Results 41 to 50 of about 8,553 (156)

3D‐Printed Geopolymer as a Basic Heterogeneous Catalyst for the Synthesis of α‐Cyanoacrylates Through the Knoevenagel Condensation

European Journal of Organic Chemistry, Volume 29, Issue 16, 25 April 2026.
3D‐printed geopolymers are presented as efficient and reusable heterogeneous catalysts for the Knoevenagel condensation. Under mild and green conditions, they promote the high‐yield synthesis of diverse α‐cyanoacrylates with remarkable stability and scalability.
Francesca T. Albino, Pedro A. M. Moro, Wanessa B. Menegaro, Luciano Senff, Marcus M. Sá, Dachamir Hotza   +5 more
wiley   +1 more source

Nanocrystalline Diamond as a Coating for Joint Implants: Cytotoxicity and Biocompatibility Assessment

Journal of Nanomaterials, Volume 2008, Issue 1, 2008., 2008
Nanocrystalline diamond (NCD) coatings combine a very low surface roughness with the outstanding diamond properties, such as superlative hardness, low self‐friction coefficient, high wear and corrosion resistance, and biotolerance, which are ideal features for applications in medicine (knee and hip replacement) and surgical tools.
Margarida Amaral, Pedro S. Gomes, Maria A. Lopes, José D. Santos, Rui F. Silva, Maria H. Fernandes, Zuzanna Siwy   +6 more
wiley   +1 more source

Instalación de recubrimientos cerámicos para pisos [PDF]

, 1996
Presenta una amplia visión de los productos cerámicos y de los sistemas de instalación para diferentes ambientes, y explica la instalación de baldosas cerámicas sobre pisos.It presents a broad vision of ceramic products and installation systems for ...
Merchán C., Raúl, Bustamante, Luis Eduardo, Uribe M., Juan, Castañeda, José Manuel   +3 more
core  

Co‐combustion of coal and biomass waste in pilot‐scale for energy use

Environmental Progress &Sustainable Energy, Volume 44, Issue 3, May/June 2025.
Abstract The use of biomass in co‐combustion systems using fluidized bed technology is considered a viable alternative to reduce the emission of pollutants. The herein study presents an experimental analysis to determine the technical feasibility of using run‐of‐mine (ROM) coal and its waste combined with biomass in a combustor of bubbling fluidized ...
Pedro Rodrigo Silva Moura, Thiago Fernandes de Aquino, Flavio Michels Bianchi, Vanessa Olivo Viola, Beatriz Bonetti, Lauber de Souza Martins, Fernando Henrique Milanese   +6 more
wiley   +1 more source

Low Temperature Synthesis of Li2SiO3: Effect on Its Morphological and Textural Properties

Advances in Materials Science and Engineering, Volume 2008, Issue 1, 2008., 2008
Synthesis, at low temperature, of Li2SiO3 was investigated using different Li : Si molar ratios and urea, which was used as template. This new synthesis was performed in order to look for different textural and morphological properties than those obtained usually by conventional methods in this kind of ceramics. XRD and SEM analyses showed that Li2SiO3
Georgina Mondragón-Gutiérrez, Daniel Cruz, Heriberto Pfeiffer, Silvia Bulbulian, Kevin Knowles   +4 more
wiley   +1 more source

Reuso de resíduo de lama de papel na produção de suporte cerâmico poroso de baixo custo [PDF]

Cerâmica, 2020
Resumo A indústria de papel gera enorme volume de resíduo de lama de papel. Neste trabalho foi desenvolvido um novo suporte cerâmico poroso usando resíduo de lama de papel como matéria-prima alternativa.
R. A. Bou-Issa, R. L. Loiola, J. N. F. Holanda   +2 more
doaj   +1 more source

Biodistance Analysis via Dental Phenotypic Diversity in Early Collective Burials at Cerro Juan Díaz, Panamá (30–650 CE) [Análisis de Biodistancia Mediante la Diversidad Fenotípica Dental en los Entierros Colectivos Tempranos del Cerro Juan Díaz, Panamá (30–650 EC)]

American Journal of Biological Anthropology, Volume 186, Issue 1, January 2025.
PCoA plot showing biodistance by age at the Cerro Juan Díaz site in Central Panamá. ABSTRACT Objectives Burial space reuse and prolonged interaction with the dead were common practices in the Isthmo‐Colombian Area, dating back to at least the Early Ceramic Period in the Greater Coclé region.
Nicole E. Smith‐Guzmán, Jeny Smid Núñez, Jonathan D. Cybulski, Luis A. Sánchez Herrera   +3 more
wiley   +1 more source

Influence of Phase Composition on Sintered Microstructure of Combustion Synthesized Oxides

Advances in Materials Science and Engineering, Volume 2007, Issue 1, 2007., 2007
The effects of powders synthesis methods (urea‐combustion synthesis (CS) and conventional solid‐state (SS) reaction) on the sintering ability, microstructural features, and mechanical properties of Al2O3, MgAl2O4 spinel, and 20 wt.% ZrO2–MgAl2O4 upon sintering at 1625C∘ were investigated.
Ibram Ganesh, J. M. F. Ferreira, Jainagesh A. Sekhar   +2 more
wiley   +1 more source

Caracterización eléctrica del sistema Co3O4 + PVOH mediante el uso de la técnica de espectroscopia de impedancia compleja (IS) en altas temperaturas

Revista Científica, 2018
Resultados en espectroscopia de impedancia muestran valores altos en conductividad eléctrica (10-3–10-4 S/cm) en muestras de Co3O4 + PVOH con barridos en temperatura entre los 80 y 200 °C, indicando un fuerte enlace estructural entre los iones de Co3+Co2+
Wilmer de Jesus Saldarriaga Agudelo, Melisa Buendia, Victor Hugo Zapata Sanchez   +2 more
doaj   +3 more sources

Estado normal del superconductor [Y1-xBax](BaSr)Cu3-y(PO4)yOz

Revista de Investigación de Física, 2013
Estudiamos el estado normal del compuesto superconductor [Y1-xCax](BaSr)Cu3-y(PO4)y0z derivado del YBa2Cu3O7, preparado en condiciones normales de temperatura y presión, mediante medidas de susceptibilidad magnética en el rango de 100–300 K, donde se ...
J. C. González, A. Bustamante
doaj   +1 more source