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P G Demertzis - One of the best experts on this subject based on the ideXlab platform.
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a study on the migration of organic pollutants from recycled Paperboard Packaging materials to solid food matrices
Food Chemistry, 2007Co-Authors: V I Triantafyllou, K Akridademertzi, P G DemertzisAbstract:Abstract Paper and board are widely used as food Packaging materials, mainly for disposable products. As public interest in conservation of natural resources has accelerated in the past several years, the use of recycled Paper and board has increased. Recycled fiber materials can be used in certain limits as food contact materials. The safety of recycled fiber-based materials for food contact applications is largely dictated by the ability of post-consumer contaminants to be absorbed into recycled materials and later released by the Packaging material and trapped on the food. The present work was undertaken with the aim of investigating the physicochemical behavior of selected model contaminants on Paper and board, in contact with foodstuffs thus producing a fundamental set of data about their mobility from recycled Paper and board into foods. More specifically, the kinetics of migration of selected model contaminants (surrogates) from contaminated recycled Paper Packaging samples into dry foodstuffs with different fat content was studied using a method based on solvent extraction and GC-FID quantification. Results showed the ability of selected contaminants of various types and various volatilities to potentially transfer to dry foods. The proportion of substances migrated to food was strongly dependent on the nature of the Paper samples, fat content of the food, chemical nature and volatility of the migrant. The highest level of migration of organic pollutants was observed for the substrate with the highest fat content. Furthermore, it is shown that contact time and temperature have a significant effect on migration of model contaminants into foods.
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determination of partition behavior of organic surrogates between Paperboard Packaging materials and air
Journal of Chromatography A, 2005Co-Authors: Vasileios I Triantafyllou, K Akridademertzi, P G DemertzisAbstract:Abstract The suitability of recycled Paperboard Packaging materials for direct food contact applications is a major area of investigation. Chemical contaminants (surrogates) partitioning between recycled Paper Packaging and foods may affect the safety and health of the consumer. The partition behavior of all possible organic compounds between cardboards and individual foodstuffs is difficult and too time consuming for being fully investigated. Therefore it may be more efficient to determine these partition coefficients indirectly through experimental determination of the partitioning behavior between cardboard samples and air. In this work, the behavior of organic pollutants present in a set of two Paper and board samples intended to be in contact with foods was studied. Adsorption isotherms have been plotted and partition coefficients between Paper and air have been calculated as a basis for the estimation of their migration potential into food. Values of partition coefficients (KPaper/air) from 47 to 1207 were obtained at different temperatures. For the less volatile surrogates such as dibutyl phthalate and methyl stearate higher KPaper/air values were obtained. The adsorption curves showed that the more volatile substances are partitioning mainly in air phase and increasing the temperature from 70 to 100 °C their concentrations in air (Cair) have almost doubled. The analysis of surrogates was performed with a method based on solvent extraction and gas chromatographic-flame ionization detection (GC-FID) quantification.
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migration studies from recycled Paper Packaging materials development of an analytical method for rapid testing
Analytica Chimica Acta, 2002Co-Authors: Vasileios I Triantafyllou, K Akridademertzi, P G DemertzisAbstract:Abstract The safe use of recycled Paper and board material for food Packaging applications is a major area of investigation. Studies on the migration of contaminants into foods and food simulants have been carried out to evaluate the suitability of recycled Paperboard for direct food contact applications. In the present study, the kinetics of migration of selected model contaminants (surrogates) from Paper Packaging samples into an alternative or substitute fatty food simulant (Tenax) was studied with the aim of developing a rapid test method based on solvent extraction, gas chromatography (GC)–mass spectrometry (MS) identification and GC–flame ionization detector (FID) quantification. These tested substances represent a large number of molecular sizes and polarities and are among those that may be present in fiber material. Crucial data about the time needed to reach equilibrium between Paper samples and the food simulant were obtained. The results of the study indicate that time and temperature conditions are the most important variables with respect to the actual mass transfer during contact with food simulants. The proposed quick test method seems to be suitable for compliance testing of Paper and board samples if migration limits are applied in future legislation.
Khaoula Khwaldia - One of the best experts on this subject based on the ideXlab platform.
