Relevant bibliographies by topics / Chitosan coating

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Chitosan coating'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 June 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Chitosan coating.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Chitosan coating"

1

Wang, J., J. de Boer, and K. de Groot. "Preparation and Characterization of Electrodeposited Calcium Phosphate/Chitosan Coating on Ti6Al4V Plates." Journal of Dental Research 83, no. 4 (2004): 296–301. http://dx.doi.org/10.1177/154405910408300405.

Full text
Abstract:
Electrolytically deposited carbonate apatite coating demonstrates higher strength but weaker support for bone marrow stromal cell attachment than do biomimetically deposited coatings. It is hypothesized that the incorporation of chitosan will increase the biocompatibility of electrolytic coating while maintaining its original strength. To verify this hypothesis, we formed a hybrid calcium phosphate/chitosan coating through electrodeposition. We found that the incorporation of chitosan influenced calcium phosphate formation and crystallization. Moreover, coating thickness and surface roughness decreased with increasing chitosan concentration. Hybrid coating exhibited an increased dissolution rate in both acidic and neutral simulated physiologic solution, whereas no significant difference on adhesive strength was found between the hybrid and original coatings (P > 0.05). Most importantly, the calcium phosphate/chitosan coating proved to be a more favorable surface for goat bone marrow stromal cell attachment than an unincorporated coating (P < 0.01). Considering its economic and simple production, a hybrid calcium phosphate/chitosan coating is thought to be an attractive candidate for future applications.
APA, Harvard, Vancouver, ISO, and other styles
2

Abriana, Andi, and Suriana Laga. "Application of Edible Coating from Chitosan Skin Shrimp (Paneus Monodon) to Apple (Malus Sylvestris) Minimum Processed." Journal of Food Studies 5, no. 1 (2016): 12. http://dx.doi.org/10.5296/jfs.v5i1.9087.

Full text
Abstract:
The minimum processed fruit is a series of the fresh fruit treatment with a view to removing the parts could not be consumed and reduced the size of the product to speed up their performance in the market. The aim of study to determine effect of chitosan edible coating from shrimp waste against shrinkage and chemical changes during storage of apple with minimum processed. Chitosan as the edible coating isolated from of waste skin shrimp. Chitosan used as a coating material in minimum processed apples during storage. The treatment used of edible coating and no coating as the control with storage time 3 days. Edible coating from shrimp (<em>Paneus monodon</em>) skin can be used as a coating material processed apple during storage. Using of edible coating waste shrimp contain chitosan as a coating can reduce the occurrence of several shrinkage and retain moisture and vitamin C during storage. Edible coatings for minimum processed apple coating can provide the result of the use of edible coating treatment is the best for weight reduction in shrinkage, moisture content and vitamin C during storage. The use chitosan as the edible coatings on apples in minimum processed is the one solution avoid weight reduction, water content and vitamin C during storage.
APA, Harvard, Vancouver, ISO, and other styles
3

Godínez-Garrido, Nancy A., Jorge A. Torres-Castillo, Juan G. Ramírez-Pimentel, Jorge Covarrubias-Prieto, Francisco Cervantes-Ortiz, and Cesar L. Aguirre-Mancilla. "Effects on Germination and Plantlet Development of Sesame (Sesamum indicum L.) and Bean (Phaseolus vulgaris L.) Seeds with Chitosan Coatings." Agronomy 12, no. 3 (2022): 666. http://dx.doi.org/10.3390/agronomy12030666.

Full text
Abstract:
In seed technology, the use of biocompatible materials, such as chitosan, has been demonstrated to improve the germination process and establishment of seedlings. This research is focused on the effect of a chitosan coating on the germination and development of sesame and bean plantlets. The seeds were treated with different coating techniques and combinations of chitosan: chitosan solutions at 0.1, 0.5 and 1% were used in film coating, chitosan flakes with particle sizes of 1.19 mm and 0.71 mm were used as a crusted coating, and chitosan flakes with a size of 1.19 mm were used for coating with acrylic resin. Images of the coatings were obtained by means of scanning electron microscopy; the effect on germination, germination speed, vigor index, length and root area of plantlets were also determined. Chitosan treatments increased germination by 26% in bean and 16% in sesame compared with the control; the germination speed index showed an increase of 61% in bean and 58% in sesame. The treatments with chitosan increased the length of the root in bean by 77%, and in sesame four times more, compared with the control treatments. Different forms of chitosan coatings improve germination and seedling establishment; however, the response to the type of coating at a given stage of seedling development will depend on the crop species.
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Kaipeng, Lihong Zhao, and Beihai He. "Chitosan/Montmorillonite Coatings for the Fabrication of Food-Safe Greaseproof Paper." Polymers 13, no. 10 (2021): 1607. http://dx.doi.org/10.3390/polym13101607.

Full text
Abstract:
Here, we report a non-toxic method for improving the oil-resistant performance of chitosan coated paper by coating the mixture of chitosan and montmorillonite (MMT) instead of coating chitosan solution only. Through combining MMT into the chitosan coatings, the coated paper exhibited a lower air permeability and enhanced oil resistance under a lower coating load. For coated papers C2.5 and C3 by coating 2.5% (w/v) and 3% (w/v) chitosan without adding MMT in the chitosan coating, the coating load was 3.76 g/m2 and 3.99 g/m2, respectively, and the kit rating values were only 7–8/12. Regarding the sample C2M0.1 coated by the mixed solution containing 2% (w/v) chitosan and 0.1% (w/v) MMT, its coating load was only 3.65 g/m2, the paper permeability after coating was reduced to 0.00507 μm/Pa·s, owing to the filling of MMT into the cellulosic fibers network, and the kit rating reached 9/12. Moreover, C2M0.1 showed improved mechanical properties, whereby its tearing resistance was 5.2% and 6.6% higher than that of the uncoated paper in the machine direction and the cross direction, respectively.
APA, Harvard, Vancouver, ISO, and other styles
5

JIN, T., and J. B. GURTLER. "Inactivation of Salmonella on Tomato Stem Scars by Edible Chitosan and Organic Acid Coatings†." Journal of Food Protection 75, no. 8 (2012): 1368–72. http://dx.doi.org/10.4315/0362-028x.jfp-12-054.

