HIPERPLASIA FIBROSA INFLAMATORIA ASOCIADA A PRÓTESIS REMOVIBLE

La rehabilitación de pacientes parcial o totalmente edentulos conlleva algunos riesgos, especialmente cuando los aparatos protésicos no cumplen con el criterio de "convivir en forma armónica con las estructuras anatómicas que los rodean" de tal manera que no interfieran en el fisiologismo normal de estas estructuras y más bien contribuyan a su restitución, sin embargo un buen número de adultos mayores portadores de dentaduras artificiales presentan atrofia del proceso alveolar causada por desajuste protésico, lo que produce irritación mecánica de la mucosa que desencadena un proceso inflamatorio crónico que termina con la formación de tejido fibroso hiperplásico asintomático en las zonas de agresión, conocida como hiperplasia fibrosa inflamatoria (HIF) o también llamada epulis fissuratum, épulis fisurado, por la presencia de surcos que corresponden a las zonas de compresión del borde protésico, las que deben ser eliminadas quirúrgicamente antes de que ocasionen la atrofia completa del hueso alveolar, ya que de ocurrir ello, significaría la imposibilidad de volver a sostener otra dentadura en esa arcada (1). La mayoría de los casos han sido reportados entre la quinta y séptima década de vida, generalmente localizada en la parte anterior del maxilar superior (2). Clínicamente, el tejido hiperplásico suele formar lobulillos o pliegues y puede estar fisurado en el punto donde el reborde de la prótesis contacta con el tejido, en la base de las presiones lineales. Se localiza con mayor frecuencia en la zona anterior; son blandas, flácidas y móviles, y cuando existe ulceración, estas hiperplasias se muestran eritematosas

Estrategias de reproducción de las unidades domésticas campesinas de Jucuapa centro, Nicaragua.

In this article, we analyze reproduction strategies of PeasantDomestic Units (PDU) in the Jucuapa Centro Community,located in the Department of Matagalpa, Nicaragua, toevaluate their development viability. Peasant strategies referto mechanisms that family units practice to endure nutritionalminimums and satisfy their basic needs, and secure their survivaland social reproduction. Peasant agriculture in this communityis immersed in a process of productive recomposition, with theintroduction or extension of products like coffee, fruits, large andsmall livestock, which have allowed greater economic income.However, reorientation of agricultural activities is insufficientto guarantee the socioeconomic reproduction of the PDU, wheremembers must resort to performing activities outside the farm,which are not agricultural activities but rather complementary,whose logic is directed at obtaining the maximum economicincome and ecological potential.En este artículo se analizan las estrategias de reproducción delas Unidades Domesticas Campesinas (UDC) de la ComunidadJucuapa Centro, ubicada en el departamento de Matagalpa -Nicaragua, para evaluar su viabilidad de desarrollo. Las estrategiascampesinas hacen referencia a los mecanismos quelas unidades familiares practican para hacer frente a mínimosnutricionales y satisfacer sus necesidades básicas y asegurar lasupervivencia y reproducción social. La agricultura campesinaen esta comunidad está inmersa en un proceso de recomposiciónproductiva, con la introducción o ampliación de rubros comocafé, frutas, ganadería mayor y menor, que les han permitidomayores ingresos económicos. Sin embargo, la reorientación delas actividades agrícolas resulta insuficiente para garantizar lareproducción socioeconómica de las UDC, donde sus miembrosdeben recurrir al desempeño de actividades fuera de la finca,las que no son actividades agrícolas, sino complementarias, cuyalógica se orienta a la obtención de los máximos ingresos económicosy potencialidades ecológicas

Net carbon emissions from deforestation in Bolivia during 1990-2000 and 2000-2010: results from a carbon bookkeeping model

