Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(86)
- Güler, Ömer(69)
- Akkurt, Nevzat(68)
- Baskonus, Haci Mehmet(53)
- Tekin, H.O.(52)
- Bulut, Hasan(50)
- ALMisned, Ghada(49)
- Serdar, Osman(43)
- Yucesan, Melih(43)
- Paksoy, Mehmet Yavuz(42)
- Yildirim, Numan(41)
- Zengin, Gokhan(40)
- Yildirim, Nuran Cikcikoglu(39)
- Ince, Muharrem(37)
- Kocabaş, Mehmet(37)
- Celik, Erkan(35)
- Benzer, Fulya(33)
- Sulaiman, Tukur Abdulkadir(29)
- Aslan, Naim(27)
- Can, Erkan(27)
- Kutlu, Banu(27)
- Kök, Mediha(27)
- Tanyol, Mehtap(27)
- Danabas, Durali(26)
- Kutluyer, Filiz(26)
- Özkul, İskender(26)
- Ates, Mehmet(25)
- Yildirim, Ozal(25)
- Onat, Onur(23)
- Topal, Murat(23)
- Demir, Veysel(22)
- Erten, Fusun(22)
- Guler, Omer(22)
- Say, Yakup(22)
- Yaman, Mehmet(22)
- Alataş, Mevlüt(21)
- Güler, Seval Hale(21)
- Çimen, Okay(21)
- Baykal, Duygu Sen(20)
- Mete, Suleyman(20)
Yayınlar
- MakaleAçık Erişim2013Scopus SJRQ1Optimal feature selection for classification of the power quality events using wavelet transform and least squares support vector machines
Eristi, Huseyin; Yildirim, Ozal; Eristi, Belkis; Demir, Yakup
In this paper, a new optimal feature selection based power quality event recognition system is proposed for the classification of power quality events. While Apriori algorithm is capable of processing categorical data, an effective feature vector, which represents distinctive features of digital power quality event data, has been obtained by means of the proposed k-means based Apriori algorithm feature selection approach. The proposed k-means based Apriori algorithm feature selection approach is presented with a power quality event recognition system. In the power quality event recognition system, normalization and segmentation processes have been applied to three-phase event voltage signals. Using 9-level multiresolution analysis, wavelet transform coefficients of the event signals have been obtained. By applying nine different feature extraction processes to these coefficients, a 90 dimensional feature vector belonging to three-phase event voltage signals has been extracted. Optimal feature vector has been obtained by applying the k-means based Apriori algorithm feature selection approach to the obtained feature vector, which has been applied as the last step to the input of the least squares support vector machine classifier and recognition performance results have been obtained. Real power quality event data have been used to evaluate the performance of the proposed feature selection approach and power quality event recognition system. According to the results, the proposed k-means based Apriori algorithm feature selection approach and power quality event recognition system are efficient, reliable and applicable and classify three-phase event types with a high degree of accuracy. (C) 2013 Elsevier Ltd. All rights reserved.
AtıfWoS98OpenAlex131
İncele - MakaleAçık Erişim2013Scopus SJRQ4Bioaccumulation of Copper and Zinc in Freshwater Crayfish (Astacus leptodactylus) Fed with Zebra Mussels (Dreissena polymorpha) Collected from Keban Dam Lake, Turkey
Aksu, Onder; Gulec, Azime Kucukgul; Demir, Veysel; Danabas, Durali; Yildirim, Numan; Ozcelik, Mehtap; Can, Erkan; Kocabas, Mehmet
This study is aimed to determine the bioaccumulation of copper and zinc in hemolymph of freshwater crayfish (Astacus leptodactylus) fed with zebra mussel (Dreissena polymorpha) collected from Keban Dam Lake. This is the first study on bioaccumulation of Cu and Zn in hemolymph of males and females of A. leptodactylus. The average concentrations of Cu and Zn in the hemolymph samples were found out as 0.54 and 35.07 ppm respectively for male and 0.42 and 15.59 ppm respectively for female control freshwater crayfish. The levels of Zn in the hemolymph of both male and female ones among control and diet groups were statistically significant (P < 0.05). The Cu levels among control and diet groups in female ones were statistically significant (P < 0.05) but not in the male ones (P > 0.05). The results of current study revealed that feed treatment with boiling was not effective at the levels of metal bioaccumulation in hemolymph. It was observed that this metal bioaccumulation is more related with sex differences.
