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2021

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Articles 194761 - 194790 of 195874

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Identification Of Differentially Expressed Genomic Repeats In Primary Hepatocellular Carcinoma And Their Potential Links To Biological Processes And Survival, Gökhan Karakülah, Ci̇hangi̇r Yandim Jan 2021

Identification Of Differentially Expressed Genomic Repeats In Primary Hepatocellular Carcinoma And Their Potential Links To Biological Processes And Survival, Gökhan Karakülah, Ci̇hangi̇r Yandim

Turkish Journal of Biology

Hepatocellular carcinoma (HCC) is one of the deadliest cancers. Research on HCC so far primarily focused on genes and provided limited information on genomic repeats, which constitute more than half of the human genome and contribute to genomic stability. In line with this, repeat dysregulation was significantly shown to be pathological in various cancers and other diseases. In this study, we aimed to determine the full repeat expression profile of HCC for the first time. We utilised two independent RNA-seq datasets obtained from primary HCC tumours with matched normal tissues of 20 and 17 HCC patients, respectively. We quantified repeat …

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Investigation Of The Efficacy Of Paclitaxel On Some Mirnas Profiles In Breast Cancer Stem Cells, Eli̇f Ertürk, Ferda Ari, Oğuzhan Akgün, Engi̇n Ulukaya, Cem İsmai̇l Küçükali̇, Şaki̇r Ümi̇t Zeybek Jan 2021

Investigation Of The Efficacy Of Paclitaxel On Some Mirnas Profiles In Breast Cancer Stem Cells, Eli̇f Ertürk, Ferda Ari, Oğuzhan Akgün, Engi̇n Ulukaya, Cem İsmai̇l Küçükali̇, Şaki̇r Ümi̇t Zeybek

Turkish Journal of Biology

Understanding of the functions of microRNAs in breast cancer and breast cancer stem cells have been a hope for the development of new molecular targeted therapies. Here, it is aimed to investigate the differences in the expression levels of let-7a, miR-10b, miR-21, miR-125b, miR-145, miR-155, miR-200c, miR-221, miR-222 and miR-335, which associated with gene and proteins in MCF-7 (parental) and MCF-7s (Mammosphere/stem cell-enriched population/CD44+/CD24-cells) cells treated with paclitaxel. MCF-7s were obtained from parental MCF-7 cells. Cytotoxic activity of paclitaxel was determined by ATP assay. Total RNA isolation and cDNA conversion were performed from the samples. Changes in expression levels of …

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Phylostat: A Web-Based Tool To Analyze Paralogous Clade Divergencein Phylogenetic Trees, Eli̇f Özçeli̇k, Nurdan Kuru, Ogün Adebali̇ Jan 2021

Phylostat: A Web-Based Tool To Analyze Paralogous Clade Divergencein Phylogenetic Trees, Eli̇f Özçeli̇k, Nurdan Kuru, Ogün Adebali̇

Turkish Journal of Biology

Phylogenetic trees are useful tools to infer evolutionary relationships between genetic entities. Phylogenetics enables not only evolution-based gene clustering but also the assignment of gene duplication and deletion events to the nodes when coupled with statistical approaches such as bootstrapping. However, extensive gene duplication and deletion events bring along a challenge in interpreting phylogenetic trees and require manual inference. In particular, there has been no robust method of determining whether one of the paralog clades systematically shows higher divergence following the gene duplication event as a sign of functional divergence. Here, we provide Phylostat, a graphical user interface that enables …

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Identifying Specific Matrix Metalloproteinase-2-Inhibiting Peptides Through Phage Display-Based Subtractive Screening, Ayli̇n Özdemi̇r Bahadir, Bertan Koray Balcioğlu, Müge Serhatli, Şeyma Işik, Berri̇n Erdağ Jan 2021

Identifying Specific Matrix Metalloproteinase-2-Inhibiting Peptides Through Phage Display-Based Subtractive Screening, Ayli̇n Özdemi̇r Bahadir, Bertan Koray Balcioğlu, Müge Serhatli, Şeyma Işik, Berri̇n Erdağ

