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    Essential oil characterization of Cousinia sivasica Hub.-Mor. (Asteraceae)
    (2018) Tekin, Mehmet; Özek, Gülmira; Martin, Esra; Özek, Temel; Yılmaz, Gülden; Başer, Kemal Hüsnü Can
    In this study, essential oil properties of an endemic plant of Turkey, Coucinia sivasica Hub.-Mor. were studiedfor the first time. Essential oil of C. sivasica was obtained by using Clevenger apparatus with hydrodistillationtechnique. The essential oil was analyzed by GC-FID and GC/MS techniques on a polar column and total 44compounds were identified representing 98.3. Fatty acids, their esters, methyl-branched carboxylic acids and aromaticacid esters predominated (66.3) in the oil with hexadecanoic acid (42.8), 1-isobutyl 4-isopropyl 3-isopropyl-2,2-dimethyl succinate (12.2) and methyl salicylate (7.1) as major constituents.
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    The haemodynamic effects of umbilical cord milking in term infants: a randomised controlled trial
    (Wolters Kluwer Medknow Publications, 2023) Tekin, Mehmet; Gokdemir, Mahmut; Toprak, Erzat; Silahli, Musa; Energin, Hasan; Gokmen, Zeynel
    Introduction: Umbilical cord milking (UCM) is a method that allows for postnatal placental transfusion. The benefits of UCM have been demonstrated in some studies, but knowledge about its haemodynamic effects in term infants is limited. The aim of this study was to evaluate the haemodynamic effects of UCM in term infants. Methods: In this prospective, randomised controlled study, 149 healthy term infants with a birth week of >= 37 weeks were randomly assigned to either the UCM or immediate cord clamping (ICC) group. Blinded echocardiographic evaluations were performed in all the neonates in the first 2-6 h. Results: Superior vena cava (SVC) flow measurements were higher in the UCM group compared to the ICC group (132.47 +/- 37.0 vs. 126.62 +/- 34.3 mL/kg/min), but this difference was not statistically significant. Left atrial diameter (12.23 +/- 1.99 vs. 11.43 +/- 1.78 mm) and left atrium-to-aorta diastolic diameter ratio (1.62 +/- 0.24 vs. 1.51 +/- 0.22) were significantly higher in the UCM group. There were no significant differences in other echocardiographic parameters between the two groups. Conclusion: We found no significant difference in the SVC flow measurements in term infants who underwent UCM versus those who underwent ICC. This lack of significant difference in SVC flow may be explained by the mature cerebral autoregulation mechanism in term neonates.
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    Karyology of endemic Matthiola anchoniifolia Hub. -Mor. (Brassicaceae) in Turkey
    (Firenze Univ Press, 2013) Martin, Esra; Yilmaz, Gulden; Tekin, Mehmet
    In this paper, the karyological properties of an endemic plant for Turkey, Matthiola anchoniifolia Hub.-Mor. grown in the Sivas Province in Turkey, are studied. Karyotype was made on somatic metaphases using an Image Analysis System. The somatic chromosome number is determined as 2n = 12. The karyotype formula of this species consists of five median chromosome pairs and one submedian chromosome pair. The shortest chromosome length is 4.89 mu m, the longest is 9.18 mu m, and haploid chromosome length is 38.66 mu m. Photographs were taken using a BX51 Olympus microscope. An ideogram of the species was drawn using an Image Analysis System.
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    Morphology, anatomy and karyology of endangered Turkish endemic Physoptychis haussknechtii Bornm. (Brassicaceae) from Central Anatolia
    (Univ Zagreb, Fac Science, Div Biology, 2017) Tekin, Mehmet; Martin, Esra
    In this study, the morphology, anatomy, pollen morphology, leaf and seed micromorphology and karyology of the Turkish endangered endemic Physoptychis haussknechtii were investigated in detail for the first time. The species was studied in terms of detailed morphology. Basal leaves are narrowly spatulate and cauline leaves are linear to oblanceolate; both leaves are covered with flattened stalked five-armed trichomes. Raceme length was found to be up to 6 cm and 9 cm in the flowering and fruiting stages, respectively. Sepals are linear-oblong, rarely elliptic with obtuse to subacute apex. Petals are spatulate with emarginate apex. Some morphological characteristics such as dimensions of cauline leaves and ovary and length of pistil were measured for the first time. In an anatomical study, root, stem, basal leaf and cauline leaf were examined. The anatomical results showed that the plants have secondary growth in roots, primary growth in stems, amphistomatic and equifacial basal and cauline leaves with anisocytic stomata. Pollen grains are radial symmetrical, isopolar and tricolpate. The ratio of polar axis to equatorial diameter is 1.16, and pollen shape is subprolate. Exine sculpturing is reticulate under light microscope and scanning electron microscope. Seeds are obovate-suborbicular, compressed and pale brown. The chromosome number of P. haussknechtii was defined to be 2n=16. The karyotype formula of P. haussknechtii consists of five metacentric chromosome pairs and three submetacentric chromosome pairs.
  • Küçük Resim Yok
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    Morphology, anatomy and karyology of endangered Turkish endemic Physoptychis haussknechtii Bornm. (Brassicaceae) from Central Anatolia
    (Univ Zagreb, Fac Science, Div Biology, 2017) Tekin, Mehmet; Martin, Esra
    In this study, the morphology, anatomy, pollen morphology, leaf and seed micromorphology and karyology of the Turkish endangered endemic Physoptychis haussknechtii were investigated in detail for the first time. The species was studied in terms of detailed morphology. Basal leaves are narrowly spatulate and cauline leaves are linear to oblanceolate; both leaves are covered with flattened stalked five-armed trichomes. Raceme length was found to be up to 6 cm and 9 cm in the flowering and fruiting stages, respectively. Sepals are linear-oblong, rarely elliptic with obtuse to subacute apex. Petals are spatulate with emarginate apex. Some morphological characteristics such as dimensions of cauline leaves and ovary and length of pistil were measured for the first time. In an anatomical study, root, stem, basal leaf and cauline leaf were examined. The anatomical results showed that the plants have secondary growth in roots, primary growth in stems, amphistomatic and equifacial basal and cauline leaves with anisocytic stomata. Pollen grains are radial symmetrical, isopolar and tricolpate. The ratio of polar axis to equatorial diameter is 1.16, and pollen shape is subprolate. Exine sculpturing is reticulate under light microscope and scanning electron microscope. Seeds are obovate-suborbicular, compressed and pale brown. The chromosome number of P. haussknechtii was defined to be 2n=16. The karyotype formula of P. haussknechtii consists of five metacentric chromosome pairs and three submetacentric chromosome pairs.