Farklı Kurutma Yöntemlerinin Kekik (Thymus sipyleus Boiss. var. sipyleus) Uçucu Bileşenleri Üzerine Etkisi

Yıl 2018, Cilt: 20 Sayı: 2, 210 - 215, 16.08.2018

Ayben Kılıç Pekgözlü , Kerem Özcan

Öz

Kurutma işlemi aromatik bitkiler için önemli bir uygulama olup, bitki
materyali ve kurutma yöntemine göre farklılıklar göstermektedir. Bu çalışmada
limoni kekik olarak bilinen Thymus
sipyleus Boiss.var.sipyleus yaprakları
4 farklı kurutma yöntemi ( Açık havada, mikrodalga, donduruculu kurutucu, 50-70
^oC’de fırında) ile kurutulmuştur. Uçucu bileşenler eşzamanlı
destilasyon-ekstraksiyon (SDE) yöntemiyle ekstrakte edilmiştir. Citronellol,
1,8-cineol, camphor camphene ve myrcene bütün örneklerde en önemli bileşikler olarak
bulunmuştur. Taze yaprakta % 17,9 olan citronellol miktarı kurutma işlemi ile %
22,7’ye yükselmiştir. Thymol oranı ise farklı kurutma yöntemlerinde % 0,35-3,80
arasında değişmektedir. Kurutma işlemi monoterpen hidrokarbon oranını
düşürmüştür (%3-5). Fakat, bu grubun alkol formu ise artmıştır (%1-6). Açık
havada kurutma veya 50^oC’de fırında kurutma bu tür için en uygun yöntemdir.

Anahtar Kelimeler

Donduruculu kurutucu, Mikrodalga, Fırında kurutma, Açık havada kurutma, Kekik.

Effect of Drying Methods on the Composition Volatile of Compounds of Thyme (Thymus sipyleus Boiss. var. sipyleus)

Öz

Drying is an important application for aromatic
plants and showed variations regard to plant material and drying methods. In
this study, aerial parts of Thymus
sipyleus Boiss.var.sipyleus were
dried with four different drying methods (Air-dried, Microwave, Freeze-drying,
oven drying at 50-70 ^oC.) and extracted with Simultaneous
Distillation-Extraction (SDE) to determine the volatile compounds. Citronellol,
1,8-cineol, camphor camphene and myrcene were found to be the dominant
compounds in all samples. The amount of citronellol increased with drying to
22,7% where this amount was 17,9% in the fresh samples. Thymol was ranging
between 0,35-3,80% with different drying methods. Drying procedure decreases
(3-5%) the amount of monoterpene hydrocarbons. However, alcohol forms of these
compounds were increased (1-6%). Air-drying and 50 ^oC oven-drying
can be suitable methods for drying of this species.

Anahtar Kelimeler

Freeze drying, Microwave drying, Oven-dry, Air-drying, Thyme

Kaynakça

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