Turkish Journal of Biology

Gelatinases A and B, which are members of the matrix metalloproteinase (MMP) family, play essential roles in cancer development and metastasis, as they can break down basal membranes. Therefore, the determination and inhibition of gelatinases is essential for cancer treatment. Peptides that can specifically block each gelatinase may, therefore, be useful for cancer treatment. In this study, subtractive panning was carried out using a 12-mer peptide library to identify peptides that block gelatinase A activity (MMP-2), which is a key pharmacological target. Using this method, 17 unique peptide sequences were determined. MMP-2 inhibition by these peptides was evaluated through zymogram …

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Combination Of Classical And Statistical Approaches To Enhance The Fermentation Conditions And Increase The Yield Of Lipopeptide(S) By Pseudomonas Sp. Oxdc12: Its Partial Purification And Determining Antifungal Property, Vivek Chauhan, Vivek Dhiman, Shamsher S. Kanwar Jan 2021

Combination Of Classical And Statistical Approaches To Enhance The Fermentation Conditions And Increase The Yield Of Lipopeptide(S) By Pseudomonas Sp. Oxdc12: Its Partial Purification And Determining Antifungal Property, Vivek Chauhan, Vivek Dhiman, Shamsher S. Kanwar

Turkish Journal of Biology

Around 200 different lipopeptides (LPs) have been identified to date, most of which are produced via Bacillus and Pseudomonas species. The clinical nature of the lipopeptide (LP) has led to a big surge in its research. They show antimicrobial and antitumor activities due to which mass-scale production and purification of LPs are beneficial. Response surface methodology (RSM) approach has emerged as an alternative in the field of computational biology for optimizing the reaction parameters using statistical models. In the present study, Pseudomonas sp. strain OXDC12 was used for production and partial purification of LPs using Thin Layer Chromatography (TLC). The …

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Cover And Contents Jan 2021

Cover And Contents

Turkish Journal of Biology

No abstract provided.

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The Effect Of Weekend Curfews On Epidemics: A Monte Carlo Simulation, Hakan Kaygusuz, Ahmet Ni̇hat Berker Jan 2021

The Effect Of Weekend Curfews On Epidemics: A Monte Carlo Simulation, Hakan Kaygusuz, Ahmet Ni̇hat Berker

Turkish Journal of Biology

The ongoing COVID-19 pandemic is being responded with various methods, applying vaccines, experimental treatment options, total lockdowns or partial curfews. Weekend curfews are among the methods for reducing the number of infected persons, and this method is practically applied in some countries such as Turkey. In this study, the effect of weekend curfews on reducing the spread of a contagious disease, such as COVID-19, is modeled using a Monte Carlo algorithm with a hybrid lattice model. In the simulation setup, a fictional country with three towns and 26,610 citizens were used as a model. Results indicate that applying a weekend …

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In Silico Drug Repositioning Against Human Nrp1 To Block Sars-Cov-2 Host Entry, Şeref Gül Jan 2021

In Silico Drug Repositioning Against Human Nrp1 To Block Sars-Cov-2 Host Entry, Şeref Gül

Turkish Journal of Biology

Despite COVID-19 turned into a pandemic, no approved drug for the treatment or globally available vaccine is out yet. In such a global emergency, drug repurposing approach that bypasses a costly and long-time demanding drug discovery process is an effective way in search of finding drugs for the COVID-19 treatment. Recent studies showed that SARS-CoV-2 uses neuropilin-1 (NRP1) for host entry. Here we took advantage of structural information of the NRP1 in complex with C-terminal of spike (S) protein of SARSCoV- 2 to identify drugs that may inhibit NRP1 and S protein interaction. U.S. Food and Drug Administration (FDA) approved …

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Binary-Qsar Guided Virtual Screening Of Fda Approved Drugs And Compounds In Clinical Investigation Against Sars-Cov-2 Main Protease, Lalehan Oktay, Ece Erdemoğlu, İlayda Tolu, Yeşi̇m Yumak, Ayşenur Özcan, Eli̇f Acar, Şehri̇ban Büyükkiliç, Alpsu Olkan, Serdar Durdaği Jan 2021

Binary-Qsar Guided Virtual Screening Of Fda Approved Drugs And Compounds In Clinical Investigation Against Sars-Cov-2 Main Protease, Lalehan Oktay, Ece Erdemoğlu, İlayda Tolu, Yeşi̇m Yumak, Ayşenur Özcan, Eli̇f Acar, Şehri̇ban Büyükkiliç, Alpsu Olkan, Serdar Durdaği

