Removal of toxic heavy metals from wastewater is an important environmental challenge. In this Study, Zn (II) removal from aqueous solution by chitin extraction from crustaceous shells (shrimp and crab) was investigated. The biosorption studies were determined as a function of contact time, pH, initial metal concentration, and the amount of adsorbent. Adsorption of Zn (II) increased with decrea...

A new method for quick chitin isolation from the shells of crab, crayfish and shrimp is described. The main difference between the new method and the conventional method is two sodium hypochlorite (NaClO) treatments for 10 min each before the processes of demineralisation and deproteinisation. After the NaClO treatment, only 15 min is adequate for the demineralisation and 20 min for the deprote...

The green crab (Carcinus maenas) shell is the potential source for numerous bioproducts that are to be utilized in a variety of biomedical and biotechnology applications. Chitin and Chitosan are the most important materials from crab shells and its application in the design of various medical devices such as drug delivery vehicle and tissue engineering construct. Even though the well establishe...

Brown shrimp ( Crangon crangon ) shells and Chinese mitten crab Eriocheir sinensis were chemically demineralized deproteinized (denoted as M1 to M4 for the M5 M7 crab), torrefied at 200 300 °C R200, R255, R300), compared with a commercially available chitin source reference chitin). Based on their chemical characteristics, selection of sources was tested N mineralization capacity. The release h...

The crustacean exoskeleton presents several functions including the stabilization of the whole body of the animal, resistance to mechanical loads, and protection to the environment and against predators [1]. The structure of crustacean exoskeleton consists of an organic matrix constituted by α-chitin, proteins and carotenoid pigments and an inorganic fraction where calcium carbonate is the main...

The potential of chitin and its derivatives mainly chitosan extends to various existing and proposed applications in an unusually large number of fields. In the present study, the prospect for using the exoskeleton of cephalopods as a raw material for chitosan manufacture was tried out. This includes the extraction of chitin from the cuttlebone (by deproteinization and demineralization) and chi...

Chitin and chitosan oligosaccharides (COS) have been traditionally obtained by chemical digestion with strong acids. In light of the difficulties associated with these traditional production processes, environmentally compatible and reproducible production alternatives are desirable. Unlike chemical digestion, biodegradation of chitin and chitosan by enzymes or microorganisms does not require t...

Vibrio vulnificus is a bacterial contaminant of shellfish and causes highly lethal sepsis and destructive wound infections. A definitive identification of virulence factors using the molecular version of Koch's postulates has been hindered because of difficulties in performing molecular genetic analysis of this opportunistic pathogen. For example, conjugation is required to introduce plasmid DN...

Chitosan is a biocompatible, biodegradable, non-toxic, antibacterial, antioxidant, and antifungal natural polymer. In this study, chitin chitosan were chemically isolated from the exoskeleton of invasive swimming crab Charybdis longicollis. order to obtain chitin, demineralization, deproteinization, decolourization steps applied samples. was prepared by deacetylation at high temperatures. The c...

Chitin Nanocrystals nanomaterials are extracted from crab shells to stabilize bicontinuous emulsions by intra-phase jamming at ultra-low concentrations. In article number 2300686, Long Bai, Orlando J. Rojas, and co-workers show the merits of bio-based nanoparticles in forming complex multiphase systems, offering a new pathway achieve advanced hierarchical multiscale materials.