Accurate estimates of global carbon emissions are critical for understanding global warming. This paper estimates net carbon emissions from land use change in Bolivia during the periods 1990-2000 and 2000-2010 using a model that takes into account deforestation, forest degradation, forest regrowth, gradual carbon decomposition and accumulation, as well as heterogeneity in both above ground and below ground carbon contents at the 10 by 10 km grid level. The approach permits detailed maps of net emissions by region and type of land cover. We estimate that net CO2 emissions from land use change in Bolivia increased from about 65 million tons per year during 1990-2000 to about 93 million tons per year during 2000-2010, while CO2 emissions per capita and per unit of GDP have remained fairly stable over the sample period. If we allow for estimated biomass to increase in mature forests, net CO2 emissions drop to close to zero. Finally, we find these results are robust to alternative methods of calculating emissions

La identificación del talento en la formación profesional. Diseño y resultado de una estrategia

Taking as a point of starting the critical analysis of the used ways to identify the talent at Central University of Las Villas (UCLV), this research is oriented toward the design and implementation of a strategy to surpass the found deficiencies in this process. The Cultural-Historic approach is taken as the theoretical reference. The methodological implications derived of this position assess the novelty of the scientific proposition since the identification of talent is conceived as an analysis of learners´ educational needs centered on professional education. Asurvey of multiple cases is carried out to prove the effectiveness of this strategy. This allows from qualitative perspective to analysis the regularities and the particularities of talented performance opening the possibilities for the establishment of educational contexts focused on the development of talent

Exploratory Study to Determine the Effectiveness of Discussion Sessions as a Teaching Strategy on the Concepts of Spontaneity

An exploratory study to determine the effectiveness of discussion sessions as a teaching strategy of Thermodynamics in Basic Physical Chemistry of fundamental concepts in this area as spontaneity by explaining students according to their ideas. A previously validated questionnaire was used as an instrument on Thermochemistry, Enthalpies of Bonding, and Gibbs Function. The performance of the students who participated in the intervention was compared with that of a control group to which the afore mentioned teaching strategy was not applied. The students of the intervened group explained with a higher academic level the concept of spontaneity than those of the control group reaching the level of the development of the process of effective chemical reasoning (DECRP) of the taxonomy of Barrow and Bloom

Online Applied Problem-Based Learning to Determine the Shelf Life of an on-Site Solution of Refrigerated Drug

A problem-based online learning (PBe-L) teaching sequence was designed for calculating the shelf life (expiration date) of an on-site solution of refrigerated drug as part of activities of a Pharmaceutical Physical Chemistry course of Pharmacy major at FES Cuautitlán UNAM in Mexico. The teacher presents students the problem, a group collaborative activity is carried out to search for information in PBL cycles. Students are then shown a virtual experiment that includes experimental results. Another group collaborative activity is carried out for the search of information, for the procedural analysis of the results. Applying knowledge and understanding of the topics of chemical kinetics, temperature effect on the rate of chemical reactions and drug degradation reactions, etc., students solve the problem. Hake's factor was determined for the conceptual gain. A Likert-type satisfaction survey was conducted and compared to the results of a group that was applied to the PBL strategy in person. At the end of the sequence students achieved recognition, comprehension and application learnings and conceptual gain was high. Allowing an integration of its cognitive framework of kinetics topics

Singlet-triplet energy gaps modulation of Diindeno [1,2-b: 1’2’-g] anthracene molecular family

Nowadays there is a large interest in organic materials based on diradical polycyclic aromatic hydrocarbons (PAHs) due to their unique properties, such as narrow frontier-orbital energy gaps, strong absorption in the visible spectrum, etc. However, the inherent diradical nature make these compounds with limited chemical stability giving rise to rapid decomposition under ambient conditions thus reducing their practical use. In recent years PAH diradicals that exhibit remarkable stability have been prepared thanks to the description of efficient synthetic routes to access them. One of these remarkable cases is the diindeno [1,2-b: 1’2’-g] anthracene, named as DIAn. DIAn is constituted by antiaromatic segments together with a central pro-aromatic structure. One of the important observable properties of diradicals is the singlet-triplet energy gap, ∆EST, which is intimately connected with the diradical character. The possibility of access to the molecular structure of diradicals is very valuable since properties such as the bond-order or the bond-length alternation of the mentioned moieties reveal the diradical content. Electronic and vibrational spectroscopies are alternative sources of structural information that often compensate the absence of solid-state structures. In this communication, we expand the studies of DIAn by introducing another aspect of the modulation of the ∆EST which concerns with: i) the extension of the terminal benzenes with another fused benzene (i.e., forming terminal napthalenes) and ii) with the isomerization resulting from the fusion topology of these terminal benzenes. We will present a UV-Vis-NIR and Raman spectroscopic study of the new compounds. The variation of the spectra within molecular family will be discussed in connection with the variation of ∆EST and with the diradical character of the new molecules.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Randomized elimination and prolongation of ACE inhibitors and ARBs in coronavirus 2019 (REPLACE COVID) Trial Protocol

