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Articles 1021 - 1050 of 10317
Full-Text Articles in Physical Sciences and Mathematics
Late Ediacaran Inertial-Interchange True Polar Wander (Iitpw) Event: A New Road To Reconcile The Enigmatic Paleogeography Prior To The Final Assembly Of Gondwana, Bin Wen, Cairong Luo, Yong-Xiang Li, Yanting Lin
Late Ediacaran Inertial-Interchange True Polar Wander (Iitpw) Event: A New Road To Reconcile The Enigmatic Paleogeography Prior To The Final Assembly Of Gondwana, Bin Wen, Cairong Luo, Yong-Xiang Li, Yanting Lin
Turkish Journal of Earth Sciences
The Ediacaran to Early Cambrian plate tectonics was dominated by a full dispersal of the supercontinent Rodinia and the subsequent amalgamation of Gondwana. There is a consensus that the final assembly of Gondwana was not completed until the Early Cambrian. Prior to the final assembly, however, one major uncertainty remains on the quantitative paleogeography: the mainland of Gondwana was plausibly positioned at either a high or low latitude at a single time instant to meet the dual-latitude ('high-latitude' and 'low-latitude') options of Laurentia and the requirement of
A Preliminary Account On Devonian Trilobites From Arabian Plate, Se Turkey, Catherine Cronier, İzzet Hoşgör
A Preliminary Account On Devonian Trilobites From Arabian Plate, Se Turkey, Catherine Cronier, İzzet Hoşgör
Turkish Journal of Earth Sciences
Recently, several Devonian localities and the related biota occurring from the southeastern Turkey were reinvestigated. Although, the Hakkari-Çukurca and the Diyarbakır-Hazro areas of the Arabian Plate are considered as an important source of the Devonian macrofossils from the north Arabian sector of Gondwana, the existing record of Devonian trilobites in these regions was hitherto unknown. We here report and illustrate for the first time Lower and Middle Devonian trilobites represented by three proetid pygidia and one calymenid pygidium. The morphological features of these pygidia suggest that they can be assigned to undetermined species of Gravicalymene (Calymenidae) and Podoliproetus (Proetidae), two …
Devonian Parathuramminids From Taurides, Southern Turkey, Recep Özkan
Devonian Parathuramminids From Taurides, Southern Turkey, Recep Özkan
Turkish Journal of Earth Sciences
Devonian shallow marine carbonate rocks of the Taurides (southern Turkey) host rich and diverse faunal assemblages of foraminifera including unilocular organisms of the family Parathuramminidae. This study allowed investigating the calcareous unilocular parathuramminid fauna obtained from three measured stratigraphic sections Halevikdere, Kocadere and Eceli in addition to one detailed, shorter section measured along the Halevikdere section. The investigation revealed that the parathuramminid species, which commonly occur in lagoonal environments, are widely distributed throughout the studied sections. They mostly exist in limestone beds deposited in a time interval from Middle Devonian (Eifelian) to Late Devonian (Frasnian). However, their richness and diversity …
Tectonomagmatic Reconstruction Of The Upper Mesozoic-Cenozoic Neotethyan Arcs In The Lut Block, East Iran: A Review And Synthesis, Reza Arjmandzadeh, Saeed Alirezaei, Alireza Almasi
Tectonomagmatic Reconstruction Of The Upper Mesozoic-Cenozoic Neotethyan Arcs In The Lut Block, East Iran: A Review And Synthesis, Reza Arjmandzadeh, Saeed Alirezaei, Alireza Almasi
Turkish Journal of Earth Sciences
The Lut Block in east Iran with a widespread record of arc-type Mesozoic-Cenozoic magmatic rocks is bordered by the Birjand (Sistan) ophiolitic assemblage to the east and the Sabzevar ophiolitic assemblage to the north. The nature and tectonomagmatic setting of these sutures and associated arcs are controversial. The geochemical attributes of the Upper Cretaceous-Paleogene intrusive and extrusive rocks in the central (CLB) and the northern Lut block (NLB) and in the Sabzevar ophiolite zone (SOZ), Late Cretaceous calc-alkaline and adakitic rocks to the east of the Sistan suture (CAS), and the Bazman intrusives to the west are consistent with a …