Turkish Journal of Biology

With the emergence of the new SARS-CoV-2 virus, drug repurposing studies have gained substantial importance. Combined with the efficacy of recent improvements in ligand- and target-based virtual screening approaches, virtual screening has become faster and more productive than ever. In the current study, an FDA library of approved drugs and compounds under clinical investigation were screened for their antiviral activity using the antiviral therapeutic activity binary QSAR model of the MetaCore/MetaDrug platform. Among 6733-compound collection, we found 370 compounds with a normalized therapeutic activity value greater than a cutoff of 0.75. Only these selected compounds were used for molecular docking …

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The Current State Of Validated Small Molecules Inhibiting Sars-Cov-2 Non-Structural Proteins, Fati̇h Kocabaş, Merve Uslu Jan 2021

The Current State Of Validated Small Molecules Inhibiting Sars-Cov-2 Non-Structural Proteins, Fati̇h Kocabaş, Merve Uslu

Turkish Journal of Biology

The current COVID-19 outbreak has had a profound influence on public health and daily life. Despite all restrictions and vaccination programs, COVID-19 still can lead to fatality due to a lack of COVID-19-specific treatments. A number of studies have demonstrated the feasibility to develop therapeutics by targeting underlying components of the viral proteome. Here we reviewed recently developed and validated small molecule inhibitors of SARS-CoV-2's nonstructural proteins. We described the validation level of identified compounds specific for SARS-CoV-2 in the presence of in vitro and in vivo supporting data. The mechanisms of pharmacological activity, as well as approaches for developing …

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Coronavac (Sinovac) Covid-19 Vaccine-Induced Molecular Changes In Healthy Human Serum By Infrared Spectroscopy Coupled With Chemometrics, Ayça Doğan Mollaoğlu, Rafi̇g Gurbanov, Mete Severcan, Feri̇de Severcan Jan 2021

Coronavac (Sinovac) Covid-19 Vaccine-Induced Molecular Changes In Healthy Human Serum By Infrared Spectroscopy Coupled With Chemometrics, Ayça Doğan Mollaoğlu, Rafi̇g Gurbanov, Mete Severcan, Feri̇de Severcan

Turkish Journal of Biology

From the beginning of the COVID-19 coronavirus pandemic in December of 2019, the disease has infected millions of people worldwide and caused hundreds of thousands of deaths. Since then, several vaccines have been developed. One of those vaccines is inactivated CoronaVac-Sinovac COVID-19 vaccine. In this proof of concept study, we first aimed to determine CoronaVac-induced biomolecular changes in healthy human serum using infrared spectroscopy. Our second aim was to see whether the vaccinated group can be separated or not from the non-vaccinated group by applying chemometric techniques to spectral data. The results revealed that the vaccine administration induced significant changes …

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Pothole Detection Under Diverse Conditions Using Object Detection Model, Ibrahim Hassan Syed, Dympna O'Sullivan, Susan Mckeever Jan 2021

Pothole Detection Under Diverse Conditions Using Object Detection Model, Ibrahim Hassan Syed, Dympna O'Sullivan, Susan Mckeever

Datasets

One of the most important tasks in road maintenance is the detection of potholes. This process is usually done through manual visual inspection, where certified engineers assess recorded images of pavements acquired using cameras or professional road assessment vehicles. Machine learning techniques are now being applied to this problem, with models trained to automatically identify road conditions. However, approaching this real-world problem with machine learning techniques presents the classic problem of how to produce generalizable models. Images and videos may be captured in different illumination conditions, with different camera types, camera angles and resolutions. In this paper we present our …

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Bioerosional Structures From The Late Pleistocene Coral Reef, Red Sea Coast, Northwest Saudi Arabia, Huri̇ye Demi̇rcan, Abdelbaset El Sorogy, Talal Alharbi Jan 2021

Bioerosional Structures From The Late Pleistocene Coral Reef, Red Sea Coast, Northwest Saudi Arabia, Huri̇ye Demi̇rcan, Abdelbaset El Sorogy, Talal Alharbi

