Yayınlar
Koleksiyondaki öğeler
- MakaleAçık Erişim2018Scopus SJRQ3Maslinic acid as an effective anticancer agent
Lin, Xiukun; Ozbey, Ulku; Uteuliyev, Yerzhan Sabitaliyevich; Attar, Rukset; Ozcelik, Beraat; Zhang, Yuanyan; Guo, Mingyue; Liu, Minghua; Alhewairini, Saleh S.; Farooqi, Ammad Ahmad
Maslinic acid (2α,3β-dihydroxyolean-12-en-28-oic acid) is a naturally occurring pentacyclic triterpenic compound. Maslinic acid is gradually gaining attention as an excellent pharmacologically active product because of its premium biological properties. In this review we will focus on chemopreventive properties of Maslinic acid against different cancers. Seemingly, available data is limited and we have yet to unravel how Maslinic acid therapeutically targeted oncogenic cell signal transduction cascades in different cancers. Moreover, there are visible knowledge gaps about the ability of Maslinic acid to modulate oncogenic and tumor suppressor microRNAs in various cancers.
AtıfScopus20OpenAlex17
İncele - MakaleYalnız künye2020Scopus SJRQ2The effect of graphene oxide on structural, opto-electrical and thermal properties of manganese sillenite (Bi12MnO20) nano-powders
Aydin, C.; Taskin, M.; Aydin, H.
In this study, manganese sillenite nano-powders were produced by hydrothermal method by adding graphene oxide in different mass amounts. Structural, morphological, thermal, optical and electrical properties of the obtained undoped and graphene-oxide-doped samples were investigated. XRD results showed that the produced samples had nano-sizes and the crystal sizes changed with the addition of graphene oxide. SEM and TEM images showed that the microstructures of the samples were nano-sized and composed of randomly oriented particles without orientation relationship between them. From FT-IR spectra of the samples, chemical properties and bond structures were determined. With the help of thermal analysis measurements, reactions in the sample structures at increasing temperatures, reaction temperatures, reaction energies and total mass losses were determined. The forbidden energy ranges of the samples decreased at significant rates with the addition of graphene oxide. By checking the P–E hysteresis cycles, the samples are understood to show ferroelectric properties. Dielectric measurements and temperature-dependent electrical conductivity measurements of the produced nano-powders confirmed that the samples exhibited semiconductor behaviour. The obtained results showed that manganese sillenites can be synthesised by low-temperature hydrothermal method and physical, chemical and thermal properties can be controlled by adding different amounts of graphene oxide for use in electronic and energy applications.
AtıfScopus6WoS6OpenAlex6İncele - MakaleYalnız künye2020Scopus SJRQ1Futuristic airport: A sustainable airport design by integrating hesitant fuzzy SWARA and hesitant fuzzy sustainable quality function deployment
Kayapinar Kaya, Sema; Erginel, Nihal
The interest of researchers and airport authorities towards sustainable airports is increasing day by day. Futuristic airport designs will be innovative in achieving sustainable development practices such as clean and affordable energy, protection of natural resources, waste reduction, natural features and green space around an airport, sustainable transportation system, natural storm water management of airports, etc. In classical Quality Function Deployment, crisp numbers are used to determine the priorities of the passenger requirements, design requirements, and their relationship matrix to evaluate airport quality. However, vagueness and impreciseness are inevitable uncertainties in those kinds of human judgments, which are generally realized by linguistic terms, and traditional Quality Function Deployment is not associated with “sustainability.” The main contribution of this paper is to present a new approach that integrates Hesitant Fuzzy Stepwise Weight Assessment Ratio Analysis and Hesitant Fuzzy Sustainable Quality Function Deployment method to enhance the sustainable airport quality. Hesitant fuzzy set theory reflects the hesitancy in human nature while making a decision to the fuzzy numbers, compared to other fuzzy set theories, such as traditional fuzzy sets, type-2 fuzzy sets, etc. In this study, the importance degrees of sustainable passenger requirements were evaluated by considering Hesitant Fuzzy Stepwise Weight Assessment Ratio Analysis in the first stage of Hesitant Fuzzy Sustainable Quality Function Deployment method. Then sustainable design requirement was prioritized to develop the sustainable quality management of the airport. Finally, a case study concerning the sustainable development of the airport was used to elucidate the feasibility and rationality of the proposed framework. The results obtained from the case study showed that Hesitant Fuzzy Sustainable Quality Function Deployment could be a practical and structural methodology in the early planning stage of a sustainable airport design.
