Results 71 to 80 of about 140,762 (162)

Una química analítica alternativa. Aprendizaje con métodos activos [PDF]

, 2006
Se presenta un nuevo proyecto para el aprendizaje universitario de la química analítica con métodos activos. La hipótesis inicial del trabajo consiste en considerar que una acción docente se lleva a cabo con calidad cuando permite que un alumno apruebe ...
Mantovani, Víctor, Pividori, María Isabel   +1 more
core  

Evaluation of the Therapeutic Potential of Bioactive Materials Based on a Complex of Oxidovanadium(IV) and Exopolysaccharide Levan in a Model of Insulin Resistance in Mice

ChemMedChem, Volume 21, Issue 4, 25 February 2026.
A low‐toxicity bioactive composition of oxidovanadium(IV) and exopolysaccharide levan is synthesized, characterized, and shown to reduce hyperglycemia, hypertriglyceridemia, and TyG index in a mice model of dexamethasone‐induced insulin resistance. Bioactive compositions containing vanadium complexes have been a viable strategy for constructing more ...
Amanda K. J. P. F. da Silva, Eucilene K. de L. B. Marques, Lidiane M. A. de Lima, Widarlane A. S. Alves, Dayane A. Gomes, Pedro L. Guzzo, Mônica F. Belian, Wagner E. Silva, Eduardo C. Lira   +8 more
wiley   +1 more source

Evaluation of the water related characteristics of diverse Spanish stones after the application of different protective treatments

Materiales de Construccion, 1995
The characteristics related to water absorption of some important stones very used in the southern of Spain were tested before and after the application of diverse commercial protective treatments, including the application of diverse dilutions and the ...
L. Rubio, A. Bello
doaj   +1 more source

Determination of sulphides in cements by using potentiometry with a selective electrode of sulphides

Materiales de Construccion, 1988
A procedure for the determination of sulphides attackable by HCI (1 :3) in cements by means of a potentiometric determination with a selective electrodo of sulphides, is proposed.
José Luis Bernal, Jesús del Nozal, Luis Deban, M. Luz Tascón, Ángel Sánchez Cerrato   +4 more
doaj   +1 more source

Llengües electròniques per al monitoratge ambiental remot [PDF]

, 2008
Les llengües electròniques són sistemes capaços de proporcionar informació analítica química en temps real i in situ. Aquest treball explora amb èxit l'ús de diferents llengües electròniques potenciomètriques en aplicacions de monitoratge ambiental, amb ...
Valle Zafra, Manuel del
core   +1 more source

N‐(Heptafluoroisopropylthio)saccharin as a Practical Reagent for Electrophilic –SCF(CF3)2 Installation

Advanced Synthesis &Catalysis, Volume 368, Issue 3, 3 February 2026.
A bench‐stable saccharin electrophilic reagent enables the direct installation of the heptafluoroisopropylthio group onto diverse (hetero)arenes and amines under mild conditions. The method forms CSRF and NSRF bonds in a single step and allows subsequent oxidation to sulfonamides.
Javier Jaureguizar, Jordi Mestre, Miguel Bernús, M. Isabel Matheu, Omar Boutureira   +4 more
wiley   +1 more source

Biochemical Responses of Anopheles spp. Larvae to a Novel Brazilian BR101 Bacillus thuringiensis var. israelensis Formulation: Oxidative Stress, Detoxification Enzymes, and Safety for Nontarget Notonectidae and Gerridae Aquatic Insects

Chemistry &Biodiversity, Volume 23, Issue 2, February 2026.
Bti BR101 exhibits strong larvicidal activity against Anopheles larvae spp., with dose‐dependent mortality and LC50 of 3.13 µg/mL. Bti increases ROS, lipid and protein oxidation, and activates antioxidant enzymes (SOD, CAT, GPx) and detoxification pathways (MFO and esterases), indicating moderate oxidative stress.
Izabel Cristina de Oliveira Bentes, Dayane Dantas Abensour, Maria Luiza Lima da Costa, Raquel Telles de Moreira Sampaio, Leticia Bernadete da Silva, Francisco Augusto da Silva Ferreira, Cláudia Patrícia da Silva Tavares, Hergen Vieira de Souza, Francisco de Assis Marque, Mário Antonio Navarro da Silva, Eduarda Andrade de Lima, Gislayne Trindade Vilas‐Boas, João Antonio Cyrino Zequi, André Correa de Oliveira, Rosemary Aparecida Roque   +14 more
wiley   +1 more source

Is Promiscuous CALB a Good Scaffold for Designing New Epoxidases?

Molecules, 2015
Candida Antarctica lipase B (CALB) is a well-known enzyme, especially because of its promiscuous activity. Due to its properties, CALB was widely used as a benchmark for designing new catalysts for important organic reactions.
Isabel Bordes, José Recatalá, Katarzyna Świderek, Vicent Moliner   +3 more
doaj   +1 more source

Obtención y caracterización de octadecil-silice para cromatografía [PDF]

, 1991
Tesis (Maestría en Ciencias, con Especialidad en Química Analítica) UANLUANLhttp://www.uanl ...
Sáenz Tavera, Isabel del Carmen
core  

Improving the On-Line Extraction of Polar Compounds by IT-SPME with Silica Nanoparticles Modified Phases

Separations, 2018
In the present work the extraction efficiency of in-tube solid-phase microextraction (IT-SPME) for polar herbicides has been evaluated using extractive capillaries coated with different polymeric sorbents.
Pascual Serra-Mora, Carlos E. Rodríguez-Palma, Jorge Verdú-Andrés, Rosa Herráez-Hernández, Pilar Campíns-Falcó   +4 more
doaj   +1 more source