Turkish Journal of Earth Sciences

Herein, 20 ichnospecies belonging to 8 ichnogenera were identified in bivalves, gastropods, and corals (n = 701) from the Late Pleistocene coral reef along the Red Sea coast, northwest Saudi Arabia. The trace fossils were produced by clionid sponges (47.39%), endolithic bivalves (42.17%), polychaete annelids (5.42%), vermetid gastropods (3.81%), and acrothoracican barnacles (1.21%). The recognized ichnotaxa were Entobia geometrica, E. ovula, E. cf. goniodes, E. cf. retiformis, E. cretacea, Entobia isp., Gastrochaenolites torpedo, G. lapidicus, G. cf. dijugus, Gastrochaenolites isp., Oichnus paraboloides, O. simplex, Oichnus isp., Caulostrepsis taeniola, Caulostrepsis isp., Maeandropolydora cf. sulcans, Maeandropolydora isp., Renichnus isp., Centrichnus isp., and …

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Interpretation Of Aeromagnetic Data Of The Sivas Basin In The Central Eastern Turkey, Funda Bi̇li̇m, Atti̇la Aydemi̇r Jan 2021

Interpretation Of Aeromagnetic Data Of The Sivas Basin In The Central Eastern Turkey, Funda Bi̇li̇m, Atti̇la Aydemi̇r

Turkish Journal of Earth Sciences

The Sivas Basin is located in the eastern part of the central Anatolia. In this study, aeromagnetic data in the basin and surrounding area are processed and anomalies are interpreted to determine the approximate locations of the causative bodies and reveal their relationship with the tectonic trends. The sedimentary basin is surrounded by strong magnetic anomalies from the south, east, and northeast. The most apparent anomalies are observed in the E-NE of Zara, SW of Divriği, and north of Kangal. These anomalies do not present significant directional change when they are reduced to the pole process. Causative bodies of the …

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Time Frame For Future Large Earthquakes Near İstanbul Based On East-To-West Deceleratingfailure Of The North Anatolian Fault, Fati̇h Bulut, Asli Doğru Jan 2021

Time Frame For Future Large Earthquakes Near İstanbul Based On East-To-West Deceleratingfailure Of The North Anatolian Fault, Fati̇h Bulut, Asli Doğru

Turkish Journal of Earth Sciences

Large earthquakes that have occurred along the North Anatolian Fault (NAF) were analysed to elaborate the time frame of future large earthquakes near İstanbul. The historical earthquake catalog that was compiled covered 1 nearly complete and 2 fully complete failures of the NAF between 1250 and 2000 AD. These data were used to investigate the space-time systematics of M ≥ 7.0 earthquakes. The catalogue identified an east-to-west decelerating domino-like failure of the NAF. The deceleration starts around the western tip of the 1944 Gerede rupture. This suggested that failure of the remaining unruptured ~250-km section in the west (İstanbul to …

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Earthquake History Of The Yatağan Fault (Muğla, Sw Turkey): Implications For Regionalseismic Hazard Assessment And Paleoseismology In Extensional Provinces, Mehran Basmenji, Hüsnü Serdar Akyüz, Erdem Kirkan, Murat Ersen Aksoy, Gülsen Uçarkuş, Nuretti̇n Yakupoğlu Jan 2021

Earthquake History Of The Yatağan Fault (Muğla, Sw Turkey): Implications For Regionalseismic Hazard Assessment And Paleoseismology In Extensional Provinces, Mehran Basmenji, Hüsnü Serdar Akyüz, Erdem Kirkan, Murat Ersen Aksoy, Gülsen Uçarkuş, Nuretti̇n Yakupoğlu

Turkish Journal of Earth Sciences

The southern part of the Western Anatolia Extensional Province is governed by E-W-trending horst-graben systems and NW-SE-oriented active faults. The NW-striking Yatağan Fault is characterised by an almost pure normal sense of motion with a minor dextral strike slip component. Although the settlements within the area have been affected by several earthquake events since ancient times (~2000 BCE), the earthquake potential and history of the Yatağan Fault has remained unknown until a few years ago. Considering the growing dense population within the area, paleoseismology studies were conducted in order to illuminate the historical earthquake activity on the Yatağan Fault. Two …

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Time-Dependent Model For Earthquake Occurrence And Effects Of Design Spectra Onstructural Performance: A Case Study From The North Anatolian Fault Zone, Turkey, Ercan Işik, Yunus Levent Eki̇nci̇, Ni̇lgün Lütfi̇ye Sayil, Aydin Büyüksaraç, Mehmet Ci̇han Aydin Jan 2021