AtıfScopus68WoS54OpenAlex74İncele - MakaleAçık Erişim2020Normal complex contact metric manifolds admitting a semi symmetric metric connection
Vanli, Aysel Turgut; Ünal, Inan; Özdemir, Dilek
In this paper, we study on normal complex contact metric manifold admitting a semi symmetric metric connection. We obtain curvature properties of a normal complex contact metric manifold admitting a semi symmetric metric connection. We also prove that this type of manifold is not conformal flat, concircular flat, and conharmonic flat. Finally, we examine complex Heisenberg group with the semi symmetric metric connection.
AtıfScopus24WoS25OpenAlex26İncele - MakaleAçık Erişim2020Scopus SJRQ2Bee glue (propolis) improves reproductive organs, sperm quality and histological changes and antioxidant parameters of testis tissues in rats exposed to excess copper
Seven, Ismail; Tatli Seven, Pinar; Gul Baykalir, Burcu; Parlak Ak, Tuba; Ozer Kaya, Seyma; Yaman, Mine
This study was designed to determine the effects of propolis on the sperm quality, antioxidant and histological parameters in the testicular tissues of male Sprague Dawley rats exposed to excessive copper (Cu). In this aim, 24 rats were randomly divided into four groups as follows: the control, Cu, Propolis and Cu+Propolis. When compared to control group, Cu administration significantly decreased sperm motility and concentration, increased total abnormal sperm rate. It caused a significant induction the malondialdehyde (MDA), and reduction the superoxide dismutase (SOD), catalase (CAT) and glutathione (GSH) in testicular tissues. Also, it caused loss, disorganisation and vacuolation of the germinal epithelium, oedema of the interstitial tissues, proliferation of the interstitial cells, spilled immature spermatogenic cells in the lumen of some seminiferous tubules. A large number of active caspase-3-positive stained apoptotic cells and a significant decrease in Johnsen's testicular score were determined. However, significant ameliorations were observed in all sperm characteristics, MDA, SOD, CAT, GSH, seminiferous tubules, number of apoptotic cells and Johnsen's testicular score in Cu+Propolis group. Our results showed that oral supplementation of propolis had curative effect on the sperm quality, antioxidant and histological parameters in the testicular tissues of male Sprague Dawley rats exposed to Cu.
AtıfScopus39OpenAlex39İncele - MakaleAçık Erişim2019Scopus SJRQ4Paenidigyamycin g: 1-acetyl-2,4-dimethyl-3-phenethyl-1H-imidazol-3-ium
Tetevi, Gilbert Mawuli; Kwain, Samuel; Mensah, Thomas; Camas, Anil Sazak; Camas, Mustafa; Dofuor, Aboagye Kwarteng; Azerigyik, Faustus Akankperiwen; Oluwabusola, Emmanuel; Deng, Hai; Jaspars, Marcel
The Ghanaian Paenibacillus sp. DE2SH (GenBank Accession Number: MH091697) is a prolific producer of potent antiparasitic alkaloids. Further detailed study of the culture broth of this strain produced the compound Paenidigyamycin G (1), which is a derivative of the known antiparasitic compound Paenidigyamycin A (2). Compound (1) was isolated on HPLC at tR ≈ 37.5 min and its structure determined by IR, UV, MS, 1D, and 2D-NMR data. Compound 1 produced weak to moderate antileishmanial and antitrypanosomal activity when tested against Leishmania donovani (Laveran and Mesnil) Ross (D10) and Trypanosoma brucei subsp. brucei strain GUTat 3.1 with IC50 = 115.41 and 28.75 µM, respectively. This result is interesting since the parent compound 2 is known to possess consistent and potent antiparasitic activity. However, 1 displayed a promising selectivity profile towards T. brucei subsp. brucei due to its relatively low toxicity against normal mouse macrophages RAW 264.7 cells (SI = 8.70). Given that compound 1 is also the main metabolite found in the hexane fraction of all extracts produced by Paenibacillus sp. DE2SH when it is co-cultured with other bacteria strains, it must possess some unique biological functions which should make it an excellent candidate for further biological activity screening in other bioassays.
