Utopía y praxis revolucionaria : las alternativas de José Martí para América Latina

Fil: Morales, Salvador E.

La emigración cubana

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High and intermediate sulphidation environment in the same hydrothermal deposit: the example of Au-Cu Palai–Islica deposit, Carboneras (Almería)

Two epithermal environments have been identified in the Miocene Palai–Islica Au–Cu deposit: A) Intermediate sulphidation, hosted mainly in quartz veins, comprises pyrite, chalcopyrite, sphalerite and galena as the major sulphides, which are accompanied by a variety of Ag-bearing accessory minerals. Au–Ag alloys are the only gold-bearing phase. The veins are enclosed by sericitic and chloritic alteration. Fluid inclusions in quartz, sphalerite and calcite give Th between 118–453 ºC, and salinities between 0.2–51.4 wt.% NaCl eq, with high salinities being related to high-grade mineralisation. Stable isotopes indicate magmatic and marine fluids. B) High sulphidation consists of massive host rock silicification with disseminated pyrite and minor chalcocite, covellite, native copper and native gold. The surrounding alteration is advanced argillic/argillic in style. Fluids have Th between 224–381 ºC have salinities between 0.4 and 41.1 wt.% NaCl eq. The stable isotope data demonstrate the dominance of magmatic fluids, and disproportion processesUniversidad de Granada. Departamento de Mineralogía y PetrologíaGrupo de Investigación de la Junta de Andalucía RNM-0131.Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR)The research has been supported by the project BTE 2001-3308 of DGI of Ministerio de Ciencia y Tecnología of Spain and the RNM 0131 Research Group of Junta de Andalucía. AJB is funded by NERC support of the Isotope Community Support Facility at SUERC

A database about the tornadic activity in Catalonia (NE Spain) since 1994

Póster elaborado para la 11th PLINIUS Conference in Mediterranean Storms celebrada del 7 al 11 de septiembre de 2009 en Barcelona

Assessment of the potential in vivo ecotoxicity of Double-Walled Carbon Nanotubes (DWNTs) in water, using the amphibian Ambystoma mexicanum

Because of their specific properties (mechanical, electrical, etc), carbon nanotubes (CNTs) are being assessed for inclusion in many manufactured products. Due to their massive production and number of potential applications, the impact of CNTs on the environment must be taken into consideration. The present investigation evaluates the ecotoxic potential of CNTs in the amphibian larvae (Ambystoma mexicanum). Acute toxicity and genotoxicity were analysed after 12 days of exposure in laboratory conditions. The genotoxic effects were analysed by scoring the micronucleated erythrocytes in the circulating blood of the larvae according to the French standard micronucleus assay. The results obtained in the present study demonstrated that CNTs are neither acutely toxic nor genotoxic to larvae whatever the CNTs concentration in the water, although black masses of CNTs were observed inside the gut. In the increasing economical context of CNTs, complementary studies must be undertaken, especially including mechanistic and environmental investigations

Resultados del estudio geológico a escala 1/25.000 del término municipal de Madrid.

Se exponen de forma abreviada los rasgos en cuanto a metodología y conclusiones del estudio geológico a escala 1/25000 realizado en el Municipio de Madrid en los años 1982/83. Las diferentes unidades expresadas en la cartografiase describen en función de las pautas mayores observables en los materiales que forman cada una de ellas, analizándose sus relaciones estratigráficas. El Proyecto «Estudio Geológico a escala 1/25000 del Término Municipal de Madrid ha sido llevado a cabo a lo largo de los años 1982-83 como resultado de la colaboración científica entre diversos organismos de la Administración (Facultad de CC. Geológicas-Universidad Complutense, Instituto Geológico y Minero. Ayuntamiento de Madrid, Instituto de Geología de Madrid-CSIC, y otros). Constituye una de las áreas de actuación definidas dentro del Convenio de Colaboración Técnica y Cultural para el conocimiento de las Características del Suelo y Subsuelo de Madrid», propiciado y patrocinado por el Excmo. Ayuntamiento. La financiación del proyecto especifico de Geología ha sido realizada íntegramente por el IGME, organismo encargado además de su supervisión. El desarrollo del Proyecto tiene un marcado carácter interdisciplinar, fruto del trasvase de información entre los distintos grupos que abarca el Convenio general (aparte de los ya referidos, el SGOP, COPLACO, Laboratorio «José Luis Escario» siendo precisamente uno de los objetivos del trabajo el servir de apoyo a las restantes áreas de investigación. Los estudios geológicos realizados se plasman en un total de siete mapas a escala 1/25000 elaborados según la normativa Magna de cartografía geológica mapas que toman como referencia, aunque en algunos casos no las completan y en otros adosan porciones de hojas adyacentes, las hojas 1/25000 de Madrid, Alcorcón, El Pardo, San Femando de Henares, Pozuelo de Alarcón, Alcobendas y Castillo de Viñuelas

