Results 1 to 10 of about 156,677 (249)

La zaratita de Cabo Ortegal (A Coruña): historia de su descubrimiento y caracterización actual [PDF]

open access: yesEstudios Geologicos, 2014
La zaratita, Ni3CO3(OH)4.4H2O es uno de los pocos minerales descubiertos en España. Por ser una fase de baja cristalinidad y presentar una composición química variable según los diferentes yacimientos, la International Mineralogical Association (IMA ...
A. La Iglesia   +2 more
doaj   +4 more sources

USE OF AGENTS OXIDANTS/PRECIPITATING PERMANGANATE/ CARBONATE PEROXIDE /UREA FOR SELECTIVE PRECIPITATION OF CERIUM ION [PDF]

open access: yesTecnologia em Metalurgia, Materiais e Mineração, 2014
The separation of mixtures of rare earth elements (REE) is difficult to perform due to the similarities of their chemical and physical properties. Literature report the particular property in Ce ion oxidize in contact with strong oxidizing agents and ...
Flávia Alves Ferreira   +2 more
doaj   +1 more source

A DFT Study of the Reaction of Acrylamide with L-Cysteine and L-Glutathione

open access: yesMolecules, 2022
Thermal processing of certain foods implies the formation of acrylamide, which has been proven to provoke adverse effects on human health. Thus, several strategies to mitigate it have been developed.
Sandra Ramirez-Montes   +4 more
doaj   +1 more source

MULTI-INSTRUMENTAL IDENTIFICATION OF ORPIMENT IN ARCHAEOLOGICAL MORTUARY CONTEXTS [PDF]

open access: yes, 2014
Indexación: Web of Science; Scielo.This paper reports on an unknown yellowish mineral compound found in an archaeological context from Chorrillos cemetery (Calama, Chile) dating to the Early Formative period (800 - 200 B.C.).
ARRIAZA, BERNARDO   +6 more
core   +1 more source

ESTUDO DE BENEFICIAMENTO QUÍMICO E FÍSICO E CARACTERIZAÇÃO DE BAUXITAS DO PARÁ

open access: yesHolos, 2012
As camadas de bauxita cristalizada (BC) e bauxita cristalizada amorfa (BCA) que compõem o perfil geológico do nordeste do Pará foram submetidas às etapas de beneficiamento e adequadas aos ensaios de bancada, sendo submetidas ao estudo da influência do pH
Diego Seixas Gomes Almeida   +5 more
doaj   +1 more source

Evaluation of the Hybrid Membrane of ZnO Particles Supported in Cellulose Acetate for the Removal of Lead

open access: yesMembranes, 2023
Water polluted by discarded heavy metals such as lead is creating a global pollution problem. In this work, adsorption of Pb(II) was realized in batch studies by a hybrid membrane of cellulose acetate with ZnO particles.
Irma Pérez-Silva   +3 more
doaj   +1 more source

Effect of dietary organic and inorganic selenium supplementation on chemical, mineral and fatty acid composition of ostrich meat [PDF]

open access: yes, 2015
This study evaluated the effect of dietary organic and inorganic selenium supplementation on chemical, mineral and fatty acid composition of ostrich meat.
De Smet, Stefaan   +7 more
core   +1 more source

BENEFICIAMENTO DO QUARTZO DE TANHAÇU/BA VISANDO A PREPARAÇÃO DE SILÍCIO GRAU METALÚRGICO DE ALTA PUREZA

open access: yesHolos, 2014
Neste trabalho, as etapas de beneficiamento e de caracterização do quartzo de Tanhaçu/BA foram realizadas com o propósito de utilizá-lo como matéria-prima para a obtenção de um silício grau metalúrgico (SiGM) com baixo nível de impurezas.
Fernanda Arruda Nogueira Gomes Silva   +5 more
doaj   +1 more source

Biocomposites Based on Thermoplastic Starch and Granite Sand Quarry Waste [PDF]

open access: yes, 2019
Granite stone is a by-product of the rock crushing manufacturing. An industrial waste in powder form that causes health problems and environmental pollution. Fine particles fraction can be used as a partial replacement of sand in concrete manufacture. In
Irassar, Edgardo Fabián   +7 more
core   +1 more source

Development of Cellulose Acetate Microcapsules with Cyanex 923 for Phenol Removal from Aqueous Media

open access: yesJournal of Chemistry, 2018
Microcapsules of cellulose acetate with Cyanex 923 were prepared and used in this study for phenol removal from water and synthetic textile wastewater.
Irma Pérez-Silva   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy