Browsing by Author "Ozturk A."

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Bent Rule Theoretical Studies Of Nonmetal Fluorides
(2007) Kandemirli F.; Hoscan M; Ozturk A.; Uluadaoglu E.
Changes in micromorphological characters of platanus orientalis L. leaves in Turkey
(2019-01-01) Sevik H.; Cetin M.; Ozturk A.; Yigit N.; Karakus O.
In this study, it is aimed to determine the variation of some leaf characters of Platanus orientalis L. depending on the climate type. For this purpose, in a country dominated by three climate types (Terrestrial, Black Sea and Mediterranean), leaves samples of Platanus orientalis trees were collected. Scaled images were obtained with the help of electron microscope (SEM = Scanning Electron Microscope) of collected leaf samples. Thus, with measurements made on these images, stoma length (µm), stoma width (µm), por length (µm), por width and stoma density (1 mm2 area). The obtained data were evaluated as statistic and the change of these characters according to climate type and city was evaluated. In addition, by applying correlation analysis to the data, it was attempted to determine the relations between the subject characters and climate data. As a result of the study, no significant effect of the climate could be detected on the characteristics examined. This situation can be interpreted that morphological characteristics are shaped by many environmental factors and genetic structure besides climate. The authors suggest an increase and diversification in studies on the subject in order to determine how and under which conditions micromorphological characteristics are shaped. For this reason, it can be shown that the subjects of the study are collected from the individuals which were primarily raised for landscaping, and the practices in landscape studies change the micro ecological conditions in a clear way.
Changes in PB, CR and CU concentrations in some bioindicators depending on traffic density on the basis of species and organs
(2019-01-01) Sevik H.; Cetin M.; Ozturk A.; Ozel H.B.; Pinar B.
The growing population and industrialization is causing air pollution. In some cities pollution has reached to a point where it is threatening human lives. Pollution has become one of the biggest issues of today’s world. Pollutants are produced by exhaust gases, car wheels, and vehicles. Heavy metals (HM) are one of the major culprits that cause air pollution. This is due to the fact that HM can exist in the environment for a long time without deterioration, and their concentration in the atmosphere is ever-growing. They also tend to bioaccumulate. Therefore, determining HM concentration levels is crucial in terms of identifying risk zones and levels. Bioindicators are the most important determinants that can indicate the change in the concentration of HM in the atmosphere. This study aims to monitor the changes in Pb, Cr and Cu concentrations in the leaves, seeds and branches of cherry plum (Prunus ceracifera), horse chestnut (Aesculus hippocastanum), Tilia (Tilia tomentosa), European ash (Fraxinus excelsior) and Norway maple (Acer platanoides) species, which can be used for monitoring the traffic-induced HM concentration. We observed that the concentration of all the elements increased according to the traffic density, this is especially visible in the case of Pb and Cr.
Varitation of stomatal characteristics in broad leaved species based on habitat
(2019-01-01) Yigit N.; Cetin M.; Ozturk A.; Sevik H.; Cetin S.
This research aims to find the habitat-dependent variation of micromorphological characteristics in the leaves of Fraxinus excelsior (European ash), Platanus orientalis (Plane tree) and Tilia tomentosa (Silver lime) collected from 6 different cities of different climates. The leaves were collected in Turkey in the cities of Rize, Samsun, İzmir, Antalya, Sivas, and Ankara. Samsun and Rize fall under the Black Sea climate region, Ankara and Sivas under the continental climate, whereas Antalya and İzmir enjoy a Mediterranean climate. Using scanning electron microscopy (SEM) to highlight the visible morphological characteristics of the plant, we hoped to uncover how stress affects the micro-morphological properties of the plant but does not affect its vital functions. Leaf epidermis images were obtained with SEM and stoma width (μm), length (μm), pore width (μm), pore length (μm), and density (in an area of 1 mm2) measurements were obtained using Image J (https://imagej.net) software. A Duncan test and variance analysis were performed via SPSS® (IBM Analytics) and the habitat-dependent change of these characteristics was evaluated statistically. Accordingly, we determined that the stomatal characteristics varied depending on the habitat, but trees were affected differently by climate conditions. The micromorphological characteristics on the leaves depending on growth conditions were also investigated.