Browsing by Subject "Phenols"

Article

Absorption-enhanced reforming of phenol by steam over supported Fe catalysts

Polychronopoulou, Kyriaki; Bakandritsos, Aristides; Tzitzios, Vasileios; Fierro, José Luis García; Efstathiou, Angelos M. (2006)

Supported Fe catalysts of varying support chemical composition prepared by sol-gel and incipient wetness impregnation methods were studied for the steam reforming of phenol (one of the main constituents of tar produced ...

Article

A comparative study of the steam reforming of phenol towards H2 production over natural calcite, dolomite and olivine materials

Constantinou, D. A.; Fierro, José Luis García; Efstathiou, Angelos M. (2010)

Pre-calcined (air, 850 °C) naturally occurring calcite, dolomite and olivine materials were studied for phenol steam reforming towards H2 production. The effect of reaction temperature, feed volume flow rate, and hydrogen ...

Article

In vitro antioxidant activity and phenolic content of Cedrus brevifolia bark

Cretu, E.; Salminen, J. -P; Karonen, M.; Miron, A.; Charalambous, Christina; Constantinou, Andreas I.; Aprotosoaie, A. C. (2014)

A raw extract and four extractive fractions were obtained from Cedrus brevifolia (Cyprus cedar) bark. They were all studied regarding the phenolic content and profile using spectrophotometry and HPLC-DAD-ESI-MS. The ...

Article

Low-temperature conversion of phenol into CO, CO 2 and H 2 by steam reforming over La-containing supported Rh catalysts

Constantinou, D. A.; álvarez-Galván, M. C.; Fierro, José Luis García; Efstathiou, Angelos M. (2012)

The steam reforming of phenol in the low-temperature range of 350-550°C was studied over 0.5wt% Rh supported on Ce 0.15Zr 0.85O 2, Zr 0.93La 0.07O 2, and Ce 0.13Zr 0.83La 0.04O 2 mixed metal oxides. The reforming specific ...

Article

Low-temperature purification of gas streams from phenol by steam reforming over novel supported-Rh catalysts

Constantinou, D. A.; Efstathiou, Angelos M. (2010)

The purification of gas streams from phenol at low-temperatures (350-550 °C) was investigated by its reaction with steam over novel catalytic systems, namely 0.5 wt% Rh supported on Ce0.15Zr0.85O2, Ce0.15Zr0.83Mg0.02O2 and ...

Article

Open-tubular capillary electrochromatography using a polymeric surfactant coating

Kamande, M. W.; Kapnissi‐Christodoulou, Constantina P.; Zhu, X.; Akbay, C.; Warner, I. M. (2003)

A stable polyelectrolyte multilayer (PEM) coating was investigated for use in open-tubular capillary electrochromatography (o-CEC). In this approach, the PEM consisted of the cationic polymer of a quaternary ammonium salt, ...

Article

The phenol steam reforming reaction over MgO-based supported Rh catalysts

Polychronopoulou, Kyriaki; Fierro, José Luis García; Efstathiou, Angelos M. (2004)

The phenol steam reforming reaction toward H2 formation has been investigated in the 575-730°C range over MgO, CeO2, and ZrO 2 single metal oxides and various mixed metal oxides such as Mg-Ce-O, Mg-Zr-O, and Mg-Ce-Zr-O, ...

Article

The phenol steam reforming reaction towards H2 production on natural calcite

Constantinou, D. A.; Fierro, José Luis García; Efstathiou, Angelos M. (2009)

The steam reforming of phenol towards H2 production was studied in the 650-800 °C range over a natural pre-calcined (air, 850 °C) calcite material. The effects of reaction temperature, water, hydrogen, and carbon dioxide ...

Article

Phenoxodiol (2H-1-benzopyran-7-0,1,3-(4-hydroxyphenyl)), a novel isoflavone derivative, inhibits DNA topoisomerase II by stabilizing the cleavable complex

Constantinou, Andreas I.; Husband, A. (2002)

Cancer therapeutic drugs that inhibit DNA topoisomerase (topo) II by stabilizing the cleavable complex are collectively known as topo II poisons. Phenoxodiol is a synthetic derivative of the plant isoflavone daidzein and ...

Article

Phenoxodiol, a novel isoflavone derivative, inhibits dimethylbenz[a]anthracene (DMBA)-induced mammary carcinogenesis in female Sprague-Dawley rats

Constantinou, Andreas I.; Mehta, R.; Husband, A. (2003)

The present study was undertaken to evaluate the potential cancer chemopreventive effects of novel synthetic derivatives of isoflavones. Initially these agents were tested in a mouse mammary organ culture (MMOC) model. ...