Full text
Abstract:
This study was conducted to investigate the efficacy of antimicrobial coatings for inactivation of Salmonella on the surface of tomato stem scars. Scars were inoculated with a four-strain cocktail of Salmonella (serovars Montevideo, Newport, Saintpaul, and Typhimurium) and coated with acid-chitosan solutions. The chitosan coating with three acids (3A plus chitosan), the chitosan coating with one acid, and the three-acid solution without chitosan reduced the populations of Salmonella by 6.0, 3.6, and 5.3 log CFU per stem scar, respectively. Addition of allyl isothiocyanate (10 μl/ml) to the 3A plus chitosan coating did not significantly increase (P &gt; 0.05) the antimicrobial efficacy. Although the populations of Salmonella in the controls (ca. 7.5 log CFU per stem scar) did not change significantly throughout the 14-day storage period at 10°C, Salmonella cells were reduced to undetectable levels (&lt;0.7 log CFU per stem scar) in the samples treated with 3A plus chitosan coating after two days of storage, and no growth was observed for the remaining storage period. Results from this study demonstrate that coatings of acid plus chitosan provide an alternative antimicrobial intervention for decontamination of tomatoes.
APA, Harvard, Vancouver, ISO, and other styles
6

Zhai, Xiaofan, Yadong Ren, Nan Wang, et al. "Microbial Corrosion Resistance and Antibacterial Property of Electrodeposited Zn–Ni–Chitosan Coatings." Molecules 24, no. 10 (2019): 1974. http://dx.doi.org/10.3390/molecules24101974.

Full text
Abstract:
Microbial corrosion is a universal phenomenon in salt water media such as seawater and wastewater environments. As a kind of efficient protective metal coating for steel, the damage of the Zn–Ni alloy coating was found to be accelerated under microbial corrosive conditions. To solve this problem, chitosan, which is considered a natural product with high antibacterial efficiency, was added to Zn–Ni electrolytes as a functional ingredient of electrodeposited Zn–Ni–chitosan coatings. It was found that the addition of chitosan significantly and negatively shifted the electrodeposition potentials and influenced the Ni contents, the phase composition, and the surface morphologies. By exposing the coatings in a sulfate-reducing bacteria medium, the microbial corrosion resistance was investigated. The results showed that compared to the Zn–Ni alloy coating, Zn–Ni–chitosan coatings showed obvious inhibiting effects on sulfate-reducing bacteria (SRB) and the corrosion rates of these coatings were mitigated to some degree. Further research on the coatings immersed in an Escherichia coli-suspended phosphate buffer saline medium showed that the bacteria attachment on the coating surface was effectively reduced, which indicated enhanced antibacterial properties. As a result, the Zn–Ni–chitosan coatings showed remarkably enhanced anticorrosive and antibacterial properties.
APA, Harvard, Vancouver, ISO, and other styles
7

Virk, Ranjot Singh, Muhammad Atiq Ur Rehman, Muhammad Azeem Munawar, et al. "Curcumin-Containing Orthopedic Implant Coatings Deposited on Poly-Ether-Ether-Ketone/Bioactive Glass/Hexagonal Boron Nitride Layers by Electrophoretic Deposition." Coatings 9, no. 9 (2019): 572. http://dx.doi.org/10.3390/coatings9090572.

Full text
Abstract:
Electrophoretic deposition (EPD) was used to produce a multilayer coatings system based on chitosan/curcumin coatings on poly-ether-ether-ketone (PEEK)/bioactive glass (BG)/hexagonal boron nitride (h-BN) layers (previously deposited by EPD on 316L stainless steel) to yield bioactive and antibacterial coatings intended for orthopedic implants. Initially, PEEK/BG/h-BN coatings developed on 316L stainless steel (SS) substrates were analyzed for wear studies. Then, the EPD of chitosan/curcumin was optimized on 316L SS for suspension stability, thickness, and homogeneity of the coatings. Subsequently, the optimized EPD parameters were applied to produce chitosan/curcumin coatings on the PEEK/BG/h-BN layers. The multilayered coatings produced by EPD were characterized in terms of composition, microstructure, drug release kinetics, antibacterial activity, and in vitro bioactivity. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) confirmed the deposition of chitosan/curcumin on the multilayer coating system. The release of curcumin upon immersion of multilayer coatings in phosphate-buffered saline (PBS) was confirmed by ultraviolet/visible (UV/VIS) spectroscopic analysis. The antibacterial effect of chitosan/curcumin as the top coating was determined by turbidity tests (optical density measurements). Moreover, the multilayer coating system formed an apatite-like layer upon immersion in simulated body fluid (SBF), which is similar in composition to the hydroxyapatite component of bone, confirming the possibility of achieving close bonding between bone and the coating surface.
APA, Harvard, Vancouver, ISO, and other styles
8

Wang, J., B. Wang, W. Jiang, and Y. Zhao. "Quality and Shelf Life of Mango (Mangifera Indica L. cv. `Tainong') Coated by Using Chitosan and Polyphenols." Food Science and Technology International 13, no. 4 (2007): 317–22. http://dx.doi.org/10.1177/1082013207082503.

Full text
Abstract:
Chitosan-based coatings were used to delay ripening and prolong shelf-life of mango fruit stored at 15±1°C and 85—90% RH for 35 days. Mango fruits were treated with 2% chitosan solution or with 2% chitosan containing 1% tea polyphenols (TP—chitosan). Samples were taken at regular intervals for analysis. Results indicated that chitosan coating alone could decrease the decay incidence and weight loss, and delay the change in colour, pH and titratable acidity of mango fruit during storage. While coating the fruit with TP—chitosan was more effective at keeping quality of the fruit during storage. Firmness of the control fruit declined rapidly to 18.6 N after 5 days of storage at 15°C, which was 22.8% or 71.5% lower than that of the fruit treated with chitosan or TP—chitosan, respectively. Sensory quality of mango was enhanced significantly by the TP—chitosan coating compared with chitosan coating alone. These results suggested that treatment with chitosan containing TP exhibited high potential for shelf-life extension of mango fruit.
APA, Harvard, Vancouver, ISO, and other styles
9

Shyu, Yung-Shin, Guan-Wen Chen, Shao-Ching Chiang, and Wen-Chieh Sung. "Effect of Chitosan and Fish Gelatin Coatings on Preventing the Deterioration and Preserving the Quality of Fresh-Cut Apples." Molecules 24, no. 10 (2019): 2008. http://dx.doi.org/10.3390/molecules24102008.

