Timescales for the development of methanogenesis and free gas layers in recently-deposited sediments of Arkona Basin (Baltic Sea)

Arkona Basin (southwestern Baltic Sea) is a seasonally-hypoxic basin characterized by the presence of free methane gas in its youngest organic-rich muddy stratum. Through the use of reactive transport models, this study tracks the development of the methane geochemistry in Arkona Basin as this muddy sediment became deposited during the last 8 kyr. Four cores are modeled each pertaining to a unique geochemical scenario according to their respective contemporary geochemical profiles. Ultimately the thickness of the muddy sediment and the flux of particulate organic carbon are crucial in determining the advent of both methanogenesis and free methane gas, the timescales over which methanogenesis takes over as a dominant reaction pathway for organic matter degradation, and the timescales required for free methane gas to form

Nutritional relationships in bitter pit-affected fruit and the feasibility of Vis-NIR models to determine calcium concentration in Fuji apples.

Fuji is among the most cultivated apples worldwide but affected by the disorder bitter pit (BP). Calcium deficiency plays an important role on fruit susceptibility to BP. The objectives of this study were to determine nutritional relationships in BP-affected fruit and to verify if Vis-NIR models can predict Ca concentration in Fuji apples. Fruit was harvested during 2018 season from two different orchards with historical high BP incidence. Seven hundred and fifty apples were stored at 0 ?C for 150 days plus 10 days at 20 ?C for BP assessments. After storage, 20 fruit with BP symptoms (BP+) and 20 healthy fruit (BP?) were assessed individually for mineral concentration. Vis-NIR evaluation involved a spectra range from 285 to 1200 nm to predict Ca concentration from ?Fuji? powder enriched Ca solutions. In each orchard, healthy apples had significantly higher Ca concentration than apples with BP. The K/Ca and Mg/Ca ratios were significantly lower in healthy fruit compared with BP? affected fruit. The relationship B/Ca proved to be significant in BP fruit. Although Ca interaction with organic substances and/or cellular structures could influence NIR spectra in fresh fruit, our results showed that Vis-NIR models could not be used to direct prediction of fruit Ca concentration

Cardiomiopatía hipertrófica: experiencia de 5 años en un centro cardiovascular

ResumenIntroducciónLa cardiomiopatía hipertrófica se define como el engrosamiento de la pared ventricular izquierda que no es explicado por condiciones anormales de la carga y que impone un riesgo de: arritmias, falla cardiaca y muerte súbita.Se pretende identificarLa prevalencia, las características clínicas y del tratamiento de los pacientes con cardiomiopatía hipertrófica atendidos en nuestra institución.Materiales y métodosSe extrajeron y analizaron los registros de pacientes con cardiomiopatías hipertróficas, definiendo las características generales y explorando las diferencias entre subgrupos, todos los contrastes estadísticos asumieron una confianza del 95%.ResultadosSe evaluaron 22 casos de la cardiomiopatía hipertrófica, el sexo femenino aportó el 40,9% del total de los casos, la edad promedio fue 54 años. El 77,27% presentaron insuficiencia mitral, el 63,64% reportaron dolor torácico, el 68,18% se encontraban en tratamiento inhibidor de renina y el 95,45% tenían betabloqueador, el grosor promedio del septum fue del 22,77mm, la prevalencia de fibrilación auricular fue del 22,7% y la de enfermedad coronaria del 18%.ConclusionesLa prevalencia de la cardiomiopatía hipertrófica en el período 2009-2013 fue del 2,35%, relacionado principalmente con la insuficiencia mitral y tenían antecedente de dolor torácico, la prevalencia de la fibrilación auricular en pacientes con cardiomiopatía hipertrófica en el presente estudio fue del 22,7% y la de enfermedad coronaria del 18%.AbstractIntroductionHypertrophic cardiomyopathy is defined as the thickening of the left ventricular wall that is not explained by abnormal loading conditions, imposing a risk for arrhythmias, heart failure and sudden death.We attempt to identify the prevalence, clinical features and treatment of patients with hypertrophic cardiomyopathy assisted within our institution.Material and methodsRecords of patients with hypertrophic cardiomyopathy were pulled and analysed, defining general features and exploring differences among subgroups; all statistical contrasts assumed a confidence of 95%.Results22 cases of hypertrophic cardiomyopathy were assessed, 40.9% of whom were female, average age was 54. 77.27% showed mitral insufficiency, 63.4% reported chest pain, 68.18% were receiving renin inhibitor therapy and 95.45% were taking beta blockers. Average septum thickness was 22.77mm, prevalence of atrial fibrillation was 22.7% and coronary disease 18%.ConclusionPrevalence of hypertrophic cardiomyopathy during the 2009-2013 period was of 2.35%, mostly related to mitral insufficiency and previous history of chest pain; prevalence of atrial fibrillation in patients with hypertrophic cardiomyopathy in our study was of 22.7%, and 28% for coronary disease

