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El pastoreo trashumante en el departamento de Malargüe (Mendoza, Argentina) es un modo de vida cultural basado en una doble estrategia de subsistencia tradicional y gestión ambiental de las montañas. En este artículo presentamos una aproximación a ese sistema socioecológico pastoril en el sur provincial. A partir de un trabajo etnográfico con familias puesteras ubicadas en la cuenca del Río Grande, hacemos una descripción de la trashumancia y las consecuencias de una fragmentación en la aplicación de las políticas públicas orientadas a la actividad pastoril, sumadas a las amenazas externas hacia la cría caprina. En la conclusión se resalta la urgencia científico-política de concretar un programa de investigación e intervención estatal de cara al desarrollo y la sostenibilidad del modo de vida trashumante.

Existe una amplia indagación que documenta cómo el proceso de expansión del capital ha modificado los modos de vida campesinos e indígenas a escala planetaria; sin embargo, al momento de pensar las territorialidades rurales en el horizonte de crisis neoliberal, irrumpen nudos teóricos y metodológicos que requieren una indagación política sobre la formación social abigarrada. El presente artículo se cuestiona por las condiciones teórico-políticas que rodean un trabajo etnográfico en ruralidades cuyas estructuras sociales capitalistas no han logrado desarrollarse en su totalidad y conviven con formas jurídicas y sociales de formación precapitalistas. A partir de una propuesta metodológica etnográfica que combina conceptualización teórica, análisis documental y observación participante en territorios rurales campesinos e indígenas de Malargüe (Mendoza, Argentina), se aportan aquí elementos para una noción de ‘etnografía abigarrada’ como modalidad emergente del estudio antropológico, político y sociológico del universo campesino e indígena en América Latina.

Este artículo analiza la actualización de los procesos de cercamiento y despojo llevados a cabo por el capital y su impacto sobre comunidades de pueblos originarios del departamento de Malargüe, provincia de Mendoza (Argentina), durante el período 1990-2021. Con base en fuentes documentales y en un trabajo etnográfico que recupera testimonios de la organización mapuche-pehuenche ´Malalweche´ en el sur provincial, se analizan los procesos mineros y petroleros en curso y las respuestas surgidas desde la reorganización indígena y su dimensión económico-territorial. El texto concluye que la economía local de subsistencia dedicada a la actividad caprina es el resultado de un tipo de organización política que busca fortalecer la autonomía indígena del territorio estudiado.

Studies have shown that ancient cultures used microalgae as food for centuries. Currently, scientific reports highlight the value of nutritional composition of microalgae and their ability to accumulate polyunsaturated fatty acids at certain operational conditions. These characteristics are gaining increasing interest for the aquaculture industry which is searching for cost-effective replacements for fish meal and oil because these commodities are one of the most significant operational expenses and their dependency has become a bottleneck for their sustainable development of the aquaculture industry. This review is aimed at highlighting the use of microalgae as polyunsaturated fatty acid source in aquaculture feed formulations, despite their scarce production at industrial scale. Moreover, this document includes several approaches to improve microalgae production and to increase the content of polyunsaturated fatty acids with emphasis in the accumulation of DHA, EPA, and ARA. Furthermore, the document compiles several studies which prove microalgae-based aquafeeds for marine and freshwater species. Finally, the study explores the aspects that intervene in production kinetics and improvement strategies with possibilities for upscaling and facing main challenges of using microalgae in the commercial production of aquafeeds.

The number of people suffering from mental health problems is rising, with anxiety and depression now the most commonly diagnosed psychiatric conditions. Selective serotonin reuptake inhibitors (SSRIs) are one of the most prescribed pharmaceuticals to treat these conditions, which has led to their common detection in many aquatic ecosystems. As the monoaminergic system shows a high degree of structural conservation across diverse animal phyla, a reasonable assumption is that the environmental levels of SSRIs in surface water can lead to adverse effects on fish and other aquatic wildlife. For instance, Sertraline (SER), a widely prescribed SSRI, has been shown to induce adverse effects in fish, albeit most of the reports used exposure concentrations exceeding those occurring in natural environments. Therefore, there is still a great lack of knowledge regarding SERs effects in fish species, especially during early life stages. This study describes the evaluation of developmental exposure of zebrafish (Danio rerio) to environmentally relevant concentrations of SER (from 0.01 to 10 μg/L), using a battery of key survival behaviors and further relating them with the expression of genes and neurochemical profiles of the monoaminergic system. We found that developmental exposure to SER did not affect embryo morphogenesis and growth. However, concentrations as low as 0.1 μg/L induced hypolocomotion and delayed learning. The observed behavioral impairment was associated with augmented serotonin levels rather than other neurochemicals and molecular markers, highlighting the relationship between serotonin signaling and behavior in zebrafish.

