Effects of additives on the rheological and mechanical properties of non-conventional fresh handmade tagliatelle

The effects of the following additives on the amaranth (A), quinoa (Q) and oat (O) dough rheological properties and the extruded tagliatelle dough mechanical characteristics were evaluated: carboxymethylcellulose of sodium (CIVIC), whey protein isolate (WPI), casein (CAS), chitosan (CHIT) and pre-gelatinized starch (PS). The amaranth, quinoa and oat theological dough properties and amaranth, quinoa and oat tagliatelle mechanical characteristics were compared to those of their respective controls (ACTRL, QCTRL and OCTRL) and of the SEMOLINA sample. The storage modulus (G) and loss modulus (G '') values of the quinoa and oat doughs with PS were similar to those of the semolina dough. For all tagliatelle samples, WPI reduced the elastic modulus or Young's modulus towards that of the semolina tagliatelle. Moreover, the additives did not have particular influence on the tenacity with the exception of the amaranth tagliatelle added with WPI. (C) 2008 Elsevier Ltd. All rights reserved.