DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 1-2/2023 str. 72 <-- 72 --> PDF |
The İskilip population has the lowest fat content (54.9%), whereas the Seben population has the highest fat content (73.1%) among the seven populations of Turkish hazelnut. Oleic and linoleic acids were the predominant fatty acids, together representing 90.87% of the total. The amount of palmitic and stearic acids was low while palmitoleic, eicosenoic, α- linolenic, arachidic, and heptadecanoic acids were present in trace amounts (Table 6). Erdogan and Aygün (2005) for Turkish hazelnuts reported that the fat content was 64.4-71.9%, and that the oleic and linoleic acids constituted 91.7% of the total amount. Ayan et al. (2018a), determined that the fat content of the Turkish hazelnut populations ranged from 59.8% to 64.1%. Ninić-Todorović et al. (2019) in their study for Turkish hazelnuts stated that the fat content was 36.50-60.8%, oleic acid 79.3-83.0% and linoleic acids 7.5-10.8%. Similar fat content (48.6–69.9%) and fatty acid composition for Turkish hazel kernels was reported for the samples from Serbia (Ninić-Todorović 1990; Miletić et al. 2007). The average values for oleic acid (C18:1c), linoleic acid (C18:2c), palmitic acid (C16:0) and stearic acid (C18:0), i.e., principal fatty acids, were as follows: 79.53%, 11.34%, 5.68% and 2.03%, respectively. Among the total fatty acids of hazelnuts, total monounsaturated fatty acids (avg. 80.13%) exhibited the highest ratio, while saturated fatty acids presented the lowest content (avg. 7.92%). The oleic acid in Turkish hazel populations vary from 78.6% (Tosya) to 80.1% (İskilip), linoleic acid from 9.45% (Mihalıcçık) to 12.6% (Tosya), palmitic acid from 5.07% (Seben) to 6.95% (Mihalıcçık) and stearic acid from 1.56% (Tosya) to 2.54% (Mihalıcçık) (Table 6). Król and Gantner (2020) investigated some cultivars of C. avellana, which are most widespread and prominent in certain countries (Croatia, Iran, Italy, Oregon, Poland, Portugal, Spain, and Turkey), in a review. Considering the chemical |