AU - alijani, hassan AU - Matroodi, Soheila AU - sharafi, ali AU - zamani, isaac TI - Antimicrobial activity of marine actinomycete Nocardiopsis sp. AHA2 synthesized silver nanoparticles against microbial pathogens PT - JOURNAL ARTICLE TA - RJMS JN - RJMS VO - 23 VI - 147 IP - 147 4099 - http://rjms.iums.ac.ir/article-1-3979-en.html 4100 - http://rjms.iums.ac.ir/article-1-3979-en.pdf SO - RJMS 147 ABĀ  - Background: Silver nanoparticles have been widely used in various biomedical applications and drug delivery systems. The biosynthesis of nanoparticles has been proposed as a cost effective environmental friendly alternative to chemical and physical methods. In the present study, synthesis of nanoparticles using a novel Nocardiopsis sp. AHA2 has been attempted. We used culture supernatant of Nocardiopsis sp. AHA2 for the biologically synthesis of silver nanoparticles and study of its antimicrobial activity. Methods: marine Sediment samples were collected from depth of 10th centimeter. Serial dilution was mad for screening of marine actinomycetes using SCA medium. After Isolation and characterization of Nocardiopsis sp. AHA2, The reduction of silver ions occurred when silver nitrate solution (0.01 M) was treated with the Nocardiopsis sp. AHA2 culture supernatant at room temperature. nanoparticles were characterized by UV-visible, Zeta potential. Antimicrobial activity of the prepared silver nanoparticles against bacteria and fungi pathogens was assayed using well diffusion assay. Results: Silver nanoparticles were successfully synthesized in the culture supernatant of Nocardiopsis sp. AHA2. During the experiment, the appearance of a dark brown color indicated the formation of silver nanoparticles. In the UV-visible spectrum, maximum peak was observed between 420 nm, indicating the presence of AgNPs. AgNPs displayed antimicrobial activity against all used pathogenic microorganisms. Nocardiopsis sp. AHA2 can be a good candidate for the synthesis of the AgNPs using silver nitrate. CP - IRAN IN - 1- Department of Marine biology, Faculty of Marine Science, Khoramshahr University of marine science and technology, Iran. LG - eng PB - RJMS PG - 74 PT - Research YR - 2016