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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: 3)
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: 4349)
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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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  [187 journals]
  • TIME SERIES OUTLIER ANALYSIS FOR MODEL, DATA AND HUMAN-INDUCED RISKS IN
           COVID-19 SYMPTOMS DETECTION

    • Authors: Ahmet KAYA; Rojan GÜMÜŞ, Ömer AYDIN
      Abstract: Information systems are important references aiming to support the decisions of decision-makers. Information reliability depends on the accuracy and efficacy of data and models. Therefore, some risks may emerge in information systems concerning models, data and humans. It is important to identify and extract outliers in decision support systems developed for the health information systems such as the detection system of Covid-19 symptoms. In this study, the risks that are important in decision making in Covid-19 symptom detection were determined by the statistical time series (ARMA) approach. Potential solutions are proposed in this way. Moreover, outliers are detected by software developed by using the Box-Jenkins model and reliability and accuracy of data is increased by using estimated data instead of outliers. In the implementation of this study, time-series-based data obtained from laboratory examinations of Covid-19 test devices can be used. With the method revealed here, outliers originating from healthcare workers or test apparatus can be detected and more accurate results can be obtained by replacing these outliers with estimated values.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL EVALUATION OF ESTER DERIVATIVES
           OF 4-(DIETHYLAMINO)SALICYLALDEHYDE AS CHOLINESTERASE, AND TYROSINASE
           INHIBITORS

    • Authors: Reşit ÇAKMAK; Ercan ÇINAR, Eyüp BAŞARAN, Mehmet BOĞA
      Abstract: Alzheimer's Disease (AD), one of the diseases that still has no a specific therapy, has become a major public health issue owing to the increasing population of the elderly, particularly in rich countries. Inhibitory of cholinesterase enzymes (acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), which hydrolyze acetylcholine (ACh) and butyrylcholine (BCh) neurotransmitters, have recently become a choice for therapy of this disease. Therefore, there is currently a great demand for novel enzyme inhibitors with desirable properties for applying in the treatment of AD. A series of ester derivatives of 4-(diethylamino)salicylaldehyde 1-5 were successfully prepared in present work, and structurally illuminated with FT-IR, 1H and 13C NMR spectroscopy. The inhibition properties of the title molecules on AChE, BChE, and tyrosinase enzymes were extensively investigated, respectively. Compound 1 indicated potent inhibitory properties against BChE with 87.28±0.87% inhibition better than galantamine (73.83±0.25 %inhibition) employed as standard. Compound 3 showed potent inhibitory effect against tyrosinase with 87.73±0.22 % inhibition, which are better than kojic acid utilized as standard. The obtained results clearly revealed that some of these enzyme inhibitors have the potential to be utilized as potent enzyme inhibitors in the future.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • IN-VITRO INVESTIGATION OF DONKEY MILK EFFICACY AGAINST STANDARD
           STAPHYLOCOCCUS AUREUS STRAINS

    • Authors: Akin YIĞIN; Mehmet DEMİRCİ, Serap KILIÇ ALTUN, Bekir KOCAZEYBEK
      Abstract: has been used for therapeutic purposes since ancient times. Different studies report its antimicrobial activity against an important human pathogen such as S. aureus. Therefore, in our study, we aimed to examine the antimicrobial efficacy of donkey milk against standard MRSA and MSSA strains in-vitro environment. In our study, in-vitro antimicrobial efficacy of donkey milk obtained from 53 different donkeys against S. aureus ATCC 43300 (MRSA) and S. aureus ATCC 29213 (MSSA) was investigated by broth microdilution method. Donkey milk mixed with TSB medium at different serial dilution rates was studied in 96 microwell plates. When the effectiveness of different concentrations of donkey milk added to TSB medium in vitro against ATCC MRSA and MSSA strains was examined, no suppression was observed, and growth was found to be higher than the control results after 24 hours of incubation at high milk concentrations. In conclusion, according to the results of our study, no antimicrobial effect of donkey milk was observed in-vitro against standard MRSA and MSSA strains. This situation may be caused by the fact that S. aureus strains may have different virulence abilities, as well as the differences in protein structure in milk between species.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • INCUBATION SHARING OF NORTHERN BALD IBIS PARTNERS

