Assessing soil erosion in a semiarid ecosystem in Central Argentina using 137Cs and 7Be measurements.

Argentina is a Latin American country which encounters soil degradation problems. The most productive regions have implemented conservative land practices (no-till). However, agricultural frontier has been displaced to marginal lands with arid and semiarid climates, with the consequent disappearance in many areas of native forest and land degradation. In this work, the fallout of gamma-emitting radionuclides, 137Cs and 7Be, was jointly used to assess changes in soil erosion in a recently converted semiarid ecosystem into agricultural land. 137Cs was utilized to estimate the erosion over the past 60 years, whereas 7Be was employed to estimate the erosion after the conversion of the area to cultivated land and soil tillage. For 137Cs the Proportional Model (PM), the Mass Balance Model II (MBMII) and the MODERN model were used, for 7Be the Profile Distribution Model (PDM) and the MODERN model were used. 137Cs indicates mean erosional rates of 8.2, 10.5 and 6.5 Mg ha-1 a-1, using MBMII, PM and MODERN, respectively, and that a soil layer between 0.5 and 0.8 mm was annually lost by erosion. By applying a 7Be tracer, we measured erosion rates of 2.4 and 3.3 Mg ha-1 (with PDM and Modern, respectively), indicating the loss of the upper 0.2 mm of soil. This erosion can be attributed to a few heavy rainfalls that occurred within the past 90 days. The results suggest that current land management practices have led to an increase in soil erosion. This could be attributed to the fact that the soil remains bare after crop harvest, which may compromise its conservation and future productivity.

Towards objectivity in ethical assessment: legibility as part of informed consent form comprehension.

BACKGROUND: The experience on informed consent form (ICF) readability at the Research Ethics Committee of the National Institute of Cancerology of Mexico (INCan) is described. OBJECTIVE: To evaluate the readability of a randomly-selected sample of ICFs submitted for review between March 1, 2022 and March 31, 2023. The number of pages, the time the reader takes to read the text and the level of education necessary to understand it were determined. RESULTS: More than half the ICFs from internal investigations were shown to be somewhat or very difficult to read; the level of education required to understand them was up to 9.9 years, and the reading time was short. The ICF texts from international multicenter investigations were aimed at an average education level of 5.5 years and had normal readability. Most ICFs from external trials require a reading time of more than 60 minutes per ICF. CONCLUSION: It is necessary to have tools that provide objectivity to the evaluation of ICFs under investigation by ethics committees, which should be indicators of their comprehension, such as readability of the documents.

ANTECEDENTES: Se describe la experiencia sobre la legibilidad de los formatos de consentimiento informado (FCI) del Comité de Ética en Investigación del Instituto Nacional de Cancerología de México. OBJETIVO: Evaluar la legibilidad de una muestra seleccionada aleatoriamente de FCI sometidos para revisión entre el 1 de marzo de 2022 y el 31 de marzo de 2023. Se determinó el número de páginas, el tiempo que el lector invierte para leer el texto y el grado de escolaridad necesario para comprenderlo. RESULTADOS: Más de la mitad de FCI de investigaciones internas mostraron ser algo o muy difíciles de leer, la escolaridad necesaria para comprenderlos fue hasta de 9.9 años y el tiempo de lectura fue corto. Los textos de los FCI de investigaciones internacionales multicéntricas estuvieron dirigidos a un nivel escolar promedio de 5.5 años y tuvieron una legibilidad normal. La mayor parte de los ensayos externos requiere un tiempo de lectura superior a los 60 minutos por FCI. CONCLUSIÓN: Es necesario disponer de herramientas que den objetividad a la evaluación de los FCI en investigación por parte de los comités de ética y sean indicadores de su comprensión, tales como la legibilidad de los documentos.

