SYNTHETHIC, PHYSIOCHEMICAL AND FUNCTIONAL PROPERTIES OF CHITOSAN FROM CRAB SHELL WASTES IN LAGOS ...

In coastal West Africa, the blue crab (Calilinectes amnicola), which belongs to the phylum arthropoda, is a popular food item. Its by-products, like as shells, can be utilised to make value-added products such as chitin, chitosan, and carotenoid pigments. Chitosan is a major component of the shells of crustaceans such as shrimp and crabs and is one of the most prominent chitin derivatives. The goal of this study was to look at the physicochemical properties of crab shell debris from the Lagos Lagoon in Nigeria. Physicochemical traits such as 1) The ash content of the sample was determined by heating it in a muffle furnace at 550°C for 2 hours until it reached a consistent weight. The crucible was subsequently cooled, the weight determined, and the ash content in percent computed, which came out to be 0.3 percent. 2) Moisture content was calculated using the gravitational method and found to be 10.99%. 3) Solubility was evaluated by mixing 0.1 gm in a centrifuge tube with 10 mls of 1% acetic acid, centrifuging the solution, decanting the supernatant, drying the undissolved at 60°C, weighing it, and determining the percent solubility, which was found to be insoluble. 4) The dry weight of crab shells before treatment and the dried weight of prepared chitosan after treatment were used to calculate the yield of prepared chitosan, which was found to be 13.00 percent. 5) A Fourier Transform Infrared (FTIR) instrument with a frequency of 4,000–400 cm-1 was used to estimate the degree of de-acetylation, which was found to be 49.65. 6) The protein content was evaluated using the AOAC 2005 technique and was found to be 31.62 percent, while the fat content was determined using the continuous extraction method using the Soxhlet extractor apparatus and was found to be 2.4 percent. Mineral content was determined using AOAC and indicated a small amount because some were undiscovered, with the exception of zinc and iron, which had values of 4.77 and 5.28, respectively. Our findings revealed the utility of several chitosan parameters extracted from crab shell waste from the Lagos lagoon.

Please see the link :- https://www.ikprress.org/index.php/JACSI/article/view/3391