    • Authors: Ahmet KILIÇ; Ersin UYSAL
      Abstract: The study was carried out during the free-flying period. Pairs share the incubation between the two sexes. In observations made between 2013 and 2015 (n=79 in day). Females incubated for 177.08 minutes per day on average while males incubated for 240.99 minutes per day. This incubation period is statistically different (P< 0.0001) withmales staying 23-32% longer than females. Females and males stayed in incubation together for only a short time. According to observations made(n=79), couples stay together on nests for 20.52 minutes in average. During the observations made all day long it was realized that eggs are left alone only 0.40 minutes on average.Incubation periods did not vary according to years. According to the observations made in 2013 (n=100) period for staying in the nest were not different than observations of years 2014 and 2015 statistically (P>0.05). According to 2014 (n=128) and 2015 (n=88) results no statistical difference could be observed between incubation periods (P>0.05).The excess eggs during incubation are protected by northern bald ibises which does not have any nest (altruism). From time to time synchronized behaviors can be observed in the population.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • ESTIMATION OF NEUTRONS OCCURRING IN THE LINAC ROOM AT DIFFERENT PHOTON
           ENERGIES

    • Authors: Taylan TUĞRUL
      Abstract: The high energy photons produced by the Linear accelerator (Linac) induce some nuclear reactions in the materials in the Linac room and Linac head. Neutrons formed as a result of the interaction of photons with materials are called photoneutrons. The aim of the study is to examine the neutron doses formed in the environment for 6 different photon energies. In the study, the components in the Linac head and the Linac chamber are modeled with the help of the Monte Carlo N-Particle (MCNP) program. Then, the flux and dose of photoneutrons formed at 8 different points as a result of 6 different photon energies obtained from the Linac head were measured. as can be seen from the results, as the photon energy used in the Linac increases, the resulting dose and flux of photoneutron increase. It can be understood from results that the amount of neutron dose to be received by the organs in the treatment field may be higher than the other organs. Especially in the treatments where the patient is lying in the prone position, there may be a possibility of neutrons reaching the patient spinal cord. Since photoneutrons with high radiobiological ability may pose a risk of secondary cancer for patients, the photon energy chosen for patient treatments should be chosen appropriately and the use of unnecessary high photon energy should be avoided.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • INVESTIGATION OF PLACENTAL HOFBAUER CELLS BY IMMUNOHISTCHEMSTRY METHODS IN
           COMPLICATED PREGNANCIES

    • Authors: Yusuf NERGİZ; Şebnem NERGİZ ÖZTÜRK, Fırat AŞIR, Ayşe ŞAHİN, Elif AĞAÇAYAK
      Abstract: Development of placenta without any complication is essential for normal pregnancy. Placenta is a multifunctional organ that plays a vital role in fetal development. Hofbauer cells are one of the most important groups of placental cells. These cells are placental macrophages and have a role in many placental events. The aim of this study is to investigate the placental distribution and density of Hofbauer cells and to contribute to the understanding of the causes and pathogenesis of complicated pregnancies. In this study, 60 full-term placentas were divided into 4 equal groups: control, preeclampsia, gestational diabetes and HELLP group. Placenta were dissected and the samples were fixed 10% neutral buffered formalin. Following routine paraffin wax procedure, 5 µm sections were stained with CD68 for marking Hofbauer cells. In immunohistochemical evaluation, Hofbauer cells in villous stroma showed positive CD68 expression. Immunostaining Findings: CD68 showed a granular staining pattern in the cytoplasm of Hofbauer cells. The group with the highest CD68 positive cell number was HELLP group and the number of cells per cell (1.46 ± 0.25) was significantly different from all groups. CD68 positive cell count in the placental villus were the highest in HELLP group and the number of Hofbauer cells per villus was significantly different from the other groups.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • BIOSENSOR PROPERTIES OF PLASMONIC SILVER NANOPARTICLES PRODUCED BY PLD