AtıfWoS2OpenAlex2İncele - MakaleAçık Erişim2013Scopus SJRQ4Determination of the Antioxidant Vitamin Levels in Fresh and Dried Bee Pollens in Bingol's Flora
Alayunt, Naci Omer; Karagözoglu, Yusuf; Parlak, Akif Evren; Türkoglu, Semra
In this study, fresh pollens collected from Bingol, province in Turkey were analyzed in June and the dried pollens stored by being kept in a cool, dark place for 8 months at room temperature were analyzed again in February. It was determined that, during this time, there was the maximum loss in the group Adakli with 68.23 % in terms of vitamin A, in the group Gokdere with 70.60 % in terms of vitamin E, in the group Adakli with 71.01 % in terms of vitamin C. These results obtained about the values of vitamin may vary depending on the geographic location where the pollen grows up, the season in which it is gathered and its drying and storage conditions.
AtıfWoS3OpenAlex4İncele - MakaleYalnız künye2013Scopus SJRQ2Relationship between fatigue and social support in hemodialysis patients
Karadag, Ezgi; Kilic, Serap Parlar; Metin, Ozgur
The aim of this study was to evaluate the relationship between fatigue and social support in hemodialysis patients in Turkey. This study was conducted on 73 patients receiving hemodialysis treatment in a hemodialysis unit in the province of Malatya between July and November 2011. A questionnaire consisting of 16 questions for sociodemographic and disease data was used together with the Multidimensional Scale of Perceived Social Support (MSPSS) and the Fatigue Severity Scale (FSS). In statistical evaluation, the Mann-Whitney U-test, independent t-test, Kruskal-Wallis test, and Pearson's correlation analysis were used. Correlation analysis between severity of fatigue in hemodialysis patients and social support revealed a significant relationship in the negative direction between fatigue severity and support from family (r=-0.404, P<0.05), support from friends (r=-0.635, P<0.05), support from a special person (r=-0.638, P<0.05) and overall support (r=-0.643, P<0.05). Patients with severe fatigue had low mean scores for support from family, friends, a special person and overall, whereas a high level of social support decreased the level of fatigue. When giving care to patients on hemodialysis, nurses should consider the effect of social support on fatigue and approach their patients from this perspective.
AtıfWoS27OpenAlex45
İncele - MakaleYalnız künye2013Scopus SJRQ2THE EFFECTS OF HYDROXYUREA DERIVATIVE 1, 3, 4-THIADIAZOLES ON SERUM BIOCHEMICAL PARAMETERS AND ANTIOXIDANT STATUS IN LIVER OF RATS
Karagozoglu, Yusuf; Türkoglu, Semra; Parlak, Akif E.; Alayunt, Naci O.
In this study, it was aimed to investigate the antioxidant and antihepatotoxic effect of hydoxyurea derivative 1,3,4-thiadiazoles on serum biochemical parameters (AST, ALT, LDH, urea, creatinine and total bilirubin) and antioxidant parameters (SOD, CAT, GPX, MDA). In our study, a total of 35 adult male wistar rats were divided into 5 equal groups. DMSO diluted with only corn oil, was injected to the control group. 25 mg/kg ligand, 25 mg/kg thiadiazole-manganese, 25 mg/kg thiadiazole-cadmium and 25 mg/kg thiadiazole-chrome complexes was injected to the experimental groups rats subcutaneously for 15 days with three-day interval during the test. After blood samples were centrifuged AST, ALT, LDH enzyme activites hepatic injury; and then, the activites of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), and the level of malondialdehyde (MDA) in liver tissues were determined spectrophotometrically. The level of AST was found to be lower (p<0.05) in the Cr-L group than in other groups. The levels of ALT and total bilirubine were found to be lower (p<0.05) in the Cd-L group than in other groups. The level of SOD was found to be higher (p<0.05) in the Cd-L group than in other groups. The levels of GPX was found to be lower (p<0.05) in the Cr-L group than in other groups. As a result, it can be concluded that their pharmacological characteristics can be beneficial in many fields of application because hydroxyurea derivative 1,3,4 thiadiazole compounds show the antioxidant and antihepatotoxic activity.
