期刊
MICROCHEMICAL JOURNAL
卷 119, 期 -, 页码 152-158出版社
ELSEVIER
DOI: 10.1016/j.microc.2014.12.002
关键词
Bioaccessibility; Theoretical calculations; In vitro gastrointestinal digestion
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2013/26855-2, 2012/15020-4]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- National Institute of Advanced Analytical Science and Technology (INCTAA) [573894/2008-6, 2008/57808-1]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [12/15020-4] Funding Source: FAPESP
Theoretical calculations of the binding energies of metal-polyphenols and metal-cellulose, as well as the hydration energies of metal-polyphenols were used to support the results obtained for the bioaccessibility of aluminium, cadmium, iron and zinc from four types of lettuce and one type of cole that were evaluated using an in vitro gastrointestinal digestion model and inductively coupled plasma-mass spectrometry. The bioaccessibility of Al found in the vegetables were less than 11% of the total Al content, whereas Cd exhibited average bioaccessibility of approximately 14% for the fresh samples and 41% considering the dried vegetables studied. However, the results indicated average bioaccessibility of 35% and 26% for Zn and average bioaccessibility of 19% and 21% for Fe in fresh and dried samples, respectively. The low bioaccessibility of Al is due to its strong binding with all of the vegetable components, whereas the low bioaccessibility of Fe and Zn are due to their interactions with phytates. Cd was observed to be the most bioaccessible element in the dried samples because of its weak interaction with other compenents in the vegetables. (C) 2014 Elsevier B.V. All rights reserved.
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