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Mint is a common name given to the Genus Mentha species, belonging Lamiaceae family, cultivated for their essential oil and spice using. Yield characteristics of total five spearmint varieties, which four of them are commercial foreign cultivar another one is selected clones from Turkish landraces for cultivar, were studied in Isparta ecological conditions during 2016 and 2017 years with three replication of randomized block design. Total yields (fresh and dried herb, dried leaves and essential oil) of the varieties were determined in vegetation periods of each year. According to twoyear studies, mean data of fresh herb, dried herb, and dried leaves were 18.2-21.5 t/ha, 5.1-6.2t/h and 2.9-3.9 t/ha, respectively. The yields of essential oil were between 54.0 and 84.8 L/ha. As a result of the study, although the differences in dry leaf yields of clones and varieties were insignificant, statistically, the highest leaf yield was obtained from Crispa cultivar. But Applemint, Maracco varieties gave higher oil yields than other varieties. Therefore, it has been determined that Applemint, Maracco varieties can be recommended for essential oil production in the region. [ABSTRACT FROM AUTHOR]

This study is about to microencapsulation of mint essential oil prepared using casein added at different ratios to zein and determination of efficiency effect and release properties of obtained microcapsules. The encapsulation efficiency and release levels of microcapsules prepared using zein and casein-zein complex are compared. Due to the hydrophilic / hydrophobic properties of the amino acids in the structure of zein and casein, the encapsulation efficiency of microencapsulation of mint volatile oil in the apolar structure has increased. For the microencapsulation of mint volatile oil, casein was added at ratios of 1%, 3%, 5%, 7%, 9%, 11%, 13% ,15% to zein. The highest encapsulation efficiency value was 54.66 ± 3.76% with 13% casein-zein formulation. The encapsulation efficiency value of microcapsules obtained by using only zein was 46.84 ± 0.22%. In addition, in the release rate test, release of mint volatile oil from microcapsules was determined as 64.27 ± 3.48% at the end of the ninth day in microcapsules obtained by using only zein. The release rate of the microcapsules zein-casein was determined as 37.86 ± 2.73%. [ABSTRACT FROM AUTHOR]