Dulanlebit, Y.H. et al. 2026. Technopreneurship and Market Feasibility of Modified Carrageenan Hydrogel for Industrial Heavy Metal Remediation. Aptisi Transactions on Technopreneurship (ATT). 8, 1 (Jan. 2026), 199–210. DOI:https://doi.org/10.34306/att.v8i1.622.