فهرست مطالب kimia bahrami nejad

Today, the prevalence of foodborne illnesses has led to the widespread use of medicinal plants. This study aims to investigate the antibacterial effect of polylactic acid (PLA) films containing oak ethanolic extracts incorporated with cinnamon essential oil against a range of foodborne pathogens.

The oak extract was obtained by soaking method and the cinnamon essential oil was extracted using a Clevenger apparatus. PLA films containing 2% concentration of oak extract and cinnamon essential oil were prepared, homogenized, cast, and stored at 4°C. Subsequently, the antimicrobial efficacy of various concentrations of the extract against pathogenic bacteria was examined using the disk diffusion method.

The film containing 400 mg/mL of ethanolic extract along with 3% cinnamon, showed the largest non-growth zone (with a diameter of 31.5 mm against Staphylococcus aureus). Furthermore, the film with a concentration of 100 mg/mL of extract displayed the smallest non-growth zone against Salmonella typhimurium, measuring 13.54 mm in diameter.

Based on the obtained results, the combination of oak extract and cinnamon essential oil has a strong inhibitory effect against common foodborne pathogens. Consequently, these substances may be useful for enhancing the safety and extending the shelf life of various food products.

Raw milk is susceptible to environmental pollution and considered to be one of the most perishable food items. The prevailing mode of contamination arises from the consumption of milk with digestive system, mucous secretions, and skin. The bacteria have the capacity to endure in milk for a period of ten days. The contamination of dairy products  to polluted hand hygiene products is one of the contributing factors . The present study aimed to examine the effects of disinfectant solutions, specifically chlorine, with varying concentrations (1%, 2%, and 3%), on the contamination of personnel's hands. ANOVA, also known as one-way analysis of variance, was employed to assess the disparities in means. In order to compare the means at a significant level of 95%, Duncan's test was utilized. The findings exhibited that the presence of chlorine has a noteworthy impact on the abundance of microorganisms. Additionally, an investigation was conducted to assess the impact of MicroZ, alcohol at 68% and alcohol 96% on the reduction of Staphylococcus microbial population. By examining the central indicators and dispersion of the tested communities, the results showed that 68% alcohol has a greater effect on reducing the microbial population than microZ and 96% alcohol.