Browsing by Author "Tanrisever, Savas"

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Citation - Scopus: 1
Phenolic Compounds and Peroxide Parameters of Olive Oils Obtained from Local Varieties
(Springer Science and Business Media Deutschland GmbH, 2024) Tanrisever, Savas; Sakar, Ebru; Ercıslı, Sezai
Olive oil is known not only for its bitter and fruity taste, but also for its health potential, which is assumed to be due to its phenolic composition. The study was conducted to evaluate the effect of seasonal variation and variety on the total phenolic content, peroxide values and phenolic composition of olive oil. During the two consecutive production seasons of 2019 and the 2020, total phenolic content, peroxide value and phenolic compositions, which are among the quality parameters of the olive oils obtained from the fruits of eight local olive varieties grown in the Derik district of Mardin province located in southeastern Anatolia, Turkey, were analyzed. The highest total phenol content in the oils was recorded as 564 mg GAE/kg in the ‘Belloti’ variety in the 2020 production season, while the lowest total phenol content was detected as 122 mg GAE/kg in ‘Derik Halhalı’ variety harvested in the 2019 production season. Results showed that seasonal climate fluctuations did not have a significant effect on the peroxide value, but they change according to varieties. It has been shown that olive oils of all local varieties grown in Derik district have a significant potential in terms of phenolic composition. It has been observed that this potential is especially higher in some varieties including ‘Mavi’, ‘Belloti’, ‘Hursuki’ and ‘Zoncık’. According to the data obtained, the polyphenol content of olive oils from varieties harvested in the cool and rainy production season is lower than those harvested in the dry and hot season. Therefore, seasonal change and olive variety affect the polyphenol composition of olive oils extracted from olive varieties grown in a region. © 2024 Elsevier B.V., All rights reserved.
Study on the Flow Field Characteristics of the Air-Suction Jujube Harvester Pipeline Based on Magnetohydrodynamic Airflow Control
(TÜBİTAK Scientific & Technological Research Council Turkey, 2025) Nie, Jing; Zhang, Qi; Jiang, JiaShun; Li, JingBin; Ding, LongPeng; Li, ShuFeng; Tanrisever, Savas
This study aimed to address the issue of suction force attenuation in the air-suction jujube (red date) harvester due to pipeline pressure loss. The active flow control method based on magnetohydrodynamics was used to optimize the pipeline flow field and reduce pressure loss. Through multiphysics field coupling theory modeling and numerical simulation, the regulatory effects of different electromagnetic field parameters on the pipeline flow field were characterized. An experimental platform was established to verify that the optimized electrode tip density, electrode voltage, and magnetic induction intensity could significantly increase the outflow gas velocity, pressure difference, and harvesting efficiency of the pipeline. The results showed that when the voltage increased from 50 to 80 kV, the pipeline outlet velocity increased from 27.90 to 30.65 m/s, showing a significant marginal decreasing characteristic. For every 0.1 T increase in magnetic induction intensity, the terminal velocity increased by an average of 1.45 m/s, and the secondary coupling effect of Lorentz force gradually became more significant with the increase of the magnetic field intensity. When the air flow velocity increased from 15 to 30 m/s, the nonlinear characteristic of the velocity gain was prominent. When the tip density was 5.208 units/cm2, the electric field voltage was 80 kV, the magnetic induction intensity was 0.203 T, the average pipeline outlet velocity reached 9.917 m/s (an increase of 7.9% compared to the benchmark), the average inlet and outlet pressure difference increased to 253 Pa (an increase of 7.7%), the average red date harvesting efficiency reached 3.037 kg/min (an increase of 7.3%), and the fruit damage rate was controlled at around 0.5%. This research provides theoretical support for optimizing air-suction jujube harvesting equipment, and shows the potential application of magnetic fluid airflow control technology in agricultural machinery.
Leaf Plant Nutrient Content and Sapling Growth of ‘Transvalia’ Peach Variety Grafted on Prunus Rootstocks
(Springer Science and Business Media Deutschland GmbH, 2024) Uğur, Remzi; Ali Gundesli, Muhammet; Ercıslı, Sezai; Ilhan, Gulce; Seyfettin Atli, Halit; Sülüşoğlu Durul, Melekber; Tanrisever, Savas
In peach cultivation, there is an increasing interest in breeding rootstock suitable for intensive planting and for use in calcareous and poor soils. This study was carried out to test the performance of some promising Prunus rootstocks for ‘Transvalia’ peach variety. A total of 16 rootstocks obtained by interspecies hybridization from different origins were used for ‘Transvalia’ peach variety. Rootstock diameter, scion diameter, sapling height, rootstock scion ratio, leaf chlorophyll contents and leaf plant nutrient contents were analyzed. Results showed that the level of the majority of macro- and micro-elements was found to be sufficient. Leaf chlorophyll contents of ‘Transvalia’ peach cultivar grafted on stronger rootstocks such as GN-22, FG-58 and NGF-14 were found to be the highest. It has been determined that FG-16 rootstock is 40% more dwarf in terms of seedling growth strength compared to GN-22 rootstock in the Mediterranean climate zone. There were significant differences between rootstocks in terms of scion leaf chylorphyll content (SPAD values). The highest leaf chlorophyll contents were found in ‘Transvalia’ peach variety grafted on GN-22 (48.22), FG-58 (47.75) and NGF-14 (47.14), which are strong rootstocks. No correlation was found between growth strength and leaf plant nutrients. However, it has been determined that strong growing rootstocks can give positive results in lower quality soils. © 2024 Elsevier B.V., All rights reserved.