Morphometric characteristics of the asterion and the posterolateral surface of the skull: relationship with dural venous sinuses and neurosurgical importance

abstract Background: Knowledge of the location and morphometry of the lateral venous sinus (transverse and sigmoid) and their relationship with the asterion and other surface anatomic landmarks is imperative for posterolateral approaches to the posterior cranial fossa to avoid vascular structure injury and surgical complications. We undertook this study to determine a secure anatomic area for drilling that allows entry into the posterior cranial fossa without damaging adjacent structures and study the morphometric characteristics of the asterion, the lateral sinus and bony landmarks of the posterolateral surface of the skull. methods: Using a 1.3-mm drill, both sides of 88 dry skulls (176 hemicranias) were drilled. The anatomic landmarks studied were the asterion, apex of the mastoid process, suprameatal spine, Frankfurt horizontal plane, posterior root of the zygomatic arch, external occipital protuberance and its relationship with the transverse sinus. results: Type I asterion is prevalent in 74.4%. In 82.4% of the specimens, the lateral venous sinus can be found lower than the asterion in 12.5% and higher in 5.1%. Conclusions: Using the data from this and other studies, the initial drill must be placed 15 mm below the asterion and 15 mm posterior to it to reduce the risk of injury to the lateral venous sinus

Thermography as a method of acquiring competences in Physiology. Application case for hand blood flow control

5 p.The present work proposes a methodological structure as part of the learning of the circulatory system. For this, the application of thermal stress is used, by immersing the hands in cold water to visualize the reperfusion of the hands. Learning, based on the visualization and analysis of thermographic images, allows the acquisition of specific competences at the university level. In graduate studies such as physiotherapy and nursing, the use of virtual tools and materials that allow the acquisition of skills and technical knowledge is essential for the job performance of future professionals. The application of this methodology is proposed in practical sessions of subjects in the area of knowledge of Physiology, to demonstrate and facilitate the understanding of the circulatory system. This approach is framed within the discipline of virtual laboratories since the virtual materials generated can be used for the acquisition of skills and practical competencies, as well as for the evaluation of competencies in e-learning courses. In this way, by recording a pedagogical video that shows a short practice, 5 minutes long, it is possible to establish the necessary knowledge bases to expand them later. This material is easily implementable in any learning management system.S

Overview and characterization of penile cancer content across social media platforms

BackgroundSocial media platforms (SMP) are an emerging resource that allows physicians, patients, and families to converse on cancer prevention, diagnosis, and treatment. We aimed to characterize penile cancer (PC) content shared on SMP.MethodsWe searched PC posts on Twitter, Facebook, and Instagram from July 1st, 2021, through June 30th, 2022. Two independent, blinded reviewers analyzed the hashtags: #PenileCancer, #PenileCancerAwareness, and #PenileNeoplasm. Descriptive statistics were used for posts characterization, Pearson´s correlation coefficient for associations, and Cohen’s weighted kappa coefficient for inter-rater agreement rate.ResultsA total of 791 posts were analyzed, with Twitter accounting for 52%, Facebook for 12.2%, and Instagram for 35.5%, and. Most posts originated from high-income countries, such as the United Kingdom (48.8%). We found no correlation between the number of posts with PC incidence (p = 0.64) or users on SMP (p = 0.27). Most accounts were classified as “support and awareness communities” (43.6%) and “physicians and clinical researchers” (38.2%). Urology was the most common medical specialty to post (60.9%), followed by oncology (11.3%). Most posts were classified as “prevention and awareness for users” (45.1%). Global inter-reviewer agreement rate was almost perfect (k=0.95; p ≤ 0.01). On Twitter, “physicians and clinical researchers” shared more content on “treatment updates and medical papers published in medical journals,” while on Facebook and Instagram, “support and awareness communities” focused on “personal and support comments.”ConclusionOverall, the number of PC posts was low compared to other neoplasms across the SMP evaluated in this study. “Physicians and clinical researchers” shared more content on Twitter, while “support and awareness communities” on Facebook and Instagram. Encouraging the use of a common SMP among the medical community and general users could lead to a more effective communication between physicians, patients, and support groups, and to increased awareness of PC