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Title: | The Quality of Locally-Manufactured Cornmill Grinding Plates |
Authors: | Kwofie, S. Andrews, A. Mensah, E. |
Keywords: | maize cast-iron wear contamination iron-overload |
Issue Date: | 2011 |
Publisher: | Journal of Science and Technology, |
Citation: | Journal of Science and Technology, Vol. 31, No. 1 (2011), pp 152 |
Abstract: | Maize was milled either ‘wet’ or ‘‘dry’’ using locally-manufactured milling plates. Samples of
milled maize were taken and analyzed for elemental iron (Fe). Results show that iron particles
from milling plates contaminates the milled maize and that the level of contamination increases
with the quantity of milled maize. This is the case in both ‘wet’ and ‘dry’ milling. However, the
relationship between the mass of elemental iron (Fe) in milled maize and mass of milled maize in
‘wet’ milling differed from that of ‘dry’ milling. That is, in ‘dry’ milling the rate of metal loss decreases
at first and then increases with mass of milled maize, whereas in ‘wet’ milling, the rate
increases monotonically with mass of milled maize. The difference could be explained in terms of
the mechanism(s) or mode(s) of metal loss under the different milling conditions. In ‘dry’ milling,
loss of metal is initially controlled by friction wear and later by erosion-corrosion. In the case of
‘wet’ milling metal loss could be attributed to conjoint action of corrosion and friction wear. The
implications of these results are briefly discussed in terms of the possible health effects on consumers
of foods prepared from such contaminated milled maize. |
Description: | Article published in the Journal of Science and Technology, Vol. 31, No. 1 (2011), pp 152 |
URI: | http://hdl.handle.net/123456789/4860 |
Appears in Collections: | Journal of Science and Technology 2000-
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