Chitin nanofibers (CNFs) are mainly extracted from crab and prawn shells [1, 2] and recetly found in small amount in edible species of mushrooms [3]. CNFs are composed of chitin compound. Chitin in powder form is obtained from fish industry wastes which is otherwise thrown as industrial waste. Since CNFs are biodegradable having typical width 10-20 nm and large surface-to-mass ratio thus they a...

Chitin is a natural polymer found abundantly in the shells of crustaceans, insects and in fungi. Chitin and its deacetylated product chitosan are commercially manufactured from shells of shrimp and crab. Four experimental diets containing 0 (control), 10, 25 and 50 mg/kg chitin were prepared in the laboratory from a commercial pellet diet. A total of 50 rainbow trout were divided randomly into ...

This study examined the effects of sub- and supercritical water pretreatments on the physicochemical properties of crab shell α-chitin and its enzymatic degradation to obtain N,N'-diacetylchitobiose (GlcNAc)2. Following sub- and supercritical water pretreatments, the protein in the crab shell was removed and the residue of crab shell contained α-chitin and CaCO3. Prolonged pretreatment led to α...

Dispersions of colloidal particles in aqueous media are widely investigated because of their use in many industrial applications (foods, pharmaceuticals, cosmetics, paints, etc.). Acid-hydrolyzed chitin has been reported to spontaneously disperse into colloidal rod-like crystalline particles, which can form rigid structures. Such colloidal dispersions of acid-degraded chitin can undergo an isot...

Rational nanostructure design has been a promising route to address critical materials issues for enabling next-generation high capacity lithium ion batteries for portable electronics, vehicle electrification, and grid-scale storage. However, synthesis of functional nanostructures often involves expensive starting materials and elaborate processing, both of which present a challenge for success...

A protein/CaCO₃/chitin nanofiber complex was prepared from crab shells by a simple mechanical treatment with a high-pressure water-jet (HPWJ) system. The preparation process did not involve chemical treatments, such as removal of protein and calcium carbonate with sodium hydroxide and hydrochloric acid, respectively. Thus, it was economically and environmentally friendly. The nanofibers obtaine...

Large numbers of crab shells are disposed as food waste in the processing process. Chitin nanofiber (CNF) refers to chitin extracted from form ultrafine fibers that enable uniform dispersion water. We explored feasibility using CNF materials plant growth promoters. investigated effects application with fertilizer and its various methods on komatsuna cultivated Entisols Andosols materials. The s...

Chitosan (CS) was prepared from Artemia urmiana cyst shells using the same chemical process as described for the other crustacean species, with minor adjustments in the treatment conditions. The influence of modifications of the CS production process on the physiochemical and functional properties of the CS obtained was examined. The study results indicate that Artemia urmiana cyst shells are a...

background chitin and its derivatives (chitosan) are natural biopolymer produced from crustacean shell, which due to their active functional groups such as amine and hydroxyl have high ability to absorb heavy metals from water and wastewater. the aim of this study was to investigate zinc removal from aqueous solutions by using chitin extracted from shrimp shells. material and methods to study t...