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Full-Text Articles in Entire DC Network
Human Papillomavirus Prevalence And Type In Liquid-Based Cervical Samples From Turkish Women In A Selected Risk Group, Işin Akyar, Özlem Aydin, Mustafa Cengi̇z Yakicier, Zühtü Tanil Kocagöz, Ümi̇t İnce, İbrahi̇m Ünsal
Human Papillomavirus Prevalence And Type In Liquid-Based Cervical Samples From Turkish Women In A Selected Risk Group, Işin Akyar, Özlem Aydin, Mustafa Cengi̇z Yakicier, Zühtü Tanil Kocagöz, Ümi̇t İnce, İbrahi̇m Ünsal
Turkish Journal of Medical Sciences
To detect the prevalence and type distribution of human papillomavirus (HPV) in different cytological diagnostic categories. Materials and methods: Between 2007 and 2010, a total of 1014 liquid-based thin preparations of cervical smears were selected and classified according to cytology results. HPV DNA polymerase chain reaction (PCR) was also performed using these samples. HPV DNA-positive samples were genotyped by DNA sequencing. Results: Of those enrolled in the study, 45.3% were negative cytologically, 36.4% had atypical squamous cells of undetermined significance, 0.3% had atypical squamous cells preventing the exclusion of a high-grade squamous intraepithelial lesion, 16.8% showed a low-grade squamous intraepithelial …
Determining The Association Between Turkish Women’S Menopausal Symptoms And Their Marital Adjustment, Asli Si̇s Çeli̇k, Türkan Pasi̇nli̇oğlu
Determining The Association Between Turkish Women’S Menopausal Symptoms And Their Marital Adjustment, Asli Si̇s Çeli̇k, Türkan Pasi̇nli̇oğlu
Turkish Journal of Medical Sciences
To determine the association between women's menopausal symptoms and their marital adjustment. Materials and methods: A descriptive cross-sectional study was conducted on 263 Turkish women chosen using an improbable randomized sampling method. A questionnaire, the Menopause Symptom Rating Scale (MSRS), and the Dyadic Adjustment Scale (DAS) were used to collect data. Percentage distributions, the t-test in independent groups, the one-way ANOVA test, Pearson correlation analysis, and the Kruskal-Wallis test were used in the evaluation of the data. Results: The mean of the overall MSRS score for women was 22.67 ± 8.06 and the mean of the overall DAS score for …
Left Atrial Dilatation In Undetermined Group According To Toast Classification: Echocardiographic Assessment Of Stroke Patients, Ahu Takoğlu, Ufuk Can
Left Atrial Dilatation In Undetermined Group According To Toast Classification: Echocardiographic Assessment Of Stroke Patients, Ahu Takoğlu, Ufuk Can
Turkish Journal of Medical Sciences
To investigate the left atrial dilatation in an undetermined etiological group according to Trial of Org 10172 in Acute Stroke Treatment (TOAST) and to evaluate the relationship between left atrial dilatation and stroke volume and localization. Materials and methods: Files of patients admitted to our hospital (2000-2010) with acute ischemic stroke diagnosis were investigated. The size of their left atrium was registered using the data from transthoracic echocardiogram. Lesion size and localization were registered using brain MRI. Stroke etiology was categorized according to TOAST classification. The relationship between left atrial dilatation and stroke volume and localization in the undetermined group …
The Relationship Between Hla-G Levels And Oxidative Stress Parameters In Patients With Breast Cancer, Sema Bozali̇oğlu, Nedret Kiliç, Zuhal Yildirim, Bi̇lkay Baştürk, Osman Kurukahveci̇oğlu
The Relationship Between Hla-G Levels And Oxidative Stress Parameters In Patients With Breast Cancer, Sema Bozali̇oğlu, Nedret Kiliç, Zuhal Yildirim, Bi̇lkay Baştürk, Osman Kurukahveci̇oğlu
Turkish Journal of Medical Sciences
To investigate serum HLA-G levels and its correlation with oxidative stress and antioxidant parameters in breast cancer patients. Materials and methods: The patient group consisted of 25 individuals with breast cancer who were operated on in the General Surgery Department of Gazi University’s Faculty of Medicine. Thirty-one individuals who had no history of any kind of cancer, allergic diseases, diabetes, or rheumatic and immunological disease constituted the control group. Results: Results showed that malondialdehyde (MDA), advanced oxidation protein products (AOPPs), and HLA-G levels in the patient group were statistically and significantly high compared to the control group (P < 0.001). While vitamin C levels were significantly lower in the patient group (P < 0.05), an insignificant difference in glutathione peroxidase (GPx) and total sulfhydryl group (R-SH) levels in both groups was observed (P > 0.05). Serum …
