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Articles 14071 - 14100 of 15024
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Biostratigraphic And Environmental Analysis Of The Upper Jurassic- Lower Cretaceous Carbonate Sequence In The Başoba Yayla Area (Trabzon, Ne Turkey), Kemal Tasli, Erol Özer, Cemi̇l Yilmaz
Biostratigraphic And Environmental Analysis Of The Upper Jurassic- Lower Cretaceous Carbonate Sequence In The Başoba Yayla Area (Trabzon, Ne Turkey), Kemal Tasli, Erol Özer, Cemi̇l Yilmaz
Turkish Journal of Earth Sciences
In the Başoba Yayla (Trabzon, NE Turkey) area, which is located in the Eastern Pontides northern zone, platform carbonates were deposited during the Late Jurassic-Early Cretaceous time in environments varying from intertidal/ supratidal to outer shelf. The carbonate sequence begins with a thick dolomite unit of the Late Jurassic to Early Cretaceous age. The following unit is rich in benthic foraminifers and pelecypoda shells. The foraminiferal assemblage comprising Vercorsella laurentii/camposaurii and Pseudolituonella gavonensis indicates a Late Hauterivian to Early Aptian age for this unit. The Late Aptian-Albian facies is characterized by bioclastic wackestones containing benthic foraminifers typical of outer platform …
Deformation Of Stibnites And Pyrites In The Madsan Antimony Deposit (Niğde, Turkey): Implications For Pressure-Temperatureconditions Of Local Deformation, İlkay Kuşcu, Ayhan Erler
Deformation Of Stibnites And Pyrites In The Madsan Antimony Deposit (Niğde, Turkey): Implications For Pressure-Temperatureconditions Of Local Deformation, İlkay Kuşcu, Ayhan Erler
Turkish Journal of Earth Sciences
The Madsan antimony deposit at the southeastern part of the Niğde province (south-central Turkey) includes a series of epithermal veins hosted by marbles and gneisses. The veins have a simple mineralogy of quartz, calcite, stibnite and pyrite as major constituents, and cinnabar occurs in trace amounts. The deposit experienced a progressive deformation evidenced by a set of textures developed especially in stibnite and pyrite. These are pressure lamellae and annealing as the main textures, and curvature, off-set of pressure lamellae and fracture filling as the textures of minor importance. These were developed in three successive deformation phases. Pressure lamellae represent …
Diurnal Variation Of Water Chemistry Andzooplankton In Little Mere, Cheshire, Uk, In 1993 And 1994, Meryem Bekli̇oğlu, Brian Moss
Diurnal Variation Of Water Chemistry Andzooplankton In Little Mere, Cheshire, Uk, In 1993 And 1994, Meryem Bekli̇oğlu, Brian Moss
Turkish Journal of Zoology
In Little Mere, diurnal sampling of the zooplankton at three different habitats in 1993 provided little evidence to support the data of Timms and Moss (10) that cladocerans move out from refugia at night to graze in open water. The floating-leaved water lily, appeared to be more efficient at providing refuge to D. hyalina in the presence of high planktivore fish predation than the submerged plant beds and the open water. This might be due to unfavourable physical and chemical environmental conditions associated with the water lily bed for fish feeding, a possibility supported by the findings of very low …
Some Biological Characteristics Of Artemia Salina (L., 1758) In Tuz Lake, Yasemi̇n Başbuğ
Some Biological Characteristics Of Artemia Salina (L., 1758) In Tuz Lake, Yasemi̇n Başbuğ
Turkish Journal of Zoology
In this study, the periodic changes in density and population structure, the generation number, reproduction characteristic and reproduction period of Artemia salina (L., 1758) living in Tuz Lake in 1995 have been investigated. Some physical parameters of lake water at the certain stations have been determined. It has been observed that A. salina is distributed near the coastline of 10 kilometers between the stations Devekonağı and Çalören in the east side of Tuz Lake. Its reproduction period was between April-July and A. salina population consisted two generation in 1995. It has been detected that A. salina population in Tuz Lake …
Mafic Microgranular Enclaves In The Kozak Granodiorite, Western Anatolia, Cüneyt Akal, Cahi̇t Helvaci
Mafic Microgranular Enclaves In The Kozak Granodiorite, Western Anatolia, Cüneyt Akal, Cahi̇t Helvaci
Turkish Journal of Earth Sciences
