scholarly journals Gelatin-Based Antimicrobial Films Incorporating Pomegranate (Punica granatum L.) Seed Juice by-Product

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 166 ◽  
Author(s):  
Arantzazu Valdés ◽  
Esther Garcia-Serna ◽  
Antonio Martínez-Abad ◽  
Francisco Vilaplana ◽  
Alfonso Jimenez ◽  
...  
Keyword(s):  
Food Packaging ◽  
Active Material ◽  
Barrier Properties ◽  
Punica Granatum ◽  
Total Phenolic ◽  
Vapour Permeability ◽  
Casting Technique ◽  
Potential Strategy ◽  
Main Components ◽  
Punica Granatum L

Pomegranate (Punica granatum L.) seed juice by-product (PSP) was added as reinforcing and antimicrobial agent to fish gelatin (FG) films as a promising eco-friendly active material for food packaging applications. A complete linkage analysis of polysaccharides in PSP showed xylan and cellulose as main components. This residue showed also high total phenolic content and antioxidant activity. Three formulations were processed by adding PSP to FG (0, 10, 30 wt. %) by the casting technique, showing films with 10 wt. % of PSP the best performance. The addition of PSP decreased elongation at break and increased stiffness in the FG films, particularly for 30 wt. % loading. A good compatibility between FG and PSP was observed by SEM. No significant (p < 0.05) differences were obtained for barrier properties to oxygen and water vapour permeability compared to the control with the incorporation of PSP, whereas water resistance considerably increased and transparency values decreased (p < 0.05). High thermal stability of films and inhibition against S. aureus were observed. The addition of PSP at 10 wt. % into FG was shown as a potential strategy to maintain the integrity of the material and protect food against lipid oxidation, reducing huge amounts of pomegranate and fish wastes.

scholarly journals Effect of glycerol plasticizer loading on the physical, mechanical, thermal, and barrier properties of arrowroot (Maranta arundinacea) starch biopolymers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. Tarique ◽  
S. M. Sapuan ◽  
A. Khalina
Keyword(s):  
Food Packaging ◽  
Barrier Properties ◽  
Glycerol Concentration ◽  
Cross Sectional ◽  
Vapour Permeability ◽  
Solubility In Water ◽  
Elongation At Break ◽  
Casting Technique ◽  
Solution Casting Technique ◽  
Film Making

AbstractThis research was set out to explore the development of arrowroot starch (AS) films using glycerol (G) as plasticizer at the ratio of 15, 30, and 45% (w/w, starch basis) using solution casting technique. The developed films were analyzed in terms of physical, structural, mechanical, thermal, environmental, and barrier properties. The incorporation of glycerol to AS film-making solution reduced the brittleness and fragility of films. An increment in glycerol concentration caused an increment in film thickness, moisture content, and solubility in water, whereas density and water absorption were reduced. The tensile strength and modulus of G-plasticized AS films were reduced significantly from 9.34 to 1.95 MPa and 620.79 to 36.08 MPa, respectively, while elongation at break was enhanced from 2.41 to 57.33%. FTIR analysis revealed that intermolecular hydrogen bonding occurred between glycerol and AS in plasticized films compared to control films. The G-plasticized films showed higher thermal stability than control films. The cross-sectional micrographs revealed that the films containing 45% glycerol concentration had higher homogeneity than 15% and 30%. Water vapour permeability of plasticized films increased by an increase in glycerol concentrations. The findings of this research provide insights into the development of bio-degradable food packaging.

scholarly journals Cellulose Nanofibril (CNF) Films and Xylan from Hot Water Extracted Birch Kraft Pulps

2019 ◽  
Vol 9 (16) ◽  
pp. 3436 ◽  
Author(s):  
Marc Borrega ◽  
Hannes Orelma
Keyword(s):  
Food Packaging ◽  
Kraft Pulp ◽  
Barrier Properties ◽  
Hot Water ◽  
Kraft Pulps ◽  
Cellulose Nanofibril ◽  
Vapour Permeability ◽  
Transparent Films ◽  
Cnf Films ◽  
Birch Kraft Pulp

