"Hiding our faces to be seen": strategies of visibility of activism

Presentación en formato pósterThis paper explores how this gesture of masking, hiding, and facial-covering is not only a liberation response to a form of oppression or a political statement against some unlawful action; but that it also works as a strategy of visibility. Following the research of Eesley, DeCelles and Lenox (2015) focusing on activist types and tactics and Bennet (2003), about global activism and networked politics, we explore the strategic communication component behind the visibility in these protests. As Ciszek states “activism is a form of strategic communication” (2017, p.702). Combining a series of quantitative and qualitative techniques for its analysis, this paper brings together recent forms of “masked activism” around the world. We elaborate a typology that helps for the understanding of the strategies and actions happening in activism and social movements with the use of masks. The question deriving from this principle would be then, to what extent those actions and strategies are ideologically grounded: can these strategies and actions differ from movements to movements? And in particular, what does the mask do, in each case? Is a mask more than a mask? Exploring these aspects should enable further research on social movements and political activism from the strategic and communicative organisation.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. Universidad de Málaga (España) - Sheffield Hallam University (Reino Unido

Takotsubo cardiomyopathy as a complication of an epileptic status

Introducción. Las complicaciones cardiológicas son la causa más frecuente de mortalidad en el estado epiléptico. La miocardiopatía de Takotsubo es una entidad descrita recientemente, que puede aparecer en numerosas emergencias médicas, entre ellas el estado epiléptico. Caso clínico. Se presenta un caso de miocardiopatía de Takotsubo en el contexto de un estado epiléptico y se revisan casos similares descritos en la literatura científica, especialmente la semiología y etiología de las crisis epilépticas, los datos epidemiológicos de los enfermos, las alteraciones en el electrocardiograma y las complicaciones ocurridas. La paciente, una mujer de 43 años, se recuperó por completo tanto cardiológica como neurológicamente, y no tuvo recurrencias en un año de seguimiento. Conclusión. La miocardiopatía de Takotsubo es una complicación grave y tratable que puede ocurrir en el estado epilépticoIntroduction. Cardiological complications are the most frequent cause of mortality in the epileptic status. Takotsubo cardiomyopathy is a recently reported condition that can appear in a number of medical emergencies, including epileptic status. Case report. We present a case of Takotsubo cardiomyopathy within the context of an epileptic status and we also review similar cases reported in the literature. Special attention is given to the semiology and aetiology of the epileptic seizures, patients’ epidemiological data, the alterations noted in the electrocardiogram and the complications that occurred. The patient, a 43-year-old female, recovered completely both cardiologically and neurologically, and did not suffer any relapses during the one-year follow-up. Conclusion. Takotsubo cardiomyopathy is a severe, treatable complication that can occur in the epileptic statu

On the relevant role of iron complexation for the performance of photo-Fenton process at mild pH: Role of ring substitution in phenolic ligand and interaction with halides

In this work, a systematic study on the effect of Fe(III) complexation by phenolic derivatives with different substitution on photo-Fenton has been carried out. Solutions containing a mixture of six pollutants (30 mg·L−1) were treated by solar simulated photo-Fenton ([Fe(II)] = 0.09 mmol·L−1, [H2O2] = 4.29 mmol·L−1, pH = 5, [Ligand] = 0.227 mmol·L−1. The efficiency of ligand increased with the presence of -OH groups (mainly in ortho- position), while the reverse was true for -COOH and -OCH3. This was correlated with the ability of the ligands to reduce Fe(III) to Fe(II). Catechol (CAT) supressed the interference of chlorides at [NaCl] = 30 mg/L−1 by complexing iron(III) thus preventing formation of FeCl2+, as 85% of Fe(III) was found as Fe(CAT)3 according to mathematical calculations. Hence, effluent matrix, including anions and organic pollutants, has a remarkable effect on iron speciation and a it should be considered when determining reaction conditions.10 página

Humic-like substances from urban waste as auxiliaries for photo-Fenton treatment: a fluorescence EEM-PARAFAC study

