Guía de especies vegetales de la cuenca mediterránea aptas para revegetación: Adecuación para zonas degradadas y contaminadas

La guía contiene información de especies de plantas de la cuenca mediterránea, adecuadas para utilizar en revegetación de zonas degradadas y/o contaminadas con presencia de metales pesados, siguiendo diferentes criterios medioambientales y paisajísticos y estableciendo recomendaciones o restricciones para su implantación y crecimiento, sin necesidad de recurrir a la utilización de especies exóticas con potencial invasor. Para cada especie se proporciona información abreviada de las principales características que las hacen aptas para su uso en los diferentes entornos. Finalmente se establecen cinco modelos de asociaciones paisajísticas para usar en diferentes zonas y con diferentes condiciones medioambientales

Distopías poéticas de la sobremodernidad: Stanislaw Lem y su propuesta en fábulas de robots

Resumen La finalidad de este artículo, es precisar qué es una distopía poética bajo el enfoque literario de Stanislaw Lem, como aporte fundamental para la actual literatura de ciencia ficción. Para ello, se examinan las características propias de la distopía en la historicidad del género y su relación con el concepto de sobremodernidad, desarrollado teóricamente por la antropología social contemporánea. Para tal ejercicio, es fundamental abordar el contexto social y cultural de la producción literaria de este autor, en particular con: Fábulas de Robots, que expresa la crisis de sentido del hombre actual, la manera en que esta obra es creada y al mismo tiempo recepcionada, para argumentar que la literatura de ciencia ficción es, por excelencia, la literatura de la sobremodernidad. Se plantea, como ejercicio interdisciplinar, las reflexiones y aportes en la construcción de una poética ficcional, desde el enfoque sociológico, antropológico y fenomenológico. Palabras clave: Distopía poética, sobremodernidad, ciencia ficción, crisis de sentido y antropología social. **************************************************************************************** Poetic dystopias of overmodernity: Stanislaw Lem and his proposal in robot fables Abstract The purpose of this article is to clarify what is a poetic dystopia under the literary approach of Stanislaw Lem, as a fundamental contribution to current science fiction literature. To this end, the characteristics of dystopia in the historicity of the genre and its relationship with the concept of overmodernity, theoretically developed by contemporary social anthropology, are examined. For such an exercise, it is fundamental to approach the social and cultural context of the literary production of this author, in particular with: Fábulas de Robots, which expresses the crisis of meaning of the present man, the way in which this work is created and at the same time received, to argue that science fiction literature is, par excellence, the literature of overmodernity. As an interdisciplinary exercise, the reflections and contributions in the construction of a fictional poetics, from the sociological, anthropological and phenomenological point of view, are proposed. Key Words: Poetic dystopia, overmodernity, science fiction, crisis of meaning and social anthropology. **************************************************************************************** Distopias poéticas da sobremodernidade: Stanislaw Lem e sua proposta em fábulas de robôs Resumo O objetivo deste artigo é esclarecer o que é uma distopia poética na abordagem literária de Stanislaw Lem, como contribuição fundamental para a literatura atual de ficção científica. Para tanto, são examinadas as características da distopia na historicidade do gênero e sua relação com o conceito de sobremodernidade, teoricamente desenvolvido pela antropologia social contemporânea. Para tal exercício, é fundamental abordar o contexto social e cultural da produção literária deste autor, em particular com: Fábulas de Robots, que expressa a crise de sentido do homem atual, a forma como esta obra é criada e ao mesmo tempo recebida, para argumentar que a literatura de ficção científica é, por excelência, a literatura da sobremodernidade. Como exercício interdisciplinar, são propostas as reflexões e contribuições na construção de uma poética ficcional, do ponto de vista sociológico, antropológico e fenomenoló. Palavras chave: Distopia poética, sobremodernidade, ficção científica, crise de significado e antropologia social