The Value Of Apparent Diffusion Coefficient Measurements In The Differential Diagnosis Of Vertebral Bone Marrow Lesions, Gülten Taşkin, Lütfi̇ İncesu, Keri̇m Aslan
The Value Of Apparent Diffusion Coefficient Measurements In The Differential Diagnosis Of Vertebral Bone Marrow Lesions, Gülten Taşkin, Lütfi̇ İncesu, Keri̇m Aslan
Turkish Journal of Medical Sciences
To be able to differentiate benign vertebral bone marrow lesions from malign lesions according to apparent diffusion coefficient (ADC) values, enabling quantitative assessment, and to determine the sensitivity and the specificity in differentiating benign and malign lesions according to the optimal cutoff ADC value. Materials and methods: In 99 patients, 133 lesions in total were included in the study, 59 of which were benign (acute vertebral compression fracture depending on osteoporosis or trauma, spondylitis, atypical hemangioma), and 74 malign (malign compression fracture, metastasis). Each of the benign lesions was compared to the malign lesions. In the statistical analysis, normality tests, …
Rapid Identification Of Aeromonas Species In Stool Samples With Chromogenic Media And Matrix-Assisted Laser Desorption Ionization-Time Of Flight Mass Spectrometry: An Institutional Experience, Işin Akyar, Si̇mge Can
Rapid Identification Of Aeromonas Species In Stool Samples With Chromogenic Media And Matrix-Assisted Laser Desorption Ionization-Time Of Flight Mass Spectrometry: An Institutional Experience, Işin Akyar, Si̇mge Can
Turkish Journal of Medical Sciences
To evaluate the routine use of chromogenic media together with matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF) in gastrointestinal infections caused by Aeromonas spp. as rapid, practical, cost-effective and reliable methods. Materials and methods: Between August 2007 and March 2012, a total of 13,194 stool specimens of patients were included in the study. The stool samples and the reference strains were inoculated onto Cefsulodin-Irgasan-Novobiocin agar, sheep blood agar, eosin-methylene blue agar, and Hektoen enteric agar media together with CHROMagar Salmonella Plus. All the Salmonella and Aeromonas suspected colonies were identified with an automated system (Phoenix) and MALDI-TOF. Results: …
The In Vitro Determination Of Genotoxicity In Peripheral Lymphocytes Of Welders Exposed To Fumes From Metal Arc Welding, Ceylan Şener, Hali̇l Erhan Eroğlu
The In Vitro Determination Of Genotoxicity In Peripheral Lymphocytes Of Welders Exposed To Fumes From Metal Arc Welding, Ceylan Şener, Hali̇l Erhan Eroğlu
Turkish Journal of Medical Sciences
Gas metal arc welding is a widely used method in many industrial areas. In this study, the peripheral blood lymphocytes of 23 welders and 25 nonexposed subjects were monitored for genotoxicity. Materials and methods: The blood samples obtained from the subjects were incubated with a culture medium at 37 °C for 72 h. Cytochalasin-B and BrdU were added for micronucleus and replication index. After incubation, the cultures were harvested, stained, and examined. Results: The micronucleus rate (2.165 ± 1.645) of the welders was quite higher than that of those not exposed (1.352 ± 0.978) (P < 0.01). There was a significant difference between micronucleus rates of smoking and nonsmoking subjects. It was found that as the time of exposure to welding fumes increased, so did the micronucleus rates (2.938 ± 1.723) (P < 0.05). A positive correlation was observed between micronucleus frequency and age. The replication index rate (1.026 ± 0.020) of the welders was higher than that of those not exposed (1.019 ± 0.016) (P = 0.01). Conclusion: It is advised that welders who work with gas metal arc welding be instructed and that necessary protective measures be taken because of the risk caused by metal arc welding fumes.
