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Öğe Deposition of dispersed particles in isotropic turbulent flow(Taylor & Francis Inc, 2008) Sarimeseli, Ayse; Kelbaliyev, GudretParticle deposition in turbulent flow depends on diffusional migrations and gravitational forces. However, the rate of this process occurs differently in vertical and horizontal flows. Therefore, some new expressions were suggested for these two types of flow in this article. Moreover, impact of the coalescence and break-up phenomena on deposition was investigated. Suggested equations were compared with the experimental data taken from the literature and a good agreement was recorded.Öğe Effect of Some Process Parameters on the Separation of the Dispersed Ferrous Impurities Using Cycled Electromagnetic Filter(Taylor & Francis Inc, 2010) Yildiz, Zehra; Abbasov, Teymuraz; Sarimeseli, AyseElectromagnetic filters (EMFs) can be effectively used for the cleaning of both industrial and domestic disposals such as waste water having low concentration and micron size of dispersed particles that show magnetic characteristics. In this work, we investigated the effect of some parameters of the filtration process, external magnetic field density, size of the filter matrix elements, filter length, filtration velocity, viscosity of the suspension, and number of the cycle on the separation efficiency of micron-sized particles that can be magnetized in an external magnetic field. It has been found that filtration efficiency decreased with increasing filtration velocity and suspension viscosity. Furthermore, the filter matrix elements geometry, pH value of the medium, and number of the cycling processes affected the cleaning efficiency. Recycling the suspension to the filter body allowed the cleaning process to be made in a smaller filter size with a high quality factor.Öğe Effect of Surfactants on the Particle Capture Mechanism in an Electromagnetic Filter(Taylor & Francis Inc, 2011) Abbasov, Teymuraz; Yildiz, Zehra; Sarimeseli, AyseIn this article, effects of the parameters of the filtration process and surfactants on the effectiveness of the separation of particles have been investigated. Water samples containing corrosion particles (rust) of low concentrations were mixed with a typical domestic type of detergent passed through an electromagnetic filter. It was found that the capturing capacity of the particles in the filter increased as the external magnetic field, filter length and the detergent concentration of the suspension increase, but the increase in diameter of the filter elements gave an opposite effect. Furthermore, it was recorded that the pH value of the suspension changes the efficiency of magnetic filter.Öğe Effect of the Magnetization Properties of the Granular Beds and the Operating Parameters on the Removal Ferrous Particles From the Waters by Using Magnetic Filter(Taylor & Francis Inc, 2013) Yildiz, Zehra; Abbasov, Teymuraz; Sarimeseli, AyseIn this article, magnetizing properties of different packed beds constructed from magnetic balls, pieces of rods, and chips were investigated in order to determine their effect on the magnetic filters' performance. Magnetizing curves obtained from the results show that the magnetization of packed beds constructed from magnetic balls is stronger than of those constructed from pieces of rods and/or chips. Effects of the external magnetic field intensity, filter length, and recycle number on the effectiveness of magnetic filtration of both solutions were also investigated. We found that corrosion particle capturing capacity of the filter from water medium in the filter increases by amplifying external magnetic field intensity, raising filter length, and recycle number until the filter is overloaded.Öğe Estimation of Magnetization Properties of the Ferromagnetic Poly-Granular Beds(Taylor & Francis Inc, 2010) Karadag, Teoman; Yildiz, Zehra; Sarimeseli, Ayse; Abbasov, TeymurazIn this article, magnetizing properties of the packed beds that are constructed from the mixture of the ferromagnetic spheres of various sizes, pieces of wires and chips are investigated both experimentally and theoretically in order to determine the effect of the volumetric packing factor on the magnetizing properties of the bed. The average magnetizing curve has been determined by maintaining the external homogeneous magnetic field (H) higher than 150kA/m.