Ctab
Mostrando 13-24 de 173 artigos, teses e dissertações.
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13. Effects of the Structure and Composition of Montmorillonite on the Dimerization of Unsaturated Fatty Acids
The effects of structure and composition of different montmorillonites on their catalytic performance in the dimerization of unsaturated fatty acids were investigated. The dimerization reaction was performed at 240 ºC for 3 h, with montmorillonite as catalyst, and LiCl as the co-catalyst. The results showed that the specific surface areas of the different m
J. Braz. Chem. Soc.. Publicado em: 2018-07
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14. Ausência de correlação entre espécies de microfungos e método de controle químico de Atta tratadas com iscas tóxicas
RESUMO: Atta sexdens rubropilosa (cortadeira de folha) possui associação simbiótica com fungos e interação negativa com outros fungos devido ao parasitismo do fungo cultivado pelas formigas. Quando colônias da formiga cortadeira de folhas são submetidas ao tratamento com iscas tóxicas, diversas espécies de fungos surgem dentro da colônia, podendo c
Cienc. Rural. Publicado em: 21/05/2018
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15. Molecular Dynamics Simulations of Cetyltrimethylammonium Bromide (CTAB) Micelles and their Interactions with a Gold Surface in Aqueous Solution
Surfactants are molecular structures with remarkable physicochemical properties and applications. Most of their characteristics are due to their ability to promote aggregation and interactions with different interfaces. The scarcity of theoretical studies dedicated to evaluating the forces involved in these interactions prompted us to propose other models ca
J. Braz. Chem. Soc.. Publicado em: 2018-01
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16. Molecular And 3D-Structural Characterization Of Fructose-1,6-Bisphosphate Aldolase Derived From Metroxylon Sagu
ABSTRACT Fructose-1,6-bisphosphate aldolase (FBAld) is an enzyme that catalyzes the cleavage of D-fructose-1,6-phosphate (FBP) to D-glyceraldehyde-3-phosphate (G3P) and dihydroxyacetone phosphate (DHAP), and plays vital role in glycolysis and gluconeogenesis. However, molecular characterization and functional roles of FBAld remain unknown in sago palm. Here
Braz. arch. biol. technol.. Publicado em: 22/06/2017
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17. Cationic Micellar Precipitation for Simultaneous Preconcentration of Benzimidazole Anthelmintics in Milk Samples by High-Performance Liquid Chromatography
A method using micellar precipitation process using cationic surfactant cetyltrimethyl ammonium bromide at ambient temperature was investigated for simultaneous determination of benzimidazoles coupled with high-performance liquid chromatography (HPLC) analysis. The studied benzimidazoles was selected as model compounds including thiabendazole, albendazole, m
J. Braz. Chem. Soc.. Publicado em: 2017-05
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18. Effect of Capping Agent on the Morphology, Size and Optical Properties of In2O3 Nanoparticles
The Indium Oxide (In2O3) nanoparticles were synthesized through Acacia gum mediated method with the surfactants CTAB (Cetyl Trimethyl Ammonium Bromide) and SDBS (Sodium Docecyl Benzene Sulfonate). The characterization of the synthesized In2O3 nanoparticles was carried out by XRD, FTIR, RAMAN, TEM, SEM, EDAX, UV-Vis and PL techniques. TG-DTA analysis was perf
Mat. Res.. Publicado em: 09/01/2017
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19. A Comparative Study on Ag-Doped and Surfactant Assisted MnO2 Prepared by Direct and Pulse Current Electrodeposition on Surgical Grade Stainless Steel as High-Performance Supercapacitor
Direct and pulse current electrodeposition techniques were applied for preparation of novel electro-active manganese oxides. The influences of Ag doping and addition of cetyltrimethylammonium bromide (CTAB) on electrochemical properties were discussed. The morphology and structure of the electrodes are studied by different techniques including field emission
J. Braz. Chem. Soc.. Publicado em: 2017-01
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20. Kaolinite removal from bauxite by flotation
Abstract This paper presents a potential condition to separate kaolinite through flotation when it is present in bauxite ore. This research anticipates a Brazilian industry requirement, considering the tendency towards the need for aluminosilicates removal from bauxite ores, as has already occurred in China. Kaolinite is the most abundant aluminosilicate, an
REM, Int. Eng. J.. Publicado em: 2016-09
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21. Extraction of Trypanosoma cruzi DNA from food: a contribution to the elucidation of acute Chagas disease outbreaks
Abstract: INTRODUCTION: Before 2004, the occurrence of acute Chagas disease (ACD) by oral transmission associated with food was scarcely known or investigated. Originally sporadic and circumstantial, ACD occurrences have now become frequent in the Amazon region, with recently related outbreaks spreading to several Brazilian states. These cases are associate
Rev. Soc. Bras. Med. Trop.. Publicado em: 2016-04
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22. Extracting DNA of nematodes communities from Argentine Pampas agricultural soils
Foram examinadas quatro estratégias (Tris / EDTA, dodecilsulfato de sódio, resina Chelex 100 e brometo de cetiltrimetilamónio -CTAB-) para a extração de ácido nucleico (DNA) das comunidades de nematóides. Os nematóides foram isolados a partir de uma área agrícola sob manejo diferente num experimento de rotação de culturas de longo prazo, durante
An. Acad. Bras. Ciênc.. Publicado em: 2015-06
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23. Extraction and Separation of Molybdenum by Using Homogeneous Liquid-Liquid Microextraction via Flotation Assistance
Homogeneous liquid-liquid microextraction via flotation assistance (HLLME-FA) was investigated for the extraction of molybdenum from the water samples. Alizarin Red S and cetyl trimethylammonium bromide (CTAB) were used as a complexing ligand and ion-pairing reagent, respectively. The enriched analyte in the floated organic phase was determined by electrothe
J. Braz. Chem. Soc.. Publicado em: 2015-05
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24. Aqueous Micelles as Catalytic Nanoreactors for Dephosphorylation Reactions
A reação entre um novo derivado de imidazol, 3,5-bis((1H-imidazol-1-il)metil)anilina (BIm), e o triéster de fosfato dietil 2,4-dinitrofenil fosfato (DEDNPP), que procede por um mecanismo SN2(P), é substancialmente acelerada em presença do surfactante catiônico brometo de cetiltrimetrilamônio (CTAB) e do surfactante aniônico dodecil sulfato de sódio
J. Braz. Chem. Soc.. Publicado em: 2014-12