Melamine
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Strength and Stiffness of Cross Laminated Timber (CLT) panels produced with Pinus and Eucalyptus: experimental and analytical comparisons
ABSTRACT The CLT is a building material that comes mainly used in Europe where it was developed. Lightweight, sturdy and eco-friendly, this material has become one of the most important constructive methods in the world. CLT are panels formed by layers of wood glued to each other orthogonally, always in odd numbers, symmetrical with respect to the central la
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Strength and Stiffness of Cross Laminated Timber (CLT) panels produced with Pinus and Eucalyptus: experimental and analytical comparisons
ABSTRACT The CLT is a building material that comes mainly used in Europe where it was developed. Lightweight, sturdy and eco-friendly, this material has become one of the most important constructive methods in the world. CLT are panels formed by layers of wood glued to each other orthogonally, always in odd numbers, symmetrical with respect to the central la
Matéria (Rio J.). Publicado em: 10/06/2019
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3. Experimental bedforms by saline density currents
Abstract Bedforms are sedimentary features that can be generated on the seafloor by the interaction between density currents and mobile beds. Developing knowledge about the hydraulic and sedimentary processes involved during these events is in the interest of research groups and oil companies. Because of the magnitude of the density currents in its natural e
Braz. J. Geol.. Publicado em: 20/05/2019
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4. Rapid and Highly Sensitive Determination of Melamine in Different Food Samples by Corona Discharge Ion Mobility Spectrometry after Dispersive Liquid-Liquid Microextraction
In this work, for the first time, a highly sensitive method based on dispersive liquid-liquid microextraction coupled with positive corona discharge ion mobility spectrometry as a fast and inexpensive technique has been evaluated for the direct determination of melamine. The effective parameters influencing the microextraction efficiency, such as pH, the pro
J. Braz. Chem. Soc.. Publicado em: 2016-09
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5. Relation of transverse air permeability with physical properties in different compositions of sugarcane bagasse particleboards
Studies concerning the production of particleboards with sugarcane bagasse as an alternative fibrous material have been carried out as an attempt to provide a sustainable and viable destination for this residue. This work aimed to evaluate the influence of several processing variables related to the microstructure of sugarcane bagasse particleboards (mat typ
Mat. Res.. Publicado em: 22/11/2012
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6. Controle acústico híbrido da perda de transmissão sonora / Hybrid acustic control of sound transmission loss
The control of transmission loss through panels is a problem that has attracted the attention of automotive, aeronautical and aerospace industries. The passive noise control strategies used for this purposed does not have high efficiency in all audible spectrum, although it consists in a robust solution, it is not effective in low frequency absorb (below 1kH
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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7. Membranas de peneira molecular de carbono obtidas pela pirólise de poli(imidas) ramificadas / Carbon molecular sieves obtained from branched poly(imide) pyrolysis
Nesse trabalho obtiveram-se membranas de poli(imida) ramifricada com tamanho de poro ajustável usando melamina como agente de ramificação e indutor da formação de poros. Estas poli(imidas) foram sulfonadas usando-se ácido sulfúrico concentrado eficazmente. Finalmente, obtivemos membranas de carbono molecular por pirólise sob atmosfera inerte das poli
Publicado em: 2010
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8. Filmes de nanopartículas de dióxido de titânio com undecatungstofosfatomanganês(melamina) e sua reatividade frente à atrazina / Films of titanium oxide nanoparticles containing the complex undecatungstophossphatemanganese(melamine) and its reactivity to atrazine
Neste trabalho buscou-se produzir filmes de nanopartículas de dióxido de titânio e de nanopartículas de dióxido de titânio contendo o complexo sintetizado undecatungstofosfatomanganês(melamina) suportados em cela tubular de vidro borossiliacato e testar sua reatividade como fotocatalisadores frente à atrazina. Os ensaios de fotodegradação da atrazi
Publicado em: 2010
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9. Avaliação do comportamento reológico de pastas de cimento para poços de petróleo com adição de plastificantes
The isolation of adjacent zones encountered during oilwell drilling is carried out by Portland-based cement slurries. The slurries are pumped into the annular positions between the well and the casing. Their rheological behavior is a very important component for the cementing process. Nowadays, several alternative materials are used in oilwell cementing, wit
Publicado em: 2006
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10. Melamine Deaminase and Atrazine Chlorohydrolase: 98 Percent Identical but Functionally Different
The gene encoding melamine deaminase (TriA) from Pseudomonas sp. strain NRRL B-12227 was identified, cloned into Escherichia coli, sequenced, and expressed for in vitro study of enzyme activity. Melamine deaminase displaced two of the three amino groups from melamine, producing ammeline and ammelide as sequential products. The first deamination reaction occu
American Society for Microbiology.
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11. MECHANISM OF CHEMICAL MUTAGENESIS IV. : Reaction between Triethylene Melamine and Nucleic Acid Components
Lorkiewicz, Z. (University of Wisconsin, Madison), and Waclaw Szybalski. Mechanism of chemical mutagenesis. IV. Reaction between triethylene melamine and nucleic acid components. J. Bacteriol. 82: 195–201. 1961.—Triethylene melamine interacts primarily with phosphorylated intracellular deoxyribonucleic acid (DNA) precursors and not with DNA. It was found
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12. Trypanocidal Activity of Melamine-Based Nitroheterocycles
A series of nitroheterocyclic compounds were designed with linkages to melamine or benzamidine groups that are known substrates of the P2 aminopurine and other transporters in African trypanosomes of the brucei group. Several compounds showed in vitro trypanotoxicity with 50% inhibitory concentrations in the submicromolar range. Although most compounds inter
American Society for Microbiology.