Magnetism of metastable γ-Fe85Pd15 nanowire arrays across an unusually broad temperature range (5 K to 800 K).

Arrays of 50 nm diameter Fe85Pd15 cylindrical nanowires were electrochemically grown, crystallizing in a metastable γ-Fe(Pd) fcc A1 disordered solid solution. After performing a heating-cooling thermal cycle between 300 K and 1000 K, the γ-Fe(Pd) fcc metastable phase still predominates (97%), coexisting with a not-fully-identified minority phase. The thermal cycling induces a moderate increase in the crystallite size and a reduction of the lattice parameter although leading to a significant heating-cooling magnetic hysteresis. No further changes in temperature-dependent magnetization, M(T), are observed during subsequent cycling. The full-range (5 K to 800 K) saturation magnetization Ms(T) curve is quite accurately described by a phenomenological expression, which provides a Bloch-type contribution as T → 0 and undergoes the critical behavior near the Curie temperature TC. An upturn in Ms(T) is observed below 100 K which is described by a spin-glass-like second contribution, with freezing temperature Tf = (80 ± 2) K, and kBTf comparable to the exchange interactions in Fe-Pd systems. A Curie temperature of TC = 830 K, and a critical exponent value ß = 0.42 ± 0.05 are estimated. These regimes (below and above 100 K) are also observed in the magnetization process. The temperature dependence of coercivity between 100 K and 800 K is consistent with a nucleation/propagation remagnetization mechanism, with activation energy of (320 ± 20) kJ mol-1 and critical field for magnetization reversal of (65 ± 1) mT, at 0 K. The analysis of the effective magnetic anisotropy as a function of temperature allows us to conclude that it essentially arises from the balance between different magnetostatic contributions.

Geographical and gender differences in the development of motor skills in preschool children / Diferenças geográficas e de género no desenvolvimento das capacidades motoras das crianças em idade pré-escolar

ABSTRACT Motor development during childhood is fundamental for acquiring advanced perceptual and cognitive skills, playing a pivotal role in personal development and skill acquisition later in life. This study aims to investigate differences in the motor skills of children between the ages of 3 to 5, based on their geographic location (urban or rural) and gender. A cohort of 94 Portuguese children between the ages of 3 and 5 years old (comprising 48 boys and 46 girls) were selected for a study. Data collection was conducted within 8 different schools, and motor skills were assessed utilizing the MOBAK-KG test. It was observed that children from urban areas outperformed those from rural areas in motor skills related to body and object control. On the contrary, girls' motor skills did not show significant differences according to their geographical location. Although the geographical environment influences children's motor development, other factors, such as socio-economic and cultural factors, may have a greater impact on girls. These findings emphasise the significance of focusing on the motor development of girls and examining how cultural and gender expectations can impact their motor skills.

RESUMO O desenvolvimento motor durante a infância é fundamental para a aquisição de competências perceptivas e cognitivas avançadas, desempenhando um papel fulcral no desenvolvimento pessoal e na aquisição de competências mais tarde na vida. Este estudo tem como objetivo investigar as diferenças nas capacidades motoras de crianças entre os 3 e os 5 anos de idade, com base na sua localização geográfica (urbana ou rural) e género. Foi selecionada para o estudo uma coorte de 94 crianças portuguesas com idades compreendidas entre os 3 e os 5 anos (48 meninos e 46 meninas). A recolha de dados foi efectuada em 8 escolas diferentes e as capacidades motoras foram avaliadas utilizando o teste MOBAK-KG. Verificou-se que as crianças das zonas urbanas superavam as das zonas rurais nas capacidades motoras relacionadas com o controlo do corpo e dos objectos. Pelo contrário, as capacidades motoras das raparigas não apresentaram diferenças significativas em função da sua localização geográfica. Embora o ambiente geográfico influencie o desenvolvimento motor das crianças, outros factores, tais como os factores socioeconómicos e culturais, podem ter um maior impacto nas raparigas. Estes resultados sublinham a importância de nos concentrarmos no desenvolvimento motor das raparigas e de examinarmos a forma como as expectativas culturais e de género podem ter impacto nas suas capacidades motoras.

Consensus-based recommendations on physical activity and exercise in patients with diabetes at risk of foot ulcerations: a Delphi study.