Hacia la objetividad en la valoración ética: legibilidad como parte de la comprensión de los formatos de consentimiento informado / Towards objectivity in ethical assessment: legibility as part of informed consent form comprehension

Resumen Antecedentes: Se describe la experiencia sobre la legibilidad de los formatos de consentimiento informado (FCI) del Comité de Ética en Investigación del Instituto Nacional de Cancerología de México. Objetivo: Evaluar la legibilidad de una muestra seleccionada aleatoriamente de FCI sometidos para revisión entre el 1 de marzo de 2022 y el 31 de marzo de 2023. Se determinó el número de páginas, el tiempo que el lector invierte para leer el texto y el grado de escolaridad necesario para comprenderlo. Resultados: Más de la mitad de FCI de investigaciones internas mostraron ser algo o muy difíciles de leer, la escolaridad necesaria para comprenderlos fue hasta de 9.9 años y el tiempo de lectura fue corto. Los textos de los FCI de investigaciones internacionales multicéntricas estuvieron dirigidos a un nivel escolar promedio de 5.5 años y tuvieron una legibilidad normal. La mayor parte de los ensayos externos requiere un tiempo de lectura superior a los 60 minutos por FCI. Conclusión: Es necesario disponer de herramientas que den objetividad a la evaluación de los FCI en investigación por parte de los comités de ética y sean indicadores de su comprensión, tales como la legibilidad de los documentos.

Abstract Background: The experience on informed consent form (ICF) readability at the Research Ethics Committee of the National Institute of Cancerology of Mexico (INCan) is described. Objective: To evaluate the readability of a randomly-selected sample of ICFs submitted for review between March 1, 2022 and March 31, 2023. The number of pages, the time the reader takes to read the text and the level of education necessary to understand it were determined. Results: More than half the ICFs from internal investigations were shown to be somewhat or very difficult to read; the level of education required to understand them was up to 9.9 years, and the reading time was short. The ICF texts from international multicenter investigations were aimed at an average education level of 5.5 years and had normal readability. Most ICFs from external trials require a reading time of more than 60 minutes per ICF. Conclusion: It is necessary to have tools that provide objectivity to the evaluation of ICFs under investigation by ethics committees, which should be indicators of their comprehension, such as readability of the documents.

Arbuscular Mycorrhizal Symbiosis Improves Ex Vitro Acclimatization of Sugarcane Plantlets (Saccharum spp.) under Drought Stress Conditions.

The symbiotic associations between arbuscular mycorrhizal fungi (AMF) and plants can induce drought stress tolerance. In this study, we evaluated the effect of Glomus intraradices, a mycorrhizal fungus, on the ex vitro development and survival of sugarcane plantlets subjected to drought stress during the acclimatization stage of micropropagation. In vitro obtained sugarcane plantlets (Saccharum spp. cv Mex 69-290) were inoculated with different doses of G. intraradices (0, 100, and 200 spores per plantlet) during greenhouse acclimatization. Sixty days after inoculation, plantlets were temporarily subjected to drought stress. We evaluated the survival rate, total chlorophyll, total protein, carotenoids, proline, betaine glycine, soluble phenolic content, and antioxidant capacity every 3 days for 12 days. Symbiotic interaction was characterized by microscopy. Our results showed that the survival rate of inoculated plants was higher in 45% than the treatment without mycorrhizae. Total chlorophyll, protein, proline, betaine glycine content, and antioxidant capacity were increased in AMF inoculated plants. The soluble phenolic content was higher in non-inoculated plants than the treatment with mycorrhizae during the drought stress period. Microscopy showed the symbiotic relationship between plant and AMF. The early inoculation of 100 spores of G. intraradices per sugarcane plantlet during the acclimatization stage could represent a preconditioning advantage before transplanting into the field and establishing basic seedbeds.

Robotics for neuroendovascular intervention: Background and primer.

The simultaneous growth of robotic-assisted surgery and telemedicine in recent years has only been accelerated by the recent coronavirus disease 2019 pandemic. Robotic assistance for neurovascular intervention has garnered significant interest due to opportunities for tele-stroke models of care for remote underserved areas. Lessons learned from medical robots in interventional cardiology and neurosurgery have contributed to incremental but vital advances in medical robotics despite important limitations. In this article, we discuss robot types and their clinical justification and ethics, as well as a general overview on available robots in thoracic/abdominal surgery, neurosurgery, and cardiac electrophysiology. We conclude with current clinical research in neuroendovascular intervention and a perspective on future directions.