Full text
Abstract:
The effect of fish gelatin and chitosan coatings on the physicochemical characteristics of fresh-cut apples (Malus pumila Mill.), stored at 5 °C and 22 °C, was investigated. Chitosan provided an effective control for microbial growth, maintained firmness during 4 days of storage at room temperature (22 °C), and 12 days at refrigerator (5 °C). The results indicated that chitosan coating caused a significant decrease (p < 0.05) in the L* value of cube color of cut apples. Fish gelatin–chitosan coatings mitigated the L* value and decrease in hue angle of the cut apple samples, at cold storage. Experimental results showed that fish gelatin–chitosan and chitosan coatings, can be used to mitigate the formation of vitamin C, due to respiration, microbial growth, and weight loss at cold storage. Fish gelatin–chitosan coating might be a better combination for maintaining appearance and extending shelf-life of cut apples, compared to only chitosan coatings.
APA, Harvard, Vancouver, ISO, and other styles
10

Kehila, Shani, Sharon Alkalai-Tuvia, Daniel Chalupowicz, Elena Poverenov, and Elazar Fallik. "Can Edible Coatings Maintain Sweet Pepper Quality after Prolonged Storage at Sub-Optimal Temperatures?" Horticulturae 7, no. 10 (2021): 387. http://dx.doi.org/10.3390/horticulturae7100387.

Full text
Abstract:
This work evaluated the efficacies of different coatings: chitosan, gelatin and chitosan-gelatin applied layer-by-layer (LbL); for maintaining the quality of sweet peppers that were stored for 3 weeks at a sub-optimal temperature (1.5 °C) and at an optimal storage temperature (7 °C). After the cold-storage period, fruits were kept under marketing conditions (21 °C) for 3 more days. An edible chitosan coating (2%) effectively alleviated chilling injury and the incidence of decay, and also preserved the nutritional quality of sweet peppers that were kept for 3 weeks at 1.5 °C plus 3 more days at 21 °C. The chitosan coating was more effective than the two other coatings. All three coating treatments significantly reduced external CO2 production, as compared to uncoated control fruit. Storage temperatures did not significantly affect external CO2 production, although CO2 production was slightly higher at 1.5 °C. The chitosan coating exhibited good CO2 gas permeability properties and the peppers coated with that material had lower respiration rates than those in the other two experimental treatments or the control. From a practical point of view, chitosan coating could replace the plastic bags previously found to alleviate chilling injury in peppers that are stored at 1.5 °C as a quarantine treatment.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Chitosan coating"

1

Vieira, Raquel Nadine Cadete. "Coating of magnetite nanoparticles with chitosan for magnetic hyperthermia." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21895.

Full text
Abstract:
Mestrado em Materiais e Dispositivos Biomédicos
O cancro é uma das doenças com maior ocorrência na população mundial e com uma elevada taxa de mortalidade. Os principais problemas na luta contra o cancro prendem-se com a dificuldade de diagnóstico precoce, a citotoxicidade associada aos fármacos anticancerígenos usados em quimioterapia convencional e a falta de tratamentos mais eficazes. Com o advento da nanotecnologia, tem havido um crescente interesse na aplicação de nanopartículas e nanoestruturas, nas mais diversas áreas da ciência, nomeadamente em aplicações biomédicas. Neste contexto em particular, as nanopartículas magnéticas apresentam propriedades interessantes, por exemplo, em sistemas de libertação controlada de fármaco e em hipertermia. A sua aplicação em áreas relacionadas com a saúde, como o tratamento de cancro por hipertermia magnética, passa necessariamente por uma boa caracterização das suas propriedades e pela correta avaliação das suas capacidades de libertação de energia sob a forma de calor por indução magnética. Nesse sentido, este trabalho teve como objetivo a síntese de nanopartículas de magnetite devido a sua compatibilidade com o organismo humano e propriedades magnéticas. No entanto, devido ao seu elevado grau de agregação assim como facilidade de oxidação em meios aquosos existe uma necessidade de revestir estas partículas. Para tal, foi utilizado um biopolímero: a quitosana. A ligação do revestimento da quitosana ao núcleo do óxido de ferro foi realizada através de dois tipos de ancoragem: através da dopamina, conhecida pela sua grande afinidade aos grupos aminas e através do ácido cafeico, por apresentar uma similaridade estrutural à dopamina. Para a caracterização estrutural e morfológica das partículas recorreu-se à difração de raios-X (DRX), à espetroscopia de infravermelhos com transformada de Fourier (FTIR), à dispersão dinâmica da luz (DLS), ao Potencial Zeta e à microscopia eletrónica de transmissão (TEM). As propriedades magnéticas foram medidas por magnetometria de SQUID (Superconducting Quantum Interferance Device). Por fim foi avaliada a capacidade das partículas sintetizadas para aplicação em hipertermia magnética.
Cancer is a disease with high incidence in the world population and equally with a high mortality rate. The main problems in the fight against cancer are linked to the difficulty of early diagnosis, the cytotoxicity associated with anticancer drugs used in conventional chemotherapy and the lack of more effective treatments. With the advent of nanotechnology, there has been increasing interest in the application of nanoparticles and nanostructures, in several areas of science, such as biomedicine. In this context, the magnetic nanoparticles have interesting properties in controlled drug release systems and hyperthermia. Its application in areas related to health, such as the treatment of cancer by magnetic hyperthermia, necessarily requires a good characterization of their properties and the correct assessment of their ability to release energy in the form of heat by magnetic induction. Therefore, this study aimed the synthesis of nanoparticles of magnetite due to their biocompatibility and magnetic properties. However, due to their high degree of aggregation as well as facile oxidation in aqueous media there is a need to coat these particles. For this purpose, a biopolymer was used: chitosan. The binding of the coat to the core of the iron oxide was accomplishment through two types of anchorages molecules: dopamine, knowing for their great affinity with amine groups and through caffeic acid due to structural similarity to dopamine. The structural and morphological characterization was performed using X-ray diffraction (DRX), Fourier transformed infrared spectroscopy (FTIR), dynamic light scattering (DLS), Zeta Potential; thermalgravimetric analysis and transmission electron microscopy (TEM). The magnetic properties were studied using a Superconducting Quantum Interference Device (SQUID) magnetometer. Finally, we evaluated the ability of some of the synthesized NPs for use in magnetic hyperthermia.
APA, Harvard, Vancouver, ISO, and other styles
2

Coquery, Clément. "Fonctionnalisation du chitosane : vers un nouveau revêtement biosourcé pour la protection des métaux contre la corrosion." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2018. http://www.theses.fr/2018ENCM0003/document.

Full text
Abstract:
Le traitement de la corrosion constitue un enjeu économique, environnemental et de sécurité sanitaire. Plus largement utilisée à l’échelle industrielle, la protection par revêtements consiste à isoler le métal du milieu agressif par une couche adhérente, continue et imperméable. Ils doivent répondre à trois propriétés majeures : 1) être fortement adhérent au substrat métallique, 2) posséder de bonnes propriétés barrière pour limiter la pénétration de l’eau et des espèces agressives et 3) apporter un rôle d’inhibition de la corrosion. Cependant, la protection des surfaces métalliques par les techniques actuelles génère une pollution notable liée à l’usage de chromates. L’utilisation de polymères biosourcés et solubles en milieu aqueux serait un challenge et contribuerait à préserver l’environnement. Les polysaccharides comme le chitosane sont des macromolécules biodégradables et respectueuses de l'environnement possédant des propriétés d’anticorrosion et sont donc des alternatives envisageables. Ces travaux de thèse portent sur le développement de revêtements anticorrosion à base de chitosane. Le chitosane possède deux points faibles pour être utilisé comme revêtement contre la corrosion : 1) une adhésion insuffisante sur la surface des matériaux et 2) un caractère hydrophile. En conséquence, le chitosane a été modifié chimiquement afin d’augmenter son adhésion et ses propriétés barrières. Afin d’améliorer son adhésion sur des substrats métalliques, des groupements de type acide phosphonique ont été ajoutés via la réaction de Kabachnik-Fields sur le chitosane. L’élaboration d’un chitosane possédant des fonctions catéchol a été également discutée. Dans un premier temps, le chitosane modifié a été testé et caractérisé par spectroscopie d’impédance électrochimique (SIE) en tant qu’inhibiteur de corrosion puis des revêtements à partir de ce même chitosane ont été réalisés et leurs protections contre la corrosion ont été évaluées. Deux approches de mise en forme des revêtements ont été testées : par dip-coating et par la technique Layer-by-Layer (LbL). Différentes voies de fonctionnalisation du chitosane ont également été présenté afin d’augmenter les propriétés barrière du revêtement. La chimie de phthaloylation du chitosane a été décrite puis le greffage de chaînes hydrophobes a été étudié
Corrosion treatment is an economic, environmental and health safety issue. More widely used on an industrial scale, coating protection consists in isolating the metal from the aggressive medium by an adherent, continuous and impermeable layer. They must have three major properties: 1) be strongly adherent to the metallic substrate, 2) have good barrier properties to limit the penetration of water and aggressive species and 3) provide a role in inhibiting corrosion. However, the protection of metal surfaces by current techniques generates significant pollution due to the use of chromates. The use of bio-based and soluble polymers in aqueous media would be a challenge and would contribute to preserving the environment. Polysaccharides such as chitosan are biodegradable and environmentally friendly macromolecules with anticorrosive properties and are therefore possible alternatives. These theses focus on the development of anticorrosion coatings based on chitosan. Chitosan has two weak points for use as a coating against corrosion: 1) insufficient adhesion on the surface of the materials and 2) hydrophilicity. As a result, chitosan has been chemically modified to increase its adhesion and barrier properties. In order to improve its adhesion on metal substrates, phosphonic acid groups have been added via the Kabachnik-Fields reaction on chitosan. The development of a chitosan with catechol functions was also discussed. Initially, the modified chitosan was tested and characterized by electrochemical impedance spectroscopy (EIS) as a corrosion inhibitor and coatings based on the same chitosan were made and their corrosion protection evaluated. Two approaches of coating elaborations were tested: dip-coating and Layer-by-Layer (LbL). Different ways of functionalizing chitosan have also been presented to increase the barrier properties of the coating. Phthaloylation chemistry of chitosan was described and hydrophobic chain grafting was studied
APA, Harvard, Vancouver, ISO, and other styles
3

Więckiewicz, Mieszko, Eric Wolf, Katarzyna Walczak, Heike Meissner, and Klaus Boening. "Chitosan Coating on Silica-Modified Polymethyl Methacrylate for Dental Applications." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-231732.

Full text
Abstract:
Chitosan is a cationic natural polymer that is widely used as a topical dressing in wound management. Temporary coatings of removable denture bases with chitosan might be useful as supportive treatment in oral medicine. The aim of this study was to analyze the thickness, uniformity, and adhesive strength of chitosan coatings on simulated denture bases made from polymethyl methacrylate (PMMA). According to a standardized protocol, 20 PMMA cylinders (13 mm diameter, 5 mm in height) as well as 20 cubes (a = 25 mm) with intaglio U-shaped profiles were manufactured to simulate average sized alveolar ridges. Cylinders as well as cubes were divided into four test series with n = 5 each. After sandblasting with silica-modified alumina, one frontal surface of the PMMA cylinders and the intaglio surfaces of the U-shaped profiles was coated with chitosan acetate solution according to the following protocols: one layer of 2% chitosan acetate solution (test series I), one layer of 4% chitosan acetate solution (test series II), two layers of 2% chitosan acetate solution (test series III), and two layers of 4% chitosan acetate solution (test series IV). After drying and neutralization with NaOH, each cube was cut transversely and the coating thickness across the U-shaped profile assessed with a light microscope. Adhesive strength was evaluated by simulated tooth brushing and the loss of chitosan coating was evaluated qualitatively. Statistical analysis used Friedman ANOVA test for dependent samples and Kruskal-Wallis test for independent samples, post-hoc Dunn’s test (p < 0.05), and binomial test (p = 0.05). The mean chitosan coating thicknesses in the depth of the U-profiles were 71 µm (test series I), 77 µm (test series II), 121 µm (test series III), and 517 µm (test series VI). The thickness continuously decreased with rising angulation of the U-profile side walls. In test series I, the chitosan coating thickness significantly dropped above a 30° angulation of the U-profile side walls. In test series II to IV, the chitosan thickness drop was not statistically significant at angulations of 30° and 60°, but was at 90° angulation of the U-profile side walls. Adhesion strength was rated fair to good and did not differ significantly among the four test series. The coating technique described revealed chitosan layers with overall good adhesion strength but differing thicknesses. Coatings with one or two layers of 4% chitosan acetate solution allowed a relatively uniform chitosan thickness and thus might be usable in oral medicine.
APA, Harvard, Vancouver, ISO, and other styles
4

Więckiewicz, Mieszko, Eric Wolf, Katarzyna Walczak, Heike Meissner, and Klaus Boening. "Chitosan Coating on Silica-Modified Polymethyl Methacrylate for Dental Applications." Molecular Diversity Preservation International (MDPI), 2017. https://tud.qucosa.de/id/qucosa%3A30700.