A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva
A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva
Turkish Journal of Earth Sciences
Lake Kaindy, which is located in the Kazakhstan side of the Tien Shan Mountains is one of the most famous places in the World due to having sunken Picea schrenkiana Fisch. & C.A.Mey. trees within the Lake. The purpose of the study is to find the dead years of the sunken trees in the lake and therefore to confirm the formation time of Kaindy Lake, and if there is an effect of the 1911 Kemin earthquake on the tree-ring width of Picea schrenkiana around the lake. Eight wood pieces and two increment cores from the sunken trees were taken to …
Vertical Variations Of Minerals In Clayey Sedimentary Rocks In The Cores Of Two-Deep Exploration Wells From The Kozlu Coalfield (Zonguldak, Nw Türkiye), With Emphasis On Tonstein (Schieferton) Formation, Ali̇ İhsan Karayi̇ği̇t, Emi̇ne Sütcü, Abi̇di̇n Temel, Mustafa Ni̇yazi̇ Gündoğdu
Vertical Variations Of Minerals In Clayey Sedimentary Rocks In The Cores Of Two-Deep Exploration Wells From The Kozlu Coalfield (Zonguldak, Nw Türkiye), With Emphasis On Tonstein (Schieferton) Formation, Ali̇ İhsan Karayi̇ği̇t, Emi̇ne Sütcü, Abi̇di̇n Temel, Mustafa Ni̇yazi̇ Gündoğdu
Turkish Journal of Earth Sciences
The majority of Turkish bituminous coal resources are located in the Zonguldak Basin. The Carboniferous coal seams in the Alacaağzı, Kozlu, and Karadon formations have received interest. However, the detailed mineralogical compositions of clayey sedimentary rocks in coal-bearing sequences in the basin have been limited. This study aims to investigate vertical variations of mineralogical compositions of Carboniferous and Early Cretaceous clayey sedimentary rocks cored in the two-deep exploration wells (K20/K and K20/H) from the Kozlu coalfield using XRD and SEM-EDX analyses data. In addition, a special interest is also given to tonstein layers identified within the Kozlu and Karadon formations. …
Structural Interpretation And Petrophysical Approach For Subsurface Fractureidentification Of Joya Mair Area, Nw-Himalayas, Pakistan, Palwasha Shahzad Rathore, Muhammad Armaghan Faisal Miraj, Muhammad Bilal Malik, Sher Afgan, Rana Faizan Saleem, Shan Shahzad, Irza Akhtar
Structural Interpretation And Petrophysical Approach For Subsurface Fractureidentification Of Joya Mair Area, Nw-Himalayas, Pakistan, Palwasha Shahzad Rathore, Muhammad Armaghan Faisal Miraj, Muhammad Bilal Malik, Sher Afgan, Rana Faizan Saleem, Shan Shahzad, Irza Akhtar
Turkish Journal of Earth Sciences
Identification of fracture zone is a challenging task without the image log data. There are many brownfields around the world where the image log has not been acquired; therefore, there must be an alternative way of fracture identification. In this paper, a conventional log response technique for fracture delineation has been discussed. The study area lies in the Upper Indus Basin of Pakistan, which is sub-divided into the Kohat and Potwar basins. Minwal-X-1 of Joya Mair area, which lies in the Potwar Basin, is selected for this purpose. Eocene limestone units are formed due to fracture porosity. The objective of …
Growth Of The Imbrication Zone Along The Southeast Anatolian Orogenic Belt: Evidencefrom Fission Track Thermochronology From Gölbaşı Region (Se Turkey), Yusuf Topak
Turkish Journal of Earth Sciences
