Teknik Bilimler Meslek Yüksekokulu Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.13091/1629
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Article Determination of Thermotolerant Campylobacter Spp. by Viability-Qpcr in a Poultry Slaughterhouse and in Retail(Eugen Ulmer Gmbh Co, 2021) Telli, E.; Uçar, G.; Sönmez, G.; Telli, N.; Türkal, G.; Doğruer, Y.This study aimed to evaluate the viability of thermotolerant Campylobacter spp. in chicken carcasses during the slaughter process (n = 150) and at retail level (n = 72). All samples were analysed by quantitative PCR (qPCR), propidium monoazide (PMA)-treated qPCR, and direct plate counting (DPC). The quantitative comparisons were performed for assessing viability and culturability according to the values of the samples that were found to be positive in all methods. Due to the underestimation of viable but unculturable (VBNC) or dead cells, PMA-untreated samples, either at different slaughter stages or at retail level, had a higher positivity and quantity rate (p < 0.05) than the PMA-treated and DPC samples. Across the slaughter line, the above mentioned three methods revealed the highest positivity and quantity level during the evisceration stage. After the water-chilling and storage phases, positivity and quantity rates were not comparable as PMA-qPCR and DPC failed to detect the level of contamination not only in terms of cultivability but also in terms of viability as a result of compromised membrane integrity at low temperatures. In conclusion, recording of Campylobacter spp. during the chicken slaughter process by PMA-treated qPCR would provide more realistic quantitative data for poultry meat contamination.Article Determining the Statistical Relationship Between the S20 Brittleness Index and Schmidt Hardness of Rocks(Konya Technical University, 2019) Özşen, Hakan; Uysal, Abdullah; Dursun, Arif EmreDetermination of the brittleness of rocks is considered as an important preliminary design tool in different mining applications. The brittleness value is an important rock parameter used in the excavation and drilling of rocks. Schmidt's hardness is an inexpensive and easy-to-use surface hardness measure that is commonly used to determine the mechanical properties of rocks, such as strength, cuttability (linear and circular), and permeability. In this study, the S20 brittleness index values were determined by using NTNU model to determine the brittleness values of the rocks which was developed by Blindheim and Bruland (1998). The aim of this study was to investigate the relationship between the S20 brittleness index and Schmidt hardness (RL) values statistically. For this purpose, Schmidt hardness tests and S20 brittleness index tests on 7 different rock samples with different strength properties were performed. Schmidt hardness test values and S20 brittleness index values were statistically evaluated and correlated with SPSS. As a result of this evaluation, it was determined that there was a strong correlation between Schmidt hardness and S20 brittleness index values.Article Citation - Scopus: 1Effect of the Tumbling Process and Kappa-Carrageenan Usage on the Quality Characteristics of Meat Loaf(POLISH SOC VETERINARY SCIENCES EDITORIAL OFFICE, 2020) Telli, Nihat; Telli, Arife Ezgi; Biçer, Yusuf; Cebirbay, Muhammet Ali; Tekinşen, Kemal Kaan; Köseoğlu, İsmail Erim; Güner, AhmetIn this study the authors aimed to determine the effects of the tumbling process and carrageenan usage on the physicochemical, microbiological and sensory properties of meat loaves, which are uncommon in Turkey and only produced at a sub-industrial level. The meat loaves were produced from beef (rib and chuck regions) and layer hen meat and partitioned equally into three groups. The first group served as a control group, whereas the second and third groups were processed by tumbling for 1 and 2 h, respectively. The tumbling programme involved 20 millibar pressure, with 3 min of operation and 1 min of stoppage. After tumbling, each group was divided into two equal parts, followed by the addition of 1% carrageenan to one part of each. This production was repeated, and the meat loaves were stored at 4 degrees C. Physicochemical, microbiological and sensory analyses of the final products were performed on the 0th, 3rd, 7th, 12th and 15th day of storage for assessing the product quality. The utilisation of carrageenan increased the beef and chicken meat loaves by 0.69% and 1.85%, respectively. The carrageenan reduced cooking loss by an average of 5% relative to the control group. The cutting and sensory properties of the groups produced by both tumbling and the addition of carrageenan exhibit higher scores than the other groups (P < 0.05). The average of the pH, aw, salt%, dry matter%, ash% and fat% in the beef meat loaves