Rentabilidad y decisiones de inversión

El análisis económico de empresas e inversiones, utiliza habitualmente ratios y relaciones diversas. No obstante, la medición adecuada de la rentabilidad de inversiones cualquiera sea su naturaleza u oportunidad en el ciclo empresario, debiera surgir de una metodología de absoluta integración de los aspectos involucrados en una decisión de inversión y sustentada en un criterio económico de análisis beneficio/costo: la evaluación económico financiera de proyectos. Este instrumento de decisión, genera indicadores que comparan flujos de utilidad con stock de inversión en unidades monetarias, tasa, porcentajes y también en tiempo necesario para recuperar una inversión. Sin embargo, los criterios de evaluación solo miden la rentabilidad de uno de los tantos escenarios futuros, sin considerar posibles cambios en el comportamiento de variables propias y del entorno. Esta limitación se supera utilizando dos enfoques complementarios: análisis de riesgo y sensibilización de variables.Fil: Jardel, Eduardo. Universidad Nacional de Cuyo. Facultad de Ciencias EconómicasFil: García Ojeda, Juan Carlos. Universidad Nacional de Cuyo. Facultad de Ciencias Económica

Climatic diversity and ecological descriptors of wild tomato species (Solanum sect. lycopersicon) and close related species (solanum sect. juglandifolia y sect. lycopersicoides) in Latin America

Conservation and sustainable use of species diversity require a description of the environment where they develop. The objectives were to determine ecological descriptors and climatic diversity of areas along the distribution range of 12 species of wild tomatoes (Solanum sect. Lycopersicon) and four wild species of phylogenetically related groups (Solanum sect. Juglandifolia and sect. Lycopersicoides), as well as their ecological similarity in Latin America. With 4228 selected tomato accessions and an environmental information system (EIS) composed of 21 climatic variables, diversity patterns of the distribution areas were identified for each species, as well as ecological descriptors through the use of geographic information systems (GIS). The contribution of climatic variables to the species geographical distribution was identified by principal component analysis (PCA), and similarity in species distribution as a function of the variables identified with cluster analysis (CA). Climatic characteristics and the environmental amplitude of wild tomatoes and related species along their distributional range were satisfactorily determined by ecological descriptors. Eleven climate types were identified, predominantly BSk (arid, steppe, cold), BWh (arid, desert, hot), and Cfb (temperate, no dry season, warm summer). PCA determined 10 most important variables were the most important for the geographical distribution. Six groups of species were identified according to CA and climatic distribution similarity. This approach has shown promissory applications for biodiversity conservation of valuable genetic resources for tomato crop breeding.Fil: Ramírez Ojeda, Gabriela. Universidad Autónoma de Chapingo; MéxicoFil: Peralta, Iris Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Rodríguez Guzmán, Eduardo. Universidad de Guadalajara; MéxicoFil: Chávez Servia, José Luis. Instituto Politécnico Nacional; MéxicoFil: Sahagún Castellanos, Jaime. Universidad Autónoma de Chapingo; MéxicoFil: Rodríguez Pérez, Juan Enrique. Universidad Autónoma de Chapingo; Méxic

Sustainability assessment of water coast systems through bird monitoring and water quality indicators. Case study: Juan Angola Channel - Cartagena, Colombia

The impact caused by contamination, urbanism, and population growth in the water bodies in the north of Colombia has had a direct affectation on ecosystem sustainability. Two samplings were taken from Juan Angola Channel in the 2021 rainy season and the 2022 dry season in four sampling stations. This study evaluated the water quality of the Juan Angola channel using physicochemical parameters and birds as bioindicators. Bird biocounting was carried out to determine alpha, beta, and gamma diversity and the measurement of physicochemical parameters for the sampling stations. The research results showed notable changes in the alpha, beta, and gamma indices, where the diversity in the different channel sectors depends on instantaneous conditions, and indexes. The physicochemical parameters showed better results in the second sampling. However, in both samplings, there was ecosystem overexposure caused by anthropic factors, airport activities, environmental conditions degradation, and sewage pouring

Assessment of Subclinical Psychotic Symptoms in Patients with Rheumatoid Arthritis and Spondyloarthritis

Inflammatory and autoimmune processes have been associated with the onset of depressive and psychotic symptoms. Rheumatoid arthritis (RA) and spondyloarthritis (SpA) are rheumatic diseases with an inflammatory etiology. A high prevalence of depressive and anxiety-related comorbidity has been reported for both diseases, with no evidence of a greater prevalence of psychosis. The objective of the present study was to evaluate for the first time subclinical psychotic symptoms in patients with RA and SpA. This is a cross-sectional, single-center study including RA and SpA patients, as well as healthy controls. Abnormal psychotic experiences (positive, negative, and depressive symptoms) were evaluated using the Community Assessment of Psychic Experiences (CAPE-42). Functional capacity was evaluated using the Short-Form Health Survey SF-12. We compared the CAPE and SF-12 scores between the three groups. We recruited 385 individuals: 218 with RA, 100 with SpA, and 67 healthy controls. According to the CAPE scale, the frequency of subclinical psychotic symptoms was greater in patients than in healthy controls (RA, 1.90 vs. 1.63, p < 0.001; SpA, 1.88 vs. 1.63, p = 0.001). Distress was also greater in patients than in controls owing to the presence of symptoms. No differences were observed between the three groups for the mental dimension scores in the SF-12 Health Survey (43.75 in RA, 45.54 in SpA, and 43.19 in healthy controls). Our findings point to a greater prevalence of subclinical psychotic symptoms in patients with RA and patients with SpA than in the general population. The results suggest an association between inflammation and depression/subclinical psychotic symptoms

