Author(s)

Prisca Nneka Onuoha¹, Nuria Chinonyerem Oganezi¹, Christopher Uche Okoronkwo¹, Uzoaga Linda Nkiruka¹, Peter Azikiwe Onwualu²

¹Department of Food Science and Technology, Abia State University, Uturu, Nigeria.
²African University of Science and Technology, Abuja, Nigeria.

The antioxidant of seeds was carried out using extracts from methanol and Silver Nanoparticles from the spice. The SEM shows the shapes, dispersion and agglomeration of the sample, while the EDX confirms the SEM and the presence of some compounds. The FT-IR reveals the AgNP_s capping and reducing the particular biomolecule from the functional group for identification. Compounds found in the FT-IR seeds of Capsicum annum are Ag L (Silver iodide), C K (Cyanogen chloride), P K (Phenol). Monodora myristica are Mo L (Molybdenum), Ag L (Silver iodide), C K (Cyanogen chloride), P K (Phenol), Mg K (Magnesium). Piper guineense are Ag L (Silver iodide), Ci K (Potassium chloride), C K (Cyanogen chloride), P K (Phenol). The seeds show that the AgNP_S of CA and MM has a better antioxidant activity than the methanol of CA and MM, while the PG methanol has a better activity than the AgNP_S PG. The control (Catechin and Galic acid) has a slight overall better DPPH activity than the AgNP_S. It is important to note that there is a concentration dependency in CA, MM AgNP_S, PG methanol respectively. Notably, at CA methanol, the conc. at 125 was higher than the conc. at 250. Hence, there is need to create a great part in using plant samples for making tabulated or capsulated drugs for treatment of diseases and using plant silver nanoparticles to develop a healthy food/drug preservative package material “smart packaging” that will enhance shelf-life.

Piper guineense (PG) or Uziza, Monodora myristica (MM) or Ehuru and Capsicum annum (CA) or Cayenne Pepper, Scanning Electron Microscope/Energy Dispersive X-Ray (SEM/EDX), Silver Nanoparticles (AgNP_s), Fourier-Transform Infrared (FT-IR), 2, 2-Diphenyl-1-Picryl-Hydrazyl Radical Scavenging (DPPH), Silver Nitrate (AgNO3)

Onuoha, P. , Oganezi, N. , Okoronkwo, C. , Nkiruka, U. and Onwualu, P. (2022) Comparison of Antioxidant Activities of Silver Nanoparticles and Methanol Extracts of Three Indigenous Nigeria Herbal Seeds. Food and Nutrition Sciences, 13, 702-719. doi: 10.4236/fns.2022.137051.