BACKGROUND: Patients with diabetes mellitus are exposed to important complications. Currently little evidence exist on the guidelines that these patients, at some risk of foot ulceration, should follow for physical exercise. OBJECTIVES: To reach a consensus among multidisciplinary and international experts on physical activity/exercise recommendations for patients with diabetes, according to foot ulcer risk. METHODS: Using a three-round Delphi method, a panel composed of 28 multidisciplinary experts in the management of diabetic foot assessed 109 recommendations on physical activity/exercise for patients with diabetes mellitus, according to their risk of foot ulcer. Consensus was assumed when 80% of responses matched the same category (agreement/disagreement). RESULTS: Twenty-nine experts participated in the first and second rounds of consultation, and twenty-eight did so in the third, reaching final agreement on 86 of the 109 recommendations considered (78.9%). The study, thus, generated a consensus set of recommendations concerning different aspects of diabetic footcare before, during, and after exercise (e.g. when to examine the foot, how to assess it, what type of sock and insole to use, what types of exercise to perform, and when it is advisable to return to activity after an ulceration). CONCLUSION: This Delphi study generated recommendations based on the consensus of international experts on physical activity and exercise by patient with diabetes at risk of ulceration. Recommendations considered the state of the foot and the patient's history and status before physical activity and included information on intensity, duration, frequency, and progressions of physical activity/exercise, and the use of custom-made plantar orthoses, shoe prescription, and the convenience of returning to physical activity after an ulceration.

La hipertensión arterial en animales de laboratorio / High blood pressure in experimental animals

Las Ciencias Médicas y Biológicas requieren, prioritariamente, que la investigación y la experimentación sean desarrolladas sobre organismos completos (los modelos animales). Su utilización ha permitido desarrollar innumerables ensayos preclínicos para evaluar los mecanismos patógenos y terapéuticos de diversas enfermedades, así como el estudio de las causas, naturaleza y cura de múltiples desórdenes de la salud humana. En este trabajo se muestra una panorámica general de los biomodelos de hipertensión arterial donde se describen: conceptos, características, origen, importancia, utilidad y procedimientos experimentales durante su fase de inducción. También se pondera la justificación de los biomodelos empleados en los estudios preclínicos de esta enfermedad. De igual forma, se describen los antecedentes para medir las alteraciones, las técnicas y los métodos directos e indirectos de medición de la presión arterial, la cual fue provocada experimentalmente en los animales de laboratorio para realizar los estudios de hipertensión humana.

Medical and biological sciences require, as a priority, that research and experimentation be carried out on complete organisms (animal models). Its use has allowed the development of innumerable preclinical tests to evaluate pathogenic and therapeutic mechanisms of various diseases, as well as to study the causes, nature and cure of multiple human health disorders. In this work, we show a general overview of arterial hypertension biomodels where concepts, characteristics, origin, importance, utility and experimental procedures during their induction phase are described. The justification of the biomodels used in preclinical studies of this disease is also considered. Antecedents are also described to measure alterations, techniques and direct and indirect methods of measurement of arterial pressure, which was provoked experimentally in the laboratory animals to carry out the studies of human hypertension.

Manual para la preparación en temas de investigación experimental en las ciencias básicas biomédicas / Manual for training on experimental research topics in basic biomedical sciences

Fundamento: los contenidos referentes a los temas de investigación experimental en las diferentes especialidades de las ciencias básicas biomédicas son de elevada complejidad, y la literatura relacionada se encuentra de manera dispersa y escasa. Objetivo: diseñar un manual para la preparación en temas de investigación experimental de los residentes de las ciencias básicas biomédicas. Métodos: se realizó un estudio descriptivo transversal desde septiembre-2012 hasta junio-2019 en la Unidad de Investigaciones Biomédicas de la Universidad de Ciencias Médicas de Villa Clara. Se emplearon los métodos teóricos: analítico-sintético, inductivo-deductivo, sistémico-estructural y modelación; empírico: análisis documental. Se seleccionaron 11 expertos para la valoración del manual en cuanto a su pertinencia, autenticidad, actualidad, estructura metodológica, cientificidad y posible generalización. Resultados: se diseñó un material de procedimientos que facilita la consulta de los residentes para su preparación en temas de investigación experimental con modelos biológicos. Está conformado por un prólogo, tres capítulos y un acápite para la literatura consultada, en los que la temática es abordada de forma didáctica con actualización de los aspectos conceptuales, teóricos e históricos. Contiene fotografías tomadas por los propios autores y un lenguaje sencillo, que facilitan la comprensión de procedimientos que se adaptan por primera vez a las condiciones de los centros experimentales de Cuba. Conclusiones: el manual diseñado propicia la preparación requerida en temas de investigación experimental en los especialistas en formación, como aspecto significativo en la educación de los residentes de las ciencias básicas biomédicas, acorde con las exigencias de la enseñanza médica superior.

Background: the contents referring to experimental research topics in the different specialties of basic biomedical sciences are highly complex, and the related literature is scattered and scarce. Objective: to design a manual for the training of residents of basic biomedical sciences in experimental research topics. Methods: a cross-sectional descriptive study was carried out from September-2012 to June-2019 at the Biomedical Research Unit of Villa Clara University of Medical Sciences. Theoretical methods were used: analytical-synthetic, inductive-deductive, systemic-structural and modeling; empirical ones: documentary analysis. Eleven experts were selected to assess the manual in terms of its relevance, authenticity, timeliness, methodological structure, scientificity, and possible generalization. Results: a procedure material was designed that facilitates the consultation of the residents for their training in experimental research topics with biological models. It is made up of a prologue, three chapters and a section for the literature consulted, in which the subject is addressed in a didactic way with updating of the conceptual, theoretical and historical aspects. It contains photographs taken by the authors themselves and simple language, which facilitate the understanding of procedures that are adapted for the first time to the conditions of the experimental centers in Cuba. Conclusions: the designed manual promotes the preparation required in experimental research topics in training specialists, as a meaningful aspect in the education of residents of basic biomedical sciences, in accordance with the requirements of higher medical education.

