0913 Hardening and microstructure of high protein nutrition bars made using whey protein isolate or milk protein concentrate

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 439-440 ◽  
Author(s):  
S. K. Hassan ◽  
D. J. McMahon
Keyword(s):  
Whey Protein ◽  
Milk Protein ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
High Protein ◽  
Protein Concentrate ◽  
Milk Protein Concentrate ◽  
Protein Nutrition

Modified water solubility of milk protein concentrate powders through the application of static high pressure treatment

2011 ◽  
Vol 79 (1) ◽  
pp. 76-83 ◽  
Author(s):  
Punsandani Udabage ◽  
Amirtha Puvanenthiran ◽  
Jin Ah Yoo ◽  
Cornelis Versteeg ◽  
Mary Ann Augustin
Keyword(s):  
High Pressure ◽  
Ambient Temperature ◽  
Milk Protein ◽  
Water Solubility ◽  
Sodium Caseinate ◽  
High Protein ◽  
Protein Concentrate ◽  
Milk Protein Concentrate ◽  
Enhanced Solubility ◽  
Micellar Casein

The effects of high pressure (HP) treatment (100–400 MPa at 10–60°C) on the solubility of milk protein concentrate (MPC) powders were tested. The solubility, measured at 20°C, of fresh MPC powders made with no HP treatment was 66%. It decreased by 10% when stored for 6 weeks at ambient temperature (∼20°C) and continued to decrease to less than 50% of its initial solubility after 12 months of storage. Of the combinations of pressure and heat used, a pressure of 200 MPa at 40°C applied to the concentrate before spray drying was found to be the most beneficial for improved solubility of MPC powders. This combination of pressure/heat improved the initial cold water solubility to 85%. The solubility was maintained at this level after 6 weeks storage at ambient temperature and 85% of the initial solubility was preserved after 12 months. The improved solubility of MPC powders on manufacture and on storage are attributed to an altered surface composition arising from an increased concentration of non-micellar casein in the milk due to HP treatment prior to drying. The improved solubility of high protein powders (95% protein) made from blends of sodium caseinate and whey protein isolate compared with MPC powders (∼85% protein) made from ultrafiltered/diafiltered milk confirmed the detrimental role of micellar casein on solubility. The results suggest that increasing the non-micellar casein content by HP treatment of milk or use of blends of sodium caseinate and whey proteins are strategies that may be used to obtain high protein milk powders with enhanced solubility.

scholarly journals Whey protein isolate and glycomacropeptide decrease weight gain and alter body composition in male Wistar rats

2008 ◽  
Vol 100 (1) ◽  
pp. 88-93 ◽  
Author(s):  
Peter J. Royle ◽  
Graeme H. McIntosh ◽  
Peter M. Clifton
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Weight Gain ◽  
Whey Protein ◽  
Wistar Rats ◽  
Body Weight Gain ◽  
Whey Protein Isolate ◽  
Protein Isolate ◽  
Whey Protein Concentrate ◽  
Protein Concentrate

The effect of feed protein type on body composition and growth has been examined. Evidence exists that whey protein concentrate is effective at limiting body fat expansion. The presence of caseinomacropeptide, a mixture of glycosylated and non-glycosylated carbohydrate residues, in particular glycomacropeptide (GMP) in whey protein concentrate may be important for this effect. The influence of whey protein isolate (WPI) and GMP on weight gain and body composition was examined by feeding Wistar rats ad libitum for 7 weeks with five semi-purified American Institute of Nutrition-based diets differing in protein type: (1) casein; (2) barbequed beef; (3) control WPI (no GMP); (4) WPI+GMP at 100 g/kg; (5) WPI+GMP at 200 g/kg. Body composition was assessed, and plasma samples were assayed for TAG, insulin and glucose. Body-weight gain was lower ( − 21 %) on the control WPI diet relative to casein, with a non-significant influence associated with GMP inclusion ( − 30 %), the effect being equivalent at both levels of GMP addition. Renal and carcass fat mass were reduced in the highest GMP diet when compared with WPI (P < 0·05). Plasma insulin was lowered by GMP at the highest addition compared with WPI alone ( − 53 %; P < 0·01). Plasma TAG in the WPI+GMP (200 g/kg) group were lower ( − 27 %; P < 0·05) than the casein and beef groups. In conclusion, GMP appears to have a significant additional influence when combined with WPI on fat accumulation. WPI alone appears to have the predominant influence accounting for 70 % of the overall effect on body-weight gain. Mechanisms for this effect have not been identified but food intake was not responsible.

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