Tyrosinase
Mostrando 13-24 de 207 artigos, teses e dissertações.
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13. Heat Shock Protein Hspa5 Interacts with and Protects Tyrosinase Activity
In this study, heat shock protein, Hspa5 was cloned, expressed and purified subsequently confirmed that it interacted with the tyrosinase (TYR) in vitro. Then, using the crystal structure of the homologous protein from the bacteria as a template, a homology model of human TYR was constructed. This model was further applied to investigate the molecular dockin
Braz. arch. biol. technol.. Publicado em: 2015-08
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14. BIOSSENSOR ELETROQUÍMICO BASEADO NA ENZIMA TIROSINASE PARA A DETERMINAÇÃO DE FENOL EM EFLUENTES
AbstractThis work describes the development of a biosensor based on the tyrosinase enzyme (Tyr) for the determination of phenol (PHEN) in laboratory effluent samples derived from ammoniacal nitrogen analysis of the water samples from the Muquém dam in the city of Cariús, CE, using square-wave voltammetry (SWV). The electrode modification consisted of the i
Quím. Nova. Publicado em: 2015-08
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15. A new enzymatic process for the treatment of phenolic pollutants
This work aimed to develop a new economic enzymatic process to treat the phenolic pollutants using pure tyrosinase in stirred vessel and adopting temperature (T), pH, rotational speed (N), initial phenol (C P,o) and enzyme (C T) concentrations as independent variables. Experimental data of the residual phenol concentration (C P) were used to calculate the ox
Braz. arch. biol. technol.. Publicado em: 2013-08
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16. Atividades biológicas dos óleos essenciais de Endlicheria citriodora, uma lauraceae rica em geranato de metila
The essential oils of branches and leaves of Endlicheria citiodora were obtained by hydrodistillation and analysed using GC-FID, GC-MS and both NMR 13C and ¹H, resulting in the identification of methyl geranate as major constituent (93%) in both oils. Cytotoxicity, tyrosinase-inhibition and antioxidant activities were studied and characterized. High antioxi
Quím. Nova. Publicado em: 2013
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17. Efeito de α-MSH sobre a expressão gênica de rodopsina, tirosinase e do receptor de α-MSH, subtipo MC1R, em melanócito B16 de Mus musculus / α-MSH effects on rhodopsin, tyrosinase and MC1R genes in B16 Mus musculus melanocytes
A coloração dos vertebrados deve-se a presença de pigmentos, sintetizados e/ou armazenados em células denominadas células pigmentares cutâneas. A mudança de cor nos vertebrados é principalmente regulada por α-MSH e uma família de enzimas melanossômicas, que incluem tirosinase e as proteínas relacionadas à tirosinase 1 e 2 (TRP-1 e TRP-2, re
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
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18. Desenvolvimento de biossensores utilizando nanotubos de carbono e nanopartículas de ouro / Development of biosensors using carbon nanotubes and gold nanoparticles
First, a glassy carbon electrode modified with functionalized carbon nanotubes (CNTs) and glucose oxidase was proposed. Cyclic voltammetry of GOx immobilized onto the surface of CNTs showed a pair of well-defined redox peaks, which corresponds to the direct electron transfer of GOx, with a formal potential of -0.418 V in 0.1 mol L-1 phosphate buffer solution
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/06/2012
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19. Molecular characterization of the polyphenol oxidase gene in lulo (Solanum quitoense Lam.) var. Castilla
Lulo (Solanum quitoense Lam.) is an exotic fruit from the Andes Mountains with a high export potential. However, the browning that is produced during harvest and the postharvest processes alters the organoleptic and nutritional properties of this fruit, which has made its management as a fresh fruit difficult. The browning processes are regulated by the enzy
Braz. J. Plant Physiol.. Publicado em: 2012-12
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20. Influence of rosmarinic acid and Salvia officinalis extracts on melanogenesis of B16F10 cells
Melanin is a photoprotective skin pigment, and pathologies characterized by hypo or hyperpigmentation are common. New compounds that regulate melanogenesis are, therefore, opportune, and many natural products with this property, as polyphenols, have been described. Salvia officinalis L., Lamiaceae, is a widely used food spice that contains high amounts of ph
Rev. bras. farmacogn.. Publicado em: 22/11/2012
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21. Mushroom tyrosinase inhibitory activity and major fatty acid constituents of Amazonian native flora oils
Com o intuito de se tratar problemas dermatológicos de hiperpigmentação, há uma tendência mundial no desenvolvimento de cosméticos que possuam propriedades despigmentantes, os quais agem inibindo a biossíntese de melanina. O objetivo deste trabalho foi avaliar in vitro a atividade de inibição da tirosinase de cogumelo de cinco óleos de plantas nati
Braz. J. Pharm. Sci.. Publicado em: 2012-09
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22. Dialkylphosphorylhydrazones as potent tyrosinase inhibitors
Dezenove dialquilfosforilidrazonas com diferentes substituintes no anel aromático foram avaliadas como inibidores potenciais de tirosinase, que poderiam ser usadas como agentes eficientes no controle de desordens de pigmentação. A atividade inibitória foi medida através de uma modificação do método de UV-Vis de Patil e Zucker. Os ensaios foram realiz
Journal of the Brazilian Chemical Society. Publicado em: 2012-05
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23. Production and characterization of tyrosinase activity in Pycnoporus sanguineus CCT-4518 crude extract
Tyrosinase is an enzyme of industrial interest. The production and characterization of tyrosinase from P. sanguineus CCT-4518 were investigated. The selection of inductors, luminosity influence, inoculum size and type of culture medium on the production of tyrosinase and the effect of inhibitors on enzyme activity were performed. Optimum conditions for intra
Brazilian Journal of Microbiology. Publicado em: 2012-03
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24. Estudo da remoção de fenóis de soluções aquosas através da adsorção em quitosana, degradação enzimática por tirosinase e imobilização de tirosinase em matriz de quitosana / Study of the removal of phenols from aqueous solution through adsorpition by quitosan by tyrosinase enzyme degradetion and inmobilization of tyrosinase in chitosan matrix
This paper presents the study of biotechnology processes for the removal of pHenol from aqueous solution in batch reactor in 3 separate cases (A), (B) and (C) respectively. As they adsorption of pHenols from aqueous solutions on chitosan, enzymatic degradation of pHenols by tyrosinase in aqueous solution and adsorption / degradation of pHenols in aqueous sol
Publicado em: 2010