A systematic review and meta-analysis on the effectiveness of xenograft to prevent periodontal defects after mandibular third molar extraction.

Background: To evaluate the use of guided bone regeneration with xenograft to prevent periodontal defect in the distal aspect of the second molar after the surgical removal of the mandibular third molar.Material and Methods: Three electronic databases (Pubmed, Cochrane Library and Scopus) were searched in April 2020. Randomized clinical trials in non-smokers and healthy patients, with at least six months follow-up, comparing periodontal probing depth, clinical attachment level, alveolar bone level and adverse events were selected by two independent investigators. The risk of bias assessment of the selected studies was evaluated by means of the Cochrane Collaboration's Tool. Finally, a meta-analysis of the outcomes of interest was performed.Results: Despite 795 articles were found in the initial search, only three randomized controlled clinical trials were included. Pooled results favoured the use of the xenograft plus collagen membrane over the spontaneous healing in terms of periodontal probing depth gain (MD=2.36; 95% CI 0.69 to 4.03; P=0.005) and clinical attachment level gain (MD=2.52; 95% CI 0.96 to 4.09; P=0.002). No other statistically significant differences were found. Conclusions: Within the limitations of the present review, the xenograft plus collagen membrane exhibited better periodontal results than spontaneous healing without increasing postoperative complications. However, future well-designed studies with larger samples are required to confirm our result

Adicción a las TIC. Perspectiva docente desde tres centros universitarios

Entre los análisis realizados con referencia al uso y abuso de las Tecnologías de la Información y la Comunicación existen diversos estudios aplicados a los más jóvenes, por ser el grupo que más concentra el consumo en línea. No obstante, poco se ha analizado sobre las tendencias y reflexiones realizadas al respecto por otro sector poblacional, no siempre diferente en edad, pero sí en sus propósitos y actividades cotidianas: los y las docentes. Como parte de este trabajo, se muestra un estudio hecho a docentes de tres centros universitarios de la Universidad de Guadalajara, quienes ofrecen su percepción sobre el consumo en la web a partir del Test de Uso de Internet elaborado por Kimberly Young. Los resultados muestran, en general, una tendencia racional en la utilización de la tecnología, aunque hay algunos indicios frecuentes en el caso de la pérdida de conciencia del tiempo de uso de internet, a sentir un cierto grado de ansiedad o nervios al no conectarse o así como a consultar redes sociales o el correo antes de iniciar actividades prioritarias. Este trabajo reafirma la necesidad de profundizar en estudios sobre el colectivo de docentes de los centros de estudio, ya que interesa tanto su afectación personal y profesional, como el papel que para ellos juega la tecnología y qué mensaje dan a las comunidades de estudiantes a las que atienden./Within the analyses made with reference to the use and abuse of Information and Communication Technologies, there are several research applied to young people, since they are the group that most concentrates online consumption. However, little has been analyzed about the trends and reflections made in this regard by another population sector, not always different in age, but in their purposes and daily activities: teachers. As part of this work, a study with teachers from three colleges of the University of Guadalajara is shown, who offer their perception of consumption on the web based on the Internet Addiction Test developed by Kimberly Young. The results show, in general, a rational tendency in the use of technology, although there are some frequent indications in the case of the loss of awareness of the time of Internet use, to feel a certain degree of anxiety or nervousness when not connected or to consult social networks or mail before starting priority activities. This work reaffirms the need to deepen studies on the group of teachers of the study centers, since both their personal and professional affectation is of interest, as well as the role that technology plays for them and what message they give to the student communities they serve

