Browsing by Author "Öztürk, A."

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Determination of Lethal Doses of Volatile and Fixed Oils of Several Plants
(2004) Özbek, H.; Öztürk, M.; Öztürk, A.; Ceylati, E.; Yener, Z.
Objective: To determine lethal doses of fixed and/or volatile oils extracted from leafs or fruits of Pimpinella anisum, Foeniculum vulgare, Sesamum indicum, Eugenia caryophyllata, Nigella sativa, Urtica pilulifera, Apium graveolens, Cuminum cyminum, Coriandrum sativum and Thymus fallax, Method: Swiss albino mice were injected intraperitoneally with different concentrations of the extract and results were evaluated with the method of probit analysis. Results: Maximum volume of oil administered to mice was kept below 0.5 ml. The oils of Sesamum indicum and Urticapilulifera was completely non-lethal even at doses reaching 12.8 ml/kg and considered non-toxic. Conclusion: Lethal doses were determined for all other plants and LD1, LD10, LD50, LD90 and LD99 values were given.
Effects of Quince Rootstocks and Pear Cultivars on Fruit and Yield Characteristics
(Centenary University, 2023) Kurt, T.; Öztürk, A.; Faizi, Z.A.; Polat, Y.
The research carried out to evaluate the effects of quince rootstocks [Quince Province BA29 (BA29), Quince A (QA), Quince C (MC)], pear cultivars, and research years on fruit quality and yield efficiency in the years 2020-2021. The highest fruit weight was obtained from BA29 (196.02 g), and the lowest was from MC (158.09 g). In the cultivars, the highest fruit weight was obtained from ‘Abate Fetel’ (210.85 g), the lowest from Santa Maria (156.73 g). The highest number of fruits (17.06 pieces tree-1), yield per tree (3.13 kg tree-1), yield per hectare (5982.8 kg ha-1), and yield per trunk cross sectional area (0.30 kg cm-1) obtained from BA29 followed by QA. In the cultivars, the highest number of fruits (19.60 pieces tree-1), yield per tree (2.98 kg tree-1), and yield per hectare (5685.00 kg ha-1) were obtained from ‘Santa Maria’. In the research years, the pre-harvest fruit drop rate (PHFDR 11.04%) and black spotted fruit rate (BSFR 13.79%) were observed to be higher in 2021, while the marketable fruit rate (MFR 77.03%) was observed to be higher in 2020. In the rootstocks, the highest PHFDR (11.24%) was observed on BA29 rootstocks, while the highest MFR (73.72%) was recorded on QA. In terms of cultivars, the highest PHFDR (10.73%) was observed in ‘Williams’, while the highest BSFR (16.41%) was in ‘Deveci’, and the highest MFR (76.31%) in ‘Santa Maria’. As a conclusion, the highest yield and marketable fruit rate were obtained from the ‘Santa Maria’ cultivar and yield from BA29 rootstock. It could be suggested that semi-dwarf cultivars and rootstocks for suitably perform under high density pear orchards. © 2023, Centenary University. All rights reserved.
Hepatoprotective Effect of Foeniculum Vulgare Essential Oil: a Carbon-Tetrachloride Induced Liver Fibrosis Model in Rats
(2004) Öbek, H.; Uǧraş, S.; Bayram, I.; Uygan, I.; Erdoǧan, E.; Öztürk, A.; Huyut, Z.
Hepatoprotective activity of Foeniculum vulgare (fennel) essential oil was studied using a carbon tetrachloride-induced liver fibrosis model in rats. The hepatotoxicity produced by chronic carbon tetrachloride administration was found to be inhibited by Foeniculum vulgare essential oil with evidence of decreased levels of serum aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase and bilirubin. Histopathological findings also suggest that Foeniculum vulgare essential oil prevents the development of chronic liver damage. The changes in body weights in the rats assigned to the study groups supported these biochemical and histopathological findings. The results of this study clearly indicate that Foeniculum vulgare essential oil has a potent hepatoprotective action against carbon tetrachloride-induced liver fibrosis in rats.