Results 41 to 50 of about 256,935 (224)

IL-6 serum levels predict severity and response to tocilizumab in COVID-19: An observational study

open access: yesJournal of Allergy and Clinical Immunology, 2020
Background Patients with coronavirus disaese 2019 (COVID-19) can develop a cytokine release syndrome that eventually leads to acute respiratory distress syndrome requiring invasive mechanical ventilation (IMV).
J. Galván-Román   +139 more
semanticscholar   +1 more source

From Light‐Driven to Dark Synthesis: Streamlining Perfluoroalkyl Selenide Ether Formation

open access: yesEuropean Journal of Organic Chemistry, Volume 29, Issue 5, 7 February 2026.
Two orthogonal and user‐friendly protocols enable the efficient construction of (Se/S)RF bonds from simple dichalcogenides and perfluoroalkyl iodides. Visible‐light irradiation at 395 nm promotes seleno‐ and thioether formation, while a dark KOH/MeCN variant delivers selenoethers in minutes. Both approaches operate under mild, metal‐ and photocatalyst‐
Loydel Torres Barroso   +5 more
wiley   +1 more source

Diseño del Proceso de Obtención de Queso Fresco en la Provincia de Chimborazo en el Software SuperPro Designer

open access: yesIngenio, 2023
El queso fresco constituye un alimento rico en nutrientes, además es considerado como un excelente complemento alimenticio. En Ecuador la producción de queso se realiza de manera artesanal lo cual implica insuficientes condiciones higiénico-sanitarias y
Reni Danilo Vinocunga Pillajo   +2 more
doaj  

Sildenafil prevents right ventricular hypertrophy and improves heart rate variability in rats with pulmonary hypertension secondary to experimental diabetes

open access: yesClinical and Experimental Hypertension, 2022
Chronic treatment with sildenafil (SILD) is an effective protector on the development of cardiovascular complications of pulmonary hypertension (PH) and diabetes.
Miguel Angel Garcia-Gonzalez   +7 more
doaj   +1 more source

Ecological Niche Differences Underlie the Assembly of Endemic Birds in Acrobiont Forests of Northern Mesoamerica

open access: yesJournal of Biogeography, Volume 53, Issue 1, January 2026.
ABSTRACT Aim The study of the structure of species assemblages has typically assumed that similar environments share common species; however, interacting biogeographic and phylogenetic processes are equally important. The understanding that ecological processes operate at different spatial scales to shape species assemblages led to the concept of ...
Luis A. Sánchez‐González   +2 more
wiley   +1 more source

El Contrato Social toca fondo ¿Qué sigue?

open access: yesRevista Kavilando, 2023
Centro y Sur América, allí Colombia, tienen una condición especial en un escenario de crisis global, la primera es que posee los recursos naturales que requiere el mundo para paliar la crisis y la segunda, es que intenta consolidarse una nueva ola ...
Alfonso Insuasty Rodríguez   +10 more
doaj   +1 more source

La guerra naval en Castilla durante la Baja Edad Media [PDF]

open access: yes, 2009
The state of knowledge about the evolution of Castilian war fleets from Alfonso X to the Catholic Monarchs, based on an analysis of the traditional bibliography and new documentary sources.
Aznar Vallejo, Eduardo
core   +1 more source

Offshore Record of Explosive Volcanic Eruptions in the Southern Part of the Panamá Basin During the Past 10 Myr: 2. Inferences About the Construction of the Northern Andean Arc and Regional Geodynamics

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Volcanic material preserved in marine and lacustrine sediments is a key high‐resolution archive for studying the past eruptive history of volcanic regions. In this work, we use the geochemical and isotopic compositions of marine volcanic glass shards, the thicknesses, and age models of tephra layers preserved in the deep sediments of the ...
Mathilde Bablon   +10 more
wiley   +1 more source

Comparative genomics reveals common diversity and adaptation to harsh environments in the Arabian Peninsula indigenous chickens

open access: yesAnimal Genetics, Volume 56, Issue 3, June 2025.
Abstract Identifying genomic regions under selection is crucial for comprehending the evolutionary history of the domestic chicken. Arabian Peninsula (AP) indigenous chickens are mostly found outdoors, being reared alongside other livestock for production purposes.
Abdulwahad Assiri   +9 more
wiley   +1 more source

Cardiovascular involvement and manifestations of systemic Chikungunya virus infection: A systematic review [version 1; referees: 1 approved, 2 approved with reservations]

open access: yesF1000Research, 2017
Background: In the last three years, chikungunya virus disease has been spreading, affecting particularly the Americas, producing more than two million cases.
María Fernanda Alvarez   +3 more
doaj   +1 more source

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