DEALI - Departamento de Alimentos

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/540

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2018 - 201912020 - 20211

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Autor: search.filters.author.Parreiras, Paola MachadoAssunto: search.filters.subject.Phenolic compounds

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
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    Interference of germination on the nutritional composition and antioxidant capacity of black sesame (Sesamum indicum L.).
    (2021) Basso, Ana Carolina Dias; Machado, Pollyana Mara Ribeiro; Chaves, Jaísa Oliveira; Parreiras, Paola Machado; Salierno, Camila Carvalho Menezes
    Purpose – The purpose of this study was to evaluate the effect of black sesame germination on its nutritional composition and antioxidant activity. Design/methodology/approach – Germination occurred at constant temperature and humidity (35 8C and 95 ± 5%) for 72 h. The levels of moisture, protein, lipids, ash, total dietary fibre and fractions, carbohydrates, calories, phenolic compounds and antioxidant capacity were determined. Findings – With germination, there was a significant increase in moisture and protein content, as well as a reduction in the other parameters assessed in terms of nutritional composition. When analysing bioactive compounds, no significant change was found in the content of phenolic compounds; however, there was a reduction in antioxidant capacity according to the three methods tested, which may be related to the characteristics of the grain itself, the conditions used for germination, or even the process of extracting phenolic compounds for analysis. Other conditions for the germination of black sesame using different times and temperatures should be evaluated in future studies. Originality/value – This is an original research article, which has an industrial and health impact by transmitting highly relevant responses on nutrition and food. The novelty of this research is the fact of studying the germination of black sesame on the nutritional composition (moisture, protein, lipids, ash, total dietary fibre and fractions, carbohydrates and calories), levels of phenolic compounds and antioxidant capacity. These results can help improve the procedures adopted by the food industries and also in nutritional conduct, as the germination process leads to a change in the nutritional composition, especially with regard to protein synthesis, which is relevant, once it is an interesting protein option. However, it also brings us responses to reductions in important nutritional compounds.
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    Stability of antioxidant capacity of human milk after freezing and pasteurization.
    (2018) Nogueira, Janaina Aparecida Vieira; Santos, Marina Maximiano de Oliveira; Passos, Maria Cristina; Cunha, Luciana Rodrigues da; Parreiras, Paola Machado; Salierno, Camila Carvalho Menezes
    Pasteurization and freezing are processes used in human milk banks that can affect some of the nutritional and biological properties of human milk. The aim of this study was to evaluate impact of the processing steps adopted by human milk banks on the contents of total phenolic compounds and antioxidant capacity in vitro. Experimental study was realized, in which 40 mL human milk were collected from 8 mothers registered at the Human Milk Bank of Ouro Preto, state of Minas Gerais. Samples were homogenized to form the pool. Human milk was divided into four portions that characterized the treatments: 1) immediately after milking; 2) pasteurization soon after the milking; 3) 7 days after freezing at -8.5 (± 2.8°C) and pasteurized; 4) 14 days after freezing at -8.5 (± 2.8°C) and pasteurized. The content of total phenolic compounds was determined, and the antioxidant capacity was assessed using the 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl free radicals scavenging. The results were expressed as mean and standard deviation of six replications. There was a positive correlation between the evaluated methods and reduction in total phenolic content and total antioxidant capacity with slow pasteurization and according to freezing time. There was a negative effect of pasteurization and freezing on the total phenolic content and total antioxidant capacity, and the most significant reduction was observed within the first 7 days of storage.