Effect of SiO2 NPs on increase of active compounds in leave callus of Tagetes erecta L. (Marigold) plant in vitro. Journal of Pharmaceutical Negative Results [Internet]. 2022 Oct. 7 [cited 2026 Jun. 5];13(4):86-92. Available from: https://pnrjournal.com/index.php/home/article/view/1437