AtıfScopus4WoS3OpenAlex4İncele - MakaleAçık Erişim2018Scopus SJRQ3Karyological investigation on seven centaurea L. (Asteraceae) Taxa from Turkey
Tasar, Neslihan; Dogan, Gulden; Kiran, Yasar
The somatic chromosome numbers and karyotypes were examined in seven species of genus Centaurea L. distributed in Turkey. The chromosome numbers were determined as 2n=2x=16 in C. behen L. and C. solstitialis L.; 2n=2x=18 in C. cynarocephala Wagenitz and C. agregata Fisch. & Mey. ex DC. ssp. agregata; 2n=2x=20 in C. iberica Trev. ex Sprengel; 2n=2x=26 in C. balsamita Lam.; 2n=4x=36 in C. virgata Lam. All of the chromosomes had centromeres at median point (M), median region (m), and submedian region (sm). Satellite chromosomes (sat-chromosomes) were observed only in C. virgata. The findings for each of the analyzed taxa are compared each other and with the results of previous studies.
AtıfScopus5WoS3OpenAlex1İncele - Derleme MakaleAçık Erişim2019Scopus SJRQ2Evaluation of X-ray tomography contrast agents: A review of production, protocols, and biological applications
Koç, Mümin Mehmet; Aslan, Naim; Kao, Alexander P.; Barber, Asa H.
X-ray computed tomography is a strong tool that finds many applications both in medical applications and in the investigation of biological and nonbiological samples. In the clinics, X-ray tomography is widely used for diagnostic purposes whose three-dimensional imaging in high resolution helps physicians to obtain detailed image of investigated regions. Researchers in biological sciences and engineering use X-ray tomography because it is a nondestructive method to assess the structure of their samples. In both medical and biological applications, visualization of soft tissues and structures requires special treatment, in which special contrast agents are used. In this detailed report, molecule-based and nanoparticle-based contrast agents used in biological applications to enhance the image quality were compiled and reported. Special contrast agent applications and protocols to enhance the contrast for the biological applications and works to develop nanoparticle contrast agents to enhance the contrast for targeted drug delivery and general imaging applications were also assessed and listed.
