Sweet whey powder is mainly used as an ingredient in foods and has a
potential for increased use with the development of new foods. In view of the many
whey powder producers, there is need to establish the quality of the whey powders
currently on the market in terms of conformance to specifications, consistency over
different seasons, and keeping quality. Selected sweet whey powder from different
processors was analysed for microbiological, physicochemical and sensory quality.
The whey powder was in most the cases within specifications. There was suggestive
evidence of seasonal variability in the cooked flavor and sweet taste. In regard to
storage, there was no significant difference in the flavor and aroma of the whey
powder with storage except for the oxidized flavor which was marginally significantly
different in at least one product. Most of the variation was in the microbiological and
physicochemical properties.
Of three products considered, rate of deterioration by the Maillard reaction,
one was significantly different from the other two, having lower activation energy. Accelerated shelf-life testing deterioration rates compared well with those at ambient
conditions for two products, implying that ASLT can be used for shelf-life
determinations only if Maillard reaction inhibitors are absent.
The flavor and aroma of sweet Cheddar cheese whey powder from one
processor over 12 months, was consistent. However, the physicochemical, and
microbiological properties were variable mainly between the fall and summer
production with the fall production being higher in L* (lightness) and pH, but low in
solubility index, and conversely, the summer production being high in solubility index
and titratable acidity but low in L*. / Graduation date: 2005
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/26450 |
| Date | 13 September 2004 |
| Creators | Sithole, Rhoda |
| Contributors | McDaniel, Mina R. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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