Editorial: Impact and control of food- and waterborne protozoan parasites

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Editorial: Recent Advances in the Controversial Human Pathogens Pneumocystis, Microsporidia and Blastocystis

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Removal of Cd(II), Zn(II) and Pb(II) from aqueous solutions by brown marine macro algae: kinetic modelling

Specific marine macro algae species abundant at the Portuguese coast (Laminaria hiperborea, Bifurcaria bifurcata, Sargassum muticum and Fucus spiralis) were shown to be effective for removing toxic metals (Cd(II), Zn(II) and Pb(II)) from aqueous solutions. The initial metal concentrations in solution were about 75-100 mg L-1. The observed biosorption capacities for cadmium, zinc and lead ions were in the ranges of 23.9-39.5 mg g-1, 18.6-32.0 mg g-1 and 32.3-50.4 mg g-1, respectively. Kinetic studies revealed that the metal uptake rate was rather fast, with 75% of the total amount occurring in the first 10 min for all algal species. Experimental data were well fitted by a pseudo-second order rate equation. The contribution of internal diffusion mechanism was significant only to the initial biosorption stage. Results indicate that all the studied macro algae species can provide an efficient and cost-effective technology for eliminating heavy metals from industrial effluents

The Use of Algae and Fungi for Removal of Pharmaceuticals by Bioremediation and Biosorption Processes: A Review

The occurrence and fate of pharmaceuticals in the aquatic environment is recognized as one of the emerging issues in environmental chemistry. Conventional wastewater treatment plants (WWTPs) are not designed to remove pharmaceuticals (and their metabolites) from domestic wastewaters. The treatability of pharmaceutical compounds in WWTPs varies considerably depending on the type of compound since their biodegradability can differ significantly. As a consequence, they may reach the aquatic environment, directly or by leaching of the sludge produced by these facilities. Currently, the technologies under research for the removal of pharmaceuticals, namely membrane technologies and advanced oxidation processes, have high operation costs related to energy and chemical consumption. When chemical reactions are involved, other aspects to consider include the formation of harmful reaction by-products and the management of the toxic sludge produced. Research is needed in order to develop economic and sustainable treatment processes, such as bioremediation and biosorption. The use of low-cost materials, such as biological matrices (e.g., algae and fungi), has advantages such as low capital investment, easy operation, low operation costs, and the non-formation of degradation by-products. An extensive review of existing research on this subject is presented.This research was funded by the Associate Laboratory for Green Chemistry-LAQV which is financed by national funds from FCT/MCTES (UID/QUI/50006/2019) and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER-007265). This research was funded also by the EU and FCT/UEFISCDI/FORMAS, in the frame of the collaborative international consortium REWATER financed under the ERA-NET Cofund WaterWorks2015 Call, this ERA-NET is an integral part of the 2016 Joint Activities developed by the Water Challenges for a Changing World Joint Program Initiative (Water JPI). Andreia Silva would like to thank FCT for her Ph.D. Grant SFRH/BD/138/780/2018.info:eu-repo/semantics/publishedVersio

Nanotubos de carbono para ciclos de congelamiento y deshielo en la resistencia del concreto f’c=280kg/cm2 en la región Junín

La presente investigación, tuvo como problema general, ¿De qué manera influye el uso de Nanotubos de Carbono para ciclos de congelamiento y deshielo en la resistencia del concreto f’c=280kg/cm2 en la Región Junín en el año 2022?, tuvo como objetivo general “Evaluar de qué manera influye el uso de Nanotubos de Carbono para ciclos de congelamiento y deshielo en la resistencia del concreto f’c=280kg/cm2 en la Región Junín”, como hipótesis general “El uso de Nanotubos de Carbono influye directamente para ciclos de congelamiento y deshielo en la resistencia del concreto f’c=280kg/cm2 en la Región Junín”. El método el cual se ha realizado la investigación es el método científico, de tipo aplicada, de nivel descriptivo-Explicativo, con un diseño pre experimental, y la muestra fue realizada con especímenes de concreto convencional y concreto modificado, siendo un total de 63 probetas. En base a los resultados obtenidos del concreto patrón, y adición de NTC en 0.5% y 1.2%, se obtuvo como conclusión, que las propiedades del concreto con 0.5% de NTC siendo este el porcentaje óptimo en la mezcla

4th National Congress of Tropical Medicine and 1st Lusophone Meeting on AIDS, Tuberculosis and Opportunistic Diseases

The Institute of Hygiene and Tropical Medicine in Lisbon (IHMT) and the Association for the Development of Tropical Medicine (ADMT) organized the 4th National Congress of Tropical Medicine (CNMT) on April 19-21, 2017 in Lisbon in tandem with the 1st Lusophone Meeting on AIDS, Tuberculosis and Opportunistic Diseases, integrating the 115th anniversary of the IHMT. This biennial event brought toge-ther scientists and experts from CPLP member states, from Europe and all over the world, being the most important congress on global health and tropical medicine in Portugal. The main objective of the 2017’s edition was to establish a platform to discuss cosmopolitan themes and diseases with their own specificities in tropical countries, such as AIDS, Tuberculosis and Opportunistic Diseases, extending the interventions to the most traditional topics in tropical health like ma-laria, bilharziosis, leishmaniasis, trypanosomes, Zika virus disease and dengue, among others. This paper summarizes the main conclusions of this meeting where the state of the art was reviewed in terms of current knowledge and control strategies, covering aspects from basic research to issues related to implementation and health systems. O Instituto de Higiene e Medicina Tropical em Lisboa (IHMT) e a Associação para o Desenvolvimento da Medicina Tropical (ADMT) organizaram entre 19 e 21 de abril de 2017, em Lisboa, o 4º Congresso Nacional de Medicina Tropical (CNMT) associado ao 1º Encontro Lusófono de Sida, Tuberculose e Doenças Oportunistas, integrando as comemorações dos 115 anos do IHMT. Este evento bienal, reuniu cientistas e especialistas dos estados-membros da CPLP, da Europa e de todo o mundo, sendo o mais importante congresso sobre saúde global e medicina tropical em Portugal. O principal objetivo da edição de 2017 foi o de estabelecer uma plataforma para debater temas e doenças cosmopolitas com especificidades próprias em países tropicais, nomeadamente a Sida, a Tuberculose e as Doenças Oportunistas, alargando as intervenções ao conjunto dos temas mais tradicionais na saúde tropical como a malária, bilharziose, leishmanioses, tripanossomoses, Zica e dengue, entre outros. Neste trabalho resumem-se as principias conclusões deste encontro onde se reviu o estado da arte em termos de conhecimentos atuais e de estratégias de controlo, cobrindo aspetos desde a investigação básica às questões relacionadas com a implementação e sistemas de saúdepublishersversionpublishe