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Starch Films Added of Açaí Pulp ( Euterpe oleracea Martius) BABT
Pessanha,Kênia Letícia Ferreira; Farias,Mônica Guimarães; Carvalho,Carlos Wanderlei Piler; Godoy,Ronoel Luiz de Oliveira.
ABSTRACT Edible films are an alternative to synthetic materials used for packaging foods. The aim of this study was to develop and characterize films made from cassava starch, freeze-dried acai and glycerol. The films were characterized for thickness, water vapor permeability, water solubility, anthocyanins, antioxidant capacity and mechanical properties. The results indicated a rich edible film in anthocyanins with considerable antioxidant capacity (150.70 micromol Trolox), which can extend the commercial validity of the packaged food and meets the growing demand for biodegradable packaging that tends to reduce the environmental impact. The addition results in a significant effect on the polymer matrix reducing the water solubility and water activity. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Active packaging; Biodegradable; Anthocyanins; ABTS; ORAC.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100504
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Microbiological quality and other characteristics of refrigerated chicken meat in contact with cellulose acetate-based film incorporated with rosemary essential oil BJM
Melo,Adriane Alexandre Machado de; Geraldine,Robson Maia; Silveira,Miriam Fontes Araujo; Torres,Maria Célia Lopes; Rezende,Cíntia Silva Minafra e; Fernandes,Thiago Henrique; Oliveira,Antonio Nonato de.
Antimicrobial active packaging delays or inhibits microorganism growth in packed products, and it can be used in a variety of food systems. The objective of the present research was to develop packaging incorporated with natural antimicrobial agents (active film). The effects of the active film on the spoilage, pathogenic microorganism counts, pH and color of the refrigerated chicken breast cuts were analyzed. Cellulose acetate-based active films incorporating two concentrations (20% and 50%, v/w) of rosemary (Rosmarinus officinalis L.) essential oil were manufactured and placed in contact with the chicken breast cuts for six days. An analysis of variance and mean comparison tests (Tukey's test, p<0.05) were performed on the results. The films that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Active packaging; Antimicrobial activity; Cellulose acetate; Rosmarinus officinalis L.; Chicken.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400025
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Essential oils of thyme and Rosemary in the control of Listeria monocytogenes in raw beef BJM
Oliveira,Maíra Maciel Mattos de; Brugnera,Danilo Florisvaldo; Piccoli,Roberta Hilsdorf.
This study was developed in order to evaluate two alternatives for the control of Listeria monocytogenes in raw bovine meat pieces, both based on the use of Thymus vulgaris and Rosmarinus officinalis essential oils (EOs). The antilisterial activity of different concentrations of the EOs was tested in vitro using agar dilution and disk volatilization techniques. In addition, L. monocytogenes was inoculated in meat pieces, which were submerged in edible gelatin coatings containing 2% (v/v) EOs or submitted to the vapor of EOs (0.74 μL.cm-3). L. monocytogenes was quantified after one, 48 and 96 hours of storage (7 °C). In the in vitro tests, the EO of T. vulgaris presented higher activity. The two options used (edible gelatin coating and vapor activity), in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Thymus vulgaris; Rosmarinus officinalis; Antilisterial compounds; Active packaging; Meat safety.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400022
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Biodegradable films of starch/PVOH/alginate in packaging systems for minimally processed lettuce (Lactuca sativa L.) Ciência e Agrotecnologia
Brandelero,Renata Paula Herrera; Brandelero,Evandro Martin; Almeida,Fábio Mendonça de.
ABSTRACT Biodegradable packaging may replace non-biodegradable materials when the shelf life of the packaged product is relatively short, as in minimally processed foods. The objective of this work was to evaluate the efficiency of biodegradable films comprising starch/polyvinyl alcohol (PVOH)/alginate with the addition of 0 or 0.5% of essential oil of copaiba (EOCP) or lemongrass (EOLM) compared to poly-vinyl chloride (PVC) films in the storage of minimally processed lettuce. Lettuce samples cut into 1-cm strips were placed in polypropylene trays wrapped with biodegradable films and stored at 6 ± 2 °C for 8 days. PVC films were used as controls. The biofilms presented 11.43-8.11 MPa resistance and 11.3-13.22% elongation, with water vapor permeability...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Active packaging; Biopolymer; Copaiba oil; Lemongrass oil.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000500510
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Efficiency of oxygen: absorbing sachets in different relative humidities and temperatures Ciência e Agrotecnologia
Cruz,Renato Souza; Soares,Nilda de Fátima Ferreira; Andrade,Nélio José de.
The main objective of this work was to evaluate the efficiency of oxygen - absorbing sachets at relative humidity of 75%, 80% and 85% and different temperatures, 10±2 ºC and 25±2 ºC. The experiment consisted in determining the O2 absorption under these conditions. A sachet was placed in desiccators with an internal air homogenization system. Aliquots of air were removed at pre-established time intervals and analyzed for oxygen content. The results showed that oxygen absorption by the sachet increased as the relative humidity increased for both temperature. Therefore the oxygen - absorbing sachets were most active under 25±2ºC and 85% relative humidity. At ambient condition (25±2ºC/75%RH) the rate of oxygen absorbed was 50 mL/day and 18,5 mL/day for 10±2ºC....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Active packaging; Oxygen - absorbing; Relative humidity; Temperature.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542007000600029
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