Time-Dependent Model For Earthquake Occurrence And Effects Of Design Spectra Onstructural Performance: A Case Study From The North Anatolian Fault Zone, Turkey, Ercan Işik, Yunus Levent Eki̇nci̇, Ni̇lgün Lütfi̇ye Sayil, Aydin Büyüksaraç, Mehmet Ci̇han Aydin

Turkish Journal of Earth Sciences

We have investigated the time-dependent seismicity model of the earthquake occurrence on a regional basis through the North Anatolian Fault Zone (NAFZ). To that end, the studied region has been subdivided into 7 seismogenic zones considering the seismotectonic criteria, and then regional time and magnitude predictable (RTIMAP) model has been performed. Intervened times and magnitudes of main shocks produced in each zone have predictive properties defined by the RTIMAP. The probabilities of the next main shocks in 5 decades and the magnitudes of the next events have been estimated using the formation time and magnitude of the past events in …

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Cover And Contents Jan 2021

Cover And Contents

Turkish Journal of Earth Sciences

No abstract provided.

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Peritectic Assemblage Entrainment And Mafic-Felsic Magma Interaction In Thelate Oligocene-Early Miocene Karadağ Pluton In The Biga Peninsula, Northwest Turkey:Petrogenesis And Geodynamic Implications, Namik Aysal, Abdullah Si̇nan Öngen, Sabah Yilmaz Şahi̇n, Cem Kasapçi, Nurullah Hani̇lçi̇, Irena Peytcheva Jan 2021

Peritectic Assemblage Entrainment And Mafic-Felsic Magma Interaction In Thelate Oligocene-Early Miocene Karadağ Pluton In The Biga Peninsula, Northwest Turkey:Petrogenesis And Geodynamic Implications, Namik Aysal, Abdullah Si̇nan Öngen, Sabah Yilmaz Şahi̇n, Cem Kasapçi, Nurullah Hani̇lçi̇, Irena Peytcheva

Turkish Journal of Earth Sciences

The Hellenic subduction system governs the entire Aegean region through the creation of a migrating magmatic arc that has existed since the beginning of the Early Cenozoic. The Karadağ Pluton is situated in the NW part of Turkey and represents one of the distinct snapshots of this subduction system during the Late Oligocene-Early Miocene Period.iod. It consists of 2 major lithological units, based on their petrographic and geochemical features, comprising: 1) main plutonic facies (SiO2 < 70 wt.%) that are dominated by hornblende- and biotite-bearing monzogranite, quartz monzonite, and granodiorite, and 2) late-stage more felsic facies (SiO2 > 70 wt.%) that are represented by cordierite-free and cordierite-bearing leucogranites. Zircon U-Pb laser ablation inductively-coupled plasma mass spectrometry and K-Ar dating revealed crystallization and cooling …

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First Report Of Myalinid Bivalves In The Lower Carboniferous Of The Hakkari Basin, Se Turkey: Paleoecologic And Paleogeographic Implications, İzzet Hoşgör Jan 2021

First Report Of Myalinid Bivalves In The Lower Carboniferous Of The Hakkari Basin, Se Turkey: Paleoecologic And Paleogeographic Implications, İzzet Hoşgör

Turkish Journal of Earth Sciences

Knowledge of the Late Paleozoic sedimentary history of the northern Gondwana shelf is advanced by new data from the Şort Dere section (Hakkari Basin). Early Carboniferous myalinid bivalves from the Middle East are reported here for the first time. The pre-Permian basement of the Hakkari Basin consists of a Lower Carboniferous sedimentary sequence including the Köprülü and Belek formations. The Köprülü Formation has yielded rich assemblages of vertebrates and invertebrates. Hitherto myalinid bivalves were unknown from this formation; this paper reports the discovery of small and poorly calcified myaliniform shells from two thin beds in the middle part of the …

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Alaşehir Type - Rolling Hinge Mechanism In The Northern Margin Of Büyük Menderes Graben: Evidence From Seismic Reflection And Recent Thermochronological Data, Fevzi̇ Mert Türesi̇n, Gürol Seyi̇toğlu Jan 2021

