The influence of UV-irradiation on thermal and mechanical properties of chitosan and silk fibroin mixtures

Sionkowska, Alina; Płanecka, Anna; Lewandowska, Katarzyna; Michalska, Marta

doi:10.1016/j.jphotobiol.2014.08.017

Cited by 51 publications

(37 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It can be observed that there was a decrease in the absorbance in the 260-330 nm region. The results found were better compared to studies performed with chitosan films, where the absorption spectrum was altered with the development of an absorption band at 290 nm [20].…”

Section: Fourier Transform Infrared (Ftir) Spectroscopycontrasting

confidence: 53%

“…Amrutlal et al [19] reported a decrease of 33.4% in the intrinsic viscosity of guar gum solutions after 180 minutes of UV irradiation. In another work performed with chitosan solutions, the intrinsic viscosity reduction was approximately 90% [20]. Analyses with solutions of A. pavonina galactomannan show that the solution viscosity presented a discrete reduction by UV irradiation.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 91%

“…As seen in Table 2, the absorption was discreetly reduced until 120 minutes of irradiation. This decrease is probably due to the photochemical process of the chromophores responsible for absorption in this region [20]. It can be concluded that the biopolymer extracted from A. pavonina is photostable, favoring its use in the pharmaceutical and cosmetic industries.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Melo

Geronço

Sousa

et al. 2018

International Journal of Polymer Science

View full text Add to dashboard Cite

Plant polysaccharides have been increasingly employed in the pharmaceutical, industrial, and food environments due to their versatile functional properties. In the present investigation, a heteropolysaccharide galactomannan (GAP) was extracted from Adenanthera pavonina L. seeds and characterized by physicochemical analyses to determine its thermal properties, photostability, antioxidant activity, and acute toxicity. GAP was characterized by FTIR, DSC, and TG. The photostability of GAP submitted to artificial UV irradiation was analyzed. Antioxidant activity was evaluated by the DPPH (2,2-diphenyl-1-1-picrylhydrazyl) free radical-scavenging method, while a bioassay method was carried out to study acute toxicity in Artemia salina L. Physical-chemical and functional characteristics of GAP support its potential role in the food and pharmaceutical industries. GAP was photostable under UV irradiation. In vitro GAP antioxidant evaluation showed that it bears free radicalscavenging activity for DPPH radicals. The median lethal concentration (LC 50 ) of GAP was 239.4 mg•mL −1 , indicating that this biopolymer is nontoxic. Such results indicate that this biopolymer presents characteristics of neutrality, photostability, and nontoxicity that are commercially attractive.

show abstract

Section: Fourier Transform Infrared (Ftir) Spectroscopycontrasting

confidence: 53%

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 91%

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

See 1 more Smart Citation

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Melo

Geronço

Sousa

et al. 2018

International Journal of Polymer Science

View full text Add to dashboard Cite

show abstract

“…Non-covalent interactions are broken first because they are weaker than covalent; nevertheless, covalent bonds are also destroyed after prolonged irradiation. It results in worse properties of biomaterials made of chitosan [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The influence of UV-irradiation on chitosan modified by the tannic acid addition

Sionkowska

Kaczmarek

Gnatowska

et al. 2015

Journal of Photochemistry and Photobiology B: Biology

View full text Add to dashboard Cite

“…Due to the hydrophilic nature of chitosan, films composed of chitosan alone showed lack of stability, chemical cross linking with agents such as glutaraldehyde could overcome this, but they have been found to be toxic and the films are often non-biodegradable (3). Blending chitosan with other materials to produce stable films by physical cross-linking achieved via electrostatic and/or hydrogen bonding interaction has been investigated widely (3)(4)(5)(6)(7)(8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

Preparation, Characterization and Evaluation of Antifungal Efficacy of Chitosan/Soy Phosphatidylcholine Topical Films Containing Griseofulvin

Bavarsad

Kouchak

Varmaziar

et al. 2015

Jundishapur J Nat Pharm Prod

View full text Add to dashboard Cite

Background:Griseofulvin is an antifungal drug and is available as oral dosage forms. Development of topical treatment could be advantageous for superficial fungal infections of skin. The film forming property of chitosan has made it interesting for transdermal/ dermal drug delivery, but showed lack of stability. Soy phosphatidylcholine (PC), besides playing penetration enhancer and solubilizer roles, could enhance the stability and mechanical properties of the film. Films prepared from a mixture of chitosan and PC can achieve the benefits of both materials. Objectives: The aim of this study was to prepare and characterize films formed from blends of chitosan and soy PC for topical delivery of griseofulvin. Materials and Methods: Topical films composed of chitosan and soy PC were prepared by means of casting and solvent evaporation technique. The properties of the films were characterized regarding mechanical properties, swelling, ability to transmit vapor, drug release, thermal behavior and antifungal efficacy against Microsporum gypseum and Epidermophyton floccosum. Results: Presence of soy PC improved mechanical properties, lowered swelling ratio and increased stability of the films. Solubilizing activity of phospholipid resulted in higher flux of drug release from formulation containing higher amount of soy PC. Antifungal efficacy of formulations was confirmed against two species of dermatophytes in vitro. Conclusions: This topical composite film had the potential for griseofulvin delivery to superficial fungal infections.

show abstract

The influence of UV-irradiation on thermal and mechanical properties of chitosan and silk fibroin mixtures

Cited by 51 publications

References 38 publications

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

Biopolymer from Adenanthera pavonina L. Seeds: Characterization, Photostability, Antioxidant Activity, and Biotoxicity Evaluation

The influence of UV-irradiation on chitosan modified by the tannic acid addition

Preparation, Characterization and Evaluation of Antifungal Efficacy of Chitosan/Soy Phosphatidylcholine Topical Films Containing Griseofulvin

Contact Info

Product

Resources

About