Browsing by Author "Karagöz, S."

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The Effects of Different Warm Stratification Periods on the Seed Germination of Some Rosa Taxa
(Academic Journals, 2009) Alp, Ş.; Çelik, F.; Türkoǧlu, N.; Karagöz, S.
In this study, the effects of different warm stratification periods on the seed germination of some Rosa species such as Rosa heckellana ssp. vanheurckiana, Rosa canina, Rosa pulverelanta and Rosa dumalis naturally grown in the Van region were investigated. In 2007, seeds of these species were kept at 25° C warm stratification for 10, 11 and 12 weeks, and then transferred to 5° C for cold stratification till the initiation of germination. Germination response to treatments of R. heckellana ssp. vanheurckiana seeds was different compared to the other species. The seeds of R. heckellana ssp. vanheurckiana germinated in a short time (when they kept in warm stratification followed by cold stratification between 1 - 3 weeks). The seeds of the other species required 5 months of cold stratification after warm stratification to overcome seed dormancy. The overall germination percentage were 18.80% in R. canina, 13.80% in R. pulverelanta and 13.53% in R. dumalis at 25° C of warm stratification followed by 5° C cold stratification. We determined that for these three taxa, the most appropriate method of stratification was 11 week warm stratification followed by cold stratification. © 2009 Academic Journals.
Evaluation of Median Lethal Dose and Analgesic Activity of Foeniculum Vulgare Miller Essential Oil
(2006) Özbek, H.; Taş, A.; Özgökçe, F.; Selçuk, N.; Alp, Ş.; Karagöz, S.
Gas-chromatographic analysis, analgesic effect and median lethal dose (LD50) of Foeniculum vulgare Essential Oil (FEO) extract were investigated in mice. In all the experiments mice were tested twice, 30 min before drug administration in the baseline latency determinated and 30, 90 and 150 min after drug administration by tail-flick device. Aspirin (150 mg kg-1, peroral) and Morphine hydroclorure (10 mg kg-1 subcutan) were used as reference drugs. Only isotonic saline solution (0.2 mL, intraperitoneal) was given to the control group. 0.25 and 0.50 mL kg-1 FEO extract were given intra peritoneally to FEO groups. LD50 of the FEO was determined as 1.038 mL kg-1. At the 150th min of the study it is determined that all of the study groups (except Morphine group) had significantly analgesic effect when compared with control group and there was no difference between Aspirin and FEO groups. It was concluded that FEO had statistically significant and same analgesic effect with Aspirin showed at the 150th min of the study. © 2006 Asian Network for Scientific Information.
Trace Heavy Metal Contents and Mineral of Rosa Canina L. Fruits From Van Region of Eastern Anatolia, Turkey
(2010) Levent, A.; Alp, S.; Ekin, S.; Karagöz, S.
Trace heavy metal and mineral levels in four different sites of Rosa canina L. fruits from the Van region of Eastern Anatolia, Turkey were determined by atomic absorption spectrometry. The trace heavy metal contents and mineral of Rosa canina L. fruit samples were found in the ranges: 6.01-9.29 ppm) for copper, 0.0063-0.0248 ppm for cadmium, 0.111- 0.273 ppm for lead, 0.0328- 0.0830 ppm for cobalt, 35.29-66.7 ppm for manganese, 21.94-30.87 ppm for iron, 7.98-13.32 ppm for zinc, 294.08- 392.33 ppm for magnesium, 1395.88-1792.70 ppm for calcium, 1323.12- 1358.27 ppm for sodium and 2106.48-2445.17 ppm for potassium. Results obtained are in agreement with data reported in the literature.