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Antimicrobial activity of propolis nanoparticles against some common meat conta...
Alves, Henrique Cezar; Martins, Joana; Sousa, Cristina P.; Bernardes-Filho, Rubens; Teixeira, J. A.; Vicente, A. A.Raw meat is a highly perishable product that requires a great amount of care, from its handling to the conservation conditions at low temperatures. The reduction of microbial proliferation in meat is necessary to achieve an increase of shelf life, food safety, while maintaining product features. For this reason, a technology based on natural antimicrobial agent may offer a potential alternative to protect and ...
pH effect in aquatic fulvic acid from a Brazilian river
Saab,Sérgio da Costa; Carvalho,Eduarda R.; Bernardes Filho,Rubens; Moura,Márcia R. de; Martin-Neto,Ladislau; Mattoso,Luiz Henrique C.Studies of the morphological behavior of fulvic acids were carried out using the Atomic Force Microscopy technique together with zeta Potential techniques and fluorescence spectroscopy. Results showed that the aquatic fulvic acid (AFA) of a Brazilian River changed its morphology when the AFA aqueous solution had its pH changed. In acid pH the morphology is granular forming 10-55 nm high agglomerates. In alkalin...
Estudo de métodos de aumento de resolução de espectros de FTIR para análise de ...
Forato,Lucimara A.; Bernardes Filho,Rubens; Colnago,Luiz A.The FTIR spectroscopy has been used to quantify the secondary structures of proteins, using amide I band (1600 - 1700 cm-1). The resolution enhancement methods have been used to resolve the individual components of this band that correlate to the secondary structure. In this paper we discuss the methods of derivative, Fourier deconvolution and fitting with simulated spectra. The results shows that they have ser...
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