Article

Spillover of labile OH, H, and O species in the H2 production by steam reforming of phenol over supported-Rh catalysts

Polychronopoulou, Kyriaki; Efstathiou, Angelos M. (2006)

The aim of this work was to probe the back-spillover of labile O, OH and H species during steam reforming of phenol towards H2 production in the 773-1028 K range over Rh supported on MgO and Mg-Ce-Zr-O mixed-metal oxides. ...

Article

The steam reforming of phenol over natural calcite materials

Constantinou, D. A.; Efstathiou, Angelos M. (2009)

Five natural calcite materials of different geographical origin were studied towards the steam reforming of phenol reaction and the activity results obtained were correlated with some of their physico-chemical properties. ...

Article

The steam reforming of phenol reaction over supported-Rh catalysts

Polychronopoulou, Kyriaki; Costa, Costas N.; Efstathiou, Angelos M. (2004)

The steam reforming of phenol reaction towards H2 production was studied in the 575-730°C range over Rh supported on CeO2, ZrO2 and SiO2 single metal oxides and various mixed metal oxides such as CeO2-SiO2, ZrO2-SiO2 and ...

Article

Structural and electron paramagnetic resonance (EPR) characterization of novel vanadium(V/IV) complexes with hydroquinonate-iminodiacetate ligands exhibiting "noninnocent" activity

Drouza, Chryssoula; Stylianou, Marios; Papaphilippou, Petri Ch; Keramidas, Anastasios D. (2013)

Reaction of KVO3 with 2-[N,N′-(carboxymethyl)aminomethyl]-5-methylhydroquinone (H4mecah) in aqueous solution at pH 8.2 results in the isolation of mononuclear K2[VV(O)2{Hmecah(-3)}]·2H2O complex. On the other hand, reaction ...

Article

Synthesis and aqueous solution properties of multinuclear oxo-bridged vanadium(IV/V) complexes

Drouza, Chryssoula; Keramidas, Anastasios D. (2000)

Reaction of the multifunctional phenolic ligands 2,5-bis[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H6cahq), 2,2'-bis[N,N-bis(carboxymethyl)aminomethyl]-4,4'-isopropylidenedi phenol (H6capd), 2,2',2''-tris[N,N-bis(c ...

Article

Synthesis, structure, magnetic properties and aqueous solution characterization of p-hydroquinone and phenol iminodiacetate copper(ii) complexes

Stylianou, M.; Drouza, C.; Viskadourakis, Z.; Giapintzakis, John; Keramidas, A. D. (2008)

The reaction of Cu2+ acetate monohydrate with 2-[N,N′-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H 4cacp), 2-[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H 4cah) and the dinucleating 2,5-bis[N,N-bis(carboxymethy ...

Article

Synthesis, structure, magnetic properties and aqueous solution characterization of p-hydroquinone and phenol iminodiacetate copper(ii) complexes

Stylianou, Marios; Drouza, Chryssoula; Viskadourakis, Zacharias A.; Giapintzakis, Ioannis; Keramidas, Anastasios D. (2008)

The reaction of Cu2+ acetate monohydrate with 2-[N,N′-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H 4cacp), 2-[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H 4cah) and the dinucleating 2,5-bis[N,N-bis(carboxymethy ...

Article

Tailoring MgO-based supported Rh catalysts for purification of gas streams from phenol

Polychronopoulou, Kyriaki; Giannakopoulos, K.; Efstathiou, Angelos M. (2012)

The present work is focused on the sol-gel synthesis, characterization and catalytic performance evaluation of novel Mg-Ce-Zr-O-based mixed oxides supported Rh catalysts for the purification of H 2-rich gas streams from ...

Article

Vernonia kotschyana roots: Therapeutic potential via antioxidant activity

Vasincu, A.; Paulsen, B. S.; Diallo, D.; Vasincu, I.; Aprotosoaie, A. C.; Bild, V.; Charalambous, Christina; Constantinou, Andreas I.; Miron, A.; Gavrilescu, C. M. (2014)

The roots of Vernonia kotschyana Sch. Bip. ex Walp. (Asteraceae) are used in Malian traditional medicine in the treatment of gastroduodenal ulcers and gastritis. Since oxidative stress is involved in gastric ulceration, ...

Doctoral Thesis Open Access

Σύνθεση και χαρακτηρισμός βιολογικά ενεργών οξειδοαναγωγικών συμπλόκων βαναδίου με πολυφαινολικούς υποκαταστάτες

Βλασίου, Μανώλης Χ. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2017-05)

Στην εργασία αυτή αναπτύχθηκαν νέες μέθοδοι ανάλυσης των πολυφαινολών, συντέθηκαν νέες μεταλλοπολυφαινολικές ενώσεις μοντέλα για τη μελέτη των μεταβολικών μονοπατιών των πολυφαινολών στα τρόφιμα και στους βιολογικούς ...