Navegando por Autor "Godoy, Helena Teixeira"
Agora exibindo 1 - 2 de 2
Resultados por página
Opções de Ordenação
Item Application of Kohonen neural network for evaluation of the contamination of Brazilian breast milk with polychlorinated biphenyls.(2013) Kowalski, Claudia Hoffmann; Silva, Gilmare Antônia da; Godoy, Helena Teixeira; Poppi, Ronei Jesus; Augusto, FábioDue to the tendency of polychlorinated biphenyls (PCB) to accumulate in matrixes with high lipid content, the contamination of the breast milk with these compounds is a serious issue, mainly to the newborn. In this study, milk samples were collected from breastfeeding mothers belonging to 4 Brazilian regions (south, southeast, northeast and north). Twelve PCB were analyzed by HS-SPME-GC-ECD and the corresponding peak areas were correlated to the answers to a questionnaire of general habits, breastfeed- ing and characteristics of the living places. To realize this exploratory analyze, self-organizing maps generated applying Kohonen neural network were applied. It was possible to verify the occurrence of different PCB congeners in the breast milk relating to the region of the Brazil that the breastfeeding lives, the proximity to an industry, the proximity to a contaminated river or sea, the type of milk (colostrum, foremilk and hindmilk) and the number of past pregnancies.Item Bioaccessibility of some minerals in infant formulas.(2022) Moraes, Maria Rosa de; Silva, Emanueli do Nascimento da; Sanches, Vitor Lacerda; Cadore, Solange; Godoy, Helena TeixeiraTo guarantee the adequate intake of nutrients a variety of food supplementation (including infant formu- las) has been used to ensure the nutrition of infants. Con- sidering that the total concentration of nutrients is not enough to determine whether the food provides all the nutritional needs, the objective of this study was to eval- uate the total concentration and bioaccessibility of some elements in thirty commercial infant formulas consumed in Brazil. A standardized in vitro gastrointestinal digestion method was used to obtain the soluble fraction of each mineral, which was analyzed by ICP OES after microwave oxidative digestion to obtain the bioaccessibility values. The total concentration and the bioaccessibility of the elements varied considerably according to the sample type (traditional infant formulas, formulas for infants with gastrointestinal problems, formulas for premature and soy- based). The bioaccessibility values are 3–43% (Ca), 53–97% (Cu), 35–100% (Fe), 70–114% (K), 47–90% (Mg), 52–95% (P), 31–92% (Zn). In general, the total concentration values for the elements were higher than that declared by the manufacturers, also than the current leg- islation as well, regarding the DRI. Although these results, it is important to emphasize that the consumption of infant formulas can provide an adequate intake of minerals for the infants.