Athanasios Konstandopoulos PhD | Aristotle University (original) (raw)
Uploads
Papers by Athanasios Konstandopoulos PhD
Sae Transactions, 1999
Bookmarks Related papers MentionsView impact
A two-step thermo-chemical cycle process for solar hydrogen production from water has been develo... more A two-step thermo-chemical cycle process for solar hydrogen production from water has been developed. By using mixed iron-oxide-based redox systems at moderate temperatures the cycle offers promising properties concerning thermodynamics and efficiency and affords pure ...
Bookmarks Related papers MentionsView impact
SAE Technical Paper Series, 1988
Bookmarks Related papers MentionsView impact
International Journal of Hydrogen Energy, Apr 1, 2014
Bookmarks Related papers MentionsView impact
Sae Transactions, 2005
Bookmarks Related papers MentionsView impact
Energy & Fuels, 2016
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Chemical Engineering Science, Jul 31, 2003
Bookmarks Related papers MentionsView impact
Catalysis Today, Sep 30, 2007
Bookmarks Related papers MentionsView impact
Fuel and Energy Abstracts, 2011
Bookmarks Related papers MentionsView impact
Industrial Engineering Chemistry Research, Jun 3, 2002
Bookmarks Related papers MentionsView impact
Granul Matter, 2008
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Sae Transactions, Mar 3, 2003
... Auteur(s) / Author(s). KONSTANDOPOULOS Athanasios G. ; Résumé / Abstract. In the present work... more ... Auteur(s) / Author(s). KONSTANDOPOULOS Athanasios G. ; Résumé / Abstract. In the present work a practice for conducting experiments and analyzing the fundamental descriptors of DieselParticulate Filter (DPF) flow resistance behavior is described. ...
Bookmarks Related papers MentionsView impact
Aquatic Toxicology, 2016
Nanoparticles (NPs), due to their increased application and production, are being released into t... more Nanoparticles (NPs), due to their increased application and production, are being released into the environment with unpredictable impact on the physiology of marine organisms, as well as on entire ecosystems and upcoming effects on human health. The aim of the present study was to evaluate and compare the oxidative responses of the mussel Mytilus galloprovincialis after exposure to iron oxide NPs and to iron oxide NPs incorporated into zeolite for 1, 3 and 7 days. Our results showed that both effectors induced changes on animal physiology by causing oxidative stress in hemocytes of exposed mussels compared to control animals. This was shown by the significant increase in reactive oxygen species (ROS) production, protein carbonylation, lipid peroxidation, ubiquitin conjugates and DNA damage. In addition an increase in prooxidant levels as measured by the prooxidant-antioxidant balance (PAB) assay was observed in exposed mussels' hemolymph. The results show that ROS, DNA damage, protein and lipid oxidation, ubiquitin conjugates and PAB could constitute, after further investigation, reliable biomarkers for the evaluation of pollution or other environmental stressors. In addition, more studies are needed in order to ensure the safety of these NPs on various biomedical applications, since it is critical to design NPs that they meet the demands of application without causing cellular toxicity.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
J Aerosol Sci, 1997
Bookmarks Related papers MentionsView impact
... 2002. [4] Z. Yue, L. Li, J. Zhou, H. Zhang and Z. Gui, Preparation and characterization of Ni... more ... 2002. [4] Z. Yue, L. Li, J. Zhou, H. Zhang and Z. Gui, Preparation and characterization of NiCuZn ferrite nanocrystalline powders by auto-combustion of nitrate-citrate gels, Materials Science and Engineering B, 64, 68-72, 1999. [5 ...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
International Journal of Nanomedicine, 2015
The axonal translocation of two commonly used nanoparticles in medicine, namely CeO2 and SiO2, is... more The axonal translocation of two commonly used nanoparticles in medicine, namely CeO2 and SiO2, is investigated. The study was conducted on frog sciatic nerve fibers in an ex vivo preparation. Nanoparticles were applied at the proximal end of the excised nerve. A nerve stimulation protocol was followed for over 35 hours. Nerve vitality curve comparison between control and exposed nerves showed that CeO2 has no neurotoxic effect at the concentrations tested. After exposure, specimens were fixed and then screen scanned every 1 mm along their length for nanoparticle presence by means of Fourier transform infrared microscopy. We demonstrated that both nanoparticles translocate within the nerve by formation of narrow bands in the Fourier transform infrared spectrum. For the CeO2, we also demonstrated that the translocation depends on both axonal integrity and electrical activity. The speed of translocation for the two species was estimated in the range of 0.45-0.58 mm/h, close to slow axonal transportation rate. Transmission electron microscopy provided direct evidence for the presence of SiO2 in the treated nerves.
