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Gelatin was extracted from 3 (body, foot, and viscera) different body parts of Ficus variegata using an alkaline treatment. Composite scaffolds were prepared for tissue engineering applications. Proximate analysis of F. variegata prior to extraction showed percentage values of 16.67–14.33% for protein, 74.53–72.72% for moisture, 3.63–2% for ash, and 2.33–0.33% for lipids. Extracted gelatin was characterized using Fourier transform infrared (FTIR), SDS-PAGE, and amino acid analysis. Composite scaffolds using alkali treated gelatin of all 3 body parts with 4 different commercial cross-linkers [chitosan, hydroxy apatite (HA), glutaraldehyde, and nano hydroxy apatite (nHA)] were prepared and structural morphology and porosity were analyzed using scanning electron microscopy (SEM). The nHA blended gelatin scaffolds had a pore size ranging 1–10 μm. The swelling ratio, in vitro degradation, and the protein adsorption capacity was observed to be high in chitosan blended gelatin scaffolds.

The objective of this study was to determine the physicochemical and nanostructural properties of the alkali pre-treated gelatin from 3 different body parts (skin, muscle, and bone) of cornet fish (Fistularia petimba). The maximum yield of protein and viscosity was obtained in bone than other parts and Fourier transform infrared (FTIR) spectroscopy was carried out to characterize the extracted gelatin. Prior to extraction, the proximate composition was investigated clearly and the percentage of protein (15.50–29%), ash (4.32–6.50%), moisture (71.85–79.20%), and lipid (0.36–1.38%) content were estimated. Morphology of alkaline gelatin extracted from skin, muscle, and bone were studied using atomic force microscopy (AFM). The AFM images represented the scanning was done at 1.9 μm, 510, and 110 nm for skin, muscle, and bone, respectively showed the separate individual aggregates and the nano size particles of 0.17 μm, 100, and 219 nm, respectively. Amino acids like glycine, proline, and hydroxyproline were found with highest level in all the body parts of the extracted gelatin using HPLC.