Alaşehir Type - Rolling Hinge Mechanism In The Northern Margin Of Büyük Menderes Graben: Evidence From Seismic Reflection And Recent Thermochronological Data, Fevzi̇ Mert Türesi̇n, Gürol Seyi̇toğlu

Turkish Journal of Earth Sciences

Isotopic and thermochronological data were recently obtained from the footwall of the Büyük Menderes detachment ranges from 29.0 ± 1.9 Ma (ZFT) to 1.6 ± 0.2 Ma (Ap U - Th / He), and they can be grouped in three different time intervals. These results are well explained by the Alaşehir type-rolling hinge mechanism, which suggests active rotated initial normal fault during successive normal fault development of the graben formation. This paper suggests that the Alaşehir type-rolling hinge mechanism is applicable to the Büyük Menderes graben by using field observations, published isotopic / thermochronological and subsurface data. It also contributes …

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12th June 2017 Offshore Karaburun-Lesvos Island Earthquake Coseismic Deformation Analysis Using Continuous Gps And Seismological Data, Hasan Yildiz, Ayça Çirmik, Oya Pamukçu, Özkan Cevdet Özdağ, Tolga Gönenç, Muzaffer Kahveci̇ Jan 2021

12th June 2017 Offshore Karaburun-Lesvos Island Earthquake Coseismic Deformation Analysis Using Continuous Gps And Seismological Data, Hasan Yildiz, Ayça Çirmik, Oya Pamukçu, Özkan Cevdet Özdağ, Tolga Gönenç, Muzaffer Kahveci̇

Turkish Journal of Earth Sciences

Understanding the tectonic mechanism generated by the earthquakes and faults is possible only if the preseismic, coseismic and postseismic crustal deformation related to the earthquakes is determined properly. By the analysis of continuous GPS (CGPS) coordinate time series, it is possible to estimate the crustal deformation. Besides, accelerometer records at strong motion stations (SMSs) may support the CGPS-based estimates. In this study, CGPS coordinate time series were analyzed in comparison with the accelerometer records for clarifying the coseismic deformation caused by the earthquake occurred in the surrounding of Lesvos fault located in the northern part of Karaburun within the active …

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Classification Of Plutonic Rock Types Using Thin Section Images With Deep Transfer Learning, Özlem Polat, Ali̇ Polat, Taner Eki̇ci̇ Jan 2021

Classification Of Plutonic Rock Types Using Thin Section Images With Deep Transfer Learning, Özlem Polat, Ali̇ Polat, Taner Eki̇ci̇

Turkish Journal of Earth Sciences

Classification of rocks is one of the basic parts of geological research and is a difficult task due to the heterogeneous properties of rocks. This process is time consuming and requires sufficiently knowledgeable and experienced specialists in the field of petrography. This paper has a novelty in classifying plutonic rock types for the first time using thin section images; and proposes an approach that uses the deep learning method for automatic classification of 12 types of plutonic rocks. Convolutional neural network based DenseNet121, which is one of the deep learning architectures, is used to extract the features from thin section …

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Tectonic Geomorphology Of The Yatağan Fault (Muğla, Sw Turkey): Implications For Quantifying Vertical Slip Rates Along Active Normal Faults, Mehran Basmenji, Taylan Sançar, Aynur Di̇kbaş, Sarah Jean Boulton, Hüsnü Serdar Akyüz Jan 2021

Tectonic Geomorphology Of The Yatağan Fault (Muğla, Sw Turkey): Implications For Quantifying Vertical Slip Rates Along Active Normal Faults, Mehran Basmenji, Taylan Sançar, Aynur Di̇kbaş, Sarah Jean Boulton, Hüsnü Serdar Akyüz

Turkish Journal of Earth Sciences

South Western Anatolia is dominated by E-W and NW-SE trending active faults. The dip-slip Yatağan Fault is one of these active structures that trends in a NW direction for ~30 km. To assess the relative tectonic activity of the Yatağan Fault, two geomorphic segments were defined along the fault: the FS-1 (northern segment) and the FS-2 (southern segment). The vertical slip rate pattern of the fault was analyzed using steepness indexes, chi (χ) plots, and log-log slope area graphs. Results of the analyses indicate that the steepness of the streams draining the footwall reveal increasingly higher values downstream along the …

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Automated Rhythmic Humanisation As A Structural Marker In Music, Linda Adams, Liam O’Sullivan, Charlie Cullen Jan 2021

Automated Rhythmic Humanisation As A Structural Marker In Music, Linda Adams, Liam O’Sullivan, Charlie Cullen

Research Outputs: 2025-Present

No abstract provided.