AtıfWoS1İncele - MakaleYalnız künye2013Scopus SJRQ3The Anesthetic Effects of Clove Oil and 2-Phenoxyethanol on Rainbow Trout (Oncorhynchus mykiss) at Different Concentrations and Temperatures
Yildiz, M.; Kayim, M.; Akin, S.
In this study, anesthetic effects of five different concentrations of 2-phenoxyethanol (0.2, 0.3, 0.4, 0.5 and 0.6 ml/L) and clove oil (0.50, 0.75, 1.00, 1.25 and 1.50 ml/L) on rainbow trout (Oncorhynchus mykiss) were studied at temperatures 7, 13 and 18 degrees C. For this purpose, 900 fish (39.08 +/- 1.13 g and 15.48 +/- 0.21 cm) were used in the experiment. Induction time of 2-phenoxyethanol and clove oil varied between 1.05 and 3.36 min at all concentrations, except for 0.2 ml/L (for 2-phenoxyethanol only) and at every temperature application. Full recovery time occurred between 2.44 and 7.14 min for 2-phenoxyethanol and 3.23 - 6.11 min for clove oil. It was found that full recovery times significantly increased with increase in 2-phenoxyethanol concentrations (r(2)=0.81). The same increasing trend was observed in clove oil, but the increase was not strong compared to 2-phenoxyethanol (r(2)=0.21). On the other hand, full induction times of 2-Phenoxyethanol and clove oil significantly declined with the increase in concentrations (r(2)=0.74; r(2)=0.84 for 2-phenoxyethanol and clove oil, respectively). Based on the ideal induction (less than 3 min) and recovery (less than 5 min) time criteria, it can be suggested that the most appropriate concentrations for rainbow trout were 0.3, 0.4 and 0.5 ml/L for 2-phenoxyethanol and 0.50, 0.75 and 1.00 ml/L for clove oil.
AtıfWoS16İncele - MakaleAçık Erişim2013Scopus SJRQ3Determination of phytochemical characteristics of the extract of Zea mays with Saccharomyces boulardii
Erecevit, Pinar; Kirbag, Sevda; Yilmaz, Okkes
Fatty acid, vitamin, phytosterol, flavonoid, and resveratrol contents and antimicrobial activities of Zea mays L. (corn) extracts treated with Saccharomyces boulardii were determined and compared. The total fatty acid, vitamin, and phytosterol contents in corn extract were at certain levels. It was detected that total fatty acid levels and vitamin contents of corn extracts prepared with Saccharomyces boulardii increased; however, flavonoid contents decreased at different rates. In addition to this, it was observed that naringin, resveratrol, and myricetin flavonoids were present in the extracts that contained S. boulardii. In the study, it was noticed that Z. mays L. (corn) had antioxidant and antimicrobial activities at different rates. It was observed that S. boulardii developing in extracts obtained from plants affected bioactive compounds at different rates.
AtıfWoS3OpenAlex4İncele - MakaleYalnız künye2013Scopus SJRQ2MULTI OBJECTIVE GENERALIZED RESOURCE CONSTRAINED TWO SIDED ASSEMBLY LINE BALANCING PROBLEM AND COMPUTATIONAL ANALAYSIS
Mete, Suleyman; Agpak, Kursad
Assembly of large size products like bus, truck and automobile can perform both sides of assembly line. In such cases, both sides (right and left) of the line are used to achieve for the assembly operation. These types of the lines are called as two sided assembly lines. When large size products are produced, sometimes they require a specific machine or a qualified staff to use this machine. This condition also exposes the problem of resource constraint. Therefore, in this study, a mathematical model for generalized resource constraint two sided assembly line balancing problem is presented, based on literature models and computational analysis is performed for multi-objective situation. Proposed model is run and analyzed over several known test problems by considering three objective functions (Minimization number of station, number of position and resource cost).
