Koleksiyon/r/munzur/2

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Koleksiyondaki öğeler

  • MakaleAçık Erişim2019Scopus SJRQ2
    The epiphytic bryophyte vegetation of Kamilet Valley (Artvin, Turkey)

    Alataş, Mevlüt; Batan, Nevzat; Ezer, Tülay

    In this study, the vegetation of epiphytic bryophytes in the Kamilet Valley and its surroundings (Arhavi, Artvin) was investigated. The study area is located within the borders of the Eastern Black Sea Mountains and is one of the 122 important plant areas in Turkey. The investigation of epiphytic bryophyte communities was carried out in 2016 during different vegetation periods according to Braun-Blanquet’s phytosociological methodology. Phytosociological data obtained from 65 relevés were ordinated using detrended correspondence analysis (DECORANA) and classified using two-way indicator species analysis (TWINSPAN). Consequently, six epiphytic bryophyte communities new to Turkey were determined with TWINSPAN and DECORANA: Leucobryo-Tetraphidetum pellucidae, Anomodonto attenuati-Neckeretum crispae, Frullanio tamarisci-Exsertothecetum crispae, Ulotetum crispae, Anomodonto attenuati-Neckeretum crispae-leucodontetosum sciuroidis, and Ulotetum crispae-isothecietosum alopecuroidis. All syntaxa are presented by analyzing them in terms of their ecological and floristic classifications.

    • SDG 15 · Karasal Yaşam
    AtıfScopus10WoS9OpenAlex16TR Dizin10
    ScopusWeb of ScienceTR Dizinİncele
  • MakaleAçık Erişim2020Scopus SJRQ1
    Optimization of tetracycline removal with chitosan obtained from mussel shells using RSM

    Topal, Murat; Arslan Topal, E. Işıl

    In this study, the removal of tetracycline from aqueous solutions with chitosan obtained from mussel shells was optimized and investigated using responce surface methodology. For this aim, the central composite design was used to optimize the four variable factors (sorbent dosage (0.4–1.0 g), time (20−60 min), temparature (10−30 °C) and initial TC concentration (50−100 mg/L)) for the removal of TC from aqueous solutions by chitosan obtained from mussel shells. According to the RSM analysis results, optimum conditions for maximum TC removal efficiency were determined as 90.5 mg/L for initial TC concentration, 35.9 min for time, 29.9 °C for temperature and 0.4 g for sorbent dosage. It was observed that the tetracycline was crystallized on mussel shells. According to the results of XRD after adsorption, the content of mussel shells were observed as 60% calcite, 5.6% overite, 9.4% aragonite and calcium hydroxide 25%, respectively. As a result, experiments showed that chitosan obtained from mussel shells were a good adsorbant for tetracycline removal from aqueous solutions.

    • SDG 6 · Temiz Su ve Sanitasyon
    • SDG 12 · Sorumlu Üretim ve Tüketim
    AtıfScopus53WoS52OpenAlex53
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ2
    Design and development of travelling-wave-frequency-based transmission line fault locator using TMS320 DSP

    Arkan, Müslüm; Akmaz, Düzgün; Mamiş, Mehmet S.; Tağluk, Mehmet Emin

    The authors use a TMS320 digital signal processor (TMS320-DSP) to determine fault instants and estimate their location in real time in a laboratory environment. The fault instant is determined via examining the instantaneous differential changes in the line currents. After the fault is detected, the fault location is determined by processing the time-domain transient current waves. First, the travelling-wave frequency is determined by application of the fast Fourier transform to the positive-sequence-component line current after the fault, and subsequently, the fault location is estimated by utilising this frequency. The alternative transients programme (ATP)–electromagnetic transient programme is used to simulate the line currents and create short-circuit fault conditions. Furthermore, LabVIEW software and a National Instruments data acquisition board are used to transform the line currents obtained through the ATP programme into analogue signals. The TMS320-DSP determines the fault in real time and estimates the fault location using the completed software and analogue input signals. Their results indicate that the prototype device designed with the use of the TMS320-DSP is suitable for real-time fault detection.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus16WoS16OpenAlex16
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019Scopus SJRQ4
    Modeling approach with Box-Behnken design for optimization of Pb bioaccumulation parameters in Gammarus pulex (L., 1758)