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Reassessment Of The Age And Depositional Environment Of The Kırkgeçit Formation Based On Larger Benthic Foraminifera, Nw Elazığ, Eastern Turkey, Sibel Kayğili Jan 2021

Reassessment Of The Age And Depositional Environment Of The Kırkgeçit Formation Based On Larger Benthic Foraminifera, Nw Elazığ, Eastern Turkey, Sibel Kayğili

Turkish Journal of Earth Sciences

The middle-upper Eocene Kırkgeçit Formation, the fossil content of which is the subject of this study, is deposited in a back-arc basin controlled by block-faulting. The Kırkgeçit basin is interpreted as being formed under an extensional regime related to convergence between the Anatolian plate in the north and the Arabian plate in the south. The aim of this study is to reassess the age and depositional environment of the Kırkgeçit Formation by using detailed biometric analysis data obtained from the reticulate Nummulites and determinations of other larger benthic foraminifera (LBF) in the unit. For this purpose, two sections were measured …

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Interpretation Of Magnetic Data Using Boundary Analysis And Inversion Techniques: A Case Study From Gölcük/Isparta (Turkey) Region, Coşkun Sari, Emre Ti̇mur Jan 2021

Interpretation Of Magnetic Data Using Boundary Analysis And Inversion Techniques: A Case Study From Gölcük/Isparta (Turkey) Region, Coşkun Sari, Emre Ti̇mur

Turkish Journal of Earth Sciences

The Gölcük (Isparta) is on the southern side of the city of Isparta in the Mediterranean region of Turkey. The investigation of magnetic field strength variations over subterranean layers may reveal their locations on Earth?s surface and provide physical and geometrical characteristics. Magnetic studies were carried out around Gölcük caldera lake using proton magnetometers to identify subsurface volcanic structures. The acquired data were inverted using four different edge detection algorithms such as analytic signal, tilt angle, theta map, horizontal gradient. Afterwards, the results were used to determine the locations of the anomalous structures. We also used pseudo-gravity and reduction-to-pole techniques …

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Structural Characteristics Of Transtensional Fault System And Its Implication Forhydrocarbon Accumulation In S Block, South Asia Area, Yuwen Dong, Iftikhar Satti, Maman Hermana, Xu Chen Jan 2021

Structural Characteristics Of Transtensional Fault System And Its Implication Forhydrocarbon Accumulation In S Block, South Asia Area, Yuwen Dong, Iftikhar Satti, Maman Hermana, Xu Chen

Turkish Journal of Earth Sciences

Transtensional faults are well developed in the S Block of the South Asia area, which have an important impact on the hydrocarbon accumulation. However, the transtensional fault structure is very complex. Based on drilling and seismic data interpretation results, faults are divided into three typical types in the Lower Cretaceous, which can help to understand the complex fault system. The main faults are distributed in the NNW-SSE direction and parallel arrangement with dextral strike-slip shear characteristics, which determines the development of the tectonic belt. The secondary faults are often associated with the main faults, often composed of multiple branch faults. …

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Quantifying The Bathymetric Stripping Gravity Corrections Of Global Seawater And Majorlakes Over Turkey, Mehmet Si̇mav, Hasan Yildiz Jan 2021

Quantifying The Bathymetric Stripping Gravity Corrections Of Global Seawater And Majorlakes Over Turkey, Mehmet Si̇mav, Hasan Yildiz

Turkish Journal of Earth Sciences

Gravity data inversion or interpretation requires the removal of the gravitational effects of the a priori known geologic and/or morphologic features within the Earth?s system to model and reveal the remaining signals of the unknown anomalous subsurface density distributions. The Bouguer gravity anomalies reduced by the normal gravitational field of the Earth and the gravitational attraction of the topographic masses above the sea level are frequently used in geophysics for this purpose. However, density contrast effects of the other major known elements, such as offshore seawater, inland water bodies, glaciers, and/or sediments can be removed from the Bouguer gravity anomalies, …

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Cover And Contents Jan 2021

Cover And Contents

Turkish Journal of Earth Sciences

No abstract provided.

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