Al-asbahi, M.G.S.S., Al-Ofiri, B.A., Saad, F.A.A., Alnehia, A. and Al-Gunaid, M.Q.A. 2024. The Biological Production of Titanium Dioxide Nanoparticles by a Combination Culture of Lactobacillus sp. and Bacillus sp. and Assessment of their Bioactivity. Sana’a University Journal of Applied Sciences and Technology . 2, 3 (Jun. 2024), 223–231. DOI:https://doi.org/10.59628/jast.v2i3.792.