Nesta pesquisa teve-se como objetivo o desenvolvimento de uma bebida láctea fermentada à base de soro de queijo mussarela e polpa de umbu. Foram avaliadas as características físico-químicas e físicas a aceitação sensorial, além do efeito da temperatura e da concentração de soro sobre a massa específica das bebidas que foram formuladas variando-se, somente, a concentração de soro (20%, 40%, 60% e 80%). A partir dos resultados obtidos e das análises estatísticas verificou-se que os valores para as características físico-químicas e aceitação sensorial não apresentaram diferença significativa entre os tratamentos 20%, 40% e 60% (P > 0,05). A partir dos resultados obtidos das análises físico-químicas e sensorial pode-se concluir que a melhor bebida foi aquela que apresentou concentração de soro de 60%, devido a utilização de maior quantidade de soro. Para a análise da influência da concentração de soro e temperatura sobre a massa específica foi ajustado um modelo linear múltiplo sem interação dos parâmetros, com coeficiente de determinação satisfatório. Palavras-chave: densidade, calor específico, resíduo, aceitação sensorial. ELABORATION AND CHARACTERIZATION OF A DAIRY FERMENTED DRINK PRODUCED WITH UMBU (Spondias tuberosa sp.

View related articles View Crossmark data Citing articles: 1 View citing articles Application of a multiplex polymerase chain reaction (mPCR) assay to detect fraud by substitution of bovine meat cuts with water buffalo meat in Northern Brazil

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The seasons influence the production of buffalos' milk. Because of this, the producers may produce a mixture of buffalo and bovine milk during cheese production in periods of low production. Therefore, the present work aimed to investigate fraud in buffalo cheese and the relationship between seasonality and different physicochemical properties of buffalo cheeses produced and marketed in eastern Amazonia. We obtained commercial samples of buffalo cheese during two Amazonian climatic periods from commercial points of Marajó-Pará, Brazil. After collection, there were lipid, protein, ash, and humidity analyses. Determination of carbohydrates and energy values was also performed for the nutritional characterization of samples, as well as for mPCR analysis to detect buffalo and/or bovine DNA. DNA extraction protocol of the samples was standardized and two pairs were used for the mPCR reaction, amplifying fragments of approximately 220 bp for Bubalus bubalis DNA and 346 bp fragments for Bos taurus DNA. Among the samples acquired in the rainy season, we observed that 33% were inadequately labeled, indicating fraud from cow's milk incorporation and fraud from substitution of raw material. From the nine samples obtained in the dry season, all the samples showed cow's milk incorporation fraud. The highest fraud rate coincided with the period of low milk production from buffalo and there was a difference in composition between fraudulent and non-fraudulent cheeses. Therefore, seasonality influences increase in cattle milk for the production of buffalo cheese, and this adulteration may decrease the nutritional content of the product.