Edible Films from Carrageenan/Orange Essential Oil/Trehalose—Structure, Optical Properties, and Antimicrobial Activity

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

The research aim was to use orange essential oil and trehalose in a carrageenan matrix to form edible packaging. The edible packaging experimentally produced by casting from an aqueous solution were evaluated by the following analysis: UV-Vis spectrum, transparency value, transmittance, attenuated total reflectance Fourier-Transform spectroscopy (FTIR), scanning electron microscopy (SEM) and antimicrobial activity. The obtained results showed that the combination of orange essential oil with trehalose decreases the transmittance value in the UV and Vis regions (up to 0.14% ± 0.02% at 356 nm), meaning that produced films can act as a UV protector. Most produced films in the research were resistant to Gram-positive bacteria ( Staphylococcus aureus subsp. aureus), though most films did not show antibacterial properties against Gram-negative bacteria and yeasts. FTIR and SEM confirmed that both the amount of carrageenan used and the combination with orange essential oil influenced the compatibility of trehalose with the film matrix. The research showed how different combinations of trehalose, orange essential oils and carrageenan can affect edible film properties. These changes represent important information for further research and the possible practical application of these edible matrices.

Related collections

Most cited references 50

Record: found
Abstract: found
Article: found

Is Open Access

Photodegradation and photostabilization of polymers, especially polystyrene: review

Emad Yousif, Raghad Haddad (2013)

Exposure to ultraviolet (UV) radiation may cause the significant degradation of many materials. UV radiation causes photooxidative degradation which results in breaking of the polymer chains, produces free radical and reduces the molecular weight, causing deterioration of mechanical properties and leading to useless materials, after an unpredictable time. Polystyrene (PS), one of the most important material in the modern plastic industry, has been used all over the world, due to its excellent physical properties and low-cost. When polystyrene is subjected to UV irradiation in the presence of air, it undergoes a rapid yellowing and a gradual embrittlement. The mechanism of PS photolysis in the solid state (film) depends on the mobility of free radicals in the polymer matrix and their bimolecular recombination. Free hydrogen radicals diffuse very easily through the polymer matrix and combine in pairs or abstract hydrogen atoms from polymer molecule. Phenyl radical has limited mobility. They may abstract hydrogen from the near surrounding or combine with a polymer radical or with hydrogen radicals. Almost all synthetic polymers require stabilization against adverse environmental effects. It is necessary to find a means to reduce or prevent damage induced by environmental components such as heat, light or oxygen. The photostabilization of polymers may be achieved in many ways. The following stabilizing systems have been developed, which depend on the action of stabilizer: (1) light screeners, (2) UV absorbers, (3) excited-state quenchers, (4) peroxide decomposers, and (5) free radical scavengers; of these, it is generally believed that excited-state quenchers, peroxide decomposers, and free radical scavengers are the most effective. Research into degradation and ageing of polymers is extremely intensive and new materials are being synthesized with a pre-programmed lifetime. New stabilizers are becoming commercially available although their modes of action are sometimes not thoroughly elucidated. They target the many possible ways of polymer degradation: thermolysis, thermooxidation, photolysis, photooxidation, radiolysis etc. With the goal to increase lifetime of a particular polymeric material, two aspects of degradation are of particular importance: Storage conditions, and Addition of appropriate stabilizers. A profound knowledge of degradation mechanisms is needed to achieve the goal.

0 comments Cited 251 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

New insights on trehalose: a multifunctional molecule.

A D Elbein, Irena Pastuszak, Y. B. Pan … (2003)

