Potential of chicken by-products as sources of useful biological resources.

Fatty acid composition of horse mackerel (Magalaspis cordyla) and croaker (Otolithes ruber)

Summary

In our present investigation, Nemipterus japonicus and Exocoetus volitans backbone protein were hydrolysed by proteases like trypsin and pepsin, respectively. The protein hydrolysates were purified by different chromatographic methods, and the resulted purified peptides were analysed for their amino acid sequences by electrospray ionisation–MS/MS. The analysis of peptides showed sequences as Gly-His-Met-Ser (451.8 Da) and Leu-Glu-Val-Lys-Pro (596.9 Da) for N. japonicus and E. volitans muscle, respectively. The presence of hydrophobic amino acids contributes more to the antioxidant activities of peptides than other amino acids. Moreover, sequence of amino acids in peptides plays an important role in their antioxidant activities.

Identification of active peptides from backbones of Nemipterus japonicus and Exocoetus volitans by electrospray ionisation–mass spectrometry

Indian butter catfish (Ompok bimaculatus, Bloch, 1794) comes under the order Siluriformes and family Siluridae. The specific name bimaculatus implies the two spots on anterior sides. In global market this species is known as the two spot glass catfish International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 8 Number 03 (2019) Journal homepage: http://www.ijcmas.com

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Biochemical and Histological Change during Chilled Storage in Farmed Raised and Wild Indian Butter Catfish (Ompok bimaculatus Bloch, 1794)

In order to evaluate its nutritive value, seasonal variation in total lipid and fatty acid profiles of different sizes of threadfin breams (Nempiterus mesoprion and N. japonicus) were studied. Total lipid content was significantly (P<0.05) high in large sizes of N. mesoprion and N. japonicus captured during winter and lowest in small groups during post-monsoon season. A total of 37 fatty acids were identified by GC-MS encompassing saturated, mono unsaturated, n-6, n-3 poly unsaturated and odd and branched chain fatty acids. High levels of n-3 PUFA (13.37 – 36.27%) and favourable n-3/n-6 PUFA ratio of 2.25 to 3.3 revealed nutritional significance of threadfin breams in human diet. Difference between small, medium and large groups of N. mesoprion and N. japonicus of respective seasons based on fatty acid composition were clearly established by principal component analysis.

http://nopr.niscair.res.in/bitstream/123456789/35089/1/IJMS%2045%285%29%20696-702.pdf

S easonal variation in fatty acid profiles of threadfin breams, Nemipterus mesoprion (Bleeker, 1853) and Nemipterus japonicas (Bloch, 1791) with respect to their size

Present study of the lipid content in different organs of marine fish Threadfin bream ( Nemipterus japonicus ) indicates that a major amount of lipids are accumulated in liver (6.22%) when compared with remaining organs like muscle (2.7%) and skin (1.0%). Cholesterol studies reveal that muscle (36.2%) is having more quantities than liver (32.4%) and skin (24%). Fatty acid composition reveals that the lipids of each organ of threadfin bream are enriched in the unsaturated fatty acids and all the organs were found to be rich in linoleic (C 18: 2 ), oleic (C 18:1 ) and palmitic (C 16: 0 ). The present study further elucidates that a considerable amount of two physiologically important n-3 PUFAs, i.e. EPA and DHA were found more in skin (1.6% and 0.5%) and liver (1.6% and 0.6%) than in muscle (1.4% and 0.4%).

/pdf/lipid-profiles-of-threadfin-bream-nemipterus-japonicus-1hsts87cvi.pdf

S. Y. Naqash

Papers

Lipid profiles of Threadfin bream ( Nemipterus japonicus ) organs