Serum Interleukin-8, Ca-125 Levels, Neutrophil-To-Lymphocyte Ratios, And Combined Markers In The Diagnosis Of Endometriosis, Cemi̇le Dayangan Sayan, Müzeyyen Gülnur Özakşi̇t, Esma Sarikaya, Özlem Gün Eryilmaz, Leyla Mollamahmutoğlu, Rüya Deveer
Serum Interleukin-8, Ca-125 Levels, Neutrophil-To-Lymphocyte Ratios, And Combined Markers In The Diagnosis Of Endometriosis, Cemi̇le Dayangan Sayan, Müzeyyen Gülnur Özakşi̇t, Esma Sarikaya, Özlem Gün Eryilmaz, Leyla Mollamahmutoğlu, Rüya Deveer
Turkish Journal of Medical Sciences
Our aim was to investigate the usefulness of serum interleukin-8 (IL-8) and the neutrophil-to-lymphocyte ratio (NLR), either by themselves or as adjuncts to CA-125, in the diagnosis of various stages of endometriosis. Materials and methods: This study was a single-centre, prospective, group-comparative clinical trial. Serum IL-8 and the NLR, either alone or as adjuncts to CA-125, were analysed using receiver-operating characteristic (ROC) analysis to diagnose endometriosis. Fifty patients with endometriosis and 50 patients with benign ovarian cysts were included in this study. Results: The overall sensitivity and specificity of the combined markers for the detection of endometriosis were 80.0% and …
Asymmetric Dimethylarginine Levels In Allergic Rhinitis And Nasal Polyposis, Mehmet Tosun, Tayfun Apuhan
Asymmetric Dimethylarginine Levels In Allergic Rhinitis And Nasal Polyposis, Mehmet Tosun, Tayfun Apuhan
Turkish Journal of Medical Sciences
Asymmetric dimethylarginine (ADMA) is the major endogenous inhibitor of nitric oxide synthase. We aimed to investigate the ADMA levels in allergic rhinitis (AR) and nasal polyposis (NP). Materials and methods: A total of 29 AR patients, 21 NP patients, and 30 healthy subjects to be used as a control group were enrolled in the study. ADMA was measured in the AR, NP, and control groups with enzyme-linked immunosorbent assay. Any patients or control subjects with coronary artery disease, renal failure, diabetes mellitus, or hypertension were excluded from the study. Results: The mean ADMA serum concentration was 0.52 ± 0.08 µmol/L …
Epidemiology, Clinical Features, And Laboratory Detection Of Mycoplasma Pneumoniae Infection In East Azerbaijan, Iran, Reza Ghotaslou, Simin Sharifi, Mohammad Taghi Akhi, Mohammad Hossein Soroush
Epidemiology, Clinical Features, And Laboratory Detection Of Mycoplasma Pneumoniae Infection In East Azerbaijan, Iran, Reza Ghotaslou, Simin Sharifi, Mohammad Taghi Akhi, Mohammad Hossein Soroush
Turkish Journal of Medical Sciences
Mycoplasma pneumoniae is involved in the etiology of many respiratory tract infections. This prospective study describes the epidemiology and clinical properties of M. pneumoniae infections in hospitals of the Tabriz University of Medical Sciences. Materials and methods: From May 2009 to November 2010, 200 patients with respiratory tract infections were enrolled into this study. Due to antibiotic use 51 patients were excluded. M. pneumoniae from respiratory infections was detected by culture, enzyme-linked immunosorbent assay (ELISA), and polymerase chain reaction (PCR) assays. Results: M. pneumoniae infection was detected in 9 (6.15%), 8 (5.3%), and 3 (2.01%) of patients by PCR, ELISA, …
Cytokine Associated Neopterin Response Of Peripheral Blood Mononuclear Cells To In Vitro Epstein–Barr Virus Transformation Process Of B Lymphocytes, Lati̇fe Arzu Aral, Ayşegül Atak Yücel
Cytokine Associated Neopterin Response Of Peripheral Blood Mononuclear Cells To In Vitro Epstein–Barr Virus Transformation Process Of B Lymphocytes, Lati̇fe Arzu Aral, Ayşegül Atak Yücel
Turkish Journal of Medical Sciences