    • Authors: İlhan CANDAN; Serap YİĞİT GEZGİN, Yasemin GÜNDOĞDU, Hadice BUDAK GÜMGÜM
      Abstract: Plasmonic metal nanoparticles (NPs), such as Ag, Au, Cu NPs, attracts a lot of interest due to their notable applications in biological, and chemical sensing. Researchers have studied on plasmonic metal NPs which have exceptional optical properties in a large spectral region. Metal NPs form a unique surface plasmon resonance (SPR) peak that is in the electromagnetic spectrum’s visible part. The peak of SPR firmly depends on the NP’s size, shape, dielectric constant, and medium that the particle is in. Light interacts with nanoparticles that are smaller than the wavelength of incident light in localized surface resonance. That leads Localised Surface Plasmon Resonance (LSPR) in which an oscillating local plasma around NP with a certain frequency form. LSPR detection is the most common method for wavelength shift measurement. Analyte absorption causes a change in the local dielectric constant and thus LSPR peak shifts. Biological molecules such as proteins and antibodies can sensitively be detected as they change the local dielectric environment. Therefore, Ag or Au metal NPs can be used as sensor by employing LSPR wavelength shift technique. Among the metal NPs, Ag has a relatively higher refractive index sensitivity. Since Ag NPs have a shaper LSPR peak, they generate more precise measurements. In our work, we have produced plasmonic Ag NPs with various sizes and spherical shapes by employing Pulsed Laser Deposition (PLD). We investigated the LSPR peaks of produced plasmonic Ag NPs by UV-Vis spectroscopy. Moreover, biosensor properties of plasmonic Ag NPs are investigated by binding Protein A molecules to surface of the NPs. That produced a LSPR wavelength shift of around 100 nm/RIU.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • INVESTIGATION OF Pd@g-C3N4/TiO2 NANOPARTICLES AS PHOTOCATALYST IN THE
           DEGRADATION OF METHYLENE BLUE UNDER VISIBLE LIGHT IRRADIATION

    • Authors: Halil İbrahim ÖNAL; Feyyaz DURAP
      Abstract: In the present study, the efficiency of Pd@g-C3N4/TiO2 NPs as photocatalyst on degradation of organic pollutant methylene blue (MB) dye under visible light has been investigated. A traditional one-step impregnation-reduction method was used for the preparation of photocatalysts. Pd@g-C3N4/TiO2 NPs were characterized by several techniques such as FT-IR, DR/UV-Vis, SEM-EDX, TEM, P-XRD, and XPS analyses. The photocatalytic performance of Pd@g-C3N4/TiO2 NPs was evaluated for the degradation of MB dye under visible light irradiation. Among different loadings of Pd(0.3, 0.5, and 0.7 %), the 0.5% loading Pd@ g-C3N4/TiO2 NPs showed the highest catalytic activity. The results revealed an enhancement in the visible light photocatalytic activity of g-C3N4/TiO2 when it was coupled with Pd in the composite. Compared with pure g-C3N4/TiO2, the Pd@ g-C3N4/TiO2 hybrid photocatalyst exhibited enhanced visible light photoactivity, which was approximately three times higher than that of pure g-C3N4/TiO2.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
  • THREE MSA TOOLS ANALYSIS in DNA and PROTEIN DATASETS

    • Authors: Fırat AŞIR; Tuğcan KORAK, Özgür ÖZTÜRK
      Abstract: Multiple sequence alignment (MSA) is used to align three or more sequences of DNA, RNA and protein. It is prominent for constructing phylogenetic trees and evolutionary relationships between sequences with regard to similarities and dissimilarities. Variety of multiple sequence alignment tools are available online, each having different methods and parameters to align sequences. In this article three MSA tools; CLUSTALW, SAGA and MAFFT are used for five datasets BALiBASE_R9, DIRMBASE, SABmark and additionally constructed DNABali and ProteinBali for alignment. Result show that for both protein and DNA dataset, MAFFT may be more useful among three of MSA tool used.
      PubDate: Thu, 30 Dec 2021 00:00:00 +030
       
 
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