Antibacterial Nanoparticles with Natural Photosensitizers Extracted from Spinach Leaves

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00551259" target="_blank" >RIV/61388955:_____/22:00551259 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/22:10445190
Result on the web
<a href="http://hdl.handle.net/11104/0326699http://hdl.handle.net/11104/0326699" target="_blank" >http://hdl.handle.net/11104/0326699http://hdl.handle.net/11104/0326699</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsomega.1c06229" target="_blank" >10.1021/acsomega.1c06229</a>

Result language
angličtina
Original language name
Antibacterial Nanoparticles with Natural Photosensitizers Extracted from Spinach Leaves
Original language description
We prepared antibacterial polystyrene nanoparticles (NPs) with natural photosensitizers from chlorophyll (Chl) extract via a simple nanoprecipitation method using the same solvent for dissolution of the polystyrene matrix and extraction of Chls from spinach leaves. A high photo-oxidation and antibacterial effect was demonstrated on Escherichia coli and was based on the photo generation of singlet oxygen O-2((1)Delta(g)), which was directly monitored by NIR luminescence measurements and indirectly verified using a chemical trap. The photoactivity of NPs was triggered by visible light, with enhanced red absorption by Chls. To reduce the quenching effect of carotenoids (beta-carotene, lutein, etc.) in the Chl extract, diluted and/or preirradiated samples, in which the photo-oxidized carotenoids lose their quenching effect, were used for preparation of the NPs. For enhanced photo-oxidation and antibacterial effects, a sulfonated polystyrene matrix was used for preparation of a stable dispersion of sulfonated NPs, with the quenching effect of carotenoids being suppressed.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10403 - Physical chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)