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20224
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Subject: Fish Processing Technology × End date: 2022 × Start date: 2022 ×
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    ThesisItemOpen Access
    HEAT PENETRATION CHARACTERISTICS AND THE QUALITY OF READY TO EAT PANGASIUS FISH FILLETS CHUNKS (PANGASIUS HYPOPTHALMUS) IN MASALA USING FLEXIBLE RETORT POUCHES
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) TEKADE VYANKATESH DEVENDRAKUMAR; B.MANJANAIK
    Pangasius fish fillet chunks in masala is a famous south Indian dish prepared using Pangasius fish (Pangasius hypopthalmus) in the culinary style. The present investigation was aimed to optimize different Fo values of the Pangasius fillet chunks in masala packed in flexible retortable pouches. The product was thermally processed at different lethality and heat penetration characteristics indicating similar heating and cooling lag factor. Fh value was 13 and 16.5 min for the product processed at Fo values of 7.37 and 8.12 min, respectively. Total processing time was 26.94 and 31.37 min, respectively, for Fo 7.37 and 8.12 min. Cook value of the processed product was 64.70 min for Fo 7.37 min and 65.87 min for Fo 8.12 min. All instrumental texture parameters showed decreasing trend upto storage period of 90 days. Based on the organoleptic evaluation, product processed at Fo 7.37 min was rated better. Key words: Pangasius fillet chunks in masala, Fo value, texture profile analysis, retortable pouches, cook value, total process time
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    ThesisItemOpen Access
    STUDIES ON FUNCTIONAL FISH SAUSAGE – ITS CHARACTERISTICS AND SHELF LIFE
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) RAJU KENNAUJE; S.SIDDAPPAJI
    In the present study ready to eat, nutrient rich functional fish sausage was developed to enhance consumers health by suitably modifying the ingredient’s composition of traditional standard Japanese fish sausages, with the objectives for Comparative studies between conventional standard fish sausage and functional fish sausage packed in fibrous and krehalon casing and to study the quality changes in both the product’s during storage at ambient (29± 2℃) (AT) and refrigerated storage (6±2 ℃) temperature (RT). Rohu minced meat was prepared from rohu fillet with meat yield of 30% and 54% respectively. Freshness of fish was assessed by organoleptic, biochemical, and microbiological methods. The protein content of meat and bajra flour incorporated fish sausages was 18.68% and 14.59% in C1 and 14.05% in T1 respectively. functional fish sausage was prepared using rohu minced meat, bajra millet flour+ oats (12%), fish oil + vegetable oil (2.5% each), and spice mixture (1.5%), packed in fibrous and synthetic casing, heat processed, cooled and stored. Sample were drawn, every day and once in 7 days for products stored at AT and RT respectively. Fish sausage is a ready to eat protein rich product. The changes in physical (texture, colour, gel strength, folding test), biochemical (PV, FFA, pH TVBN), microbiological (TPC, spore counts) and sensory characteristics of all the products were compared with traditional fish sausages. Products stored at 6±2℃ recorded a very slow rise in biochemical, and decrease in gel strength and organoleptic scores, with increase in storage period. microbial count was higher in fibrous casing products then synthetic casing products. At both storage temperature the self-life of control and functional fish sausages was 2 and 21 days respectively.
