Optimization of electrophoretic deposition technique to control doping and densification of protective spinel coatings for SOC interconnects

Manganese cobaltite spinel coatings have been reported to limit oxidation and Cr-evaporation from ferritic stainless steel interconnects in solid oxide cell stacks; however, the implementation of the functional properties of the base Mn–Co spinel coating and compatibility with the substrate can be pursued through the optimisation of the coating composition, as well as the deposition method and sintering profile. Electrophoretic deposition (EPD) allows to deposit homogeneous layers in few seconds on complexly shaped steel components; it also offers the possibility to produce in-situ doped coatings, avoiding time and energy consuming multi-step processes. In this work, various EPD suspensions are optimised to achieve a single step co-deposition of CuO, Fe2O3 and Mn1,5Co1,5O4 on Crofer 22 APU. Different Fe-Cu doped Mn–Co spinel are successfully obtained by controlling the precursors amount in the EPD suspension and subsequent reactive sintering, as proved by detailed SEM and TEM analyses. Improved functional properties of produced coatings are evaluated in terms of oxidation kinetics and area specific resistance. Both the iron and copper amount in the coating and the sintering process significantly influence the coating densification, with benefits to the protective properties and thermomechanical compatibility with the interconnect

Uro-oncology in the era of social distancing : the principles of patient-centered online consultations during the COVID-19 pandemic

The COVID-19 pandemic poses significant challenges to healthcare facilities and as per social distancing measures, many consultations are now being carried out via means of telemedicine. As some urologists may not be skilled with remote consultations, there is a need for recommendations on patient-centered online medical counseling. We have identified eight areas of excellence and defined the principles based on our experience. A professional setting should be provided, in which the privacy of the patient can be ensured. Accompanying persons should be encouraged into the consultation. Proper introduction could serve not only to verify the personality of the patient, but also to provide them with a sense of confidentiality. The interview should be held in a way to overcome the limitations of non-physical encounters, and pande-mic-specific issues should be taken into consideration. When arranging plans, the physician should judge accordingly in regards to what type of management is inevitable or safe, as well as available at this point; strict follow-up should be arranged. As home isolation may lead to unfavorable changes in lifestyle, this issue should be addressed too. The patient should be guided on how to self-educate. Concluding the visit should be aimed at proper evaluation of the patient's comprehension of the consultation. It is vital to pursue consistency in providing care to patients. While online counseling may seem challenging, if one adheres to the principles of patient-centered practice, telemedicine may become a valuable tool in maintaining the best-quality care amid the ongoing pandemic

Neurobehavioral evaluation and phytochemical characterization of a series of argentine valerian species

Folkloric or galenic preparations of valerian roots and rhizomes have been used as sedatives/anxiolytics and sleep inducers since ancient times. “Valerianas” are plants that naturally grow in our region. Although some of them are used in folk medicine, they lack scientific information. We performed a comparative study of the phytochemical composition and the potential in vivo effects of ethanolic extracts of argentine valerian species: Valeriana carnosa Sm., V. clarionifolia Phil. and V. macrorhiza Poepp. ex DC., from “Patagonia Argentina”; V. ferax (Griseb.) Höck and V. effusa Griseb., from the central part of our country, and V. officinalis (as the reference plant). All these plants were rich in phenolic compounds, evidenced the presence of ligands for the benzodiazepine binding site of the GABAA receptor and were able to induce sedation as assessed by loss-of-righting reflex assays (500 mg/kg, i.p.). Mice treated with V. macrorhiza, V. carnosa and V. ferax extracts showed reduced exploratory behaviors while V. clarionifolia produced anxiolytic-like activities (500 mg/kg, i.p.) in the Hole board test. Oral administrations (300 mg/kg and 600 mg/kg, p.o.) evidenced sedative effects for V. ferax and anxiolytic-like properties for V. macrorhiza, V. carnosa and V. clarionifolia extracts. Our native valerian species are active on the CNS, validating its folkloric use as anxiolytic/sedative and sleep enhancers.Instituto de Recursos BiológicosFil: Marcucci, Carolina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini; ArgentinaFil: Anselmi Relats, Juan Manuel. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini; ArgentinaFil: Bach, Hernán Gerónimo. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Recursos Biológicos; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Cátedra de Farmacobotánica; ArgentinaFil: Kamecki, Fabiola. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini; ArgentinaFil: Varela, Beatriz G. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Cátedra de Farmacobotánica; ArgentinaFil: Wagner, Marcelo L. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Cátedra de Farmacobotánica; ArgentinaFil: Pastore, Valentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini; ArgentinaFil: Pastore, Valentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Estudios Inmunológicos y Fisiopatológicos. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Estudios Inmunológicos y Fisiopatológicos; ArgentinaFil: Colettis, Natalia. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini; ArgentinaFil: Ricco, Rafael A. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Cátedra de Farmacobotánica; ArgentinaFil: Marder, Mariel. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Química y Fisicoquímica Biológicas Prof. Dr. Alejandro C. Paladini; Argentin

Experimental review of the performances of protective coatings for interconnects in solid oxide fuel cells

Ferritic stainless steel interconnects are used in solid oxide fuel cells; however, coatings are required to improve their performance. Although several types of coatings have been proposed, they have been scarcely investigated under similar conditions. This study compares the characteristics of uncoated Crofer 22 APU and eight different coatings on Crofer 22 APU for up to 3000\ua0h at 800\ua0\ub0C. The coatings were deposited at various research laboratories around the world, and the experiments were performed at Chalmers University of Technology, Sweden. Cross-sections of the samples were analysed using scanning electron microscopy and energy-dispersive x-ray spectroscopy. The (Co,Mn)-based coated steels showed more than 50-fold lower chromium evaporation and at least 3 times thinner Cr2O3 scale thickness compared to uncoated steel. The coated steel samples showed lower area-specific resistance (ASR) values than the uncoated steel after 3000\ua0h of exposure, irrespective of the coating thickness, composition and deposition method

L'avenir du Comecon

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La coopération économique au sein du Conseil d'Assistance Economique Mutuelle (CAEM) et entre ses membres

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