The Epstein-Barr Virus (EBV) is a human herpes virus that infects B lymphocytes latently and immortalises the cells due to transformation. EBV infection is asymptomatic in childhood, while it may cause a self-limiting lymphoproliferative disorder in adolescence. This study aimed to show the association between in vitro transformation of B lymphocytes via EBV and the levels of neopterin with different accompanying cytokine responses. Materials and methods: Mononuclear cells were isolated from peripheral blood samples of healthy donors and transformed with an EBV secreting cell-line, B95-8. Neopterin, interferon (IFN)-\gamma, tumour necrosis factor (TNF)-\alpha, and interleukin (IL)-6 levels were measured in culture …
Is There Any Effect Of Demographic Features On Development Of Hyperemesis Gravidarum In The Turkish Population?, Zeynep Kamalak, Nermi̇n Köşüş, Aydin Köşüş, Deni̇z Hizli, Ayli̇n Ayrim, Gonca Kurt
Is There Any Effect Of Demographic Features On Development Of Hyperemesis Gravidarum In The Turkish Population?, Zeynep Kamalak, Nermi̇n Köşüş, Aydin Köşüş, Deni̇z Hizli, Ayli̇n Ayrim, Gonca Kurt
Turkish Journal of Medical Sciences
To assess the effect of maternal demographic variables on development of hyperemesis gravidarum (HG) in pregnant Turkish women. Materials and methods: Two hundred consecutive women with HG were defined as the study group, and 200 consecutive pregnant women without any signs or symptoms of HG matched for age, parity, and gestational age were defined as the control group. Personal information, including lifestyle, educational level, occupation, and economic status were obtained via questionnaire. Results: The number of abortions was higher but parity was lower in the HG group. The time interval between 2 pregnancies was significantly shorter in the HG group …
Influence Of Trace Elements And Their Correlation With Semen Quality In Fertile And Infertile Subjects, Vickram Sundaram, Muthugadhalli Srinivas, Jayaraman Gurunathan, Kamini Rao, Ramesh Pathy Maniyan, Sridharan Balasundaram
Influence Of Trace Elements And Their Correlation With Semen Quality In Fertile And Infertile Subjects, Vickram Sundaram, Muthugadhalli Srinivas, Jayaraman Gurunathan, Kamini Rao, Ramesh Pathy Maniyan, Sridharan Balasundaram
Turkish Journal of Medical Sciences
There has been increasing curiosity about the appraisal of essential trace elements present in human body fluids and their correlation to human health. Human seminal plasma contains several trace elements that have an imperative role in the normal functioning of the semen. As a result, it is very important to evaluate Zn and other trace elements present in the seminal plasma for the assessment of male infertility. The main objective of this research is to evaluate Zn concentrations and their intercorrelations with semen parameters such as sperm concentration, sperm motility, and normal morphology of the sperm, towards their contribution to …
Effects Of Thinning Intensity On The Growth Of Narrow-Leaved Ash (Fraxinus Angustifolia Subsp. Oxycarpa) Plantations, Emrah Çi̇çek, Faruk Yilmaz, Ali̇ Kemal Özbayram, Mehmet Efe, Murat Yilmaz, Ayhan Usta
Effects Of Thinning Intensity On The Growth Of Narrow-Leaved Ash (Fraxinus Angustifolia Subsp. Oxycarpa) Plantations, Emrah Çi̇çek, Faruk Yilmaz, Ali̇ Kemal Özbayram, Mehmet Efe, Murat Yilmaz, Ayhan Usta
Turkish Journal of Agriculture and Forestry
Narrow-leaved ash (Fraxinus angustifolia) is one of the important broadleaved tree species, and it is becoming more important in European forestry because of its valuable wood and fast growing ability. Despite its wide natural range and high economic value, there is little or very limited information about the effects of thinning on the growth and development of ash stands, especially in plantations. In this study, 2 thinning experiments were carried out to determine the effects of thinning intensity on the growth of diameter, height, basal area, and volume in narrow-leaved ash plantations over a 6-year period in Adapazarı, Turkey. In …
Influence Of Salicylic Acid On Phytochelatin Synthesis In Zea Mays During Cd Stress, Gabriella Szalai, Alexander Krantev, Rusina Yordanova, Losanka Petrova Popova, Tibor Janda
Influence Of Salicylic Acid On Phytochelatin Synthesis In Zea Mays During Cd Stress, Gabriella Szalai, Alexander Krantev, Rusina Yordanova, Losanka Petrova Popova, Tibor Janda
