RandD Institute for Electrical Engineering

Bucharest, Romania

RandD Institute for Electrical Engineering

Bucharest, Romania

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Bancuta O.-R.,University Valahia of Targoviste | Bancuta O.-R.,Water Company from Targoviste | Chilian A.,University Valahia of Targoviste | Chilian A.,Water Company from Targoviste | And 7 more authors.
Revue Roumaine de Chimie | Year: 2015

Due to the high content of polyphenols (strong natural antioxidants), grape skin extracts are a great alternative for artificial antioxidants used in polymers. By FT-IR spectroscopy and UVVIS spectrophotometry it could be indentified not only the presence of these compounds in the extracts, but information was obtained about polyphenols stability to temperature. By FT-IR spectroscopy there have been observed aromatic structures and phenolic OH group characteristic for polyphenols. To identify the phenolic compounds by UV-VIS spectrophotometry, there have been released studies on grape extracts at the wavelengths 280, 252, 286 and 304 nm.


Chilian A.,University Valahia of Targoviste | Chilian A.,Water Company from Targoviste | Bancuta O.-R.,University Valahia of Targoviste | Bancuta O.-R.,Water Company from Targoviste | And 10 more authors.
Revue Roumaine de Chimie | Year: 2015

The electrodes are very important components of dye sensitized solar cells (DSSC). These components must have a high electrical conductivity and a high optical transmittance on a wide spectrum. ZnO and SnO2:F are materials that fall into this category. By SEM it has been studied surface topography and elemental composition to identify the presence of mechanical or compositional defects. Defects of any kind of these materials can decrease efficiency and lifetime of DSSC. Applying statistical analysis to the obtained data it was possible to identify the defects of materials.

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