M.A. Thesis:

Production of silver nanoparticles using enamel and antibacterial properties of medicinal plants

Silver nanoparticles are of interest for biological and medical applications. But in chemical methods, some toxic reactants remain that are in contrast with principles of green chemistry. Then a variety of biological systems are used. But these systems due to high supply and maintenance costs are used lower. Plants and crops as renewable resources cheap have been used to produce bio regarded nanomaterials. Plants with secondary compounds such as phenols, flavonoids could use for reduction chemical reactions. In this project, silver nanoparticles synthesized using aqueous extracts of Sclerorhachis platyrachis. Because synthesis of nanoparticles in this study is based on reduction, reducing power (antioxidant) for extracts of the plant was evaluated using DPPH method. Also, Antibacterial properties of the aqueous extract containing silver nanoparticles were measured on a number of bacteria. In addition, silver nanoparticles was characterized by ultraviolet-visible spectroscopy, particle size analysis and transmission electron microscopy technique. Different parameters such as pH, concentration of extract, concentration of silver salt and reaction time considered on the synthesis of nanomaterials. The study consists of five chapters respectively. In the first chapter, the botanical generalities and secondary compounds of the plant are discussed. In the second chapter, nanotechnology and green chemistry were studied. In the third chapter, a review of the research carried out in this field has been made. The fourth chapter includes the experimental part related to the present research. And in the end, Chapter Five has been discussing and concluding about the research.

Keywords: Sclerorhachis platyrachis, Silver nanoparticles, Antioxidant activity, Antibacterial activity.