Results 71 to 80 of about 4,562 (143)

Los nuevos conceptos en oxido-reducción y la respiración animal

Revista de la Facultad de Medicina, 1942
En Química General, una oxidación consiste en la pérdida de uno o más electrones, o sea en la pérdida de un quantum o varios quanta de electricidad negativa. Y una reducción es lo contrario: la adquisición de uno o más electrones. La anterior explicación
Aristides García Torres
doaj  

Photodegradation of red 40 via a manganese (II)-based photo-Fenton like process

Results in Chemistry
Red 40 (R40) is an azo dye continuously discharged into wastewater effluents from the food, cosmetic, and textile industries. It is highly persistent, toxic, and potentially carcinogenic to aquatic organisms.
Magda Micaela Meneses-López, Claudia Romo-Gómez, César Camacho-López, Araceli Castañeda-Ovando, Otilio Arturo Acevedo-Sandoval, Fernando Salas-Martínez   +5 more
doaj   +1 more source

Biolixiviación de mineral cuarzo por Acidithiobacillus ferrooxidans en reactor de columna por gravedad

Revista de Metalurgia, 2017
La biolixiviación es el proceso mediante el cual se extrae cobre de minerales sulfuros de baja ley usando microorganismos. La lixiviación química se aplica preferentemente para extraer cobre de minerales oxidados o mixtos, pero no existe información de ...
Ronald Huarachi-Olivera, Alex Dueñas-Gonza, Ursulo Yapo, Moisés Almanza, Dennys Manuel, Antonio Lazarte-Rivera, Gelbert Mogrovejo-Medina, Homar Taco-Cervantes, Mario Esparza   +8 more
doaj   +1 more source

Recent advances of emergent extraction technologies to enhance bioactive compounds extraction of microalgae—An overview towards application in cosmetics

International Journal of Cosmetic Science, Volume 48, Issue 4, Page 884-910, August 2026.
Microalgae extracts show immense potential in cosmetics for their bioactivities; emerging extraction techniques enhance bioactive compound yield from microalgae. Abstract Microalgae have attracted significant interest in numerous sectors, particularly in the cosmetic industries, owing to their rich composition of bioactive compounds. This paper aims to
Alireza Mousakhani Ganjeh, Lucília da P. da Silva, Carlos A. Pinto, Rosário Martins, Alexandra P. Marques, Jorge A. Saraiva   +5 more
wiley   +1 more source

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Doped Polypyrrole

International Journal of Electrochemical Science, 2011
In this work, polypyrrole films were electrosynthesized from aqueous media onto a graphite-epoxy resin composite electrode (GCE) using sulphate ions as dopant.
T. de J. Licona-Sánchez, G.A. Álvarez-Romero, M. Palomar-Pardavé, C.A. Galán-Vidal, M.E. Páez-Hernández, M. T. Ramírez Silva, M. Romero-Romo   +6 more
doaj   +1 more source

Hydrolysates from a Whey Protein Concentrate Are a Promising Functional Ingredient for Diabetes Control via DPP-IV Inhibition

Biology and Life Sciences Forum
The circular economy has been a strategy for diminishing waste and improving the use of natural resources and energy in different industrial sectors.
Selene Isabel Alvarez-Chávez, Itzury Reyes-Ramírez, Luis Guillermo González-Olivares, Jesús Guadalupe Pérez-Flores, Elizabeth Contreras-López, Laura Berenice Olvera-Rosales, Laura García-Curiel, Emmanuel Pérez-Escalante   +7 more
doaj   +1 more source

Application of an Activated Carbon-Based Support for Magnetic Solid Phase Extraction Followed by Spectrophotometric Determination of Tartrazine in Commercial Beverages

International Journal of Analytical Chemistry, 2015
A method is presented for magnetic solid phase extraction of tartrazine from nonalcoholic beverages. The method involves the extraction and clean-up by activated carbon covered with magnetite dispersed in the sample, followed by the magnetic isolation ...
José A. Rodríguez, Karen A. Escamilla-Lara, Alfredo Guevara-Lara, Jose M. Miranda, Ma. Elena Páez-Hernández   +4 more
doaj   +1 more source

Química Mineral de Leucomicrogranitos Neoproterozóicos do Domínio Rio Grande do Norte [PDF]

Geochimica Brasiliensis, 2013
Leucomicrogranitos relacionados ao ciclo Brasiliano são de ampla distri-buição no Domínio Rio Grande do Norte da Província Borborema, nordeste do Brasil.
Antonio Carlos Galindo, Fernando César Alves da Silva, Zorano Sérgio de Souza   +2 more
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Evidence of young, proximal and primary (YPP) diamond source occurring in alluviums in the Santo Antônio do Bonito, Santo Inácio and Douradinho rivers in Coromandel region, Minas Gerais

Brazilian Journal of Geology
: Magmatism associated with the Alto Paranaíba structural high comprises kimberlites, kamafugites, and alkaline complexes, forming an approximately 400 x 150 km NW-SE belt in the southern São Francisco Craton.
Rogério Silvestre Pereira, Reinhardt Adolfo Fuck, Osvaldo Soares França, Anival Antônio Leite   +3 more
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Eudialyte-group minerals from the Monte de Trigo alkaline suite, Brazil: composition and petrological implications

Brazilian Journal of Geology
: The Monte de Trigo alkaline suite is a SiO2-undersaturated syenite-gabbroid association from the Serra do Mar alkaline province. Eudialyte-group minerals (EGMs) occur in one nepheline microsyenite dyke, associated with aegirine-augite, wöhlerite ...
Gaston Eduardo Enrich Rojas, Excelso Ruberti, Rogério Guitarrari Azzone, Celso de Barros Gomes   +3 more
doaj   +1 more source