Results 41 to 50 of about 1,293 (95)

Síntesis de Zeolitas ZSM-11 con Porosidad Jerarquizada

Tecnología y Ciencia, 2019
En este trabajo se propone la creación de porosidad adicional en zeolitas microporosas  con estructura ZSM-11 mediante síntesis directa utilizando un surfactante catiónico (CTAB) como plantilla mesoporosa.
Luciana Bonetto, Emilce D. Galarza, Liliana B. Pierella, Clara Saux   +3 more
doaj   +1 more source

Análise da adsorção de tensoativo catiônico em rocha calcária [PDF]

, 2016
The current scenario of the offshore oil industry in Brazil is marked by major discoveries such as the pre-salt, where there is an expansion of sea explorations. For instance, the pre-salt layer, which expanded the sea explorations.
Barbosa, Wesley
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31 Caracterización funcional de almidón catiónico de yuca ( Manihot esculenta )

Revista Ion, 2013
Cationic starches were obtained from native starch extracted from cassava of three different varieties at different temperatures (28-50°C) and reaction times (7-24h) using 2,3-epoxypropyltrimethylammonium (EPTAC) as cationizing reactive and NaOH as ...
Karen Paola Contreras Lozano, airo Guadalupe Salcedo Mendoza, Francisco Estrada Garrido   +2 more
doaj  

Síntese e caracterização de argilas organofílicas contendo diferentes teores do surfactante catiônico brometo de hexadeciltrimetilamônio

Química Nova, 2011
The major applications of organoclays are in adsorption of organic polluents. The objective of this work was the synthesis and characterization of organoclays using differents amounts of cationic surfactant hexadecyltrimethylammonium bromide.
Christian Wittee Lopes, Fábio G Penha, Renata Martins Braga, Dulce Maria de Araújo Melo, Sibele B. C Pergher, Diego Ivan Petkowicz   +5 more
doaj   +1 more source

Adsorção de tensoativo catiônico para organofilização de argila atapulgita [PDF]

, 2018
The great challenges coming from well drilling, there was a need to develop or modify fluids whose properties were able to follow drilling requirement.
Gois, Alisson Gabriel Brito
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Comparación de metodologías analíticas para diagnosticar suelos con enmiendas básicas en el ámbito templado argentino

Ciencia del Suelo
Se desconoce si los protocolos de pH y capacidad de intercambio catiónico usados actualmente son igualmente apropiados para el seguimiento de la evolución de la acidez del suelo con encalado previo.
Andrea E Pellegrini, Florencia A Sucunza, Guillermo Millán, Mabel E Vázquez   +3 more
doaj  

REMOCIÓN DE COBRE Y NÍQUEL POR INTERCAMBIO CATIÓNICO CON UNA ZEOLITA NATURAL

Revista Colombiana de Química, 2010
Se empleó la zeolita natural clinoptilolita, para remover cobre y níquel de aguas residuales de una industria de galvanotecnia. La capacidad de intercambio determinada para la zeolita transformada al estado homoiónico sódico, fue de 0,794 meq/g para ...
Arnoldy Estupiñan, Diego Sarmiento, Ana María Belalcázar de GAlvis   +2 more
doaj  

Characterization of Coffea arabica L. parent plants and physicochemical properties of associated soils, Peru. [PDF]

Heliyon, 2022
Wigoberto Alvarado C, Bobadilla LG, Valqui L, Valqui GS, Valqui-Valqui L, Valqui-Valqui L, Vigo CN, Vásquez HV.   +7 more
europepmc   +1 more source

[Substance P, proinflammatory cytokines, transient receptor potential vanilloid subtype 1 and COVID-19: A working hypothesis]. [PDF]

Neurologia (Engl Ed), 2021
Aguirre-Siancas EE, Colona-Vallejos E, Ruiz-Ramirez E, Becerra-Bravo M, Alzamora-Gonzales L.   +4 more
europepmc   +1 more source

Obtenção de argilominerais organofilizados por tensoativo catiônico [PDF]

Clay minerals comprise a versatile class of materials used to design new multifunctional materials, such as new viscosifying additives for oil-based drilling fluids.
Feitosa, Isaque Augusto Aragão
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