Yayınlar
Koleksiyondaki öğeler
- BildiriAçık Erişim2012Scopus SJRQ2The effect of initial glucose concentration and of inducer addition on the production lipase by Pseudomonas fluorescens
Tanyol, Mehtap; Uslu, Gulsad
- MakaleAçık Erişim2012Scopus SJRQ2A computer-aided educational tool for induction motors
Gencer, Cetin; Gedikpinar, Mehmet
The computer-aided educational tools have gained popularity in the last years with successful implementation in many areas, including in engineering education. These tools are aimed to help the students for visualization of the concepts and to provide the graphical feedback during the learning process. This paper presents a computer-aided educational tool for induction motors, which is a part of laboratories in the electrical machinery courses. This tool helps to students and educators in subject to teaching/of the equivalent circuit, and the vector/phasor diagrams in induction motors. The tool software was prepared in DELPHI environment. It has flexible structure which is enable to users to change motor label values, and to solve equivalent circuit parameters and winding account. The proposed educational tool was utilized in laboratories of electric machinery courses and well received by students. (c) 2010 Wiley Periodicals, Inc. Comput Appl Eng Educ 20: 503509, 2012
AtıfWoS12OpenAlex14
İncele - MakaleAçık Erişim2013Scopus SJRQ4Adsorption of the 2,2-Dichlorovinylphosphate on Raw and Modified Bentonites
Yönten, Vahap; Kubilay, Senol
This study aims to investigate the adsorption of the 2,2-dichlorovinylphosphate (DDVP) on raw and modified bentonite via high pressure liquid chromatography and infrared spectroscopy. The modified bentonites were prepared by adding HNO3 and Na2CO3. The Freundlich adsorption isotherm defines 2,2-dichlorovinylphosphate adsorption in aqueous and aqueous ethanol solutions through raw and modified bentonite. Variables such as temperature, time and pH were observed on 2,2-dichlorovinylphosphate adsorption. Then the capacity for maximum 2,2-dichlorovinylphosphate adsorption was measured on modified bentonite with HNO3 under the conditions of pH 3 and 40 degrees C. The modified bentonite with Na2CO3 clay used in experimental work played a major role on the adsorption of 2,2-dichlorovinylphosphate; thus modified bentonite with Na2CO3 is considered to possess better characteristics than modified bentonite with HNO3 and raw bentonite. The Freundlich isotherms of modified bentonite with Na2CO3 in aqueous-ethanol solution were found to be better than isotherms of aqueous solution for a much better 2,2-dichlorovinylphosphate adsorption.
AtıfOpenAlex1İncele - MakaleAçık Erişim2014Hospital and health care satisfaction levels of the parents with inpatient children
Arikan, Duygu; Saban, Fatma; Bas, Nazan Gurarslan
Objective: This research is done with the aim of determining hospital and health care satisfaction levels of the parents with inpatient children. Methods: Research was carried out descriptively at a university hospital after necessary permissions were taken from institutions. Parents whose children would stay at hospital between April-June 2012 formed the structure of the research and without using any sampling method, 171 volunteer parents were included in research. In collecting data, PedsQL Health Care Satisfaction Scale and descriptive information forms were used. In the statistical evaluation of data percentage distributions, means, standard deviation, t-test, ANOVA, Kruskal Wallis, Mann Whitney U test and alpha coefficient were used. Results: It was determined that there is statistically important difference between communication and technical skill sub-dimensions (p<0,05). It was confirmed that the longer the child hospitalized, general satisfaction of the parents who cannot supply their own necessities (p<0,05), related to moderate technical skill and emotional requirement sub-dimensions decreases (p<0.05). Besides, lower emotional satisfaction subdimension scores for those who had no accommodation (p<0,05), decreased general satisfaction level of the parents who had another child at home (p<0,05). Also family participation and general satisfaction subdimension scores of the parents whose child incurred financial burden was relatively low (p<0,05). Conclusion: Parents were not satisfied with health care services they received. Accordingly, it is offered that the nurses should have a right to make decisions on the procedures related to families' inpatient children and let them be with their children during the procedures and give them information on the procedures that will be applied on the children.