AtıfWoS8İncele - MakaleAçık Erişim2013Scopus SJRQ1Survival of Listeria monocytogenes during Production and Ripening of Traditional Turkish Savak Tulum Cheese and in Synthetic Gastric Fluid
Dikici, Abdullah; Calicioglu, Mehmet
This study investigated the survival and acid tolerance of Listeria monocytogenes during the 2-day processing stage and 90-day ripening of Savak tulum cheese, a traditional cheese in Turkey. Experimental Savak tulum cheese was produced from raw sheep's milk that was inoculated with a L. monocytogenes mixture consisting of five strains (average 7.0 log CFU/ml) and was ripened at 6 degrees C for 90 days. Microbiological and chemical analyses and acid exposure experiments in synthetic gastric fluid (SGF) (pH 1.5 to 2.5) were carried out on days 1 and 2 during processing and on days 0, 15, 30, 45, 60, and 90 during ripening. The numbers of L. monocytogenes did not decrease during processing, but a total of 4.1 log CFU/g reduction was observed during ripening. Throughout the ripening period, L. monocytogenes cells survived direct 90-min exposures of the cheese samples to SGF. These results suggest that, although the pathogen numbers decreased in Savak tulum cheese ripened at 6 degrees C for 90 days, a sublethal environment may have occurred in the cheese during the production stage, activating the acid-tolerance mechanisms of the pathogen and allowing L. monocytogenes to maintain its viability in the SGF for 90 min.
AtıfWoS4OpenAlex6İncele - MakaleYalnız künye2013Scopus SJRQ2Micelle nano-reactors as mediators of water-insoluble ligand complexation with Cu(II) ions in aqueous medium
Adigüzel, Ragip; Tascioglu, Senay
Complexation reactions between water-soluble and -insoluble reactants were shown to occur in aqueous media in the presence of normal or reverse surfactant micelles, in significantly higher yields at lower temperatures compared to those achieved in neat organic solvents. The highest yield enhancement in the complexation of novel water-insoluble bis(2-amino-1,3,4-thiadiazolyl)methane and 1,4-bis(2-amino-1,3,4-thiadiazolyl)benzene ligands with Cu(II) ions was achieved in the sodium bis(2-ethylhexyl)sulfosuccinate (AOT)-heptane-water reverse micellar system at the hydration ratio of 15. The results revealed that AOT normal micelles cause a change in the reaction mechanism together with the enhancement of the complex formation. The observed micellar effects were rationalized on basis of the properties of bulk solvents, surfactants and ligands, considering the solvation and hydration ratios of reverse micelles. The results have proved the dependence of complex yield on the amount and accordingly also on the properties of water in the micellar core, indicating that the yield can be maximized by the optimization of the hydration ratio.
AtıfWoS4OpenAlex5İncele - MakaleYalnız künye2013Scopus SJRQ1Extrusion Cooking of Lentil Flour (Lens Culinaris-Red)-Corn Starch-Corn Oil Mixtures
Dogan, H.; Gueven, A.; Hicsasmaz, Z.
An expanded food product was obtained from lentil flourcorn starchcorn oil mixtures by extrusion cooking. Effects of protein, lipid, and moisture contents of the feed mixture; cooking temperature and screw speed on starch gelatinization; protein insolubility; and lipid complexation were investigated. Effects of these functional properties on expansion ratio, cell size distribution, and cutting strength were assessed. Optimum feed composition was 67% lentil flour, 30% corn starch, and 3% corn oil (db). This mixture was processed at 15% moisture content and 178 degrees C temperature. Expansion ratio was 3.7 and degree of gelatinization was 0.70.
AtıfWoS20OpenAlex29İncele - MakaleAçık Erişim2013Scopus SJRQ2Self-dual metrics on non-simply connected 4-manifolds
Kalafat, Mustafa; Ozan, Yildiray; Arguez, Hulya
We construct self-dual (SD) but not locally conformally flat (LCF) metrics on families of non-simply connected 4-manifolds with small signature. We construct various sequences with bounded or unbounded Betti numbers and Euler characteristic. These metrics have negative scalar curvature. As an application, this is used to address Remark 4.79 of [1]. (C) 2012 Elsevier B.V. All rights reserved.