The effects of xylan extraction from birch kraft pulp on the manufacture and properties of cellulose nanofibril (CNF) films were here investigated. Hot water extractions of bleached and unbleached kraft pulps were performed in a flow-through system to remove and recover the xylan. After the extraction, the pulps were oxidized with 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) and fibrillated in a high-pressure microfluidizer. Compared to CNF from bleached kraft pulp, the CNF dispersions obtained from water-extracted pulps were less viscous and generally contained a higher amount of microfiber fragments, although smaller in size. In all cases, however, smooth and highly transparent films were produced from the CNF dispersions after the addition of sorbitol as plasticizer. The CNF films made from water-extracted pulps showed a lower tensile strength and ductility, probably due to their lower xylan content, but the stiffness was only reduced by the presence of lignin. Interestingly, the CNF films from water-extracted bleached pulps were less hydrophilic, and their water vapour permeability was reduced up to 25%. Therefore, hot water extraction of bleached birch kraft pulp could be used to produce CNF films with improved barrier properties for food packaging, while obtaining a high-purity xylan stream for other high-value applications.

scholarly journals Comparison of five solvents in the extraction of phenolic anti-oxidants from pomegranate (Punica granatum L.) peel

2019 ◽  
Vol 3 (5) ◽  
pp. 140-147
Author(s):  
Abderrezak Kennas ◽  
Hayat Amellal-Chibane
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Content ◽  
Antioxidant Activities ◽  
Punica Granatum ◽  
Extraction Yield ◽  
Total Phenolic ◽  
Phenolic Antioxidants ◽  
Punica Granatum L ◽  
Extracting Solvent ◽  
High Inhibition

Background: Pomegranate peels are rich in bioactive compounds and could be an alternative natural source such as antioxidants. Aims: The aim of the present study was to assess the abilities of five solvents to extract phenolic antioxidants from pomegranate peels. Methods and Material: Pomegranate peels powder was subjected to extraction and the extraction yield was compared. The total phenolic, flavonoid, condensed and hydrolysable tannins contents were analyzed. The antioxidant activity of the extracts was evaluated by two methods (DPPH* and ABTS•+ scavenging capacities) and results were then compared. Results: Results showed that the mixture methanol/water (50:50) allowed higher extraction yield (37.33±5.3%) than the others solvents (P<0.05). Further, the total phenolic, flavonoid and condensed tannins contents were the highest in mixture water/methanol (50:50) extract. Phenolic antioxidants showed a distinct reducing capacity and a high DPPH* inhibition values were recorded for all extracts with no significant differences (P>0.05) between ethanol and mixture water/methanol (50:50) extracts. All extracts exhibited high inhibition against ABTS•+ but with a considerable variation. Phenolic content and antioxidant activities were well positively correlated with each other. Conclusions: Our findings revealed that the choice of the extracting solvent affects considerably the extraction of phenolic antioxidants from pomegranate peels. Keywords: Pomegranate peels, solvent extraction, antioxidant activity, phenolic antioxidants.

scholarly journals Stability of the Ellagitannin Fraction and Antioxidant Capacity of Varietal Pomegranate Juices

2015 ◽  
Vol 10 (6) ◽  
pp. 1934578X1501000
Author(s):  
Pedro Mena ◽  
Cristina García-Viguera
Keyword(s):  
Antioxidant Capacity ◽  
Ellagic Acid ◽  
Phenolic Content ◽  
Punica Granatum ◽  
In Vitro Assays ◽  
Total Phenolic ◽  
Promising Alternative ◽  
The Stability ◽  
Punica Granatum L