AtıfWoS5OpenAlex7İncele - MakaleAçık Erişim2015Scopus SJRQ3Alterations of Growth Performance and Blood Chemistry in Nile Tilapia (Oreochromis Nuoticus) Affected by Copper Sulfate in Long-Term Exposure
Mutlu, Ekrem; Aydin, Seyit; Kutlu, Banu
The objective of this study was to evaluate the effects of copper sulfate (CuSO4(5 H2O)) on the Nile tilapia (Oreochromis niloticus). Median (LC50) and minimum (LC1O) lethal concentrations of copper sulfate on Nile tilapia were determined via acute tests. LC50 values of copper sulfate for the 48th, 72nd and 96th hours were 13.15, 12.95 and 12.85 mg/L, respectively. LC10 values of 12, 11 and 9.5 mg/L were obtained for similar exposure periods (48th, 72nd and 96th hours), respectively. The effects of 1.5 mg/L dose of copper sulfate on growth rate, gross clinical observations and blood biochemical parameters of Nile tilapia were evaluated after 35, 65 and 95 days of exposure periods. The differences of growth rates between control and copper sulfate-exposed groups were not significant (P>0.05) at the end of 35, 65 and 95 days. Continuous exposure of Nile tilapia to 1.5 mg/L concentration of copper sulfate in water solution for three periods (35, 65 and 95 days) decreased the total protein, albumin, aspartate aminotransferase (AST), alanine aminotransferase (ALT), glucose (except the elevation in the exposed group at the end of 95 days period), magnesium (Mg+2), calcium (Ca+2), iron (Fe+2), potassium (K+), sodium (Na+1), chloride (Cl-) and phosphate values in serum. The cholesterol, low density lipid (LDL), triglyceride, globulin, creatinine, alkaline phosphatase (ALP), total bilirubin, direct bilirubin, uric acid and blood urea nitrogen (BUN) concentrations in the serum increased in copper sulfate-exposed fish.
AtıfWoS23OpenAlex14İncele - MakaleYalnız künye2016Scopus SJRQ3Combined effects of physicochemical variables (pH and salinity) on sperm motility: characterization of sperm motility in European sea bass Dicentrarchus labrax
Ögretmen, F.; Inanan, B. E.; Kutluyer, F.
Gamete activation in fish is an important step in terms of artificial fertilization of oocytes, cryopreservation studies and other experimental manipulations. Salinity and pH differences in activation media affect to sperm motility and fertilizing ability. These experiments were therefore designed to investigate the combined effects of pH (range 5.0-9.0) and salinity (20, 30, 37, and 45 parts per thousand) of activation media on sperm motility of European sea bass Dicentrarchus labrax. The best results were obtained at salinity 37 parts per thousand and a pH of 9.0. Our results also demonstrated that non-progressive motility at salinity 45 parts per thousand was observed in the range of 5.0-9.0 pH. In conclusion, spermatozoa can be motile at a wide range of pH and salinity values although the percent of motile spermatozoa and motility duration are negatively affected by low pH values.
AtıfWoS13OpenAlex17İncele - MakaleAçık Erişim2021Determination of thermal tolerance parameters of swordtail (Xiphophorus helleri) and platy fish (X. maculatus) acclimated to different temperature levels
Yanar, Mahmut; Özdes, Ali; Erdogan, Erhan; Evliyaoglu, Ece
Thermal tolerance parameters of swordtail (Xiphophorus maculatus) and platy (X. helleri) at three acclimation temperatures were determined in the study. The CTMin values at 20, 24 and 28 degrees C acclimation temperature were 9.41,10.42 and 11.95 degrees C respectively for platy and 9.38,11.5 and 13.23 degrees C for swordtail, while CTMax values were 37.41, 39.19 and 40.52 degrees C for platy and 36.94, 38.89 and 40.07 degrees C for swordtail. Accordingly, acclimation temperature affected the lower and upper temperature tolerances of fish by 3-4 degrees C. The CTMin ARR values varied between 0.42-0.42 in swordtail and 0.20-0.34 in platy, while CTMax ARR ranged between 0.29-0.48 in swordtail and 0.33-0.44 in platy depending on acclimation temperature. Thermal tolerance polygon area of platy (232 degrees C-2) was slightly higher than that of swordtail (217.3 degrees C). The fact that both fish species have lower temperature tolerances limits their geographic distribution and aquaculture in subtropical climates where the water temperature drops to 10 degrees C in winter.