Herida por asta de toro en el medio rural. Importancia de la preparación en cirugía taurina: Reporte de caso / Bull Horn Wounds in Rural Areas Importance of Preparation in Bullfighting Surgery: Case Report / Lesão com chifre de touro em zonas rurais. Importância da preparação em cirurgia tauromáquica: Relato de caso

Introducción. El trauma abdominal penetrante causado por embestida de asta de toro representa menos del 3%. Son heridas que deben ser consideradas sucias, y la primera causa de muerte por este tipo de trauma es el shock hipovolémico. Presentación de caso. Se presenta el caso de un hombre de 60 años con trauma abdominal penetrante por asta de toro en flanco izquierdo e hipogastrio de 18x8 cm de extensión, con evisceración aguda traumática. Fue llevado a laparotomía exploratoria, donde no se evidenciaron lesiones de órganos sólidos ni de vísceras huecas. El paciente evolucionó sin complicaciones. Discusión. Las heridas por asta de toro dadas sus características son consideradas sucias y alcanzan hasta un 50% de infección. Dentro de su manejo inicial se deben incluir antibióticos y abordajes quirúrgicos, según cada caso. Conclusión. El trauma abdominal penetrante causado por embestida de asta de toro es un mecanismo poco frecuente; sin embargo, los cirujanos deben estar entrenados para tratar o no de manera quirúrgica a este tipo de pacientes.

Introduction. Penetrating abdominal trauma caused by bull horn ramming represents less than 3%. These are wounds that should be considered dirty, and the leading cause of death from this type of trauma is hypovolemic shock. Case Presentation. A 60-year-old man with penetrating abdominal trauma by bull horn in the left flank and hypogastrium, 18x8 cm in extension, with acute traumatic evisceration. He was taken to exploratory laparotomy, where no solid organ or hollow viscera lesions were evidenced. The patient evolved without complications. Discussion. Given their characteristics, bull horn wounds are considered dirty and have an infection rate of up to 50%. Initial management should include antibiotics and surgical approaches, according to each case. Conclusion. Penetrating abdominal trauma caused by bull horn ramming is an infrequent mechanism; however, surgeons must be trained to treat or not to treat this type of patient surgically.

Introdução. O trauma abdominal penetrante causado pelo impulso de chifre de touro representa menos de 3%. São feridas que devem ser consideradas sujas, e a principal causa de morte por esse tipo de trauma é o choque hipovolêmico. Apresentação do caso. Homem de 60 anos com trauma abdominal penetrante por chifre de touro no flanco esquerdo e hipogástrio, 18x8 cm de extensão, com evisceração traumática aguda. Foi encaminado para laparotomia exploratória, onde não foram encontradas lesões em órgãos sólidos ou vísceras ocas. A paciente evoluiu sem complicações. Discussão. Devido às suas características, as feridas de chifre de touro são consideradas sujas e atingem até 50% de infecção. Dentro de seu manejo inicial, antibióticos e abordagens cirúrgicas devem ser incluídos, de acordo com cada caso. Conclusão. Trauma abdominal penetrante causado pelo impulso de chifre de touro é um mecanismo raro; no entanto, os cirurgiões devem ser treinados para tratar esses tipos de pacientes cirurgicamente ou não.

Plataforma CLIMSS como herramienta de alfabetización en salud durante la crisis sanitaria de Covid-19.

OBJETIVO: Describir a la plataforma Cursos en Línea Masivos del IMSS (CLIMSS) como herramienta de alfabetización en salud, a través de la evaluación de la eficiencia terminal, la ganancia de competencias y satisfacción de los usuarios de cursos en línea masivos en el tema de Covid-19. Material y métodos. Se analizaron datos de 20 cursos ofertados entre marzo y octubre de 2020. Se evaluaron las calificaciones pre y pos, el número total de registros, el total de cursos terminados y la satisfacción del usuario. RESULTADOS: Se registraron un total de 4.9 millones de usuarios y 10 millo-nes de inscripciones, en todos los estados de la República mexicana, con una eficiencia terminal de 85%, una ganancia de competencias de 30% y una satisfacción de 9.34 (10). CONCLUSIONES: La plataforma CLIMSS ha mostrado ser una herramienta para la alfabetización en salud con un alcance de millones de mexicanos en temas relacionados con la crisis sanitaria Covid-19.

