to determine the antimicrobial and antioxidant properties of chitin and chitosan obtained from the Drassodes lapidosus spider. To determine antimicrobial properties, E. coli, S. enterica subsp. enteritica, S. aureus pathogenic strains were used. DPPH radical scavenging activity, Copper (II) reducing capacity and Reducing power measurement methods were used to determine antioxidant properties. According to the results obtained, chitin and chitosan obtained using the D. lapidosus spider species showed an antimicrobial effect on pathogenic strains by creating zones with a diameter of 13-16 mm. In addition, it was determined that they showed significant antioxidant properties by the methods studied. As a result, it was determined that chitin and chitosan obtained using the D. lapidosus spider species showed important biological activities such as antimicrobial and antioxidant.