Full text
Abstract:
Chitosan is a cationic natural polymer that is widely used as a topical dressing in wound management. Temporary coatings of removable denture bases with chitosan might be useful as supportive treatment in oral medicine. The aim of this study was to analyze the thickness, uniformity, and adhesive strength of chitosan coatings on simulated denture bases made from polymethyl methacrylate (PMMA). According to a standardized protocol, 20 PMMA cylinders (13 mm diameter, 5 mm in height) as well as 20 cubes (a = 25 mm) with intaglio U-shaped profiles were manufactured to simulate average sized alveolar ridges. Cylinders as well as cubes were divided into four test series with n = 5 each. After sandblasting with silica-modified alumina, one frontal surface of the PMMA cylinders and the intaglio surfaces of the U-shaped profiles was coated with chitosan acetate solution according to the following protocols: one layer of 2% chitosan acetate solution (test series I), one layer of 4% chitosan acetate solution (test series II), two layers of 2% chitosan acetate solution (test series III), and two layers of 4% chitosan acetate solution (test series IV). After drying and neutralization with NaOH, each cube was cut transversely and the coating thickness across the U-shaped profile assessed with a light microscope. Adhesive strength was evaluated by simulated tooth brushing and the loss of chitosan coating was evaluated qualitatively. Statistical analysis used Friedman ANOVA test for dependent samples and Kruskal-Wallis test for independent samples, post-hoc Dunn’s test (p < 0.05), and binomial test (p = 0.05). The mean chitosan coating thicknesses in the depth of the U-profiles were 71 µm (test series I), 77 µm (test series II), 121 µm (test series III), and 517 µm (test series VI). The thickness continuously decreased with rising angulation of the U-profile side walls. In test series I, the chitosan coating thickness significantly dropped above a 30° angulation of the U-profile side walls. In test series II to IV, the chitosan thickness drop was not statistically significant at angulations of 30° and 60°, but was at 90° angulation of the U-profile side walls. Adhesion strength was rated fair to good and did not differ significantly among the four test series. The coating technique described revealed chitosan layers with overall good adhesion strength but differing thicknesses. Coatings with one or two layers of 4% chitosan acetate solution allowed a relatively uniform chitosan thickness and thus might be usable in oral medicine.
APA, Harvard, Vancouver, ISO, and other styles
5

Andersson, Albin. "A novel chitosan-stearic coating with bee-pollen microcapsules for corrosion protection." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277886.

Full text
Abstract:
In this project a novel chitosan-stearic acid (CS-SA) coating with bee-pollen microcapsules for encapsulation of 2-mecraptobenzothiazole (MBT) as a waterborne formulation for a biocompatible corrosion protection coating was developed and the coating properties was analyzed. Hydrophobic stearic acid (SA) was crosslinked with via a carbodiimide reaction to form micelles and is assembled on the bee- pollen grains and the chitosan matrix was further self-crosslinked using glutaraldehyde (GA). Stearic acid was used to hydrophobically interact with modified pollen and with further crosslinking with the chitosan, which was proven successful by FTIR results. The encapsulation of anticorrosive agent MBT into pollen was successful and examined by UV-Vis spectroscopy, however, the pollen cannot form a fully stable formulation with the chitosan micelle matrix, partially due to its relatively big size (ca. 20 μm), causing problems with forming a proper barrier protection. The size of the grains and the interference of the carbodiimide crosslinking is the most severe problems with the pollen microcapsules. Therefore, no further testing of the corrosive properties could be done, which requires a dense and stable coating to sustain in salty water for the whole measurement period. As the reference coatings without pollen provided much more promising results, especially when crosslinked with GA, the conclusion is that the reactivity of the pollen is proven difficult to crosslink, and choosing a proper size of a microcontainer and the appropriate encapsulation method in the binder matrix is vital and important for developing a corrosion protective coating.
Detta projekt bygger på framställningen och analysen av en tidigare outforskad chitosan-stearinsyra (CS-SA) färg med bi pollen som mikrokapslar för inkapsling av 2-mercaptobenzothiazole (MBT) som en vattenlöslig och biokompatibel anti-korrosions färg. CS-SA var tillverkat med en carbodiimide reaktion för att bilda miceller som ska omslutna pollenkornen, och även ett försök med vidare tvärbindning mellan chitosanen med glutaraldehyde (GA) gjordes. Stearinsyra fick interagera hydrofobiskt med den modifierade pollen och tvärbindes sedan med chitosan, som visade sig vara lyckad med hjälp av FTIR analys. Enkapsuleringen av MBT visade sig med UV-Vis spektroskopi vara lyckad, dock på grund av pollens stora korn (ca 20 μm) orsakade problem med att bilda en stabil barriär mot omgivningen. Storleken av pollen och dess reaktivitet med carbodiimide tvärbindningen är de mest allvarliga problemen med pollen som mikrokapslar, och därav gjordes inga vidare tester av korrosions egenskaperna då detta kräver en täckande och stabil film genom hela mätningen. Då även referensfärgen som gjordes utan pollen gav avsevärt mycket bättre resultat i det avseendet är slutsatsen att reaktiviteten av pollen gör det problematiskt att tvärbinda med chitosan och valet av en kapsel av rätt storlek och hur den inkapslar är avgörande för att utveckla en bra korrosionsskyddande färg.
APA, Harvard, Vancouver, ISO, and other styles
6

Can, Cetin Ayca. "Effects Of Edible Chitosan Coating On Quality Parameters Of Pomegranate (punica Granatum) Arils." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614081/index.pdf.

Full text
Abstract:
The effects of edible chitosan coating on quality factors of pomegranate (Punica granatum) arils were investigated in the present research. For that purpose, pomegranate arils were treated with 0% (control) and 1% chitosan (extracted from shrimp shells and deacetylated (.75%)) solutions and stored at 4
APA, Harvard, Vancouver, ISO, and other styles
7

Cisse, Mohamed. "Immobilisation d’un système lactoperoxydase dans un enrobage de chitosane dans le but de prolonger la conservation des mangues." Thesis, Montpellier, SupAgro, 2012. http://www.theses.fr/2012NSAM0012/document.

