Προσδιορισμός λιπιδίων και μετάλλων σε βρώσιμα υδρόβια
Τhe aim of the present doctoral thesis was to compare the bioactive lipid constituents as well as the metals and metalloids of three different shrimp species (Aristaeomorpha foliacea Parapenaeus longirostris and Pandalus borealis). The shrimp present a high nutritional interest, as they contain sign...
| Main Authors: | , |
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| Format: | Doctoral or Postdoctoral Thesis |
| Language: | Greek |
| Published: |
National and Kapodistrian University of Athens
2017
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10442/hedi/47031 https://doi.org/10.12681/eadd/47031 |
| Summary: | Τhe aim of the present doctoral thesis was to compare the bioactive lipid constituents as well as the metals and metalloids of three different shrimp species (Aristaeomorpha foliacea Parapenaeus longirostris and Pandalus borealis). The shrimp present a high nutritional interest, as they contain significant amounts of fuctional lipid substances such as ω-3 fatty acids, carotenoids, phospholipids etc. which are widely used in the production of pharmaceutical and nutritional products refered as “nutraceutical”. The presence and the composition of nutraceuticals depends on the quality and theconsumption of phytoplankton and zooplankton, as well as the area of caught. This work includes four experimental parts. To the first experimental part (chapter 6) the two Mediterranean shrimp species, A. foliacea and P. longirostris were assessed in respect to essential nutrients, fatty acids and carotenoids. Various analytical methods were used such as TLC, GC and HPLC. The results indicated that the ω-3/ω6 polyunsaturated fatty acids ratio in A. foliacea and P. longirostris muscle lipids exhibited considerable values (>2.9), indicating a healthy diet. Regarding carotenoids,astaxanthin was the most prevalent, already correlated with antioxidant support to nervous and musculoskeletal systems, followed by lutein, canthaxanthin, zeaxanthin, α- and β-cryptoxanthin. Phosphatidylcholine and polyunsaturated fatty acids predominated in shrimps’ muscle lipids, while monounsaturated fatty acids in cephalothorax. Palmitic, oleic and the essential eicosapentaenoic (C20:5ω-3) and docosahexaenoic (C22:6ω-3) acids were also present fulfilling the high nutritionalprofile of both shrimps. To the chapter 7, the concentrations of some hazardous elements as well as and the bioactive fatty acid profiles in the muscle and cephalothorax of P. longirostris (Mediterranean shrimp) and of P. borealis (northern shrimp) were comparatively studied. The deterimation of the elements was made by using ICPMS. Total As was detected at high levels in all ... |
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