Turkish Journal of Botany
Presoaking maize (Zea mays) seeds in salicylic acid (SA) reduces damage caused by cadmium. In the present work the possible role of phytochelatins (PCs) in SA-mediated protection against Cd toxicity was investigated. Seeds were presoaked in 0.5 mM SA, and seedlings were grown in hydroponic solution containing 0, 0.01, 0.015, or 0.025 mM Cd. Treatment with Cd increased the PC levels in maize roots, but only slight changes were observed in the leaves. Long-term exposure to Cd decreased the phytochelatin synthase (PCS) activity in the roots and led to an increase in PCS and glutathione reductase (GR) activities in maize …
Tectonosedimentary Development And Palaeoenvironmental Changes In The Acıgöl Shallow-Perennial Playa-Lake Basin, Sw Anatolia, Turkey, Cahi̇t Helvaci, Mehmet Ci̇hat Alçi̇çek, İbrahi̇m Gündoğan, Ünsal Gemi̇ci̇
Tectonosedimentary Development And Palaeoenvironmental Changes In The Acıgöl Shallow-Perennial Playa-Lake Basin, Sw Anatolia, Turkey, Cahi̇t Helvaci, Mehmet Ci̇hat Alçi̇çek, İbrahi̇m Gündoğan, Ünsal Gemi̇ci̇
Turkish Journal of Earth Sciences
The late Cenozoic extensional deformation formed several NE-trending fluvio-lacustrine basins in SW Anatolia, filled by alluvial, fluvial and lacustrine deposits. Among them, the Acıgöl basin , is notable for its tectono-sedimentary development of a prominent shallow-perennial playa-lake setting. The basin initially subsided to receive coarse-clastic alluvial deposits, merging into fluvial systems and central shallow lakes. Subsequent basin deepening with significant sediment supply from surrounding basement horsts caused gradual shrinkage of the relatively small shallow lakes, due to renewed progradation of alluvial fans and they eventually dried out completely. The sedimentation pattern and palaeoenvironmental changes record a constant tectonic, sedimentation, climatic …
Microfacies Correlation Analysis Of The Oligocene-Miocene Asmari Formation, In The Central Part Of The Rag-E-Safid Anticlinal Oil Field, Zagros Basin, South-West Iran, Mahnaz Amirshahkarami
Microfacies Correlation Analysis Of The Oligocene-Miocene Asmari Formation, In The Central Part Of The Rag-E-Safid Anticlinal Oil Field, Zagros Basin, South-West Iran, Mahnaz Amirshahkarami
Turkish Journal of Earth Sciences
The Oligocene-Miocene Asmari Formation was deposited in a carbonate ramp setting at the margin of the Zagros Basin in south-western Iran. The subsurface sedimentary successions of the Asmari Formation have been studied using cores from the Rag-e-Safid oil field, in order to determinate their microfacies and sedimentary palaeoenvironments. Based on texture analysis and faunal assemblages, 10 microfacies types have been recognised and interpreted. They indicate different depositional settings: open marine, oolitic and bioclastic shoal, lagoon, tidal flat and beach. The microfacies have been interpreted as indicative of the inner and middle ramp. In accordance with the temporal and spatial correlation …
Tragulidae (Artiodactyla, Ruminantia) From The Middle Miocene Chinji Formation Of Pakistan, Muhammad Akbar Khan, Muhammad Akhtar
Tragulidae (Artiodactyla, Ruminantia) From The Middle Miocene Chinji Formation Of Pakistan, Muhammad Akbar Khan, Muhammad Akhtar
Turkish Journal of Earth Sciences
The fossil record of the Siwalik tragulids remains poorly documented. The study of the tragulid material from the Chinji Formation allows the identification of 3 species: Dorcatherium minus, Dorcatherium majus and Dorcabune anthracotherioides. The tragulid assemblage is quite rich and Dorcatherium is the predominant taxon in the Chinji Formation of Pakistan. The fossils from the Chinji Formation of the Chakwal district, northern Pakistan, may document the first appearance of the 3 tragulid species in the Lower Siwaliks. The selenodonty and palaeoecology of the Siwalik tragulids are also discussed.
