Significados atribuidos al envejecimiento: una revisión integrativa / Meanings attributed to aging: an integrative review

OBJETIVO: Conocer y analizar aquellas publicaciones que se orientan en explorar los significados que el adulto mayor atribuye al envejecimiento y su vejez. MÉTODO: La revisión fue realizada en bases de datos; las que se consultaron fueron APS physics, EBSCO, Elsevier, Scopus y Wiley. Se incluyeron investigaciones de tipo cualitativas y mixtas, publicadas en el periodo entre 2008 a 2018. RESULTADOS: Se encontraron un total de 265 artículos, llegando a una muestra final de 12; fueron evidentes las diversas temáticas que se exploraron, siendo los significados del bienestar de la vejez los más destacados. CONCLUSIÓN: Tener una mayor comprensión de la vejez en sus diversas facetas contribuye a la creación de mejores vínculos entre el profesional de enfermería y el adulto mayor, lo que facilita otorgar cuidados de enfermería que respondan a sus necesidades particulares

OBJECTIVE: To know and analyze those publications that focus on exploring the meanings that older adults attribute to aging. METHOD: the revision was made in different Databases; those consulted were APS physics, EBSCO, Elsevier, Scopus and Wiley. Qualitative and mixed researches were included, published in the period that corresponded between 2008 to 2018.RESULTS: A total of 265 articles were found, reaching a final sample of 12, the various themes that were explored were evident, with the meanings of the well-being of old age being the most prominent. CONCLUSION: Have a greater understanding of old age in its various facets contributes to the creation of better relationships between the nurse and the elderly, facilitating to grant nursing care that responds to their particular needs

Novel DNA packaging recognition in the unusual bacteriophage N15.

Phage lambda's cosB packaging recognition site is tripartite, consisting of 3 TerS binding sites, called R sequences. TerS binding to the critical R3 site positions the TerL endonuclease for nicking cosN to generate cohesive ends. The N15 cos (cos(N15)) is closely related to cos(λ), but whereas the cosB(N15) subsite has R3, it lacks the R2 and R1 sites and the IHF binding site of cosB(λ). A bioinformatic study of N15-like phages indicates that cosB(N15) also has an accessory, remote rR2 site, which is proposed to increase packaging efficiency, like R2 and R1 of lambda. N15 plus five prophages all have the rR2 sequence, which is located in the TerS-encoding 1 gene, approximately 200 bp distal to R3. An additional set of four highly related prophages, exemplified by Monarch, has R3 sequence, but also has R2 and R1 sequences characteristic of cosB-λ. The DNA binding domain of TerS-N15 is a dimer.

Frecuencia de maloclusiones y su asociación con problemas de postura corporal en una población escolar del Estado de México / Frequency of malocclusions in association with body posture problems in a school population from the State of Mexico

Introducción. Las maloclusiones son alteraciones o desórdenes oclusales sujetos a importantes condicionantes estéticos, étnicos y culturales. Como posibles factores de riesgo han sido estudiados los factores genéticos, la influencia de la caries dental en el desarrollo de la dentición temporal o permanente, la pérdida prematura de dientes y la presencia de hábitos orales perniciosos. Sin embargo, la influencia de la postura corporal en la presencia de las maloclusiones ha sido poco estudiada. El objetivo del presente trabajo fue determinar la frecuencia de maloclusiones y su asociación con problemas de postura en una población escolar del Estado de México. Métodos. Se realizó un estudio observacional, prolectivo, transversal y descriptivo. La valoración clínica de las maloclusiones se efectuó siguiendo los criterios de Angle y de la Organización Mundial de la Salud (OMS). Para la evaluación de la actitud postural al observar la columna vertebral, se consideraron las categorías correcta e incorrecta y sus posibles alteraciones en el plano frontal y sagital. Resultados. La prevalencia de maloclusiones en esta población de estudio, según criterios de Angle, fue la clase I en 55.2%; de acuerdo con los de la OMS, la de mayor frecuencia corresponde al código 1 de anomalías discretas en 70.7%. La prevalencia de actitudes posturales incorrectas fue de 52.5%. Los resultados muestran que cuando están presentes las alteraciones posturales hay presencia de maloclusiones. Las maloclusiones, de acuerdo con la clasificación Angle y las alteraciones de postura, presentan una razón de momios (RM) 10.5 (IC 95% 7.0-18.9; p <0.0001) y las condiciones de oclusión, de acuerdo con la OMS con las alteraciones de postura, una RM 24.4 (IC 95% 9.9-65.0; p <0.0001). Conclusiones. Las maloclusiones se presentan acompañadas de problemas posturales. Ambos son frecuentes en la población infantil y se debe a que en esta etapa ocurren la mayoría de los cambios morfológicos y funcionales que pueden afectar el correcto desarrollo musculoesquelético. Por lo anterior, es en esta edad en la que se deben desarrollar programas de intervención para la obtención de una postura ideal y una oclusión funcional.

