Nurbani, S. Z.; Sumandiarsa, I. K.; Hidayah, L. N.; Siregar, R. Y. Alginate Characteristics and Fucoxanthin Content from Sargassum Polycystum Through Ultrasound-Assisted Extraction and the Relationship With Water Quality of Habitat. POl. J. Natur. Sc. 2023, 37.