Late Holocene Climatic Oscillations Traced By Clay Mineral Assemblages And Other Palaeoceanographic Proxies In Ria De Vigo (Nw Spain), Virginia Martins, Fernando Rocha, Cristina Sequeira, Paula Martins, José Santos, Joao Alveirinho Dias, Olivier Weber, Jean-Marie Jouanneau, Belén Rubio, Daniel Rey, Ana Bernabeu, Eduardo Silva, Lázaro Laut, Rubens Figueira
Late Holocene Climatic Oscillations Traced By Clay Mineral Assemblages And Other Palaeoceanographic Proxies In Ria De Vigo (Nw Spain), Virginia Martins, Fernando Rocha, Cristina Sequeira, Paula Martins, José Santos, Joao Alveirinho Dias, Olivier Weber, Jean-Marie Jouanneau, Belén Rubio, Daniel Rey, Ana Bernabeu, Eduardo Silva, Lázaro Laut, Rubens Figueira
Turkish Journal of Earth Sciences
This work aims to study recent climatic oscillations and their influence on sedimentation in the Ria de Vigo, a coastal embayment in Galicia, NW Spain. It is based on the study of clay mineral assemblages, in conjunction with other proxies (granulometric, geochemical, geochronological and microfaunal), in the core KSGX 24. A Benthic Foraminifera High Productivity (BFHP) proxy was used to determine changes in the flux of organic matter (OM) at the bottom of the study area. Total organic carbon (TOC) content is not a suitable proxy to estimate changes in the past supply of OM due to diagenetic processes. The …
Stress Features In Terra Rossa Soil Under Traditional Olive Cultivation: A Micromorphological And Mineralogical Characterization, Salvatore Madrau, Claudio Zucca, İhsan Akşi̇t, Valeria Fiori
Stress Features In Terra Rossa Soil Under Traditional Olive Cultivation: A Micromorphological And Mineralogical Characterization, Salvatore Madrau, Claudio Zucca, İhsan Akşi̇t, Valeria Fiori
Turkish Journal of Earth Sciences
This study analyzes the micromorphological and mineralogical properties of a Terra Rossa soil under a traditional Mediterranean olive grove. It highlights the microscopic and sub-microscopic features generated by the permanent crop cover. The study area, where the land use has remained unchanged for the last 150 years, is near Sassari (Sardinia, Italy) and is characterized by dominant Terra Rossa developed on Miocene marine limestone. Two soil profiles were opened and described in July 2009, 1 under the canopy of an olive tree and 1 between the trees. Chemical and physical analyses were carried out. Undisturbed aggregates were collected from all …
Multi-Proxy Evidences Of Mid-Pleistocene Dry Climates Observed On Calcretes In Central Turkey, Ceren Küçükuysal, Asuman Günal Türkmenoğlu, Seli̇m Kapur
Multi-Proxy Evidences Of Mid-Pleistocene Dry Climates Observed On Calcretes In Central Turkey, Ceren Küçükuysal, Asuman Günal Türkmenoğlu, Seli̇m Kapur
Turkish Journal of Earth Sciences
Palaeosols are very important in reconstructing palaeoclimate studies, since they are accepted as useful climate markers and as potential providers of proxy data. The study of the palaeosols of the Plio-Pleistocene rock sequences around Ankara revealed evidence for a reconstruction of the Quaternary palaeoclimate of the region. The study area is located in Bala, south-east of Ankara, which contains Middle Pleistocene red palaeosols with powdery to nodular calcrete developments, alternating with channel deposits. During this warm and arid period in the Pleistocene, the limited water available in the soil led to the accumulation of low magnesian carbonates, forming calcretes. The …
Stable Isotope-Based Reconstruction Of Oligo-Miocene Paleoenvironment And Paleohydrology Of Central Anatolian Lake Basins (Turkey), Tina Lüdecke, Tamás Mikes, Fuat Bora Rojay, Michael A. Cosca, Andreas Mulch
Stable Isotope-Based Reconstruction Of Oligo-Miocene Paleoenvironment And Paleohydrology Of Central Anatolian Lake Basins (Turkey), Tina Lüdecke, Tamás Mikes, Fuat Bora Rojay, Michael A. Cosca, Andreas Mulch
Turkish Journal of Earth Sciences
