Results 21 to 30 of about 156,677 (249)

BIOTECNOLOGÍA APLICADA A LA DEGRADACIÓN DE COLORANTES DE LA INDUSTRIA TEXTIL

open access: yesEcosistemas y Recursos Agropecuarios, 2014
La presencia de colorantes en las aguas residuales representa un problema ambiental, ya que este tipo de compuestos no puede eliminarse con los métodos de tratamiento convencionales.
A Cortazar-Martínez   +5 more
doaj   +1 more source

Recent Advances in the Use of Transition-Metal Porphyrin and Phthalocyanine Complexes as Electro-Catalyst Materials on Modified Electrodes for Electroanalytical Sensing Applications

open access: yesSolids, 2021
Metalloporphyrins (MP) and metallophtalocyanines (MPc) are innovative materials with catalytic properties that have attracted attention for their application for diverse electrochemical purposes. The presence of metallic centers in their structure offers
J. Antonio Cruz-Navarro   +6 more
doaj   +1 more source

Mineral chemistry of late Variscan gabbros from central Spain: constraints on crystallisation processes and nature of the parental magmas [PDF]

open access: yes, 2015
© 2016. Universidad Complutense de Madrid. The commercial rights of the printed and online versions of Journal of Iberian Geology are property of the Universidad Complutense de Madrid (UCM) and the Consejo Superior de Investigaciones CientÍficas (CSIC),
Jeffries, T   +3 more
core   +3 more sources

Electrochemical incineration of cresols: A comparative study between PbO2 and boron-doped diamond anodes [PDF]

open access: yes, 2009
The electrooxidation of aqueous solutions containing 5 mM of o-, m- and p-cresol at pH 4.0 has been investigated using a flow filter-press reactor with a boron-doped diamond (BDD) under galvanostatic electrolysis. All cresols are degraded at similar rate
Arias, Conchita   +4 more
core   +1 more source

Earliest Results in the Use of Activated Composite Membranes for the Transport of Silver Ions from Aqueous Solutions

open access: yesJournal of Chemistry, 2014
This paper presents the results concerning the first use of activated composite membranes (ACMs) for the facilitated transport of silver ions containing di-(2-ethylhexyl)-dithiophosphoric acid (DTPA) as the carrier.
Yucundo Mendoza-Tolentino   +4 more
doaj   +1 more source

AVALIAÇÃO DA QUALIDADE DE PILHAS ALCALINAS E ZINCO-CARBONO DE DIFERENTES PROCEDÊNCIAS

open access: yesEclética Química, 2018
This work presents a study on the chemical composition of spent batteries manufactured in Brazil and Asian countries. The goal was to compare the quality of these products. Samples were disassembled prior to chemical characterization. The Asian batteries
Leonardo Henrique Coimbra Vieira   +5 more
doaj   +1 more source

BENEFICIAMENTO E CARACTERIZAÇÃO DE QUARTZO PARA OBTENÇÃO DE SILÍCIO GRAU METALÚRGICO

open access: yesHolos, 2012
Este trabalho descreve as etapas de caracterização e purificação de quartzo para obtenção de um silício grau metalúrgico (SiGM) com baixo nível de impurezas.
Livia Gonçalves Leida Soares   +5 more
doaj   +1 more source

Effects of foliar fertilization of a biostimulant obtained from chicken feathers on maize yield [PDF]

open access: yes, 2018
Due to the important contribution that it makes to human nutrition, maize is one of the most widely-consumed cereals in the world. There is, therefore, high demand for fertilizers that will maintain maize production at both high yield and quality levels.
Paneque Macías, Patricia Isabel   +3 more
core   +1 more source

Determination of Lipoxygenase Activity in Cereals Grains Using a Silver Nanoparticles Assay

open access: yesJournal of Chemistry, 2015
A spectrophotometric method based on the use of silver nanoparticles is presented for the determination of lipoxygenase activity in cereal grains.
Raybel Muñoz   +4 more
doaj   +1 more source

SINTESE DA FASE SODALITA COM O USO DO CAULIM DA REGIÃO BORBOREMA-SERIDÓ (RN/PB) ATIVADO TERMICAMENTE

open access: yesHolos, 2012
A fase mineral sodalita foi obtida com sucesso a partir de reações hidrotérmicas com o uso de caulim proveniente da região Borborema-Seridó (RN/PB), hidróxido e carbonato de sódio.
Cássia Guerra Marques Santos   +6 more
doaj   +1 more source

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