Person: TAŞKIN, ONUR
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TAŞKIN
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ONUR
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Publication Physicochemical and morphological properties of european cranberrybush powder manufactured by freeze drying(Taylor, 2021-01-01) Taşkın, Onur; İzli, Gökçen; İzli, Nazmi; TAŞKIN, ONUR; İZLİ, NAZMİ; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0002-5741-8841; R-7996-2016; AAH-5018-2021This study investigated the rehydration, water activity, pH, Brix, color, bulk density, tapped density, flowability, cohesiveness, wettability, solubility values, and microstructures of freeze-dried European cranberrybush powders. Additionally, experimental freeze-drying data were coupled to nine thin-layer models, and the logarithmic model was chosen to estimate the moisture ratio of European cranberrybush. The pH and Brix values were measured between 3.0-3.2 and 40.33-52.00 for different powder sizes, respectively. A significant difference was observed for the water activity values of different powders that were classified into different powder sizes (P < .05). Moreover, it was identified that all powders exhibited "low" cohesiveness and "fair" flowability. However, the results showed that the highest bulk density (0.440 g/ml), tapped density (0.563 g/ml), wettability (4386 s) and solubility (264 s) were obtained in the samples with a ">500 mu m" powder size. According to the all scanning electron microscopy images, skeletal-like structures formed on the surfaces.Publication Application of different drying techniques on peach puree(Ankara Üniversitesi, 2021-01-01) Polat, Ahmet; Taşkın, Onur; İzli, Nazmi; POLAT, AHMET; TAŞKIN, ONUR; İZLİ, NAZMİ; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü; 0000-0002-5741-8841; 0000-0002-2084-4660; 0000-0003-1673-7165; R-7996-2016; AAG-8333-2021; AAH-5018-2021In this study, six various applications were performed to dry peach puree using methods of convective drying (CD), microwave drying (MW1, MW2 and MW3) and combined convective-pulsed microwave drying (CD+MW2 and CD+MW3). Effect of drying on time, color, pH, Brix and micrographs were evaluated. The data of total drying time revealed that the maximum value was belonged to "CD" (220 min). The minimum value was obtained by "MW1" (10 min). By comparison of total color change (.E), the highest values were achieved with "CD+MW3", whereas the lowest values were achieved with "MW2". Under all drying applications, the maximum pH and Brix changes were observed with "CD+MW2". From the microstructure, the samples to which the microwave method was applied displayed a collapsed structure as to the sample dried by the convective method.Publication Effect of microwave, infrared and freeze drying methods on drying kinetics, effective moisture diffusivity and color properties of turmeric(Galenos Publ House, 2019-01-01) Taşkın, Onur; TAŞKIN, ONUR; İzli, Nazmi; İZLİ, NAZMİ; Bursa Uludağ Üniversitesi/Ziraat Fakültesi.; 0000-0002-5741-8841; R-7996-2016; AAH-5018-2021In the present research, effect of methods that use the microwave (90, 160 and 350 W), infrared (60, 70 and 80 degrees C), and freeze drying for turmeric samples on the drying kinetics, effective moisture diffusivity and color were analyzed. Also ten distinct thin layer models of drying were used to predict their kinetics. Depending on the evaluation of the statistical tests, models of Midilli et al and Wang & Singh models were found the optimum ones for explaining drying characteristics of turmeric. Among the used methods, the fastest and slowest drying time was 65 min with microwave drying (350 W) and 600 min with freeze drying, respectively. The calculations demonstrate that the maximum effective moisture diffusivity value is obtained in microwave drying (350 W). Our study shows that although the freeze-drying increases the drying time, it showed closest color results against to fresh samples. In conclusion, microwave, infrared and freeze drying methods applied to turmeric should improve with the combined drying applications.Publication Mineral content of leaves, stalks and fruits of european cranberrybush plant (viburnum opulus l.)(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2019-01-01) Taşkın, Onur; TAŞKIN, ONUR; Aşık, Barış Bülent; AŞIK, BARIŞ BÜLENT; İzli, Nazmi; İZLİ, NAZMİ; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Toprak Bilimi ve Bitki Besleme Bölümü.; 0000-0002-5741-8841; AAH-5018-2021; R-7996-2016In this study, the protein and mineral contents of fruit, stalks and leaves of naturally grown European Cranberrybush were investigated. The macro element contents of European Cranberrybush fruits, stalks and leaves were determined as 0.52-0.51-1.94% Nitrogen (N), 0.09-0.04-0.42% Phosphorus (P), 0.93-0.10-1.17%, Potassium (K), 0.21-0.48-2.44% Calcium (Ca), 0.05-0.04-0.37% Magnesium (Mg) and 0.04-0.06-0.09% Sodium (Na), respectively. The micro elements were found 12.81-215.83-436.35 mg kg(-1) Iron (Fe), 5.69-12.38-8.05 mg kg(-1) Copper (Cu), 6.45-19.97-25.81 mg kg(-1) Zinc (Zn) and 1.56-26.62-40.47 mg kg(-1) Mangan (Mn), respectively. Protein results of fruits, stalks and leaves were determined as 0.52%, 0.51% and 12.10%, respectively. The results showed that the protein and mineral contents of the leaves (except copper) were higher than the fruit and the leaves, and the alternative evaluation possibilities of leaves should be investigated.Publication Technical and economic evaluation of energy production from wind in İstanbul and surrounds(Univ Cape Town, Energy Res Centre, 2015-11-01) Vardar, Ali; Taşkın, Onur; VARDAR, ALİ; TAŞKIN, ONUR; Uludağ Üniversitesi/Mühendislik Fakültesi/Biyosistem Mühendislik Bölümü; 0000-0001-6349-9687; 0000-0002-5741-8841; AAH-5018-2021; AAH-5008-2021Istanbul is located in the northwest part of Turkey and has the greatest population of any city in the country. Istanbul and its surroundings were researched for wind potential. Energy production from wind was evaluated technically and economically in this study. Corlu, Kumkoy and Sile sites were examined. Other sites