Isotope geochemistry of lacustrine carbonate represents a powerful tool to reconstruct paleoclimatic and paleoenvironmental conditions. Here, we present a comprehensive set of long-term oxygen (delta^{18}O) and carbon (delta^{13}C) stable isotope records from 5 Chattian to Burdigalian lacustrine sequences distributed over the Central Anatolian Plateau. Field relationships combined with stable isotope geochemistry indicate a relatively humid subtropic Late Oligocene climate with an environment characterized by large, temporally open freshwater lakes. Approximately during the middle Aquitanian, a 4%o-5%o increase in lake delta^{18}O values indicates changes in regional climate including more arid conditions and an increasing dominance of closed saline lake conditions in …
Circum-Tethyan Carbonate Platform Evolution During The Palaeogene: The Prebetic Platform As A Test For Climatically Controlled Facies Shifts, Stefan Höntzsch, Christian Scheibner, Johannes P. Brock, Jochen Kuss
Circum-Tethyan Carbonate Platform Evolution During The Palaeogene: The Prebetic Platform As A Test For Climatically Controlled Facies Shifts, Stefan Höntzsch, Christian Scheibner, Johannes P. Brock, Jochen Kuss
Turkish Journal of Earth Sciences
The distribution of selected shallow-benthic biota at circum-Tethyan carbonate platforms demonstrates an excellent proxy for the impact of latitudinally controlled cooling and variations in the trophic resources during the Palaeogene. In this study, we link and compare the spatial distribution and abundance of larger benthic foraminifera and hermatypic corals of Tethyan carbonate successions with new records from the Prebetic platform in SE Spain. The succession of the Prebetic platform is dominated by larger benthic foraminifera and coralline red algae throughout the Eocene, whereas corals were not recorded until the Late Eocene. Similar biotic trends were reported from 10 selected circum-Tethyan …
Impact Of Pb-Zn Mining Activity On Surficial Sediments Of Lake Kalimanci(Fyr Macedonia), Petra Vrhovnik, Nastja Rogan Smuc, Tadej Dolenec, Todor Serafimovski, Matej Dolenec
Impact Of Pb-Zn Mining Activity On Surficial Sediments Of Lake Kalimanci(Fyr Macedonia), Petra Vrhovnik, Nastja Rogan Smuc, Tadej Dolenec, Todor Serafimovski, Matej Dolenec
Turkish Journal of Earth Sciences
The activities of the Sasa mine have led to industrial discharge being released into Lake Kalimanci since the beginning of mining activity in 1954. For this reason, an ecological risk assessment is urgently required. In the present study, surficial lake sediments were analyzed using inductively coupled plasma mass spectrometry (ICP-MS), with all geochemistry data processed using Statistica 8. In order to assess the environmental pollution status, 2 environmental factors were established, while for the determination of chemical fractionation of toxic metals a sequential extraction procedure was carried out. Concentrations of As, Mo, Zn, Ni, Co, Pb, Cd, and Cu in …
Computation Of Grade Values Of Sediment-Hosted Barite Deposits In Northeastern Isparta (Western Turkey), Numan Elmas, Uğur Şahi̇n
Computation Of Grade Values Of Sediment-Hosted Barite Deposits In Northeastern Isparta (Western Turkey), Numan Elmas, Uğur Şahi̇n
Turkish Journal of Earth Sciences
Grade value is a crucial parameter for the mineral industry. Investigation of grade value of mineral resources provides the optimum benefit. In this study, an adaptive neuro-fuzzy inference system (ANFIS) and artificial neural network (ANN) model were applied for the prediction of grade values. The spatial coordinates X, Y, and Z of the study area along with bore hole geochemical data were used as input variables in the model. In order to illustrate the applicability and capability of these methods, the western part of Turkey, between the latitudes 38°01 45 N and 38°09 52 N and between the longitudes 31°23 …
Antimicrobial Activity And Chemical Composition Of The Essential Oils Of Mosses (Hylocomium Splendens (Hedw.) Schimp. And Leucodon Sciuroides (Hedw.) Schwägr.) Growing In Turkey, Tayyi̇be Beyza Cansu, Büşra Yayli, Turan Özdemi̇r, Nevzat Batan, Şengül Alpay Karaoğlu, Nuretti̇n Yayli
Antimicrobial Activity And Chemical Composition Of The Essential Oils Of Mosses (Hylocomium Splendens (Hedw.) Schimp. And Leucodon Sciuroides (Hedw.) Schwägr.) Growing In Turkey, Tayyi̇be Beyza Cansu, Büşra Yayli, Turan Özdemi̇r, Nevzat Batan, Şengül Alpay Karaoğlu, Nuretti̇n Yayli
Turkish Journal of Chemistry