Plataforma CLIMSS como herramienta de alfabetización en salud durante la crisis sanitaria de Covid-19 / CLIMSS online platform as a health literacy tool during the health crisis of Covid-19

Resumen: Objetivo: Describir a la plataforma Cursos en Línea Masivos del IMSS (CLIMSS) como herramienta de alfabetización en salud, a través de la evaluación de la eficiencia terminal, la ganancia de competencias y satisfacción de los usuarios de cursos en línea masivos en el tema de Covid-19. Material y métodos: Se analizaron datos de 20 cursos ofertados entre marzo y octubre de 2020. Se evaluaron las calificaciones pre y pos, el número total de registros, el total de cursos terminados y la satisfacción del usuario. Resultados: Se registraron un total de 4.9 millones de usuarios y 10 millones de inscripciones, en todos los estados de la República mexicana, con una eficiencia terminal de 85%, una ganancia de competencias de 30% y una satisfacción de 9.34 (10). Conclusiones: La plataforma CLIMSS ha mostrado ser una herramienta para la alfabetización en salud con un alcance de millones de mexicanos en temas relacionados con la crisis sanitaria Covid-19.

Abstract: Objective: To describe the Massive Online Open Courses (MOOC) or Cursos en Línea Masivos del IMSS (CLIMSS) platform as a health literacy tool by evaluating the terminal efficiency, the competence gains, and the users' satisfaction of the massive online courses offered by the Mexican Institute of Social Security, on Covid- 19. Materials and methods: Data from 20 courses offered between March and October 2020 were analyzed. We evaluated scores from the pre and post-tests, the total number of registries, total courses completed, and users' satisfaction. Results: We registered a total of 4.9 million users and 10 million registrations, in all Mexican states, with a terminal efficiency of 85%, a competence gain of 30%, and a users' satisfaction of 9.34 (10). Conclusions: The CLIMSS platform has proven to be a tool for health literacy reaching millions of Mexicans on Covid-19 related topics.

Aspectos clínicos y preclínicos en la investigación de la enfermedad periodontal inflamatoria y la diabetes / Preclinical and clinical aspects in the study of inflammatory periodontal disease and diabetes

RESUMEN La investigación biomédica genera evidencia científica valiosa para mejorar los esquemas de tratamiento de enfermedades de los seres humanos. La enfermedad periodontal inflamatoria crónica afecta los tejidos de protección y soporte del diente; es una de las infecciones crónicas más prevalentes. Su etiología es multifactorial (las bacterias constituyen el factor primario). La placa dental es un biofilm en el que los microorganismos anaerobios dominan; se puede dividir en gingivitis y periodontitis. La gingivitis es un estado inflamatorio de las encías, sin pérdida de fibras de inserción periodontal o del hueso alveolar. En la periodontitis se produce la destrucción progresiva de las fibras de colágeno y de las estructuras óseas de soporte; está relacionada con diferentes complicaciones sistémicas, entre ellas: la diabetes mellitus (trastorno metabólico que se caracteriza por la hiperglucemia). Esta revisión permitirá a los especialistas investigar, a escala preclínica, aspectos importantes de estas enfermedades en los roedores de laboratorio.

ABSTRACT Biomedical research generates valuable scientific evidence to improve human disease treatment schemes. Chronic inflammatory periodontal disease affects the protective and supporting tissues of the teeth; it is one of the most prevalent chronic infections. Its etiology is multifactorial (bacteria are the primary factor). Dental plaque is a biofilm in which anaerobic microorganisms dominate; it can be divided into gingivitis and periodontitis. Gingivitis is an inflammatory state of the gums, without loss of periodontal attachment fibers or alveolar bone. Progressive destruction of collagen fibers and supporting bone structures occurs in periodontitis; it is related to different systemic complications, including diabetes mellitus (a metabolic disorder characterized by hyperglycemia). This review will allow specialists to investigate, on a preclinical scale, important aspects of these diseases in laboratory rodents.

Association Between Substance Use Behaviors, Developmental Assets and Mental Health: A Glance at Latin American Young College Students.

Positive Youth Development (PYD) is an approach that promotes resilience and focuses on youth strengths rather than their weaknesses as done by the traditional deficit-based perspective. Research in Europe and North America show that developmental assets are associated with school success, psychological well-being, and lower health risks among youth and young adults. However, not much research has been done on these associations in Latin American contexts. The purpose of this research study is to assess the association between substance use behaviors, such as drunkenness and the use of illicit drugs, and mental health, together with the mediating role of developmental assets representing youth strengths (e.g., social competence) and contextual resources (e.g., social support at home or school). Cross-national data was collected from Colombian (n = 210; 70.4% females) and Peruvian (n = 349; 66.5% females) 1st year university students. Results shed light on the protective role of developmental assets regarding substance use behaviors and mental well-being. Specifically, the results showed direct negative associations between developmental assets and substance use behaviors and positive associations of developmental assets with mental health indicators. Internal assets appear to be a stronger predictor of social, emotional, and psychological well-being compared to external assets. We did not find any statistical significance in the association of substance use behavior and mental health. We discuss implications regarding research, policy, and practice.

