“…In addition, our previous study found that antioxidant related metabolites, such as phenolic acids and polyphenols, are very sensitive to environmental stressors. For example, Ag NPs at 0.1 mg/L resulted in a considerable decrease of antioxidant compounds . In contrast, all of the detected antioxidants in Nostoc , including catechin, 4-hydroxycinnamic acid, resveratrol, 1,2,4-benzenetriol, epicatechin, pelargonic acid, 3,4-dihydroxycinnamic acid, chlorogenic acid, and α-tocopherol, were unaffected upon MoS 2 exposure (data not shown).…”