Showing 2 results for Silver Nanoparticle
Dr Seyed Reza Hashemi, Eng Negin Akhondpor, Dr Ayoub Farhadi, Eng Elnaz Arabiyan,
Volume 10, Issue 4 (12-2023)
Abstract
The aim of this study was to investigate the effective genes on apoptosis (BAX and Bcl2) in liver and intestinal cells of broiler chickens fed silver nanoparticles coated on clinoptilolite under acute heat stress induction. 450 d old broiler chicks (Cobb 500) were used in five treatments and six repetitions, and 15 pieces were used in each experimental unit in the form of a completely random design. Experimental diets were: 1) control or basal diet 2) basal diet supplemented by 1% clinoptilolite 3) basal diet supplemented by 1% clinoptilolite coated with 0.5% nanosilver 4) basal diet supplemented by 0.15% organic acid and 5) basal diet supplemented by 1% clinoptilolite coated with 0.5% nanosilver and 0.15% organic acid. Silver nanoparticles coated on clinoptilolite were investigated using XRF and FTIR techniques. In order to induce heat stress, the birds were affected by heat stress for one week in the last week of the breeding period, and on the last day of the stress, liver and intestine samples were obtained to check gene expression. The results of this experiment show that the treatments of clinoptilolite and silver nanoparticles coated on clinoptilolite have an increasing effect on the expression of Bcl2 and Bax, while this effect was not seen in the organic acid treatment. In conclusion, it could be said that if silver nanoparticles are used in feeding livestock and poultry, it is better to use organic acid supplements to reduce the side effects of silver nanoparticles.
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.