Adicción a las TIC. Perspectiva docente desde tres centros universitarios

Within the analyses made with reference to the use and abuse of Information and Communication Technologies, there are several research applied to young people, since they are the group that most concentrates online consumption. However, little has been analyzed about the trends and reflections made in this regard by another population sector, not always different in age, but in their purposes and daily activities: teachers. As part of this work, a study with teachers from three colleges of the University of Guadalajara is shown, who offer their perception of consumption on the web based on the Internet Addiction Test developed by Kimberly Young. The results show, in general, a rational tendency in the use of technology, although there are some frequent indications in the case of the loss of awareness of the time of Internet use, to feel a certain degree of anxiety or nervousness when not connected or to consult social networks or mail before starting priority activities. This work reaffirms the need to deepen studies on the group of teachers of the study centers, since both their personal and professional affectation is of interest, as well as the role that technology plays for them and what message they give to the student communities they serve.Entre los análisis realizados con referencia al uso y abuso de las Tecnologías de la Información y la Comunicación existen diversos estudios aplicados a los más jóvenes, por ser el grupo que más concentra el consumo en línea. No obstante, poco se ha analizado sobre las tendencias y reflexiones realizadas al respecto por otro sector poblacional, no siempre diferente en edad, pero sí en sus propósitos y actividades cotidianas: los y las docentes. Como parte de este trabajo, se muestra un estudio hecho a docentes de tres centros universitarios de la Universidad de Guadalajara, quienes ofrecen su percepción sobre el consumo en la web a partir del Test de Uso de Internet elaborado por Kimberly Young. Los resultados muestran, en general, una tendencia racional en la utilización de la tecnología, aunque hay algunos indicios frecuentes en el caso de la pérdida de conciencia del tiempo de uso de internet, a sentir un cierto grado de ansiedad o nervios al no conectarse o así como a consultar redes sociales o el correo antes de iniciar actividades prioritarias. Este trabajo reafirma la necesidad de profundizar en estudios sobre el colectivo de docentes de los centros de estudio, ya que interesa tanto su afectación personal y profesional, como el papel que para ellos juega la tecnología y qué mensaje dan a las comunidades de estudiantes a las que atienden.Dentro das análises feitas com referência ao uso e abuso das Tecnologias de Informação e Comunicação, há vários estudos aplicados aos mais jovens, pois é o grupo que mais concentra o consumo online. No entanto, pouco foi analisado sobre as tendências e reflexões que outro setor da população faz a esse respeito, nem sempre diferente em idade, mas sim em seus propósitos e atividades cotidianas: os professores. Como parte deste trabalho, mostra-se um estudo realizado com professores de três centros universitários da Universidade de Guadalajara, que oferecem sua percepção de consumo na web com base no Teste de Uso da Internet elaborado por Kimberly Young. Os resultados mostram, em geral, uma tendência racional no uso da tecnologia, embora existam algumas indicações frequentes no caso de perda de consciência do tempo de uso da Internet, sentir um certo grau de ansiedade ou nervosismo quando não se conecta ou como bem como verificar as redes sociais ou e-mail antes de iniciar as atividades prioritárias. Este trabalho reafirma a necessidade de aprofundar os estudos sobre o grupo de professores dos centros de estudos, uma vez que interessa tanto sua afetação pessoal e profissional, quanto o papel que a tecnologia desempenha para eles e que mensagem eles passam para as comunidades estudantis. eles serve

Momento Económico (49)

En este número: "¿Una nueva acumulación originaria?". "El Metro de la Ciudad de México. Desarrollo y perspectivas". "La agonía del Estado empresario". Sección de Indicadores Económicos. "Las 'zonas de producción libre' en la 'restructuración' de la economía mundial". "Estados Unidos: hegemonía en crisis". Sección de América Latina. Temas de Hoy

Biological Control of Fusarium oxysporum in Tomato Seedling Production with Mexican Strains of Trichoderma

The problems and limitations of the control of diseases caused by phytopathogens through the use of fungicides, make the biological control present as an alternative method in the production of tomato plants in greenhouse, which is limited by the incidence of Fusarium oxysporum Schlechtend.:Fr., being the most worldwide destructive disease. The objective of the present investigation was to evaluate the effect of three Mexican strains of the genus Trichoderma against F. oxysporum on the production of tomato seedlings under greenhouse conditions, as well as to determine the antagonistic effect of the strains used. The Trichoderma harzianum strain had the highest antagonistic activity (81.50%) and the highest growth rate (1.25 cm/day), proving to be the most aggressive strain to control F. oxysporum. in addition the results of the interaction of the dual cultures paired, presented a visible overgrowth zone with hyphae of Trichoderma spp. Seeds inoculated with T. harzianum showed a survival of 84% and a mortality of 16%, lower than the control group, which present a mortality of 58%; however, the treatment inoculated with F. oxysporum had the highest incidence of “disease” with 83%, the lowest survival (17%) and a decrease of the green biomass with respect to the control

CREB-binding protein (CBP) gene family regulates planarian survival and stem cell differentiation

In developmental biology, the regulation of stem cell plasticity and differentiation remains an open question. CBP(CREB-binding protein)/p300 is a conserved gene family that functions as a transcriptional co-activator and plays important roles in a wide range of cellular processes, including cell death, the DNA damage response, and tumorigenesis. The acetyl transferase activity of CBPs is particularly important, as histone and non-histone acetylation results in changes in chromatin architecture and protein activity that affect gene expression. Many studies have described the conserved functions of CBP/p300 in stem cell proliferation and differentiation. The planarian Schmidtea mediterranea is an excellent model for the in vivo study of the molecular mechanisms underlying stem cell differentiation during regeneration. However, how this process is regulated genetically and epigenetically is not well-understood yet. We identified 5 distinct Smed-cbp genes in S. mediterranea that show different expression patterns. Functional analyses revealed that Smed-cbp-2 appears to be essential for stem cell maintenance. On the other hand, the silencing of Smed-cbp-3 resulted in the growth of blastemas that were apparently normal, but remained largely unpigmented and undifferentiated. Smed-cbp-3 silencing also affected the differentiation of several cell lineages including neural, epidermal, digestive, and excretory cell types. Finally, we analysed the predicted interactomes of CBP-2 and CBP-3 as an initial step to better understand their functions in planarian stem cell biology. Our results indicate that planarian cbp genes play key roles in stem cell maintenance and differentiation

