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RISS 인기검색어
- 검색키워드
- 저자 : R.A. Nazeer (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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R.A. Nazeer,M. Kavya Deepthi 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.1
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.
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R. Jai ganesh,R.A. Nazeer,N.S. Sampath Kumar 한국식품과학회 2011 Food Science and Biotechnology Vol.20 No.4
To utilize fish waste, black pomfret, Parastromateus niger viscera was analysed for its proximate and amino acid composition followed by hydrolysis using various proteases to extract antioxidant peptide. Antioxidant activities of the crude hydrolysate was evaluated using DPPH (54%), metal chelating (78.6%) at a concentration of 1 mg/mL, whereas the reducing power assay was done with different concentration (0.5-2.5 mg/mL) and the activity also increased with increasing concentration (0.021-0.068). Furthermore, the hydrolysate was purified by diethylaminoethyl (DEAE) ion-exchange and Sephadex G-25 gel filtration chromatography. Finally, the purified peptide had a mass of 701.9 Da, and the amino acid sequence was identified as Ala-Met-Thr-Gly-Leu-Glu-Ala using electrospray ionization-tandem mass spectrometry (ESI-MS/MS). Moreover, the protection ability of the peptide toward hydroxyl radical-induced oxidative DNA damage and inhibiting lipid peroxidation was evaluated and compared with natural antioxidant α-tocopherol.
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R.A. Nazeer,U. Sri suganya 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.2
Gelatin was extracted from 3 (body, foot, andviscera) different body parts of Ficus variegata using analkaline treatment. Composite scaffolds were prepared fortissue engineering applications. Proximate analysis of F. variegata prior to extraction showed percentage values of16.67-14.33% for protein, 74.53-72.72% for moisture,3.63-2% for ash, and 2.33-0.33% for lipids. Extractedgelatin was characterized using Fourier transform infrared(FTIR), SDS-PAGE, and amino acid analysis. Compositescaffolds using alkali treated gelatin of all 3 body parts with4 different commercial cross-linkers [chitosan, hydroxyapatite (HA), glutaraldehyde, and nano hydroxy apatite(nHA)] were prepared and structural morphology andporosity were analyzed using scanning electron microscopy(SEM). The nHA blended gelatin scaffolds had a pore sizeranging 1-10 μm. The swelling ratio, in vitro degradation,and the protein adsorption capacity was observed to behigh in chitosan blended gelatin scaffolds.
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