PREPARATION OF GELATIN DERIVED FROM FISH SKINS OF FISH SPECIES, CIRRHINUS MRIGALA (NGA-GYIN) AND NOTOPTERUS CHITALA (NGA-PHE) AND THEIR CHARACTERIZATION
Abstract
- The aim of the research work is the isolation of gelatin powder from Cirrhinus mrigala (Nga-gyin) and Notopterus chitala (Nga-phe) fish skin. Gelatin was derived from the thermal degradation of collagen, which is the principal protein found in skin and bones. Gelatin was extracted by acid treatment and confirmed by FT IR analysis. The physicochemical properties of prepared gelatin such as moisture content, ash content, pH and solubility in water, colour appearance, odour description, viscosity, gelling and melting temperatures were also determined. The yield percent of prepared gelatin from Nga-phe skin was greater than that of Nga-gyin skin. The prepared gelatin was characterized by Fourier Transform Infrared (FT IR) spectrophotometer, Scanning Electron Microscopy (SEM) and Thermogravimetric-Differential Thermal Analysis (TG-DTA). FT IR analysis showed the chemical bond formation of gelatin. Morphological investigation showed that the Nga-gyin skin (Ngy) exhibited sponge or coral structure and the surface of Nga-phe skin (Nph) had denser strand with small pores. TG -DTA data showed three steps of degradation. The initial degradation was due to moisture, the second was due to thermal degradation of composite and the third was denaturing of protein. Therefore, the use of fish skin waste as raw material in the gelatin production is quite potential and plays a major role in recycling of waste.
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Year
- 2021
Author
-
Chang Myaw
Subject
- Chemistry
Publisher
- Myanmar Academy of Arts and Science (MAAS)