Trehalose is a nonreducing disaccharide in which the two glucose units are linked in an alpha,alpha-1,1-glycosidic linkage. This sugar is present in a wide variety of organisms, including bacteria, yeast, fungi, insects, invertebrates, and lower and higher plants, where it may serve as a source of energy and carbon. In yeast and plants, it may also serve as a signaling molecule to direct or control certain metabolic pathways or even to affect growth. In addition, it has been shown that trehalose can protect proteins and cellular membranes from inactivation or denaturation caused by a variety of stress conditions, including desiccation, dehydration, heat, cold, and oxidation. Finally, in mycobacteria and corynebacteria, trehalose is an integral component of various glycolipids that are important cell wall structures. There are now at least three different pathways described for the biosynthesis of trehalose. The best known and most widely distributed pathway involves the transfer of glucose from UDP-glucose (or GDP-glucose in some cases) to glucose 6-phosphate to form trehalose-6-phosphate and UDP. This reaction is catalyzed by the trehalose-P synthase (TPS here, or OtsA in Escherichia coli ). Organisms that use this pathway usually also have a trehalose-P phosphatase (TPP here, or OtsB in E. coli) that converts the trehalose-P to free trehalose. A second pathway that has been reported in a few unusual bacteria involves the intramolecular rearrangement of maltose (glucosyl-alpha1,4-glucopyranoside) to convert the 1,4-linkage to the 1,1-bond of trehalose. This reaction is catalyzed by the enzyme called trehalose synthase and gives rise to free trehalose as the initial product. A third pathway involves several different enzymes, the first of which rearranges the glucose at the reducing end of a glycogen chain to convert the alpha1,4-linkage to an alpha,alpha1,1-bond. A second enzyme then releases the trehalose disaccharide from the reducing end of the glycogen molecule. Finally, in mushrooms there is a trehalose phosphorylase that catalyzes the phosphorolysis of trehalose to produce glucose-1-phosphate and glucose. This reaction is reversible in vitro and could theoretically give rise to trehalose from glucose-1-P and glucose. Another important enzyme in trehalose metabolism is trehalase (T), which may be involved in energy metabolism and also have a regulatory role in controlling the levels of trehalose in cells. This enzyme may be important in lowering trehalose concentrations once the stress is alleviated. Recent studies in yeast indicate that the enzymes involved in trehalose synthesis (TPS, TPP) exist together in a complex that is highly regulated at the activity level as well as at the genetic level.

0 comments Cited 197 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: not found
Article: not found

In vitro antimicrobial effects and mechanism of action of selected plant essential oil combinations against four food-related microorganisms

Fei-fei Lv, Hao Liang, Qipeng Yuan … (2011)

0 comments Cited 136 times – based on 0 reviews      Review now

Bookmark

All references

Author and article information

Contributors

Antonio Zuorro: Role: Academic Editor

Journal

Journal ID (nlm-ta): Polymers (Basel)

Journal ID (iso-abbrev): Polymers (Basel)

Journal ID (publisher-id): polymers

Title: Polymers

Publisher: MDPI

ISSN (Electronic): 2073-4360

Publication date (Electronic): 21 January 2021

Publication date Collection: February 2021

Volume: 13

Issue: 3

Electronic Location Identifier: 332

Affiliations

[1 ]Department of Plant Origin Food Sciences, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences Brno, Palackeho tr. 1946/1, 612 42 Brno, Czech Republic; dordevicd@ 123456vfu.cz (D.D.); tremlovab@ 123456vfu.cz (T.B.)

[2 ]Faculty of Chemistry, Brno University of Technology, Purkynova 118, 612 00 Brno, Czech Republic; sedlacek-p@ 123456fch.vut.cz

[3 ]Department of Molecular Pharmacy, Faculty of Pharmacy, Masaryk University, Palackeho tr. 1946/1, 612 00 Brno, Czech Republic; nejezchlebovam@ 123456pharm.muni.cz (N.M.); tremlj@ 123456pharm.muni.cz (T.J.)

Author notes

[* ]Correspondence: jancikovas@ 123456vfu.cz ; Tel.: +420-774-607-936

Author information

Jancikova Simona https://orcid.org/0000-0001-8858-3279

Dordevic Dani https://orcid.org/0000-0002-2435-9726

Sedlacek Petr https://orcid.org/0000-0002-6211-9643

Treml Jakub https://orcid.org/0000-0002-8690-9981

Article

Publisher ID: polymers-13-00332

DOI: 10.3390/polym13030332

PMC ID: 7864528

PubMed ID: 33494246

SO-VID: a76d0575-8da3-4f60-9aa6-30719cbba7a7

License:

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

Edible Films from Carrageenan/Orange Essential Oil/Trehalose—Structure, Optical Properties, and Antimicrobial Activity

Read this article at

Abstract

Related collections

Fandom activity

Most cited references 50

Photodegradation and photostabilization of polymers, especially polystyrene: review

New insights on trehalose: a multifunctional molecule.

In vitro antimicrobial effects and mechanism of action of selected plant essential oil combinations against four food-related microorganisms

Author and article information

Contributors

Journal

Affiliations

Author notes

Author information

Article

History

Categories

Comments

Comment on this article

Similar content 197

Cited by 32

Most referenced authors 793