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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 201 - 265 of 265 Journals sorted alphabetically
Jurnal Udayana Mengabdi     Open Access  
Karaelmas Science and Engineering Journal     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kennedy Institute of Ethics Journal     Full-text available via subscription   (Followers: 10)
LOGIKA Jurnal Ilmiah Lemlit Unswagati Cirebon     Open Access  
Makara Journal of Science     Open Access  
Malawi Journal of Science and Technology     Open Access   (Followers: 6)
Maskana     Open Access  
Matters Select     Open Access  
MethodsX     Open Access   (Followers: 1)
Metode & Forskningsdesign     Open Access  
Mètode Science Studies Journal : Annual Review     Open Access  
Middle East Journal of Science     Open Access  
Middle European Scientific Bulletin     Open Access  
Modern Applied Science     Open Access   (Followers: 1)
Momona Ethiopian Journal of Science     Open Access   (Followers: 5)
MUST : Journal of Mathematics Education, Science and Technology     Open Access   (Followers: 4)
Mutis     Open Access  
National Academy Science Letters     Hybrid Journal   (Followers: 3)
National Science Review     Hybrid Journal   (Followers: 1)
Natural Sciences     Open Access  
Natural Sciences Education     Hybrid Journal  
Naturen     Full-text available via subscription  
Nepal Journal of Science and Technology     Open Access  
Network Science     Hybrid Journal   (Followers: 4)
New Directions in the Teaching of Physical Sciences     Open Access   (Followers: 2)
Nordic Journal of Science and Technology     Open Access   (Followers: 2)
Nordic Studies in Science Education     Open Access   (Followers: 3)
Nova     Open Access  
Nuncius     Hybrid Journal   (Followers: 2)
OmniScience : A Multi-disciplinary Journal     Full-text available via subscription  
Open Conference Proceedings Journal     Open Access  
Open Journal of Applied Sciences     Open Access  
Orbis Cógnita : Revista Científica     Open Access   (Followers: 2)
Patterns     Open Access  
PENDIPA : Journal of Science Education     Open Access  
People and Nature     Open Access   (Followers: 3)
Población y Desarrollo - Argonautas y caminantes     Open Access  
Politique et Sociétés     Full-text available via subscription   (Followers: 1)
Portal de la Ciencia     Open Access  
Proceedings of the Indian National Science Academy     Full-text available via subscription  
Proceedings of the Linnean Society of New South Wales     Full-text available via subscription   (Followers: 2)
Proceedings of the Royal Society of Queensland, The     Full-text available via subscription  
QScience Connect     Open Access  
RAC: Revista Angolana de Ciências     Open Access  
Rafidain Journal of Science     Open Access  
Rehabilitation Research, Policy, and Education     Hybrid Journal   (Followers: 2)
Rekayasa     Open Access  
Reportes Científicos de la FaCEN     Open Access  
Reports in Advances of Physical Sciences     Open Access  
Research     Open Access   (Followers: 1)
Research Ideas and Outcomes     Open Access  
Research Integrity and Peer Review     Open Access  
Research Policy : X     Open Access   (Followers: 2)
Respuestas     Open Access  
Reviews in Theoretical Science     Full-text available via subscription  
Revista Bases de la Ciencia     Open Access  
Revista Binacional Brasil - Argentina: Diálogo entre as ciências     Open Access  
Revista Brasileira de Iniciação Científica     Open Access  
Revista Catarinense da Ciência Contábil     Open Access  
Revista Ciencia y Tecnología     Open Access  
Revista Ciência, Tecnologia & Ambiente     Open Access  
Revista Científica de la FAREM     Open Access  
Revista Científica de la Universidad Nacional del Este     Open Access  
Revista Cientifica Guillermo de Ockham     Open Access  
Revista Científica y Tecnológica UPSE     Open Access  
Revista Conhecimento Online     Open Access  
Revista Crítica de Ciências Sociais     Open Access  
Revista de Ciencia y Tecnología     Open Access  
Revista de Información Científica     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Revista de la Sociedad Científica del Paraguay     Open Access  
Revista de la Universidad del Zulia     Open Access  
Revista Eletrônica Ludus Scientiae     Open Access  
Revista Logos Ciencia & Tecnología     Open Access  
Revista MundoFesc     Open Access  
