MDGC-MS Pinot noir Quercus pyrenaica aging alternative woods barrels brettanomyces chips different oaks dissolved oxygen ellagitannins floating and fixed micro-oxygenation gold nanoparticles grapes high power ultrasound low molecular phenols must oak oak barrels oak fragments oak wood barrel other woods phenolic compounds red wine regeneration sanitation sensorial characteristics sensory analysis traditional oaks trans-2-decenal