AtıfWoS3OpenAlex6İncele - MakaleYalnız künye2013Scopus SJRQ3Elimination of Radiation Damping Effects from the NMR Relaxation Curves of H2O/D2O Mixtures Containing Protein and Ions
Zengin, Bilgin; Koylu, Mehmet Zafer; Korunur, Sibel; Yilmaz, Ali
In this work the T-1 and T-2 curves of H2O/D2O mixtures were obtained for several fractions of H2O and also for different amounts of albumin and manganese. The experiments were carried out with a 400 MHz proton NMR spectrometer. The T-1 and the T-2 curves were determined by the inversion recovery (IR) and Carr-Purcell-Meiboom-Gill (CPMG) sequences, respectively. The relaxation times in residual water and in a mixture with 0.05 ml H2O were found to be reliable either in the presence or in the absence of albumin. The mixtures containing 0.1 ml or higher H2O suffer from radiation damping (RD). RD was removed gradually by addition of albumin or manganese. RD in the protein solution with 0.1 ml H2O was removed by adding 1 mu g of manganese to one ml of solution. The data suggest that the relaxation times in H2O/D2O mixtures are measurable by conventional methods upon the addition of appropriate amounts of manganese and albumin.
AtıfWoS2İncele - MakaleAçık Erişim2013Scopus SJRQ3Mechanical and thermal properties of polyamide versus reinforced PMMA denture base materials
Soygun, Koray; Bolayir, Giray; Boztug, Ali
PURPOSE. This in vitro study intended to investigate the mechanical and thermal characteristics of Valplast, and of polymethyl methacrylate denture base resin in which different esthetic fibers (E-glass, nylon 6 or nylon 6.6) were added. MATERIALS AND METHODS. Five groups were formed: control (PMMA), PMMA-E glass, PMMA-nylon 6, PMMA-nylon 6.6 and Valplast resin. For the transverse strength test the specimens were prepared in accordance with ANSI/ADA specification No.12, and for the impact test ASTM D-256 standard were used. With the intent to evaluate the properties of transverse strength, the three-point bending (n=7) test instrument (Lloyd NK5, Lloyd Instruments Ltd, Fareham Hampshire, UK) was used at 5 mm/min. A Dynatup 9250 HV (Instron, UK) device was employed for the impact strength (n=7). All of the resin samples were tested by using thermo-mechanical analysis (Shimadzu TMA 50, Shimadzu, Japan). The data were analyzed by Kruskal-Wallis and Tukey tests for pairwise comparisons of the groups at the 0.05 level of significance. RESULTS. In all mechanical tests, the highest values were observed in Valplast group (transverse strength: 117.22 +/- 37.80 MPa, maximum deflection: 27.55 +/- 1.48 mm, impact strength: 0.76 +/- 0.03 kN). Upon examining the thermo-mechanical analysis data, it was seen that the E value of the control sample was 8.08 MPa, higher than that of the all other samples. CONCLUSION. Although Valplast denture material has good mechanical strength, its elastic modulus is not high enough to meet the standard of PMMA materials.
AtıfWoS67OpenAlex110İncele - MakaleYalnız künye2012Scopus SJRQ2Some Heavy Metals Accumulation in Tissues in Capoeta umbla (Heckel, 1843) from Uzuncayir Dam Lake (Tunceli, Turkey)
Ural, Mesut; Yildirim, Numan; Danabas, Durali; Kaplan, Olcay; Yildirim, Nuran Cikcikoglu; Ozcelik, Mehtap; Kurekci, Eylem Funda
Concentrations of metals were determined in the gills, liver, kidney, heart and muscle in Capoeta umbla caught from six stations from the Munzur River system. Metal concentrations in the tissues tended to vary significantly among stations (p < 0.05). Liver (Cu, 10.10 +/- A 0.23-23.03 +/- A 9.37 ppm; Zn, 14.67 +/- A 3.01-21.82 +/- A 2.39 ppm; Cd, 18.04 +/- A 4.56-52.69 +/- A 10.65 ppb and Fe, 28.87 +/- A 6.78-115.11 +/- A 34.87 ppm) and kidney (Cu, 1.80 +/- A 0.25-3.70 +/- A 0.62 ppm; Zn, 20.81 +/- A 0.37-29.36 +/- A 0.70 ppm; Cd, 132.06 +/- A 5.29-639.51 +/- A 20.14 ppb and Fe, 24.40 +/- A 1.98-59.39 +/- A 1.97 ppm) tissues showed higher metal concentrations than other tissues. It seems that metal contamination in the river is too high for the health of fish and the people who eat them. The geographical locations of catch, season, nature of diet, and the size of fish used for analyses might lead to different metal concentration in the same fish species.