In this work, analysis of excitation-emission-matrices (EEM) has been employed to gain further insight into the characterization of humic like substances (HLS) obtained from urban wastes (soluble bio-organic substances, SBOs). In particular, complexation of these substances with iron and changes along a photo-Fenton process have been studied. Recorded EEMs were decomposed by using parallel factor analysis (PARAFAC). Three fluorescent components were identified by PARAFAC modeling of the entire set of SBO solutions studied. The EEM peak locations (λex/λem) of these components were 310?330 nm/400?420 nm (C1), 340?360 nm/450?500 nm (C2), and 285 nm/335?380 nm (C3). Slight variations of the maximum position of each component with the solution pH were observed. The interaction of SBO with Fe(III) was characterized by determining the stability constants of the components with Fe(III) at different pH values, which were in the order of magnitude of the ones reported for humic substances and reached their highest values at pH = 5. Photochemical experiments employing SBO and Fe(III), with and without H2O2, showed pH-dependent trends for the evolution of the modeled components, which exhibited a strong correlation with the efficiency reported for the photo-Fenton processes in the presence of SBO at different pH values.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicada

PI3K (Phosphatidylinositol 3-Kinase) activation and endothelial cell proliferation in patients with hemorrhagic hereditary telangiectasia type 1

Hemorrhagic hereditary telangiectasia (HHT) type 2 patients have increased activation of the phosphatidylinositol 3-kinase (PI3K) signaling pathway in telangiectasia. The main objective is to evaluate the activation of the PI3K pathway in cutaneous telangiectasia of HHT1 patients. A cutaneous biopsy of a digital hand telangiectasia was performed in seven HHT1 and eight HHT2 patients and compared with six controls. The study was approved by the Clinical Research Ethics Committee of our center. A histopathological pattern with more dilated and superficial vessels that pushed up the epidermis was identified in HHT patients regardless of the type of mutation and was associated with older age, as opposed to the common telangiectasia pattern. The mean proliferation index (Ki-67) was statistically higher in endothelial cells (EC) from HHT1 than in controls. The percentage of positive EC for pNDRG1, pAKT, and pS6 in HHT1 patients versus controls resulted in higher values, statistically significant for pNDRG1 and pS6. In conclusion, we detected an increase in EC proliferation linked to overactivation of the PI3K pathway in cutaneous telangiectasia biopsies from HHT1 patients. Our results suggest that PI3K inhibitors could be used as novel therapeutic agents for HHT

Bio-based substances from urban waste as auxiliaries for solar photo-Fenton treatment under mild conditions: optimization of operational variables

The use of soluble bio-based organic substances (SBO) obtained from urban wastes to expand the pH region where the photo-Fenton process can be applied has been investigated in this study. For this purpose, a mixture of six pollutants, namely acetaminophen, carbamazepine, amoxicillin, acetamiprid, clofibric acid and caffeine, at an initial concentration of 5 mg L−1 each, has been employed. Surface response methodology, based on the Doehlert matrix, has shown to be a useful tool to determine the effect of pH (in the range 3–7), concentration of SBO (15–25 mg L−1) and iron (2–6 mg L−1) on the performance of the photodegradation of the studied pollutants, measured by their half-life. Results indicate that, at high SBO concentration, the optimum pH shifts in most cases to a higher value (between 3 and 4) and that a significant loss of efficiency of the process was only observed at pH values above 5. An iron concentration of 4–5 mg L−1 and an amount of SBO of 19–22 mg L−1 have been determined to be the optimal conditions for the degradation of most of the studied pollutants at pH = 5.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicada

VARIACIÓN TEMPORAL DE LA ABUNDANCIA EN FAMILIAS DE MOSCAS CARROÑERAS (DIPTERA, CALYPTRATAE) EN UN VALLE ANDINO ANTROPIZADO DE COLOMBIA