AtıfWoS2OpenAlex1
İncele - MakaleYalnız künye2012Scopus SJRQ2ANTIOXIDANT PROPERTIES OF WILD EDIBLE MUSHROOM PLEUROTUS ERYNGII COLLECTED FROM TUNCELI PROVINCE OF TURKEY
Yildirim, Nuran Cikcikoglu; Turkoglu, Semra; Yildirim, Numan; Ince, Olcay Kaplan
Antioxidants are our first line of defense against free radical damage, and are critical for maintaining health. The need for antioxidants becomes even more critical with increased exposure to free radicals. In the past few years there has been an increasing interest in determining relevant dietary sources of antioxidant phenolics. Mushrooms have been not only used as food materials with their unique flavor and texture, but also recognized as an important source of biologically active compound of medicinal value. In our study, to determine the antioxidant properties of the methanolic extracts of Pleurotus eryngii strains collected from different region of Tunceli, radical scavenging activity, total phenolic contents, reducing power, metal chelating activity and total antioxidant status (TAS) were analyzed. The analysis of phenolic compounds was performed by HPLC. In particular, the methanolic extract of P. eryngii collected from city center revealed the highest DPPH radical scavenging activity and reducing power, while the highest total phenolics and total antioxidant status was determined in P. eryngii collected from Pulumur. P. eryngii collected from Ovacik showed the highest chelating effects. Concentration of phenolic compounds found in three wild edible mushrooms. Kaempferol and catechin were not determined in musrooms species. The highest rutin levels were determined in ovacik. Resveratrol was determined only in Pulumur. The studied wild mushrooms might be beneficial to protect human body against oxidative damage.
AtıfWoS40İncele - MakaleYayıncıda açık erişim2016Scopus SJRQ3Determination of Drying Kinetics of Tunceli Garlic with Microwave Drying Technique
Yogurtçu, Hakan
In this study, drying kinetics of 4 mm-thick slices of Tunceli garlic (Allium tuncelianum) was investigated by using microwave technique at an interval of 90-600 W microwave output power. Ten mathematical models were used to represent the experimental data in this study. The determination of coefficient (R-2), root mean square error (RMSE), chi-square (chi(2)) and percentage error (E%) values that show compatibility to these models were determined. The determination of coefficient (R-2) values were found to vary at an interval of 0.9440-0.9993. The Midilli et al model was determined to be the best model that represents the experimental data. It was seen that drying rate increases with the increase in microwave output power (P) and decreases with the increase in sample mass (m). Effective diffusion coefficients (D-eff) and drying rate constants (k) were determined for different sample masses at microwave output power of 90 W. Activation energies for both effective diffusion coefficients and drying rate constants were determined by using an Arrhenius type exponential equation. Activation energies from effective diffusion coefficients and drying rate constants were found as 3.85 W g(-1) and 3.99 W g(-1) respectively.
AtıfWoS2OpenAlex3İncele - MakaleYalnız künye2021TREND ANALYSIS OF THE EFFECT OF RAIN ON SOLAR ENERGY PRODUCTION IN A SUSTAINABLE FUTURE
Korkmaz, Meral
The greatest need of the modern world is energy. From production to consumption, energy has become essential in all areas. As fossil-derived energy production systems cause global warming and climate change, interest in renewable energy sources is increasing. Despite the pandemic, solar production has shown promising growth throughout the world. Turkey has been encouraging investments in renewable energy sources, especially solar energy, for the last 10 years. Feasibility studies before the installation of solar power plants are crucial for investors. As a result of feasibility studies, the cost of the investment and the depreciation period can be calculated. In this study, feasibility studies of the 474 kWp power plant in Samsun province were carried out with PVsyst program. Significant differences were found between the software results and the actual results of the solar plant built in Samsun province. Production losses between actual data and numerical data are thought to be related to meteorological data. There are numerous studies in the literature about PV software. However. current studies have not examined the effect of meteorological data of the region on the difference in production between PV software results and solar power plant production values. In this study, the Sen method was used to determine the precipitation trend by taking meteorological data from Samsun province. With this method, rainfall in Samsun province was seen to be on an upward trajectory. For this reason, in regions where there is a lot of precipitation; feasibility studies of solar power plants are falling by approximately 9 percent.