Enclaves which are relicts of initial basic magma give important information on the origin and evolution of granitic magmas. The mafic microgranular enclaves from the l-type Kozak pluton are less than 1 m that are located at the margin of pluton and mostly less than 15 cm and are generally in sharp contact with the surrounding granodiorite. In some cases, several enclaves may occur close to each other, but they are not closely clustered to form swarms. Most of the enclaves are ellipsoidal in shape. The largest enclaves are less ellipsoidal with curved boundaries. The mafic microgranular enclaves contain same …
Rock-Forming Nannofossils In Uppermost Jurassic-Lowercretaceous Rock Units Of Northwest Anatolia: Nannoconusand Its Resived Taxonomy, Sevi̇nç Özkan Altiner
Rock-Forming Nannofossils In Uppermost Jurassic-Lowercretaceous Rock Units Of Northwest Anatolia: Nannoconusand Its Resived Taxonomy, Sevi̇nç Özkan Altiner
Turkish Journal of Earth Sciences
Nannoconids have been recorded in a rock-forming quantity in the uppermost Jurassic-Lower Cretaceous rock units in Northwest Anatolia, Turkey. Samples were collected from seventeen stratigraphic sections spanning the calciturbidities of the Yosunlukbayiri Formation and pelagic micrites of the Sogukçam Limestone. Because of rareness and difficulties for extracting of calcareous nannofossil species particularly zone markers in these type lithologies, nannoconids have particular attention in terms of biostratigraphy. Twenty nine species of nannoconids were recorded in the studied samples. Their taxonomy were revised and their stratigraphic ranges were given. The classification of genus Nannoconusis based on the gross morphology of the test, …
Geology Of The Dereiçi (Şavsat, Artvin) Cu-Pb-Zn Deposits, Mesut Soylu, Ayhan Erler
Geology Of The Dereiçi (Şavsat, Artvin) Cu-Pb-Zn Deposits, Mesut Soylu, Ayhan Erler
Turkish Journal of Earth Sciences
The geological relationships between the rock units in the Dereiçi/Şavsat (Artvin) region and vein-type Cu-Pb-Zn deposits were presented in this paper. The study area comprises the Upper Cretaceous intermediate volcanic rocks and sedimentary rocks, with Post-Eocene dykes of andesitic and diabasic composition. The mineral deposits are classified as (1) Sphalerite-Galena-Chalcopyrite-Pyrite veins (Talatin Madeni, Binektasi and Fikrinin Madeni), (2) milky quartz-Chalcopyrite-Sphalerite-Galena-Pyrite veins and (3) Chalcopyrite-Pyrite veins. The general paragenetic sequence of the mineralizations is observed as quartz I-pyrite-chalcopyrite-sphalerite-galena-quartz II-chalcocite-covellite. The wall rocks are subjected to silicification, sericitic alteration, chloritization and carbonatization.
Along-Strike Discontinuity Of Active Normal Faults And Its Influence On Quaternary Travertine Deposition; Examples From Western Turkey, Zi̇yadi̇n Çakir
Along-Strike Discontinuity Of Active Normal Faults And Its Influence On Quaternary Travertine Deposition; Examples From Western Turkey, Zi̇yadi̇n Çakir
Turkish Journal of Earth Sciences
Detail mapping of active fault zones bounding four travertine masses in the Gediz and Menderes grabens of western Turkey revealed that they are divided into geometric fault segments up to 13 km long. Fissures, supplying the carbonate-rich waters that give rise to the travertines are preferentially developed at the ends of the fault segments or in extensional step-over zones where the offset between the fault strands is about 1 km or more. The deposition of travertines in such structural settings is probably a consequence of the network of fissures supplying the carbonate-rich waters being highly interconnected where extensional strains were …
The Extended Hybrid Model For Optical Phonon Confinement, C. R. Bennett, B. K. Ridley, N. A. Zakhleniuk, M. Babiker
The Extended Hybrid Model For Optical Phonon Confinement, C. R. Bennett, B. K. Ridley, N. A. Zakhleniuk, M. Babiker
Turkish Journal of Physics
The theory of optical phonons and their confinement in heterostructures is reviewed with analogies made to the theory of acoustic phonons. The dielectric continuum (DC) model is obtained when bulk dispersion is ignored and the hybrid model is found when dispersion is included. The issue of boundary conditions is investigated and the solutions are shown with comparisons made using electron-phonon scattering.