In the present work, the volatiles of mosses [Hylocomium splendens (Hedw.) Schimp. (Hylocomiaceae) and Leucodon sciuroides (Hedw.) Schwägr. (Leucodontaceae)] have been investigated by GC-FID and GC/MS. Fifty-eight compounds in the oil of H. splendens, representing 75.4%, and 41 compounds in the oil of L. sciuroides, representing 87.6%, were identified. The major components were found to be \beta-pinene (11.6%) and \alpha-pinene (8.9%) in the oil of H. splendens, and nonanal (26.8%) and heptanal (13.7%) in the oil of L. sciuroides. The essential oil of H. splendens was rich in monoterpenes (30.8%), and aldehydes (49.9%) were the major constituents in the oil …
Synthesis And Characterization Of New Chromogenic Substrates For Exoglycosidases: \Alpha-Glucosidase, \Alpha-Mannosidase, And \Beta-Galactosidase, Dumitru Petru Iga, Richard Schmidt, Silvia Iga, Corina Loredana Hotoleanu, Florentina Duica, Alina Nicolescu, Silvia Stefania Gitman
Synthesis And Characterization Of New Chromogenic Substrates For Exoglycosidases: \Alpha-Glucosidase, \Alpha-Mannosidase, And \Beta-Galactosidase, Dumitru Petru Iga, Richard Schmidt, Silvia Iga, Corina Loredana Hotoleanu, Florentina Duica, Alina Nicolescu, Silvia Stefania Gitman
Turkish Journal of Chemistry
Glycosides of 4-nitrocatechol (1,2-dihydroxy 4-nitrobenzene) with \alpha-D-glucopyranose and \alpha-D-mannopyranose were synthesized by the glycosylation of phenol with peracetylated sugars in the presence of BF_3\cdot OBu_2. The glycoside of 4-nitrocatechol with \beta-D-galactopyranose was prepared by the glycosylation of this phenol as sodium phenoxide with tetra-O-benzoyl-\alpha-D- galactopyranosyl bromide. The structure of the reaction products was confirmed by ^1 H and ^{13}C NMR spectra and by chemical analysis. The latter consisted of acidic hydrolysis, followed by ethyl ether extraction and colorimetric determination of 4-nitrocatechol in the ether phase and application of the anthrone method for the sugar in the water phase. The synthetic …
Anticholinesterase Furocoumarins From Heracleum Platytaenium, A Species Endemic To The Ida Mountains, Demet Di̇ncel, Seda Damla Hatipoğlu, Ahmet Ceyhan Gören, Gülaçti Topçu
Anticholinesterase Furocoumarins From Heracleum Platytaenium, A Species Endemic To The Ida Mountains, Demet Di̇ncel, Seda Damla Hatipoğlu, Ahmet Ceyhan Gören, Gülaçti Topçu
Turkish Journal of Chemistry
The petroleum ether extract of Heracleum platytaenium afforded 8 furocoumarins (psoralen, bergapten, xanthotoxin, pimpinellin, isopimpinellin, sphondin, byakangelicin, and heraclenol) and the methanol extract of H. platytaenium gave only 1 glycosylated dihydrofurocoumarin, apterin. In addition, stigmasterol was also obtained from petroleum ether extract. Structure identification of the isolated compounds has been achieved by using spectroscopic methods, namely 1D and 2D NMR experiments and mass spectral analyses. The antioxidant activity of the extracts and pure compounds was investigated by 2 methods, including DPPH free radical scavenging activity and lipid peroxidation inhibitory activity by \beta-carotene-linoleic acid assays. The anticholinesterase activity of petroleum ether …
Optimization Of Synthesizing Glucose 1-Phosphate By Sodium Tripolyphosphate As A Phosphorus Acylating Agent Using Response Surface Methodology, Li 'E Jin, Fenfen Chang, Xiao Juan Wang, Qing Cao
Optimization Of Synthesizing Glucose 1-Phosphate By Sodium Tripolyphosphate As A Phosphorus Acylating Agent Using Response Surface Methodology, Li 'E Jin, Fenfen Chang, Xiao Juan Wang, Qing Cao
Turkish Journal of Chemistry
With glucose as the starting material, sodium tripolyphosphate as the phosphorus acylating agent, and urea as the catalyst, glucose 1-phosphate was synthesized and its properties were analyzed. The synthesis conditions were selected according to the phosphorus content and optimized through the response surface methodology (RSM), based on a 3-level, 3-variable Box--Behnken experimental design. The results showed that the phosphorus content of glucose 1-phosphate was 8.12% using a reaction temperature of 70 °C, a molar ratio of glucose to sodium tripolyphosphate of 1.54:1, and catalyst amount of 3.7 g. It coincided well with the experimental value (8.34%). The structure of the …