Mansour Afshar Mohammadian, Shirin Kordi,
Volume 5, Issue 4 (12-2018)
Abstract
Nowadays, the use of a wide range of medicinal herbs such as saffron and its aromatic compounds is increasingly being regarded as natural sources of antioxidant properties. In addition to saffron stigma, saffron petal is a rich herbal source of antioxidant compounds. The present study was conducted in a completely randomized design with three replications to study some of the enzymatic and non-enzymatic antioxidants of two species of wild saffron in Guilan Province compared with agronomic saffron (C. sativus). The results of this study showed that total phenol, flavonoids and anthocyanins in agronomic saffron were significantly higher than those in the other two species. The amount of flavonel in C. speciosus and the level of antioxidant activity (DPPH) in C. caspius were significantly higher than other species. The level of PPO activity in C. sativus and C. speciosus was significantly higher than that in C. caspius. However, there was no significant difference in the level of POD activity among the three studied species. Therefore, according to the results of this study, petals of different species of saffron are good sources of non-enzymatic and enzymatic antioxidants and can be used as an available natural antioxidant in the food and pharmaceutical industries.
Mis Forogh Mohammadi, Mis Maryam Karimi-Dehkordi, Mr Ashkan Pourshahbaz Pourshahbaz,
Volume 12, Issue 1 (3-2025)
Abstract
Consumers in poor nations are at risk from foodborne infections. Nanotechnology may help find food-grade antimicrobials. This research compares the antibacterial effects of silver and copper nanoparticles (NPs) and sodium hypochlorite on food-contaminating pathogens Salmonella typhimurium, Listeria monocytogenes, and Kluyveromyces marxianus. This work chemically produced silver and copper NPs. We discovered the produced nanoparticles' physical and chemical properties. SEM verified morphology and size. Synthesized copper and silver NPs were X-ray diffraction-analyzed. To assess the antibacterial activity of silver, copper NPs, and sodium hypochlorite, the MIC and MBC were defined. Diffusion tests from the well assessed nanoparticle antibacterial activity. SEM micrographs revealed copper and silver nanoparticles' spherical shape. This study found functional group stretching vibrations in silver and copper NPs using FTIR. XRD revealed copper and silver NP crystal structures. In the treatment of infections with varying silver and copper nanoparticle concentrations, non-growth halo indicated antibacterial efficacy. In addition, silver and copper nanoparticles have substantial MIC/MBC against the infections. Producing food packaging materials that are safe and long-lasting requires bacterial sensitivity to nanoparticles. This work synthesized silver and copper NPs to minimize food contamination and health hazards.