The Ammonium Fixation In Great Soil Groups Of Tokat Region And Some Factors Affecting The Fixation I. The Affect Of Potassium On Ammonium Fixation, Kenan Kiliç, M. Rifat Deri̇ci̇, Kadi̇r Saltali
The Ammonium Fixation In Great Soil Groups Of Tokat Region And Some Factors Affecting The Fixation I. The Affect Of Potassium On Ammonium Fixation, Kenan Kiliç, M. Rifat Deri̇ci̇, Kadi̇r Saltali
Turkish Journal of Agriculture and Forestry
The objective of this study was to evaluate the fixation of ammonium in the soils of Tokat region to find out the important factors influencing them. For this purpose 12 representative soil samples were collected from different Great Soil Groups in the region. The amount of ammonium fixed naturally in the samples was found between 41.62-66.90 ppm ammonium (0.29-0.47 me NH 4 -N/100 g. soil). The amounts of ammonium fixed by the soils where increasing amounts of ammonium applied were found between 0.63-1.29%. There was a significant effect from application of potassium to the soils on the fixation of ammonium. …
The Effect Of Bleaching Conditions On The Physical And Optical Properties During The Bleaching Of Ctmp With Peroxide, Mustafa Usta, Ahmet Tutuş
The Effect Of Bleaching Conditions On The Physical And Optical Properties During The Bleaching Of Ctmp With Peroxide, Mustafa Usta, Ahmet Tutuş
Turkish Journal of Agriculture and Forestry
In order to determine the effect of bleaching conditions on the physical and optical properties of pulps during the bleaching of CTMP with H_2O_2, 48 bleaching trials were carried out. After the analysis of the data obtained, the optimum bleaching conditions were as follows: H_2O_2 ratio 2.5-3%, Na_2SiO_3 ratio 3%, NaOH ratio 3%, NaOH/H_2O_2 ratio 0.75, MgSO_4 rate 0.5%, reaction temperature 70ºC, EDTA rate 0.5%, reaction time 80 minutes and concentration 16%. Brightness, breaking length, burst and tear index of CTMP bleached with H_2O_2 were found to be 51.42%, 18.03%, 92.50% and 13.20% respectively, higher than those of unbleached CTMP.
The Effects Of Different Plant Cover Conditions On Erodibility Of Soil, Ahmet Ali̇ Işildar
The Effects Of Different Plant Cover Conditions On Erodibility Of Soil, Ahmet Ali̇ Işildar
Turkish Journal of Agriculture and Forestry
Because of changes in the surface soil structure during winter the highest potential soil erosion usually occurs in spring. This investigation was undertaken in order to determine the effects of different slope and plant cover conditions on the erodibility of soils before the erosive precipitation of spring in the Isparta-Atabey district. In this research, 3 different slopes (%
The Physical And Chemical Properties And Fatty Acid Compositions Of Raw And Brined Caperberries (Capparis Spp.), Musa Özcan
Turkish Journal of Agriculture and Forestry
Fruits of Capparis spinosa L. var. spinosa and Capparis ovata Desf. var. canescens (Coss.) Heywood 0.7-1.9 cm in diameter were collected and brined. The crude oil, fiber and pH, starch, water-soluble, alcohol-soluble and ether-soluble extracts, and the Na, Mn and Zn contents of C. spinosa fruits were higher than those of C. ovata, while they contained less oleic and linoleic acids. The crude protein, oil, fiber and energy, reducing sugars, starch, total carotenoids, ether-soluble extract, hardness, K, P, Cu, Mn, Zn, palmitic and oleic contents of the fermented products were considerably lower compared with the raw fruits. The major fatty …
Physical Properties Of Alder [Alnus Glutinose Subsps. Barbata (C.A.Mey.) Yalt.] Wood Obtained From Rize-Çayeli Region, Yalçin Örs, Nurgül Ay
Physical Properties Of Alder [Alnus Glutinose Subsps. Barbata (C.A.Mey.) Yalt.] Wood Obtained From Rize-Çayeli Region, Yalçin Örs, Nurgül Ay
Turkish Journal of Agriculture and Forestry
