Graziella Malandrino

Prof. Dr. Graziella Malandrino

Dipartimento di Scienze Chimiche, Università degli Studi di Catania, V.le A. Doria 6, 95125 Catania Italy.
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Research Focus & Metrics

Academic Career Length

36Years (1991-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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2 July 2021 in Molecules
Verified
Journal Article
Open access
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GGGiuseppe Granata
Giuseppe Granata
Stefano StracquadanioStefano Stracquadanio
Stefano Stracquadanio
MLMarco Leonardi
Marco Leonardi
Edoardo NapoliEdoardo Napoli
Edoardo Napoli
Graziella MalandrinoGraziella Malandrino
Graziella Malandrino
Corrada GeraciCorrada Geraci
Corrada Geraci
The use of natural compounds with biocidal activity to fight the growth of bacteria responsible for foodborne illness is one of the main research challenges in the food sector. This study reports the preparation and physicochemical characterization of chitosan nanoparticles loaded with Thymus capitatus (Th-CNPs) and Origanum vulgare (Or-CNPs) essential oils. The nanosystems were obtained by ionotropic gelation technique with high encapsulation efficiency (80–83%) and loading capacity (26–27%). Nanoparticles showed a spherical shape, bimodal particle size distribution, and good stability (zeta potential values > 40 mV). The treatment of the nanosuspensions at different temperatures (4 and 40 °C) and storage times (7, 15, 21, and 30 days) did not affect their physicochemical parameters and highlights their reservoir ability for essential oils also under stressful conditions. Both Or-CNPs and Th-CNPs exhibited an enhanced bactericidal activity against foodborne pathogens (S. aureus, E. coli, L. monocytogenes) than pure essential oils. These ecofriendly nanosystems could represent a valid alternative to synthetic preservatives and be of interest for health and food safety.

1 July 2007 in Coordination Chemistry Reviews
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Journal Article
Closed access
GCGuglielmo Condorelli
Guglielmo Condorelli
Graziella MalandrinoGraziella Malandrino
Graziella Malandrino
IFIgnazio L. Fragalà
Ignazio L. Fragalà

24 November 2003 in Macromolecular Rapid Communications
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Journal Article
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FBFrancesco A. Bottino
Francesco A. Bottino
EFElena Fabbri
Elena Fabbri
IFIgnazio L. Fragalà
Ignazio L. Fragalà
Graziella MalandrinoGraziella Malandrino
Graziella Malandrino
AOAlice Orestano
Alice Orestano
Antonino PollicinoAntonino Pollicino
Antonino Pollicino

14 January 1991 in Applied Physics Letters
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Journal Article
Closed access
Graziella MalandrinoGraziella Malandrino
Graziella Malandrino
DRDarrin S. Richeson
Darrin S. Richeson
TMTobin J. Marks
Tobin J. Marks
DDDonald C. DeGroot
Donald C. DeGroot
JSJon L. Schindler
Jon L. Schindler
CKCarl R. Kannewurf
Carl R. Kannewurf
Films of the Tl2Ba2Can−1CunO2n+4 high Tc superconductors (n=2 or 3) can be prepared with a high degree of phase selectivity using a combination of metalorganic chemical vapor deposition (MOCVD) and vapor diffusion. Ba-Ca-Cu-O films are first prepared by MOCVD using the volatile metalorganic precursors Ba(hexafluoroacetyl- acetonate)2(tetraglyme), Ca(dipivaloylmethanate)2, and Cu(acetylacetonate)2. The ‘‘second-generation’’ barium precursor exhibits significantly improved thermal stability and volatility over previously used compounds. Thallium is then incorporated into these films by vapor diffusion using a Tl-Ba-Ca-Cu oxide mixture of controlled composition as the source of volatile thallium oxides. Phase control is achieved by a combination of improved stoichiometry of the deposited film, a result of the new Ba source, and annealing with the appropriate oxide mixture. The resultant films consist predominantly of the Tl2Ba2Ca2Cu3Ox or Tl2Ba2CaCu2Ox phase, each having preferential orientation of the crystallite Cu-O planes parallel to the substrate surface. The films exhibit superconducting onset temperatures of ∼115 K with zero resistance by 93 and 85 K, respectively. Critical current densities for a number of films, estimated by the Bean method, are in the range 104–105 A/cm2 at 5 K.