Results 51 to 60 of about 1,077,223 (343)

Synthesis and characterization of amphiphilic nitroxide 1,1,3,3–tetraethylisoindoline–2–oxyl–5–sodium sulfonate (TEIOSNa)

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal   +3 more
wiley   +1 more source

Design and implementation of a 3D‐printed modular distillation tower for experimental teaching in chemical engineering

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Several authors have reported the disconnection between the skills, abilities, and attitudes of graduates from STEM careers with the current needs of the labour market. In science and engineering fields, research has found the need for interdisciplinary approaches that encourage meaningful learning.
Úrsula Manríquez‐Tolsá   +7 more
wiley   +1 more source

Can ISO/IEC 17025 serve as a tool to prevent scientific fraud in chemical research laboratories?

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Scientific fraud has been documented across multiple disciplines, and chemistry is no exception. Recent studies indicate that contamination of materials, methodological errors, and unreliable data, results, or analyses account for over 25% of retracted publications.
Flor Monica Gutierrez‐Alcantara
wiley   +1 more source

Endoscopic Ultrasound for the Detection of Left Atrial Appendage Thrombus: A Useful Technique in Patients with Transesophageal Echocardiography Contraindication

open access: yesCase Reports in Cardiology, 2016
Endoscopic ultrasound is a diagnostic and therapeutic technique used in specialized centers for patients that have undergone digestive procedures. This technique enables highly precise real-time imaging of the digestive tract wall and surrounding organs.
Manuel Marina-Breysse   +4 more
doaj   +1 more source

Influence of Structural Stiffness and Loss Factor on Railroad Vehicle Comfort

open access: yesApplied Sciences, 2021
This paper presents a new formulation for analyzing a beam on elastic supports traveling on irregular profiles. The model is a first approximation of a passenger railway vehicle car body.
Publio Pintado   +5 more
doaj   +1 more source

Economic and environmental implications of the development of UASB reactors in Mexico for sustainable industrial wastewater treatment

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract The objective of this work is to demonstrate that the inclusion of an up‐flow anaerobic sludge bed (UASB reactor) within an industrial wastewater treatment plant reduces the plant's investment and operating costs compared to a system based solely on conventional complete‐mix activated sludge (CMAS), operating under the same design principles ...
Juan Manuel Morgan‐Sagastume   +1 more
wiley   +1 more source

Diferencias entre fármacos inhibidores del sistema renina-angiotensina en pacientes hipertensos ingresados por COVID-19

open access: yesArchivos de Cardiología de México, 2023
Introducción: Han surgido dudas sobre la seguridad de los fármacos inhibidores del sistema renina-angiotensina (SRA) en pacientes con enfermedad por coronavirus 2019 (COVID-19).
Martín Negreira-Caamaño   +7 more
doaj   +1 more source

Smart City Overseer [PDF]

open access: yes, 2017
“Smart City Overseer ” es un panel de control que permite gestionar los servicios de la ciudad de una manera eficiente por medio de la obtención de la información en tiempo real del estado, tanto real como virtual, de la ciudad y sus incidencias para ...
González Jiménez, Christian   +1 more
core   +1 more source

Green and sustainable synthesis of magnetite from copper slag via citrate complexation for methylene blue dye removal from water

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study proposes a novel, green, and sustainable method for synthesizing magnetic iron oxides from metallurgical copper slag (CS), leveraging its iron content as a valuable resource. Iron was extracted via acid leaching using edible citric acid (ECA), forming a citrate–iron complex (CSL), which was subsequently thermally decomposed at 300°C
Melisa Portilla‐Sangabriel   +4 more
wiley   +1 more source

El poblamiento ibérico en el Alto Guadiana [PDF]

open access: yes, 2011
This paper presents the results of the recent research on the Iberian Iron Age sites conducted in the Upper Guadiana basin of the Ciudad Real province (Castilla-La Mancha).
García Huerta, Rosario   +1 more
core   +2 more sources

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