- MakaleAçık Erişim2025YOLOv8 for Road DamageRecognition: Deep Learning-Based Segmentation and Detection System
Agdas, Mehmet Tevfik; Arik, Kaan
Road surface detection is critical for improving traffic safety and reducing road maintenance costs. Because traditional methods are time-consuming and costly, deep learning-based image processing techniques offer an important alternative in this field. This study aims to develop a model that automates the detection and segmentation of road surface defects such as potholes, manhole covers, and culverts using deep-learning-based image processing techniques. In this study, a dataset previously used in the literature was preferred. It was observed that object detection was performed using a dataset from the literature. In this study, both object detection and object segmentation were performed using different parameters. To prove the success of object segmentation, both object detection and segmentation were performed using the YOLOv8 algorithm, which has previously obtained successful results. AdamW optimization and Auto Batch parameters were selected for this study. With these parameters, object detection was first performed with the YOLOv8s model, which is one of the variances of the YOLOv8 algorithm with the most successful results in the literature, and a successful 92.8% mAP@50 performance value was obtained according to the sources in the literature. In this study, the YOLOv8n, YOLOv8s, YOLOv8m, and YOLOv8l variance models of the YOLOv8 algorithm were used with the preferred parameters, and segmentation was performed. In object segmentation, a map@50 performance value of 90.9% in all classes and 99.1% in culverts was obtained using the YOLOv8l model. A map@50 performance value of 89.1% for pothole segmentation and 88% for manhole cover segmentation was obtained using the YOLOv8s model. The results of the analyses showed consistency in precision and recall values. These findings contribute significantly to improving road safety, reducing maintenance costs, and supporting sustainable urban infrastructure. Future research could explore integrating multiple data sources and adapt these models to more complex road conditions.
AtıfOpenAlex1İncele - MakaleYalnız künye2010Scopus SJRQ3SEASONAL VARIATIONS OF BIOCHEMICAL TASTE PARAMETERS IN MILKS FROM CONVENTIONAL AND ENVIRONMENT - FRIENDLY ORGANIC FARMING
Cimen, M.; Yildirim, N.; Dikici, A.; Kaplan, O.; Yildirim, N. Cikcikoglu
CIMEN, M., N. YILDIRIM, A. DIKICI, O. KAPLAN and N. CIKCIKOGLU YILDIRIM, 2010. Seasonal variations of biochemical taste parameters in milks from conventional and environment-friendly organic farming. Bulg. J. Agric. Sci., 16: 728-732 The aim of this study is to research the milk biochemical taste components in organic (ORG) and conventional (CON) systems for different season. In study, all data were investigated for all season of 2004. Milk fat levels in both groups for summer season were lower than any other season. Average milk fat values in ORG treatment were lower than the values of CON treatment in all season except winter period. Therefore, a decrease in fat percentage for organic milk can directly lead to taste loss. Similarly, total solid rates in conventional milks in spring period were more favorable than rates in organic milk for desired taste. However, the pH value in organic milk was more acceptable for required flavor in summer season.
AtıfWoS2İncele - MakaleAçık Erişim2014Scopus SJRQ2Gundelia dersim and Gundelia munzuriensis (Compositae), two new species from Turkey
Vitek, Ernst; Yüce, Ebru; Ergin, Cemil
Two new species of Gundelia (Compositae) are described from Turkey, G. dersim Vitek, Yuce & Ergin sp. nov. and G. munzuriensis Vitek, Yuce & Ergin sp. nov.