in the same region (Goztepe, Kirecburnu, Bahcekoy, Florya and Kartal) were also evaluated but the results were not satisfactory, and for this reason, these sites were not examined in this study. When we checked daily, monthly and yearly wind speed values and frequency distributions, the wind energy potential of Corlu, Kumkoy and Sile were greater than other sites. Corlu, Kumkoy and especially Sile's wind speed data are statistically decreasing. A Nordex N117 91m hub height wind turbine can produce 6099 MWh in Corlu, 6459 MWh in Sile, 7265 MWh in Kumkoy. A Nordex N117 91m hub height wind turbine can produce 6471 MWh in Corlu, 7439 MWh in Sile and 8175 MWh in Kumkoy. The energy costs were calculated by the average of 36 years of wind measurement data using Nordex N117 turbines. Energy costs with Nordex N117 91 m and 140 m hub height in Corlu, Sile and Kumkoy are 0.025- 0,027 US$/ KWh, 0.022- 0,025 US$/ KWh, 0.020- 0,023 US$/ KWh, respectively.Publication Rehydration, pH, brix, titrable acidity and color variations of infrared and microwave dried European Cranberrybush(Agrimedia Gmbh, 2019-01-01) Taşkın, Onur; İzli, Nazmi; İzli, Gökçen; TAŞKIN, ONUR; İZLİ, NAZMİ; İzli, Gökçen; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; 0000-0002-5741-8841; AAR-2849-2020; AAH-5018-2021; R-7996-2016This work aims at investigating rehydration, pH, brix, titrable acidity and color in infrared and microwave drying of European Cranberrybush. Drying experiments were carried out at infrared temperature of 60, 70 and 80 degrees C and microwave power of 120 and 350 W. The results showed that both the infrared temperature and microwave power influenced the drying time. The slope of the higher infrared temperature or microwave power was found steeper in drying rate. Under the all drying experiments, good rehydration ratio was obtained. The maximum change of the brix and titrable acidity were determined by 350 W. In terms of pH, infrared dried at 60 degrees C samples had higher pH than fresh samples. By comparison colorimetric parameters (L*, a*, b* and C), being highest values were reached at 80 degrees C, whereas the lowest values were achieved at 350 W. In addition, the total color change (Delta E) of European Cranberrybush dried at infrared and microwave methods were found significantly different (P < 0.05).Publication Developing wind-concentrator systems for the use of wind turbines in areas with low wind-speed potentials(Wiley-V C H Verlag Gmbh, 2015-12-01) Vardar, Ali; Eker, Bülent; Kurtulmuş, Ferhat; Taşkın, Onur; VARDAR, ALİ; KURTULMUŞ, FERHAT; TAŞKIN, ONUR; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü/Tarımsal Enerji Sistemleri.; Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü/Tarım Makina Sistemleri.; 0000-0001-6349-9687; 0000-0002-5741-8841; AAH-5008-2021; AAH-5018-2021; R-8053-2016The ability to supply energy in rural areas and in agricultural plants with renewable energy technologies, especially wind energy, is advantageous in terms of a sustainable environment and the increasing cost of energy. Today, wind turbines are used actively in many areas, some of which are for commercial purposes. Small-scale wind turbines that produce electricity directly have the necessary characteristics for use in agricultural plants. In this study, wind-concentrator systems for small-scale wind turbines that can be used in agricultural electrification applications have been designed for geographical areas where the wind-speed potential is low. Three different concentrator systems have been designed to make use of low wind-speed potentials and obtain high power values with relatively small rotor diameters. The three different designs have been produced as prototypes, and power values of 324-503 Wm(-2) (at 5 ms(-1) wind speed) can be obtained by concentrating the wind. The efficiency, power, energy production capacity, and economic elements of the models were determined, and the possible results for agricultural plants have been assessed. According to these assessments, the efficiency values are 71 and 90% for wind speed and 410 and 600% for wind power. The energy production capacities are a maximum of 6462, 5193, and 8226 kWhm(-2) per year for the conical wind-concentrator system, the wind-concentrator system with a panel, and the wind-concentrator system without a panel, respectively. If the energy production cost per unit of these systems is considered, these systems are not economical. Therefore, these systems must be produced on a large scale to become economical, and their size must be enlarged to reduce the cost. Consequently, the potential power values per unit area and the potential energy values per unit produced by the wind-concentrator systems will contribute to the production of more energy than that achieved by current wind turbines.Publication Solar energy potential and facilities of use in kahramanmaras province(Kahramanmaras Sutcu Imam Univ, 2014-01-01) Korucu, Tayfun; Taşkın, Onur; TAŞKIN, ONUR; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Biyosistem Mühendisliği Bölümü.; 0000-0002-5741-8841; AAH-5018-2021In order to prevent inaccurate investments, it is very important to perform studies which are based on the measurements of regional radiant intensity and sunshine duration before starting the construction of the plants or applications based upon the usage of solar energy which is a renewable energy source. In this study, solar energy potential of center and districts of Kahramanmaras which is a border city to two regions (Mediterranean Region and Southeastern Anatolia Region) that have the highest solar energy potential in our country, collected data by measurement station's pyranometers, has been discussed. It has been determined that city of Kahramanmaras has total annual 2918 hours of sunshine duration and 1608 kWh m(-2) radiant intensity. It has been concluded that from among districts, Pazarcik has the longest annual sunshine duration and Nurhak has the highest radiant intensity. It has been observed that high solar energy potential in city of Kahramanmaras is not being used sufficiently other than obtaining hot water.