MAMÍFEROS DE CUATRO ÁREAS CON DIFERENTE GRADO DE ALTERACIÓN EN EL SURESTE DE MÉXICO

The mammals from four areas of Southeastern Mexico were examined to compare the species diversity in areas characterized by various degrees of disturbance caused by human activities such as felling of trees, cattle grazing, and agriculture. We examined 458 specimens from 52 species in the four study areas. Carlos A. Madrazo was the site with more species richness (n= 41) and also has the less disturbed vegetation, followed by Agua Dulce (n= 37) that presents some orchards that had changed the natural vegetation, and Jalapita (n= 28) and El Espino (n= 14), the areas with the most alteration in their vegetation. The differences found in the distribution of the species in the four areas indicate that most species prefer to inhabit the less disturbed areas with favorable conditions for their survival, suggesting that disturbance reduced the number of species in the studied zones. In Southeastern Mexico, Tabasco and Veracruz are among the states with the most disturbed areas in which the original vegetation has been substituted by grass. It is imperative that the authorities responsible for the conservation of species and use of the land implement a plan to educate local people on the sustainable use of natural resources so their protection and management can be achieved.Se examinaron 458 especímenes de mamíferos, con el objetivo de comparar la diversidad de las especies en cuatro sitios del sureste de México con diferentes grados de alteración causada por la tala de árboles, la ganadería y la agricultura. Tomando en cuenta a todas las especies capturadas y registradas, el área con la mayor riqueza de especies fue Carlos A. Madrazo (n= 41), que se caracteriza por tener la vegetación mejor conservada seguida de Agua Dulce (n= 37), que presenta huertos y zonas cercanas con vegetación natural, mientras que Jalapita (n= 28) y El Espino (n= 10) fueron los sitios más alterados y con menor diversidad de mamíferos. Las diferencias en la riqueza específica de las cuatro áreas indican que la alteración redujo el número de especies que habitan la zona de estudio. Tabasco y Veracruz se encuentran entre los estados más alterados de México, y una gran parte de su vegetación original ha sido sustituida por pastizales. Por esta razón es urgente que las autoridades responsables de la conservación de las especies y el uso del suelo implementen un plan para que la gente conozca el uso sustentable de los recursos naturales con la finalidad de reorientar su manejo y protección

National validation of the Nursing Intensive-Care Satisfaction Scale: research protocol

Aim: Validate the Nursing Intensive-Care Satisfaction Scale in ICUs throughout Spain. Identify the improvement strategies recommended by the patients and professionals. Design: Quantitative psychometric methodology and a cross-sectional descriptive correlational design.Methods: The study population will be all patients discharged from 19 participating ICUs in Spain. Consecutive sampling (n= 564). Once discharged from the ICUs, they will receive the questionnaire and then, after 48 hours it will be given to them again to analyse the temporal stability. To validate the questionnaire, the internal consistency (Cronbach's Alpha) and temporal stability (test-retest) will be analysed. Results: Improve the quality of nursing care by modifying, changing or strengthening behaviours, skills, attitudes or areas for improvement involved in the proces

Liderazgo en la Creación de Nuevos Modelos de Negocios: Comunidad Estudiantil de una (IES) del Estado de México

The article focuses on leadership in the creation of new business models in a Higher Education Institution (HEI) in the State of Mexico. The objective is to analyze how leadership influences the generation of innovative business models among students. A mixed methodology is used that combines surveys and interviews with students and teachers, as well as documentary analysis. The results reveal that leadership positively influences the motivation and ability of students to propose and develop creative business models. In addition, leadership characteristics such as inspiration, support and mentoring are identified as key elements to foster business innovation among students. These findings underline the importance of cultivating a leadership environment that fosters creativity and an entrepreneurial spirit in the student community, thus promoting the generation of new business models with a positive impact on the local economy and beyond.El articulo se centra en el liderazgo en la creación de nuevos modelos de negocios en una Institución de Educación Superior (IES) en el Estado de México. El objetivo es analizar cómo el liderazgo influye en la generación de innovadores modelos de negocios entre los estudiantes. Se emplea una metodología mixta que combina encuestas y entrevistas con estudiantes y profesores, así como análisis documental. Los resultados revelan que el liderazgo influye positivamente en la motivación y capacidad de los estudiantes para proponer y desarrollar modelos de negocios creativos. Además, se identifican características de liderazgo como la inspiración, el apoyo y la mentoría como elementos clave para fomentar la innovación empresarial entre los estudiantes. Estos hallazgos subrayan la importancia de cultivar un entorno de liderazgo que fomente la creatividad y el espíritu emprendedor en la comunidad estudiantil, promoviendo así la generación de nuevos modelos de negocios con impacto positivo en la economía local y más allá