Figueredo, G.Chalchat, J. C.Özcan, M. M.2020-03-262020-03-262011Figueredo, G., Chalchat, J. C., Özcan, M. M., (2011). Effect of Harvest Years on Chemical Composition of Essential Oils of Bitter Fennel (Foeniculum Vulgare Mill. Subsp. Piperitum) Fruits. Journal of Food Biochemistry, 35, 1223-1230. DOI: 10.1111/j.1745-4514.2010.00446.x0970-7077https://hdl.handle.net/20.500.12395/28758Essential oil contents on a dry weight basis of ripe fruits of bitter fennel collected in different years were 5.1%, 4.8%, 4.6%, 7.0%, 6.5%, 4.7%, 3.8% and 4.0%, respectively. By GC and GC-MS analysis, the main identified components representing 99.59%, 94.74%, 99.62%, 99.35%, 99.63%, 99.58%, 98.07% and 99.68% of the oils were limonene (3.87–17.63%), fenchone (13.82% to 29.17%) and estragole (25.14% to 65.45%). But, transanethole contents of fruit harvested in 2006 was found very high (44.60%) when compared with oil components of other years. At the same time, a-phellandrene contents of samples harvested in 2005 and 2008 years were found higher than the results of other years. As a result, the chemical composition of oils showed differences according to harvest years.eninfo:eu-repo/semantics/closedAccessArticle3512301223Q4