Effect of bentonite fining on polyfunctional mercaptans and other volatile compounds in Sauvignon blanc wines

Bentonite fining is the most common process used in the wine industry to remove proteins from wine. Herein, the influence of fermentative and post-fermentative fining on aroma compounds found in Sauvignon blanc wines was studied. Sauvignon blanc musts from different vintages were fined using bentonite. Conventional enological parameters, together with more than 60 volatile compounds, including varietal thiols, were determined in the bottled wines. The results showed that bentonite fining was more effective in removing proteins from wine when carried out on finished wines. Several volatile compounds were influenced by bentonite fining depending on the tim­ing of addition and the vintage. Varietal thiols, key compounds of Sauvignon blanc wine aroma, were significantly reduced when the wines were fined with bentonite, particularly when fining took place during fermentation. Results suggest that bentonite fining of musts could damage the organoleptic quality and varietal character of Sauvignon blanc wines because of its impact on polyfunctional mercaptans

Positivism on the move: translators and publishers in Mexico and Argentina from 1850 to 1950

Historians have demonstrated that Auguste Comte‟s philosophy became an eclectic positivism after its introduction to Latin America. The factors that help explain this eclecticism include positivism's connections with the writings of Herbert Spencer, Charles Darwin, and John Stuart Mill; the simultaneous circulation of print materials in their original language as well as their translations; and the emergence of an international publishing market in the late 19th century. This paper studies the flow of positivist ideas in Mexico and Argentina from the perspective of publishers and translators during a period when states were organizing their fundamental structures and education policies (1850–1950).La historiografía sobre el tema ha mostrado que la introducción de la filosofía de Auguste Comte en Latinoamérica dio lugar a un positivismo profundamente heterogéneo. Su combinación con los escritos de Herbert Spencer, Charles Darwin y John Stuart Mill, la circulación de impresos, tanto en lengua original como en traducción, y el desarrollo de un mercado editorial internacional a fines del siglo XIX son algunos de los factores que contribuyen a explicar dicha heterogeneidad. El presente trabajo estudia la circulación de las ideas positivistas en Argentina y en México desde la perspectiva de los editores y traductores activos entre 1850 y 1950, un periodo clave para la organización política de los nuevos Estados latinoamericanos y para la constitución de sus instituciones educativas.This article is the English version of “La circulación de las ideas positivistas en Argentina y en México: editores y traductores (1850–1950)” by Nayelli Castro & Clara Foz. It was not published on the print version of MonTI for reasons of space. The online version of MonTI does not suffer from these limitations, and this is our way of promoting plurilingualism

La circulación de las ideas positivistas en Argentina y en México: editores y traductores (1850-1950)

This article is the English version of “La circulación de las ideas positivistas en Argentina y en México: editores y traductores (1850–1950)” by Nayelli Castro & Clara Foz. It was not published on the print version of MonTI for reasons of space. The online version of MonTI does not suffer from these limitations, and this is our way of promoting plurilingualism.Historians have demonstrated that Auguste Comte‟s philosophy became an eclectic positivism after its introduction to Latin America. The factors that help explain this eclecticism include positivism's connections with the writings of Herbert Spencer, Charles Darwin, and John Stuart Mill; the simultaneous circulation of print materials in their original language as well as their translations; and the emergence of an international publishing market in the late 19th century. This paper studies the flow of positivist ideas in Mexico and Argentina from the perspective of publishers and translators during a period when states were organizing their fundamental structures and education policies (1850–1950).La historiografía sobre el tema ha mostrado que la introducción de la filosofía de Auguste Comte en Latinoamérica dio lugar a un positivismo profundamente heterogéneo. Su combinación con los escritos de Herbert Spencer, Charles Darwin y John Stuart Mill, la circulación de impresos, tanto en lengua original como en traducción, y el desarrollo de un mercado editorial internacional a fines del siglo XIX son algunos de los factores que contribuyen a explicar dicha heterogeneidad. El presente trabajo estudia la circulación de las ideas positivistas en Argentina y en México desde la perspectiva de los editores y traductores activos entre 1850 y 1950, un periodo clave para la organización política de los nuevos Estados latinoamericanos y para la constitución de sus instituciones educativas

The effect of oxygen pickup during selective laser melting on the microstructure and mechanical properties of Ti–6Al–4V lattices

Additive manufacturing techniques such as Selective Laser Melting (SLM) can produce complex shapes with relatively thin sections and fine detail. However, common materials for the process, such as Ti–6Al–4V, have microstructure and properties that are sensitive to the pickup of interstitial impurities, such as oxygen, which the material will be exposed to during the process. This problem would be especially severe for parts with thin sections, where surface effects can be more significant, and where poor properties may coincide with locally-elevated stress. Here we explore the effects of oxygen level in thin sections with the use of lattice materials (materials which can be considered to consist exclusively of near-surface material). Oxygen levels are artificially raised using repeated melting passes to result in more pickup, leading to significantly reduced ductility and hence reduced strength measured in compression. A ductile to brittle transition in strut failure mechanism is found with increasing number of melting passes, with significant modification in chemistry and crystallographic structure, despite the presence of a similar fine plate-like microstructure throughout

Fluorescent in vivo imaging of reactive oxygen species and redox potential in plants

