Browsing by Publisher "Ekoloji"

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    Alternative concepts and widespread beliefs among 7th grade students related to snakes; [İlköǧretim 7. Sınıf öǧrencilerinde yılanlarla i̇lgili alternatif kavramlar ve yaygın i̇nanışlar]
    (Ekoloji, 2009) Oluk S.
    In this study, alternative conceptions and myths concerning with snakes of 7th grade students were investigated. The study sample consisted of 423 students (211 girls, 202 boys) in nine cities (Adi{dotless}yaman, Aydi{dotless}n, Denizli, Diyarbaki{dotless}r, Gaziantep, i{dotless}zmir, Mardin, Muş, Batman). Data were gathered through a questionnaire consisting of 28 items, which was developed by the researcher. The items in the questionnaire were grupped under four sections as; venom and emergency medical treatment for snake bites; human-snake relationships and myths; feeding habits of snakes; classification and morphological properties of snakes. Statistical analysis showed that; students don't have enough knowledge about snakes and therefore they have various alternative conceptions; common beliefs are frequently observed among students and they are the causes of alternative conceptions.
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    Some heavy metal determination by ICP-OES in human scalp hair (In three different regions of Manisa); [İnsan saçında bulunan (Manisa İlinin üç farklı yerleşim bölgesinde) Bazı aǧir metallerin ICP-OES yöntemi ile tayini]
    (Ekoloji, 2009) Çelik A.; Abali Y.; Edgünlü G.; Uzunoǧlu S.; Tirtom V.N.
    The aim of this study was to determine the levels of As, Cd, Mn, Cr, Fe, Pb, Hg, Zn and Se in hair samples collected from the nape of the neck of voluntary people living or working in the industrial region, city center and countryside of Manisa province. The concentrations of As, Cd, Mn, Cr, Fe, Pb, Se, Zn were determined by ICP-OES. The measured values of trace elements in human hair samples were compatible to the reference values given in the literature. The measured values of As, Hg, Cr, Cd, Se and Pb were found below the detection limit of the method. Zn, Mn and Fe were statistically analysed and evaluated. When the Fe and Mn values of the hair samples collected from the industrial region were compared with the data from both the city center and countryside (ANOVA), the differences were meaningful and significant, but the differences for Zn between the industrial region, city center and countryside were found to be insignificant.
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    A study of trace element contents in plants growing at Honaz Dagi-Denizli, Turkey; [Honaz Daǧı-Denizli, Türkiye'de yetişen bitkilerde i̇z element i̇çerikleri üzerine bir çalışma]
    (Ekoloji, 2009) Baslar S.; Kula I.; Dogan Y.; Yildiz D.; Ay G.
    Denizli is one of the rapidly developing states in the West Anatolian Region of Turkey. Keeping this in view, 30 different plants were selected to study their potential as biomonitors of trace elements like Pb, Cd, Ni, Zn, Fe and Mn (μg g-1, dry weight). The samples were collected from two different altitudes of Honaz Dagi, a mauntain overlooking at state of Denizli. The concentrations of trace elements were determined by flame atomic absorption spectrometry (FAAS). The mean concentrations determined at 1000 m altitude ranged between 0.273 to 0.488, 0.099 to 0.488, 0.306 to 0.682, 1.017 to 3.744, and 0.148 to 0.674 (μg g-1, dry weight), of Pb, Ni, Zn, Fe and Mn, respectively. At 1600 m altitude, the values ranged between 0.225 to 0.534, 0.150 to 0.842, 0.234 to 0.905, 1.082 to 3.864 and 0.023 to 0.982 (μg g-1, dry weight) of Pb, Ni, Zn, Fe, Pb and Mn, respectively. No Cd was detected at both altitudes.
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    Production and characterization of wall plaster with borax and paper wastes and perlite additives; [Atık bor, atık kâǧıt ve perlit katkılı sıva: Malzemesinin üretimi ve karakterizasyonu]
    (Ekoloji, 2009) Batar T.; Köksal N.S.; Yersel Ş.E.
    In this study, a new wall plaster product was generated using 0-5% perlite, 0-2.5% waste paper and 3.5-17.7% waste calcined borax. The optimum ratios for the additives were 3% perlite, 1.5% waste paper and .1% waste calcined borax. The new plaster was subjected to mechanical strength and thermal transmittance measurements using TS 825 and TS 12808-3 Turkish standards. Under optimal mixing ratios, the plaster had a thermal conductivity of 0.17 W/m2K and a mechanical strength (bending) of 61.44 kg/cm2. The required standards by TSE 825 are 0.13 W/m2K. When the new product was compared with the existing plasters in the market, it was observed that thermal transmittance and mechanical strength were both increased by 26% and 31%, respectively. Thus, a new environmental-friendly wall plaster product was produced.