    Pala, Aysegul; Serdar, Osman; Ince, Muharrem; Onal, Ali

    The aim of this research was to evaluate the suitability of Gammarus pulex (L., 1758), an amphipod crustacean, as a bio-monitor for lead (Pb). A Box– Behnken experimental approach combined with response surface modeling (RSM) and quadratic programming was employed to increase the knowledge about Pb2+ bioaccumulation in Gammarus pulex (L., 1758). Independent variables, such as temperature ranging from 18 to 22 ºC, contact time from 8 to 48 hours, and Pb2+ ion solution concentrations from 50 to 100 µg L-1, were studied and tested using analysis of variance (ANOVA). The standardized effects of the independent variables and their interactions on the dependent variable were also investigated according to a Pareto chart. The selected variables' optimum values were obtained by solving the quadratic regression model along with analyzing the response surface contour plots. Optimum experimental conditions were obtained at 22.0 ºC, contact time of 8 hours, and Pb concentration at 69.5 µg L-1. Based on the Box-Behnken design, the applied model is significant because the model F-value and R2 were obtained at 77.80 and 0.9901, respectively. Bioaccumulation of Pb was determined using electrothermal atomic absorption spectrometry (ETAAS). The obtained data suggest that G. pulex can be used as a Pb biomonitor.

    AtıfScopus4WoS6OpenAlex6
    ScopusWeb of Scienceİncele
  • BildiriAçık Erişim2019
    A Hybrid recommendation system in co-Authorship networks

    Aslan, Serpil; Kaya, Mehmet

    Recommender systems are an important field that aim to direct users more quickly to their needs. Scientific research studies in academic field are mostly carried out by collaboration between scientists. Finding new collaborations and analyzing the quality of them are quite complicated situations. Therefore, developing a system that recommend strong collaborations for scientists can be an invaluable tool. In this study, we present a hybrid recommendation method that uses both collaborative filtering and a network-based method by examining the structure of the co-Authorship network that was created by using a real database of scientific articles in computer science. In the constructed network, the nodes represent scientists and links represent the coauthorship relationships. If two scientists in the network have been co-Author of at least one article, they are considered to be connected. Many of the present recommendation methods in this area take into account only the common neighbors of the nodes, while calculating the similarity of the node pairs in the network. To overcome these limited methods, we use the local community-based similarity indexes which also take into account the similarities between the common neighbors of the nodes. When the experimental results are examined, they prove the success of the proposed method.

    AtıfScopus7WoS3OpenAlex6
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2020Scopus SJRQ1
    ENHANCEMENT OF THE PERFORMANCE OF SOUR CHERRY JUICE CONCENTRATION PROCESS IN VACUUM EVAPORATOR BY ASSISTING OHMIC HEATING SOURCE

    Sabanci, Serdal; Icier, Filiz

    Sour cherry juice was concentrated to 65% TSS content by using ohmic heating assisted vacuum evaporation (OVE) at voltage gradients (10, 12, 14 V/cm) and vacuum evaporation (VE). The change of performance efficiencies (energy/exergy) of OVE process depending on the voltage gradient applied and the increase in TSS content during the process were investigated by taking into account of both process and system boundaries, and compared with those of VE process. During this process, total energy consumption decreased as the voltage gradient increased, but it increased as TSS content increased. System boundary based efficiencies were lower than process based ones. Maximum efficiency was obtained for 14 V/cm. Improvement potential values increased as TSS content increased but the voltage gradient increased. The assistance of ohmic heating to VE increased the performance of the evaporation process in terms of energy and exergy efficiencies, and decreased the improvement requirements of the system.

    • SDG 2 · Açlığa Son
    • SDG 7 · Erişilebilir ve Temiz Enerji
    AtıfScopus31WoS24OpenAlex31
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ1
    Fabrication, characterization of poly(MA-co-NIPA)-graphene composites and optimization the dielectric properties using the response surface method (RSM)

    Torğut, Gülben

    Poly(Maleic anhydride-N-isopropyl acrylamide poly(MA-co-NIPA) copolymer was synthesized by Free radical polymerization method. Response surface methodology (RSM) was used for optimizing the dielectric constant (έ) and dielectric loss factor (ε՛՛). The aim of this study is to determine the quantitative relationship between selected parameters (frequency, applied voltage and graphene content) at room temperature. The importance of process parameters in the model is assessed by analysis of variance (ANOVA) investigation. Our results show that, with increasing the frequency the έ and ε՛՛ of the polymers decreases, whereas voltage has no significant effect on έ and ε՛՛ of the composites. With the incorporation of graphene into poly(MA-co-NIPA) the έ and ε՛՛ considerably increased by 244% and 387% respectively. The model predicted the maximum value of the έ (13) when the frequency was set at 4506, the voltage was set at 1.45, and the graphene content was set at 14.97 wt%. Also, the RSM indicated that maximum ε՛՛ (1969) was achieved at the frequency of 512, at the voltage of 20.44, and at the graphene content of 14.76 wt%. The morphology of composites was investigated by scanning electron microscopy (SEM). SEM results demonstrated that the poly(MA-co-NIPA)-graphene composites has interconnected and they form different morphologies with the increase of GNs content. ATR tests showed that no significant change in chemical bond and crystallization is found in composites.

