**Author details**

Daniela Simina Stefan1\* and Mircea Stefan2

\*Address all correspondence to: simina\_stefan\_ro@yahoo.com

1 Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania

2 Pharmacy Faculty, University Titu Maiorescu, Bucharest, Romania

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Daniela Simina Stefan1\* and Mircea Stefan2

\*Address all correspondence to: simina\_stefan\_ro@yahoo.com

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2 Pharmacy Faculty, University Titu Maiorescu, Bucharest, Romania

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1 Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest,

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