Burbujas en precios de activos financieros: existencia, persistencia y migración

En este trabajo también se examina la hipótesis de migración de burbujas entre diferentes mercados de activos dentro de un mismo país. Posterior a la introducción, en la sección I se presenta una breve revisión de literatura relacionada. En la siguiente se explican los modelos teóricos de base, las metodologías de detección y las pruebas de migración de burbujas. La sección III consta de una descripción de los datos utilizados en este trabajo. En la IV se describen los resultados país por país. Finalmente, se presentan algunos comentarios a manera de conclusión

Analytical applications of single particle inductively coupled plasma mass spectrometry: a comprehensive and critical review

Single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) refers to the use of ICP-MS as a particle counting technique. When ICP-MS measurements are performed at very high data acquisition frequencies, information about (nano)particles containing specific elements and their dissolved forms can be obtained (element mass per particle, size and number and mass concentrations). As a result of its outstanding performance, SP-ICP-MS has become a relevant technique for the analysis of complex samples containing inorganic nanoparticles. This review discusses the maturity level achieved by the technique through the methods developed for the detection, characterisation and quantification of engineered and natural (nano)particles. The application of these methods in different analytical scenarios is comprehensively reviewed and critically discussed, with special attention to their current technical and metrological limitations. The emergent applications of SP-ICP-MS in the field of nanoparticle-tagged immunoassay and hybridization methods are also reviewed

Subjective well-being, happiness, and environmental health factors related to women planning a pregnancy or pregnant, using mobile health intervention

Objectives: To compare the environmental health results in women trying to get pregnant or pregnant using a mobile health application (Green Page) through healthcare professionals or self-completed by women, and to explore the relationship between the subjective well-being of these women with their lifestyles and environmental factors. Methods: A descriptive study with mixed methods was conducted in 2018. A mobile health survey was used in two phases. Phase 1 was a cross-sectional study through professionals (n = 1100) followed by phase 2, a convenience sampling through women's self-reporting (n = 3425). A personalized report was downloadable with health recommendations for the well-being of the mother and child. Results: Of the 3205 participants (mean age = 33 years, SD = 0.2 years), 1840 were planning a pregnancy and 1365 were pregnant. One in five pregnant women had a low level of happiness. Globally, subjective well-being and happiness were found to be negatively associated with lack of contact with nature, sedentary lifestyle, excess weight, environmental exposure, and older age in pregnancy. Precisely 45%, 60%, and 14% of women were exposed to tobacco, alcohol, and illegal drugs, respectively. The women self-reported levels of risk factors higher than when the tool was used by or through professionals. Conclusions: The use of mobile health interventions focused on environmental health during planning or pregnancy periods could help improve the quality of healthcare and foster greater involvement of women in their self-care process, thus promoting empowerment, healthier environments, and lifestyles. Ensuring equity of access and data protection are global challenges to be addressed.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Foundation for Formation and Research (FFIS) from Murcia's Drug Commissioner Office (Ecosistema Saludable, Neurodesallorro Saludable), the National Plan on Drugs, Ministry of Health, Spain (ID8437); the Mount Sinai International Exchange Program for Minority Student (Grant MD001452) from the National Center on Minority Health and Health Disparities of the U.S. National Institutes of Health; and the Sociedad de Pediatría del Sureste de España and its contribution to the project “Profile of childhood and adolescence environmental health in the region of Murcia” (FFIS-DF-2022-36). EOP is supported by a postdoctoral contract from the Instituto Murciano de Investigaciones Biosanitarias Virgen de la Arrixaca (IMIB-Arrixaca, Murcia, Spain).S

Edaphoclimatic descriptors of wild tomato species (Solanum Sect. Lycopersicon) and closely related species (Solanum Sect. Juglandifolia and Sect. Lycopersicoides) in South America