In this study, physical properties of Alder Wood [Alnus glutinose subsps. barbata (C.A.Mey.)Yalt.] were investigated. 10 trees used for experiments were obtained from Rize-Çayeli region and samples were then prepared in accordance with the related standarts. Width of annual rings, density in oven-dried and airdried position, density value in volume, the amount of shrinkage and swelling, the ratio of cell walls and air cavities, the moisture content of wood at green condition, and the fiber saturation point as physical properties were determined. Results indicated that, the mean values were as below: Width of annual rings, 2.61 mm: air dried and …
Changes In The Stability Of Frozen Puff Pastry Doughs During The Shelf Life, Orhan Dağlioğlu, Murat Taşan, Bariş Tunçel
Changes In The Stability Of Frozen Puff Pastry Doughs During The Shelf Life, Orhan Dağlioğlu, Murat Taşan, Bariş Tunçel
Turkish Journal of Agriculture and Forestry
In this research changes in the free fatty acidity (%) and peroxide values, fatty acid composition, specific height and sensory properties of puff pastry doughs were investigated during the shelf-life (12 months) by storing them at -18 °C after being frozen at -40°C. Samples were made of puff pastry margarines belong to three different company. Free fatty acidity (%) and peroxide values were slightly increased with duration of shelf-life while the changes in the free fatty acid composition have remained at limited level. Spesific height that is an important quality criteria of baked puff pastries decreased gradually in all samples. …
Effect Of Phosphorus Fertilizers And Application Methods On The Yield Of Wheat Grown Under Dryland Conditions, Sabri̇ Gökmen, Özer Sencar
Effect Of Phosphorus Fertilizers And Application Methods On The Yield Of Wheat Grown Under Dryland Conditions, Sabri̇ Gökmen, Özer Sencar
Turkish Journal of Agriculture and Forestry
This study was conducted to investigate the efficiency of diammonium phosphate (DAP) and triple superphosphate (TSP) as phosphorus (P) sources and the effect of fertilizer application methods on the grain yield, yield components and other characteristics of winter wheat. The research was conducted in the ecological conditions of Tokat-Kazova during the 1990-1991 and 1991-1992 growing seasons. Bezostaja-I and Kirkpinar-79 cultivars were used as the plant materials. DAP and TSP fertilizers were applied according to four different methods, i. e., broadcasting, with seed, application 5 cm to the right and left of the seed and 5 cm below the seed. The …
The Effect Of Interesterification Reactions On The Tocopherols And The Sterols In Fats, Azi̇z Teki̇n, Muammer Kayahan
The Effect Of Interesterification Reactions On The Tocopherols And The Sterols In Fats, Azi̇z Teki̇n, Muammer Kayahan
Turkish Journal of Agriculture and Forestry
In this study, interesterification which has been used in developed countries for years and tried in Turkey recently, was applied to a sunflower oil and beef tallow blend (80:20). 25 sample fats were obtained by applying interestification at different temperatures and times by adding 0.3% sodium methoxide. The changes in the tocopherols and sterols of these fats were investigated. It was determined that the reaction was completed at 70°C in 45 minites and at higher temperatures and longer times using lipase hydrolysis. In conclusion tocopherols and sterols were esterified more quickly as time and temperature increased. Therefore, they were more …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
The Effect Of Water Content On The Penetration Resistance Of Different Soils, And Regression Models, Cevdet Şeker
The Effect Of Water Content On The Penetration Resistance Of Different Soils, And Regression Models, Cevdet Şeker
Turkish Journal of Agriculture and Forestry
The purposes of this study were to determine the relationships between soil water content and soil penetration resistance, and to develop regression models for comparing penetration resistance in different soils. A field study was conducted on four different soils in Entisol on the Konya plain. Significant relationships were found between soil water content and soil penetration resistance (r^2= 0.77 to 0.99). The results of regression analysis showed that the regression equation was Y=a+bX^3, in which Y was penetration resistance (kPa) and X was soil water content (%), a and b were constants changing with soil and different layers of the …
