Solubility of MPC/MPI is an important quality characteristic that determines how successful the product will be in various applications. This important product attribute can be affected by several process parameters including freshness of the raw milk prior to processing, processing conditions, and length/conditions of storage. In order to maximize MPC solubility it’s important to minimize…
In analyses by outside laboratories, NSI results for MPC powders were found to range from a low of 35 to a high of 72. NSI results for three separate lots of Idaho Milk Products’ IdaPro® MPC powders ranged from 67 to 72. An outside laboratory also analyzed MPC powders for WPNI. Typically, most MPC powders…
These two terms are usually used in conjunction with discussions of protein solubility. NSI stands for Nitrogen Solubility Index and is expressed as a percentage of the protein nitrogen that is water soluble relative to the total protein nitrogen present. For example, if 75% of the total nitrogen contained in a protein is found by…
Solubility of dairy proteins is measured by determining the quantity of protein nitrogen that is water soluble versus the quantity of protein nitrogen that is water insoluble. Proteins are long chains of amino acids. Nitrogen is part of the backbone of every amino acid. Therefore, to measure protein solubility, one needs only to measure the…
Milk Protein Concentrate (MPC) and Milk Protein Isolate (MPI) is usually sold as a fine, white powder. In water, MPC/MPI forms a white, opaque dispersion of low viscosity – looking very similar to milk. MPC/MPI will remain suspended for prolonged periods of time in water. A well manufactured MPC/MPI will have no odor and a…
Usually, when one talks about protein function, it is in reference to the metabolic fate of the protein once in the bloodstream and/or the protein’s functional properties as a food ingredient/stabilizer. So, when we say that the protein remains highly functional, we are referring to the protein’s ability to affect metabolic pathways in the body…