Full text
Abstract:
L'exportation des mangues est limitée par le mûrissement rapide et la prolifération microbienne sur les fruits. Cette thèse propose une nouvelle approche sûre et saine utilisant des molécules d'origine naturelle pour améliorer la conservation post-récolte des mangues et ainsi participer à la préservation de la santé des consommateurs et à une amélioration des potentialités du commerce international de certains pays exportateurs. Ces travaux ont montré que l'immobilisation du système lactoperoxydase dans le film de chitosane appliqué sur l'épiderme des mangues pouvait maintenir la qualité microbiologique et physicochimique des fruits traités. Le couplage Chitosane-Système lactoperoxydase a prolongé la durée de conservation des mangues durant plus de deux semaines sans altérer leurs qualités organoleptiques.Ce travail a permis également de mettre en évidence la synergie entre le système lactoperoxydase et la concentration de chitosane. Un enrobage optimum de 1% de chitosane a permis de fixer le système enzymatique et de maintenir les mangues en bon état sanitaire. La présence d'iode dans le système lactoperoxydase n'agit pas de manière significative sur la conservation des mangues
The mango export is limited by the rapid ripening and microbial growth on the fruit. This thesis proposes a new approach to safe and healthy using natural molecules to improve post-harvest conservation of mango and thus help preserve the health of consumers and improved the potential of international trade in certain exporting countries. This work shown that the immobilization of the lactoperoxidase in the chitosan film and applied as coating of mangoes could maintain the microbiological and physicochemical quality of fruits. Chitosan-coupling lactoperoxidase system extended the shelf life of mangoes for over two weeks without affecting their organoleptic quality.This work also helped to highlight the synergy between the lactoperoxidase and the concentration of chitosan. An optimum coating made from 1% chitosan allowed to fix the enzyme system and to maintain the mangoes in a good sanitary condition. The presence of iodine in the lactoperoxidase does not act significantly on the conservation of mangoes
APA, Harvard, Vancouver, ISO, and other styles
8

Wieckiewicz, Mieszko, Eric Wolf, Gert Richter, Heike Meissner, and Klaus Boening. "New Concept of Polymethyl Methacrylate (PMMA) and Polyethylene Terephthalate (PET) Surface Coating by Chitosan." Molecular Diversity Preservation International (MDPI), 2016. https://tud.qucosa.de/id/qucosa%3A30051.

Full text
Abstract:
Chitosan is known for its hemostatic and antimicrobial properties and might be useful for temporary coating of removable dentures or intraoral splints to control bleeding after oral surgery or as a supportive treatment in denture stomatitis. This study investigated a new method to adhere chitosan to polymethyl methacrylate (PMMA) and polyethylene terephthalate (PET). There were 70 cylindrical specimens made from PMMA and 70 from PET (13 mm diameter, 6 mm thickness). The materials with ten specimens each were sandblasted at 2.8 or 4.0 bar with aluminum oxide 110 μm or/and aluminum oxide coated with silica. After sandblasting, all specimens were coated with a 2% or 4% acetic chitosan solution with a thickness of 1 mm. Then the specimens were dried for 120 min at 45 °C. The precipitated chitosan was neutralized with 1 mol NaOH. After neutralization, all specimens underwent abrasion tests using the tooth-brushing simulator with soft brushes (load 2N, 2 cycles/s, 32 °C, 3000 and 30,000 cycles). After each run, the specimen surfaces were analyzed for areas of remaining chitosan by digital planimetry under a light microscope. The best chitosan adhesion was found after sandblasting with aluminum oxide coated with silica (U-Test, p < 0.05) in both the PMMA and the PET groups. Hence, with relatively simple technology, a reliable bond of chitosan to PMMA and PET could be achieved.
APA, Harvard, Vancouver, ISO, and other styles
9

Wieckiewicz, Mieszko, Eric Wolf, Gert Richter, Heike Meissner, and Klaus Boening. "New Concept of Polymethyl Methacrylate (PMMA) and Polyethylene Terephthalate (PET) Surface Coating by Chitosan." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-215855.

Full text
Abstract:
Chitosan is known for its hemostatic and antimicrobial properties and might be useful for temporary coating of removable dentures or intraoral splints to control bleeding after oral surgery or as a supportive treatment in denture stomatitis. This study investigated a new method to adhere chitosan to polymethyl methacrylate (PMMA) and polyethylene terephthalate (PET). There were 70 cylindrical specimens made from PMMA and 70 from PET (13 mm diameter, 6 mm thickness). The materials with ten specimens each were sandblasted at 2.8 or 4.0 bar with aluminum oxide 110 μm or/and aluminum oxide coated with silica. After sandblasting, all specimens were coated with a 2% or 4% acetic chitosan solution with a thickness of 1 mm. Then the specimens were dried for 120 min at 45 °C. The precipitated chitosan was neutralized with 1 mol NaOH. After neutralization, all specimens underwent abrasion tests using the tooth-brushing simulator with soft brushes (load 2N, 2 cycles/s, 32 °C, 3000 and 30,000 cycles). After each run, the specimen surfaces were analyzed for areas of remaining chitosan by digital planimetry under a light microscope. The best chitosan adhesion was found after sandblasting with aluminum oxide coated with silica (U-Test, p < 0.05) in both the PMMA and the PET groups. Hence, with relatively simple technology, a reliable bond of chitosan to PMMA and PET could be achieved.
APA, Harvard, Vancouver, ISO, and other styles
10

Rau, Steffen Wolfgang. "Development and testing of a machine-coatable chitosan coating applied to a flexible packaging sealant." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1252937299/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Chitosan coating"

1

Fernández-Saiz, Patricia, and José M. Lagaron. "Chitosan for Film and Coating Applications." In Biopolymers - New Materials for Sustainable Films and Coatings. John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119994312.ch5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ismail, Amr Sayed Emam. "Chitosan Coating Biotechnology for Sustainable Environment." In Biotechnology for Sustainable Environment. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1955-7_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ferrero, Franco, and Monica Periolatto. "Chitosan Coating on Textile Fibers for Functional Properties." In Handbook of Composites from Renewable Materials. John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119441632.ch69.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ghosh, Tabli, and Vimal Katiyar. "Chitosan-Based Edible Coating: A Customise Practice for Food Protection." In Materials Horizons: From Nature to Nanomaterials. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9804-0_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Tang, C. K., A. K. Arof, and N. Mohd Zain. "Chitin Fiber Reinforced Silver Sulfate Doped Chitosan as Antimicrobial Coating." In IFMBE Proceedings. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21729-6_19.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Leedy, Megan R., Holly J. Martin, P. Andrew Norowski, J. Amber Jennings, Warren O. Haggard, and Joel D. Bumgardner. "Use of Chitosan as a Bioactive Implant Coating for Bone-Implant Applications." In Advances in Polymer Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/12_2011_115.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Li, Jinli, Yuye Zhong, Shaoyun Huang, Ting Guo, Li Cheng, and Houbin Li. "Effects of Edible Chitosan Coating on Postharvest Quality of Zigui Navel Orange." In Advances in Graphic Communication, Printing and Packaging. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3663-8_83.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Li, Quan Li, Nan Huang, Guo Jiang Wan, L. S. Zhao, and Xu Yan Tang. "Ultra-Thin Film of Chitosan and Sulfated Chitosan Coating on Titanium Oxide by Layer-by-Layer Self-Assembly Method." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.645.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Mulijani, S., and G. Sulistyso. "Formation and Characterization of Hydroxyapatite/Chitosan Composite: Effect of Composite Hydroxyapatite Coating and its Application on Biomedical Materials." In Chemistry of Phytopotentials: Health, Energy and Environmental Perspectives. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-23394-4_38.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Francis, Adel A. "Chitosan-Based Conversion Coatings." In Conversion Coatings for Magnesium and its Alloys. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89976-9_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Chitosan coating"

