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Tıbbi ve aromatik bitki uçucu yağı bileşenlerinin çoğunun diğer canlı organizmalar üzerinde allelopatik etkileri vardır. Bu bileşenlerin tarımsal üretim üzerinde olumlu ve olumsuz etkileri olabilir. Sürdürülebilir tarım için yeni tarım teknikleri ve uygulamalarının araştırılması çok önemlidir. Son yıllarda sağlık sorunlarının artmasının ana nedenlerinden biri olduğu gösterilen güvenli gıda eksikliği, bu tür doğal bileşiklerin kullanılması ile bir ölçüde azaltılabilir. Bu çalışma bazı bitkiler üzerine allelopatik etkileri olduğu bilinen lavandin (Lavandula x intermedia) bitkisi uçucu yağının mısır tohumlarının çimlenmesi ve fide gelişim özelliklerine (çimlenme oranında azalma, fide yaş ve kuru ağırlığı, fide nispi nemi, kök ve fide uzunluğu) etkilerini araştırmak amacıyla laboratuvar koşullarında Petri kaplarında iki deneme şeklinde yürütülmüştür. Yapılan varyans analizleri sonucunda, lavandin uçucu yağının incelenen tüm özellikler üzerine önemli etkiye (p

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This study investigated the production of poly(lactic acid) (PLA) nanofibers containing cypress (CUP) essential oil (EO) via electrospinning. The nanofibers were produced from polymer solution prepared with different percentages of cypress EO. Cypress EO-containing PLA nanofibers were characterized and some mechanical and thermal properties were examined using thermogravimetric analysis, scanning electron microscopy, Fourier-transform infrared spectroscopy, and dynamic mechanical analysis. The thermal stability of the nanofibers was reduced depending on the percentage of the cypress EO. As the ratio of the cypress EO to polymer matrices was increased, it was observed that the glassy transition temperatures of the nanofibers decreased and their flexibility increased. The T g value was determined to be 53.74°C for the neat PLA nanofiber, while 51.83°C for the PLA-CUP nanofiber (containing 15% cypress EO). According to the results of releasing trial, the increased amount of cypress EO resulted in less cypress EO releasing from polymer matrices. The nanofibers were observed to exhibit antibacterial activity against Escherichia coli and Staphylococcus aureus. The inhibition zone diameter of the nanofibers containing 10% cypress EO was 20 mm for S. aureus and 16 mm for E. coli, while 10 mm in the presence of Kanamycin.

Monitoring biological growth of field crops is important for planning and timing agricultural practices. In order to assess biological growth pattern of dry matter accumulation in triticale Egeyildizi triticale variety were grown in Çanakkale conditions in 2012-2013 and 2013-2014 growing seasons with continuous plant samplings from seedling emergence until seed maturation. Gompertz, Logistic, Logistic Power and Richards growth models are fitted to actual growth data and their predictions were compared. Results suggested that all sigmoidal growth models successfully explained triticale dry matter accumulation over 98 % R 2 values and low mean square errors, Richards model fitted best for both years with an R 2 value over 99 %. Dry matter accumulation were also investigated as a result of average temperature, precipitation, growth degree days and cumulative growth degree days with stepwise regression. Rresults indicated that average weather temperature had a similar pattern across both growing seasons and had a major influence on dry matter accumulation. Since Richards sigmoidal growth model may be adequately described growth pattern of triticale by generally high R 2 with lower Mean Square Error (MSE) values.