AtıfScopus91OpenAlex101İncele - MakaleAçık Erişim2020Scopus SJRQ2Statistical evaluation of the bioremediation performance of Ochrobactrum thiophenivorans and Sphingomonas melonis bacteria on Imidacloprid insecticide in artificial agricultural field
Onder Erguven, Gokhan; Demirci, Ulas
Background: Pesticides are applied directly on the soil or on the vegetation, and thus, they can reach the receiving environment easily. In this way, environmental damage that stems from pesticides also affects public health and the natural habitat. Pesticides are one of the most harmful pollutant groups in terms of human health, fauna and the environment. They penetrate the application field and the applicator right after the application and start to show adverse effects. Methods: The bioremediation of the Imidacloprid (C9H10ClN5O2) insecticide, which is used commonly in Mediterranean climate, was compared with some soil bacteria in artificially prepared fields. For this purpose, firstly, it was determined whether the soil samples taken from a field where cotton was cultivated in Adana in Turkey was suitable for bioremediation. Then, the bacteria were isolated from these soils with the 16sRNA method. The enhanced microbial consortia of these isolated bacteria were inoculated to the artificial fields, meanwhile, the recommended concentrations of Imidacloprid were added to these agricultural fields. Imidacloprid, Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD5) and Total Organic Carbon (TOC) measurements were performed every day for two weeks on the filtrate samples taken from the artificial fields. Results: As a result of the monitoring, it was determined that Ochrobactrum thiophenivorans (Ot) and Sphingomonas melonis (Sm) species and their mixtures could eliminate the Imidacloprid pesticide within two weeks’ time. The removal efficiencies were 100% for active ingredient for each bacterium and their mixtures while COD were 97% and 96% for Ot. and Sm., respectively. TOC and BOD5 removal rates were 97% for both types and their mixtures in one or two-week period. Mixture of Ot and Sm shows 98.5% for COD, BOD5 parameters and 97.5% for TOC parameter. Conclusions: The results that will be obtained will help in the rehabilitation of the receiving environments that are exposed to pesticides in our country and take precautions to avoid the accumulation of pesticides in the body of the humans who are at the top of the food chain.
AtıfScopus23İncele - Kitap BölümüYalnız künye2018Women in the Gülen movement: Life in a postmodern display, enshrined with sacredness
Çobanoğlu, Yavuz
AtıfScopus2İncele - MakaleYalnız künye2019Scopus SJRQ2Intergenerational transmission of traditional practices at newborn care: An explorative study NEWBORN CARE
Baş, Nazan Gürarslan; Karatay, Gülnaz; Arıkan, Duygu; Baş, Kazım
The study was conducted to reveal the cultural practices used in neonatal care as well as revealing the intergenerational transmission of these practices. This comparative and descriptive study was conducted between December 2015 and June 2016. The study sample consisted of 210 mothers, including 130 grandmothers and 80 mothers. Data was collected by the researchers with the face-to-face interviews with the mothers and analyzed by percentile and frequency. It was observed that 77.0% of the grandmothers cover the baby's face with yellow cloth for treating jaundice, 86.2% of them use olive oil for the infantile seborrhoeic dermatitis, 57.8% use breast's milk for thrush, 50.8% use powder to treat diaper rash, and 36.5% use fine-textured soil (höllük) for the treatment of diaper rash. 70.4% of the mothers were covering the baby's face with yellow cloth for treating jaundice, 77.8% were using olive oil for the dandruff (infantile seborrhoeic dermatitis) treatment, 37.8% were using breast's milk for thrush, and 57.7% were using medical cream for the treatment of diaper rash. According to the results of the study, even though the use of non-rational cultural health practices in neonatal care decreases, it is observed that their importance still remains.
AtıfScopus2İncele - MakaleAçık Erişim2018Scopus SJRQ3Experimental investigation of the tensile and impact properties of twill and twill derivative woven fabric reinforced composites
Özdemir, Hakan; Içten, Bülent Murat; Doğan, Akar
In recent years the use of woven composites in structural applications has increased rapidly due to the advantages it offers such as easy handling, dimensional stability, deep drawing shape-ability, enhanced toughness and increased impact resistance. Mechanical properties in textile composites are closely connected with the textile reinforcement's internal structure. This paper reports and discusses a study of the tensile and impact properties of the twill and twill derivative woven fabric reinforced composites. Tensile strength, modulus of elasticity and elongation at break values of the composites were found by tensile tests. In addition impact tests are performed on specimens of woven fabric reinforced composite laminates in order to measure impact strength and characterize damage mechanisms at diverse impact energies. The experimental results reveal that the average float length and weave interlacing coefficient, which are determined by weave pattern, significantly affect the tensile and impact properties of the composites. It is observed that 3/1 twill woven fabric reinforced composite showed the best performance in tensile tests along warp and weft directions. It is also observed that 3/1 twill woven fabric reinforced composite has the lowest impact strengths at the highest deflections; whereas, 3/3 twill woven fabric reinforced composite has the highest impact strengths at the lowest deflections.