1

Maharani, Dina Kartika, Indriana Kartini, Nurul Hidayat Aprilita, Mikrajuddin Abdullah, and Khairurrijal. "Nanosilica-Chitosan Composite Coating on Cotton Fabrics." In THE THIRD NANOSCIENCE AND NANOTECHNOLOGY SYMPOSIUM 2010 (NNSB2010). AIP, 2010. http://dx.doi.org/10.1063/1.3515570.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Saeednia, L., and R. Asmatulu. "Methotrexate Loaded Magnetic Nanoparticles as a Targeted Drug Delivery Device." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-51193.

Full text
Abstract:
Targeted drug delivery systems have been shown to be promising alternative for the conventional drug delivery methods. Among numerous nanocarriers developed for therapeutic applications, iron oxide magnetic nanoparticles have attracted considerable attention. Fe3O4 (magnetite) is one of the most commonly used iron oxide in biomedical applications due to its biocompatibility and can be easily produced in research and industrial laboratories. The core/shell structure of magnetic nanoparticles allows the surface coating to avoid their agglomeration. Moreover, coating of Fe3O4 nanoparticles provide functional groups and consequently make the bioconjugation to the therapeutic agents. Coating magnetic nanoparticles with a biopolymer will also increase biocompatibility. Coating magnetic nanoparticles with a biopolymer will also increase biocompatibility. Chitosan can easily conjugate to the surface of magnetic nanoparticles and provide amine and hydroxyl groups for the further conjugation of the therapeutic drug. In this study, Fe3O4 magnetic nanoparticles were fabricated and were coated with chitosan via in-situ method. Prepared chitosan coated magnetic nanoparticles then were loaded with methotrexate (anti-cancer drug) through adsorption. The size and morphology of synthesized magnetic nanoparticles were evaluated using Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM). The chemical structure of bare and chitosan coated magnetic nanoparticles was analyzed by Fourier Transforms Infrared (FTIR). Methotrexate loading efficiency of chitosan coated nanoparticles was also evaluated. Cytotoxicity of nanoparticles was also studied in-vitro. The results confirmed the surface coating with chitosan and methotrexate loading. The synthesize chitosan coated magnetic nanoparticles showed promising application for cancer treatment.
APA, Harvard, Vancouver, ISO, and other styles
3

XU, DAN, HAI-RONG QIN, DAN REN, and YI-LIN YU. "Influence of Coating Time on the Preservation Performance of Chitosan/Montmorillonite Composite Coating on Tangerine Fruits." In The 21st IAPRI World Conference on Packaging. DEStech Publications, Inc., 2018. http://dx.doi.org/10.12783/iapri2018/24422.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Rihayat, Teuku, Suryani, Satriananda, et al. "Influence of coating polyurethane with mixture of bentonite and chitosan nanocomposites." In THE 3RD INTERNATIONAL SEMINAR ON CHEMISTRY: Green Chemistry and its Role for Sustainability. Author(s), 2018. http://dx.doi.org/10.1063/1.5082425.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Panda, Sikta, Chandan Kumar Biswas, and Subhankar Paul. "Development of Chitosan Coating on Ti-6Al-4V Alloy for Bone Implants." In the 5th International Conference. ACM Press, 2019. http://dx.doi.org/10.1145/3314493.3314505.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Rahman, Shekh, and Narayan Bhattarai. "Magnesium Oxide Based PLGA/Chitosan Microparticles for Controlled Release Study." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52143.

Full text
Abstract:
The performance of a therapeutic drug can be optimized by controlling the rate and extent of its release in the body. Polymeric microparticles are ideal vehicles for many controlled release drug delivery applications. Poly(lactic-co-glycolic acid) (PLGA) is a biodegradable, biocompatible and FDA approved synthetic polymer. When PLGA based controlled release drug delivery devices are fabricated, the surface of PLGA is typically modified by other hydrophilic polymers. But some hydrophilic polymers, such as poly(ethylene glycol) (PEG) can negatively influence the therapeutic outcomes. The goal of the present study was to fabricate and investigate the PLGA/chitosan microparticles for controlled release of therapeutic drugs. Chitosan is a naturally occurring biodegradable polysaccharide. We hypothesized that chitosan could be used as a surface coating of PLGA to improve controlled release of therapeutic drugs. The double emulsion solvent evaporation technique was modified and utilized to fabricate the PLGA/chitosan microparticles. The microparticles were tested with respect to several physicochemical properties, such as morphology, size distribution, chemical structure, quantification of chitosan content and in vitro release study of model drug. Magnesium is an essential electrolyte in the human body. Magnesium oxide (MgO) is used for treatment of magnesium deficiency. MgO was encapsulated in the PLGA/chitosan microparticles as a model drug.
APA, Harvard, Vancouver, ISO, and other styles
7

Koc, Serap, Burak Dikici, Mehmet Topuz, et al. "Preparation and Characterization of Chitosan/Hydroxyapatite Sol-Gel Coating on Ti-6Al-4V." In The 6th International Conference on Advanced Materials and Systems. INCDTP - Division: Leather and Footwear Research Institute, Bucharest, RO, 2016. http://dx.doi.org/10.24264/icams-2016.ii.12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hikmawati, Dyah, Siti Zulaihah, and Aminatun. "The design of 3D printed polylactic acid (PLA) morphology with coating of chitosan." In THE 2ND INTERNATIONAL CONFERENCE ON PHYSICAL INSTRUMENTATION AND ADVANCED MATERIALS 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0034911.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Maharsih, Inggit Kresna, Fadhil Muhammad Tarmidzi, Riza Alviany, Mela Aurelia, and Sisca Ardelia Putri. "The Effect of Beeswax and Chitosan Concentrations as Superhydrophobic Coating on Wound Dressing." In International Conference on Industrial Technology. SCITEPRESS - Science and Technology Publications, 2019. http://dx.doi.org/10.5220/0009405300580063.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Syahputra, Akhmad Rasyid, Ade Lestari Yunus, Nunung Nuryanthi, Oktaviani, and Tita Puspitasari. "Gamma irradiation induced effects on mechanical properties of chitosan-glycerol for edible coating." In PROCEEDINGS OF INTERNATIONAL CONFERENCE ON NUCLEAR SCIENCE, TECHNOLOGY, AND APPLICATION 2020 (ICONSTA 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0066942.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Chitosan coating"

1

Poverenov, Elena, Tara McHugh, and Victor Rodov. Waste to Worth: Active antimicrobial and health-beneficial food coating from byproducts of mushroom industry. United States Department of Agriculture, 2014. http://dx.doi.org/10.32747/2014.7600015.bard.

