Results 41 to 50 of about 246,131 (378)

Achieved learning by students in a Physics course [PDF]

, 2013
En este trabajo se describen los aprendizajes logrados por alumnos del curso de Física I tratando de vislumbrar desempeños vinculados con la construcción de ese perfil.
Cleva, Mario, Espasandin, Fabiana Daniela, Ibarra, Zulma, Meza, Susana, Rodríguez, Silvia, Yfran, María   +5 more
core   +2 more sources

Membrane Vesicles from Lacticaseibacillus Casei BL23 Exhibit Antimicrobial Activity Against Escherichia coli and Immunostimulatory Effects on Human Peripheral Blood Mononuclear Cells

Advanced Healthcare Materials, EarlyView.
Membrane vesicles derived from the probiotic Lacticaseibacillus casei BL23 demonstrate antimicrobial properties against Escherichia coli and a potential biological effect in improving the overall survival of C. elegans infected with Pseudomonas aeruginosa. These vesicles stimulated immune responses in primary cells without causing toxicity. Our results
Cecilia L. D'Antoni, Leila Pourtalebi Jahromi, Lorenzo Sana, Ana Paula Domínguez Rubio, Maja Dorfner, Jennifer Munkert, Heike Danzer, Philipp Arnold, Mikhail Lebedev, Esther Zanin, Oscar E. Pérez, Gregor Fuhrmann   +11 more
wiley   +1 more source

Low-Cost Electronic Nose for Identification of Wood Species in Which Brazilian Sugar Cane Spirit Was Aged

Chemosensors
Many popular alcoholic beverages, such as Brazilian sugar cane spirit (cachaça), are aged in wood casks to achieve a smoother and more pleasant taste.
Alexandre A. da Silva, Bruna R. Vieira, Elaine Y. Yamauchi, Rosamaria W. C. Li, Jonas Gruber   +4 more
doaj   +1 more source

Pratica de ensino de quimica

, 1992
Ricardo Gauche
openalex   +2 more sources

Spiro‐Phenothiazine Hole‐Transporting Materials: Unlocking Stability and Scalability in Perovskite Solar Cells

Advanced Materials, EarlyView.
Fluorene‐functionalized spiro‐phenothiazine (PTZ‐Fl) exhibits strong Li+ affinity and thermal stability, enabling a PCE of 25.75% in small‐area cells and 22.07% in 25 cm2 modules. Under ISOS‐L3 conditions, PTZ‐Flbased devices retain over 80% efficiency after 1000 hours, demonstrating superior stability and scalability compared to spiro‐OMeTAD for next ...
Javier Urieta‐Mora, Seung Ju Choi, Jaeki Jeong, Silvia Orecchio, Inés García‐Benito, Manuel Pérez‐Escribano, Joaquín Calbo, Likai Zheng, Minseop Byun, Seyeong Song, Gi‐Hwan Kim, Shaik M. Zakeeruddin, Seog‐Young Yoon, Yimhyun Jo, Agustín Molina‐Ontoria, Enrique Ortí, Nazario Martín, Michael Grätzel   +17 more
wiley   +1 more source

Understanding organic materials performance in field-effect transistors [PDF]

, 2017
Comunicación oralIn the last years, much of our effort has been devoted to the search and study of new high-mobility semiconductors for organic thin film transistors.
Arrechea-Marcos, Iratxe, López Espejo, Guzmán, López-Navarrete, Juan Teodomiro, Ponce-Ortiz, Rocio, Segura, Jose L.   +4 more
core  

Gamificando as aulas de química: uma análise prospectiva das propostas de licenciandos em química

, 2018
Com o objetivo de analisar as propostas de gamificar as aulas de quimica, este artigo relata os resultados de uma investigacao realizada com setenta e nove (79) estudantes da licenciatura em quimica de uma universidade federal. Para contemplar o objetivo
B. S. Leite
semanticscholar   +1 more source

Stepwise On‐Surface Synthesis and Transformations of Two‐Dimensional Covalent Organic Frameworks by Controlled Thermal Stimuli

Advanced Materials, EarlyView.
The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán, Elena Pérez‐Elvira, Diego J. Vicent, Marco Lozano, Diego Soler‐Polo, Koen Lauwaet, José M. Gallego, Rodolfo Miranda, José I. Urgel, Pavel Jelínek, Nazario Martín, David Écija   +11 more
wiley   +1 more source

Dextrans in Aqueous Solution. Experimental Review on Intrinsic Viscosity Measurements and Temperature Effect [PDF]

, 2014
The study of biopolymers as dextran in aqueous solution, is effectively determined by intrinsic viscosity [η] measurements at different temperatures. Molecular weight (Mv) and hydrodynamic properties can be calculated from there.
Masuelli, Martin Alberto
core   +2 more sources

Los caminos hacia una enseñanza no tradicional de la química

, 2018
Es preocupante como todavia hay docentes (de quimica) que piensan que la ensenanza es llenar con conocimientos a quienes serian “contenedores vacios”, es decir, los estudiantes.
G. J. González, M. Mostue
semanticscholar   +1 more source