Paula Pertuzatti edited sectionAntioxidant_C.tex  about 9 years ago

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Uma alternativa para diminuição do desperdício de alimentos que ocorre nas etapas posteriores ao processamento, seria o investimento na tecnologia de embalagens, mais especificamente embalagens ativas, ou seja, “packaging in which subsidiary constituents have been included in or on either the packaging material or the package headspace to enhance the performance of the package system” \cite{Robertson_2006}. Dentre as embalagens ativas, destaca-se os filmes incorporados de compostos antioxidantes. Currently many studies have been carried out with the aim of evaluate the antioxidant capacity of films, targeting\cite{Wang_2014} their use as active packaging, for the reason that the incorporation of antioxidant extracts in films can improve the shelf life of products and decreases oxidation in food rich in unsaturated fatty acids.   An extensive scientific research about the use of synthetic antioxidants like BHT, BHA, poliphenols, thioesters and organophosphate in food packaging exists. However, there is a current trend of utilization of natural antioxidants instead of synthetic antioxidants, due to adverse physiological effects that some synthetic antioxidants may exhibit. Therefore, new studies evaluating the the effect of application of tocopherols~\cite{Marcos2014}, carotenoids, essential oils~\cite{Ramos2014}, phenolic compounds, curcuminoids~\cite{Bittencourt2014}, vitamin C found in fruit extracts, flowers~\cite{Samsudin2014}, seaweeds~\cite{Cian2014}, leaves, roots~\cite{Tongnuanchan2013} and residues of food industry~ \cite{Ferreira2014}, in fish~\cite{BarbosaPereira2014}, meat~\cite{Contini2014}, beverages and cereals have been developed.  Apesar da grande quantidade de trabalhos científicos que estão sendo produzidos nos últimos anos, sobre o desenvolvimento de filmes antioxidantes, Cooksey, (2010) afirma que much of the work on active packaging has remained at the research stage but some have been commercialized. Dentre as embalagens ativas com antioxidante comercializadas, destacam-se as embalagens onde an independent device such as a sachet with oxygen scavenger is added. The most common oxygen scavenger are iron or ferrous oxide fine powders, although other compounds can be used \cite{G_mez_Estaca_2014}. Portanto ainda se faz necessário mais pesquisas com filmes antioxidants para que estes possam ser inseridos no mercado.