    AtıfScopus16WoS17OpenAlex21
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2020Scopus SJRQ4
    Metal bioaccumulation in selected tissues of barb (Barbus sp.) and common carp (Cyprinus carpio, Linnaeus 1758) from the Keban Dam Lake, Turkey

    Danabas, Durali; Kutluyer, Filiz; Ural, Mesut; Kocabaş, Mehmet

    The aquatic life has been negatively influenced by harmful effects of environmental toxic elements, including heavy metals. The elevated concentrations of metals may be harmful for aquatic animals and human health. Herein, the present study deals with assessment of the bioavailability of metals [cadmium (Cd), chrome (Cr), copper (Cu), zinc (Zn), iron (Fe), lead (Pb), manganese (Mn), mercury (Hg), nickel (Ni), and selenium (Se)] in organs such as muscle, gills, liver, kidney, and gonad of the commercially consumed Barbus sp. and Cyprinus carpio (Linnaeus, 1758) collected from Keban Dam Lake, eastern Turkey. The fish were captured from four different stations of Keban Dam Lake. Our results indicated that Fe and Zn concentrations were the highest in all tissues of two fish species while Cd concentrations were the lowest levels. In addition, detected metals accumulated in the muscle of common carp at higher levels compared to Barbus sp. The results from the present study also demonstrated significant variations and considerable differences in the concentrations of all 10 elements between the four stations and different fish tissues. Overall, the concentrations of detected metals in the muscle were many folds higher than the permissible level prescribed by some national and international legislation, which raises health risk concerns.

    • SDG 6 · Temiz Su ve Sanitasyon
    AtıfScopus11WoS9OpenAlex14
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2020Scopus SJRQ3
    An ethnobotanical field study; traditional foods production and medicinal utilization of gundelia l. Species in tunceli (turkey)

    Çakılcıoğlu, U.

    This article gives important ethnobotanical information about Gundelia L. (Kenger) in Tunceli (Eastern Anatolia Region-Turkey). Traditional use of three newly discovered species of Kenger (G. vitekii, G. dersim, G. munzuriensis) in and around Tunceli, as well as Gundelia glabra Miller, has been investigated. A field study had been carried out for a period of approximately two years (2015–2016). During this period, 27 Gundelia L. species were collected. Nine different traditional uses of Kenger plant as food were recorded. Local people use Kenger plant as egg meal with olive oil, watery food with rice, food with garlic yogurt, salad, pickle, gum, coffee, snack and animal feed. Since the plants are newly discovered, the first literature records have been made by us.

    AtıfScopus28
    Scopusİncele
  • MakaleAçık Erişim2018Scopus SJRQ3
    A fuzzy dematel model proposal for the cause and effect of the fault occurring in the auxiliary systems of the ships' main engine

    Balin, A.; Demirel, H.; Celik, E.; Alarcin, F.

    The ship engine room has a structure that meets a number of needs related to administrative conditions. Even if a simple mechanical error is considered to be the addition of human errors into the complex structure of the engine room, it can lead to undetected loss. How the causes and effects of the detected faults affect the system is as important as an effective fault detection system to detect the fault and take immediate action against any possible engine failure. This study reveals the causes of problems occurring in the main engine auxiliary systems including cooling, lubricating, cooling oil and fuel systems, and the extent of these problems affecting the system. While the Decision Making Trial and Evaluation Laboratory supports to identify and analyze the error detection of auxiliary systems with respect to causal effect relation diagram, fuzzy sets deal with the uncertainty in decision-making and human judgements through the DEMATEL. Therefore, fuzzy DEMATEL approach is applied to examine the causes and the weights of the faults and their relation to each other in the auxiliary systems. When we look at the result of the proposed approach, fuel oil pump failures has more impact on the all system and air cooler problems has the second highest place among the all errors.