Revista Politécnica     Open Access  
Revista Saber Digital     Open Access  
Revista Sociedad y Economía     Open Access  
Revista Tecnológica     Open Access  
Revista Theoria     Open Access   (Followers: 1)
Revista UNIMAR     Open Access  
Revista UniVap     Open Access  
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
Rihan Journal for Scientific Publishing     Open Access  
Royal Society Open Science     Open Access   (Followers: 7)
Ruhuna Journal of Science     Open Access  
Sainstek : Jurnal Sains dan Teknologi     Open Access  
SAINSTIS     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi     Open Access  
Scholedge International Journal of Multidisciplinary & Allied Studies     Open Access  
Sci     Open Access  
Science     Full-text available via subscription   (Followers: 4345)
Science & Diplomacy     Free   (Followers: 3)
Science & Technology Studies     Open Access   (Followers: 3)
Science Advances     Free   (Followers: 27)
Science and Technology     Open Access   (Followers: 2)
Science Diliman     Open Access  
Science Heritage Journal     Open Access  
Science World Journal     Open Access  
Science, Technology and Arts Research Journal     Open Access   (Followers: 1)
ScienceRise     Open Access  
Sciences du jeu     Open Access  
Sciential     Open Access  
Scientific African     Open Access  
Scientific American     Full-text available via subscription   (Followers: 446)
Scientific American Mind     Full-text available via subscription   (Followers: 10)
Scientific Bulletin     Open Access  
Scientific Data     Open Access   (Followers: 5)
Scientific Journal of Mehmet Akif Ersoy University     Open Access  
Scientific Journal of Pure and Applied Sciences     Open Access   (Followers: 1)
Scientific Reports     Open Access   (Followers: 85)
Scientific World     Open Access  
Scientonomy : Journal for the Science of Science     Open Access   (Followers: 1)
Scienze Regionali : Italian Journal of Regional Science     Full-text available via subscription   (Followers: 18)
Selforganizology     Open Access  
Seminário de Iniciação Científica e Seminário Integrado de Ensino, Pesquisa e Extensão     Open Access  
Simbiótica     Open Access  
SINET : Ethiopian Journal of Science     Open Access   (Followers: 5)
Smart Science     Open Access  
South African Journal of Science     Open Access   (Followers: 3)
South American Sciences     Open Access  
South East European University Review (SEEU Review)     Open Access   (Followers: 2)
Springer Science Reviews     Hybrid Journal   (Followers: 2)
Studies in Science Education     Hybrid Journal   (Followers: 18)
Sultan Qaboos University Journal for Science     Open Access  
Tanzania Journal of Science     Open Access   (Followers: 4)
TD : The Journal for Transdisciplinary Research in Southern Africa     Open Access  
Technologies     Open Access   (Followers: 1)
TECNOSCIENZA: Italian Journal of Science & Technology Studies     Open Access   (Followers: 1)
Temas y Debates     Open Access  
The Innovation     Open Access  
The Scientific World Journal     Open Access  
The Social Studies     Hybrid Journal   (Followers: 3)
The Winnower     Open Access  
Theoria     Open Access   (Followers: 3)
THEORIA : An International Journal for Theory, History and Foundations of Science     Full-text available via subscription   (Followers: 1)
Transactions of Tianjin University     Full-text available via subscription  
Trilogía     Open Access  
TÜBAV Bilim Dergisi     Open Access  
Türk Bilim ve Mühendislik Dergisi     Open Access  
Tydskrif vir Geesteswetenskappe     Open Access  
Uluslararası Bilimsel Araştırmalar Dergisi (IBAD)     Open Access   (Followers: 1)
UNED Research Journal / Cuadernos de Investigación UNED     Open Access  
Uni-pluriversidad     Open Access  
Uniciencia     Open Access  
Universidad, Ciencia y Tecnología     Open Access  
Universitas (León)     Open Access  
Universitas Scientiarum     Open Access  
Unnes Science Education Journal     Open Access  
Vilnius University Proceedings     Open Access  
Walailak Journal of Science and Technology     Open Access  
WikiJournal of Science     Open Access  
World Scientific Research     Open Access  
Zeitschrift für Didaktik der Naturwissenschaften     Hybrid Journal  
Образование и наука     Open Access   (Followers: 1)
Східно-Європейський журнал передових технологій : Eastern-European Journal of Enterprise Technologies     Open Access   (Followers: 2)

