2024. DETERMINING THE ALGAE CELL DENSITY AND TOTAL CAROTENOID CONTENT OF HETEROTROPHIC MARINE MICROALGAE - SCHIZOCHYTRIUM AND THRAUSTOCHYTRIUM ON THE COAST OF TRA VINH PROVINCE, VIETNAM. TRA VINH UNIVERSITY JOURNAL OF SCIENCE. 13, 1 (Nov. 2024). DOI:https://doi.org/10.35382/tvujs.13.1.2023.1718.