Point-of-care ultrasound by the pediatrician in the diagnosis and follow-up of community-acquired pneumonia

Abstract Objectives: To review, analyze, and present the available evidence on the usefulness of point-of-care pulmonary ultrasound in the diagnosis and monitoring of community-acquired pneumonia (CAP), aiming to facilitate its potential inclusion into pediatric clinical reference guidelines. Source of data: A non-systematic research was carried out in the MEDLINE (PubMed), LILACS, and SciELO databases, from January 1985 to September 2019. The articles that were considered the most relevant were selected. Synthesis of data: CAP is a relevant cause of morbidity and mortality in pediatrics and its clinical management remains a major challenge. The systematic use of chest X-ray for its diagnosis is controversial because it exposes the child to ionizing radiation and there are interobserver differences in its interpretation. Recently, the use of point-of-care pulmonary ultrasound by the pediatrician has been presented as an alternative for the diagnosis and monitoring of CAP. A great deal of evidence has disclosed its high sensitivity and diagnostic specificity, with the advantages of no ionizing radiation, relatively low cost, immediate results, portability, and the possibility of repetition according to the requirements of disease evolution. Moreover, its use can help rule out possible bacterial etiology and thus prevent inappropriate antibiotic treatments that favor bacterial resistance. Conclusions: Point-of-care ultrasonography represents an opportunity to improve the diagnosis and monitoring of CAP. However, as an operator-dependent technique, training is required for adequate image acquisition, correct interpretation, and integration with clinical data for correct decision-making.

Point-of-care ultrasound by the pediatrician in the diagnosis and follow-up of community-acquired pneumonia.

OBJECTIVES: To review, analyze, and present the available evidence on the usefulness of point-of-care pulmonary ultrasound in the diagnosis and monitoring of community-acquired pneumonia (CAP), aiming to facilitate its potential inclusion into pediatric clinical reference guidelines. SOURCE OF DATA: A non-systematic research was carried out in the MEDLINE (PubMed), LILACS, and SciELO databases, from January 1985 to September 2019. The articles that were considered the most relevant were selected. SYNTHESIS OF DATA: CAP is a relevant cause of morbidity and mortality in pediatrics and its clinical management remains a major challenge. The systematic use of chest X-ray for its diagnosis is controversial because it exposes the child to ionizing radiation and there are interobserver differences in its interpretation. Recently, the use of point-of-care pulmonary ultrasound by the pediatrician has been presented as an alternative for the diagnosis and monitoring of CAP. A great deal of evidence has disclosed its high sensitivity and diagnostic specificity, with the advantages of no ionizing radiation, relatively low cost, immediate results, portability, and the possibility of repetition according to the requirements of disease evolution. Moreover, its use can help rule out possible bacterial etiology and thus prevent inappropriate antibiotic treatments that favor bacterial resistance. CONCLUSIONS: Point-of-care ultrasonography represents an opportunity to improve the diagnosis and monitoring of CAP. However, as an operator-dependent technique, training is required for adequate image acquisition, correct interpretation, and integration with clinical data for correct decision-making.

Vía aérea difícil en paciente con Síndrome de Sagliker / CEPHALIC DUODENOPANCREATIC RESECTION - Pathology, complications, follow-up (Part II)

Introducción: El síndrome de Sagliker es una enfermedad rara que requiere manejo de la vía aérea por personal experimentado, fue descrito en 2004 por Sagliker. Presentación del caso: Mujer de 30 años de edad, hipertensa con enfermedad renal crónica de 10 años de evolución, trasplante renal derecho con rechazo al año y manejada con hemodiálisis. Se le realizó paratiroidectomía bilateral, el manejo de la vía aérea fue con la paciente despierta y uso de fibroscopio. La evolución transoperatoria fue buena, se extubó sin incidentes y después de 3 días fue egresada a su domicilio. Conclusiones: El manejo de la vía aérea en pacientes con Síndrome de Sagliker requiere de experiencia ya que un manejo inadecuado compromete la vida de los pacientes.

Sagliker syndrome is a rare disease that requires airway management by experienced personnel, it was described in 2004 by Sagliker. Case presentation: 30-year-old woman, hypertensive with chronic kidney disease of 10 years of evolution, right kidney transplant with one-year rejection and managed with hemodialysis. A bilateral parotidectomy was performed, the airway was managed with the patient awake and using a fibroscope. The intraoperative evolution was good, she was extubated without incident and after 3 days she was discharged to her home. Conclusions: The management of the airway in patients with Sagliker Syndrome requires experience, since inadequate management compromises the lives of patients.

