Water-soluble low-molecular-weight (3-10 kDa) chitosan obtained by enzymatic degradation of high-molecular-weight chitosan, as well as its deaminated derivatives, can be used as elicitors of late blight resistance in potato.
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Development of a Sustainable Flexible Humidity Sensor Based on Larvae Biomass-Derived Chitosan.
Sensors (Basel)
January 2025
Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea.
This study presents the fabrication of a sustainable flexible humidity sensor utilizing chitosan derived from mealworm biomass as the primary sensing material. The chitosan-based humidity sensor was fabricated by casting chitosan and polyvinyl alcohol (PVA) films with interdigitated copper electrodes, forming a laminate composite suitable for real-time, resistive-type humidity detection. Comprehensive characterization of the chitosan film was performed using Fourier-transform infrared (FTIR) spectroscopy, contact angle measurements, and tensile testing, which confirmed its chemical structure, wettability, and mechanical stability.
View Article and Find Full Text PDFChitosan Micro/Nanocapsules in Action: Linking Design, Production, and Therapeutic Application.
Molecules
January 2025
Department of Chemical Engineering, Universitat Rovira i Virgili, Av. Països Catalans 26, Campus Sescelades, 43007 Tarragona, Spain.
pH sensitivity of chitosan allows for precise phase transitions in acidic environments, controlling swelling and shrinking, making chitosan suitable for drug delivery systems. pH transitions are modulated by the presence of cross-linkers by the functionalization of the chitosan chain. This review relays a summary of chitosan functionalization and tailoring to optimize drug release.
View Article and Find Full Text PDFChitosan-Based Schiff Bases (CSBs) and Their Metal Complexes: Promising Antimicrobial Agents.
Molecules
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Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy.
The scientific interest in the chemical modification of chitosan to increase its solubility and application has led to its conjugation with Schiff bases, which are interesting scaffolds endowed with diverse biological properties. The resultant chitosan-based Schiff bases (CSBs) are widely studied in scientific literature due to the myriad of activities exerted, both catalytic and biological, including anticancer, anti-inflammatory, antioxidant, and especially antimicrobial ones. Antimicrobial resistance (AMR) is one of the major public health challenges of the twenty-first century because it represents a threat to the prevention and treatment of a growing number of bacterial, parasitic, viral, and fungal infections that are no longer treatable with the available drugs.
View Article and Find Full Text PDFChitosan and Its Nanoparticles: A Multifaceted Approach to Antibacterial Applications.
Nanomaterials (Basel)
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Department of Molecular Biology and Genetics, Çanakkale Onsekiz Mart University, Çanakkale 17100, Türkiye.
Chitosan, a multifaceted amino polysaccharide biopolymer derived from chitin, has extensive antibacterial efficacy against diverse pathogenic microorganisms, including both Gram-negative and Gram-positive bacteria, in addition to fungi. Over the course of the last several decades, chitosan nanoparticles (NPs), which are polymeric and bio-based, have garnered a great deal of interest as efficient antibacterial agents. This is mostly due to the fact that they are used in a wide variety of applications, including medical treatments, food, chemicals, and agricultural products.
View Article and Find Full Text PDFAcrylpimaric acid-modified chitosan derivatives as potential antifungal agents against Valsa Mali.
Carbohydr Polym
March 2025
College of Chemical Engineering, Huaqiao University, Xiamen 361021, China.
In order to the antifungal activity of chitosan (CS) and to obtain a better natural bio-antimicrobial agent, CS was modified with acrylpimaric acid (APA). The grafting sites of APA on CS were controlled by adjusting the reaction time and the ratio of reactants to obtain APA grafted with CS C-NH (NCSAA) and C-OH (CSAA). Intermediates to protect C-NH (PMCSAA) and final sample derivatives (PCSAA) were prepared using phthalic anhydride.
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