Elemental Analysis Chn
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Certificação de beta-N-metil-amino-alanina: um modelo para produção de materiais de referência de substâncias orgânicas obtidas in-house / Certification of beta-N-methyl-amino-alanine: a model for in-house preparation of reference materials of organic substances
Materiais de Referência (MR) de substâncias químicas têm ampla aplicação, sobretudo na área analítica, servindo de referência para validação de métodos, calibração de instrumentos e controle de qualidade, estabelecendo a comparabilidade de resultados analíticos em escala global e permitindo a transferência da exatidão entre métodos, laborat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2011
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14. Oligomerização de olefinas leves catalisada por complexos contendo ligantes B-diimina heterogeneizados em sílica
This work describes ¿-diimine ligands synthesis and the corresponding nickel complexes, homogeneous and heterogeneized, its catalytic application in ethylene oligomerization. Initially held the ¿-diimine ligands synthesis with different substituents in the aromatic ring. These ligands were characterized by CHN elemental analysis, IR, UV-Vis and 1H NRM. Fro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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15. Síntese e caracterização de argilas organofílicas contendo diferentes teores do surfactante catiônico brometo de hexadeciltrimetilamônio
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. The clays were characterized by low angle x-ray diffraction (XRD), scanning electron microscope (SEM), infrared with
Química Nova. Publicado em: 2011
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16. Novo material híbrido nanoestruturado constituído de cloreto de amoniopropil silsesquioxano e sílica
In this study it was used the sol-gel method to obtain a set of silica based hybrid material samples, containing the cationic amoniumpropyl group bonded to the matrix in a pendant way. The set of samples was characterized using X-ray diffraction, transmission electron microscopy, 29Si nuclear magnetic resonance, small angle X-ray scattering, thermogravimetri
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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17. SÍNTESE, ESTUDOS ESPECTROSCÓPICOS E ESTRUTURAIS DE COMPLEXOS CONTENDO O LIGANTE 4,4- BIPIRIDINA, O ÂNION BARBITURATO E OS ÍONS METÁLICOS DA PRIMEIRA SÉRIE DE TRANSIÇÃO (Fe2+, Co2+, Ni2+, Cu2+ e Zn2+)
This work describes the synthesis and characterization of five new transition metal complexes of general formula MB2Bipy.10H2O (where M = Fe2+, Co2+, Ni2+, Cu2+ and Zn2+, B is barbiturate anion and Bipy is 4,4-bipyridine) . Several physical and spectroscopical techniques were used to characterize the compounds, such as elemental analysis (CHN), thermal analy
Publicado em: 2009
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18. Syntheses, Characterization and Chemical Reactivity of Chloro and Nitrosyl Complexes of trans-Tetrakispyridines of Ruthenium / Síntese, caracterização e reatividade química de complexos de cloro e nitrosil de trans-Tetrakispiridina de rutênio
The complexes trans-[RuCl2(L)4] (L = py, isn, 4-acpy e 3-acpy), trans-[RuCl(NO)(L)4](PF6)2 (L = py, isn e 4-acpy), trans-[Ru(OH)(NO)(py)4](PF6)2, trans-[RuCl(NO)(py)4]Cl23H2O, trans-[Ru(OH)(NO)(py)4]Cl2, cis-[RuCl2(DMSO)4], trans-[Ru(NO2)2(py)4], trans-[RuCl(NO2)(py)4], trans-[RuCl(acn)(py)4](PF6) and the reduced complex trans-[RuCl(NO)(py)4]I were synthesiz
Publicado em: 2009
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19. Ditiocarbamatos derivados do glicoluril, ácido úrico, ácido parabânico e hidantoína: compostos de coordenação e uso como inibidores de corrosão do bronze
This thesis work is about dithiocarbamates compounds, their synthesis, study and application as corrosion inhibitors. The dithiocarbamates herein studied were synthesized from four substances: glycoluril, uric acid, parabanic acid and hydantoin. The pro-ligands were synthesized through reaction with CS2 and NaOH, characterized via elemental analysis (CHN) an
Publicado em: 2008
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20. Determination of CHN content in energetic binder by MIR analysis
Azide polymers samples were analyzed by FT-MIR in order to develop a quantitative methodology to determine the C, H and N content in energetic polymers used in propellants. The elemental analysis data were used as reference. The FT-MIR results show a good agreement with CHN analysis. A good linear relationship was obtained suggesting that the methodology dev
Polímeros. Publicado em: 2007-03
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21. Sintese e Caracterização de Derivados da Celulose Modificada com Anidridos Orgânicos : adsorção e Termodinamica de Interação com Cations Metalicos / Synthesis and characterization of cellulose derivatives with organic anhydrides : adsorption and interation thermodynamic metallic cations
Cellulose is a widely available biopolymer in nature and its draws considerable chemical interest due its various useful applications. The polysaccharide modification is primarily based on their hydroxyl group reactivity, which determines the carbohydrate chemistry and their related structures. The chemical modification of cellulose was carried out in a solv
Publicado em: 2007
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22. Rutheniumporphyrins: synthesis and application as catalysis in oxidation reactions of ciclohexane, adamantane and Z-ciclooctane. / Rutenioporfirinas: síntese e aplicação como catalisadores de reações de oxidação de ciclo-hexano, adamantano e Z-cicloocteno.
The porphyrin ligands, mesotetraphenyl-21H, 23Hporphyrin, meso-tetrakis(2-bromophenyl)-21H, 23H-porphyrin, meso-tetrakis(4- bromophenyl)-21H, 23H-porphyrin, meso-tetrakis(2-chlorophenyl)-21H, 23Hporphyrin, meso-tetrakis(4-chlorophenyl)-21H, 23H-porphyrin and meso-tetrakis(2,6- dichlorophenyl)-21H, 23H- porphyrins, were synthesized by the condensation reactio
Publicado em: 2006
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23. Modificação do polipropileno com o poli(estireno-B-butadieno-B-estireno)
The aim of this work was to characterize physically, chemically and chromatographically HPLC stationary phases prepared with silica modified with zirconium titanium and aluminum oxides and having polymethyloctylsilane, PMOS, immobilized onto the surfaces. The physical tests used were X Ray Fluorescence (XRF), X Ray Absorption (XAS), X Ray Diffraction (XRD),
Publicado em: 2004
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24. Caracterizações fisicas, quimicas e cromatograficas de silicas modificadas por camadas de oxidos metalicos
The aim of this work was to characterize physically, chemically and chromatographically HPLC stationary phases prepared with silica modified with zirconium titanium and aluminum oxides and having polymethyloctylsilane, PMOS, immobilized onto the surfaces. The physical tests used were X Ray Fluorescence (XRF), X Ray Absorption (XAS), X Ray Diffraction (XRD),
Publicado em: 2004