El presente artículo tuvo el objetivo de determinar si la cultura organizacional y la satisfacción laboral son predictores del desempeño laboral en bibliotecarios de la ciudad de Mérida, Yucatán, México. Participaron 193 bibliotecarios de diferentes bibliotecas universitarias y especializadas ubicadas en Mérida, 74 (38.30 %) fueron hombres y 114 (59.10 %) mujeres. Se administraron el Denison Organizational Culture Survey (Bonavia, Prado y Barberá, 2009), el Cuestionario de Satisfacción Laboral de Minnesota (Weiss et al., 1967) y la Escala de Desempeño Laboral para Bibliotecarios, propuesta en este trabajo. Los datos fueron procesados mediante el análisis de regresión múltiple (paso por paso) para la muestra global y por sexo. Los resultados mostraron que los factores de la cultura organizacional y la satisfacción laboral que predicen el desempeño son Responsabilidad/calidad; Actitud de servicio; Comunicación; Trabajo en equipo y Protección al medio ambiente.

High dilution rates have been documented as detrimental for boar spermatozoa, shortening their lifespan (Centurion et al. 2003, Biol Reprod 69: 640–646). Addition of seminal plasma (SP) to semen extenders, or selenium (Se) and vitamin E (VE) in diet of boars could increase motility of highly diluted spermatozoa (HDS). The aim of this work was to evaluate the effect of seminal plasma on sperm motility of HDS from boars feed with Se and VE. Sixteen 12 month‐old boars were designed to one of four dietary treatments: (i) control, Se 0 ppm–VE 0 IU/kg; (ii) Se 0–VE 250; (iii) Se 0.5–VE 250 and (iv) Se 0.5–VE 0. Boars were treated for 8 weeks before semen collection. Sperm rich fractions from each boar were diluted to 5 × 106 sperm/ml in PBS medium and incubated at 37°C with or without 10% SP. The measurements were done at 0, 2 or 5 h. Data were analyzed as a mixed model for a factorial design [2 (Se) × 2 (VE) × 2 (SP) × 3 (h)]. Percentage of sperm motility (PSM) increases significantly (p < 0.001) with addition of Se (81.3 ± 1.52), VE (81.0 ± 1.62) and SP (81.5 ± 1.57) vs control (73.4 ± 1.61). There was significant interaction Se × VE (p < 0.001) and Se × VE × SP (p < 0.05) in PSM. However, PSM was affected significantly by time (0 h 83.4 ± 1.92; 2 h 80.7 ± 1.92 and 5 h 67.9 ± 1.92; p < 0.001). There was significant interaction SP × Time (p < 0.05) in PSM. These results indicate that Se, VE and SP improve seminal viability. Addition of 10% of SP maintains PSM at least during 5 hours.

Introduction: information and Communication Technologies (ICTs) on the Internet have generated great benefits for society, but it has also strongly promoted behavioral addictions, such as pornography addiction. The use of pornography is not a problem, but the truth is that its abuse causes harmful effects on people’s physical and mental health. Objective: this article analyzes the use, but with special emphasis on the harm caused by abuse and addiction to pornography. Likewise, the first Mexican scale is proposed to preliminarily measure addiction to pornography. Method: reliability was evaluated through Cronbach’s Alpha and construct validity through Exploratory Factor Analysis. Results: a structure of 5 factors was detected: Emotion, Difficulties to control, Arousal (masturbation), Tolerance and Withdrawal, with a Kaisen-Meyer-Olkin value of .860 and the Bartlett sphericity test was 1015,688; gl = 325; p = .000. Discussion and conclusions: therefore, it is concluded that the EMAP (Addiction to Pornography Scale) for Mexican men and women is valid and reliable for research purposes.

El proceso de búsqueda y recuperación es un proceso articulado y retroalimentado que se inicia cuando una persona tiene un problema que requiere resolver mediante la obtención de cierta información y termina cuando resuelve dicho problema, a través de la identificación y localización de los documentos que contienen la información pertinente, logrando satisfacer su necesidad. El presente artículo tiene como objetivo elaborar un diseño metodológico sobre el proceso de búsqueda y recuperación de fuentes de información a usuarios del Centro de Documentación en Salud (CDS) del Hospital General de Zona (HGZ) No. 57. Para lograrlo se analizaron y procesaron 83 solicitudes de usuarios que hicieron uso de dicho servicio, durante el período agosto-diciembre del 2019. Los resultados obtenidos permitieron confirmar que el servicio de búsqueda y referencia es un gran apoyo para estudiantes y profesionales de la salud. El poder complementarlo con la metodología propuesta, permitió mejorar la calidad servicio en favor de sus usuarios.

The following research introduces the problem of sustainable development and how this trend has been linked to libraries. In order to illustrate this point, several studies with the idea of applying this approach in different libraries are presented, leading to the emergence of green libraries, which are libraries designed to minimize the negative impact on the environment. This should provide an overview for understanding how the idea of sustainable development has been carried out in Yucatan. To achieve this, a series of interviews with the staff of five libraries, located in Merida city are made. The results show that libraries in Yucatan still have a long way to go to achieve a sustainable development. However, they are already taking the first steps to this path.