Plant Biotechnology Persa

en A New Method for Promoting Biologic Synthesis and Reducing the Size of Titanium Dioxide Nanoparticles (Tio2 NPs) Synthesized by Origanum Vulgare Bioactive Compounds نامه به سردبیر Letter to editor <table class="Table" style="width:671px; border-collapse:collapse" width="671"> <tbody> <tr> <td style="width: 520px; padding: 0cm 7px 0cm 4px; height: 73px; text-align: justify;" valign="top">As it is known the particle size is the most important issue in the preparation of nanoparticles. Nowadays, conventional drug therapy is characterized by limited effectiveness and undesirable side effects which are due to the lack of selectivity and poor distribution. Hence, reduction of particle size is considered as an approach to reduce toxicity, increase release and bioavailability, improve solubility, and produce a better formulation for a higher quality. Therefore, reduction of the particle size of nanoparticles is important. We would like to present a new method we used to reduce the particle average size to 64 nm. In the study of Sankar et al. an aqueous extract was used to prepare the nanoparticle and the size of the titanium dioxide nanoparticle synthesized with aqueous Origanum vulgare extract in a Dynamic Light Scattering Analysis was 341 nm. We used hydroalcoholic extract and prepared titanium dioxide nanoparticles by using O. vulgare hydroalcoholic extract. The size of prepared nanoparticles was 64 nm which is about one-fifth of the nanoparticle sizes produced in Renu Sankar et al. study.</td> </tr> </tbody> </table>   titanium dioxide,nanoparticles (Tio2 NPs),Origanum vulgare 10 12 http://pbp.medilam.ac.ir/browse.php?a_code=A-10-25-3&slc_lang=en&sid=1 Mahmoud Bahmani mahmood.bahmani@gmail.com 10031947532846001005 0000000296439274 Yes Biotechnology and Medicinal Plants Research Center, Ilam University of Medical Sciences, Ilam, Iran