TY - JOUR TI - Determination Of Bitterness Index (K225) And Total Fenol Content Of Olive Oils Obtained With Different Regions, Varieties And Processing Systems AB - In this work the effect of differentgrowing areas on olive (Ayvalık, Memecik, Gemlik, Beylik, Edincik Su, Girit,Kilis Yağlık, Sarı Ulak, Tavşan Yüreği, Topak Aşı) oil bitterness index (K225)were studied at the South Marmara, South and North Aegean, West and EastMediterranean  Regions at two, two and ahalf (2.5), and three phase extraction system, during 2014/2015 crop season. Atotal of 41 virgin olive oils samples were collected from these Regions. Totalphenol content and bitternes index (K225) were analyzed in theresearch. A Solid-Phase Extraction procedure were carried out for extraction ofthe bitter compounds. The results of total phenol content and K225 valuesshowed that the Beylik olive oil was determined with the highest total phenolconent and bitterness index (K225) with 330.26 mg CAE kg-1 oil  and 1.21 at 2.5 phaseextraction system from Manavgatat the West Mediterranean Region, respectively. After the Beylik  variety, the highest total phenol content wasdetermined Ayvalık and Edincik Su olive oil with 291.03 and 270.62 mg CAE kg-1 oil, respectively. TheMemecik and Ayvalık olive oil bitterness index (K225) was determined 0.86 and 0.85 at two phase extractionsystem from Muğla and Burhaniye at the Southand North Aegean, respectively.  AU - DURAL, Mehmet Ulaş AU - ÖZDEMİR, Eren Durmuş AU - KÖSEOĞLU, Oya AU - sevim, didar DO - 10.20289/zfdergi.340262 PY - 2018 JO - Ege Üniversitesi Ziraat Fakültesi Dergisi VL - 55 IS - 2 SN - 1018-8851 SP - 171 EP - 178 DB - TRDizin UR - http://search/yayin/detay/302582 ER -