Sulfonamides
Mostrando 13-24 de 203 artigos, teses e dissertações.
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13. Desenvolvimento de métodos analíticos visando atender aos princípios da química verde na análise de resíduos de medicamentos veterinários em leite bovino / Development of analytical methods to attend the green chemistry principles in the analysis of veterinary medicines in bovine milk
A utilização de medicamentos veterinários é de grande importância na produção animal, porém também pode trazer conseqüências negativas, como a presença de resíduos em alimentos, como o leite bovino. As sulfonamidas são uma classe de antibióticos utilizados no tratamento veterinário e humano, sendo de grande importância sua análise em alimen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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14. Microextraction in packed sorbent for determination of sulfonamides in egg samples by liquid chromatography and spectrophotometric detection
O presente trabalho descreve a aplicação bem sucedida da microextração em sorvente empacotado e cromatografia líquida com detecção de arranjo de diodos (MEPS/LC-DAD) para a determinação simultânea das sulfonamidas (sulfacetamida, sulfadiazina, sulfatiazol, sulfametazina sulfametoxipiridazina e sulfametoxazol) em amostras de ovos. As variáveis MEPS
Journal of the Brazilian Chemical Society. Publicado em: 2011-09
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15. Otimização e validação de método multirresíduo para determinação de sulfonamidas em camarão cultivado por cromatografia líquida de alta eficiência com detecção por UV
This work reports the optimization and method validation for sulfonamides (sulfamethazine, sulfaquinoxaline, sulfadimethoxine and sulfathiazole) in shrimp muscle using HPLC-UV. The sulfonamides were extracted with acetonitrile and acetic acid, and the extract cleaned up with a Strata SCX SPE cartridge prior to analysis. The method presented linearity in the
Química Nova. Publicado em: 2011
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16. Coordenação de metais a antibióticos como uma estratégia de combate à resistência bacteriana
Antibiotic resistance has been growing at an alarming rate and consequently the arsenal of effective antibiotics against Gram-negative and Gram-positive bacteria has dropped dramatically. In this sense there is a strong need to produce new substances that not only have good spectrum of activity, but having new mechanisms of action. In this regard, this paper
Química Nova. Publicado em: 2011
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17. Determination of pKa values of some sulfonamides by LC and LC-PDA methods in acetonitrile-water binary mixtures
As constantes de dissociação de sete sulfonamidas antibióticas, sulfadiazina, sulfatiazol, sulfamerazina, sulfametazina, sulfamonometoxina, sulfadoxina e sulfametoxazol, foram determinadas em diferentes misturas binárias acetonitrila-água (15, 30, 40, 50% (v/v)) usando cromatografia líquida de fase reversa. Um método usando espectros de absorbância n
Journal of the Brazilian Chemical Society. Publicado em: 2010
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18. Diversity of Chromobacterium violaceum isolates from aquatic environments of state of Pará, Brazilian Amazon
The present study intended to characterize the phenotypic and genetic diversity of Brazilian isolates of Chromobacterium violaceum from aquatic environments within the Amazon region. Nineteen isolates showed morphological properties of C. violaceum and the majority grew at 44°C. Low temperatures, in contrast, showed to be inhibitory to their growth, as elev
Memórias do Instituto Oswaldo Cruz. Publicado em: 2008-11
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19. Stability constants and thermodynamic parameters of cadmium complexes with sulfonamides and cephapirin
Stability constant (log beta) and thermodynamic parameters of Cd2+ complexes with sulfonamide and cephapirin were determined by Polarographic technique at pH = 7.30 ± 0.01 and µ = 1.0 M KNO3 at 250°C. The sulfonamides were sulfadiazine, sulfisoxazole, sulfamethaxazole, sulfamethazine, sulfathiazole, sulfacetamide and sulfanilamide used as primary ligands
Eclética Química. Publicado em: 2008
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20. Synthesis, structure and physicochemical properties of zinc and copper complexes based on sulfonamides containing 8-aminoquinoline ligands
Sulfonamides obtained by reaction of 8-aminoquinoline with 4-nitrobenzenesulfonylchloride and 2,4,6-triisopropylbenzenesulfonyl chloride were used to synthesize coordination compounds with CuII and ZnII with a ML2 composition. Determination of the crystal structures of the resulting zinc and copper complexes by X-ray diffraction show a distorted tetrahedral
Química Nova. Publicado em: 2008
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21. DESENVOLVIMENTO DE METODOLOGIA PARA ANÁLISE DE SULFONAMIDAS EM MEL UTILIZANDO CROMATOGRAFIA LÍQUIDA E DETECÇÃO POR ARRANJO DE DIODOS / DEVELOPMENT OF METHODOLOGY FOR ANALYSIS SULFONAMIDES IN HONEY USING LIQUID CHROMATOGRAPHY AND DETECTION DIODE ARRAY
Honey is a natural substance produced by bees and by your nature it is considered a healthy product. Presence of additives and/or preserve agents is not permitted. On apiculture, sulfonamydes are largely used on prevention and control of beehive disease, such as American foulbrood caused by Paenibacillus larvae. A consequence of this practice is the presence
Publicado em: 2008
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22. Síntese de derivados de D-galactose inibidores potenciais de interação lectina-carboidrato
Lectins are proteins involved in carbohydrate recognition and their interaction is important in many natural and pathogenic events, as immunological response, fertilization, embryogenesis, infection and cancer metastasis. Hence, studies aimed at antiadhesion therapy with natural and synthetic mono- or multivalent carbohydrate derivatives show promising resul
Publicado em: 2008
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23. Síntese de amidas e sulfonamidas de beta-D-galactopiranosilamina e beta-lactosilamina e avaliação de suas interações com lectinas de Erythrina cristagalli e de Ricinus communis
We report herein the synthesis of some beta-D-galactopyranosylamine and beta-lactosylamine amides and sulfonamides. The interactions of these compounds with lectins from the seeds of Erythrina cristagalli (LEC) and Ricinus communis (RCA120) were evaluated in a hemagglutination inhibitory activity assay. D-Galactose and lactose were used as reference compound
Química Nova. Publicado em: 2007-10
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24. The interaction between sulfathiazole and cobalt(II): potentiometric studies
Potentiometric studies of sulfathiazole (HST) in the presence and absence of cobalt(II) were performed. Equilibrium constants for the formation of the detected species, [Co(ST)]+ and [Co(ST)(OH)], are reported. UV-Vis spectrophotometric measurements suggest that the coordination Co(II)-sulfathiazole might be through a N atom, which, in agreement with MO calc
Química Nova. Publicado em: 2007-10