AtıfScopus9WoS8OpenAlex9İncele - MakaleYalnız künye2019Scopus SJRQ2Silver/Selenium/Chitosan-doped Hydroxyapatite coatings on biological NiTi alloy: In vitro biodegradation analysis
Say, Y.; Aksakal, B.
Abstract: Nitinol (NiTi) substrates were bioceramic coated by single layer Hydroxyapatite (HA), double layer HA/Silver (Ag) and double-layered HA/Selenium (Se)–Chitosan (Cht) substitutions by sol–gel method. Surface morphologies and adhesion strengths of the obtained coatings were characterized by means of SEM, EDX, XRD, and adhesion tests. Crack-free coatings were obtained in single layer-HA (S1), double layer HA/Ag (S2), and double-layered HA/Selenium–Cht (S3) coatings on NiTi alloys executed via the sol–gel method. Degradation behavior was analyzed in via simulated body fluid (SBF) environment by means of weight loss (%) and ion release rates for 1–4 weeks of immersion periods. The degraded coating particles were measured and metallic ions were detected quantitatively by an inductively coupled plasma–mass spectrometer (ICP–MS). The results show that such coatings could minimize and/or prevent the degradation of metallic ions and weight loss (%) from the coated substrates. From the overall results, HA/Ag double layer biocomposite (S2)-coated NiTi substrates revealed the highest adhesion strength and lowest weight loss and degradation. It was also shown in all groups that the Ni ion release from the NiTi substrates was prevented by the coatings. [Figure not available: see fulltext.].
AtıfScopus10WoS9OpenAlex11İncele - MakaleYalnız künye2020Scopus SJRQ1Effect of BaO on lead free zinc barium tellurite glass for radiation shielding materials in nuclear application
Boonin, K.; Yasaka, P.; Limkitjaroenporn, P.; Rajaramakrishna, R.; Askin, A.; Sayyed, M.I.; Kothan, S.; Kaewkhao, J.
In this study, the zinc barium tellurite glasses (ZBaT) synthesized and inspected their radiation defensive mechanism and structural behavior. Glass composition (90-x) TeO2 - 10 ZnO - xBaO, where 25≤ x ≤ 35 (mol%) was prepared using the melt quenching technique and glass-forming pseudo-ternary diagram was discussed. Addition of BaO enhances the polarization in the present glasses there by it increases the bond length hence glass network expands resulting in volume. The mass attenuation coefficient (μm) of ZBaT glasses have been evaluated at various energies via Compton scattering technique. The results found that the μm, effective atomic number and effective electron density decrease with the increase in γ-ray energies which is in a good agreement with theoretical values attained using Geant4 and WinXCOM. At 25 mol% BaO content the glass samples show less mean free path (MFP) which were compared with other standard shield defensive materials. The obtained results reveal that the formation of non-bridging oxygens increased with higher concentration of BaO. The transmission spectra of the prepared glasses displayed optical light transparency thereby demonstrating their efficient role being transparent window when used as radiation defensive material without Pb component proving them as eco-friendly for environment.
AtıfScopus80OpenAlex83İncele - MakaleYalnız künye2019Scopus SJRQ2Structural, optical, and gamma-ray-sensing characterization of (35 − x) PbO–10 MgO–10Na2O–5 Fe2O3–10 BaO–(30 − x) B2O3 glasses
Kumar, Ashok; Ali, Atif Mossad; Sayyed, M.I.; Aşkın, A.; Rashad, M.; Algarni, H.
