Chitin nanocrystal (ChiNC) was fabricated based on p-toluenesulfonic acid -choline chloride deep eutectic solvent treatment. The obtained ChiNC was about 12-44 nm in width and 206-399 nm in length. The crystalline structure and the functional groups of ChiNC were maintained during the preparation process. Moreover, porcine pancreas lipase (PPL) was successfully immobilized onto the ChiNC to form the immobilized PPL (PPL@ChiNC). The resulting PPL@ChiNC has enzyme loading and activity recovery of 35.6 mg/g and 82.5%, respectively. The thermal stability, pH and temperature adaptabilities of PPL@ChiNC was improved, comparing with free PPL. The demonstrated DES treatment process was efficient for ChiNC preparation and the as-prepared ChiNC exhibited great potentials in biocatalysis and biomedical field.
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http://dx.doi.org/10.1016/j.carbpol.2019.02.092 | DOI Listing |
J Food Drug Anal
December 2024
Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan.
This study introduces an innovative bio-based sorbent bead crafted by integrating chitosan (CS) biopolymers, Fe(NO3)3 and polydopamine nanoparticles (PDA NPs) via glutaraldehyde crosslinking. The primary focus of this study was the concurrent separation of diverse tetracycline antibiotics (TCs), followed by rigorous reversed-phase liquid chromatography analysis. The fabricated CS/Fe@PDA sorbent beads were comprehensively characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy, revealing a surface rich in active carbon (C), nitrogen (N), and oxygen (O) moieties.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Tehran, Iran. Electronic address:
Chitosan, a versatile biopolymer derived from chitin, is increasingly recognized in the milk industry for its multifunctional applications in drug delivery, smart packaging, and biosensor development. This review provides a comprehensive analysis of recent advances in chitosan production techniques. These include chemical, biological, and novel methods such as deep eutectic solvents (DES), microwave-assisted approaches, and laser-assisted processes.
View Article and Find Full Text PDFPLoS One
December 2024
Department of Pharmaceutics, School of Pharmacy, Guilan University of Medical Sciences, Rasht, Iran.
Objectives: Escherichia coli and Salmonella Typhimurium are frequent causes of foodborne illness affecting many people annually. In order to develop natural antimicrobial agents against these microorganisms, thyme oil (TO) was considered as active antibacterial ingredient. TO contains various bioactive compounds that exhibit antimicrobial properties.
View Article and Find Full Text PDFSci Rep
December 2024
Biotechnology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
Renal ischemia-reperfusion (I/R) injury is a common clinical factor for acute kidney injury (AKI). A current study investigated the renoprotective effects of the trinitroglycerine (TNG) combination with chitosan nanoparticles (CNPs) on renal I/R-induced AKI. Rats were randomly assigned to five groups (n = 8/group): Sham, I/R, TNG (50 mg/kg) + I/R, CNPs (60 mg/kg) + I/R, and TNG-CNPs + I/R.
View Article and Find Full Text PDFArch Razi Inst
June 2024
Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
In this study, the nano chitosan particles were produced by ionotropic gelation between sodium tripolyphosphate and chitosan. The effect of nano chitosan with or without sodium lactate coating was evaluated on physicochemical (pH, thiobarbituric acid, total volatile basic nitrogen, and peroxide), microbial (total mesophilic and psychrotrophic viable counts, lactic acid bacteria, yeasts, and molds), and sensorial properties of beef burgers within 24 days of storage at 4°C. The solutions of 1% nano chitosan (T), 2% nano chitosan (T), 2.
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