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Journal of Animal Science, Vol 75, Issue 12 3169-3173, Copyright © 1997 by American Society of Animal Science

JOURNAL ARTICLE

Influence of sample orientation on prediction of fresh ham lean content by electromagnetic scanning

N. L. Meseck, B. L. Gwartney, C. R. Calkins and P. S. Miller
Animal Science Department, University of Nebraska, Lincoln 68583-0908, USA.

To evaluate the effect of orientation of hams during electromagnetic scanning on the estimation of dissected lean content, hams were scanned horizontally, posterior first (POS) or dorsal first (DOR), and vertically, medial side (aitchbone) first (MED; standing on the butt face). Weight and percentage of dissected lean were estimated using scan peak for each orientation, ham weight, and fat thickness. The mean scan peak for the MED orientation was approximately twice as great as peaks for the POS and DOR orientations, which suggests that this orientation may offer greater predictive accuracy by reducing the signal to noise ratio. Results, however, indicated that all orientations were equally effective at predicting lean weight and percentage, with R2 values of .95 and .75 and root mean square errors of .21 kg and 2.6%, respectively.




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Copyright © 1997 by the American Society of Animal Science.