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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 201 - 265 of 265 Journals sorted by number of followers
Revista Científica de la Universidad Nacional del Este     Open Access   (Followers: 9)
Patterns     Open Access   (Followers: 5)
History of Science and Technology     Open Access   (Followers: 5)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Research Policy : X     Open Access   (Followers: 4)
Data     Open Access   (Followers: 4)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 4)
Frontiers in Climate     Open Access   (Followers: 4)
Research     Open Access   (Followers: 4)
MUST : Journal of Mathematics Education, Science and Technology     Open Access   (Followers: 4)
People and Nature     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 3)
Orbis Cógnita : Revista Científica     Open Access   (Followers: 3)
Science & Technology Studies     Open Access   (Followers: 3)
Journal of Big History     Open Access   (Followers: 3)
Discover Sustainability     Open Access   (Followers: 3)
Citizen Science : Theory and Practice     Open Access   (Followers: 2)
International Journal of Culture and Modernity     Open Access   (Followers: 2)
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 1)
Scientonomy : Journal for the Science of Science     Open Access   (Followers: 1)
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
Uluslararası Bilimsel Araştırmalar Dergisi (IBAD)     Open Access   (Followers: 1)
Journal of Science and Engineering     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
AAS Open Research     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
ARPHA Conference Abstracts     Open Access   (Followers: 1)
Impact     Open Access   (Followers: 1)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
Revista Saber Digital     Open Access   (Followers: 1)
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Experimental Results     Open Access   (Followers: 1)
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
Jaunujų mokslininkų darbai     Open Access   (Followers: 1)
iScience     Open Access   (Followers: 1)
Fundamental Research     Open Access  
BJHS Themes     Open Access  
South American Sciences     Open Access  
Middle European Scientific Bulletin     Open Access  
Journal of Alasmarya University     Open Access  
Research Integrity and Peer Review     Open Access  
Natural Sciences Education     Hybrid Journal  
Proceedings of the Indian National Science Academy     Full-text available via subscription  
Indian Journal of History of Science     Hybrid Journal  
RAC: Revista Angolana de Ciências     Open Access  
The Innovation     Open Access  
Journal of Responsible Technology     Open Access  
Natural Sciences     Open Access  
Revista de la Sociedad Científica del Paraguay     Open Access  
Rekayasa     Open Access  
Rihan Journal for Scientific Publishing     Open Access  
Türk Bilim ve Mühendislik Dergisi     Open Access  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access  
Vilnius University Proceedings     Open Access  
Sciential     Open Access  
ARPHA Proceedings     Open Access  
Gaudium Sciendi     Open Access  
Crea Ciencia Revista Científica     Open Access  
Rafidain Journal of Science     Open Access  
Journal of Al-Qadisiyah for Pure Science     Open Access  
Revista Tecnológica     Open Access  
Himalayan Journal of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access  
Universidad, Ciencia y Tecnología     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Acta Nova     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Revista Politécnica     Open Access  
Reportes Científicos de la FaCEN     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Revista Eletrônica Ludus Scientiae     Open Access  
Emergent Scientist     Open Access  
Journal of Scientific Research and Reports     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Archives of Current Research International     Open Access  
Advances in Research     Open Access  
International Journal of Applied Science     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
J : Multidisciplinary Scientific Journal     Open Access  
Revista Binacional Brasil - Argentina: Diálogo entre as ciências     Open Access  
Revista Ciencia y Tecnología     Open Access  
Journal of Institute of Science and Technology     Open Access  
Journal of Science (JSc)     Open Access  
WikiJournal of Science     Open Access  
Acta Materialia Transilvanica     Open Access  
Integrated Research Advances     Open Access  
PENDIPA : Journal of Science Education     Open Access  
Open Conference Proceedings Journal     Open Access  
Naturen     Full-text available via subscription  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Sci     Open Access  
Maskana     Open Access  
Hoosier Science Teacher     Open Access  
Reports in Advances of Physical Sciences     Open Access  
Facets     Open Access  
Adıyaman University Journal of Science     Open Access  
Revista Brasileira de Iniciação Científica     Open Access  
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Scientific African     Open Access  
Scientific Journal of Mehmet Akif Ersoy University     Open Access  
Black Sea Journal of Engineering and Science     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Gazi University Journal of Science     Open Access  
Middle East Journal of Science     Open Access  
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
Bulletin of the National Research Centre     Open Access  
Uni-pluriversidad     Open Access  
ConCiencia     Open Access  
Ciencia y Tecnología     Open Access  
Revista Bases de la Ciencia     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Ciência ET Praxis     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
International Annals of Science     Open Access  
Science Heritage Journal     Open Access  
Avrasya Terim Dergisi     Open Access  
International Scientific and Vocational Studies Journal     Open Access  
TÜBAV Bilim Dergisi     Open Access  
LOGIKA Jurnal Ilmiah Lemlit Unswagati Cirebon     Open Access  
Dalat University Journal of Science     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Respuestas     Open Access  
Science Diliman     Open Access  
Instruments     Open Access  
Revista Científica y Tecnológica UPSE     Open Access  
HardwareX     Open Access  
Sultan Qaboos University Journal for Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Sainstek : Jurnal Sains dan Teknologi     Open Access  
Revista de Información Científica     Open Access  
Indonesian Journal of Fundamental Sciences     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Jurnal Natural     Open Access  
Frontiers for Young Minds     Open Access  
Revista Ciência, Tecnologia & Ambiente     Open Access  
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Negative and No Positive Results     Open Access  
Revista Conhecimento Online     Open Access  
Nova     Open Access  
CienciaUAT     Open Access  
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Makara Journal of Science     Open Access  
Jurnal Sains Dasar     Open Access  
Indonesian Journal of Science and Technology     Open Access  
Ethiopian Journal of Science and Technology     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  
Heidelberger Jahrbücher Online     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
Estação Científica (UNIFAP)     Open Access  
The Winnower     Open Access  