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chitosan caseinate bilayer coatings for Paper Packaging materials
Carbohydrate Polymers, 2014Co-Authors: Khaoula Khwaldia, Altaf H Basta, Hajer Aloui, Houssni ElsaiedAbstract:Abstract Papers coated with caseinate and caseinate/chitosan bilayer films were developed. Caseinate, chitosan and caseinate/chitosan films were preliminary characterized by FTIR spectroscopy and thermal stability analyses. The effects of coating weight, caseinate concentration (7%, 10%, and 12%, w/w), and coating application methods (single layer and bilayer) on the physical and mechanical properties of coated Papers were studied. Increasing the concentration of caseinate led to a decrease in water vapor permeability (WVP) of the resulting coated Paper sheets. Chitosan significantly ( p E ) of coated Paper. However, the application of chitosan as a second layer on wet or dry caseinate films did not significantly affect ( p > 0.05) the tensile strength (TS) of coated Paper. The greatest reduction in Paper WVP is achieved by addition of a chitosan layer to the dried preformed caseinate-coated Paper.
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Biopolymer Coatings on Paper Packaging Materials
Comprehensive Reviews in Food Science and Food Safety, 2010Co-Authors: Khaoula Khwaldia, Elmira Arab-tehrany, Stephane DesobryAbstract:Increased environmental concerns over the use of certain synthetic Packaging and coatings in com- bination with consumer demands for both higher quality and longer shelf life have led to increased interest in al- ternative Packaging materials research. Naturally renewable biopolymers can be used as barrier coatings on Paper Packaging materials. These biopolymer coatingsmayretard unwantedmoisture transfer in food products, are good oxygen and oil barriers, are biodegradable, and have potential to replace current synthetic Paper and Paperboard coatings. Incorporation of antimicrobial agents in coatings to produce active Paper Packaging materials provides an attractive option forprotecting food frommicroorganismdevelopment and spread. The barrier, mechanical, and otherpropertiesofbiopolymer-coatedPaper are reviewed.Existing andpotential applications for bioactive coatings on Paper Packaging materials are discussedwith examples.
Stephane Desobry - One of the best experts on this subject based on the ideXlab platform.
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Biopolymer Coatings on Paper Packaging Materials
Comprehensive Reviews in Food Science and Food Safety, 2010Co-Authors: Khaoula Khwaldia, Elmira Arab-tehrany, Stephane DesobryAbstract:Increased environmental concerns over the use of certain synthetic Packaging and coatings in com- bination with consumer demands for both higher quality and longer shelf life have led to increased interest in al- ternative Packaging materials research. Naturally renewable biopolymers can be used as barrier coatings on Paper Packaging materials. These biopolymer coatingsmayretard unwantedmoisture transfer in food products, are good oxygen and oil barriers, are biodegradable, and have potential to replace current synthetic Paper and Paperboard coatings. Incorporation of antimicrobial agents in coatings to produce active Paper Packaging materials provides an attractive option forprotecting food frommicroorganismdevelopment and spread. The barrier, mechanical, and otherpropertiesofbiopolymer-coatedPaper are reviewed.Existing andpotential applications for bioactive coatings on Paper Packaging materials are discussedwith examples.
Ramon Batlle - One of the best experts on this subject based on the ideXlab platform.
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active paraffin based Paper Packaging for extending the shelf life of cherry tomatoes
Journal of Agricultural and Food Chemistry, 2010Co-Authors: Angel Rodriguezlafuente, Cristina Nerin, Ramon BatlleAbstract:A new active paraffin coating for Paper and board was evaluated for antimicrobial protection and decay retardation for cherry tomatoes. Different active agents were evaluated against Alternaria alternata fungus both in vitro and in vivo using artificially inoculated cherry tomatoes. Bark cinnamon and oregano essential oil showed the best performance (versus clove and leaf cinnamon essential oils) when incorporated to active Paper or board used for Packaging at nominal concentrations of 3 and 6% (w/w), respectively. Almost total inhibition of the fungus was obtained when 6% of bark cinnamon essential oil was applied to the Packaging material. A number of physicochemical parameters such as pH, weight loss, water activity, and color were monitored, and no significant differences between active, blank, and control samples were found for weight loss and color difference. The maximum transfer of trans-cinnamaldehyde and carvacrol to the food was detected after 1 or 2 days of storage. Sensorial analysis was performed, and panelists were not able to detect changes in cinnamon-based packaged tomatoes but they could in the oregano-based tomatoes.