This work aimed to assess the effect of combining two pomegranate (Punica granatum L.) cultivars at different rates on the ellagitannin content, antioxidant capacity, and total phenolic content of varietal pomegranate juices. Widely distinct juices made from Mollar de Elche and Wonderful cultivars were used for the elaboration of blended juices. They were stored for 70 days at both room and refrigeration temperatures. This study revealed a significant cultivar effect on the stability of main pomegranate ellagitannins (punicalagins, punicalins, punicalagin-like compound, and ellagic acid derivatives) and on the antioxidant capacity measured by the ABTS+ and DPPH• in vitro assays. Blended juices enhanced and/or retained the initial ellagitannin content and antioxidant capacity of pure juices during storage. Thus, blending varietal juices could be suggested as a promising alternative to the development of fresh juices with a high, stable phytochemical load.

scholarly journals Impact of Olive Extract Addition on Corn Starch-Based Active Edible Films Properties for Food Packaging Applications

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1339
Author(s):  
Arantzazu Valdés García ◽  
Olga B. Álvarez-Pérez ◽  
Romeo Rojas ◽  
Cristobal N. Aguilar ◽  
María Carmen Garrigós
Keyword(s):  
Food Packaging ◽  
Corn Starch ◽  
Radical Scavenging ◽  
Water Vapor Permeability ◽  
Edible Films ◽  
Total Phenolic ◽  
Vapor Permeability ◽  
Antioxidant Power ◽  
Casting Technique ◽  
By Products

Active edible films based on corn starch containing glycerol as a plasticizer and an olive extract obtained from Spanish olive fruit (Olea europaea) by-products (olive extract; OE) at different concentrations (0, 0.05, 0.1 and 0.2 wt%) were prepared by using the casting technique and further solvent-evaporation. OE showed high total phenolic and flavonoids contents and antioxidant activity, which was evaluated by using three different methods: free radical scavenging assay by (1,1-dipheny l-2-picrylhydrazyl) DPPH, 2,2-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) ABTS radical inhibition and ferric reducing antioxidant power (FRAP). The incorporation of OE into the corn starch/glycerol matrix underlined the antioxidant potential and antimicrobial effect against E. coli and S. aureus of these novel active films, being noticeable for films added with 0.2 wt% OE. The developed active films showed a clear thermo-oxidative stability improvement with OE incorporation, in particular at 0.2 wt% loading with an increase of around 50 °C in the initial degradation temperature (Tini) and oxidation onset temperature (OOT). The functional properties of control films were also improved with OE addition resulting in a decrease in Young’s modulus, elongation at break, shore D hardness and water vapor permeability. The present work suggested the potential of the developed corn starch-based edible films as low-price and sustainable food packaging systems to prevent the oxidative deterioration of packaged foodstuff while reducing also the generation of olive by-products.

Preparation of Degradable Sago Starch Film Incorporated with Zinc Oxide (ZnO) Nanoparticles for Enhanced Chemical Barrier and Mechanical Properties

2018 ◽  
Vol 792 ◽  
pp. 104-110
Author(s):  
Jasmine Sim Pei Chieh ◽  
Bazlul Mobin Siddique
Keyword(s):  
Mechanical Strength ◽  
Zno Nanoparticles ◽  
High Surface ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Sago Starch ◽  
Vapour Permeability ◽  
High Mechanical Strength ◽  
Casting Technique ◽  
Solution Casting Technique

The main objective of this study is to reinforce the mechanical strength and water resistance abilities of sago starch biopolymer by incorporating ZnO nanofillers. The biopolymer based nanocomposite films were cast utilizing different weight percentages of ZnO nanofillers (0, 1, 3 or 5 wt%) in sago starch matrix through solution casting technique. Uniform dispersing of ZnO nanofillers throughout the sago starch matrix was achieved by sonication and also to prevent the formation of ZnO nanoparticles aggregates. This was to further reinforce the chemical barrier properties of the film The results illustrated that with the increase of loading of ZnO nanoparticles from 0 to 5 wt%, the tensile strength and elastic modulus improved from 0.180 to 0.980 MPa and from 3.410 to 6.401 MPa respectively for the films, attributing to the high surface to volume ratios, the high mechanical strength of ZnO nanoparticles and the strong nanofiller-matrix interfacial adhesion. The elongation at break also enhanced owing to the slippage of ZnO nanofillers and the oriented sago starch polymer which activated the shear flow of the sago starch polymer. Sago starch nanocomposites with ZnO loadings varied from 0 to 5 wt% demonstrated decreased water vapour permeability from 4.992 × 10−10 g m−1 s−1 Pa−1 to 2.723 × 10−10 g m−1 s−1 Pa−1.

