Results 11 to 20 of about 4,176 (181)

Ketal Protection of Glycerol for Selective Electrosynthesis of Glyceric Acid in Highly Alkaline Media

open access: yesAngewandte Chemie, EarlyView.
Using a ketal‐protected glycerol derivative (solketal) as the oxidation substrate enables site‐selective electrooxidation that suppresses C–C cleavage on non‐noble catalysts. Highly alkaline conditions promote reactive solketal alkoxide formation, weaken the Cα─H bond to facilitate dehydrogenation, and buffer local acidification, enabling a record‐high
Jiamin Wang   +6 more
wiley   +2 more sources

Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”

open access: yesGeophysical Monograph Series, Page 449-486., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Shuan‐Hong Zhang   +4 more
wiley  

+2 more sources

Uso de humedales de flujo subsuperficial con Phragmites australis como alternativa de biorremediación de fuentes superficiales afectadas por drenajes ácidos de minas de carbón

open access: yesTecnología y ciencias del agua, 2021
La minería genera impactos ambientales como drenajes ácidos de minas (DAM). El río Cali es uno de los principales recursos hídricos de la ciudad de Santiago de Cali, Colombia, y está afectado por los drenajes procedentes de minas abandonadas que llegan a
Jorge Antonio Silva-Leal   +3 more
doaj   +1 more source

Enhancing Maturation of Human Neuromuscular Organoids via Electrical Stimulation

open access: yesAdvanced Science, EarlyView.
A framework for on‐demand and non‐invasive exposure of human neuromuscular organoids (NMOs) to electrical stimuli is established to promote their maturation. The robustness and effectiveness of different stimulation regimes are evaluated via thorough characterization of organoid tissue structure and contraction capacity. Chronic electrical stimulation,
Chrysanthi‐Maria Moysidou   +12 more
wiley   +1 more source

Autoantibodies to Extracellular Erythrocyte Band 3 Epitopes Are Associated With Anemia in Plasmodium vivax Infection

open access: yesAmerican Journal of Hematology, EarlyView.
ABSTRACT Plasmodium vivax‐associated anemia is a multifactorial clinical outcome, in which the destruction of uninfected red blood cells (uRBCs) plays a major role in disease development and severity. Here, we identified autoantibody targets within the extracellular loops of Band 3 (B3), a major erythrocyte transmembrane protein.
Aline Marzano‐Miranda   +6 more
wiley   +1 more source

Análisis de la evolución de la inversión extranjera directa en el sector minero del carbón en Colombia de 2004 a 2013

open access: yesApuntes del CENES, 2016
En este artículo se analiza la evolución de nla invresión extranjera directa (IED) en el sector minas y canteras y en la extracción de carbón, lignito y turba en Colombia en el periodo de 2004 a 2013, utilizando Minero Colombiano.
Fabián Alfredo Plazas Díaz
doaj   +1 more source

Remoción de Cromo total en agua, usando carbón mineral activado con radiación de microondas

open access: yesIndustrial Data, 2017
Se estudió la remoción del cromo para validar el uso del carbón mineral activado mediante radiación de microondas, dicha técnica de activación fue usada anteriormente en la oxidación de nanotubos de carbono y carbón vegetal. Se buscó aplicar esta técnica
Juan de la Torre Ostos   +3 more
doaj   +1 more source

Valorization of Post‐Consumer Waste From Metallized Flexible Packaging and Industrial EPM Waste: Development of Sustainable Composites

open access: yesJournal of Applied Polymer Science, EarlyView.
Post‐consumer metallized flexible packaging waste and industrial EPM waste are transformed into sustainable composites through mechanical recycling. The incorporation of 30 wt% EPM provides the most favorable balance between stiffness, ductility, and impact resistance, achieving 53.36 kJ/m2.
Tiago O. Oliveira   +2 more
wiley   +1 more source

La tutela administrativa de la industria del carbón

open access: yesEstudios de Derecho, 1961
La tutela administrativa de la industria del ...
Rafael Restrepo Maya
doaj  

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

open access: yesThe Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro   +7 more
wiley   +1 more source

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