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Introducción: La pandemia no se detiene, los estudios sobre la misma tampoco; esta pandemia produce dolor, tristeza, desesperación y muertes, cuyos números son incalculables. Ante esta situación difícil y dolorosa, la risa levanta su bandera de esperanza. Objetivo: El estudio tiene el objetivo de describir los niveles y los factores demográficos de la risa, en el contexto la COVID-19. Métodos: El estudio corresponde a un enfoque cuantitativo, de tipo descriptivo, de corte transversal. Los datos sobre los niveles de la risa se obtuvieron mediante una encuesta virtual, cuyos participantes fueron 101, de edades entre 20 y 60 años, quienes participaron voluntariamente, procedentes de las tres regiones del Perú: costa, sierra y selva. Los datos sobre la experiencia de la risa, con misma encuesta, con el tipo Likert: nunca, a veces y siempre. Resultados: De los 101 participantes, 87 (entre 20 y 60 años) presentan una risa en el nivel alto y 14 en el nivel medio. 14 participantes (entre solteros, casados, divorciados y convivientes) revelan una risa en el nivel medio y 87 en el nivel alto. De las tres regiones (costa, sierra y selva), 14 participantes se ubican en el nivel medio y 87 en el nivel alto. Por otro lado, 6 hombres y 8 mujeres practican una risa ubicada en el nivel medio, en el alto 28 y 59, respectivamente. En el factor: religión, 14 (entre católicos, adventistas, evangélicos y otros) revelan una sonrisa en el nivel medio, 87 en el alto. Según el factor: nivel de estudios (primario, secundario y superior), 14 y 87 ubican su risa en el nivel bajo y alto, respectivamente. En el círculo familiar y de los amigos, se experimenta siempre la risa: 58.4% y 66.3%, respectivamente; para los encuestados es más fácil reír, siempre, 54.5% y 66.3%, en el entorno familiar y de los amigos, respectivamente. Declararon que la risa previene las enfermedades, fortalece la salud, evita el covid-19, fortalece el sistema inmunológico y limita la producción de la hormona cortisol (responsable del estrés), siempre 70.3%, 31.7%, 81.2; 31.7%, 71.3% y 83.2%, respectivamente. Conclusión: En el contexto de la COVID-19, los niveles más significativos de la risa encontrados en el estudio son dos: medio y alto; los factores demográficos más ponderados son: edad, sexo, religión y estado laboral.

Introduction: The pandemic does not stop, neither does the studies on it; This pandemic produces pain, sadness, despair and deaths, the numbers of which are incalculable. Faced with this difficult and painful situation, laughter raises its flag of hope. Objective: The study aims to describe the levels and demographic factors of laughter, in the context of COVID-19. Methods: The study corresponds to a quantitative, descriptive, cross-sectional approach. The data were obtained through a virtual survey, whose participants were 101, from the three regions. Results: Of the 101 participants, 87 (between 20 and 60 years old) are located in the high level and 14 in the medium level. Similarly, 14 (among single, married, divorced and cohabitants) in the medium level and 87 in the high level. Of the three regions (coast, mountains and jungle), 14 in the medium level and 87 in the high level. On the other hand, 6 men and 8 women are in the medium level, in the high 28 and 59, respectively. In the factor: religion, 14 (among Catholics, Adventists, Evangelicals and others) in the medium level, 87 in the high. According to the factor: educational level (primary, secondary and higher), 14 and 87 are located in the low and high level, respectively. In the family and friends circle, laughter is always experienced: 58.4% and 66.3%, respectively; for respondents it is easier to laugh, always, 54.5% and 66.3%, in the family environment and with friends, respectively. They declared that laughter prevents diseases, strengthens health, prevents covid-19, strengthens the immune system and limits the production of the hormone cortisol (responsible for stress), always 70.3%, 31.7%, 81.2; 31.7%, 71.3% and 83.2%, respectively. Conclusion: In the context of COVID-19, the most significant levels of laughter found in the study are two: medium and high; the most weighted demographic factors are: age, sex, religion, and employment status.