Topsoil carbon stocks in urban greenspaces of the Hague, the Netherlands

Industrial Ecolog

Propuesta Pedagógica para Fortalecer el Pensamiento Crítico en Estudiantes de Educación Superior

El propósito de la investigación: Promover el fortalecimiento del pensamiento crítico en los estudiantes de educación infantil ampliación Cúcuta. El tipo de investigación fue investigación acción participativo, la población estuvo constituida por 33 sujetos entre estudiantes y docentes. Los resultados obtenidos se lograron identificar desfases del sistema educativo y posibles cambios desde exigencia de los primeros semestres. De esta manera mejorar la planificación como una estrategia de carácter pedagógico en donde prevalezca la formación integral del educador en formación

Exploratory analysis of biodiesel by combining comprehensive two-dimensional gas chromatography and multiway principal component analysis

Comprehensive two-dimensional gas chromatography (GC×GC) was used in this work in order to reveal and identify minor compounds of several raw materials in biodiesel samples, which are not detected by conventional GC analysis. Multiway principal component analysis (MPCA) of the chromatographic profile allowed to identify compounds as C15:1n-3, C18:2n-6, C20:1n-6, C20:3n-3, C20:3n-6, C20:4n-6 C20:5n-3, C21:1n-6, C22:1n-9, C23:1n-9, C24:1n-9 multi-unsaturated which were useful tracers to discriminate between biodiesel samples. In this way, the separation power of GC×GC combined with the MPCA algorithm proved to be a valuable strategy for biodiesel samples classification, allowing identification and providing additional compounds of the commonly known as chemical profile of biodiesel samples.Comprehensive two-dimensional gas chromatography (GC×GC) was used in this work in order to reveal and identify minor compounds of several raw materials in biodiesel samples, which are not detected by conventional GC analysis. Multiway principal component285740746COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOSEM INFORMAÇÃOSEM INFORMAÇÃOSEM INFORMAÇÃOThe Brazilian Ministry of Education Agency for Improvement of Graduate Personnel (CAPES), the National Council for Scientific and Technological Development (CNPq) and the São Paulo Research Foundation (FAPESP) are gratefully acknowledged for providing fu

Estandarización y aplicación de la técnica de pcr – anidado para la detección de mycoplasma hyopneumoniae

El Mycoplasma hyopneumoniae es el agente causal de la Neumonía enzoótica porcina, una de las enfermedades más importantes en la industria porcina. En la actualidad, el proceso de diagnóstico ante-mortem es una de las principales diicultades, dadas la poca sensibilidad y especiicidad de las técnicas que se utilizan. El propósito de esta investigación fue estandarizar la técnica de Reacción en Cadena de la Polimerasa (PCR) anidada para la detección de Mycoplasma hyopneumoniae, utilizando diferentes métodos de extracción del ADN, tanto comerciales como convencionales. Para determinar la sensibilidad de la técnica se realizaron diluciones seriadas al cultivo de Mycoplasma hyopneumoniae, cepa J, mantenida en medio Friis. También se evaluaron algunas modiicaciones hechas a la mezcla de la reacción de PCR tradicional reportadas en la literatura y, una vez ajustada, la técnica fue aplicada en muestras clínicas como hisopados nasales y lavados traqueobronquiales. Los mejores resultados fueron obtenidos cuando el ADN se extrajo de la bacteria por calor y se trató con proteinasa K para luego ser utilizado en una reacción de PCR - anidado que no contenía estabilizadores de la Taq-polimerasa, como el glicerol o la seroalbúmina bovina. Bajo estas condiciones, se logró detectar M. hyopneumoniae hasta la dilución de 10-5 de un cultivo puro de la cepa J de referencia y también a partir de algunas muestras clínicas

Culinary tourism as a cultural experience. the case study of the city of Cáceres (Spain)

Texto resumen

Global regionalized characterization factors for phosphorus and nitrogen impacts on freshwater fish biodiversity

Inefficient global nutrient (i.e., phosphorus (P) and nitrogen (N)) management leads to an increase in nutrient delivery to freshwater and coastal ecosystems and induces eutrophication in these aquatic environments. This process threatens the various species inhabiting these ecosystems. In this study, we developed regionalized characterization factors (CFs) for freshwater eutrophication at 0.5 × 0.5-degree resolution, considering different fates for direct emissions to freshwater, diffuse emissions, and increased erosion due to agricultural land use. The CFs were provided for global and regional species loss of freshwater fish. CFs for global species loss were quantified by integrating global extinction probabilities. Results showed that the CFs for P and N impacts on freshwater fish are higher in densely populated regions that encompass either large lakes or the headwaters of large rivers. Focusing on nutrient-limited areas increases country-level CFs in 51.9 % of the countries for P and 49.5 % of the countries for N compared to not considering nutrient limitation. This study highlights the relevance of considering freshwater eutrophication impacts via both P and N emissions and identifying the limiting nutrient when performing life cycle impact assessments.Environmental Biolog

A comparison between global nutrient retention models for freshwater systems

Environmental Biolog