Laboratorio de Cirugía Experimental: innovación tecnológica al servicio de la asistencia, la docencia e investigación / Laboratory of Experimental Surgery: technological innovation at the service of teaching, research and medical assistance

RESUMEN El Laboratorio de Cirugía Experimental de la Universidad de Ciencia Médicas de Villa Clara cuenta con la tecnología necesaria para el montaje y desarrollo de técnicas y habilidades quirúrgicas y microquirúrgicas, las cuales son utilizadas por los profesionales y estudiantes en la docencia y la investigación biomédica. Se realizaron varias innovaciones con la recuperación de equipos, instrumentos y materiales en desuso; se creó el gimnasio quirúrgico conformado por modelos inanimados sintéticos, y se implementó el modelo «pollo¼, como técnica alternativa al uso de animales vivos en la experimentación animal. Se han desarrollado: importantes proyectos de investigación, entrenamientos de cirugía y microcirugía experimental, diversos programas docentes, y exitosos cursos internacionales con estudiantes y residentes. El laboratorio constituye un valioso aporte de alternativas éticas, económicas y sanitarias, que han favorecido la formación de recursos humanos y un servicio científico-técnico de calidad para la docencia y la investigación.

ABSTRACT The Laboratory of Experimental Surgery at the University of Medical Sciences of Villa Clara has the necessary technology for the assembly and development of skills, as well as, surgical and microsurgical techniques, which are used by professionals and students in teaching and biomedical research. Several innovations were made with the recovery of equipments, instruments and disused materials; the surgical gymnasium was made up of synthetic inanimate models, and the "chicken" model was implemented as an alternative technique to the use of live animals in animal experimentation. Important research projects, training in surgery and experimental microsurgery, diverse teaching programs, and successful international courses with students and residents have been developed. The laboratory constitutes a valuable contribution of ethical, economic and sanitary alternatives, which have favored the formation of human resources and a qualified scientific-technical service for teaching and research.

Pseudomonas fildesensis sp. nov., a psychrotolerant bacterium isolated from Antarctic soil of King George Island, South Shetland Islands.

The strain KG01T was isolated from a soil sample from King George Island, Antarctica. Cells of KG01T are rod-shaped and motile by means of multiple polar flagella. The absence of arginine dihydrolase activity could be a key feature to readily distinguish KG01T from its closest phylogenetic relative species. The main fatty acids of the strain include summed feature 3 (C16 : 1 ω7c and/or C15 : 0 iso 2-OH), C16 : 0 and C18 : 1 ω7c. Phylogenetic analysis based on the 16S rRNA gene sequence and on a multilocus sequence analysis (MLSA) using housekeeping genes (16S rRNA, rpoB, rpoD, gyrB) were carried out. These analyses allowed us to include the strain within the Pseudomonas fluorescens group, presenting the highest similarity of multilocus sequence with Pseudomonas veronii LMG 17761T (96.67 %). The genome of KG01T was sequenced and in silico compared with genomes of the most closely related species of the P. fluorescens group. The average nucleotide identity (ANIb) and average amino acid identity (AAI) values of the species phylogenetically closest to KG01T were less than 95-96 %, threshold currently accepted to define strain as belonging to a bacterial species, the highest scores being those to Pseudomonas veronii LMG 17761T (87.98 %) and Pseudomonas marginalis ICMP 3553T (91.90 %). Therefore, the phenotypic and genotypic analyses results, allow us to propose that KG01T represents a member of a novel species of the genus Pseudomonas, for which the name Pseudomonas fildesensis is proposed, and KG01T (=CECT 9084T;=DSM 102036T) is established as the type strain .

Metabolic rate and hypoxia tolerance in Girardinichthys multiradiatus (Pisces: Goodeidae), an endemic fish at high altitude in tropical Mexico.

The darkedged splitfin (Amarillo fish), Girardinichthys multiradiatus is a vulnerable endemic fish species inhabiting central Mexico's high altitude Upper Lerma Basin, where aquatic hypoxia is exacerbated by low barometric pressures (lower PO2s), large aquatic oxygen changes, poor aquatic systems management and urban, agricultural and industrial pollution. The respiratory physiology of G. multiradiatus under such challenging conditions is unknown - therefore the main goal of the present study was to determine metabolic rates and hypoxia tolerance to elucidate possible physiological adaptations allowing this fish to survive high altitude and increasingly eutrophic conditions. Fish came from two artificial reservoirs - San Elías and Ex Hacienda - considered refuges for this species. Both reservoirs showed high dial PO2 variation, with hypoxic conditions before midday and after 20:00 h, ~4 h of normoxia (15 kPa) from 16:00-20:00, and ~4 h of hyperoxia (16-33 kPa) from 12:00-16:00. Standard metabolic rate at 20 ±â€¯0.5 °C of larvae from Ex Hacienda was significantly higher than those from San Elías, but these differences disappeared in juveniles and adults. Metabolic rate at 20 ±â€¯0.5 °C for adults was 9.8 ±â€¯0.1 SEM µmol O2/g/h. The metabolic scaling exponent for adults was 0.58 for San Elías fish and 0.83 for Ex Hacienda fish, indicating possible ecological effects on this variable. Post-larval fish in Ex Hacienda and all stages in San Elias site showed considerable hypoxia tolerance, with PCrit mean values ranging from 1.9-3.1 kPa, lower than those of many tropical fish at comparable temperatures. Collectively, these data indicate that G. multiradiatus is well adapted for the hypoxia associated with their high-altitude habitat.