One of the major components of continental collision zones is their imbricated zones. Such a zone along the Southeast Anatolian Orogenic Belt (SAOB) is solely controlled by a still-active convergence and accretion system between the Anatolian Plate and Arabian platform since at least Late Cretaceous. The zone is characterized by NEE/SWW-trending, northward-dipping thrust slices that are squeezed between the Tauride Block to the north and the Arabian platform to the south. The units cropping out within the zone comprise Neo-Tethysrelated magmatic, ophiolitic, sedimentary and metamorphic rocks with Late Cretaceous to Miocene formation/metamorphism ages. The Karanlıkdere granitoid intrudes into Late Cretaceous …
The Active Fault Pattern Based On Morphotectonic And Structural Data In The South Ofulubat Lake And The Susurluk Valley Along The Southern Branch Of North Anatolian Faultzone: A Criticism Of The Bend Model In Northwest Anatolia, Gürol Seyi̇toğlu, Korhan Esat
The Active Fault Pattern Based On Morphotectonic And Structural Data In The South Ofulubat Lake And The Susurluk Valley Along The Southern Branch Of North Anatolian Faultzone: A Criticism Of The Bend Model In Northwest Anatolia, Gürol Seyi̇toğlu, Korhan Esat
Turkish Journal of Earth Sciences
Field observations and morphotectonic evaluations on the south of Ulubat Lake and the Susurluk valley show that the dominant active fault pattern consists of northeast-southwest and east northeast-west southwest right-lateral faults and northwestsoutheast normal faults developing between these strike-slip faults. We redefined the active faults in the south of Ulubat Lake and discovered that these northeast-southwest right-lateral faults control the route of Susurluk River. Based on these discoveries and evaluations, we can claim that the "bend model" previously proposed for the region is not valid, as seen in the Mustafakemalpaşa Fault and Balıkesir-Kepsut Fault examples. Instead, we suggest that the …
Mineralogical, Petrological, And Geochemical Characteristics Of Şenkaya Chrysoprase,Turkey, Hami̇t Haluk Seli̇m, Aykut Güçteki̇n, Ferhan Şahi̇n, Mustafa Kaya, Beri̇l Kaya, Elanur Güner, Kami̇l Ömer Taş, Ahmet Karakaş, Yasemi̇n Kantarçeken
Mineralogical, Petrological, And Geochemical Characteristics Of Şenkaya Chrysoprase,Turkey, Hami̇t Haluk Seli̇m, Aykut Güçteki̇n, Ferhan Şahi̇n, Mustafa Kaya, Beri̇l Kaya, Elanur Güner, Kami̇l Ömer Taş, Ahmet Karakaş, Yasemi̇n Kantarçeken
Turkish Journal of Earth Sciences
Şenkaya chrysoprase is a gemstone and can be found near the Turnalı village located in the west-northwest of Şenkaya (Erzurum) county in the uplifted Kırdağ of Northeast Anatolia of Turkey. Chrysoprase only found in Şenkaya County and known with the same name commercially in Turkey is a light-dark green and cryptocrystalline structure gemstone encountered in the Örükyayla Mélange. Samples were collected from the field for defining mineralogical-petrographical, XRD, XRF, ICP-MS, optical cathodoluminescence microscopy (OCLM), FTIR-Raman and stable isotopic properties of Şenkaya chrysoprase. According to mineralogical and petrographic examination, Şenkaya chrysoprase has generally heterogeneous color distribution in macroscale and has 5 …
Skill Assessment Of A High Resolution (1/72 Degree) Black Sea Ocean Model, Bi̇lge Tutak
Skill Assessment Of A High Resolution (1/72 Degree) Black Sea Ocean Model, Bi̇lge Tutak
Turkish Journal of Earth Sciences
The skill of a high-resolution Black Sea circulation model (ROMS) is assessed using the available satellite and field data for Sea Surface Height Anomaly (SSHA), Sea Surface Temperature, and CTD profiles. The model is configured to simulate the 9-year period between 2012 and 2021. The model's skill is assessed using standard analytical methods for error calculation such as Root Mean Square Error (RMSE) and correlation. Additionally, the model results are assessed using several more recent methods such as the relative operating characteristic (ROC). The results show that the model is capable of simulating daily mean SSHA with an RMSE value …