AtıfWoS12OpenAlex14İncele - MakaleYalnız künye2019Scopus SJRQ4THE EFFECT OF PENDIMETHALIN HERBICIDE ON ANTIOXIDANT SYSTEM IN SAFFLOWER
Beker-Akbulut, Gulcin
Pendimethaline is a dinitroaniline herbicide compound which selectively controls weeds. It is a cell division and growth inhibitor. In this study, pendimethalin herbicide was applied to Dincer and Remzibey cultivars of Carthamus tinctorius L. in 0.004-0.01 M concentration range after germination. The effects of pendimethalin upon peroxidase (POD), ascorbate peroxidase (APX), superoxide dismutase (SOD), catalase (CAT) reduced glutathione (GSH), glutathione reductase (GR), glutathione-Stransferase (GST) and total phenolic content were investigated on the 24, 48 and 72 hours following the treatment. POD, APX, SOD, CAT and GST activities were increased on the 24, 48 and 72 hours in Dincer while decreased at 72 hour in Remzibey. GSH and GR activity were decreased at 72 hour in Dincer and Remzibey. Total phenolic content decreased at 48 and 72 hours in Dincer and Remzibey. In this study, we determined that pendimethalin herbicide affected the antioxidant enzyme activities in Dincer and Remzibey.
AtıfWoS1İncele - MakaleYalnız künye2011Scopus SJRQ2Toxic Elements in Animal Products and Environmental Health
Kaplan, O.; Yildirim, N. C.; Yildirim, N.; Cimen, M.
In the higher organisms, the intake of trace elements occurs mainly through the respiratory system or through the food chain. Particularly, many dangerous elements or compounds, such as metals accumulate along the food chain. In this way, the food chain becomes the main gateway for persistent toxicants to enter higher organisms. Furthermore, these toxic elements generally have an anthropogenic origin and thus their concentrations in the environment grow with the increase of urban, agricultural and industrial emissions. With increasing environmental pollution, a toxic metal exposure assessment study is necessary. Toxic elements are not metabolized at all. Some metals irreversibly are bound to body tissues, e.g., lead to bone or cadmium to kidneys. This review updates the information on carry-over of toxic substances from feed to food of animal origin (meat, organs, milk and eggs). The control of environmental contaminants that may cause residues in food of animal origin is sometimes quite difficult and expensive and is addressed with special attention in this review.
AtıfWoS27OpenAlex65İncele - MakaleAçık Erişim2013Scopus SJRQ3Leslie Population Estimation for Turkish Crayfish (Astacus leptodactylus Esch., 1823) in the Keban Dam Lake, Turkey
Yüksel, Fahrettin; Demirol, Ferhat; Gündüz, Fatih
The population size was researched by using Leslie method on the zones of Keban Dam Lake where crayfish is fished for commercial purposes. The data were compiled by using effort expended and catch obtained by 28 fishing boats during 2012 crayfish fishing season. 28 fishing boats fished 16,867 kilograms of crayfish during the fishing season by using 45,600 pieces of crayfish fyke nets. It is determined that the quantity catch per unit effort (CPUE) varies between 2.74 to 6.35 kg/100 fyke nets/week during the 9 weeks fishing period. The population size at the beginning was estimated to be 28,450 kg (at minimum legal length of >= 10 cm). The 95% confidence interval of this estimation was calculated to be 25,607-32,533 kg. Similar researches on crayfish populations concluded that removal method can offer very important details.
AtıfWoS11OpenAlex13İncele - MakaleYalnız künye2026Scopus SJRQ2Practical one-step solvothermal synthesis of photoactive lanthanum(III)hydroxide-metaborate composite nanosheets with suitable band gap for optoelectronics
Karaduman, Oktay
Rare earth compounds, including lanthanide hydroxides, have been greatly interested for their promising uses, such as in optoelectronics or photonics, due to their unique electronic and optical transitions properties based on their 4f electron shells. In this work, for the first time new transparent flower-like lanthanum(III)hydroxide (La(OH)3) with borate (LaB3O6) composite nanosheets having a semiconducting band gap suitable for optoelectronics were synthesized by a very simple one-step solvothermal method from a mixture of pure lanthanum oxide and boron without using water or any acidic solvent or surfactant. The practical synthesis was made for two different solvothermal time durations. The synthesized nanocomposites were investigated by XRD, FIB-SEM imaging, EDS, FTIR, UV-vis absorbance, Raman, Ellipsometry, and TG-DTA analyses. The pure precursors lanthanum oxide (La2O3) and boron converted to La(OH)3 and LaB3O6. EDS elemental mapping showed the homogeneous distribution of elements in the nanocomposites. A strong deep-UV absorbance band was detected. The very low reflectance and excellent visible transmittance (exceeding 86% for the sample with a longer solvothermal process time) reaching infrared region were achieved. The direct and indirect band gap energies were estimated by the Tauc plot method for both of the composite samples. Adding boron reduced the literature given direct band gap value (around 4.5-5.5 eV) of pure La(OH)3. DTA and TGA results revealed the steps of mass losses, including decomposition of La(OH)3. FTIR analyses confirmed the presence of the formed compounds. All results showed that the La(OH)3+LaB3O6 nanocomposites can be suitably used in related applications, including electro-optic, photonic, solar cell, catalysts etc.