Full text
Abstract:
Background. In this proposal we suggest developing a common solution for three seemingly unrelated acute problems: (1) improving sustainability of fast-growing mushroom industry producing worldwide millions of tons of underutilized leftovers; (2) alleviating the epidemic of vitamin D deficiency adversely affecting the public health in both countries and in other regions; (3) reducing spoilage of perishable fruit and vegetable products leading to food wastage. Based on our previous experience we propose utilizing appropriately processed mushroom byproducts as a source of two valuable bioactive materials: antimicrobial and wholesome polysaccharide chitosan and health-strengthening nutrient ergocalciferol⁽ᵛⁱᵗᵃᵐⁱⁿ ᴰ2⁾. ᴬᵈᵈⁱᵗⁱᵒⁿᵃˡ ᵇᵉⁿᵉᶠⁱᵗ ᵒᶠ ᵗʰᵉˢᵉ ᵐᵃᵗᵉʳⁱᵃˡˢ ⁱˢ ᵗʰᵉⁱʳ ᵒʳⁱᵍⁱⁿ ᶠʳᵒᵐ ⁿᵒⁿ⁻ᵃⁿⁱᵐᵃˡ ᶠᵒᵒᵈ⁻ᵍʳᵃᵈᵉ source. We proposed using chitosan and vitamin D as ingredients in active edible coatings on two model foods: highly perishable fresh-cut melon and less perishable health bars. Objectives and work program. The general aim of the project is improving storability, safety and health value of foods by developing and applying a novel active edible coating based on utilization of mushroom industry leftovers. The work plan includes the following tasks: (a) optimizing the UV-B treatment of mushroom leftover stalks to enrich them with vitamin D without compromising chitosan quality - Done; (b) developing effective extraction procedures to yield chitosan and vitamin D from the stalks - Done; (c) utilizing LbL approach to prepare fungal chitosan-based edible coatings with optimal properties - Done; (d) enrichment of the coating matrix with fungal vitamin D utilizing molecular encapsulation and nano-encapsulation approaches - Done, it was found that no encapsulation methods are needed to enrich chitosan matrix with vitamin D; (e) testing the performance of the coating for controlling spoilage of fresh cut melons - Done; (f) testing the performance of the coating for nutritional enhancement and quality preservation of heath bars - Done. Achievements. In this study numerous results were achieved. Mushroom waste, leftover stalks, was treated ʷⁱᵗʰ ᵁⱽ⁻ᴮ ˡⁱᵍʰᵗ ᵃⁿᵈ ᵗʳᵉᵃᵗᵐᵉⁿᵗ ⁱⁿᵈᵘᶜᵉˢ ᵃ ᵛᵉʳʸ ʰⁱᵍʰ ᵃᶜᶜᵘᵐᵘˡᵃᵗⁱᵒⁿ ᵒᶠ ᵛⁱᵗᵃᵐⁱⁿ ᴰ2, ᶠᵃʳ ᵉˣᶜᵉᵉᵈⁱⁿᵍ any other dietary vitamin D source. The straightforward vitamin D extraction procedure and ᵃ ˢⁱᵐᵖˡⁱᶠⁱᵉᵈ ᵃⁿᵃˡʸᵗⁱᶜᵃˡ ᵖʳᵒᵗᵒᶜᵒˡ ᶠᵒʳ ᵗⁱᵐᵉ⁻ᵉᶠᶠⁱᶜⁱᵉⁿᵗ ᵈᵉᵗᵉʳᵐⁱⁿᵃᵗⁱᵒⁿ ᵒᶠ ᵗʰᵉ ᵛⁱᵗᵃᵐⁱⁿ ᴰ2 ᶜᵒⁿᵗᵉⁿᵗ suitable for routine product quality control were developed. Concerning the fungal chitosan extraction, new freeze-thawing protocol was developed, tested on three different mushroom sources and compared to the classic protocol. The new protocol resulted in up to 2-fold increase in the obtained chitosan yield, up to 3-fold increase in its deacetylation degree, high whitening index and good antimicrobial activity. The fungal chitosan films enriched with Vitamin D were prepared and compared to the films based on animal origin chitosan demonstrating similar density, porosity and water vapor permeability. Layer-by-layer chitosan-alginate electrostatic deposition was used to coat fruit bars. The coatings helped to preserve the quality and increase the shelf-life of fruit bars, delaying degradation of ascorbic acid and antioxidant capacity loss as well as reducing bar softening. Microbiological analyses also showed a delay in yeast and fungal growth when compared with single layer coatings of fungal or animal chitosan or alginate. Edible coatings were also applied on fresh-cut melons and provided significant improvement of physiological quality (firmness, weight ˡᵒˢˢ⁾, ᵐⁱᶜʳᵒᵇⁱᵃˡ ˢᵃᶠᵉᵗʸ ⁽ᵇᵃᶜᵗᵉʳⁱᵃ, ᵐᵒˡᵈ, ʸᵉᵃˢᵗ⁾, ⁿᵒʳᵐᵃˡ ʳᵉˢᵖⁱʳᵃᵗⁱᵒⁿ ᵖʳᵒᶜᵉˢˢ ⁽Cᴼ2, ᴼ²⁾ ᵃⁿᵈ ᵈⁱᵈ not cause off-flavor (EtOH). It was also found that the performance of edible coating from fungal stalk leftovers does not concede to the chitosan coatings sourced from animal or good quality mushrooms. Implications. The proposal helped attaining triple benefit: valorization of mushroom industry byproducts; improving public health by fortification of food products with vitamin D from natural non-animal source; and reducing food wastage by using shelf- life-extending antimicrobial edible coatings. New observations with scientific impact were found. The program resulted in 5 research papers. Several effective and straightforward procedures that can be adopted by mushroom growers and food industries were developed. BARD Report - Project 4784
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography