Lecithination in Instant Milk Powder Manufacturing:
Role of Lecithin:
In instant whole milk powder production, lecithin (phosphatidylcholine fraction) dissolved in butter oil is sprayed onto warm powder granules ($0.2\%$ by weight).
Serves as an amphiphilic surfactant that coats surface free fat, lowering interfacial tension and promoting rapid capillary water penetration, wettability, and sinkability in cold water.
Conclusion: Lecithin (Option 4).
Correct option: (4) Lecithin
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2
ICAR JRF Dairy Chemistry 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
Amongst following milk products, the richest source of phospholipids of is
Milk phospholipids are predominantly concentrated in the Milk Fat Globule Membrane (MFGM).
During churning of cream into butter, mechanical agitation ruptures fat globule membranes, releasing MFGM polar lipid fragments into the aqueous buttermilk.
Consequently, buttermilk is the richest dairy source of phospholipids ($0.15 - 0.20\%$, or $\approx 5\times$ higher than whole milk).
Conclusion: Butter milk (Option 2).
Correct option: (2) Butter milk
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