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Middle East Journal of Science
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2618-6136
Published by DergiPark Homepage  [183 journals]
  • EXPRESSION PATTERN OF BK CHANNELS ON VARIOUS OXIDATIVE STRESS CONDITIONS
           IN SKELETAL MUSCLE

    • Authors: Çağıl COŞKUN; Figen Amber ÇİÇEK, Onur TOKGÜN, Işıl ÖCAL
      Abstract: BK (large conductance Ca2+-activated potassium) channels are expressed in myocytes though changes in their molecular levels in the presence of oxidative stress is not clear, yet. Excessive production of reactive oxygen species leads to many diseases including periodic paralysis. Therefore, determination the molecular effects of various oxidative stress conditions may reveal the possible mechanism and potential therapeutic effects. In the present study, isolated rat soleus muscle where KCNMA1 genes encoding BK channel protein expressed widely in skeletal muscle, were exposed to cyclopiazonic acid (CPA) and also hydrogen peroxide (H2O2) as oxidative stress inducers. Streptozotocin-induced diabetes mellitus model was also used to demonstrate the effects of the endogenous source of oxidative stress. Moreover, NS1619, a BK channel opener was used whether the activation of the channel re-regulate the channel expression back. After the incubation periods, KCNMA1 gene expression levels of each groups were determined by real-time PCR experiments. While CPA and H2O2 decreased the KCNMA1 expression significantly, its expression did not change in systemic diabetes mellitus condition. However, the transcriptional level significantly decreased in diabetes in the presence of H2O2. On the other hand, KCNMA1 expression was re-regulated back to the control’s level by addition of NS1619 in solely hydrogen peroxide groups. The results demonstrated for the first time that acute oxidative stress, rather than systemic conditions, effects the KCNMA1 gene expression level in skeletal muscle. The study was also showed the effects of NS1619 on the regulation of transcriptional levels of BK channel protein in hydrogen peroxide conditions.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
  • MODELLING OF THE SOLAR CELL BASED ON Cu2SnS3 THIN FILM PRODUCED BY SPRAY
           PYROLYSIS

    • Authors: Serap YİĞİT GEZGİN; İlhan CANDAN, Şilan BATURAY, Hamdi Şükür KILIÇ
      Abstract: Cu2SnS3 (CTS) thin film has been produced for 30 ccm sulphur flux rate at 30 minutes annealing durations at 550 oC temperature. CTS thin film’s crystalline structure has been investigated and crystalline size, lattice parameters, dislocation density and microstrain, crystalline number have also been determined. The CTS thin film’s morphological and optical properties have been examined and thoroughly interpreted. Mo/CTS/CdS/AZO solar cell has been modelled based on CTS thin film produced at the present work, using SCAPS-1D simulation programme. Voc, Jsc, FF, conversion efficiency and photovoltaic parameters have been determined depending on neutral defect density at the interface, coefficient of radiative recombination, Auger electron/hole capture’s coefficient and operation temperature of CTS solar cell. As a consequence of simulation study, ideal efficiency of CTS solar cell has been determined to be 3.72 % and all the data obtained in this study have been presented, interpreted and concluded to be original results.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
  • INVESTIGATION OF GLOBOZOOSPERMIA’S MORPHOLOGICAL STRUCTURE AND DNA
           FRAGMENTATION IN OLIGOZOOSPERMIA CASES IN INFERTILE MALES