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Karaelmas Science and Engineering Journal
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2146-4987 - ISSN (Online) 2146-7277
Published by Bülent Ecevit University Homepage  [4 journals]
  • An Alternative Design of X-Ray Imaging Panel based on Raspberry Pi with
           Consumer Electronic Components

    • Authors: Alpman MANALP; Saadet EGELİ, Yalçın İŞLER
      Abstract: Medical imaging is helpful to visualize body structures that cannot be seen with the naked human eye. Medical imaging techniquesare often used to diagnose patients and to follow the threatened diseases. Among these imaging techniques, x-ray-based deviceshave taken a common place. Thanks to the developing technology, flat panel detectors that allow rapid image construction in digitalradiography have been developed. Due to their high costs, these detectors are not easily available for health studies in low-incomecountries. Moreover, it is difficult to use them in studies related to education and basic research in all countries. In this study, animaging panel was designed and its initial prototype was implemented using readily-available consumer electronics components only.The cost of the proposed system is only 0.2% of the cheapest commercial alternative. This prototype panel can produce accurate imageswith 0.1mm resolution for bone-like hard tissues and 0.5mm resolution for soft tissues using the experimental setup of 70 kV and1 mAs. Hence, images obtained with the proposed panel has a moderate resolution and quality. As a result, although the developeddesign is not sufficient for medical use yet, it is a cheap alternative for educational and basic research purposes at least.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Purification and Characterization of Glucose-6-Phosphate Dehydrogenase
           from the Liver of Chelon Auratus (Risso, 1810)

    • Authors: Salih GÖRGÜN; Emre KOÇ
      Abstract: In this study, glucose-6-phospahte dehydrogenase (EC. 1.1.1.49) from the liver of Chelon auratus (Risso, 1810), an economicallyimportant mullet species, were purified with purification parameters of 252-fold purity, a specific activity of 27.04 EU/mg.proteinand a yield of 27.42%. The optimum temperature, pH and ionic strength were found to be 40 ºC, pH 8 and 0.1 M, respectively, forthe enzyme preparation obtained. The kinetic behavior of the enzyme was evaluated for both G6P and NADP+. According to thedata obtained, Km and Vmax values were determined as 0.14 mM and 3.40 EU/mL for NADP+, respectively, while it was found to be0.23 mM and 2.62 EU/mL for G6P, respectively. These data have been suggested that the enzyme has higher affinity for the NADP+,when compared with G6P as a substrate. According to the SDS-PAGE analyses of the purified enzyme, it was observed that therewere two protein bands having molecular weight of 108 kDa and 60 kDa. The results obtained have been suggested that additionalchromatographic steps might be required for the purification of glucose-6-phospahte dehydrogenase from the mullet species.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • A Theoretical Study on Radiation Shielding Characteristics of Magnetic
           Shielding Alloys, Ni80Fe15Mo5 and Ni77Fe14Cu5Mo4, by Determining the
           Photon Attenuation Parameters in the Energy Range of 15keV-100GeV

    • Authors: Zeynep AYGUN; Murat AYGÜN
      Abstract: In this study, we aimed to calculate photon-matter interaction parameters of Ni80Fe15Mo5 and Ni77Fe14Cu5Mo4, which are known asmagnetic shielding alloys. The parameters were determined by using Phy-X/PSD software. The radiation attenuation parameters suchas mass attenuation coefficient, linear attenuation coefficient, effective atomic number, half-value layer, tenth-value layer, total atomiccross section and total electronic cross section were calculated between the photon energies 15keV and 100GeV in order to determinethe radiation shielding potentials of the alloys. The shielding potentials of the alloys were compared with those of widely used shieldingmaterials reported before.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Voltammetric Determination of Pendimethalin with Nafion-Graphene Modified
           Glassy Carbon Electrode