Wild species related to cultivated tomato are essential genetic resources in breeding programs focused on food security to face future challenges. The ecogeographic analysis allows identifying the species adaptive ranges and most relevant environmental variables explaining their patterns of actual distribution. The objective of this research was to identify the diversity, ecological descriptors, and statistical relationship of 35 edaphoclimatic variables (20 climatic, 1 geographic and 14 edaphic variables) from 4,649 accessions of 12 wild tomato species and 4 closely related species classified in Solanum sect. Lycopersicon and clustered into four phylogenetic groups, namely “Lycopersicon group” (S. pimpinellifolium, S. cheesmaniae, and S. galapagense), “Arcanum group” (S. arcanum, S. chmielewskii, and S. neorickii), “Eriopersicon group” (S. habrochaites, S. huaylasense, S. corneliomulleri, S. peruvianum, and S. chilense), “Neolycopersicon group” (S. pennellii); and two phylogenetically related groups in Solanum sect. Juglandifolia (S. juglandifolium and S. ochranthum), and section Lycopersicoides (S. lycopersicoides and S. sitiens). The relationship between the climate and edaphic variables were determined by the canonical correlation analysis, reaching 89.2% of variation with the first three canonical correlations. The most significant climatic variables were related to humidity (annual evapotranspiration, annual precipitation, and precipitation of driest month) and physicochemical soil characteristics (bulk density, pH, and base saturation percentage). In all groups, ecological descriptors and diversity patterns were consistent with previous reports. Regarding edaphoclimatic diversity, 12 climate types and 17 soil units were identified among all species. This approach has promissory applications for biodiversity conservation and uses valuable genetic resources related to a leading crop.Fil: Ramírez Ojeda, Gabriela. Universidad Autónoma Chapingo; MéxicoFil: Peralta, Iris Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; ArgentinaFil: Rodríguez Guzmán, Eduardo. Universidad de Guadalajara; MéxicoFil: Sahagún Castellanos, Jaime. Universidad Autónoma de Chapingo; MéxicoFil: Chávez Servia, José Luis. Instituto Nacional Politécnico; MéxicoFil: Medina Hinostroza, Tulio Cecilio. Gobierno del Perú. Ministerio del Ambiente; PerúFil: Rijalba Vela, Jorge Rodrigo. Universidad Pedro Ruiz Gallo; PerúFil: Vásquez Núñez, Leopoldo Pompeyo. Univeridad Pedro Ruiz Gallo; PerúFil: Rodríguez Pérez, Juan Enrique. Universidad Autónoma de Chapingo; Méxic

Reparación artroscópica con anclaje capsular en pacientes con lesiones periféricas del complejo del fibrocartílago triangular: evolución funcional a seis meses

Introduction: Injuries to the triangular fibrocartilage complex (TFCC) are a frequent diagnosis in the practice of hand surgery. Standardized treatment depends on the level of involvement of the distal radio-ulnar ligaments (RCD) in the wrist.Objectives: To describe the functional results of arthroscopic repair with capsular anchorage in patients with peripheral injuries to the TFCC and their postoperative evolution at 6 months followup.Material and methods: Patients were included in a retrospective cohort, with a diagnosis of peripheral injury to the TFCC, treated by capsular anchorage, with a 6-month follow-up. The patients were evaluated from March 2018 to December 2020, using QuickDASH and the Mayo Wrist Score, before the surgical procedure, and at 3 and 6 months after surgery.Results: The mean time to injury in our patients was 11 weeks (range 4-24 weeks). Average time of physical therapy was of 4 weeks (range 3-6 weeks), with authorization to return to sports activity at 3 weeks. There were 4 complications, of which 1 did not improve, 2 patients had resolved transient ulnar paresthesia, and 1 resolved superficial soft tissue infection.Conclusion: The capsular anchoring technique developed in the study is reproducible with satisfactory results, using scales such as the QuickDASH and the Mayo Wrist Score.Introducción. Las lesiones del complejo del fibrocartílago triangular (CFCT) son una causa frecuente de consulta por cirugía de la mano debido al dolor cubital que ocasionan. Estas lesiones son tratadas de formas estandarizadas dependiendo del nivel de afección de los ligamentos radiocubitales distales (RCD) en la muñeca. Objetivo. Describir los resultados funcionales de la reparación artroscópica con anclaje capsular en pacientes con lesiones periféricas del CFCT y su evolución postquirúrgica a seis meses. Materiales y métodos. Estudio de cohorte retrospectivo realizado entre marzo del 2018 y diciembre del 2020 y en el que se incluyeron 32 pacientes con diagnóstico de lesión periférica del CFCT que hubieran sido tratados mediante anclaje capsular y tuvieran un seguimiento de seis meses. El estado de los participantes se midió antes del procedimiento quirúrgico y a los tres y seis meses postquirúrgicos con las herramientas QuickDASH y Mayo Wrist Score. Resultados. El tiempo promedio de lesión en los pacientes analizados fue de 11 semanas (rango de cuatro a 24 semanas), y el tiempo promedio de terapia de rehabilitación fue de cuatro semanas (rango de tres a seis semanas), con autorización a la reincorporación a actividad deportiva a las tres semanas. Se presentaron cuatro complicaciones: un paciente no tuvo mejoría, dos pacientes presentaron parestesias cubitales transitorias resueltas y el otro paciente presentó una infección de tejidos blandos superficial que también fue resuelta. Conclusión. La técnica de anclaje capsular empleada en el presente estudio es reproducible, pues según las escalas QuickDASH y Mayo Wrist Score los pacientes intervenidos tuvieron resultados satisfactorios