Ethylenediamine
Mostrando 1-12 de 168 artigos, teses e dissertações.
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1. Study of the CuII Affinity by Three Chelating Agents of Biological Interest: TPEN, TRIEN and Et2DTC
Copper is an important micronutrient, and it is present in some protein structures, as well as participate in several important biological processes. Due to its importance, some ligands are used and studied like carriers of copper in the biological systems. This work has investigated the affinity of CuII by three ligands of biological interest: N, N, N, N’
J. Braz. Chem. Soc.. Publicado em: 2021-04
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2. SYNTHESIS, CHARACTERIZATION AND EVALUATION OF THE HETEROGENEOUS BASIC CATALYST DAPTS-MCM-41 IN THE INTERESTERIFICATION REACTION OF PALM OIL AND PALM KERNEL OIL BLENDS
Abstract In recent years, the replacement of homogeneous catalysts by heterogeneous catalysts has been investigated as a sustainable alternative technology to obtain different products. In this context, this study investigated the activity of the heterogeneous catalyst DAPTS-MCM-41, obtained from the reaction between the MCM-41 molecular sieve and an organic
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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3. Ammonium excretion, auxin production and effects of maize inoculation with ethylenediamine-resistant mutants of Pseudomonas sp.
ABSTRACT Plant growth-promoting bacteria (PGPB) comprise part of plant microbiome of biotechnological interest due to their potential to decrease the use of agrochemicals in agriculture. Among the commonly found PGPB species, the Pseudomonas genus is known for high competitiveness and efficiency in expressing growth-promotion traits. To increase the contribu
Bragantia. Publicado em: 02/08/2018
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4. Synthesis of Graphene Oxide and Functionalized CNT Nanocomposites Based on Epoxy Resin
ABSTRACT Lately, nanomaterials have been largely studied as reinforcements for epoxy resin. Although their usage is highly promising, the literature has reported some drawbacks regarding the improvement of mechanical properties in nanocomposites. These difficulties are usually due to dispersion of nanomaterials and its adhesion to the polymeric matrix. One a
J. Aerosp. Technol. Manag.. Publicado em: 16/07/2018
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5. Can intra-radicular cleaning protocols increase the retention of fiberglass posts? A systematic review
Abstract The presence of residues within the root canal after post-space preparation can influence the bond strength between resin cement and root dentin when using fiberglass posts (FGPs). Currently, there is no consensus in the literature regarding what is the best solution for the removal of debris after post-space preparation. This systematic review invo
Braz. oral res.. Publicado em: 15/03/2018
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6. The Role that Electrolytes Play in the Synthesis of Water-Soluble CdTe Quantum Dots Prepared at Ambient Temperature
In this work, we have synthesized CdTe quantum dots (QDs) dispersed in an aqueous medium at ambient temperature, and investigated their optical properties. Synthesis of CdTe QDs in the presence of simple amines removed the need for an additional energy source and inert atmosphere, in a simple and inexpensive experimental setup. The use of ammonia or hydrazin
J. Braz. Chem. Soc.. Publicado em: 2017-07
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7. Synthesis of Nano-Pore Size Ag(I)-Imprinted Polymer for the Extraction and Preconcentration of Silver Ions Followed by Its Determination with Flame Atomic Absorption Spectrometry and Spectrophotometry Using Localized Surface Plasmon Resonance Peak of Silver Nanoparticles
Silver ion imprinted polymer (IIP) was synthesized in the presence of Ag(I)-N,N’‑bis(salicylidene)ethylenediamine (salen) complex using 4-vinylpyridine as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as the crosslinker, and 2,2-azobis(isobutyronitrile) (AIBN) as the initiator. The Ag(I)-imprinted polymer (IIP) particles were characteriz
J. Braz. Chem. Soc.. Publicado em: 2015-06
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8. Chemical modification of chitosan in the absence of solvent for diclofenac sodium removal: pH and kinetics studies
Chitosan was modified with acetylacetone and ethylenediamine in the absence of solvent. The new biopolymer obtained from the modification was characterized by elemental analysis and NMR 13C and applied in the removal of diclofenac sodium aqueous solution varying the pH and time. Through elemental analysis was possible to verify a decreasing in C/N relation a
Mat. Res.. Publicado em: 15/04/2014
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9. Preparation and evaluation of magnetic chitosan particles modified with ethylenediamine and Fe(III) for the removal of Cr(VI) from aqueous solutions
The adsorption of Cr(VI) in aqueous solution by magnetic particles of crosslinked chitosan-ethylenediamine-Fe(III) (MPCh-EDA-FeCL) was studied in a batch system. Fe3+ in the MPCh-EDA-FeCL permitted that adsorption of Cr(VI) occurred with maximum efficiency between pH 3 and 11. The maximum adsorption capacity at pH 7.0 was 81.04 mg g-1 at 25 ºC. The adsorpti
Quím. Nova. Publicado em: 2014
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10. Adsorção de CO2 em peneiras moleculares micro e mesoporosas
Microporous molecular sieves of type Y, Beta, ZSM-5, ZSM-12 and ZSM-35, and mesoporous molecular sieves of type MCM-41 and MCM-48, and these sieves modified with triethanolamine and ethylenediamine were obtained and characterized by XRD, FTIR, TGA and nitrogen adsorption. The adsorption tests were performed by the gravimetric method under a stream of CO2 at
Quím. Nova. Publicado em: 2014
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11. Ethylenediamine intercalation in vermiculite of reactive dye Remazol Blue RN using chemometric methods and adsorption. / Intercalação de etilenodiamina em vermiculita e adsorção do corante reativo azul de remazol RN utilizando métodos quimiométricos.
O argilomineral vermiculita foi modificado por intercalação de etilenodiamina (en) em meio ácido. Para isto, foi empregado um planejamento fatorial 24, cujos fatores escolhidos foram: temperatura da reação de intercalação, concentração de en+, tempo de agitação e lixiviação da vermiculita, no total foram obtidas 16 amostras de vermiculita prepar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/08/2012
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12. DESENVOLVIMENTO DE PENEIRAS MOLECULARES MESOPOROSAS DO TIPO MCM-41 E MCM-48 IMPREGNADAS COM AMINAS PARA UTILIZAÇÃO NA ADSORÇÃO DE CO2. / DEVELOPMENT OF TYPE MESOPOROUS MOLECULAR SIEVES MCM-41 AND MCM-48 IMPREGNATED WITH AMINES FOR USE IN ADSORPTION CO2.
O aumento significativo das emissões de dióxido de carbono na atmosfera vem acentuando o efeito do aquecimento global. A busca por fontes energéticas que minimizem as emissões é de grande importância, como também o uso de ações complementares como processos para captura deste gás das principais fontes emissoras. Dentre alguns processos já bem conh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2012