Oleuropein expression in olive oils produced from drupes stoned in a spring pitting apparatus (SPIA)

A new device for the preparation of stoned olive oils, called SPIA, has been developed, aiming at fulfilling the targets of. (i) employing a less powered engine, (ii) reducing the size of the machine and (iii) reaching a good efficiency in terms of oil yields. Oleuropein expression was used as a biochemical parameter to distinguish stoned oils from oils produced by conventional milling systems. In vitro experiments performed by exposing oteuropein to pit enzymes, showed an exponential decay of the substrate. (c) 2007 Elsevier Ltd. All rights reserved.