Further Contribution To The Early Miocene Woody Flora Of Galatian Volcanic Provincefrom Doğanyurt Village, Ankara (Turkey), Ünal Akkemi̇k, Stanila Iamandei, Hakan Çeli̇k
Further Contribution To The Early Miocene Woody Flora Of Galatian Volcanic Provincefrom Doğanyurt Village, Ankara (Turkey), Ünal Akkemi̇k, Stanila Iamandei, Hakan Çeli̇k
Turkish Journal of Earth Sciences
The Galatian Volcanic Province (GVP) located in central-north Anatolia had a rich woody flora. The purpose of the present study is to contribute to the early Miocene woody flora of the GVP from two fossil sites from Doğanyurt Village of the city of Beypazarı in the Province of Ankara. The fossil sites, which are near to each other, have small pieces of fossil woods. Total 16 fossil woods were collected from two neighbour sites. Three thin sections as transversal, tangential and radial sections from each sample were taken, and they were identified microscopically. As a result, ten fossil species were …
Stratigraphic Correlation Of The Givetian (Late Middle Devonian) Deposits In Qujing,Yunnan, Southwestern China And The Paleogeographic Implications, Jianhua Wang, Yunchuan Mi, Xiaorou Ma, Yukun Bi
Stratigraphic Correlation Of The Givetian (Late Middle Devonian) Deposits In Qujing,Yunnan, Southwestern China And The Paleogeographic Implications, Jianhua Wang, Yunchuan Mi, Xiaorou Ma, Yukun Bi
Turkish Journal of Earth Sciences
Detailed description of spatio-temporal framework of fossil-bearing strata is of fundamental significance for understanding the evolution of organisms and regional tectonics. The Qujing and Haikou formations are two lithological units exposed in eastern Yunnan, southwestern China, and both bear rich fossils indicative of a Middle Devonian age, while their relationship or lateral correlation remains unclear. Based on detailed observations of outcrops of these two formations in Qujing, eastern Yunnan, and as well as their typical rock characteristics and fossil contents, we propose that the two formations are basically contemporaneous heterotopic facies. From north to south of the Qujing area, the …
Geochemical And Petrographic Approach For The Origin Of The Limestone Blocks Of Thewalls Of The Great Temple Of Hattusha, Çorum (N-Turkey), İsmai̇l Ömer Yilmaz, Andreas Schachner, İbrahi̇m Tonguç Uysal, Ezgi̇ Ünal İmer
Geochemical And Petrographic Approach For The Origin Of The Limestone Blocks Of Thewalls Of The Great Temple Of Hattusha, Çorum (N-Turkey), İsmai̇l Ömer Yilmaz, Andreas Schachner, İbrahi̇m Tonguç Uysal, Ezgi̇ Ünal İmer
Turkish Journal of Earth Sciences
The socle stones of the Great Temple in the Lower City of the Hittite capital city, Hattusha (Çorum Province) have been studied for the first time by petrographic and geochemical analysis (Sr isotope, stable isotope, and trace element geochemistry). Study objectives were to determine the carbonate facies of the stone samples used in the Great Temple and investigate their possible sources. Petrographic analysis of 10 limestone samples presents five clusters of different microfacies. Stable isotope (δ13C and δ18O) analysis displayed the presence of 5 groups in parallel with petrographic analysis. Trace element analysis of the same groups displayed considerable difference …
Petrology, Geochemistry, And Geodynamic Implications Of The Ediacaran Volcanism Of The Southwestern Edge Of The Saghro Massif (Eastern Anti-Atlas, Morocco), Rachid Zahour, Ghalem Zahour, Hassan El Hadi, Youssef Zerhouni, Zouhair Baroudi, Mounia Khoukhouchi
Petrology, Geochemistry, And Geodynamic Implications Of The Ediacaran Volcanism Of The Southwestern Edge Of The Saghro Massif (Eastern Anti-Atlas, Morocco), Rachid Zahour, Ghalem Zahour, Hassan El Hadi, Youssef Zerhouni, Zouhair Baroudi, Mounia Khoukhouchi