are 6.26, 0.938, 0.988, 31.52, 2.30 and 4.64, respectively, whereas corresponding values for chicken meat loaves are 6.26, 0.927, 1.23, 35.80, 2.18 and 7.38, respectively for the control groups. Yeast-mould growth was absent in all samples, containing 2.90-6.05 log(10) CFU/g TMAB, 2.00-4.27 log(10) CFU/g Micrococcus-Staphylococcus and 0-3.62 log(10 )CFU/g Enterobacteriaceae.Article Citation - WoS: 8Citation - Scopus: 9An Experimental Performance Comparison of Newtonian and Non-Newtonian Fluids on a Centrifugal Blood Pump(Sage Publications Ltd, 2022) Önder, Ahmet; Yapıcı, Rafet; İncebay, ÖmerThe use of substitute fluid with similar rheological properties instead of blood is important due to ethical concerns and high blood volume consumption in pump performance test before clinical applications. The performance of a centrifugal blood pump with hydrodynamic journal bearing is experimentally tested using Newtonian 40% aqueous glycerin solution (GS) and non-Newtonian aqueous xanthan gum solution of 600 ppm (XGS) as working fluids. Experiments are performed at four different rotational speeds which are 2700, 3000, 3300, and 3600 rpm; experiments using GS reach between 8.5% and 37.2% higher head curve than experiments using the XGS for every rotational speed. It was observed that as the rotational speed and flow rate increase, the head curve difference between GS and XGS decreases. This result can be attributed to the friction reduction effect when using XGS in experiments at high rotation speed and high flow rate. Moreover, due to different fluid viscosities, differences in hydraulic efficiency were observed for both fluids. This study reveals that the use of Newtonian fluids as working fluids is not sufficient to determine the actual performance of a blood pump, and the performance effects of non-Newtonian fluids are remarkably important in pump performance optimizations.Article Gama Işınları ile Işınlanmış Yeni Bir Isoquinoline Sulfonamide (c17h20brno3s) Maddesinin X-bant Epr Çalışması(Konya Technical University, 2020) Karataş, Özgül; Ceylan, YusufKaynaşık bir heteroksil bileşiği olan yeni epoxyisoquinoline sulfonamide maddesi (I), (4aS,7S,8aR)-8a-bromo-7-methyl-2-tosyl-2,3,4,7,8,8a-hexahydro-1H-4a,7-epoxyisoquinoline, yeşil ve kademeli bir süreç ile sentezlendi. Daha sonra doz hızı of 0.981 kGy/h olan 60Co-gama (?) kaynağı ile oda sıcaklığında 72 saat ışınlandı. I bileşiğinin EPR spektrumları, 150-340 K sıcaklık aralığında X-bant EPR spektrometresi kullanılarak manyetik alanda üç farklı yönelimde kaydedildi. Elde edilen sonuçlara göre, örneğe ait izotropik spektrumların olduğu görüldü ve C ?H_3 H radikalinin varlığı gözlemlendi. Sonuçlar, Bruker WinEPR-Simfonia programı kullanılarak fit edildi. Radikalin aşırı ince yapı sabiti (A) ile deneysel izotropik spektroskopik değeri (g) hesaplandı.Article Investigation of the Chemical Characteristics and Oxidative Stability of Some Commercial Cold-Pressed Oils(Konya Technical University, 2021) Ayyıldız, Hamide Filiz; Topkafa, Mustafa; Sherazi, Syed Tufail Hussain; Mahesar, Sarfaraz Ahmed; Kara, HüseyinIn this study, the chemical composition and oxidative stability of cold-pressed flaxseed, black seed, pumpkin seed, walnut seed, and poppy seed oils were examined. The results showed that the seed oils contained appreciable amounts of unsaturated fatty acids (above 79 %). Polyunsaturated fatty acids, particularly linoleic acids were dominant, with values ranging from 53.24 % - 71.37 % of the total amount of fatty acids except for pumpkin seed oil. Tocols content was found to be between ~ 490-932 mg kg-1, and the flaxseed oil exhibited the highest levels of total tocopherols (977.47 mg kg-1) under the experimental conditions. While, the highest PV was found in walnut seed oil (2.81 meq O2 kg-1), and the highest content of FFAs was reported for flaxseed oil (1.82 %). OSI values were 4.15, 3.57, 4.31, 3.98 and 4.92 h for the flaxseed, black seed, pumpkin seed, walnut seed, and poppy seed oils, respectively. The obtained data suggest that the seed oils in this study may serve as special dietary sources.Article Citation - WoS: 2Citation - Scopus: 3Isolation and Antimicrobial Resistance of Vancomycin Resistant Enterococcus Spp. (vre) and Methicillin-Resistant S. Aureus (mrsa) on Beef and Chicken Meat, and Workers Hands From Slaughterhouses and Retail Shops in Turkey(Hellenic Veterinary Medical Soc, 2021) Telli, Nihat; Telli, A. Ezgi; Biçer, Yusuf; Türkal, Gamze; Uçar, GürkanThe objectives of this study were to determine the presence and antimicrobial resistance of Methicillin Resistant Staphylococcus aureus (MRSA) and Vancomycin Resistant Enterococci (VRE) on beef and chicken carcasses and meat, and workers hands' at processing time from a cattle and a poultry slaughterhouse, and beef and chicken meat at retail level. Disk