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The prevalence of disease-driven mass mortality events is increasing, but our understanding of spatial variation in their magnitude, timing and triggers are often poorly resolved. Here, we use a novel range-wide dataset comprised 48 810 surveys to quantify how sea star wasting disease affected Pycnopodia helianthoides, the sunflower sea star, across its range from Baja California, Mexico to the Aleutian Islands, USA. We found that the outbreak occurred more rapidly, killed a greater percentage of the population and left fewer survivors in the southern half of the species's range. Pycnopodia now appears to be functionally extinct (greater than 99.2% declines) from Baja California, Mexico to Cape Flattery, Washington, USA and exhibited severe declines (greater than 87.8%) from the Salish Sea to the Gulf of Alaska. The importance of temperature in predicting Pycnopodia distribution rose more than fourfold after the outbreak, suggesting latitudinal variation in outbreak severity may stem from an interaction between disease severity and warmer waters. We found no evidence of population recovery in the years since the outbreak. Natural recovery in the southern half of the range is unlikely over the short term. Thus, assisted recovery will probably be required to restore the functional role of this predator on ecologically relevant time scales.

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Perfluorodecanoic acid (PFDA) is a synthetic perfluorinated compound, which has been reported to exert adverse effects on somatic cells. However, its effects on germ cells have not been studied to date. The aim of the present study was to analyze the effects of PFDA on the viability, intracellular calcium levels and gap junction intercellular communication (GJIC) during porcine oocyte maturation in vitro. PFDA negatively impacted oocyte viability (medium lethal concentration, LC50 = 7.8 µM) and maturation (medium inhibition of maturation, IM50 = 3.8 µM). Oocytes exposed to 3.8 µM PFDA showed higher levels of intracellular calcium relative to control oocytes. In addition, GJIC among the cumulus cells and the oocyte was disrupted. The effects of PFDA on oocyte calcium homeostasis and intercellular communication seem to be responsible for the inhibition of oocyte maturation and oocyte death. In addition, since the deleterious effects of PFDA on oocyte viability, maturation and GJIC are significantly stronger than the previously reported effects of another widely used perfluorinated compound (Perfluorooctane sulfonate) in the same model, the use of PFDA in consumer products is questioned.

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Se evaluó la efectividad e inocuidad de sulglicotide a la dosis de 200 mg tres veces al día durante 6 semanas en 62 pacientes con gastritis y duodenitis no lucerosa. Las evaluaciones fueron realizadas mediante examen clínico, endoscopia y opinión por parte del médico. A la sexta semana el tratamiento produjo una disminución significativa de los escores iniciales de todos los síntomas evaluados, así como en los escores endoscópicos. Los efectos adversos observados fueron: náuseas, resequedad, mal sabor y olor en la boca, cefalea, erupciones de la piel, mareos y sensación de hambre

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We studied prospectively 44 patients with diffuse liver disease. We performed percutaneous liver biopsy in these outpatients. They were required to be in absolute response during the following 4-6 hours after the biopsy was completed. After that period, they could go home and have a relative rest for the remnant day. These patients were followed by clinical evaluation and by real time abdominal ultrasound. We found some complications: Transitory arterial hypotension, pain in the site of puncture, hepatic hematomas. Only one of the patients with hematomas required hospitalization during 24 hours. The mortality was 0%. According to our experience, the hepatic biopsy is a procedure that can be performed in outpatients with a wide margin of security. An important point of view to consider is the economic advantage since it means a decrease in costs by each hepatic biopsy accomplished considering the cost/day of hospitalization.

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We reviewed 9210 upper gastrointestinal endoscopic examinations during a 66 month period and found 23 (0.24%) diagnosis of Barrett's Esophagus (BE). Male/female ratio was 1.3:1. Age was 23-79 year old (y/o) mean 50.60 y/o. Histological diagnosis was confirmed in 23/35 cases and cardiac type was present on 60.86%, intestinal type in 39.10%. Dysplasia was not found. Endoscopic mucosal lesions were: finger-like projections 13/23 (56.52%), ulcers in five cases (21.73%), islands of columnar epithelium and circumferential extension in 2 each (8.69%), and stenosis in one (4.34%). The low frequency in this series could be attributed to a retrospective analysis. The high risk for developing adenocarcinoma of the esophagus justifies prospectives trials in our country to verify the prevalence.

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En Chile la historia del desarrollo de la atencion primaria es fundamentalmente la del consultorio urbano. A este respecto es sorprendente observar como la Declaracion de Alma Ata especifica la Atencion Primaria de Salud en terminos que coinciden total y absolutamente con el modelo y funcion del Consultorio Periferico Urbano desarrollado en Chile desde 1952 por el SNS y con especial enfasis a partir de la decada del 60. De este modo, puede verse un fenomeno de anticipacion historica en Chile dentro del devenir de la salud mundial orientada por la OMS. Esta anticipacion esta siendo evaluada por los autores del presente trabajo

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