Turkish Journal of Earth Sciences
The southwestern edge of the Saghro Massif experienced during the Ediacaran period an intense volcanic activity represented by basaltic andesites and acid rocks with ignimbritic dominance. The chemical characteristics of these rocks correspond to those of calc-alkaline orogenic magmatism related to a subduction zone. The genesis of these two rock groups does not seem to be controlled by the fractional crystallization process as a factor controlling their evolution. Partial melting of a lithospheric mantle still influenced by the Pan-African orogeny and a contaminated constituent of the lower continental crust is a likely source of the basaltic andesites. Ignimbrites represent the …
A History Of Pistacia Lentiscus And Pinus Brutia Trees And Their Ecological Changes In The Güllük Bay (Muğla, Sw Turkey) During The Last 400 Years, Demet Bi̇lteki̇n, Georg Schwamborn, Kürşad Kadi̇r Eri̇ş, Dursun Acar, Bi̇kem Ekberzade, Zahra Hashemi̇, Nuretti̇n Yakupoğlu, Ali̇ Mohammadi̇, Ömer Yetemen
A History Of Pistacia Lentiscus And Pinus Brutia Trees And Their Ecological Changes In The Güllük Bay (Muğla, Sw Turkey) During The Last 400 Years, Demet Bi̇lteki̇n, Georg Schwamborn, Kürşad Kadi̇r Eri̇ş, Dursun Acar, Bi̇kem Ekberzade, Zahra Hashemi̇, Nuretti̇n Yakupoğlu, Ali̇ Mohammadi̇, Ömer Yetemen
Turkish Journal of Earth Sciences
In this study, we present pollen records together with a multiproxy analysis from a sediment core collected from the Güllük Bay (Bargilya Cove, Muğla, SW Turkey), covering the last 400 years. Pistachio shrubland was occupying around the Güllük Bay between 1613 and 1741 AD. However, after 1741 AD, the vegetation canopy suddenly changed and Turkish pine (Pinus brutia) was established. This supports that the main factor affecting the expansion of Pistacia lentiscus was precipitation rather than temperature after 1741 AD. This change is also indicated by high Sr-Ca values, reflecting arid conditions. Two anthropogenic phases developed in the region. The …
Sedimentary Records Of Trace Elements Contamination In Sediment Core From The Gulf Of Gemlik, Marmara Sea, Turkey: History, Contamination Degree, And Sources, Tuğçe Nagi̇han Arslan Kaya, Erol Sari, Mehmet Ali̇ Kurt
Sedimentary Records Of Trace Elements Contamination In Sediment Core From The Gulf Of Gemlik, Marmara Sea, Turkey: History, Contamination Degree, And Sources, Tuğçe Nagi̇han Arslan Kaya, Erol Sari, Mehmet Ali̇ Kurt
Turkish Journal of Earth Sciences
The pollution history of aluminum (Al), chromium (Cr), cobalt (Co), lead (Pb), zinc (Zn), copper (Cu), and mercury (Hg) were evaluated using geochemical and sedimentological properties of two sediment cores. The MD22A contained a mass-flow unit and two coccolith units. The upper coccolith was characterized by high organic matter, but it was relatively depleted in terms of all studied elements, suggesting dilution by high inorganic carbon. In the mass-flow unit, the relatively high Cr, Co, Zn, and Hg levels suggested additional contamination sources from the Kocadere Stream and Kocasu River. The ranges of Al, Cr, Co, Cu, Hg, Pb, and …
Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo
Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo
Turkish Journal of Earth Sciences
The Nakamura method, known as horizontal to vertical spectral ratio (HVSR), has been used to analyze site effect assessment. Over the past decade, various HVSR curve inversion methods for near-surface geophysical surveys have been developed. Particle swarm optimization (PSO) inversion method has been applied to solve the HVSR inversion curve to estimate the shear wave velocity (Vs) value towards the depth. In this study, the HVSR curve inversion experiment has been applied with two synthetic data: noise-free data and the other is contaminated by 10% random noise. This research aims to find out how the PSO algorithm performs to find …
Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan
Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan
Turkish Journal of Earth Sciences
Red soils as the weathering products in Muğla Polje (SW Turkey) show different occurrences either on hard and permeable limestone (terra rossa (TRs)) or within the matrix of transported sediments (alluvium-derived soils (ALs), alluvium-derived soils specifically from clastics (ALsc), paleosol (Pls), and colluvium-derived soils (CLs)). The purpose of this study is to unlock the effect of weathering on hard carbonate rocks and dynamic young land surfaces (alluvium and colluvium) in Muğla Polje for the first time in terms of mineralogical and geochemical compositions. TRs, the soils of more stable environments are clayey while ALs and CLs as being the soils …
Production Of Nimn2o4 Hollow Spheres And Cofe2o4 Bowl-Like Structures By Using Block Copolymer Stabilized Polystyrene Spheres As A Hard Template, Gökhan Koçak, Vural Bütün
Production Of Nimn2o4 Hollow Spheres And Cofe2o4 Bowl-Like Structures By Using Block Copolymer Stabilized Polystyrene Spheres As A Hard Template, Gökhan Koçak, Vural Bütün
Turkish Journal of Chemistry
The aim of this study is to highlight the use of polystyrene (PS) latexes stabilized with block copolymers as a hard template in the production of metal oxide hollow spheres. PS latexes produced by dispersion polymerization by stabilizing with tertiary amine methacrylate-based diblock copolymer were used as a hard template in the preparation of nickel manganese oxide (NiMn2O4) hollow spheres and cobalt iron oxide (CoFe2O4) bowl-like structures. Thanks to the diblock copolymer stabilizer with tertiary amine functional groups on the PS surface, precursor salts of CoFe2O4 and NiMn2O4 were first homogeneously deposited on the surface of PS latexes with a …
The Study Of Fe3o4@Sio2-Nh2 Nano-Magnetic Composite Modified By Glutaraldehyde To Immobilized Penicillin G Acylase, Monier Alhadi Abdelrahman Mohammed, Zhenbin Chen, Ke Li, Boyuan Zhang
The Study Of Fe3o4@Sio2-Nh2 Nano-Magnetic Composite Modified By Glutaraldehyde To Immobilized Penicillin G Acylase, Monier Alhadi Abdelrahman Mohammed, Zhenbin Chen, Ke Li, Boyuan Zhang
Turkish Journal of Chemistry
Preparation of biocatalyst dependent on immobilized penicillin G acylase (PGA) was of substantial importance for proteomic research, organic synthesis, and industrial applications. Herein, we developed an easy method for nano-magnetic composite to immobilize PGA. Fe3O4 nano-magnetic particles were co-precipitated with Fe3+ and Fe2+ in an ammonia solution (NH3) and treated with silicon dioxide (SiO2), which was developed using the sol-gel process. Thereafter, 3-aminopropyltriethoxysilane (APTES) was used to modify the silica-coated Fe3O4, which would result in the attachment of the primary amine groups to the particle surface. After that, the attachment of primary amine group was reacted with glutaraldehyde (Glu) to …
Synthesis, Molecular Modeling, And Biological Evaluation Of Novel Imatinib Derivatives Asanticancer Agents, Fulya Günay, Sevcan Balta, Yuk Yin Ng, Özlem Ulucan Açan, Zühal Turgut, Ömer Tahi̇r Günkara
Synthesis, Molecular Modeling, And Biological Evaluation Of Novel Imatinib Derivatives Asanticancer Agents, Fulya Günay, Sevcan Balta, Yuk Yin Ng, Özlem Ulucan Açan, Zühal Turgut, Ömer Tahi̇r Günkara
Turkish Journal of Chemistry