Severe acute respiratory syndrome coronavirus 2 (SARS- CoV- 2), the virus responsible for coronavirus disease 2019 (COVID- 19), is associated with high incidence of multiorgan dysfunction and death. Angiotensin- converting enzyme 2 (ACE2), which facilitates SARS- CoV- 2 host cell entry, may be impacted by angiotensin- converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs), two commonly used antihypertensive classes. In a multicenter, international randomized controlled trial that began enrollment on March 31, 2020, participants are randomized to continuation vs withdrawal of their long- term outpatient ACEI or ARB upon hospitalization with COVID- 19. The primary outcome is a hierarchical global rank score incorporating time to death, duration of mechanical ventilation, duration of renal replacement or vasopressor therapy, and multiorgan dysfunction severity. Approval for the study has been obtained from the Institutional Review Board of each participating institution, and all participants will provide informed consent. A data safety monitoring board has been assembled to provide independent oversight of the project.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/163400/2/jch14011_am.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/163400/1/jch14011.pd

Prevalence of smoking and incidence of initiation in the Latin American adult population: the PLATINO study

Background: the PLATINO project was launched in 2002 in order to study the prevalence of chronic obstructive pulmonary disease (COPD) in Latin America. Because smoking is the main risk factor for COPD, detailed data on it were obtained. the aim of this paper was to evaluate the prevalence of smoking and incidence of initiation among middle-aged and older adults (40 years or older). Special emphasis was given to the association between smoking and schooling.Methods: PLATINO is a multicenter study comprising five cross-sectional population-based surveys of approximately 1,000 individuals per site in São Paulo (Brazil), Santiago (Chile), Mexico City (Mexico), Montevideo (Uruguay) and Caracas (Venezuela). the outcome variable was smoking status (never, former or current). Current smokers were those who reported to smoke within the previous 30 days. Former smokers were those who reported to quit smoking more than 30 days before the survey. Using information on year of birth and age of smoking onset and quitting, a retrospective cohort analysis was carried out. Smoking prevalence at each period was defined as the number of subjects who started to smoke during the period plus those who were already smokers at the beginning of the period, divided by the total number of subjects. Incidence of smoking initiation was calculated as the number of subjects who started to smoke during the period divided by the number of non-smokers at its beginning. the independent variables included were sex, age and schooling.Results: Non-response rates ranged from 11.1% to 26.8%. the prevalence of smoking ranged from 23.9% (95% CI 21.3; 26.6) in São Paulo to 38.5% (95% CI 35.7; 41.2) in Santiago. Males and middle-aged adults were more likely to smoke in all sites. After adjustment for age, schooling was not associated with smoking. Using retrospective cohort analysis, it was possible to detect that the highest prevalence of smoking is found between 20-29 years, while the highest incidence is found between 10-19 years. Age of smoking onset tended to decline over time among females.Conclusion: the prevalence of smoking varied considerably across sites, but was lower among countries with national anti-smoking campaigns.Univ Fed Pelotas, Pelotas, BrazilUniv Republica, Montevideo, UruguayInst Nacl Enfermedades Resp, Mexico City, DF, MexicoUniversidade Federal de São Paulo, São Paulo, BrazilPontificia Univ Catolica Chile, Santiago, ChileCent Univ Venezuela, Caracas, VenezuelaUniversidade Federal de São Paulo, São Paulo, BrazilWeb of Scienc