20.500.12556/RUL-169618 Algae as a natural resource of skin protective compounds We present findings from our study on macroalgae (e.g., green Ulva lactuca, brown H. scoparia) and microalgae (e.g., blue Spirulina sp. , green Chlorella sp.), focusing on pigment content, antioxidant and antityrosinase activity, as well as photostability, and photoprotective effects influenced by seasonal changes. Two SPE-derived fractions—methanolic (F3) and dichloromethane (F4)—from lyophilized samples were analyzed with HPLC. Identified were key pigments: lutein, chlorophyll b, and canthaxanthin in green algae; fucoxanthin, lutein, and β-carotene in brown algae; and fucoxanthin, lutein, and chlorophyll b in Chlorella sp.. Spirulina sp. was rich in phycocyanin. Antioxidant activity (e.g. DPPH and ABTS) varied by species, fraction (methanol > chloroform), and season. Fractions from brown algae were also tested for photoprotective features. Exposure to UV-B light did not significantly alter antioxidant activity across samples. algae solvent fractions pigments antioxidant activity skin protection true false true Angleški jezik Ni določen Znanstveno delo 2025-06-06 09:42:51 2025-06-06 09:42:53 2025-06-08 04:25:33 0000-00-00 00:00:00 2025 0 0 7 str. 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 543 238509827 238503171 RAZ_Trebse_Polonca_2025.pdf RAZ_Trebse_Polonca_2025.pdf 1 E13E9B6A8E83BDCB8DAA134C90220663 ebf4a3289fdc5c81d4f3d5254c7683be09a2dc4d5241fdf4e49c1d24ab598176 88fee467-42a8-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211127 https://sed.akademijazs.edu.rs/fajlovi/papers25/proceedings/0-1.pdf 0 697ec9f0-42a9-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=211133 Zdravstvena fakulteta 0 0 0