Sekundarni povzetek: |
Mango is considered the most farmed tropical fruit in the world. In addition to fresh fruit, you can process it into juices, nectars, concentrates, and marmalades, but during the processing itself remains a lot of waste material, such as peels, which are a serious environmental problem. However, flat peels are a rich source of polyphenol compounds, flavonoids, and vitamin C and have antimicrobial and antioxidant properties.
For the implementation of the experimental part of the thesis, we prepared four samples, aqueous extract of dry mango peels, ethanolic extract of dry mango peels, aqueous extract of fresh mango peels, and ethanolic extract of fresh mango peels and analyzed using spectrophotometric analysis.
The antimicrobial activity of isolates was assessed using Kirby-Bauer and microdilution Method. By measuring the inhibition zone, the Kirby – Bauer method determined the inhibitory properties of isolates on the growth of various micro-organisms, namely Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), Gram-positive bacteria (Staphylococcus aureus and Bacillus cereus) and fungi (Candida albicans and Aspergillus brasiliensis).With microdilution method only to determined the antimicrobial activity of isolates on bacterial growth, as previously using the Kirby-Bauer method achieved only successful inhibition of bacterial growth. Using the microdilution method, we determined the minimum inhibitory concentration of isolates and monitored the development of the bacterium.
Spectrophotometric analyses of samples confirmed higher total phenol content, proanthocyanidin, and the higher antioxidant activity of ethanol extracts compared to aqueous extracts. From the measured inhibition zones, the Kirby-Bauer method demonstrated antimicrobial activity on the growth of Gram-positive and Gram-negative bacteria, while the samples tested did not inhibit the growth of fungi. The results of the microdilution method showed that antimicrobial properties expressed in Gram-positive bacteria compared to Gram-positive bacteria compared to Gram-negative.
Based on the results obtained, we have demonstrated that manga peels are a rich source of bioactive agents, including antimicrobial and antioxidant activity. Therefore, in the future, it can be used in various industries such as cosmetics, food, and pharmaceuticals. Their further use could reduce the amount of waste material generated during the recovery of mangos, thus reducing the environmental impact of waste. |