'I feel safer in the streets than at home': Rethinking harm reduction for women in the urban margins.

Through qualitative data collected with women affected by drug use and drug-related violence in Bogotá, this article explores the convergence of harm reduction rationales and violence prevention programming in the urban margins to advocate for women's health empowerment and health rights as victims of intergenerational trauma and violence. We propose a methodological shift of public health praxis from street-based outreach models to intimate spaces of intervention for health outcomes embodiment 1 as we continue to develop our community health model to work with marginalised communities in the urban global South. Through this work committed to social justice in marginalised urban communities, we seek to support women's health needs through harm reduction in historically marginalised communities in urban settings. Our results expose how multi-level gender-based violence affects women's health in their living spaces in the urban margins. Drawing from women's voices and narratives of urban violence, we call for a feminist alternative to traditionally masculinist and public-space oriented harm reduction practice for health empowerment in the urban margins.

Muscarinic Receptor Activation Affects Pulmonary Artery Contractility in Sheep: The Impact of Maturation and Chronic Hypoxia on Endothelium-Dependent and Endothelium-Independent Function.

Giang, Michael, Demosthenes G. Papamatheakis, Dan Nguyen, Ricardo Paez, Carla Blum Johnston, Joon Kim, Alexander Brunnell, Quintin Blood, Ravi Goyal, Lawrence D. Longo, and Sean M. Wilson. Muscarinic receptor activation affects pulmonary artery contractility in sheep: the impact of maturation and chronic hypoxia on endothelium-dependent and endothelium-independent function. High Alt Med Biol. 17:122-132, 2015.-Muscarinic receptor activation in the pulmonary vasculature can cause endothelium-dependent vasodilation and smooth muscle-dependent vasoconstriction. Chronic hypoxia (CH) can modify both of these responses. This study aimed to assess the combined influence of CH and maturation on endothelium-dependent and endothelium-independent muscarinic-induced vasoreactivity. This was accomplished by performing wire myography on endothelium-intact or endothelium-disrupted pulmonary arterial rings isolated from normoxic or CH fetal and adult sheep. In endothelium-intact arteries, vasodilation was evaluated using cumulative bradykinin doses in phenylephrine and carbachol precontracted pulmonary arterial segments; and vasoconstriction was examined using cumulative doses of carbachol following bradykinin predilation. Effects of nonselective (atropine) and selective M1 (pirenzepine), M2 (AFDX116), and M3 (4-DAMP and Dau5884) muscarinic receptor antagonists were assessed in disrupted arteries. In normoxic arteries, bradykinin relaxation was twofold greater in the adult compared to fetus, while carbachol contraction was fourfold greater. In adult arteries, CH increased bradykinin relaxation and carbachol contraction. In vessels with intact endothelium, maturation and CH augmented maximal response and efficacy for carbachol constriction and bradykinin relaxation. Approximately 50%-80% of adult normoxic and CH endothelium-disrupted arteries contracted to acetylcholine, while ∼50% of fetal normoxic and ∼10% of CH arteries responded. Atropine reduced carbachol-induced contraction in all vessels. Adult normoxic vessels were most responsive to M3 antagonism, fetal to M2 antagonism, while M1 inhibition had no effect. Overall, muscarinic-induced pulmonary arterial contraction is partially endothelium dependent and appears to develop after birth. Fetuses are more reliant on M3 receptors while M2 receptors predominate in adults, whereas CH augments muscarinic-dependent pulmonary vasoconstriction in both.

International research and just sharing of benefits in Mexico.

International research enrolling human subjects has raised an ethical concern regarding the just distribution of benefits between the countries that design the research and the host communities. Although several universal declarations have expressed this concern, a gap between theory and practice continues to exist, as well as a significant divergence between the design of the research protocol and the social context where it will be implemented. Although institutional review boards have made a valuable effort to evaluate international research, their sensitivity to the just sharing of research benefits as well as their attention to the social context must be evaluated. This article analyzes the distribution of benefits in a review of international research in Mexico and produces an ethical reflection based on the results.