Reactive oxygen species (ROS) are by-products of aerobic metabolism, and excessive production can result in oxidative stress and cell damage. In addition, ROS function as cellular messengers, working as redox regulators in a multitude of biological processes. Understanding ROS signalling and stress responses requires methods for precise imaging and quantification to monitor local, subcellular and global ROS dynamics with high selectivity, sensitivity and spatiotemporal resolution. In this review, we summarize the present knowledge for in vivo plant ROS imaging and detection, using both chemical probes and fluorescent protein-based biosensors. Certain characteristics of plant tissues, for example high background autofluorescence in photosynthetic organs and the multitude of endogenous antioxidants, can interfere with ROS and redox potential detection, making imaging extra challenging. Novel methods and techniques to measure in vivo plant ROS and redox changes with better selectivity, accuracy, and spatiotemporal resolution are therefore desirable to fully acknowledge the remarkably complex plant ROS signalling networksThis work was funded by a grant from the Spanish Ministry of Economy and Competitiveness ( AGL2014–53771-R ). Alfonso Blázquez-Castro acknowledges funding under the Marie Skłodowska-Curie Action COFUND 2015 (EU project 713366 – InterTalentum

Los conflictos socioambientales y la construcción de alternativas: experiencias de agricultura periurbana en el sur de la zona metropolitana de Guadalajara, Jalisco, México

El crecimiento desordenado de la zona metropolitana de Guadalajara, Jalisco, México, ha ocasionado una serie de conflictos socioambientales que impactan los recursos naturales y la calidad de vida de los habitantes del entorno periurbano. Ante ello, diversos actores locales se han orientado a construir alternativas a estos conflictos y allí es crucial el papel de la agricultura familiar periurbana, sustentable y multifuncional. En este trabajo se da cuenta de la experiencia del Instituto Tecnológico y de Estudios Superiores de Occidente, que lleva a cabo en la región un proyecto de acompañamiento e investigación participativa, donde se ha formado a los agricultores locales en la transición hacia agriculturas más sustentables, con el que se han demostrado las experiencias de agricultura periurbana, su viabilidad y sus aportaciones a la sustentabilidad regional, y se ha favorecido la articulación de los actores locales con organizaciones regionales y nacionales. Estos procesos se realizan en un tejido social fuerte que es la base para la construcción de alternativas a los conflictos socioambientales. The disordered sprawl of Guadalajara, Jalisco, Mexico has caused a number of environmental conflicts that impact the environment and quality of life of the residents of the suburban surroundings. In response, diverse local actors have focused on building alternatives to these conflicts where it is crucial the role of peri-urban, sustainable and multifunctional family agriculture. The Western Institute of Technology and Higher Education, holds in the region a project of accompaniment and participatory research, which has qualified local farmers in the transition to more sustainable agriculture and demonstrate the feasibility of the experiences of periurban agriculture and their contributions to regional sustainability, finally it has favored the articulation of local regional and national actors. These processes get done inside a strong social network which is the base to the construction of alternatives to socioenvironmental conflicts

Los conflictos socioambientales y la construcción de alternativas: experiencias de agricultura periurbana en el sur de la zona metropolitana de Guadalajara, Jalisco, México

El crecimiento desordenado de la zona metropolitana de Guadalajara, Jalisco, México, ha ocasionado una serie de conflictos socioambientales que impactan los recursos naturales y la calidad de vida de los habitantes del entorno periurbano. Ante ello, diversos actores locales se han orientado a construir alternativas a estos conflictos y allí es crucial el papel de la agricultura familiar periurbana, sustentable y multifuncional. En este trabajo se da cuenta de la experiencia del Instituto Tecnológico y de Estudios Superiores de Occidente, que lleva a cabo en la región un proyecto de acompañamiento e investigación participativa, donde se ha formado a los agricultores locales en la transición hacia agriculturas más sustentables, con el que se han demostrado las experiencias de agricultura periurbana, su viabilidad y sus aportaciones a la sustentabilidad regional, y se ha favorecido la articulación de los actores locales con organizaciones regionales y nacionales. Estos procesos se realizan en un tejido social fuerte que es la base para la construcción de alternativas a los conflictos socioambientales. The disordered sprawl of Guadalajara, Jalisco, Mexico has caused a number of environmental conflicts that impact the environment and quality of life of the residents of the suburban surroundings. In response, diverse local actors have focused on building alternatives to these conflicts where it is crucial the role of peri-urban, sustainable and multifunctional family agriculture. The Western Institute of Technology and Higher Education, holds in the region a project of accompaniment and participatory research, which has qualified local farmers in the transition to more sustainable agriculture and demonstrate the feasibility of the experiences of periurban agriculture and their contributions to regional sustainability, finally it has favored the articulation of local regional and national actors. These processes get done inside a strong social network which is the base to the construction of alternatives to socioenvironmental conflicts

Effects of web-based electrocardiography simulation on strategies and learning styles

Objective: To identify the association between the use of web simulation electrocardiography and the learning approaches, strategies and styles of nursing degree students. Method: A descriptive and correlational design with a one-group pretest– posttest measurement was used. The study sample included 246 students in a Basic and Advanced Cardiac Life Support nursing class of nursing degree. Results: No significant differences between genders were found in any dimension of learning styles and approaches to learning. After the introduction of web simulation electrocardiography, significant differences were found in some item scores of learning styles: theorist (p < 0.040), pragmatic (p < 0.010) and approaches to learning. Conclusion: The use of a web electrocardiogram (ECG) simulation is associated with the development of active and reflexive learning styles, improving motivation and a deep approach in nursing students