scholarly journals Phytochemical Characteristics and Pharmacological Properties Studies of the Powders of Punica granatum L. (Lythraceae) Leaves from Seven Regions of Burkina Faso with a View to Standardizing

2021 ◽  
pp. 1-11
Author(s):  
Salfo Ouédraogo ◽  
Tata Kadiatou Traoré ◽  
Benjamin Ouedraogo ◽  
Boladé Constantin Atchadé ◽  
Adjaratou Coulibaly ◽  
...  
Keyword(s):  
Burkina Faso ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Punica Granatum ◽  
Total Phenolic ◽  
Pharmacological Properties ◽  
Phytochemical Screening ◽  
Ethanolic Extracts ◽  
Layer Chromatography ◽  
Punica Granatum L

Introduction: Punica granatum is a plant used in traditional and alternative medicine for the management of several diseases. Objective: The objective of the present work is to compare the phytochemical characteristics and the antioxidant properties of extracts of leaves powders of Punica granatum L. collected for standardization. Methodology: We worked on seven samples of powders of leaves of Punica granatum L collected in seven different regions of Burkina Faso. Two types of extracts, aqueous and hydroethanolic were prepared with each sample. We performed a phytochemical screening by thin layer chromatography (TLC), then determined the content of the various extracts in total phenolic and flavonoids as well as a study of the antioxidant activity of the aqueous and hydro-ethanolic extracts of the plant. Results: Fourteen extracts of Punica granatum are obtained and these contain secondary metabolites such as tannins, sterols, triterpenes, saponosides and flavonoids. The anti-free radical activities at the DPPH* were more important in the samples from the towns of Dedougou, Banfora and Fada. The anti-free radicals at ABTS of extracts from the towns of Manga, Banfora, Fada and Kaya were found to be the most active. The FRAP test shows better activity of samples from the cities, Manga, Dedougou and Banfora. Conclusion: At the end of this work, the towns of Dedougou and Banfora may be the sites to be favored as harvesting sites because their samples were the richest in phenolic compounds and had the best antioxidant activities compared to the tests carried out.

scholarly journals Xylan Hemicellulose: A Renewable Material with Potential Properties for Food Packaging Applications

2021 ◽  
Vol 13 (24) ◽  
pp. 13504
Author(s):  
Petronela Nechita ◽  
Roman Mirela ◽  
Florin Ciolacu
Keyword(s):  
Food Packaging ◽  
Pathogenic Bacteria ◽  
Water Solubility ◽  
Barrier Properties ◽  
High Water ◽  
Hydroxyl Groups ◽  
Vapour Permeability ◽  
Coated Papers ◽  
Starting Point ◽  
Renewable Material

Xylan hemicelluloses are considered the second most abundant class of polysaccharides after cellulose which has good natural barrier properties necessary for foods packaging papers and films. Xylan exists today as a natural polymer, but its utilisation in packaging applications is limited and not sufficiently analysed. In this study, the performances of hardwood xylan hemicellulose in forming uniform films and as biopolymer for paper coatings were analysed. The xylan-coated paper and film samples were tested regarding their water, air, and water vapour permeability, water solubility, mechanical strength, and antimicrobial activity against pathogenic bacteria. Structural analyses of xylan hemicelluloses emphasised a high number of hydroxyl groups with high water affinity. This affects the functional properties of xylan-coated papers but can facilitate the chemical modification of xylan in order to improve their hydrophobic properties and extend their areas of application. The obtained results unveil a promising starting point for using this material in food packaging applications as a competitive and sustainable alternative to petroleum-based polymers.

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