The Uses of Herbaria in Botanical Research: A Review Based on Evidence From Argentina

Botanists, a section of the broad universe of researchers in Biology, are intensive users of herbaria. Presumably, all botanists use herbaria, with greater or lesser frequency and intensity, in the development of their research. In this article, we will try to prove this statement. For this purpose, an institutional history of Botany and herbaria in Argentina is presented. This study will also show that there are other fields of knowledge in which the herbarium has a role as an input, or data source, for research (e.g. agronomy, ethnobotany, medicine). On the other hand, it will be demonstrated that, in addition to the uses of the herbarium in basic science, this institution has a crucial role in the knowledge and preservation of biodiversity, and in the improvement of species for commercial use.Fil: Lopez, Alicia. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Sassone, Agostina Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion. Academia Nacional de Ciencias Exactas, Físicas y Naturales. Instituto de Botánica Darwinion; Argentin

Revision of Oxalis section Palmatifoliae DC. (Oxalidaceae)

A taxonomic revision of Oxalis section Palmatifoliae and cluster analyses to clarify the limits of the species are provided. This monophyletic section includes five species endemic from Southern Argentina and Chile. A key for the species together with description, illustration, synonymy, and geographical distribution for each species are given. Five lectotypifications and two new synonymies are proposed.Fil: Lopez, Alicia. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion; ArgentinaFil: Panseri, Andrea Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); ArgentinaFil: Urtubey, Estrella. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Botánica Darwinion; Argentin

Analisis del Volumen Plaquetar Medio en los pacientes con Tromboembolismo Pulmonar

El Volumen Plaquetario Medio (VPM) es un biomarcador que indica la medición geométrica del tamaño, la función y actividad plaquetaria. Varios estudios han puesto de manifiesto su utilidad como marcador de riesgo cardiovascular y en particular como indicador de gravedad clínica y factor pronostico de mortalidad en pacientes con Tromboembolismo Pulmonar (TEP). En este trabajo, hemos realizado un análisis del VPM en los pacientes que ingresan en un centro hospitalario con el diagnostico de TEP. Diseñamos un estudio descriptivo, observacional, retrospectivo y longitudinal. El estudio engloba 72 casos descritos desde el 2013 al 2019, tanto de pacientes ingresados en la UCI como en la sala de hospitalización convencional del hospital. Los resultados muestran que los pacientes supervivientes a los 30 días de su ingreso hospitalario con el diagnostico de TEP presentaron un VPM menor (9,2 fl vs 10 fl de los fallecidos) con un nivel de confianza del 93 % (p: 0,07). Sin embargo, presentaron valores similares de Dímero D, pH, PaCO2 y Lactato. No encontramos diferencias estadísticamente significativas al comparar las variables clínicas y analíticas entre los varones y las mujeres, excepto un mayor Recuento Plaquetar en las mujeres. Los pacientes que ingresaron en UCI presentaron una edad inferior, un menor Recuento Plaquetar y una menor PaCO2 que los que ingresaron en sala de hospitalización con el mismo diagnóstico. La conclusión del trabajo es que los pacientes que fallecen en los treinta días posteriores a un ingreso hospitalario por TEP tienen unos niveles superiores de VPM.The Mean Platelet Volume (MPV) is a biomarker that indicates the geometric measurement of platelet size, function, and activity. Several studies have revealed its usefulness as a marker of cardiovascular risk and, in particular, as an indicator of clinical severity and a prognostic factor for mortality in patients with pulmonary embolism (TEP). In this work, we have carried out an analysis of MPV in patients admitted to a hospital with a diagnosis of pulmonary embolism. We designed a descriptive, observational, retrospective and longitudinal study. The study includes 72 cases described from 2013 to 2019, both in patients admitted to the ICU and in the hospital’s conventional hospitalization ward. The results show that the surviving patients 30 days after their hospital admission with the diagnosis of pulmonary embolism presented a lower MPV (9.2 fl vs 10 fl) with a confidence level of 93 % (p: 0.07). However, they presented similar values of D Dimer, pH, PaCO2 and Lactate. We did not find statistically significant differences when comparing the clinical and analytical variables between men and women, except for a higher Platelet Count in women. The patients who were admitted to the ICU presented a lower age, a lower Platelet Count and a lower PaCO2 than those who were admitted to the hospitalization room with the same diagnosis. The conclusion of the study is that patients who die within thirty days after hospitalization due to pulmonary embolism have higher levels of MPV.Medicin

Dietary micronutrients intake and plasma fibrinogen levels in the general adult population.