    AtıfScopus7WoS4OpenAlex8
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2018Scopus SJRQ2
    Comparison of Some Soil Fungi in Bioremediation of Herbicide Acetochlor Under Agitated Culture Media

    Erguven, Gokhan Onder

    In this study, we aimed to find out the biodegradation efficiency of some soil fungi types on herbicide acetochlor with acetochlor active material, chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC) parameters. We also try to determine the population dynamics of these fungi via turbidity. The fungi cultures were isolated from agricultural field in in Thrace region of Turkey. Each fungi enriched in malt extract broth media and 1 mL of these enriched media was inoculated into 100 mL of acetochlor solutions that suggested for using application concantrations in agricultural field for farmers (11000 mg L−1) for sunflower and corn agriculture. Bioremediation results of acetochlor have shown different results according to the types of fungi. Our results indicate that Tolypocladium geodes and Cordyceps cicadae might be used in acetochlor bioremediation with a significant acetochlor, COD, TOC and BOD5 reduction and can be used for rehabilitation of agricultural fields or receiving environments for removal the opposite effects of acetochlor or other herbicides.

    • SDG 2 · Açlığa Son
    • SDG 6 · Temiz Su ve Sanitasyon
    • SDG 12 · Sorumlu Üretim ve Tüketim
    • SDG 15 · Karasal Yaşam
    AtıfScopus37WoS26OpenAlex36
    ScopusWeb of SciencePubMedİncele
  • MakaleYalnız künye2018Scopus SJRQ2
    Solutions of partial differential equations using the fractional operator involving Mittag-Leffler kernel

    Yavuz, Mehmet; Ozdemir, Necati; Baskonus, Haci Mehmet

    In this paper, time-fractional partial differential equations (FPDEs) involving singular and non-singular kernel are considered. We have obtained the approximate analytical solution for linear and nonlinear FPDEs using the Laplace perturbation method (LPM) defined with the Liouville-Caputo (LC) and Atangana-Baleanu (AB) fractional operators. The AB fractional derivative is defined with the Mittag-Leffler function and has all the properties of a classical fractional derivative. In addition, the AB operator is crucial when utilizing the Laplace transform (LT) to get solutions of some illustrative problems with initial condition. We show that the mentioned method is a rather effective and powerful technique for solving FPDEs. Besides, we show the solution graphs for different values of fractional order α, distance term x and time value t. The classical integer-order features are fully recovered if α is equal to 1.

    AtıfScopus115WoS106OpenAlex131
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2018Scopus SJRQ3
    In vitro effect of L-tryptophan on the quality and fertilizing capacity of sperms of endangered species of trouts

    Kutluyer, Filiz

    The present study was focused on determining the effect of L-tryptophan on quality of sperm and its fertilizing capacity in endangered trout Salmo coruhensis, Anatolian trout Salmo rizeensis and rainbow trout Oncorhynchus mykiss. Different activation media (NaCl, 0.3%; NaHCO3, 1%) were supplemented with L-tryptophan [Control (0), 0.5, 1, 2, 3, 4 and 5 mM] for assessing sperm motility and its duration, fertility and hatching rate of eggs. The results from the present study indicated that addition of L-tryptophan increased the motility rate and duration in O. mykiss, S. rizeensis and S. coruhensis compared to control group. Highest sperm motility rate and its duration, and fertility and hatching rate of eggs of O. mykiss, S. rizeensis and S. coruhensis were 0.5 mM, 5 mM and 2 mM, respectively. To conclude, sperm quality and fertility were positively affected by quantitative changes different concentrations of L-tryptophan. In addition, L-tryptophan can be used in activation medium for O. mykiss, S. rizeensis and S. coruhensis. Copyright 2018 Zoological Society of Pakistan.

    • SDG 2 · Açlığa Son
    AtıfScopus12WoS12OpenAlex10
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2020Scopus SJRQ4
    Investigation of curcumin role on doxorubicin-induced tissue damage in terms of trace metal levels using etaas

    Ince, Olcay Kaplan; Kandemir, Fatih Mehmet; Ince, Muharrem; Benzer, Fulya; Onal, Ali; Kucukler, Sefa

