Chitosan oligosaccharides (COS) play a prebiotic role in many ways, whereas its function on microbiota is not fully understood. In this study, the effects of COS on metabolic syndrome were initially investigated by testing changes in the physiological indicators after adding COS to the diet of mice with high fat (group H) and low fat (group L). The results showed that COS markedly …
Read OnAbstract This study evaluated the effects of edible coatings and different packaging methods on the shelf-life and quality of walnut kernels. It focused on the coatings with chitosan (1%) and thyme essential oil (TEO) at concentrations of 500 and 1,000 μl L –1 (CT 500, CT 1,000) or with chitosan alone (CT).The effects of the coatings was assessed for different …
Read OnThis study was designed to explore the improvement of chitosan oligosaccharides (COS) on constipation through regulation of gut microbiota. Here, we proved that COS treatment profoundly boosted intestinal motility, restrained inflammatory responses, improved water-electrolyte metabolism and prevented gut barrier damage in constipated mice induced by …
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Read OnFurther, biomedical applications of chitin and chitosan nanofibers in (i) tissue engineering, (ii) wound dressing, (iii) cosmetic and skin health, (iv) stem cell technology, (v) anti-cancer ...
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Read OnIn this study, chitosan nanoparticles (CSNPs) and chitosan nanoparticles- botanical extracts: EEA-CSNPs (ethanolic blueberry extract added chitosan nano-particles) and EMN-CSNPs (extract methanol of nanche added chitosan nano-particles) were characterized and evaluated in vitro ongrowth of Alternaria alternata isolated from Fig and Rosemary and Colletotrichum …
Read OnNessa et al. (2010) extracted chitosan from sun-dried prawn shells by producing coarse particles in a centrifugal grinding machine. Some coarse …
Read OnFor in vivo tests, chitosan solutions were prepared by dissolving 0.5, 1.0, 1.5, and 2.0 g of chitosan powder in 0.5% acetic acid in 100 ml of final solution to yield final concentrations of 0.5%, 1.0%, 1.5%, and 2.0% (w/v) chitosan. In vitro evaluation of the fungicidal activity of chitosan Effects of chitosan on the mycelial growth and spore
Read OnFirst, bleached kraft pulp was adjusted to 3 wt%/v (3 g/100 ml) using either distilled water, or the previously chitosan solution of 1% in acetic acid as the solution, and was further fragmented using a 450 W blender for 10 min. Afterwards, it was subjected to further grinding using Super Masscolloider (Masuko Sangyo Co. Ltd., Japan).
Read On5.0 g of the chitosan powder with a size of 10 to 20 μm and 99% purity was passed through ultrasonic vibration (100 W, 40 KHz) and then electric arc. Next, the powder was transferred to a grinding machine. The grinding machine in our study had five containers and particles were collected in each container with sizes smaller than 900 nm, 600
Read OnChitosan is prepared by the deacetylation of chitin. Because of its biocompatibility and biodegradability as well as its cellular-binding, wound-healing, anti-bacterial, and anti-fungal properties, chitosan has great potential for many uses, including food, cosmetic, biomedical, and pharmaceutical applications [30,31,32,33,34]. The electro ...
Read OnHighlights Chitin and chitosan were prepared from shrimp shells. Antibacterial activity of chitin and chitosan oligomers were assessed. Chitosan exhibited a bacteriostatic effect on all bacteria tested. Due to their higher activity, oligomers were more soluble in water. Chito-oligomers showed advantages as new antimicrobial agents.
Read Onchitin is chitosan which is a copolymer of N-acetylglucosamine and glucosamine. Being least toxic, highly biodegradable and biocompatible, chitosan has increased attention as a promising biomaterial for various purposes (Naskar, Koutsu, and Sharma 2019). It finds various applications in the pharmaceutical and
Read OnThe tensile properties of CS/PEO and CS/PEO/CO nanofibers were investigated using a tensile testing machine (Instron 5566, Instron®, USA) at room temperature. Nanofibers were cut into strip-shaped (5 × 25 mm 2), placed in the machine and strained to rupture by a 10 N load cell with the crosshead speed of 10 mm/min. All tests were done in ...
Read OnThe antidiabetic and hypoglycemic effects of chitosan have been reported in previous studies. We have previously shown that chitosan oligosaccharide reduces postprandial blood glucose levels in vivo.
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Read OnChitin is insoluble in water; however, water-soluble chitosan (ChS) has been produced after a chitin deacetylation process. A ChS molecule contains an –NH 2 group and two –OH radicals in each glycoside residue. Although chitin is naturally produced at a rate of around 1010 tons per year, most chitin is thrown away as commercial waste [].Chitin is disposed of as …
Read OnSome scholars applied the grinding machine to the pretreatment of chitin and studied its effect on the preparation of chitin nanofibers from crab shell powder by the HPWJ system. The crushed chitin can be effectively decomposed into nanofibers after being treated by the HPWJ system, which reduces the treatment cycle of the HPWJ system.
Read OnChitosan (CS) is a natural polysaccharide isolated from insects, molluscs, and fungi. The specific properties of chitosan can be enhanced using physicochemical processes.
Read OnThe chitosan slurry was forced to pass through the wet-grinding machine at the flow rate of 10 L/h and then it was poured into the stainless-steel tank of a Microfluidizer (M-100P, Microfluidics Corp. MA, USA) equipped with a pair of ceramic (200 μm) and diamond (87 μm) interaction chambers; it was cooled and then released back to the tank ...
Read OnForms gels with multivalent anions. Gives clear solutions that dry to strong, clear films. Biocompatible, antibacterial and environmentally friendly polyelectrolyte with a variety of applications including water treatment, chromatography, additives for cosmetics, textile treatment for antimicrobial activity,novel fibers for textiles, photographic papers, biodegradable films,3 …
Read OnChitosan showed two diffraction peaks at 2θ = 10.2° and 19.8° with low intensity. PVA displayed three diffraction peaks at 2θ = 11.3°, 16.6°, and 22.6° (Figure 3 a). The samples showed four diffraction peaks (Figure 3 b); a broad diffraction peak centered at 2θ = 20°, two peaks with low intensity at 2θ = 10.2°, and at 27.4°, as well ...
Read OnThis optional step of grinding the chitin is described more fully in step 8 of the detailed method for obtaining chitin and/or chitosan according to the invention hereafter. The grinding step can also be performed in order to promote the deacetylation reaction, which makes it possible to prepare chitosan from chitin.
Read OnIn this study, response surface methodology (RSM) and artificial neural network (ANN) was used to construct the predicted models of linear, quadratic and interactive effects of two independent variables viz. salicylic acid (SA) and chitosan (CS) for the production of amarogentin (I), swertiamarin (II) and mangiferin (III) from shoot cultures of Swertia paniculata …
Read OnThe color of chitosan (M 1 and M 2) was unchanged after biuret test which indicate the absence of protein ().. The total production of shrimp and prawn was 61709 MT and 51571 MT in the year of 2017-18, respectively. According to this study, about 49.34 and 62.65% co-products are produced from shrimp and prawn, respectively.
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