Effects Of Surface Coating Materials On The Physical And Mechanical Properties Of Particleboard Used For Kitchen Cabinets And Surface Quality Properties: Part 1. Effects Of Physical Properties, Turgay Özdemi̇r, Hülya Kalaycioğlu, Abdulkadi̇r Malkoçoğlu, Gökay Nemli̇
Effects Of Surface Coating Materials On The Physical And Mechanical Properties Of Particleboard Used For Kitchen Cabinets And Surface Quality Properties: Part 1. Effects Of Physical Properties, Turgay Özdemi̇r, Hülya Kalaycioğlu, Abdulkadi̇r Malkoçoğlu, Gökay Nemli̇
Turkish Journal of Agriculture and Forestry
In this study, the effects of surface coating materials on the physical and mechanical properties of particleboard used for kitchen cabinets and surface quality properties were investigated. But, in this part, effects of these on the physical properties on particleboard were investigated. 18 mm thickness particleboard were obtained from four different sources belong to private sector for producing test samples. Coated and varnished veneer , lacquer coating, continious pressure laminate, high pressure laminate and polivinylchloride coating were applied on these samples. The following were recorded during the experiments: Spesific gravity, water absorbtion and thickness swelling. As a result of this …
The Determination Of Fitness Of Various Isotherm Equations To Moisture Sorption Data Of Kırık, Lancer Barley, Rye, Oat And Corn, Fati̇h Ertugay, Muharrem Certel
The Determination Of Fitness Of Various Isotherm Equations To Moisture Sorption Data Of Kırık, Lancer Barley, Rye, Oat And Corn, Fati̇h Ertugay, Muharrem Certel
Turkish Journal of Agriculture and Forestry
In this research, the fitness of Halsey, Henderson, Harkins-Jura, BET, Smith and Freundlich isotherm equations to moisture sorption data at 20, 25, 35, 50 and 70°C of Kırık, Lancer, barley, rye, oat and corn were investigated. Isotherm equations, fitted quite well to obtained sorption data, were determined and parameter constants of the equations were calculated by regression using the lineer form of the isotherm equation. The best fitness was seen in Henderson equation as low fitness was seen for BET equation.
The Effect Of Fish Oil On Liver And Plasma Mda And Antioxidant Status Of Rats, Nuriye Mete, Birgül Işik, Levent Erdi̇nç, Fuat Gürkan
The Effect Of Fish Oil On Liver And Plasma Mda And Antioxidant Status Of Rats, Nuriye Mete, Birgül Işik, Levent Erdi̇nç, Fuat Gürkan
Turkish Journal of Medical Sciences
The question how fish oil (FO) and soybean oil (SO) change the state of antioxidant and the lipid peroxidation in liver and plasma of rats and the protective role of vitamin E were investigated. Six-week-old forty male Sprague-Dawley rats were divided into five groups. One of the groups fed a control diet, another one fed SO, while the other three groups fed FO diet at the level of 10% Vitamin E supplementation was maintained to three different levels 3, 50, 150 IU/per kg diet in the FO diets and 3 IU vitamin E per kg of the SO diet. At …
Effect Of Exercise On Blood Antioxidant Status And Erythrocyte Lipid Peroxidation: Role Of Dietary Supplementation Of Vitamin E, Mustafa Kelle, Hüda Di̇ken, Abdurrahman Şermet, Mukadder Atmaca, Cemi̇l Tümer
Effect Of Exercise On Blood Antioxidant Status And Erythrocyte Lipid Peroxidation: Role Of Dietary Supplementation Of Vitamin E, Mustafa Kelle, Hüda Di̇ken, Abdurrahman Şermet, Mukadder Atmaca, Cemi̇l Tümer
Turkish Journal of Medical Sciences
We tested the effects of moderate physical exercise on the blood antioxidant capacity and erythrocyte lipid peroxidation in 21 Wistar albino rats. Erythrocyte superoxide dismutase (SOD) activity increased significantly (p