Different derivatives of imatinib were synthesized by a 3-step reaction method. The structures of the new compounds were characterized by spectroscopic methods. For quantitative evaluation of the biological activity of the compounds, MTT assays were performed, where four BCR-ABL negative leukemic cell lines (Jurkat, Reh, Nalm-6 and Molt-4), one BCR-ABL positive cell line (K562), and one non-leukemic cell line (Hek293T) were incubated with various concentrations of the derivatives. Although imatinib was specifically designed for the BCR-ABL protein, our results showed that it was also effective on BCR-ABL negative cell lines except for Reh cell line. Compound 9 showed lowest IC50 …
Effect Of Poly(Ethylene-Vinyl Acetate) Pour Point Depressant On The Cold Flow Properties And Crystallization Behavior Of Soybean Biodiesel Blends Fuel, Jinbao Liu, Chunhua Wang, Qian Liu, Fen Zhang, Xiaojie Liu, Min Sun
Effect Of Poly(Ethylene-Vinyl Acetate) Pour Point Depressant On The Cold Flow Properties And Crystallization Behavior Of Soybean Biodiesel Blends Fuel, Jinbao Liu, Chunhua Wang, Qian Liu, Fen Zhang, Xiaojie Liu, Min Sun
Turkish Journal of Chemistry
Although biodiesel-diesel blends are being widely used in diesel engines, investigations on its cold flow properties and crystallization behavior are still scarce. In this paper, poly(ethylene-vinyl acetate) (PEVA) pour point depressant and petroleum diesel were worked together to enhance the cold flow properties of soybean biodiesel. PEVA presented a better positive effect in reducing the cold filter plugging point (CFPP) of biodiesel blends. B40 treated with 1% PEVA exerted the best cold flow properties, and its CFPP was decreased by -14 °C. In addition, the crystallization behavior was changed variously. The sizes of crystals were decreased as well as the …
A Simple And Rapid Rp-Hplc Method For The Assessment Of Cobalamin (Vitamin B12) Intilapia And Snoek Fishes, Labaran Ibrahim, Aminu Usman
A Simple And Rapid Rp-Hplc Method For The Assessment Of Cobalamin (Vitamin B12) Intilapia And Snoek Fishes, Labaran Ibrahim, Aminu Usman
Turkish Journal of Chemistry
This study developed a rapid reversed-phase high-performance liquid chromatography (RP-HPLC) method equipped with a UV-Vis detector. The aquaponics system?s tilapia and marine snoek fishes were extracted using an autoclaving process and enzymatic treatment. The technique enabled the separation and quantification of cobalamin present in these fishes extracts. Phenomenex Luna® 5 μm C18 (2) 100 A LC-column (150 × 4.6 mm) was used as a stationary phase, while the mobile phase consisted of methanol and phosphoric acid in a ratio of 35:65 (v/v), respectively. The developed method was revealed to be rapid (a retention time of less than 5.0 min), linear …
Clerodendrum Serratum Extract Attenuates Production Of Inflammatory Mediators Inovalbumin-Induced Asthma In Rats, Poonam Arora, Shahid Hamid Ansari, Lalit Mohan Nainwal
Clerodendrum Serratum Extract Attenuates Production Of Inflammatory Mediators Inovalbumin-Induced Asthma In Rats, Poonam Arora, Shahid Hamid Ansari, Lalit Mohan Nainwal
Turkish Journal of Chemistry
In the present study, ethanolic extract of Clerodendrum serratum roots was investigated for its potential to reverse some features of bronchial asthma in ovalbumin-induced murine model of asthma. Clerodendrum serratum commonly called bharangi, (family Solanaceae) is a well-known anti-allergic drug in Asian folk system of medicines. In the present work, pharmacological studies are done to provide scientific evidence for therapeutic potential of plant in allergic asthma. Asthma was induced in experimental rats with allergen suspension of ovalbumin and aluminum hydroxide followed by treatment with dexamethasone (2.5 mg/kg, po) or C. serratum root extract (0.53 and 5.3 mg/kg, b. w., po). …
Comparison Of Volatile Chemical Components Of Cystoseira Crinita Duby By Hydrodistillation(Hd) And Solid-Phase Microextraction (Spme) Methods And Antimicrobialand Scolicidal Activities Of Essential Oil And Extracts, Tayyi̇be Beyza Yücel
Turkish Journal of Chemistry
