ABSTRACTj ts_180 257..274 The cooked rice extrusion testing system consisted of a piston disc and a sample container with a pot base insert of one outlet. S init (N/m) and S max (N/m) are the slopes of the force-deformation curve in the packing and compression stages, respectively, and in the original method they are graphically drawn. Here, however, they were numerically computed as the differential of force to distance. The S init and S max from the numerical and drawing methods were compared in terms of data reproducibility and accuracy as described by coefficient of variation (CV) and correlation coefficient (CC), respectively. The numerically computed S init and S max showed lower CV: the new method, 0.03-0.06 and 0. 03-0.06; the original method, 0.18-0.39 and 0.03-0.14, respectively. S init by the new method showed higher CC with the adhesiveness of the samples: the new method, -0.99; the original method, -0.4. Therefore, the new method proved to be better in data accuracy and reproducibility.
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