The Experts below are selected from a list of 72 Experts worldwide ranked by ideXlab platform
Daniel De La Fuente - One of the best experts on this subject based on the ideXlab platform.
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Exploring the corrosion inhibition of aluminium by coatings formulated with calcium exchange bentonite
'Elsevier BV', 2018Co-Authors: Vega J. M., Granizo N., Simancas Peco Joaquín, Díaz Iván, Morcillo Manuel, Daniel De La FuenteAbstract:Enviromentally friendly calcium-exchange derived from naturally occurring sodium-bentonite clays (Wyoming) are shown to significantly enhance resistance to corrosion protection in organic coatings applied on aluminium under Aggressive environment typical from industrial areas. Two pigments classified as ion-exchange were also studied for comparison (Shieldex and Al-Zn-vanadate hydrotalcite) together with zinc chromate as reference corrosion protection pigment. Electrochemical impedance spectroscopy (EIS) is used to study the corrosion protection in the metal/coating interface of pigmented alkyd coatings and a blank coating (without corrosion inhibitor pigment) in combination with visual inspection. The protection performance of these specimens was studied using outdoor exposure (two atmospheres with different Aggressiveness) and accelerated tests (condensing humidity, salt spray and Kesternich tests, respectively). Results have shown strong dependence of the coating performance with the Aggressive environment (e.g. Cl, H, SO) for all coatings formulated with ion-exchange pigments. The corrosion protection of the underlying aluminium substrate provided by calcium-exchange bentonite coating was shown under the presence of cationic Aggressive Agents in accelerated corrosion tests (specifically in Kesternich test). However, poor performance was observed for this coating using chlorides as an Aggressive Agent. Therefore, the presence of bentonite pigment improves the corrosion protection due to the cation-exchange mechanism.The authors gratefully acknowledge the financial support for this work from the Ministry of Science and Innovation of Spain (CICYT-MAT 2005-06261). Authors would like to thanks to J. Guzmán of Productos Diez for coating manufacture, Tolsa SA for supplying the anticorrosive pigment and the language revision by Mrs. Mª Begoña Vega Carpintero (BSc English Philology). J.M. Vega also acknowledges the PhD scholarship financed by CSIC-MICINN.Peer Reviewe
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Exploring the corrosion inhibition of aluminium by coatings formulated with calcium exchange bentonite
Progress in Organic Coatings, 2017Co-Authors: J. M. Vega, N. Granizo, Joaquín Simancas, Iván Díaz, Manuel Morcillo, Daniel De La FuenteAbstract:Abstract Enviromentally friendly calcium-exchange derived from naturally occurring sodium-bentonite clays (Wyoming) are shown to significantly enhance resistance to corrosion protection in organic coatings applied on aluminium under Aggressive environment typical from industrial areas. Two pigments classified as ion-exchange were also studied for comparison (Shieldex ® and Al-Zn-vanadate hydrotalcite) together with zinc chromate as reference corrosion protection pigment. Electrochemical impedance spectroscopy (EIS) is used to study the corrosion protection in the metal/coating interface of pigmented alkyd coatings and a blank coating (without corrosion inhibitor pigment) in combination with visual inspection. The protection performance of these specimens was studied using outdoor exposure (two atmospheres with different Aggressiveness) and accelerated tests (condensing humidity, salt spray and Kesternich tests, respectively). Results have shown strong dependence of the coating performance with the Aggressive environment (e.g. Cl − , H + , SO 2 ) for all coatings formulated with ion-exchange pigments. The corrosion protection of the underlying aluminium substrate provided by calcium-exchange bentonite coating was shown under the presence of cationic Aggressive Agents in accelerated corrosion tests (specifically in Kesternich test). However, poor performance was observed for this coating using chlorides as an Aggressive Agent. Therefore, the presence of bentonite pigment improves the corrosion protection due to the cation-exchange mechanism.
Didier Snoeck - One of the best experts on this subject based on the ideXlab platform.