Production of fatty acid methyl esters and bioactive compounds from citrus wax.

Citrus wax is a waste generated during the purification process of the citrus essential oil. A lot of citrus wax wastes are globally produced, despite this, its composition and properties are not well known. Here we present comprehensive results proving the chemical composition and the physical properties of citrus wax. Additionally, our study provides the basis for obtaining value-added products from citrus wax wastes. The qualitative/quantitative analysis revealed the presence of different compounds, which range from flavonoids, saponins, carbohydrates, unsaturated compounds, phenolic hydroxyls, and long-chain fatty acid esters. Given that citrus wax is a source of many bioactive compounds, they were preferably extracted with ethanol. The ethanolic extracts demonstrated the presence in citrus wax of different bioactives, such as 5-5'-dehydrodiferulic acid, 3,7-dimethylquercetin, 5,6-dihydroxy-7,8,3',4'-tetramethoxyflavone, tangeretin, and limonene. After the extraction of bioactives from citrus wax, a washed waxy material with high content of long-chain fatty acid esters was obtained. It was shown that this washed wax can be used for the production of biodiesel. The transesterification reactions in acid media was the preferred process because higher content of fatty acid methyl esters (such as hexadecanoic acid methyl ester and 9,12-octadecadienoic acid (Z,Z)-, methyl ester) were obtained. Currently, citrus wax does not have any industrial application, here we shown that under the concept of waste biorefinery, the citrus wax wastes are useful sources for producing value-added products such as bioactive compounds and biodiesel.

Curso clínico de micosis producidas por Exophiala xenobiotica en paciente trasplantado renal en el Hospital Universitario de Burgos / Clinical course of micosis produced by exophiala xenobiotica in renal transplanted patient at the University Hospital of Burgos

Resumen Las micosis por Exophiala xenobiotica comprenden un amplio espectro clínico en pacientes inmunosuprimidos, desde infecciones localizadas, hasta diseminadas. Son incluidas como etiología de las feohifomicosis, actualmente consideradas como infecciones fúngicas emergentes en pacientes trasplantados de órgano sólido. Presentamos 2 casos de micosis por Eexophiala xenobiotica en paciente trasplantado renal, una micosis cutánea localizada y una infección sistémica con afectación del sistema nervioso central.

Abstract Mycosis by exophiala xenobiotica comprise a broad clinical spectrum in immunosuppressed patients, from localized to disseminated infections. They are a recognized etiology of phaeohyphomycosis, currently considered as emerging fungal infections in transplanted solid organ recipients. We present 2 cases of mycosis by exophiala xenobiotica in kidney transplant recipients, a localized cutaneous mycosis and a systemic infection with central nervous system involvement.

El involucramiento afectivo como factor de protección contra el consumo de sustancias / Affective involvement as factor a protection against substance use / O envolvimento emocional como fator de proteção contra o consumo de substâncias / L'engagement affectif comme facteur de protection contre la consommation de substances addictives

Resumen Objetivo: Identificar la relación entre el involucramiento afectivo, la farmacodependencia y la conducta alcohólica en familias con hijos adolescentes. Materiales y Métodos: Se realizó en una población de 342 estudiantes de bachillerato, se captó una muestra de 272 sujetos. El muestreo fue estratificado, por grado y grupo, con edades entre 14, 15 y 16 años, quienes respondieron el Instrumento de Problemas Familiares, elaborado por Magdalena Espinosa y Gómez 2006 y el Cuestionario de Evaluación del Funcionamiento Familiar, construido por Raquel Atri y Zetune en 2006. Se realizó una prueba t de student para evaluar las diferencias entre el involucramiento afectivo funcional y disfuncional de mamá y papá. Resultados: Se encontraron diferencias estadísticamente significativas en la interacción familiar negativa, farmacodependencia en la familia, conducta alcohólica en la familia, comunicación e integración. Conclusiones: Las diferencias de ideas entre padre y madre señalan que la madre asume una función importante respecto al involucramiento afectivo y su relación con problemas familiares, considerando que éste favorece un sentimiento de comprensión, interés y apoyo, significativo para la protección del consumo de sustancias.

Abstract Objective: to identify the relationship between affective involvement with drug addiction and alcoholic behavior in families with adolescent children. Materials and methods: It was performed in a population of 342 high school students; a sample of 272 subjects was captured. Sampling was stratified, by grade and group, between 14, 15 and 16 years old, who answered the Family Problems Instrument prepared by Magdalena Espinosa y Gómez 2006 and the Family Performance Evaluation Questionnaire built by Raquel Atri and Zetune in 2006. A student's t-test was used to evaluate the differences between the functional and dysfunctional affective involvement of mom and dad. Results: With statistically significant differences in negative family interaction, family dependence, alcoholic behavior in the family, communication and integration. Conclusions: The Differences of ideas between father and mother indicate that the mother assumes an important role regarding affective involvement and its relationship with family problems, considering that it fosters a sense of understanding, interest and support, meaningful for the protection of substance use.