EL PROCESO DE FORMACIÓN SOCIO COMUNITARIA EN UNIVERSIDADES VENEZOLANAS: UNA PERSPECTIVA PARA SU PERFECCIONAMIENTO

The research responds to the need for a new vision of curriculum management in the process of socio community formation of the university students, with the aim of contributing to overcome shortcomings in the community service they perform in Venezuela, which limits their training as a mutual transformational process to social development. This research, promotes and develops the critical and constructive reflection on concepts, principles and mechanisms that characterize the process of socio community training as a perspective that can undertake the development of community service of Venezuelan higher education students, once established by the "law of community service for the students of higher education" (2005) finally revealing the challenges that it poses to the guidance and management of the curriculum in the training of professionals of all races. Address the various elements which serve as basis for the process of socio-community training of the University student, with emphasis on its epistemological aspects that serve as support to the main results of the research. The study has allowed revealing the need for curriculum management supported from the epistemological and axiological essence of University social responsibility for the process of training partner community of the College student in relation to the diversity of the professional context. The current inconsistencies do not ensure a sufficient level of systematization in the process of socio community formation and curricular management from the relationship: University - University social responsibility - community and their integration with the University management.La investigación responde a la necesidad de una nueva visión de la gestión curricular en el proceso de formación socio comunitario de los estudiantes universitarios, con el objetivo de contribuir a superar las insuficiencias en el servicio comunitario que limita la formación profesional como proceso transformador recíproco al desarrollo social en Venezuela. En esta investigación se promueve y se desarrolla la reflexión crítica y constructiva de los conceptos, principios y mecanismos que caracterizan el proceso de formación socio comunitario, como una perspectiva que permite acometer el perfeccionamiento del servicio comunitario de los estudiantes de la Educación Superior venezolana, una vez establecido éste por la “Ley de Servicio Comunitario para los Estudiantes de Educación Superior” (2005), para revelar los desafíos que ella plantea a la orientación y gestión del currículo en la formación de profesionales de todas las carreras. Se abordan los diferentes elementos que sirven de base al proceso de formación socio comunitaria del estudiante universitario, con énfasis en sus aspectos epistemológicos que sustentan a los principales resultados de la investigación. El estudio revela la necesidad de una gestión curricular sustentada desde la esencia epistemológica y axiológica de la responsabilidad social universitaria para el proceso de formación socio comunitario del estudiante universitario en su relación con la diversidad del contexto profesional. Las actuales inconsistencias limitan el nivel de sistematización en el proceso de formación socio comunitario y su gestión curricular desde la relación universidad – responsabilidad social universitaria – comunidad y su integración con la gestión universitaria institucional

Modeling and experimental analysis of CO2 methanation reaction using Ni/CeO2 monolithic catalyst

In this study, the effect of the cell density of monolithic catalysts was investigated and further mathematically modeled on cordierite supports used in CO2 methanation. Commercial cordierite monoliths with 200, 400, and 500 cpsi cell densities were coated by immersion into an ethanolic suspension of Ni/CeO2 active phase. SEM–EDS analysis confirmed that, owing to the low porosity of cordierite (surface area < 1 m2 g−1), the Ni/CeO2 diffusion into the walls was limited, especially in the case of low and intermediate cell density monoliths; thus, active phase was predominantly loaded onto the channels’ external surface. Nevertheless, despite the larger exposed surface area in the monolith with high cell density, which would allow for better distribution and accessibility of Ni/CeO2, its higher macro-pore volume resulted in some introduction of the active phase into the walls. As a result, the catalytic evaluation showed that it was more influenced by increments in volumetric flow rates. The low cell density monolith displayed diffusional control at flow rates below 500 mL min−1. In contrast, intermediate and high cell density monoliths presented this behavior up to 300 mL min−1. These findings suggest that the interaction reactants-catalyst is considerably more affected by a forced non-uniform flow when increasing the injection rate. This condition reduced the transport of reactants and products within the catalyst channels and, in turn, increased the minimum temperature required for the reaction. Moreover, a slight diminution of selectivity to CH4 was observed and ascribed to the possible formation of hot spots that activate the reverse water–gas shift reaction. Finally, a mathematical model based on fundamental momentum and mass transfer equations coupled with the kinetics of CO2 methanation was successfully derived and solved to analyze the fluid dynamics of the monolithic support. The results showed a radial profile with maximum fluid velocity located at the center of the channel. A reactive zone close to the inlet was obtained, and maximum methane production (4.5 mol m−3) throughout the monolith was attained at 350 °C. Then, linear streamlines of the chemical species were developed along the channel.Funding for open access publishing: Universidad de Granada/CBUA. This work was supported by the Spanish project PID2021-127803OB-I00 funded by MCIN/AEI/ https://doi.org/10.13039/501100011033/ and by “ERDF A way of making Europe.” A. Parra-Marfil has received research support from CONACYT through the PhD grant 818974, E. Bailón-García is grateful to MICINN for her postdoctoral fellowship (RYC2020-029301-I), and A. Bueno-López thanks the financial support of Generalitat Valenciana (Projects CIPROM/2021/74 and MFA/2022/036) and the EU Next Generation funding