Plasma fibrinogen predicts cardiovascular and nonvascular mortality. However, there is limited population-based evidence on the association between fibrinogen levels and dietary intakes of micronutrients possibly associated with inflammation status. Data were taken from the ENRICA study, conducted with 10,808 individuals representative of the population of Spain aged ≥ 18 years. Nutrient intake (vitamin A, carotenoids, vitamin B6, vitamin C, vitamin D, vitamin E, magnesium, selenium, zinc and iron) was estimated with a validated diet history, and plasma fibrinogen was measured under appropriate quality checks. Statistical analyses were performed with linear regression and adjusted for main confounders. The geometric means of fibrinogen (g/L) across increasing quintiles of nutrient intake were 3.22, 3.22, 3.22, 3.16, and 3.19 (p-trend = 0.030) for vitamin E; 3.23, 3.22, 3.20, 3.19, and 3.19 (p-trend = 0.047) for magnesium; and 3.24, 3.22, 3.19, 3.21, and 3.19 (p-trend = 0.050) for iron. These inverse associations were more marked in participants with abdominal obesity and aged ≥ 60 years, but lost statistical significance after adjustment for other nutrients. Although dietary intakes of vitamin E, magnesium and iron were inversely associated with fibrinogen levels, clinical implications of these findings are uncertain since these results were of very small magnitude and mostly explained by intake levels of other nutrients.This work has been funded by State Secretary of R + D + I and FEDER/FSE FIS grants (F.R.A., grant 16/609 and 19/319; E.L.G., grant 16/1512); and the JPI HDHL-SALAMANDER project (F.R.A., grant APCIN 2016-145). The funders had no role in the design, analysis or writing of this workS

Rättfärdigandet av civilt olydiga handlingar : en studie av Antifascistisk Aktions och Revolutionära Frontens arbete i Sverige

By studying various theories about civil disobedience, five requirements have been developed for civil disobedience to be considered legitimate. The purpose with this paper is to see if the two networks Anti-Fascist Action (AFA) and the Revolutionary Front (RF) lives up to these criteria and therefore are legitimate in their actions. The study is done with ideology analysis of AFA:s and RF:s own websites and material, to better understand their ideology and point of view. Choosing AFA and RF was based on the fact that they are among the largest autonomous networks in Sweden and they fight against racism, fascism and other forms of oppression. The networks manage to live up to the majority of the criteria being presented in the study, which would mean that the theories used in this paper would justify the networks’ civil disobedience. The study also concluded that there are two subjects that also could be considered as two additional criteria, but because of the scholars disagreement in these areas they are in this paper seen as only possible criteria. These two criteria include the idea of violence and the thought that civil disobedience only can be justified in a fundamentally unfair and undemocratic state. This raises interesting questions and thoughts about civil disobedience in the West and provides an insight into how some might think that civil disobedience actions are important and even necessary to improve a society - even a democratic one

Evaluación formativa, herramientas tecnológicas en el logro de aprendizajes de matemática en la Institución Educativa Nuestra Señora de Guadalupe, 2022

La presente investigación tiene como objetivo determinar la influencia de la evaluación formativa y las herramientas tecnológicas en el logro de aprendizaje de matemática. El método usado en esta investigación es el hipotético deductivo, de enfoque cuantitativo, diseño no experimental de tipo transaccional de alcance explicativo causal. La población consta de todos los estudiantes del cuarto año de secundaria de la institución educativa que cumplen los requisitos de inclusión que hacen un total de 102 estudiantes a los cuales se les aplicaron los cuestionarios para recabar información mediante la técnica de la encuesta. Con respecto a las variables independientes, evaluación formativa se consideraron cinco dimensiones y para la variable herramientas tecnológicas dos y para la variable dependiente logros de aprendizaje se consideró cuatro dimensiones. Los resultados de la prueba de hipótesis arrojan un chi cuadrado de 39,179 y un nivel de significancia de 0,000 por lo que podemos afirmar que en la institución educativa Nuestra Señora de Guadalupe la evaluación formativa y herramientas tecnológicas influyen en el logro de los aprendizajes

Temas selectos en ciencia de materiales i (pdf)

Se presentan una selección de 12 capítulos de diferentes investigadores , los temas de esta obra se encuentran relacionados con polímeros y sus compuestos, nanoestructuras metálicas y óxidos metálicos.El presente libro de investigación tiene como objetivo difundir a la comunidad estudiantil de nivel licenciatura y posgrado, principalmente, algunos temas de actualidad en el campo de Ciencia de Materiales, para motivarla e interesarla en esa área tan importante. Se espera también que el libro sea de utilidad para estudiantes de posgrado en Ciencias e Ingeniería de Materiales o áreas afines