    • Authors: Berna KOÇAK; Hüseyin ÇELİKKAN
      Abstract: In this study, the voltammetric behavior of pendimethalin was investigated at a glassy carbon electrode (GCE) and a nafion-graphenemodified glassy carbon electrode (n-GR/GCE). The electrochemical characterization of pendimethalin was carried out using cyclicvoltammetry (CV) technique. For the determination studies performed with GCE, the differential pulse voltammetry (DPV) techniquewas employed, while the differential pulse adsorptive stripping voltammetry (DPAdSV) method was used for the determinationstudies with n-GR/GCE. First of all, optimal experimental conditions were established for both electrodes, a calibration curve wasplotted and linear working ranges were identified. For the 1st peak current of pendimethalin, the working range of the calibrationcurve drawn by DPV technique with GCE was 1.56×10-6-1.08×10-3 M with the limit of detection (LOD) value calculated as 3.09×10-5M. For the 2nd peak current of pendimethalin, the working range of the calibration curve created by DPV technique with GCE was1.56×10-6-9.73×10-4 M and the LOD value was found to be 3.36×10-6 M. For the 1st peak current of pendimethalin, the working rangeof the calibration curve constructed by DPAdSV technique with n-GR/GCE was determined to be 1.76×10-6-4.01×10-4 M with theLOD value being 8.69×10-6 M. For the 2nd peak current of pendimethalin, the working range of the calibration curve obtained byDPAdSV technique with n-GR/GCE was 1.96×10-9-7.53×10-4 M with the LOD value calculated as 1.05×10-9 M.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Review and Recommendations for Preloaded High Strength Structural Bolts
           Used for Steel Element Connections and Joints Under Seismic Loads Per
           Turkish Seismic Code Requirements and Design Principals

    • Authors: Ahmet Muhtar ÇITIPITIOĞLU
      Abstract: Provisions for preloaded high strength bolt for steel element connections under seismic loads in Turkish design codes are reviewed.Ductile design is essential to achieve targeted performance levels for load bearing structural systems under seismic loads in the TurkishSeismic Code. Codes require the use of preloaded 8.8 or 10.9 high strength bolts per TS EN 14399 for the connections of elementssubjected to seismic loading. The most commonly used HR and HV type TS EN 14399 bolts are not differentiated in the codealthough their structural behavior is very different due to their geometry. HR type bolts are shaped to yield and fail in a ductile mannerunder axial loads. HV bolts have a shorter threaded length and thin nuts resulting in thread yielding and brittle thread stripping failurewhile preloading or under axial loads. Bolts failing with thread stripping during an earthquake will cause non-ductile connectionfailure. Due to risk of thread yielding and stripping which result in a connection behavior counter to seismic design principals theauthor recommends that HV type bolts not be allowed to be used in structural connections of steel elements resisting seismic loads inthe Turkish design codes.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Flow and Mixed Convection with Heat Transfer Around a Square Cylinder

    • Authors: Zerrin SERT
      Abstract: The influence of opposing buoyancy on the laminar flow field and heat transfer characteristic is investigated across a square cylinderin a vertical channel numerically. “Opposing flow” means that the buoyancy flow and fluid motions are in opposite directions. Theworking fluids are air (Pr = 0.7) and water (Pr = 7). The flow and heat transfer simulations were changed with Reynolds number (100and 200) and under various Richardson numbers (from 0 to 0.5). The numerical analysis was carried out by Ansys-Fluent software.The effect of buoyancy was incorporated into the Navier-Stokes equations using the Boussinesq approximation. Unsteady mixedconvection heat transfer and fluid flow characteristics such as Nusselt number, Strouhal number, the drag and lift coefficient wereobtained for each case. Also, the isotherms were depicted for each simulation. It was observed that the Strouhal number, the mean dragcoefficient and Nusselt number decreased with the decrease of the Richardson number; but, CL,rms increased.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Determination of Microbial Flora of Model Insect Galleria mellonella in
           Different Life Forms Reared on Artificial Diet

    • Authors: Serkan SUGEÇTİ
      Abstract: Model insects are used as an alternative experimental model to vertebrate experimental animals in many fields such as medicine,pharmacy and veterinary medicine due to their low production cost, ethical problems and easy culture in laboratory conditions.The most common problem encountered during the production of model insects in artificial diet under laboratory conditions isbacteria, yeast and mold contamination. In this study, seven different bacterial species, four gram negative and three gram positive, wereidentified in vitro in different life stages of the model insect Galleria mellonella. As microfungus genera Alternaria spp., Aspergillus spp.,Beauveria sp., Penicillium spp. and Verticillium sp. The highest number of colonies in their life stages is defined as the species belongingto the genus Aspergillus and Penicillium, while the least belong to the genus Verticillium determined. This study is very important interms of defining microflora in artificial diet and standardizing production areas of insects under laboratory conditions
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • The Research about the Technological Properties of Nepheline Syenite in
           Akpınar (Kırşehir) Region