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External treatments for the preventive repair of existing constructions: A review
Construction and Building Materials, 2018Co-Authors: Mercedes Sánchez, Paulina Faria, Liberato Ferrara, Elzbieta Horszczaruk, Henk M. Jonkers, Arkadiusz Kwiecień, Jadra Mosa, Alva Peled, Alice S. Pereira, Didier SnoeckAbstract:Abstract In the present paper different external surface treatments published in the literature as preventive solutions for improving the performance of existing concrete constructions are presented and discussed. They are categorized as repair materials for concrete conservation, protection surface methods against moisture and Aggressive Agent penetration, injection techniques for crack sealing and preventive repair solutions with smart functionalities. In a final section, the most extended testing methods for evaluating the effectiveness of the different repair solutions are summarized depending on the property to be enhanced: moisture control and resistance against penetration of Aggressive Agents. The review shows that although several possibilities exist for the repair of the existing constructions, there is a lack of comparative analysis between the different methodologies. SARCOS COST Action CA15202 stablishes as scientific objectives to carry out comparative studies including the most advanced solutions for the external repair of concrete, giving criteria for effectiveness assessment and defining robust and reliable methods for charactering the performance of the repaired structures.
Klaus A Miczek - One of the best experts on this subject based on the ideXlab platform.
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zolmitriptan a 5 ht1b d agonist alcohol and aggression in mice
Psychopharmacology, 2001Co-Authors: Rosa M M De Almeida, Sara Faccidomo, Eric W Fish, Ella M Nikulina, Klaus A MiczekAbstract:Rationale: Zolmitriptan is an anti-migraine Agent with action at 5-HT1B/D receptors. It penetrates into the central nervous system and, like other 5-HT1B/D agonists, its pharmacotherapeutic profile may include significant anti-Aggressive effects. Objectives: To examine whether zolmitriptan has potential anti-Aggressive effects by studying two kinds of Aggressive behavior in mice – species-typical and aggression under the influence of alcohol. A second objective was to study whether pre- or post-synaptic receptors mediate these anti-Aggressive effects. Methods: Initially, the anti-Aggressive effects of zolmitriptan were studied in male CFW mice during 5-min resident–intruder confrontations. To confirm the 5-HT1B receptor as a critical site of action for the anti-Aggressive effects, the zolmitriptan dose–effect determinations were repeated after pretreatment with GR 127935 (10 mg/kg, i.p.). In further experiments, mice were treated concurrently with alcohol (1.0 g/kg, p.o.) and zolmitriptan (1–30 mg/kg, i.p.) in order to compare the effects of this agonist on species-typical and alcohol-heightened aggression. Finally, mice were infused with the neurotoxin 5,7-DHT (10 µg) into the raphe area to eliminate somatodendritic and presynaptic autoreceptors. The anti-Aggressive effects of zolmitriptan (17 mg/kg, i.p.) or CP-94,253 (10 mg/kg, i.p.) were assessed 10 days after the lesion, and levels of 5-HT and 5-HIAA were measured in the hippocampus and prefrontal cortex. Results: Zolmitriptan exerted behaviorally specific anti-Aggressive effects. The reduction in aggression was antagonized by GR 127935, indicated by a rightward shift in the dose–effect curves of zolmitriptan, showing the specificity for the 5-HT1B receptors. Zolmitriptan also decreased alcohol-heightened aggression with equal efficacy. The anti-Aggressive effects of CP-94,253 and zolmitriptan remained unaltered by 5,7-DHT lesions that depleted cortical and hippocampal 5-HT by 60–80%. Conclusions: Zolmitriptan proved to be an effective and behaviorally specific anti-Aggressive Agent in situations that engender moderate and alcohol-heightened levels of aggression. These effects are potentially due to activation of post-synaptic 5-HT1B/D receptors.