    Doxorubicin (DXR) is one of the commonly used chemotherapeutic agents, which is highly toxic and causes gastrointestinal and cardiac toxicity. Curcumin is used as a spice and coloring agent in food, but also possesses anti-proliferating, potent antioxidant, antitumor-promoting and anti-carcinogenic properties in vitro and in vivo. In this study, the change in element concentrations in the tissues of healthy animals was examined by administering doxorubicin and curcumin separately, or both at the same time. For this purpose, 35 wistar albino male rats were selected and randomly divided into five groups of seven each. The objective of this study was to assess and compare the levels of copper, iron, zinc and selenium in the liver, kidney, heart, and testis of the control group and in the doxorubicin-induced tissues. According to the results, the Cu, Fe, Zn, Se amounts and the Cu/Fe, Cu/Zn, and Cu/Se ratios were present at different levels in each of the five groups. In terms of element concentration, the most affected tissue by doxorubicin application is the heart, and the least affected is the kidney. The ratios of Cu/Fe and Cu/Se in the liver and the heart were highest in Group II and Group III, respectively.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfScopus2WoS2OpenAlex2
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019Scopus SJRQ3
    Effect of the organophosphate insecticide chlorpyrifos exposure on oxidative stress and quality of Salmo coruhensis spermatozoa

    Kutluyer, Filiz; Kocabaş, Mehmet; Erişir, Mine; Benzer, Fulya

    The use of pesticides has been increasing along with increasing farming activities and has caused deleterious environmental impacts. Non-target organisms in particular, including fish, are affected by pesticides. In this work, the impacts of Chlorpyrifos (CPF) on sperm oxidative stress markers and sperm motility were investigated in vitro. CPF concentrations were 0 μg/L (control), 5 μg/L, 10 μg/L and 15 μg/L. Lipid peroxidation [malondialdehyde (MDA)], nonenzymatic antioxidants [glutathione (GSH)] and enzymatic [superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT)] activities in sperm cells were examined for the determination of oxidative stress status. Our findings showed that motility and survival of sperm cells significantly decreased with exposure to Chlorpyrifos. Biochemical assays revealed that CAT activity and levels of MDA and, GSH increased in spermatozoa based on CPF concentration while activity of GSH-Px and SOD decreased. Consequently, spermatozoa were highly sensitive to CPF exposure. It can be deduced that CPF has the potential to disrupt sperm quality and to cause to oxidative stress in sperm cells of S. coruhensis.

    • SDG 2 · Açlığa Son
    • SDG 3 · Sağlık ve Kaliteli Yaşam
    AtıfScopus15WoS14OpenAlex13
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2019Scopus SJRQ1
    Research of thermal performance by metallographic investigation of stator winding solder region in hydroelectric power plants

    Kahraman, Gökhan; Taşgın, Yahya

    Hydroelectric power plants are the most widely used renewable energy sources all over the world. In these plants, many studies have been conducted in order to produce energy continuously and efficiently. Among these studies, predictive maintenance methods, efforts to increase power by improving cooling conditions, and improving efficiency by improving the turbine wheel. In this paper, soldering at the junctions of the stator windings in the central generators has been investigated. Traditional solder (Cu–Zn) materials and silver alloy solders (Ag-Cu-Zn) have been investigated in terms of thermal and metallographic. Silver alloy soldering has been found to have lower electrical conductivity than conventional soldering. The winding temperatures measured on the generating generator show that silver alloy soldering is more efficient. Reducing the stator winding temperature in hydroelectric power plants allows more energy production and also reduces costs by preventing winding failures.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus2WoS2OpenAlex2
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2018Scopus SJRQ2
    Dissemination of heavy-metal contamination in surface sediments of the Uzunçayır Dam Lake, Tunceli, Turkey

    Kutlu, Banu

    The objective of this study was to determine the heavy-metal concentrations (Cu, Pb, Zn, Ni, Mn, Fe, As, Cd, Cr, and Hg), evaluate the pollution levels, and determine the concentration of chlorophyll-a and organic carbon in the surface sediments of the Uzunçayır Dam Lake, Tunceli, Turkey, between 2015 and 2016. In order to evaluate the effect of the pollution level in the study area, the contamination factor (CF), enrichment factor, potential ecological risk index, and pollution load index were used. The concentrations of the studied heavy metals were ordered as follows: Fe > Mn > Ni > Cr > Zn > Cu > Pb > As > Cd > Hg. The highest CF value was found for the Ni element among the studied heavy metals in the Dam Lake. Moreover, the highest CF mean value was found for the As contamination level. According to the toxicity analyses in the study area, the potential toxic effect of sediments was not at a very serious level.