AtıfWoS23OpenAlex27İncele - 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
AtıfWoS12OpenAlex14İncele - 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 - MakaleYalnız künye2012Scopus SJRQ4THE EFFECT OF SEPARATION FROM DAM ON SUCKLING DURATION AND FREQUENCY OF LAMBS
Cimen, M.
The influence of separation from dam on suckling behavior of lambs was tested from day 5 after lambing until the lambs were 8 days old. The twelve ewes with their lambs were randomly assigned in equal numbers to two treatments; separating from dam (S) and non-separating without suckling (NS). Separation from dam resulted in lower duration and higher frequency of suckling. The lambs in S treatment had shown lower milk intake as compared to rearing lambs by NS treatment until 8th day. Milk intake, duration and frequency of suckling in both groups decreased as age of the lamb increased until last day. Separation treatment was associated with stress in dams and their lambs had negative effect on suckling behavior and milk intake of offspring.
- MakaleYalnız künye2012Scopus SJRQ4Phytoplankton growth and microzooplankton grazing in the Homa Lagoon (Izmir Bay, Turkey)
Banu, Kutlu
Phytoplankton growth and microzooplankton grazing were investigated at one station in the Homa Lagoon from February to January in 2006-2007. Our results showed significant seasonal variations in phytoplankton dynamics. Microzooplankton was mainly composed of dinoflagellates and tintinnid ciliates and nauplii. Microzooplankton grazing increased with increasing of temperature. Grazing rate was maximum levels in spring and summer. Microphytoplankton, which dominated the total algal biomass and production, were characterized by the proliferation of several chain-forming diatoms. Small heterotrophic flagellates and aloricate ciliates were the main controllers of phytoplankton. Phytoplankton represented a significant for micrograzers, which grazing represented 20-120% of diatom and cynabacteria algal production during 2006-2007. Microzooplankton has, however, a relatively high impact on microphytoplankton, as > 45% of microalgal production was consumed throughout the year. These results suggest that the low grazing was one of the factors contributing to the development of the spring bloom. All of seasonal bases, the phytoplankton production were grazed by microzooplankton in summer, autumn and winter-spring seasons have been changing between 20%-120%. The seasonal variation in the microzooplankton grazing pressure seems to result from the dominant size class of the phytoplankton community of this lagoon diatom and cynabacteria.
AtıfWoS1İncele - MakaleYalnız künye2012Scopus SJRQ2Determination of Metal (Cu, Zn, Se, Cr and Cd) Levels in Tissues of the Cyprinid Fish, Capoeta trutta (Heckel, 1843) from Different Regions of Keban Dam Lake (Euphrates-Turkey)
Danabas, Durali; Ural, Mesut
The aim of this study was to evaluate Copper (Cu), Zinc (Zn), Selenium (Se), Chromium (Cr) and Cadmium (Cd) concentrations in liver, muscle, gills and kidney tissues of Capoeta trutta collected from four sites of Keban Dam Lake, Turkey. The highest heavy metal level in all tissues was for Zn, while Cd was the lowest. The lowest heavy metal levels were generally found at Station 4 (Agin) for all tissues (p < 0.05). There were statistically significant differences among stations for Cu, Zn, Cr and Se in gills; for Cu, Zn, Se and Cr in liver and kidney; and Cu, Zn and Cr in muscle (p < 0.05). Cadmium concentrations did not differ between sites for any of the tissues. Turkish Food Codex sets the maximum limits of Zn, Cu and Cd as, 50, 20 and 0.05 mg kg(-1) dry weight, respectively, in the muscle of fish used for human consumption. In our study, the level of Zn was higher than Turkish permissible limits only at Station 3 (Guluskur). Cadmium levels were much higher than permissible limits at three stations [S1 (Pertek), S2 (Kockale) and S3], whereas Cu levels were within permissible limits in all stations.
AtıfWoS13OpenAlex13İncele