Auto-Pressurized Multi-Stage Tesla-Valve Type Microreactors in Carbon Monoliths Obtained Through 3D Printing: Impact of Design on Fluid Dynamics and Catalytic Activity

The present research exploits an innovative methodology for producing auto-pressurized carbon microreactors with a precise and controlled structure analyzing the influence of their design on the fluid dynamics and their catalytic performance. Carbon monoliths with Tesla-valve shape channels (Tesla, T, and modified Tesla, Tm) are synthesized through the combination of 3D printing and sol–gel process and further probed as Ni/CeO2 supports on CO2 methanation. The experimental results and mathematical modeling corroborated the improved performance obtained through the complex design compared to a conventional one. In addition to chaotic fluid flow induced by the deviation in flow direction, which improves the reagents-active phase interaction, local pressure increases due to convergence of flows may enhance the Sabatier reaction according to Le Châtelier's principle. Conversely to straight channels, T and Tm are not affected by flow rate and presented chemical control. Tesla-valve with curved angle (Tm) improved the mass transfer, achieving higher conversion and ≈30% reaction rate increase regarding right angle (T). Thus, this auto-pressurized multi-stage Tesla-valve monolith opens the gate to design specific and advanced functional materials for multitude chemical reactions where not only the reactant-active phase contact can be maximized but also the reaction conditions can be controlled to maximize the reaction kinetics.This research had been supported by the Spanish project PID2021-127803OB-I00 funded by MCIN/AEI/ 10.13039/501100011033/ and by “ERDF A way of making Europe”. Authors also thanks the “Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente” of the University of Granada (UEQ – UGR) for its technical assistance. A. Parra-Marfil appreciates the financial support provided by CONAHCYT through the PhD grant 818974. E. Bailón-García was grateful to MICINN for her postdoctoral fellowship (RYC2020-029301-I). A. Bueno López thanks the financial support of Generalitat Valenciana (Project CIPROM/2021/74)

An ancient testis-specific IQ motif-containing H gene regulates specific transcript isoform expression during spermatogenesis

Spermatogenic cells express more alternatively spliced RNAs than most whole tissues; however, the regulation of these events remains unclear. Here, we have characterized the function of a testis-specific IQ motif-containing H gene (Iqch) using a mutant mouse model. We found that Iqch is essential for the specific expression of RNA isoforms during spermatogenesis. Using immunohistochemistry of the testis, we noted that Iqch was expressed mainly in the nucleus of spermatocyte and spermatid, where IQCH appeared juxtaposed with SRRM2 and ERSP1 in the nuclear speckles, suggesting that interactions among these proteins regulate alternative splicing (AS). Using RNA-seq, we found that mutant Iqch produces alterations in gene expression, including the clear downregulation of testis-specific lncRNAs and protein-coding genes at the spermatid stage, and AS modifications – principally increased intron retention – resulting in complete male infertility. Interestingly, we identified previously unreported spliced transcripts in the wild-type testis, while mutant Iqch modified the expression and use of hundreds of RNA isoforms, favouring the expression of the canonical form. This suggests that Iqch is part of a splicing control mechanism, which is essential in germ cell biologyThis study was funded by the Ministerio de Ciencia e Innovación/Agencia Estatal de Investigación (PID2021-122507OB-I00 and PID2020-117491GB-I00) and the European Union NextGenerationEU/PRTR. P.N.-L. was supported by a pre-doctoral fellowship from the Ministerio de Ciencia e Innovación (PRE2019-088813) and M.L. was supported by a Juan de la Cierva postdoctoral contract (FJC2019-040385-I) from the Ministerio de Ciencia e Innovación. Open access funding provided by Consejo Superior de Investigaciones Cientıficas. Deposited in PMC for immediate releas