In temperate studies on carrion flies assemblages is widely accepted that Calliphoridae followed by Sarcophagidae, Muscidae and Fanniidae are the most abundant families in terms of abundance. In the Neotropical region, consideration on this matter had been little studied. During a one-year survey, the abundance variation of these families assemblage of carrion flies in an anthropized Andean valley located in the province of Antioquia, was studied. From February 2010 to February 2011 two monthly sampling per site were performed, Van Someren Rydon traps baited with fish and chicken were settled in four localities, one per cardinal point with different landscape use. A total number of 33838 flies were collected distributed as follow: Calliphoridae (39%), Sarcophagidae (23%), Fanniidae (18%), Muscidae (16%), and small fraction of other dipteran families (4%). This trend in the families abundance was observed during the complete year except in May, March and August when sarcophagids were the most abundant. It is remarkable the alternate half-year abundance of Muscidae and Fannidae. No significance differences in flies’ abundance were observed according the climatic season, and sampling locality. Differences in flies abundance were found by month sampled where an increase pattern in the last months were evident. Differences also were found in family rank assessed, being Calliphoridae the most frequent. Accumulate number of Sarcophagidae contrast with others studies in tropical ecosystem where the second more frequent family is Muscidae probably due to the type and decomposition stage of the bait.Estudios sobre el ensamblaje de moscas descomponedoras en regiones templadas, registran a las familias Calliphoridae, Sarcophagidae, Muscidae y Fanniidae como las más importantes de acuerdo con su abundancia. Se estudia la variación mensual de la abundancia de las familias mencionadas en el ensamblaje de moscas carroñeras del Valle del Aburrá, departamento de Antioquia. Se realizaron dos muestreos mensuales durante un año, utilizando trampas Van Someren-Rydon cebadas con vísceras de pollo y cabeza de pescado en los 4 puntos cardinales y cada uno con diferente vocación de uso. Se encontró un total de 33834 moscas, Calliphoridae (39%), Sarcophagidae (23%), Fanniidae (18%), Muscidae (16%), otras familias (4%). La tendencia de sus frecuencias se mantuvo a través del año excepto en marzo, mayo y agosto donde la familia más abundante fue Sarcophagidae; se destaca la alternancia semestral de la abundancia de Muscidae y Fanniidae durante el año. No se evidencian diferencias significativas de abundancia entre época climática, ni entre las localidades de muestreo y sí por mes de muestreo en donde se evidencia un comportamiento creciente, se encontraron diferencias significativas según la familia siendo Calliphoridae la más frecuente. La proporción acumulada de la familia Sarcophagidae durante el año contrasta con los resultados de otros estudios en ambientes tropicales donde la familia Muscidae es la segunda más frecuente; esta variación podría deberse al tipo diferente de cebo utilizado y a su estado de descomposición

Humic-like substances from urban waste as auxiliaries for photo-Fenton treatment: a fluorescence EEM-PARAFAC study

