Degumming: The initial refining unit operation applied to crude fish body oil to remove non-glyceride impurities, specifically hydratable and non-hydratable phospholipids (gums).
Involves heating the crude oil with hot water or dilute phosphoric acid ($0.1-0.2\%$) to hydrate the phospholipids into insoluble sludges that are removed by centrifugation.
Correct Option: Option 1 (Degumming).
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Q.102
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
Which technology is commonly used in intelligent packaging to monitor product freshness?
Freshness Monitoring with Biosensors in Intelligent Packaging:
Intelligent Packaging: Packaging systems capable of monitoring product condition, freshness, and quality during transport and storage.
Biosensors: Integrate biological receptors (enzymes, antibodies, or aptamers) coupled with physicochemical transducers to detect specific chemical spoilage markers (such as biogenic amines, hypoxanthine, or volatile nitrogenous compounds), displaying direct freshness status.
Correct Option: Option 4 (Biosensors).
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Q.103
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
Identify one of the drawbacks in the pulsed electric field for food processing
Pulsed Electric Field (PEF): A non-thermal preservation technology that applies short bursts of high-voltage electric fields ($15-40\text{ kV/cm}$) to cause electroporation and inactivation of microbial cell membranes.
Major Drawback: The presence of air or gas bubbles in the food liquid causes severe dielectric breakdown, dielectric field distortion, and dangerous electrical arcing (sparking) between the electrodes, scorching the food and damaging equipment.
Correct Option: Option 1 (Presence of bubbles).
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Q.104
Fish Processing Technology- ICAR JRF/SRF 2024
MCQ (Single Correct)+4−1
Which equation represents the relationship between equilibrium relative humidity (ERH) and water activity (a) in a food
system?
Fish scales consist of a collagenous fibril matrix impregnated with inorganic mineral deposits.
The mineral phase is composed of calcium-deficient Hydroxyapatite [$\text{Ca}_{10}(\text{PO}_4)_6(\text{OH})_2$], constituting approximately $40\% - 45\%$ of the dry scale weight, making fish scales a sustainable source for biomedical bone graft hydroxyapatite.
Correct Option: Option 1 (Hydroxyapatite).
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