This work aimed to synthesize and characterize a biocompatible hydrogel of alginate and chitosan enriched with iron sulfide nanocrystals. Three concentrations of iron sulfide nanocrystals (FeS2NCs) 0. 03905. 0. https://www.spidertattooz.com/China-Glaze-Don-t-Be-Sea-Salty-0-5-oz-84202-p11948/