    • Authors: Serhan HANER
      Abstract: The largest fields of consumption of nepheline syenite are the glass and ceramic industries. Its not containing free silica, containinghigh alkali and alumina, high melting power, and narrow melting range are ideal characteristics for the glass industry. Its field of use invarious branches of the industry and the largest reserves of this valuable raw material whose quantity is rapidly increasing are found inRussia, Canada, Norway, Brazil, China, and Turkey. Its mining in Turkey is done in the Akpınar region of Kırşehir. Akpınar-Kırşehirregion nepheline syenite is one of the smallest intrusive masses in the Central Anatolian Crystalline Karm dish spread and consistsof alkali plutonic rocks. As a result of nepheline syenite being seen as an expensive raw material other than its being accustomed toin terms of industrialists in Turkey, it is being consumed at low quantities. It has also been seen that scientific studies in an academicsense about this raw material, which has not been shown sufficient interest, are limited. The energy consumption occurring during thereduction of the particle size of the raw materials is related to the crystal structure, physical and mechanical properties of the rock. Inthis study, mineralogical, thermal, physical and mechanical properties and Hardgrove grindability of nepheline syenite in Akpınar-Kırşehir region were investigated. The mineralogical properties of nepheline syenite were determined by X-Ray diffraction (XRD) andthin section studies; The thermal properties were determined by thermogravimetric and differential scanning calorimetry (DSC/TGA)and firing color measurement. Physical properties of unit weight, water absorption rate and porosity values; Among the mechanicalproperties, Schmidt surface hardness, Ultrasonic P wave velocity and uniaxial compressive strength values were determined. In addition,the Bond work index value was calculated from the HGI value.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Structural and Dynamic Properties of 38-atom Ni-Pt-Cu Ternary Nanoalloys

    • Authors: Hüseyin YILDIRIM; Haydar ARSLAN
      Abstract: In this study, global optimizations of Ni6PtnCu32-n (n=0-32) ternary nanoalloys were performed by modelling interatomic interactionswith Gupta many-body potential and by Basin Hopping algorithm. Stability of nanoalloys were investigated with the excess energyanalysis and bond number analysis. The global minimum structures of all compositions obtained as a result of optimization weretaken as the initial configurations in Molecular Dynamics (MD) simulations. Melting temperatures of Ni6PtnCu32-n (n=0-32) ternarynanoalloys were investigated with the MD simulations in canonical ensemble conditions (NVT). Caloric curve and Lindemannindex were used to determine the melting transitions. As a result of MD simulations of Ni6PtnCu32-n (n=0-32) ternary nanoalloys, itwas determined that the melting temperatures fluctuate depending on the composition. Also, dynamic behaviours of the most stablecomposition obtained as a result of optimization in melting process investigated by different analysis method such as Bond-angleanalysis (BAA) and root mean square displacement (RMSD).
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
  • Microencapsulation of Pumpkin Seed Oil with Complex Coacervation Method

    • Authors: Emel MORAL; Okan BAYRAM, Elif KÖKSAL, Fatma DANAŞ, Fethiye GÖDE
      Abstract: Pumpkin plant, which is among the subspecies of Cucurbitaceae family, is an agricultural product with different types and seedsare consumed. Since it is a rich source of fatty acids, pumpkin seed oil is important not only in the food industry, but also in thepharmaceutical and cosmetics industry. In this study, pumpkin seed oil was encapsulated with complex coacervation method in anexperiment set created with response surface methodology (RSM). Temperature (50.00 0C – 60.00 0C) and pH (3.80 – 4.20) wereused as independent variables in RSM, and experimentally calculated encapsulation efficiency (%EV) was used as dependent variable.The highest EV% in the experimental set 79.63% and 55.00 0C and 4.00 pH values were reached. In ANOVA results calculated forRSM; R2 = 99.44%, lack of fit p value = 0.11. The lack of fit p value (p>0.05) indicates that the model matches the data. The samplesencapsulated for each set of experiments were characterized by an optical microscope. As a result of our study, the relationship betweeninput variables and response was evaluated with the help of the literature.
      PubDate: Wed, 15 Dec 2021 00:00:00 +030
       
 
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