Introducción: La enfermedad renal crónica asociada a la obesidad (ERCO) es una enfermedad con aumento en la prevalencia en las últimas décadas. Se caracteriza por un exceso de desequilibrios hormonales adipocíticos (adipoquinas), desregulación del sistema de equilibrio energético y desequilibrios en la homeostasis metabólica. Propósito de la revisión: El objetivo de la revisión es delinear el papel de los diferentes mecanismos fisiopatológicos para el desarrollo de enfermedad renal funcional o anatómica en pacientes con obesidad. Buscamos reportes actualizados en donde se incluye los resultados de mejor supervivencia para los pacientes con ERCO. Recientes hallazgos: Actualmente sabemos la ERCO tiene un comportamiento pro inflamatorio crónico. La obesidad y sobrepeso se asocian alteraciones hemodinámicas, estructurales e histopatológicas en el riñón, así como alteraciones metabólicas y bioquímicas que predisponen a la enfermedad renal, aun cuando la función renal y las pruebas convencionales sean normales. Conclusiones: Clasificamos a la ERCO en Tipo 1: Obesidad y alteraciones funcionales potencialmente reversibles. Tipo 2: Obesidad y alteraciones estructurales histopatológicas potencialmente no reversibles (Incluye la Glomerulopatía asociada a obesidad y glomeruloesclerosis focal y segmentaria). Tipo 3: Obesidad en relacionada con enfermedades crónicas (Diabetes, Hipertensión, Hipertensión pulmonar. Insuficiencia Cardíaca). Tipo 4: Obesidad en el paciente con terapia sustitutiva de la función renal.

En este texto realizamos una reseña histórica de la lucha campesina e indígena a escala regional, con la intención de visibilizar una modalidad de articulación teórico-práctica: la dinámica de la educación campesina en los territorios rurales. A partir de una breve revisión del legado freireano y su posible actualización en las experiencias de la Unión de Trabajadores Rurales Sin Tierra del Movimiento Nacional Campesino Indígena-Somos Tierra (UST/MNCI-ST), sostenemos que, tanto la educación popular como la praxis de organizaciones campesinas en toda Nuestra América, constituyen un punto de interacción central en la trama de los movimientos sociales campesino y sus propuestas geopedagógicas. Concluimos resaltando elementos para una nueva agenda de extensión crítica que nazca del vínculo entre lucha campesina y la extensión universitaria.

Mezcal is a traditional iconic Mexican distilled beverage obtained from varied species of agaves. Regardless of the area of production, the process always consists of five stages: harvesting the agaves, cooking, crushing, fermentation, and distillation. It is produced in a large area of Mexican territory, a large part of which is protected by the Denomination of Origin mezcal (DOM). Over time, the word mezcal has evolved from a generic name to a more specific term used to describe the agave-distilled beverages produced in the territory protected by the DOM under the Mexican official standard NOM-070-SCFI-2016 which defined Mezcal as a “Mexican distilled alcoholic beverage, 100% from maguey or agave, obtained by distillation of fermented juices with spontaneous or cultivated microorganisms, extracted from mature heads of maguey or cooked agaves, harvested in the territory covered by the DOM.” In the last 10 years, official production has increased, from

Copyright of Runa: Archivo para las Ciencias del Hombre is the property of Runa: Archivo para las Ciencias del Hombre and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Changes in the different stages of fruit processing are becoming a differentiating factor in coffee quality. Currently, generating delays in the processing of the fruit, that is, reserve, is a practice that can modify the sensory profile of the beverage. In this study, the fruit was reserved in three stages of maturity, two temperatures (15° and 20°C) and at two timepoints (24 and 48 h), establishing its chemical composition and sensory characteristics using analytical techniques such as liquid and gas chromatography. The state of maturity 1 showed an effect on malic and quinic acids due to the interaction of temperature and reserve time, while stage of maturity 3 showed an effect on glucose and fructose. The state of maturity 2 showed an effect of the reserve time on the same compounds of states 1 and 3, in addition to the content of defective beans and sucrose. The sensory quality expressed as the total SCA (Specialty Coffee Association) score and the attributes did not show treatments effect, the reserve of the fruit under the evaluated conditions presents an effect on the descriptors of the flavor. Extending the fruit reserve time from 24 to 48 h showed an increase in the groups of flavor descriptors associated with fruit and red fruits from 33.33 to 66.66% and from 34.04 to 65.95%. This implies that the constituent parts of the fruit such as the exocarp and mesocarp interact with the bean, leading to changes in the chemical composition and the improvement of the qualitative complexity of the sensory quality. This is a consequence of the increase in the frequency of the flavor descriptors of the fruit and red fruit category. [ABSTRACT FROM AUTHOR]