[EN] In this work, analysis of excitation-emission-matrices (EEM) has been employed to gain further insight into the characterization of humic like substances (HLS) obtained from urban wastes (soluble bio-organic substances, SBOs). In particular, complexation of these substances with iron and changes along a photo-Fenton process have been studied. Recorded EEMs were decomposed by using parallel factor analysis (PARAFAC). Three fluorescent components were identified by PARAFAC modeling of the entire set of SBO solutions studied. The EEM peak locations (lambda(ex)/lambda(em)) of these components were 310-330 nm/400-420 nm (C1), 340-360 nm/450-500 nm (C2), and 285 nm/335-380 nm (C3). Slight variations of the maximum position of each component with the solution pH were observed. The interaction of SBO with Fe(III) was characterized by determining the stability constants of the components with Fe(III) at different pH values, which were in the order of magnitude of the ones reported for humic substances and reached their highest values at pH = 5. Photochemical experiments employing SBO and Fe(III), with and without H2O2, showed pH-dependent trends for the evolution of the modeled components, which exhibited a strong correlation with the efficiency reported for the photo-Fenton processes in the presence of SBO at different pH values.This work was supported by Generalitat Valenciana, Conselleria d'Ecuacio, Cultura i esport, Spain (GV/2015/074), Spanish Ministerio de Economia y Competitividad (CTQ2015-69832-C4-4-R) and by the Marie Sklodowska-Curie Research and Innovation Staff Exchange project funded by the European Commission H2020-MSCA-RISE-2014 (Project number: 645551). F. S. G. E. and L. C. are researchers from CONICET, Argentina.García-Ballesteros, S.; Constante, M.; Vicente Candela, R.; Mora Carbonell, M.; Amat Payá, AM.; Arques Sanz, A.; Carlos, L.... (2017). Humic-like substances from urban waste as auxiliaries for photo-Fenton treatment: a fluorescence EEM-PARAFAC study. Photochemical & Photobiological Sciences. 16:38-45. https://doi.org/10.1039/c6pp00236fS384516Malato, S., Fernández-Ibáñez, P., Maldonado, M. I., Blanco, J., & Gernjak, W. (2009). Decontamination and disinfection of water by solar photocatalysis: Recent overview and trends. Catalysis Today, 147(1), 1-59. doi:10.1016/j.cattod.2009.06.018WANG, J. L., & XU, L. J. (2012). Advanced Oxidation Processes for Wastewater Treatment: Formation of Hydroxyl Radical and Application. Critical Reviews in Environmental Science and Technology, 42(3), 251-325. doi:10.1080/10643389.2010.507698Pignatello, J. J., Oliveros, E., & MacKay, A. (2006). Advanced Oxidation Processes for Organic Contaminant Destruction Based on the Fenton Reaction and Related Chemistry. Critical Reviews in Environmental Science and Technology, 36(1), 1-84. doi:10.1080/10643380500326564Papoutsakis, S., Miralles-Cuevas, S., Oller, I., Garcia Sanchez, J. L., Pulgarin, C., & Malato, S. (2015). Microcontaminant degradation in municipal wastewater treatment plant secondary effluent by EDDS assisted photo-Fenton at near-neutral pH: An experimental design approach. Catalysis Today, 252, 61-69. doi:10.1016/j.cattod.2015.02.005Klamerth, N., Malato, S., Agüera, A., & Fernández-Alba, A. (2013). Photo-Fenton and modified photo-Fenton at neutral pH for the treatment of emerging contaminants in wastewater treatment plant effluents: A comparison. Water Research, 47(2), 833-840. doi:10.1016/j.watres.2012.11.008De Luca, A., Dantas, R. F., & Esplugas, S. (2015). Study of Fe(III)-NTA chelates stability for applicability in photo-Fenton at neutral pH. Applied Catalysis B: Environmental, 179, 372-379. doi:10.1016/j.apcatb.2015.05.025Bernabeu, A., Palacios, S., Vicente, R., Vercher, R. F., Malato, S., Arques, A., & Amat, A. M. (2012). Solar photo-Fenton at mild conditions to treat a mixture of six emerging pollutants. Chemical Engineering Journal, 198-199, 65-72. doi:10.1016/j.cej.2012.05.056Klamerth, N., Malato, S., Maldonado, M. I., Agüera, A., & Fernández-Alba, A. (2011). Modified photo-Fenton for degradation of emerging contaminants in municipal wastewater effluents. Catalysis Today, 161(1), 241-246. doi:10.1016/j.cattod.2010.10.074Voelker, B. M., Morel, F. M. M., & Sulzberger, B. (1997). Iron Redox Cycling in Surface Waters:  Effects of Humic Substances and Light. Environmental Science & Technology, 31(4), 1004-1011. doi:10.1021/es9604018De la Cruz, N., Giménez, J., Esplugas, S., Grandjean, D., de Alencastro, L. F., & Pulgarín, C. (2012). Degradation of 32 emergent contaminants by UV and neutral photo-fenton in domestic wastewater effluent previously treated by activated sludge. Water Research, 46(6), 1947-1957. doi:10.1016/j.watres.2012.01.014Gomis, J., Vercher, R. F., Amat, A. M., Mártire, D. O., González, M. C., Bianco Prevot, A., … Carlos, L. (2013). Application of soluble bio-organic substances (SBO) as photocatalysts for wastewater treatment: Sensitizing effect and photo-Fenton-like process. Catalysis Today, 209, 176-180. doi:10.1016/j.cattod.2012.08.036Gomis, J., Carlos, L., Prevot, A. B., Teixeira, A. C. S. C., Mora, M., Amat, A. M., … Arques, A. (2015). Bio-based substances from urban waste as auxiliaries for solar photo-Fenton treatment under mild conditions: Optimization of operational variables. Catalysis Today, 240, 39-45. doi:10.1016/j.cattod.2014.03.034Gomis, J., Bianco Prevot, A., Montoneri, E., González, M. C., Amat, A. M., Mártire, D. O., … Carlos, L. (2014). 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Fluorescence Inner-Filtering Correction for Determining the Humification Index of Dissolved Organic Matter. Environmental Science & Technology, 36(4), 742-746. doi:10.1021/es0155276Bahram, M., Bro, R., Stedmon, C., & Afkhami, A. (2006). Handling of Rayleigh and Raman scatter for PARAFAC modeling of fluorescence data using interpolation. Journal of Chemometrics, 20(3-4), 99-105. doi:10.1002/cem.978Ryan, D. K., & Weber, J. H. (1982). Fluorescence quenching titration for determination of complexing capacities and stability constants of fulvic acid. Analytical Chemistry, 54(6), 986-990. doi:10.1021/ac00243a033Yan, M., Fu, Q., Li, D., Gao, G., & Wang, D. (2013). Study of the pH influence on the optical properties of dissolved organic matter using fluorescence excitation–emission matrix and parallel factor analysis. Journal of Luminescence, 142, 103-109. doi:10.1016/j.jlumin.2013.02.052Dryer, D. J., Korshin, G. V., & Fabbricino, M. (2008). 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Gaining further insight into photo-Fenton treatment of phenolic compounds commonly found in food processing industry

