A HPLC method for simultaneous determination of 25 phenolic compounds in grape juice was optimized, validated and applied in the characterization of juices produced in São Francisco Valley (SFV), Brazil. The performance characteristics of the method were established by assays with standard solutions of phenolic compounds, spiked and unspiked samples. Linearity, matrix effects, trueness, precision, detection and quantification limits were evaluated. Linearity was demonstrated in the concentration ranges tested for all phenolic compounds. Significant matrix effects were not identified for the studied compounds. Mean recoveries ranged from 86.18 to 106.50%, demonstrating no lack of trueness. Precision of the method was confirmed for the 25 phenolic compounds, with acceptable repeatability relative standard deviations (from 0.71 to 9.24%) and within-reproducibility relative standard deviations (from 1.34 to 9.26%) for unspiked and spiked samples. The theoretical limits of detection and quantification of the method varied from 0.001 to 0.19 μg mL −1 and 0.003 to 0.37 μg mL −1 , respectively. The results of the validation process showed that the proposed method is fitness for purpose. This method was able to identify simultaneously 25 phenolic compounds and had advantages such as low consumption of solvents and easy sample preparation. The phenolic profile of the grape juices from SFV varied according the grape cultivar. Phenolics of the anthocyanins and tannins class predominated in red grape juices, while in white grape juice phenolic acids and tannins were found at high concentrations.

The pulsed vacuum osmotic dehydration (PVOD) promotes more homogeneous concentration profiles in the product and quality improvement of several fruits. The objective of this work was to study the drying of plums submitted to treatments of plants manure with KCl and PVOD (5'' c.a., 10 min). Experimental planning was done with the following independent variables: doses of KCl (400, 700 and 1000 g ⁄ plant), concentration of sucrose solution (40; 50 and 60 ºBrix) and drying temperature (50, 60 and 70C). The tested variables were: color, shrinkage, visual quality and rehydration. Temperature leads to a skin browning at fruit pulps and lower visual quality. The treatment with KCl leads to final products with lower moisture content. The higher the values of all the independent variables, the lower the shrinkage and the rehydration capacity. Plums submitted to convective drying with previous PVOD promote a new product with good visual quality and satisfactory shrinkage.

Purpose Excessive sodium intake is associated with several diseases. Accordingly, several measures, including microparticulate salt, have been adopted to reduce the salt contents of food products. However, no studies have reported the effectiveness of microparticulate salt in semisolid and liquid products. Accordingly, the purpose of this paper is to evaluate the application of microparticulate salt to reduce sodium contents in semisolid products. Design/methodology/approach The optimal salt content to be added in butter was defined by the just-about-right-scale test. Butter samples were prepared using microparticulate salt to achieve 25, 50 and 75 per cent reductions in conventional salt concentrations. Multiple comparison tests were performed to evaluate sample taste. Findings The ideal concentration of conventional salt to be added to butter was 2.16 per cent. Discriminative tests showed that samples with 25 and 75 per cent salt reduction showed significant differences (p ⩽ 0.05) compared with butter prepared at the ideal salt content, whereas the sample with 50 per cent salt reduction had no significant difference (p > 0.05). Thus, microparticulate salt showed higher salting power than conventional salt. These results indicated the effectiveness of microparticulate salt in the preparation of semisolid products with sodium reduction. Research limitations/implications More detailed studies about the reduced-sodium butter shelf life are necessary to verify the microparticulate salt application in the product preparation. Moreover, microparticulate salt application in semisolid and liquid products elaboration must be more investigated to better elucidate its practicability of reducing sodium content in these kinds of products. Therefore, researchers are encouraged to test the proposed propositions further. Practical implications Microparticulate salt has been successfully applied to reduce sodium in solid products, being added to the finished product surface. However, there are no studies that report its effectiveness in semisolid and liquid products, such as the butter, in which the salt is added during the product preparation. Thus, this research provides new scientific information to the food industry and research fields, to expand the knowledge of reduced-sodium products development using microparticulate salt with sensory quality. Originality/value No studies have evaluated the application of microparticulate salt for semisolid product preparation. Therefore, the findings will support the development of healthy products.

A relação entre a aceitabilidade de alimentos e seus teores lipídicos favoreceu a descoberta de um sexto gosto básico, o oleogustus, que é despertado pelos ácidos graxos de cadeia não esterificada do tipo longa e são os responsáveis pelo verdadeiro gosto de gordura. O entendimento da percepção do oleogustus por diferentes indivíduos pode contribuir para o desenvolvimento de produtos alimentares, para a prática clínica e políticas de saúde pública. Diante disso, o objetivo deste trabalho foi avaliar a preferência sensorial pelo oleogustus por indivíduos de diferentes estados nutricionais, por meio da degustação de hambúrguer misto adicionado de diferentes concentrações de gordura, bem como identificar os fatores que influenciam o consumo de óleos e gorduras. Os hambúrgueres foram avaliados por meio de um teste de escala do ideal por 205 provadores divididos em três grupos de indivíduos: baixo peso, eutróficos e sobrepeso/obesidade. Para a análise dos dados foi utilizado o método de análise de correspondência múltipla e regressão linear simples. Os resultados demonstraram que a preferência por carnes gordurosas foi predominante no grupo de sobrepeso/obesidade, assim como o método de cocção mais utilizado por eles foi o de fritura por imersão. Este grupo também apresentou as maiores frequências de consumo diário e semanal de alimentos gordurosos ricos em gordura saturada e trans. A concentração ideal de gordura perceptível pelos grupos baixo peso, eutrófico e sobrepeso/obesidade foram de: 1,68%, 14,32% e 15,34%, respectivamente. Dessa forma, os indivíduos com sobrepeso/obesidade possuem maior preferência por alimentos gordurosos e pelo oleogustus quando comparado com os outros grupos.

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