Öğe INVESTIGATION OF INFRARED DRYING BEHAVIOUR OF SPINACH LEAVES USING ANN METHODOLOGY AND DRIED PRODUCT QUALITY(Polska Akad Nauk, Polish Acad Sciences, 2015) Sarimeseli, Ayse; Yuceer, MehmetEffects of infrared power output and sample mass on drying behaviour, colour parameters, ascorbic acid degradation, rehydration characteristics and some sensory scores of spinach leaves were investigated. Within both of the range of the infrared power outputs, 300-500 W, and sample amounts, 15-60 g, moisture content of the leaves was reduced from 6.0 to 0.1 +/-(0.01) kg water/kg dry base value. It was recorded that drying times of the spinach leaves varied between 3.5-10 min for constant sample amount, and 4-16.5 min for constant power output. Experimental drying data obtained were successfully investigated by using artificial neural network methodology. Some changes were recorded in the quality parameters of the dried leaves, and acceptable sensory scores for the dried leaves were observed in all of the experimental conditions.Öğe Microwave drying characteristics of coriander (Coriandrum sativum L.) leaves(Pergamon-Elsevier Science Ltd, 2011) Sarimeseli, AyseEffect of microwave power output on effective moisture diffusivity, colour parameters and rehydration characteristics of coriander leaves (Coriandrum sativum L) was investigated by using a microwave drier. Within the range of microwave power values, 180-360W, effective moisture diffusivities were found to be 6.3 x 10(-11)-2.19 x 10(-10) m(2)/s and the result could successfully be presented with the model suggested by Midilli et al. No significant differences in the colour parameters were obtained between the fresh and dried samples and the changes in their values were not dependent on the power outputs of the microwave drier. The highest rehydration capacity was recorded for the samples dried at 180W and lowest at 900W. (C) 2010 Elsevier Ltd. All rights reserved.Öğe MODELING MICROWAVE DRYING KINETICS OF THYME (THYMUS VULGARIS L.) LEAVES USING ANN METHODOLOGY AND DRIED PRODUCT QUALITY(Wiley-Hindawi, 2014) Sarimeseli, Ayse; Coskun, Mehmet Ali; Yuceer, MehmetEffects of microwave power output and sample mass on drying behavior, color parameters, rehydration characteristics and some sensory scores of thyme leaves were investigated. Within the range of the microwave power outputs, 180-900 W, and sample amounts, 25-100 g, moisture content of the leaves were reduced to 0.1 +/- (0.01) from 4.05 kg water/kg dry base value. Drying times of the leaves were found to be varying between 3.5 and 15.5 min for constant sample amount, and 6.5 and 20.5 min for constant power output. Experimental drying data obtained were successfully modeled using artificial neural networks methodology. Statistical values of the test data were found to be 0.9999, 4.0937 and 0.025 for R-square, MAPE (%) and RMSE, respectively. Some changes were recorded in the quality parameters, and acceptable sensory scores for the dried leaves were observed in all of the experimental conditions (P < 0.05).Öğe Poly(2-hydroxyethyl methacrylate)/boric acid composite hydrogel as soft contact lens material: Thermal, optical, rheological, and enhanced antibacterial properties(Wiley, 2018) Ulu, Ahmet; Balcioglu, Sevgi; Birhanli, Emre; Sarimeseli, Ayse; Keskin, Rukiye; Koytepe, Suleyman; Ates, BurhanThe present work proposes to fabricate a composite hydrogel material that well characterized, transparent, biocompatible, and self-antibacterial as potential soft contact lens material. For this purpose, poly(2-hydroxyethyl methacrylate) (PHEMA)/boric acid (BA) composite hydrogels were successfully prepared by chemical crosslinking with BA through in situ polymerization using different BA ratios between 1 and 10% w/w. Afterward, the compositions, thermal stability, transparence, oxygen permeability, water uptake capacity, swelling ratio as well as morphological and rheological properties, in vitro degradability, in vitro cytotoxicity, and antibacterial properties of the all prepared materials were analyzed using a series of different techniques. The thermal stability, hydrophilicity, water uptake, oxygen permeability gradually increased depending ratio of BA, which is desirable for biomaterial. While the transparence and refractive index decreased, the composite hydrogels, except for BA content of 10 wt %, maintained enough transparency to be used for contact lens. In addition, PHEMA/BA composite hydrogels exhibited good cytocompatibility (PHEMA-1%BA and PHEMA-3%BA) and excellent antibacterial activity against Gram-positive (Staphylococcus aureus and Enterococcus faecium) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacteria. Overall, the results demonstrated that the obtained PHEMA/BA composite hydrogels could be considered as self-antibacterial contact lens and a potential composite biomaterial for other applications. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46575.