Amorphous PbO–MgO–Na2O–Fe2O3–BaO–B2O3 glass system has been prepared. FTIR spectra studied in the range of 400–1600 cm−1 which gives information regarding the different structural, vibration bonds. To study the various optical parameters, the UV absorption spectra are studied in the range 190–1100 nm. The photon attenuation characteristics for the current samples were studied using Geant4 simulation code. The transmission fraction (T) was calculated and the results showed that the addition of PbO decreases the values of T. For the samples which contain 55 mol% and 35 mol% of PbO, the T values are, respectively, 0.065 and 0.161 at 356 keV. High atomic number and high of lead result in lower half-value layer values for Pb55B10 glass compared to the Pb35B30 sample which has the lowest amount of Pb in its structure. At 356 keV, the tenth value layer values are 2.521 and 1.685 cm for the samples coded as Pb35B30 and Pb55B10, respectively. From the radiation-shielding parameter results, the use of high-density glasses against the penetrating gamma rays provides a better shielding performance using thinner glass layer.
AtıfScopus17OpenAlex16İncele - MakaleAçık Erişim2018Scopus SJRQ2Dark, bright and other soliton solutions to the Heisenberg ferromagnetic spin chain equation
Bulut, Hasan; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet
In this study, the applications of the extended sinh-Gordon equation expansion method to a nonlinear Schrödinger equation that describes the nonlinear spin dynamics of (2 + 1)-dimensional Heisenberg ferromagnetic spin chains with bilinear and anisotropic interactions in the semiclassical limit is presented. We successfully construct dark, bright, combined dark-bright, singular and combined singular soliton solutions to this equation. We give the parametric conditions for the existence of valid soliton to each of the obtained solutions. We plot the 2D and 3D graphics to some of the obtained solutions. The reported results of this study may be helpful in explaining the physical meaning of the studied model.
AtıfScopus40WoS59OpenAlex73İncele - MakaleAçık Erişim2020Scopus SJRQ1Automated detection of COVID-19 cases using deep neural networks with X-ray images
Ozturk, Tulin; Talo, Muhammed; Yildirim, Eylul Azra; Baloglu, Ulas Baran; Yildirim, Ozal; Rajendra Acharya, U.
The novel coronavirus 2019 (COVID-2019), which first appeared in Wuhan city of China in December 2019, spread rapidly around the world and became a pandemic. It has caused a devastating effect on both daily lives, public health, and the global economy. It is critical to detect the positive cases as early as possible so as to prevent the further spread of this epidemic and to quickly treat affected patients. The need for auxiliary diagnostic tools has increased as there are no accurate automated toolkits available. Recent findings obtained using radiology imaging techniques suggest that such images contain salient information about the COVID-19 virus. Application of advanced artificial intelligence (AI) techniques coupled with radiological imaging can be helpful for the accurate detection of this disease, and can also be assistive to overcome the problem of a lack of specialized physicians in remote villages. In this study, a new model for automatic COVID-19 detection using raw chest X-ray images is presented. The proposed model is developed to provide accurate diagnostics for binary classification (COVID vs. No-Findings) and multi-class classification (COVID vs. No-Findings vs. Pneumonia). Our model produced a classification accuracy of 98.08% for binary classes and 87.02% for multi-class cases. The DarkNet model was used in our study as a classifier for the you only look once (YOLO) real time object detection system. We implemented 17 convolutional layers and introduced different filtering on each layer. Our model (available at (https://github.com/muhammedtalo/COVID-19)) can be employed to assist radiologists in validating their initial screening, and can also be employed via cloud to immediately screen patients.
AtıfScopus2286OpenAlex2595İncele - MakaleAçık Erişim2020Scopus SJRQ3Effects of technology usage on the addictive behaviors of secondary school students
Gürarslan Baş, Nazan; Karatay, Gülnaz
Purpose: This study aimed to evaluate the relationship between technology usage and technology addiction among secondary school students. Design and Methods: This descriptive research was conducted in April 2018 with 840 students in Eastern Turkey. Findings: The average Internet and digital-gaming addiction scores of the participating students were found to be significantly higher among those who used computers, smartphones, and tablets daily and for long periods of time. Implications for Practice: Using technological devices regularly and for long periods of time increases the level of Internet and digital-gaming addiction. Thus, it is important to increase students' awareness of the need to use technological devices appropriately.