- MakaleYalnız künye2011Scopus SJRQ3EVALUATION OF ENVIRONMENTAL POLLUTION AT MUNZUR RIVER OF TUNCELI APPLYING OXIDATIVE STRESS BIOMARKERS IN CAPOETA TRUTTA (HECKEL, 1843)
Yildirim, N. C.; Benzer, F.; Danabas, D.
Aim of this study was to determine the extent of pollution in the Munzur River in Turkey was determined. The antioxidant (reduced glutathione (GSH), glutathione peroxidase (GSH-Px) catalase (CAT)) and the oxidant (MDA) status of hepatopancreas, gills, muscle, heart and kidney tissues of C. trutta were chosen as bioindicators. The fish samples were caught from contaminated (Station I) and uncontaminated (Station II) stations in Munzur River during April 2010. GSH levels were lower in gill, muscle and heart of the C. trutta collected at the contaminated station (p<0.05). The MDA levels were significantly higher in gill, muscle, kidney and heart of the C. trutta from the contaminated station (p<0.05). The CAT activity was significantly increased in the gill tissue at the contaminated station (p<0.05). GSH-Px activity was significantly decreased (p<0.05) in gill, muscle, kidney and heart tissues samples from C. trutta collected at the contaminated station compared to those collected from the uncontaminated station. Overall, the results demonstrate that alteration in the antioxidant enzymes, glutathione system and induction of lipid peroxidation reflects the presence of pollution, which may cause oxidative stress in the C. trutta from Munzur River. The results provide evidence those enzymatic and non-enzymatic biomarkers of oxidative stress.
AtıfWoS24İncele - MakaleAçık Erişim2025Antigenotoxic Effects of Stachys viscosa (Lamiaceae), a potential medicinal plant in Drosophila melanogaster
Karabulut, Aygul Kilic; Açar, Mikail
This research aimed to examine the anti-genotoxic properties of Stachys viscosa, a plant of the Lamiaceae family, which has medicinal and aromatic properties and is widely used in cosmetics, food, and pharmaceutical industries. The Drosophila wing somatic mutation and recombination test (SMART), an in vivo tool for evaluating somatic mutation and recombination, was employed. The antigenotoxic effect of the S. viscosa plant against mitomycin C (MMC) mutagen was investigated. The study evaluated doses of 5 mg, 15 mg, 45 mg, and 60 mg of S. viscosa, concluding that doses of 45 mg and 60 mg effectively mitigated DNA damage induced by MMC. At doses of 45 mg and 65 mg, the total number of spots caused by MMC was suppressed by 8.21% and 13.17%, respectively. The data collected indicate that the S. viscosa plant possesses certain anti-genotoxic properties.
AtıfWoS2OpenAlex2İncele - MakaleYalnız künye2010Scopus SJRQ3Biochemical Taste Parameters of Milk from Machine Milking Cows in Late Lactation Period
Tekelioglu, O.
This research was performed to investigate the effect of late lactation period on milk biochemical taste parameters such as fat and acidity of machine milked cows and to show these biochemical parameters during last month of late lactation. Cows were fed standard diet for lactation period. In the study, a total of 40 cow milk samples were collected and examined from DIMES Company during January month. The milk fat rates were lower (p<0.05) for cows in first week (2.8%) than last week (3.3%). There were statistically no significant differences between the weeks for milk acidity (sH and pH) values of machine milked cows. The milk fat and acidity values (sH and pH) during study were favorable for desired taste and consumer choice.