A mixture of eight phenolic compounds, namely 2,4-dinitrophenol, tannic, ellagic, gallic, protocatechuic, vanillic, syringic and sinapic acids, have been treated by means of a photo-Fenton process under simulated and real sunlight. An experimental design methodology, based in Doehlert matrixes, was employed to check the effect of the concentration of Fe(II) and H2O2, as well as pH. Response surfaces show that photo-Fenton can be extended to pH values clearly above 2.8, probably due to complexation of iron with the phenolic substances. Experiments performed under solar irradiation at pH = 3.9 showed that complete removal of the monitored pollutants was achieved in less than 3 min; mineralisation was also efficient, although some organics remained in the solution. Toxicity was monitored according to Pseudokirchneriella subcapitata and Daphnia magna bioassays; Recombinant Yeast Assay (RYA) was employed to assess estrogenic and dioxin-like activities. 2,4-Dinitrophenol was demonstrated to be the major concern and, in general, photo-Fenton resulted in a detoxification of the solution. Finally, excitation emission matrix (EEM) fluorimetry was employed to obtain complementary information on the behaviour of organic matter. Most peaks associated with the parent pollutants disappeared after short irradiation periods and, at 12 min of irradiation chromophores were destroyed, what can be associated with the removal of complex molecules. (C) 2015 Elsevier B.V. All rights reserved.The authors want to thank the financial support of the Spanish Ministerio de Education y Ciencia (CTQ2012-38754-C03-02) and Generalitat Valenciana (GV/2015/074). Sara Garcia-Ballesteros would like to thank Spanish Ministerio de Economia y Competitividad for her fellowship (BES-2013-066201).García Ballesteros, S.; Mora Carbonell, M.; Vicente Candela, R.; Sabater Marco, C.; Castillo López, MÁ.; Arques Sanz, A.; Amat Payá, AM. (2016). Gaining further insight into photo-Fenton treatment of phenolic compounds commonly found in food processing industry. Chemical Engineering Journal. 288:126-136. https://doi.org/10.1016/j.cej.2015.11.031S12613628