Resumo Objetivo: Identificar a relação entre o envolvimento emocional com as drogas e o comportamento alcoólico na familia com filhos adolescentes. Materiais e métodos: O estudo foi realizado numa população de 342 estudantes do ensino médio. A amostra foi estratificada por classe e grupo, com 272 indivíduos com idades de 14, 15 e 16 anos, que responderam ao Instrumento de Problemas Familiares elaborado por Magdalena Espinosa e Gómez 2006 e ao Questionário de Avaliação do Funcionamento Familiar construido por Raquel Atri e Zetune em 2006. O teste t de Student foi utilizado para avaliar as diferençãs entre o envolvimento emocional funcional e disfuncional dos pais Resultados: Encontraram-se diferençãs estatisticamente significativas na interação familiar negativa, o abuso de drogas na familia, o comportamento alcoólico da família, a comunicação e a integração. Conclusão: As diferençãs de ideias entre pai e máe indicam que a máe assume um papel importante no envolvimento emocional enfrentando os problemas da família. Este papel promove um sentimento de compreensáo, de apoio e de interesse, importante para proteger contra o consumo de substancias aditivas.

Résumé Objectif: Identifier la relation entre l'engagement affectif, et la pharmacodépendance et le comportement alcoolique dans les familles avec adolescent(s). Matériaux et méthodes: L'étude a été menée aupres d'une population de 342 lycéens. L'échantillon, stratifié par grade et par groupe, inclut 272 sujets, agés de 14, 15 et 16 ans, qui ont répondu a l'Instrument de Problemes Familiaux élaboré par Espinosa y Gómez et au Questionnaire d'Évaluation du Fonctionnement Familial de Atri et Zetune. Un test t de Student a été réalisé pour évaluer les differences en fonction de l'engagement affectif fonctionnel o dysfonctionnel du pere et de la mere. Résultats: Des différences statistiquement significatives dans l'interaction familiale négative, l'abus de drogues et les conduites alcooliques dans la famille, la communication et l'intégration ont été trouvées. Conclusions: Les différences d'idées entre le pere et la mere signalent que la mere tient un role important en ce qui concerne l'engagement affectif et sa relation avec les problemes familiaux. Ce role favorise un sentiment de compréhension, d'intéret et de soutien, significatif pour la protection contre la consommation de substances addictives.

Relación maestro - alcance del logro: Una mirada a los procesos de enseñanza en la escuela

El presente artículo tiene como objetivo contribuir a la reflexión sobre las prácticas pedagógicas y didácticas orientadas al alcance del logro académico que los docentes desarrollan en el escenario educativo de la escuela. Del mismo modo, observar si los ambientes de aprendizaje se encuentran direccionados a potenciar los saberes previos, la construcción de planteamientos y posiciones que permiten comprender desde una posición crítica las condiciones del contexto de desenvolvimiento de las y los educandos. Y por último, reconocer los cambios que deben asimilar los docentes en una sociedad que paulatinamente exige nuevos conocimientos y competencias. Por tanto, es una invitación a repensar las acciones pedagógicas, los procesos de enseñanza aprendizaje, las didácticas en las que se apoyan los docentes para orientar el alcance del logro académico de las y los educandos.

This article aims to contribute to the reflection on pedagogical and didactic practices oriented to the scope of academic achievement and teachers developed in the educational setting for the school. In the same way see if learning environments are directed to enhance the knowledge previous to the construction of approaches and positions that allow to understand from a position criticized conditions in the context of unfolding of the learners. And finally to recognize the changes that must be gradually assimilate the teachers in a society that requires new knowledge and skills. Therefore, it is an invitation to rethink the pedagogical actions, teaching-learning processes, and the didactics that support teachers to guide to achieve the academic achievement of the students.

Este artigo pretende contribuir para a reflexão sobre as práticas pedagógicas e didáticas destinadas a alcançar o desempenho acadêmico que os professores desenvolvem cenário educacional na escola. Da mesma forma, observar se os ambientes de aprendizagem são direcionados para aumentar o conhecimento prévio, a construção de abordagens e posições que permitam a compreensão de um condições de contexto posição crítica e desenvolvimento dos alunos. E, finalmente, reconhecer as mudanças que os professores deveriam assimilar em uma sociedade que exige gradualmente novos conhecimentos e habilidades. Portanto, é um convite a repensar os processos de ações, de ensino e aprendizagem pedagógicas, ensinando nas quais os professores são suportados para orientar o alcance e desempenho acadêmico dos estudantes.