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    ThesisItemOpen Access
    COMPARATIVE STUDY OF USING DIESEL AND BIO-DIESEL IN A SINGLE CYLINDER DIESEL ENGINE
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) DONADKAR RUJUTA RAJENDRA; SHASHIDHAR H. BADAMI
    In fact the concept of using biodiesel was known since 18th century but now in recent years it is gaining more popularity due to the facts that the depletion of fossil fuels, environmental effect, global warming, the stringent emission standards and international crises of fossil fuels have forced the world to find an alternative fuels. Biodiesel is one of the most important alternative fuel to fossil fuels mainly because it is renewable, nontoxic and environmental friendly and it seems to be a solution for the fossil fuel. The biodiesel can be used in an internal combustion engine with little or no modification to the engine. So based on the importance of use of biodiesel in an internal combustion engine, a comparative study of using diesel and biodiesel tests were conducted as per the Bureau of Indian standard . The tests were conducted by varying the load from no load to full load for standard diesel and for four biodiesels such as Indizel, Dairy Scum Biodiesel [DSB], Waste Vegetable Oil [WVO], and Pongamia Pinnata (Honge) in different blended ratios like B25, B50, B75, B100. Among all Biodiesels, Dairy Scum Biodiesel has received more attention. A maximum BP of 4.504 kW was observed than neat diesel, BSFC of Indizel B75 was higher than diesel i.e., 0.681 kg/kW/hr, Brake Thermal Efficiency of DSB was 30.05 % as compared with other Biodiesels. The least and highest unaccounted heat loss among four biodiesels were DSB B75 [346.49 kJ/kg] and DSB B50 [763.8 kJ/kg] respectively as compared with that of standard diesel [445.37 kJ/kg]. Mann Whitney (U test) was done for all the biodiesels independently. However, DSB, Indizel (B75)and DSB (B75) have shown good value in terms of BP, BSFC and unaccounted heat loss respectively as compared to standard diesel, which is the significant contribution of biodiesels in terms of their performance parameters are concern.
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    ThesisItemOpen Access
    STUDY ON THE INFLUENCE OF FABRICATED VERTICAL PERFORATED CYLINDRICAL AERATOR MODEL ON THE GROWTH OF AQUATIC ORGANISMS
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) DESHBHRATAR DIPALI RAVINDRANATH; VARADARAJU S.; DESHBHRATAR DIPALI RAVINDRANATH
    Aquaculture is the fastest growing food industry in the world. Dissolved Oxygen (DO) concentration is the most important and critical water quality parameter in fish culture because of its direct effect on the feed consumption and metabolism of aquatic animals as well as indirect influence on the water quality. The cost of the mechanical aerators is more and it requires more operational and maintenance cost. So by keeping the above points in view an effort is being made to design and fabricate the vertical perforated cylindrical aerator model. The present study was conducted to assess the influence of the above aerator model on the growth of the aquatic animals. Totally six uniform sized cement tanks each having an area of 25 m2 (5 x 5 x 1 m) were selected for the study in the Research and Instructional Fish Farm at College of Fisheries. In a set of three tanks water was aerated using the above aerator model for the duration of three hours per day and other three tanks were non-aerated which served as control. The preparation of tanks was carried by following the standard procedure and water was filled for a depth of 80 cm. After fifteen days of initial fertilization, thirty uniform- sized fingerlings of common carp (Cyprinus carpio) was stocked in all the tanks for the duration of 105 days. The water sampling was carried out fortnightly in the early morning to study the changes in physical and chemical parameters, the important parameters such as dissolved oxygen, pH, ammonia, free carbon dioxide, nitrate-nitrogen, alkalinity, total-phosphorus, hardness and temperature were tested following the standard procedure. Fish sample was also collected fortnightly during the culture period to study the changes in length and weight gain. Based on the result obtained the DO content in the aerated tanks water was higher during the study period compared to non-aerated tanks water. There is not much variation in the water quality parameters both in the aerated tanks and non-aerated tanks, the same 88 were within the permissible limit required for aquaculture. In the aerated tanks, an average length and weight of the common carp increased from (4.79 ± 0.31 to 24.34 ± 0.46 cm, 5.67 ± 0.06 to 249.65 ± 9.65 g ), while in control tanks it varied from (4.81 ± 0.34 to 23.50 ± 0.23 cm, 4.97 ± 0.29 to 215.57 ± 10.28 g) respectively. It was observed that the growth of common carp (Cyprinus carpio) was higher in aerated tanks when compared to nonaerated tanks. From the present study, it can be concluded that the use of above aerator model can be an efficient aeration system for increasing the DO level in the pond water and there by increasing growth, survival and overall production of fish ultimately increase the profit of the farmers. Key words: Aeration, Dissolved oxygen, Growth performance