    • Authors: Zuhal ÇANKIRI; Murat AKKUŞ, Eda YİLDİZHAN, Dilara AKINCI, Fırat AŞIR, Onur DEDE, Muhamet AFŞİN
      Abstract: Total globozoospermia is diagnosed by the presence of 100% round-headed spermatozoa without acrosomes. It is still unclear whether patients whose ejaculate contains both normal and globozoospermic cells (partial globozoospermia) suffer from a variation of the same syndrome. Affected men may experience decreased fertility and even infertility. In some cases, an increased number of cells with DNA fragmentation has also been observed in patients with globozoospermia..In this study, standard semen analysis methods in accordance with WHO criteria were applied to infertile male patient groups consisting of 20 normozoospermic and 20 oligozoospermic individuals who were admitted to our clinic. Age, sperm parameters (volume, vitality, concentration, total motility and morphology) were determined and statistically analyzed in normozoospermic and oligozoospermic infertile men.Sperms were stained with the Eosin-Nigrosin method and were visualized under an immersion lens light microscope and evaluated for vitality. The slides were stained using sperm staining solutions with the Spermac technique and the sperms were evaluated morphologically. Sperm DNA fragmentation damage was evaluated by acridine orange staining method.Our results revealed that sperm morphological features (Kruger test) and sperm DNA fragmentation, obtained with various staining techniques, are important in the clinical approach to male infertility and ART methods, and should be used together.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
  • CHARACTERIZATION OF CU2MNSNS4 THIN FILMS FABRICATED BY SPIN COATING

    • Authors: Canan AYTUĞ AVA; Şilan BATURAY
      Abstract: Cu2MnSnS4 (CMTS) thin films are affected by several parameters related to different annealing including sulphurization flux rate. In this paper, nontoxic CMTS samples were fabricated onto glass substrate by a spin-coating to investigate the effect of various sulphurization flux rate on the crystal structure, tophological and optical properties by X-Ray diffraction, scanning electron microscopy, atomic force microscopy and ultraviolet–visible spectrophotometer, respectively The crystal properties of CMTS thin films are radically changed depending on increase of sulphurization flux rate annealed at 550 °C for 90 minutes. The XRD pattern give CMTS peaks at (112) plane for two samples which correspond to structure of kesterite crystal. The SEM images of films show a decrease in the particle size relate to increase flux rate of sulphurization. The energy band gap for the CMTS films are found to be 1.22 and 1.15 eV for 30 sccm and 40 sccm sulphurization flux rate annealed at 550 °C, respectively.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
  • NOVEL MONONUCLEAR METAL-PHOSPHINITE COMPOUNDS AND CATALYTIC PERFORMANCE IN
           TRANSFER HYDROGENATION OF KETONES

    • Authors: Uğur IŞIK; Nermin MERİÇ, Murat AYDEMİR
      Abstract: Since the obtained chiral alcohols are rather useful as well as biologically active compounds, reduction of ketones to their respective alcohols is a crucial topic in synthetic chemistry. Thus, a new phosphinite ligand was synthesized by the interaction of cationic species N-vinyl imidazolium (1) with PCy2Cl. This phosphinite ligand in combination with [Ru(η6-p-cymene)(µ-Cl)Cl]2 and Ir(η5-C5Me5)(μ-Cl)Cl]2 gave active catalytic systems for transfer hydrogenation reaction. Under optimum circumstances, ruthenium complex (3) showed rather high conversion reduction reaction of acetophenone. Reversibility of the transfer hydrogenation reaction was found to be low under these reaction circumstances.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
  • REVERSE-ENGINEERED DBI-ESSENCE FIELD IN THE RAINBOW GRAVITY

    • Authors: Fatma Figen BİNBAY
      Abstract: The current astrophysical data sets have implied that our universe has recently entered in an accelerated expansion phase. In literature, it is commonly thought that the late-time speedy enlargement behaviour is caused by mysterious dark contents (dark matter, dark energy and dark radiation) that cannot be observed directly. Although Einstein's General Theory of Relativity has provided very successful theoretical explanations and predictions, it cannot explain the aforementioned unusual nature of the cosmos. This situation has led scientists to try to create a new theoretical model for the nature of dark contents. The cosmological constant, scalar fields, unified energy densities, additional dimension idea and modified gravity theories are among the prominent point of views. In this research, mainly, the reverse-engineering method is taken into account in the rainbow gravity formalism for the DBI-essence scalar field dark energy model. As it is known, scalar field models can be introduced with the help of some fundamental physics theories, but these theories do not provide a direct way to write explicitly the self-interaction potentials that we encounter in scalar field models. Therefore, the reverse-engineering method used in this research takes significant role while writing the self-interaction potential of a scalar field model.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
  • DFT INVESTIGATION OF TRANSTION METALS ARENE COMPOUNDS WITH FUNCTIONALIZED
           IONIC LIQUID

    • Authors: Nermin MERİÇ; Nil ERTEKİN BİNBAY, Veysel BİNBAY, Cezmi KAYAN, Murat AYDEMİR
      Abstract: Electrochemical properties and theoretical DFT computations have been carried out for the cationic parts of complexes of ionic liquid-based phosphinite, (1A-3A). The effects of the chemical structures of cationic parts of three complexes were examined in relation to the variable property of electron-donating ligands for ruthenium and iridium complexes were determined. Their potential energy surfaces in the ground state, electronic densities, and also frontier orbitals HOMO and LUMO have been obtained via DFT calculations.
      PubDate: Fri, 17 Jun 2022 00:00:00 +030
       
 
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