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new cinnamon based active Paper Packaging against rhizopusstolonifer food spoilage
Journal of Agricultural and Food Chemistry, 2008Co-Authors: A Rodriguez, Cristina Nerin, Ramon BatlleAbstract:A new active Paper package based on the incorporation of cinnamon essential oil to solid wax paraffin as an active coating is proposed, developed, and evaluated. The antifungal activity of the active Paper is tested against Rhizopusstolonifer, and the results demonstrate that 6% (w/w) of the essential oil in the active coating formulation completely inhibits the growth of R. stolonifer, whereas 4% still has strong antimicrobial activity in in vitro conditions. Then, active Paper is evaluated with actual food, sliced bread, using different storage times. After 3 days of storage, almost complete inhibition is obtained with 6% cinnamon essential oil. Qualitative analysis by solid-phase microextraction and determination of cinnamaldehyde in the sliced bread were also performed and confirmed the strong correspondence between the inhibition of the mold and the amount of cinnamaldehyde in the bread.
Ferreira, Vilma Marques - One of the best experts on this subject based on the ideXlab platform.
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CARACTERIZAÇÃO MORFOMÉTRICA, GERMINAÇÃO E CONSERVAÇÃO DE SEMENTES DE Triplaris brasiliana CHAM. (POLYGONACEAE)
'Universidad Federal de Santa Maria', 2018Co-Authors: João Correia De ,araújo Neto, Teixeira, Jonhclécio Duarte, Neve, Maria Inajal Rodrigues Da Silva Das, Melo, Luan Danilo Ferreira De Andrade, Ferreira, Vilma MarquesAbstract:The objective of this study was to characterize morphometrically seeds, evaluate the treatments of scarification, and germination temperatures and the potential seed storage Triplaris Brasiliana Cham., a pioneer species, with great potential for recovery of degraded areas, permanent preservation, riparian areas and land. For the morphometric characterization, it was determined the length and thickness, mass of 1000 seeds, color, shape and hilum and micropyle location, such embryos, the location and type of germination. The germination test was evaluated from seeds with and without scarification at different temperatures. The storage was tested in glass and Paper Packaging and in refrigerator, dry chamber and ambient conditions. The embryo is axial, and the embryonic axis in the central part of the seed of the lower half, the germination is epigeal and the seedlings are fanerocotylar. Sowing the seeds scarified on Paper subjected to 30 °C were more favorable for germination and development of Triplaris brasiliana seedlings, and seeds sensitive to dehydration (intermediate), while preserving physiological quality for longer when stored in the refrigerator and camera in the packages used.O objetivo deste trabalho foi caracterizar a morfometria de sementes, padronizar o teste de germinação e identificar a condição ideal de armazenamento das sementes de Triplaris brasiliana Cham., uma espécie pioneira, com grande potencial para recuperação de áreas degradadas, de preservação permanente, áreas de mata ciliar e terra firme. Para a caracterização morfométrica, determinou-se o comprimento e espessura, massa de 1000 sementes, coloração, formato e localização do hilo e da micrópila, tipo de embrião, sua localização e tipo de germinação. O teste de germinação foi avaliado a partir das sementes com e sem escarificação em diferentes temperaturas. O armazenamento foi testado em embalagens de vidro e papel e em condições de geladeira, câmara seca e ambiente. O embrião é axial, sendo o eixo embrionário localizado na parte central da metade inferior da semente, a germinação é do tipo epígea e as plântulas são fanerocotiledonares. A semeadura das sementes escarificadas sobre papel submetida à temperatura de 30°C foi favorável para germinação e desenvolvimento das plântulas de Triplaris brasiliana, sendo as sementes sensíveis à desidratação (intermediária), preservando sua qualidade fisiológica por mais tempo, quando armazenadas em geladeira e câmara seca, nas embalagens utilizadas
