Power moisture loss

Powers, D.H. and Fox, C. (1957). A study of the effect of cosmetic ingredients, creams and lotions on the rate of moisture loss. Proc. Sci. Sect. Toilet Goods from the Skin Ass. 28 21. Racy, I. (1989). Drug Formulation. Wiley, New York. 

Adedeji et al. (2009) precooked chicken nuggets in microwave at different power levels and reported a tremendous reduction in oil uptake and a significant change in moisture loss in the fried products when a lower level of microwave power density... 

FIGURE 2.8 Effect of microwave precooking at different power densities on moisture loss in breading coating of chicken nuggets fried at 190°C. (From Adedeji, A.A. et al., J. Food Eng., 91, 146, 2009). 

The favorable influence of moisture is apparently due to two effects (311). Moisture reduces the sparking tendency between a point and a plate, or in any similar electrode system, and also decreases the resistivity of the precipitated catalyst. The lower resistivity eliminates back discharge, a condition that results in abnormal power consumption and loss of efficiency. 

The power-loss meter is the most common type of dielectric moisture meter. It senses the product of the dielectric constant and loss factor. Generally, the loss factor increases with wood moisture content but may exhibit variations from this behavior depending on the frequency of measurement (JO, 11, 14). An increase in temperature produces effects similar to increasing moisture content, with interaction between these two parameters. Therefore, temperature adjustments of meter readings are complex, sometimes increasing and sometimes decreasing the scale reading as temperature increases... 

Electrical moisture meters provide a quick and reasonably accurate nondestructive alternative. The direct-current resistance of the timber is measured or either the alternating-current capacitance or power loss can be measured. Direct-current resistance moisture meters are more common a pair of needles, a fixed distance apart, is driven into the wood across or along the grain (depending on the manufacturer s instructions) and the electrical resistance measured. The procedure is reasonably accurate between the fibre saturation point (defined later) at 30% and about 6% moisture content (at which point the resistance becomes too great to measure with reasonable accuracy). In this moisture content range, the relationship between electrical resistance and moisture content is represented by a log-log plot. 

---