Knowledge on Signs and Risk Factors in Stroke Patients

Background: There is a pressing need to contribute evidence to the improvement in the early identification of signs and symptoms associated with strokes, and address the treatment-seeking delays. The objective of this study is to describe the knowledge regarding the warning signs and risk factors (RFs) among stroke patients, as well as of their attitudes toward a suspected event, and the analysis of its possible relationship with the socio-demographic and clinical characteristics of these patients. Method: A cross-sectional study was designed, in which all stroke patients admitted consecutively to the Burgos University Hospital (Spain) were included. The principal outcomes were the patient’s ability to identify two RFs and two warning signs and the patient’s hypothetical response to a possible stroke event. The possible factors associated with the knowledge of warning signs, RFs, and the correct response to a new event were studied using univariate and multivariate regression analysis. Results: A total of 529 patients were included. Having a higher education level or a history of prior stroke were associated with a greater degree of knowledge of warning signs (odds ratio (OR) 3.19, 95% confidence interval (CI) 1.70–5.74, p = 0.003; OR 3.54, 95%CI 2.09–5.99, p ≤ 0.001, respectively), RFs (OR 3.15, 95%CI 1.75–5.67, p = 0.008; OR 4.08, 95%CI 2.41–6.91, p = 0.002, respectively), and the correct response to a possible stroke (OR 1.82, 95%CI 1.16–2.86; p = 0.030; OR 2.11, 95%CI 1.29–3.46, p = 0.022, respectively). Conclusion: Knowledge of warning signs or stroke RFs is low in the hospitalized patients. A previous stroke or secondary/higher education levels are the predictor factors that increase the probability of knowledge of warning signs, RFs, or reaction to possible event

Age-Related Risk Factors at the First Stroke Event

(1) Background: Stroke is a multifactorial disease, which can affect individuals at any age. Risk factors (RFs) associated with the first stroke event have been well identified; however, the influence of these RFs on the patient’s age needs to be studied. (2) Objective: This study aimed to examine the effect of modifiable RFs on the age at which a stroke occurs. (3) Methods: A cross-sectional study was conducted on patients admitted consecutively with a first-ever acute stroke at the Burgos University Hospital (Spain). Data on sociodemographic and clinical parameters were collected (high blood pressure (HBP), smoking habit, diabetes mellitus (DM), dyslipemia, abdominal obesity, sedentary lifestyle, alcohol consumption, and cardiovascular diseases). The possible associations between RFs and age were studied using univariate and multivariate regression analyses and a decision tree. (4) Results: A total of 436 patients with a mean age of 75.39 years (standard deviation (SD) ± 12.67) were included. HBP and overweight/obesity were the most prevalent stroke RFs. Being an active smoker (OR 21.48; 95% confidence interval (CI) 8.80–52.41), having a sedentary lifestyle (OR 3.24; 95% CI 1.97–5.31), being an excessive alcohol drinker (OR 2.36; 95% CI 1.45–3.84), or being overweight or obese (OR 1.95; 95% CI 1.14–3.34) increased the risk of having an acute cerebrovascular event in individuals aged 75 years or below. However, a personal history of HBP (OR 0.40; 95% CI 0.24–0.67) was significantly associated with a greater likelihood of having an acute stroke in individuals aged more than 75 years. (5) Conclusions: This study showed that the modifiable RFs strongly influence the first stroke event in patients aged below 75 years, which will be useful in guiding different prevention strategies

Effects of Supplementation with Microminerals on Production Indicators and Blood, Feces, and Urine Traces of Grazing Alpaca (Lama lama)

To analyze the effect of additional microminerals in the diet supplement on weight and diameter of alpaca fiber, the application of three doses of selenium and zinc (0.0; 1.0; and 1.5 cc) on the diet, on CRD factorial arrangement (3 x 2) + (3 x 2), was assessed. The results showed statistically significant differencences for treatments: selenium doses, ages, zinc doses, and for zinc interaction by ages (Se1E2 with 74.33 kg at 90 days, for height at the withers, Zn1E2, averaging 91.33 cm). Fiber length for treatments Se1E1 and Se1E2 averaged 3 cm. For fiber diameter, treatments 1 (Se0E1) and Se1E1, group 1, and treatments Zn0E2 and Zn1E1, group 2, showed the best fiber quality (P &lt; 0.05), averaging 28 microns. Live weight and fiber quality from mature animals based on supplementation with Se and Zn had beneficial effects, which improved phenotypical features of production, like live weight, though residues were found in 3-5 year old animals