Objective: Treatment Resistant Depression (TRD) is commonly defined as the lack of response to two or more antidepressants with different mechanisms of action. Up to 30% of patients diagnosed with major depressive disorder might be considered to present TRD. The objective of this study was to assess the effectiveness and tolerability of esketamine in patients diagnosed with TRD, who were referred to our program after exhausting all available treatments. A secondary objective consisted in researching the relationship between response and previous use of electroconvulsive therapy. Methods: A prospective, observational study was carried out in patients enrolled in the expanded use of esketamine in our center. They received esketamine prior to its marketing authorisation, for therapeutic purposes. Sixteen subjects were analyzed. Effectiveness was assessed with the Montgomery-Asberg depression rating scale (MADRS). Patients were followed up to 4 months after the administration. Results: Esketamine showed a rapid, robust effect in improving depressive symptoms, with no specific correlation between outcome and any demographic or clinical traits evaluated. No differences were found between patients that previously received Electroconvulsive Therapy, and those that didn’t. 10 out of 16 patients responded (＞ 50% change in baseline MADRS scores), but only five achieved remission (＜ 12 points in the global MADRS score). We provide some recommendations, based on clinical experience, to improve tolerability and adherence, and to manage adverse effects. Conclusion: Results suggest that esketamine is a safe, effective and rapid-acting option for TRD. More studies are needed to properly assess predictors of response outcome. [ABSTRACT FROM AUTHOR]

With the ever‐growing presence of silver nanoparticles in consumer products, there is a need for cost‐effective and on‐site monitoring of their influence on our environment. Herein, we report the use of screen‐printed and laser‐ablated microelectrode arrays (SPMEAs) for the electrochemical detection of 20 nm‐sized silver nanoparticles (AgNPs) via collision electrochemistry. The electrodes' morphology is optically analyzed and their electrochemical properties later characterized using cyclic voltammetry and impedance spectroscopy. The SPMEAs are calibrated using a AgNP concentration range of 1 to 100 pM, resulting in a linear dependency of 22 mHz pM−1 for the impact frequency. Finally, to demonstrate the possibility of future on‐site applications, an in‐house built portable nanoparticle detection (POND) device is used to measure Faradaic AgNP impacts on a SPMEA, in a solution contaminated with urea. [ABSTRACT FROM AUTHOR]

Copyright of Mundo Agrario is the property of Universidad Nacional de La Plata and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Studies have shown that ancient cultures used microalgae as food for centuries. Currently, scientific reports highlight the value of nutritional composition of microalgae and their ability to accumulate polyunsaturated fatty acids at certain operational conditions. These characteristics are gaining increasing interest for the aquaculture industry which is searching for cost-effective replacements for fish meal and oil because these commodities are one of the most significant operational expenses and their dependency has become a bottleneck for their sustainable development of the aquaculture industry. This review is aimed at highlighting the use of microalgae as polyunsaturated fatty acid source in aquaculture feed formulations, despite their scarce production at industrial scale. Moreover, this document includes several approaches to improve microalgae production and to increase the content of polyunsaturated fatty acids with emphasis in the accumulation of DHA, EPA, and ARA. Furthermore, the document compiles several studies which prove microalgae-based aquafeeds for marine and freshwater species. Finally, the study explores the aspects that intervene in production kinetics and improvement strategies with possibilities for upscaling and facing main challenges of using microalgae in the commercial production of aquafeeds. [ABSTRACT FROM AUTHOR]

The article addresses the concept of force steadiness in muscle contractions, focusing on the introduction of "yank" as a potential alternative metric to quantify force smoothness. It discusses the differences between yank and traditional measures like coefficient of variation, challenges in its implementation such as non-normalization, and the need for further validation to establish its reliability and utility in assessing muscle force control.

Copyright of Medicina Interna de Mexico is the property of Colegio de Medicina Interna de Mexico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)