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Zolmitriptan : a 5-HT1B/D agonist, alcohol, and aggression in mice
Psychopharmacology, 2001Co-Authors: Rosa M M De Almeida, Sara Faccidomo, Eric W Fish, Ella M Nikulina, Klaus A MiczekAbstract:Rationale: Zolmitriptan is an anti-migraine Agent with action at 5-HT1B/D receptors. It penetrates into the central nervous system and, like other 5-HT1B/D agonists, its pharmacotherapeutic profile may include significant anti-Aggressive effects. Objectives: To examine whether zolmitriptan has potential anti-Aggressive effects by studying two kinds of Aggressive behavior in mice – species-typical and aggression under the influence of alcohol. A second objective was to study whether pre- or post-synaptic receptors mediate these anti-Aggressive effects. Methods: Initially, the anti-Aggressive effects of zolmitriptan were studied in male CFW mice during 5-min resident–intruder confrontations. To confirm the 5-HT1B receptor as a critical site of action for the anti-Aggressive effects, the zolmitriptan dose–effect determinations were repeated after pretreatment with GR 127935 (10 mg/kg, i.p.). In further experiments, mice were treated concurrently with alcohol (1.0 g/kg, p.o.) and zolmitriptan (1–30 mg/kg, i.p.) in order to compare the effects of this agonist on species-typical and alcohol-heightened aggression. Finally, mice were infused with the neurotoxin 5,7-DHT (10 µg) into the raphe area to eliminate somatodendritic and presynaptic autoreceptors. The anti-Aggressive effects of zolmitriptan (17 mg/kg, i.p.) or CP-94,253 (10 mg/kg, i.p.) were assessed 10 days after the lesion, and levels of 5-HT and 5-HIAA were measured in the hippocampus and prefrontal cortex. Results: Zolmitriptan exerted behaviorally specific anti-Aggressive effects. The reduction in aggression was antagonized by GR 127935, indicated by a rightward shift in the dose–effect curves of zolmitriptan, showing the specificity for the 5-HT1B receptors. Zolmitriptan also decreased alcohol-heightened aggression with equal efficacy. The anti-Aggressive effects of CP-94,253 and zolmitriptan remained unaltered by 5,7-DHT lesions that depleted cortical and hippocampal 5-HT by 60–80%. Conclusions: Zolmitriptan proved to be an effective and behaviorally specific anti-Aggressive Agent in situations that engender moderate and alcohol-heightened levels of aggression. These effects are potentially due to activation of post-synaptic 5-HT1B/D receptors.
Mercedes Sánchez - One of the best experts on this subject based on the ideXlab platform.
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External treatments for the preventive repair of existing constructions: A review
Construction and Building Materials, 2018Co-Authors: Mercedes Sánchez, Paulina Faria, Liberato Ferrara, Elzbieta Horszczaruk, Henk M. Jonkers, Arkadiusz Kwiecień, Jadra Mosa, Alva Peled, Alice S. Pereira, Didier SnoeckAbstract:Abstract In the present paper different external surface treatments published in the literature as preventive solutions for improving the performance of existing concrete constructions are presented and discussed. They are categorized as repair materials for concrete conservation, protection surface methods against moisture and Aggressive Agent penetration, injection techniques for crack sealing and preventive repair solutions with smart functionalities. In a final section, the most extended testing methods for evaluating the effectiveness of the different repair solutions are summarized depending on the property to be enhanced: moisture control and resistance against penetration of Aggressive Agents. The review shows that although several possibilities exist for the repair of the existing constructions, there is a lack of comparative analysis between the different methodologies. SARCOS COST Action CA15202 stablishes as scientific objectives to carry out comparative studies including the most advanced solutions for the external repair of concrete, giving criteria for effectiveness assessment and defining robust and reliable methods for charactering the performance of the repaired structures.
J. M. Vega - One of the best experts on this subject based on the ideXlab platform.
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Exploring the corrosion inhibition of aluminium by coatings formulated with calcium exchange bentonite
Progress in Organic Coatings, 2017Co-Authors: J. M. Vega, N. Granizo, Joaquín Simancas, Iván Díaz, Manuel Morcillo, Daniel De La FuenteAbstract:Abstract Enviromentally friendly calcium-exchange derived from naturally occurring sodium-bentonite clays (Wyoming) are shown to significantly enhance resistance to corrosion protection in organic coatings applied on aluminium under Aggressive environment typical from industrial areas. Two pigments classified as ion-exchange were also studied for comparison (Shieldex ® and Al-Zn-vanadate hydrotalcite) together with zinc chromate as reference corrosion protection pigment. Electrochemical impedance spectroscopy (EIS) is used to study the corrosion protection in the metal/coating interface of pigmented alkyd coatings and a blank coating (without corrosion inhibitor pigment) in combination with visual inspection. The protection performance of these specimens was studied using outdoor exposure (two atmospheres with different Aggressiveness) and accelerated tests (condensing humidity, salt spray and Kesternich tests, respectively). Results have shown strong dependence of the coating performance with the Aggressive environment (e.g. Cl − , H + , SO 2 ) for all coatings formulated with ion-exchange pigments. The corrosion protection of the underlying aluminium substrate provided by calcium-exchange bentonite coating was shown under the presence of cationic Aggressive Agents in accelerated corrosion tests (specifically in Kesternich test). However, poor performance was observed for this coating using chlorides as an Aggressive Agent. Therefore, the presence of bentonite pigment improves the corrosion protection due to the cation-exchange mechanism.