Introduction. Malocclusions are considered alterations or occlusal disorders associated with aesthetic, ethnic and cultural conditions. Malocclusions have been studied and have been related to the influence of dental caries in the development of temporal or permanent dentition and to the presence of poor oral hygiene as possible risk factors. Although there is an abundance of literature related to this topic, very few studies have demonstrated the relationship between body posture and the presence of malocclusions. The objective of the present paper was to determine the frequency of malocclusions associated with posture problems in a population of school children from the State of Mexico. Methods. An observational, prospective, cross-sectional and descriptive study was carried out. Clinical evaluation of malocclusions was performed following the Angle and WHO criteria for the evaluation of postural attitude of children considering correct and incorrect categories by observing their spinal columns and possible alterations in their frontal and sagittal planes. Results. Following the criteria of Angle, the prevalence of malocclusions in the population of the present study was class 1 in 55.2% of the subjects. According to the WHO criteria, the highest frequency corresponded to code 1 of discrete anomalies in 70.7% of the subjects. The prevalence of incorrect position was 52.5%. In our study, results show that when position alterations are present, it corresponds to the presence of malocclusions. According to the classification of Angle and posture alterations, odds ratio (OR) was 10.5 (95% CI 7.0-18.9; p <0.0001) and occlusion conditions related to the WHO with posture alterations were OR 24.4 (95% CI 9.9-65.0; p <0.0001). Conclusions. When malocclusions are shown in children of this age, they are frequently related to posture problems. This stage of life is important due to the fact that this is the period when the majority of morphological and functional changes occur. During this period of life, supervision must be given in order for the child to attain ideal posture as well as functional occlusion.

Statistical investigations into indicator bacteria concentrations in Houston metropolitan watersheds.

Bacterial pollution in the Houston metropolitan area (Texas) watersheds was studied using statistical methods to determine the Escherichia coli levels and causes of their spatial and temporal variability. Houston bayous generally exhibit elevated E. coli concentrations. The more urban watersheds had higher concentration ranges and geometric means and had more spatial variation with higher overall ranges at downstream monitoring stations. They also were less sensitive to temperature variations and more strongly influenced by rainfall events. The median flow in the more urban bayous is predominantly wastewater. Frequent rainfall in the region, combined with relatively long travel times in the bayous, results in elevated bacterial levels in the bayous. Multiple regression models using water quality parameters were more representative on the segment level and not at the watershed level and may not be useful for predictions that rely on conventional water quality measures, particularly in urban watersheds, such as those studied here. Cluster analysis for the segments resulted in two distinct clusters differentiated by their developed land-use, population density, domestic animal density, and grassy land-use.

Regeneration of roots from callus reveals stability of the developmental program for determinate root growth in Sonoran Desert Cactaceae.

In some Sonoran Desert Cactaceae the primary root has a determinate root growth: the cells of the root apical meristem undergo only a few cell division cycles and then differentiate. The determinate growth of primary roots in Cactaceae was found in plants cultivated under various growth conditions, and could not be reverted by any treatment tested. The mechanisms involved in root meristem maintenance and determinate root growth in plants remain poorly understood. In this study, we have shown that roots regenerated from the callus of two Cactaceae species, Stenocereus gummosus and Ferocactus peninsulae, have a determinate growth pattern, similar to that of the primary root. To demonstrate this, a protocol for root regeneration from callus was established. The determinate growth pattern of roots regenerated from callus suggests that the program of root development is very stable in these species. These findings will permit future analysis of the role of certain Cactaceae genes in the determinate pattern of root growth via the regeneration of transgenic roots from transformed calli.

Revisión bibliográfica y reporte de un caso clínico de un quiste epidermoide en piso de boca en el Hospital Juárez de México / Review of the literature and report of a clinical case of an epidermoid cyst of the floor of the mouth at the Juarez Hospital of Mexico city

Estas lesiones quísticas pueden ser congénitas o adquiridas; cuando son de origen congénito, son llamados quistes epiteliales y cuando son de origen adquirido, quistes de inclusión o quistes postraumáticos(1,4,9). Aunque el origen del quiste epidermoide es incierto(5,12,20), la explicación más apropiada es que se desarrollan de restos ectodérmicos enclavados durante el cierre en la línea media de las fisuras embrionarias(14). Se pueden encontrar en cualquier parte del cuerpo, se han reportado muchos casos en ovarios y testículos, siendo una entidad poco común en la cabeza y cuello(2,6) y muy raras veces se encuentran en cavidad bucal(11,12,18-20) y cuando aparecen en ésta, se encuentran con mayor frecuencia en la parte anterior del piso de boca(13,15,18). Son asintomáticos y de evolución lenta, volviéndose sintomáticos a consecuencia de un proceso infeccioso sobreagregado(6), son de tamaño y forma variable, de consistencia suave o fluctuante(13). Su tratamiento consiste en la extirpación quirúrgica total para garantizar un pronóstico favorable