Naslov
Green synthesis of silver nanoparticles using nettle (Uritca dioica L.), myrtle (Myrtus communis L.) and bay laurel (Laurus nobilis L.) leaf extracts

Autori
Cegledi, Ena ; Dobroslavić, Erika ; Dobrinčić, Ana ; Cvitković, Daniela ; Mrvčić, Jasna ; Dragović- Uzelac, Verica

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Natural resources, green technology and sustainable development, Book of abstratcs / Radojčić Redovniković, Ivana ; Jakovljević, Tamara ; Stojaković, Renata ; Erdec, Dina ; Damjanović, Anja - Zagreb : Prehrambeno-biotehnološki fakultet Sveučilišta u Zagrebu, 2022, 133-133

Skup
4th Natural resources, green technology and sustainable development/4 (GREEN2022)

Mjesto i datum
Zagreb, Hrvatska, 14.09.2022. - 16.09.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
antimicrobial activity, green synthesis, plant extracts, silver nanoparticles

Sažetak
In recent years, silver nanoparticles (AgNPs) have gained interest in the research community due to their unique physico-chemical and biological properties which allow for their strong antimicrobial activity against a variety of bacteria, viruses and fungi. Various methods such as sol-gel method, chemical vapour deposition or thermal decomposition can be applied for the synthesis of AgNPs. however they often include the use of toxic chemicals. Therefore, biogenic synthesis using plant extracts has emerged as an environmentaly friendly method where different bioactive molecules Oxidize the Ag+ to Ag0, leading to the formation of nanoparticles. Medicinal plants such as nettle (Urtica dioica L), myrtle (Myrtus communis L) and bay laurel (Laurus nobilis L) contain a variety of bioactive molecules such as phenolic compounds, organic acids, tocopherols and terpenoids which give them potential for use in the green synthesis of AgNPs. The synthetized nanoparticles are most often monitored by UV-visible spectroscopy since the conducting electrones in the outer orbital of AgNPs oscillate in resonance with certain wavelengths. The peaks in the area near 335-560 nm generally confirm the reduction of silver nitrate into AgNPs, while the absence of peaks indicates the absence of NP aggregation. In the present research, nettle, myrtle and bay laurel leaf water extracts were used to prepare silver nanoparticles by reducing the Ag+ ions from a 1 mM silver nitrate solution to Ag0. The formation of nanoparticles was confirmed by UV/Vis spectroscopy where peaks were detected at 320 nm, 400 nm and 480 nm for nettle, myrtle and bay laurel extracts, respectively. Antimicrobial activity of the synthetized nanoparticles against Bacillus subtilis, Pseudomonas aeruginosa, Staphylococcus aureus, Salmonella thyphimurium, Enterococcus faecalis, Escherichia coli and Listeria monocytogenes was investigated and compared to the antimicrobial activity of the plant extracts.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA