*4.1. Reagents and Chemicals*

Following solvents were used: Sigma-Aldrich methanol ≥ 99.9% Cat No. 34860; ethanol ≥ 99.8% Cat No. 51976; chloroform ≥ 99% Cat No. C7559; hexane ≥ 99% Cat No. 139386. Following reagents were used for fatty acid purification and identification: BF3-methanol (boron-trifluoride methanol, Supelco®, CAS Number: 373-57-9, Cat No. 15716) for derivatization; Sigma-Aldrich tricosanoic acid analytical standards (Sigma-Aldrich–C23–Methyl tricosanoate, CAS Number: 2433-97-8, Cat No. T9900) as internal standard; Supelco® 37 Component FAME Mix, Cat No. CRM47885n, Marine source, Cat No. 47033, and Bacterial Mix, Cat No. 47080-U for fatty acid identification.