Bookmarks Related papers MentionsView impact
Sae Transactions, 1999
Bookmarks Related papers MentionsView impact
A two-step thermo-chemical cycle process for solar hydrogen production from water has been develo... more A two-step thermo-chemical cycle process for solar hydrogen production from water has been developed. By using mixed iron-oxide-based redox systems at moderate temperatures the cycle offers promising properties concerning thermodynamics and efficiency and affords pure ...
Bookmarks Related papers MentionsView impact
SAE Technical Paper Series, 1988
Bookmarks Related papers MentionsView impact
International Journal of Hydrogen Energy, Apr 1, 2014
Bookmarks Related papers MentionsView impact
Sae Transactions, 2005
Bookmarks Related papers MentionsView impact
Energy & Fuels, 2016
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Chemical Engineering Science, Jul 31, 2003
Bookmarks Related papers MentionsView impact
Catalysis Today, Sep 30, 2007
Bookmarks Related papers MentionsView impact
Fuel and Energy Abstracts, 2011
Bookmarks Related papers MentionsView impact
Industrial Engineering Chemistry Research, Jun 3, 2002
Bookmarks Related papers MentionsView impact
Granul Matter, 2008
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Sae Transactions, Mar 3, 2003
... Auteur(s) / Author(s). KONSTANDOPOULOS Athanasios G. ; Résumé / Abstract. In the present work... more ... Auteur(s) / Author(s). KONSTANDOPOULOS Athanasios G. ; Résumé / Abstract. In the present work a practice for conducting experiments and analyzing the fundamental descriptors of DieselParticulate Filter (DPF) flow resistance behavior is described. ...
Bookmarks Related papers MentionsView impact
Aquatic Toxicology, 2016
Nanoparticles (NPs), due to their increased application and production, are being released into t... more Nanoparticles (NPs), due to their increased application and production, are being released into the environment with unpredictable impact on the physiology of marine organisms, as well as on entire ecosystems and upcoming effects on human health. The aim of the present study was to evaluate and compare the oxidative responses of the mussel Mytilus galloprovincialis after exposure to iron oxide NPs and to iron oxide NPs incorporated into zeolite for 1, 3 and 7 days. Our results showed that both effectors induced changes on animal physiology by causing oxidative stress in hemocytes of exposed mussels compared to control animals. This was shown by the significant increase in reactive oxygen species (ROS) production, protein carbonylation, lipid peroxidation, ubiquitin conjugates and DNA damage. In addition an increase in prooxidant levels as measured by the prooxidant-antioxidant balance (PAB) assay was observed in exposed mussels' hemolymph. The results show that ROS, DNA damage, protein and lipid oxidation, ubiquitin conjugates and PAB could constitute, after further investigation, reliable biomarkers for the evaluation of pollution or other environmental stressors. In addition, more studies are needed in order to ensure the safety of these NPs on various biomedical applications, since it is critical to design NPs that they meet the demands of application without causing cellular toxicity.
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
J Aerosol Sci, 1997
Bookmarks Related papers MentionsView impact
... 2002. [4] Z. Yue, L. Li, J. Zhou, H. Zhang and Z. Gui, Preparation and characterization of Ni... more ... 2002. [4] Z. Yue, L. Li, J. Zhou, H. Zhang and Z. Gui, Preparation and characterization of NiCuZn ferrite nanocrystalline powders by auto-combustion of nitrate-citrate gels, Materials Science and Engineering B, 64, 68-72, 1999. [5 ...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
International Journal of Nanomedicine, 2015
The axonal translocation of two commonly used nanoparticles in medicine, namely CeO2 and SiO2, is... more The axonal translocation of two commonly used nanoparticles in medicine, namely CeO2 and SiO2, is investigated. The study was conducted on frog sciatic nerve fibers in an ex vivo preparation. Nanoparticles were applied at the proximal end of the excised nerve. A nerve stimulation protocol was followed for over 35 hours. Nerve vitality curve comparison between control and exposed nerves showed that CeO2 has no neurotoxic effect at the concentrations tested. After exposure, specimens were fixed and then screen scanned every 1 mm along their length for nanoparticle presence by means of Fourier transform infrared microscopy. We demonstrated that both nanoparticles translocate within the nerve by formation of narrow bands in the Fourier transform infrared spectrum. For the CeO2, we also demonstrated that the translocation depends on both axonal integrity and electrical activity. The speed of translocation for the two species was estimated in the range of 0.45-0.58 mm/h, close to slow axonal transportation rate. Transmission electron microscopy provided direct evidence for the presence of SiO2 in the treated nerves.
Bookmarks Related papers MentionsView impact