diffusion method was used to determine the antimicrobial resistance profile of the Enterococcus spp. and S. aureus isolates. Minimum Inhibitory Concentration (MIC) values were determined for vancomycin and oxacillin resistance. Finally, conventional PCR was performed to determine the presence of the mecA and vanA resistance genes in isolates classified resistant to oxacillin and vancomycin according to MIC values. S. aureus and Enterococcus faecium isolated from 17 (17%) and eight (8%) samples, respectively. E. faecalis was not detected in any sample. The highest resistance rates were to ampicillin (3/5, 60 %) and penicillin G (5/5, 100 %) in MRSA and tetracycline (4/5, 80 %) in VRE isolates. While the mecA gene was detected in all MRSA isolates, vanA gene was not detected in any of the phenotypically vancomycin resistant E. faecium isolates. The present study provides data for multiple antimicrobial resistance and presence of VRE and MRSA isolated from an ongoing surveillance in humans, livestock and poultry in Turkey.Article Citation - WoS: 10Citation - Scopus: 9Land Reallocation Model With Simulated Annealing Algorithm(TAYLOR & FRANCIS LTD, 2021) Ertunç, Ela; Uyan, Mevlüt; Tongur, VahitLand consolidation project has many stages. Land reallocation is the most considerable stage in which many factors play a role and forms the basis of this project. In this study, a new optimisation-based reallocation model has been developed to realise block reallocation by evaluating the requests of landowners. The reallocation according to the developed method also reset the block spaces automatically. The most powerful aspect of the method is that while the reallocation phase in land consolidation projects takes weeks and months, this method can be done in minutes. This method contributes to projects in terms of time and cost.Article Sandviç Tasarımı İçerisindeki Termoelektrik Jeneratörde Elekrtrik Enerjisinin Analizi(Konya Technical University, 2020) Terzioğlu, Hakan; Ağaçayak, Abdullah CemSon zamanlarda enerjinin gittikçe artan öneminden dolayı, araştırmacılar ve sanayi, enerji sisteminin verimliliğini artırarak enerjiyi daha iyi yönetmek istemektedirler. Bu nedenle elektrik enerjisini sağlamak için alternatif enerji kaynaklarına yönelim başlamıştır. Alternatif enerji kaynaklarından ise yenilenebilir enerji kaynaklarına olan ilgi her geçen gün artmaktadır. Güneş, Rüzgâr ve Termal kaynaklar yenilenebilir enerji kaynaklarının öne çıkanlarıdır. Günümüzde termal kaynaklardan seracılık, balık yetiştirme, termal tesisler, şehir ısıtması ve elektrik üretimi gibi birçok alanda faydalanmaktayız. Günümüzde termal suyu kaynağından faydalandığımız yere taşırken, etrafına yaydığı ısıyı elektrik enerjisine dönüştürebileceğimiz bilinmektedir. Bu çalışmada yenilenebilir enerji kaynaklarından termal kaynaklar kullanılarak, elektrik üretiminde termal suyun taşındığı malzemenin türünün ve Termoelektrik Jeneratörün (TEG) yerleşim şeklinin farklı iki Termoelektrik Modülün (TEM) verimi üzerindeki etkisi incelenmiştir. Sıcak ve soğuk su Bakır, Alüminyum ve Pirinç malzemelerinden oluşturduğumuz sandviç bloklardan geçirilerek TEG’de üretilen güç üzerindeki analizi gerçekleştirilmiştir. TEG olarak da TEC1-12706 ve TEC1-12710 malzemeleri kullanılmıştır. Yapılan deneysel çalışmalar sonucunda termal suyun geçtiği malzemenin türünün ve sıcak/soğuk suyun sandviç plakalardan geçme sırasının hem TEC1-12706’nın hem de TEC1-12710’nun ürettiği güç üzerinde etkili olduğu görülmüştür.Article Citation - WoS: 2Citation - Scopus: 2Wind-Effected Dynamic Quadrotor Route Planning With Metaheuristic Methods in Different Weather Conditions(Univ Suceava, Fac Electrical Eng, 2021) İncekara, Hayri; Selek, MuratIn cases where Quadrotors, which are increasingly important rotary-wing Unmanned Aerial Vehicles (UAVs), are required to visit more than one location, route planning should be done to reduce the cost of flight and increase the efficiency. In this study, it is aimed to reduce the flight time and increase the efficiency of Quadrotor Route Planning (QRP) based on the changes in wind speed and wind angle. To achieve this, a dynamic QRP application which can generate routes which are suitable for changing environmental conditions by using instantaneous wind data and real location coordinates has been developed. In this application, Genetic Algorithm (GA), Tabu Search and Traveling Salesman Problem (TSP) with GA metaheuristic methods were used comparatively to optimize QRP according to flight time. Among these methods, the TSP with GA method is the metaheuristic method that gave the most optimal results. When the results are examined, it is seen that wind effect dynamic QRP that uses TSP and GA method provides up to 26% improvements in flight time compared to Standard QRP that uses TSP with GA method.
