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Polymeric micelles as a new generation of anti-oxidant carriers

Arrigo R., Tzankova Dintcheva N., Catalano G., Morici E., Cavallaro G., Lazzara G., Bruno M.

Polimery

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2017

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T. 62, nr 7-8

525--531

EN

A promising strategy to immobilize a natural stabilizer in polymeric films is presented. Particularly, nevadensin (N, a natural basil flavonoid) molecules have been encapsulated in Pluronic F-127 micelles [F127, a triblock copolymer poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide)] and the obtained nanoparticles have been introduced in poly(ethylene glycol), PEG [otherwise known as poly(ethylene oxide), PEO]. In order to verify the effectiveness of the micelles as anti-oxidant carriers, PEG-based films have been subjected to artificial weathering. The encapsulation of anti-oxidant molecules allows the enhancement of N solubility in PEG, leading to advanced materials with enhanced photo-oxidative stability.

PL

Przedstawiono obiecującą metodę immobilizacji naturalnych przeciwutleniaczy w materiale błon polimerowych. Cząsteczki naturalnego bazyliowego flawonoidu nevadensin (N) poddawano enkapsulacji w micelach tworzących się w roztworze triblokowego kopolimeru poli(tlenek etylenu)-poli(tlenek propylenu)-poli(tlenek etylenu), [PEO-PPO-PEO] – Pluronic F-127 (F127), a otrzymane nanocząstki wprowadzano do matrycy poli(tlenku etylenu) [PEO = PEG, poli(glikolu etylenowego)]. W celu zweryfikowania efektywności miceli jako nośników przeciwutleniaczy, błony wytworzone na bazie PEG poddano procesowi sztucznego starzenia. Stwierdzono, że enkapsulacja cząstek N w micelach F127 zwiększa rozpuszczalność nevadensinu w PEG, co umożliwia otrzymanie nowatorskiego materiału o zwiększonej stabilności fotooksydacyjnej.

2

Chemical Composition and Biological Activity of Essential Oil from Flowerheads of Centaurea polymorpha Lag. (Asteraceae) GrowingWild in Spain

Forimsano C., Senatore F., Bellone G., Bruno M., Grassia A., Raio A., Rigano D.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 4

617-622

EN

The volatile constituents of the flowerheads of Centaurea polymorpha Lag. were extracted by hydrodistillation and analysed by GC and GC-MS. 63 components, amounting to 91.6% of the oil, were identified. Waxes and sesquiterpenes were the most abundant components in the oil. alfa-Cedrene (3.9%), beta-cedrene (3.6%) and beta-curcumene (3.0%) were the most representative sesquiterpene hydrocarbons while caryophyllene oxide (2.6%) was the most abundant oxygen containing sesquiterpene. The study on the biological activity of the oils showed no significant activity.

3

Chemical Composition and Antimicrobial Activity of the Essential Oils from Aerial Parts of Two Marrubium sp. (Lamiaceae) GrowingWild in Lebanon

Grassia A., Senatore F., Arnold A., Bruno M., Piozzi F., Rigano D., Forimsano C.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 4

623-628

EN

The essential oils of aerial parts of Marrubium globosum Montbr. etAuch. ex Benth. ssp. libanoticum (Boiss) Davis and M. cuneatum Banks et Solander (Lamiaceae) growing wild in Lebanon were obtained by hydrodistillation and were analysed by GC and GC-MS. Altogether 64 compounds, representing 93.4% and 91.4% of the oils,were identified. The main components of both oils were beta-caryophyllene (12.4%-5.2%), hexadecanoic acid (7.4%-6.5%) and spathulenol (5.2%-6.5%). Bicyclogermacrene (5.2%) was present only in the oil of M. cuneatum characterized by high amount of germacrene D (15.6%). Oils showed a moderate antimicrobial activity.

4

An Unusual Pregnane Derivative and Dibenzylbutyrolactone Lignans from Centaurea sclerolepis

Erdemgil Z., Rosselli S., Maggio A., Raccuglia R., Celik S., Michalska K., Kisiel W., Bruno M.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 4

647-650