    • SDG 6 · Temiz Su ve Sanitasyon
    AtıfScopus12WoS14OpenAlex14
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2019Scopus SJRQ1
    An investigation on physical, structural and gamma ray shielding features of Dy3+ ions doped Telluroborate glasses

    Sathiyapriya, G.; Marimuthu, K.; Sayyed, M.I.; Askin, A.; Agar, O.

    Structural, physical and gamma ray shielding properties of Dy3+ doped telluroborate glasses have been discussed. The molar volume of the glasses is proportional to the TeO2 content. The FTIR studies investigate the expansion of TeO2 content and the dynamic change of tetrahedral [BO4] units into trigonal [BO3] units. Using the absorption spectra, optical band gap (Eg) and Urbach's energy (ΔE) values are calculated. The molar volume of oxygen (VO) and boron‑boron separation (<dB–B>) values are increasing while there is a fall in oxygen packing density (OPD) from 0% to 40% of TeO2. The ionic nature of the present glasses is analyzed from the bonding parameter (δ), optical basicity (Λth), covalent and ionic characteristic factors. The gamma photon attenuation investigated employing GEANT4 code. The transmission factor (TF) shows that 0TBD sample (0 wt% of TeO2) has the highest TF, while the 4TBD sample (40 wt% of TeO2) has the lowest TF.

    AtıfScopus42
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  • MakaleYalnız künye2018Scopus SJRQ1
    Effects of salicylic acid and organic selenium on wheat (Triticum aestivum L.) exposed to fenoxaprop-p-ethyl

    Akbulut, Gulcin Beker; Yigit, Emel; Kaya, Armagan; Aktas, Aydın

    In this study, we evaluated effects of fenoxaprop-p-ethyl herbicide on wheat (Triticum aestivum L.). The wheat plants were grown in pots containing perlite. Fenoxaprop-p-ethyl was applied to adequately grown T. aestivum plants at determined doses (1 mM, 1.5 mM, 2.2 mM, 3.4 mM and 5.1 mM) via spraying. The effects of this herbicide on some antioxidant enzymes, lipid peroxidation, carotenoid, total chlorophyll and total phenolic were investigated on days 1, 5 and 10 following the application. Environmental pollutants cause oxidative stress, production of free radicals and changes in antioxidants. Synthesis of signal molecules such as salicylic acid (SA) is important for the stress response of plants. In addition to this, although selenium is known not to be an obligatory element for plants, low dose selenium has positive effects on the plant growth. We also investigated the effects that are elicited on parameters above mentioned by the treatment of exogenous 0.5 mM SA and 0.004 mM organic selenium (SeI) separately. Our findings reveal that SA and SeI, which are externally applied before the germination of seeds that are exposed to herbicide stress, becomes effective in reduction of the negative effects of fenoxaprop-p-ethyl, with regard to antioxidant system, lipid peroxidation, pigment system and total phenolic. When we evaluate the study results, our findings suggest that especially SA plays a protective role on wheat against herbicide stress.

    • SDG 2 · Açlığa Son
    AtıfScopus21WoS19OpenAlex24
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2018Scopus SJRQ1
    Transmission line fault location using traveling wave frequencies and extreme learning machine

    Akmaz, Düzgün; Mamiş, Mehmet Salih; Arkan, Müslüm; Tağluk, Mehmet Emin

    In this research, a new approach was proposed for determining the fault location in transmission lines. Traveling wave frequencies and an extreme learning machine (ELM) were used to determine fault location. Transient signals in the time domain were transformed to the frequency domain using the fast Fourier transform (FFT) and the traveling wave frequencies were detected from the transient frequency spectrum. In order to detect the location of fault, traveling wave frequency was used initially to predict the fault location. The prediction of this fault location was tested for many different fault conditions and was found to be adversely affected by only the source inductance value. This is due to the negative effect of source inductance on wave velocity. Regression feature of ELM was used in order to improve the prediction of fault location and to minimize the negative effect of source inductance. For ELM regression training, values of the fault distance estimated from the traveling-wave frequencies and the source inductance values were used as ELM input data, and the actual distance values were used as ELM output data. After ELM regression training, ELM predicted a new fault location using the input data. The Alternative Transients Program (ATP/EMTP) was used to model J. Marti frequency dependent line model, and the MATLAB program was used to perform fault-detection algorithms. Simulation results show that the proposed method is very successful against many variables such as different fault resistances, source inductances, transmission line characteristics, transmission line lengths.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    AtıfScopus104WoS74OpenAlex101
    ScopusWeb of Scienceİncele