Textural characteristics of typical italian bread-sticks ‘grissino stirato’ and ‘rubatà’

Stretched ("Grissino striato") and rolled ("Rubatà") bread-sticks are typical Italian bakery products that are also widely produced in other EU countries. Despite their wide distribution there are no studies available on these products. Therefore, the aim of this study was to distinguish them according to their chemical composition and textural characteristics determined by a compression test using a Texture Analyzer. Fifty samples (25 for each kind of bread stick, produced by different bakers, were examined. Variance analysis showed that the two bread-sticks only differed with respect to texture parameters. There were no differences in chemical parameters. The higher value of the maximum force and of the average puncturing force indicate that the rolled "Rubatà" bread-stick has a firmer character than the stretched "Grissino striato" bread-stick. On the contrary, the number of spatial ruptures and the ruggedness index were higher for the stretched "Grissino striato" bread-stick. For product authentication, an Artificial Neural Networks (ANN) with a three-layer, fully interconnected, feed-forward architecture was used. ANN is an effective and powerful tool for distnguish these products with a very high average learning (94% for rolled bread-stick and 93% for stretched bread-stick). The model obtained can be easily used for product authentication.