This study aims to derive an essential oil from Cystoseira crinita Duby, analyze the chemical composition of the essential oil, discover the antimicrobial activities of the oil and the extracts, and investigate the scolicidal activities of the extracts. The volatile organic compounds of Cystoseira crinita Duby were determined by GC/MS-FID using both hydro-distillation (HD) and solid-phase microextraction (SPME) methods. As a result of the essential oil analysis, 97.14% of 17 compounds and 93.13% of 19 compounds were elucidated. The main compounds identified were hexanal (31.802%), n-hexadecanoic acid (12.654%), trans-β-ionone (9.118%), 2E-hexenal (15.955%), heptadecane (15.729%) and tetradecane (13.458%). In addition, hexane, …
Momentum Of Light In Complex Media, Yuri Obukhov
Momentum Of Light In Complex Media, Yuri Obukhov
Turkish Journal of Physics
An important issue in phenomenological macroscopic electrodynamics of moving media is the definition of the energy and momentum of the electromagnetic field in matter. Rather surprisingly, this topic has demonstrated a remarkable longevity, and the problem of the electromagnetic energy and momentum in matter remained open, despite numerous theoretical and experimental investigations. We overview the definition of the momentum of light in matter and demonstrate that, for the correct understanding of the problem, one needs to carefully distinguish situations when the material medium is modeled either as a background for light or as a dynamical part of the total system. …
Investigating The Potential Of Laser-Written One-Dimensional Photonic Crystals Inside Silicon, Onur Tokel
Investigating The Potential Of Laser-Written One-Dimensional Photonic Crystals Inside Silicon, Onur Tokel
Turkish Journal of Physics
The field of silicon photonics is based on introducing and exploiting advanced optical functionality. Current efforts in the field are based on conventional micro/nanofabrication methods, leading to optical functionality over wafer surfaces. A complementary and emerging field is introducing analogous optics directly within the wafer using lasers. Here we investigate the theoretical feasibility of a subclass of such optics, photonic crystals. Our efforts will guide future experimental efforts towards in-chip spectral control.
On An Econophysics Model, Miron Kaufman
On An Econophysics Model, Miron Kaufman
Turkish Journal of Physics
Krugman has proposed a continuous in time and space model for the emergence of polycentric urban areas in the regional space. By using a discrete version of this model on spatial networks, we predicted the distribution of jobs among the different localities inside a couple of economic regions in Ohio and Texas. The time evolution of the distribution of jobs is governed by a market potential. Employment gradually moves towards locations considered relatively attractive if their market potential is above the spatial average. Similarly, jobs move away from locations with below-average market potential. First, I will show that the market …
Geodesics Of Fiberwise Cigar Soliton Deformation Of The Sasaki Metric, Liana Lotarets
Geodesics Of Fiberwise Cigar Soliton Deformation Of The Sasaki Metric, Liana Lotarets
Turkish Journal of Mathematics
Ricci solitons arose in proof the Poincare conjecture by R. Hamilton and G. Perelman. The first example of a noncompact steady Ricci soliton on a plane was found by R. Hamilton. This two-dimensional manifold is conformally equivalent to the plane and it is called by R. Hamilton's cigar soliton. The cigar soliton metric can be considered as a fiber-wise conformal deformation of the Euclidean metric on a fiber of the tangent bundle. In the paper we propose a deformation of the classical Sasaki metric on the tangent bundle of an n-dimensional Riemannian manifold that induces the cigar soliton type metric …