Shrimp waste is a perishable material. The degradation process carried out by decaying microbes producing degrading enzymes. presence of chitin content in shrimp causes the emergence chitinase enzyme-producing bacteria. Chitin linear homopolymer composed N-acetyl-D-glucosamine monomers with -(1,4) glycosidic bonds. has unique properties, namely; biodegradable, biocompatible and non-toxic. This ...

Characterization and Antibacterial Activity of Nanochitosan -Nisin Biocomposite Film Prepared from Shrimp Shells

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...

Chitosan is a derivative of chitin, the second most abundant natural polymer on earth after cellulose. It is the major component of skeletal or exoskeletal structure of lower animals, particularly crustacea, molluscs and insects. It is also present in a vast majority of fungi as the principle fibrillar polymer of the cell wall. Fungal cell walls and septa of Extraction of chitosan from fungi is...

In this study, the chitin and chitosan were extracted from shrimp shell through two-steps acid alkaline treatment. The was deproteinized by 1 M of sodium hydroxide demineralised 1%, 2%, 3%, 4% 5% hydrochloric acid, respectively. produced characterized FTIR FESEM. depicted that in α-chitin isomorph. surface morphology found to increase with an concentration. film rod-like micro-structure when di...

The effectiveness of three immunostimulants viz., vitamin C, levamisole and chitin on the prophenoloxidase (proPO) activity of haemolymph, response to challenge studies and growth performance of juveniles of the tiger shrimp Penaeus monodon (Fabricius) was assessed by oral administration of these immunostimulants to the shrimps. The levels of incorporation of these immunostimulants in shrimp fe...

Mantis shrimp are renowned for their unusual method of breaking shells with brief, powerful strikes of their raptorial appendages. Due to the extreme speeds of these strikes underwater, cavitation occurs between their appendages and hard-shelled prey. Here we examine the magnitude and relative contribution of the impact and cavitation forces generated by the peacock mantis shrimp Odontodactylus...

White spot syndrome virus (WSSV) is a major pathogen of penaeid shrimp. Here we identified a new WSSV strain, WSSV-CN04, from naturally infected Marsupenaeus japonicus. Whole genomic sequencing results indicate that the WSSV-CN04 genome was 281 054 bp in length, and encoded 157 hypothetic proteins. The genome sequence of WSSV-CN04 was most closely related to the low-virulent strain WSSV-CN03, s...

Eight fungal species characterized by chitinolytic activity were isolated from Egyptian black sand collected from Rosetta coast. Genus Aspergillus and Alternaria alternata exhibited the highest density (> 40% of the total count, each) on the isolation plates containing different treatments of native shrimp shell chitin. Genus Aspergillus was represented by A. flavus, A. niger, A. foetidus and A...

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...