Tecnologia de Alimentos
URI permanente desta comunidadehttps://locus.ufv.br/handle/123456789/11783
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Resultados da Pesquisa
Item Morphological characterization of pequi extract microencapsulated through spray drying(International Journal of Food Properties, 2017) Alves, Aline Inacio; Rodrigues, Marcela Zonta; Pinto, Marcos Roberto Moacir Ribeiro; Vanzela, Ellen Silva Lago; Stringheta, Paulo César; Perrone, Ítalo Tuler; Ramos, Afonso MotaThis objective of this work was to produce spray-drying microencapsulated carotenoid extracts from pequi pulp using maltodextrin and gum arabic and to evaluate the influence of drying temperature on the physicochemical properties of microencapsulated extracts. Emulsions were spray-dried into powders at 150°C, 170°C, and 190°C. Morphological and physicochemical properties of the obtained product were investigated. The temperature of 190°C was that which best conserved the carotenoids and had the best observed solubility. The microspheres produced by spray drying presented an average size of 20 µm. Neither morphological nor color differences were observed for particles dried at different temperatureItem FT-Raman and chemometric tools for rapid determination of quality parameters in milk powder: Classification of samples for the presence of lactose and fraud detection by addition of maltodextrin(Food Chemistry, 2015-09-15) Rodrigues Júnior, Paulo Henrique; Oliveira, Kamila de Sá; Almeida, Carlos Eduardo Rocha de; Oliveira, Luiz Fernando Cappa De; Stephani, Rodrigo; Pinto, Michele da Silva; Carvalho, Antônio Fernandes de; Perrone, Ítalo TulerFT-Raman spectroscopy has been explored as a quick screening method to evaluate the presence of lactose and identify milk powder samples adulterated with maltodextrin (2.5–50% w/w). Raman measurements can easily differentiate samples of milk powder, without the need for sample preparation, while traditional quality control methods, including high performance liquid chromatography, are cumbersome and slow. FT-Raman spectra were obtained from samples of whole lactose and low-lactose milk powder, both without and with addition of maltodextrin. Differences were observed between the spectra involved in identifying samples with low lactose content, as well as adulterated samples. Exploratory data analysis using Raman spectroscopy and multivariate analysis was also developed to classify samples with PCA and PLS-DA. The PLS-DA models obtained allowed to correctly classify all samples. These results demonstrate the utility of FT-Raman spectroscopy in combination with chemometrics to infer about the quality of milk powder.