Journal ArticleDOI
Extraction and Characterization of Chitin and Chitosan with Antimicrobial and Antioxidant Activities from Cosmopolitan Orthoptera Species (Insecta)
Murat Kaya,Talat Baran,Meltem Asan-Ozusaglam,Yavuz Selim Cakmak,Kabil Özcan Tozak,Abbas Mol,Ayfer Menteş,Göksal Sezen +7 more
TLDR
The results suggest that these two species, currently considered to be pests because of over-breeding, are potentially alternative sources of chitin and chitosan, which are used in the food/feed industry for their antimicrobial and antioxidant properties.Abstract:
This study examined two gregarious Orthoptera species (Calliptamus barbarus and Oedaleus decorus) as potential sources of chitin. The chitin content of the dry weight of C. barbarus was 20.5 ± 0.7%, and it was 16.5 ± 0.7% for O. decorus. Furthermore, the yield of chitosan (70 ~ 75% deacetylation degree) from the grasshopper species was found to be 74 ~ 76%, which is close to the yield of commercial preparations obtained from the unused parts of crabs and shrimp. The chitin and chitosan obtained in this way were analyzed using FTIR, TGA, XRD and SEM techniques, and the antimicrobial properties of chitosans obtained from C. barbarus and O. decorus against pathogenic microorganisms of humans and fish were investigated using the disc diffusion and microdilution broth methods. The antimicrobial screening procedures indicated that the chitosan showed significant antimicrobial activity against all of the tested pathogenic microorganisms. The MBC or MFC values were determined to be 0.16 ~ 2.50 mg/mL. The IC50 values for the chitins obtained from C. barbarus and O. decorus were 10.68 ± 0.27 and 10.91 ± 0.96 mg/mL, respectively, which were greater than the value for butylated hydroxytoluene (BHT): 0.04 ± 0.01 mg/mL. These results suggest that these two species, which are currently considered to be pests because of over-breeding, are potentially alternative sources of chitin and chitosan, which are used in the food/feed industry for their antimicrobial and antioxidant properties.read more
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Wound healing and antimicrobial effect of active secondary metabolites in chitosan-based wound dressings: A review
Arash Moeini,Parisa Pedram,Parisa Pedram,Pooyan Makvandi,Mario Malinconico,Giovanna Gomez d'Ayala +5 more
TL;DR: Almost all studies regarding natural compounds applications in wound healing by focusing on the chitosan-based bioactive wound dressing systems are collected, and the influence of bioactive compounds on their wound healing properties are reported.
Journal ArticleDOI
Physicochemical properties and characterization of chitosan synthesized from fish scales, crab and shrimp shells.
TL;DR: Prepared chitosan was characterized by Fourier transforms infrared spectroscopy, X-ray powder diffraction, Scanning electron microscope and Thermogravimetric analysis and TGA results demonstrated the lower thermal stability of chitOSan.
Journal ArticleDOI
Current Status and New Perspectives on Chitin and Chitosan as Functional Biopolymers
TL;DR: The present review discusses the potential bioextraction of chitosan from fungal, insect, and crustacean as well as its superior physico-chemical properties and highlighted new perspectives on the production of Chitin and deacetylated chitan from different sources with the concomitant reduction of the environmental impact.
Journal ArticleDOI
Recent advancements in applications of chitosan-based biomaterials for skin tissue engineering
TL;DR: This article overviewed the promising biological properties of chitosan and further discussed the various preparation methods involved in chitOSan-based biomaterials that were extensively employed in skin tissue engineering.
References
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Studies on products of browning reaction--antioxidative activities of products of browning reaction prepared from glucosamine
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Journal ArticleDOI
Chitin and chitosan: Properties and applications
TL;DR: Chitin is the second most important natural polymer in the world as mentioned in this paper, and the main sources of chitin are two marine crustaceans, shrimp and crabs, which are used for food, cosmetics, biomedical and pharmaceutical applications.
Journal ArticleDOI
Antimicrobial properties of chitosan and mode of action: A state of the art review
TL;DR: The paper reviews the current trend of investigation on antimicrobial activities of chitosan and its mode of action and different physical states are comparatively discussed.
Journal ArticleDOI
Antibacterial activity of chitosans and chitosan oligomers with different molecular weights.
TL;DR: Antibacterial activities of chitosan was inversely affected by pH (pH 4.5-5.9 range tested), with higher activity at lower pH value, and bactericidal effects with gram-positive bacteria than gram-negative bacteria in the presence of 0.1% chitOSan.
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