AtıfScopus13WoS11OpenAlex19İncele - MakaleYayıncıda açık erişim2018Scopus SJRQ3The effects of common yarrow (Achillea millefolium Linnaeus), cinnamon (Cinnamomum zeylanicum Blume) and rosemary (Rosemarinus officinalis Linnaeus) hydrosols on the some immunological and hematological parameters of common carp (Cyprinus carpio L., 1758) against to Yersinia ruckeri
Altinterim, Basar; Danabas, Durali; Aksu, Onder
In this study, the effects of some plant hydrosols (distilled plant waters) based upon some hematological parameters and Nitroblue Tetrazolium (NBT) activities in the common carp (Cyprinus carpio Linnaeus, 1758) infected with Yersinia ruckeri were investigated. In the trial, it was utilized totally 200 common carps with 54.3±6.7 g mean live weight and 15.7±1.8 cm mean total lenght. The 10% rate of the common yarrow (Achillea millefolium Linnaeus) hydrosol; 0.5% rate of the cinnamon (Cinnamomum zeylanicum Blume) hydrosol; and 5% rate of the rosemary (Rosemarinus officinalis Linnaeus) hydrosol were applied to fish as a bath treatment. The erythrocyte (RBC), leukocyte count (WBC), hematocrit value (HCT), haemoglobin amount (Hg), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH), mean corpuscular haemoglobin concentration (MCHC), and activities of NBT in the blood samples taken from the caudal vena of the control and experimental fish groups were analyzed in the 7 th , 14 th , and 21 st days of the exposure treatment. At the end of the research, HCT, Hg, RBC, WBC, MCH and MCV values decreased in the C-2 Group (the control group contain pathogen) compared to the C-1 Group (the control group no contain pathogen), except MCHC value. The NBT activities in the C-1 Groups increased at the 14 th day, but decreased quite a few at the 21 st day. It has been consequently reached the conclusion that the bath treatments of the some plant hydrosols might be beneficial in increasing of antibacterial properties and in strengthening of defense mechanisms of common carp against Y. ruckeri pathogen.
AtıfScopus4WoS4OpenAlex8İncele - MakaleYalnız künye2019Scopus SJRQ2Experimental damage evaluation of prototype infill wall based on forced vibration test
Onat, Onur
This paper aims to investigate vibration frequency decrease (vibration period elongation) of reinforced concrete (RC) structure with unreinforced infill wall and reinforced infill wall exposed to progressively increased artificial earthquake load on shaking table. For this purpose, two shaking table experiments were selected as a case study. Shaking table experiments were carried on 1:1 scaled prototype one bay one storey RC structure with infill walls. The purpose of this shaking table experiment sequence is to assess local behavior and progressive collapse mechanism. Frequency decrease and eigen-vector evolution are directly related to in-plane and out-of-plane bearing capacities of infill wall enclosure with reinforced concrete frame. Firstly, frequency decrease-damage relationship was evaluated on the base of experiment results. Then, frequency decrease and stiffness degradation were evaluated with applied Peak Ground Acceleration (PGA) by considering strength deterioration. Lastly, eigenvector evolution-local damage and eigenvector evolution-frequency decrease relationship was investigated. Five modes were considered while evaluating damage and frequency decrease of the tested specimens. The relationship between frequency decrease, stiffness degradation and damage level were presented while comparing with Unreinforced Brick Infill (URB) and Reinforced Infill wall with Bed Joint Reinforcement (BJR) on the base of natural vibration frequency.
AtıfScopus14WoS12OpenAlex9İncele
