Journal of Advanced Research in Natural and Applied Sciences最新文献

{"title":"Uncovering the Hydrocracking Efficiency of Iron-Based Catalysts: A Novel Approach to Asphaltene Transformation in Iranian Heavy Oil","authors":"Kadir YILMAZ, Savaş GÜRDAL, Muzaffer YAŞAR","doi":"10.28979/jarnas.1381226","DOIUrl":"https://doi.org/10.28979/jarnas.1381226","url":null,"abstract":"In the quest for optimal asphaltene conversion, this study investigated a range of cost-effective and easily accessible catalyst precursors, targeting both high yields of lighter products and minimal coke formation. The hydrocracking experiments were conducted within a 10 ml bomb-type reactor equipped with an reciprocating stirrer operating at a reciprocation rate of 200 times per minute. The experiments were performed at a temperature of 425°C for a duration of 90 minutes, with an initial hydrogen pressure of 100 bar. The outcomes of each experiment were assessed in terms of liquid products, coke production and C5- gas products. To analyze the Iranian heavy asphaltene, Nuclear Magnetic Resonance (1H NMR), Gel Permeation Chromatography (GPC) and elemental analysis were employed. Gas products were charac-terized using Gas Chromatography (GC). The investigation aimed to identify the catalyst precursor mix-ture that would maximize asphaltene conversion while minimizing coke production. A series of catalyst precursors, encompassing FeSO4·H2O, its binary mixtures with metal oxides (Fe2O3, Al2O3, CaO, SiO2), and combinations of Fe2O3, Al2O3, and SiO2 with elemental sulfur, were evaluated. The experimental results demonstrated that the toluene-soluble fraction (TSF), which includes the middle distillate portion, can be increased to a maximum of 56% while concurrently reducing the coke yield to 19%, down from the initial 36.9% when no precursor was used.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"53 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136346478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On the Synchronizability of Quadratic Integrate and Fire Neurons","authors":"Koray ÇİFTÇİ","doi":"10.28979/jarnas.1140961","DOIUrl":"https://doi.org/10.28979/jarnas.1140961","url":null,"abstract":"Synchronization is a property of complex systems which manifests itself as the emergence of collective behaviour from local interactions. In neural networks, synchronization is observed in both computational models and experimental studies. Here, we investigate the synchronization properties of quadratic integrate and fire (QIF) neurons, from a computational modelling perspective. Analytical results concerning the spiking frequency of the QIF neurons and the relationships between membrane voltage and phase are presented. We give simulation results for a simple network of QIF neurons demonstrating the effects of different types of coupling among the members of the network.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"13 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135977025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uydu Verileri ve CBS ile Van Gölü Klorofil-a Dinamiklerinin İzlenmesi","authors":"Ufuk TARI, Nazlı OLĞUN KIYAK","doi":"10.28979/jarnas.1317247","DOIUrl":"https://doi.org/10.28979/jarnas.1317247","url":null,"abstract":"Dünyanın en büyük alkali gölü olan Van Gölü, fitoplankton (mikro-alg) içeriği açısından düşük organik üretimli (oligotrofik) bir yapıya sahiptir. Besin zincirinin ilk halkasını oluşturan fitoplankton yoğunluğunun belirlenmesinde en sık kullanılan parametrelerden biri klorofil-a pigmentidir. Fitoplankton ve dolayısıyla klorofil-a yoğunlaşmaları aynı zamanda su kalitesinin evsel, tarımsal ve sanayi atıkları gibi insan kaynaklı kirliliğin takibinde de kullanılmaktadır. Bu çalışmada, Van Gölü’ndeki klorofil-a konsantrasyonlarının dağılım haritaları literatürdeki yersel ölçüm verileri (spektrofotometrik yöntem ile), uydu verileri ve Coğrafi Bilgi Sistemi (CBS) metotları kullanılarak oluşturulmuş ve uydu verilerinin Van Gölü’ndeki temsiliyet kapasitesi değerlendirilmiştir. Buna göre, klorofil-a dağılımları mekansal olarak değişiklik göstermektedir. Gölün kuzeydoğu ve doğusundaki klorofil-a yoğunluğunun batı kesimine göre oldukça yüksek olduğunu görülmektedir. 2014 yılı klorofil-a yersel ölçmelerden elde edilen klorofil-a değerleri ile Landsat/OLI algılayıcısına ait mavi bandın (562-443 nm arası dalga boyu) yeşil banda (562-482 nm arası dalga boyu) yansıma oranı kullanılarak elde edilen klorofil-a konsantrasyonunu ölçme hatalarının içerisinde kaldığı (karesel ortalama hata) ve Landsat/OLI algılayıcısının Van Gölü’ndeki klorofil-a konsantrasyonlarını haritalamak için uygun olduğu belirlenmiştir. Ayrıca, Van Gölü için uydu verisi öncesinde elde edilmiş diğer iki veri seti olan 1984 ve 2002 klorofil-a verileri için de jeo-istatistik analizler gerçekleştirilmiştir. Bu çalışma ile birlikte, pek çok çevresel ve iklimsel değişimle etkilenen Van Gölü’ndeki klorofil-a değişimlerin izlenmesinde uydu verilerinin temsiliyeti ortaya konmuştur.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"96 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136157302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion Behaviours’ Investigation of Carbide Coatings Developed for Sulphuric Acid Recovery Systems","authors":"Erhan ÖZKAN","doi":"10.28979/jarnas.1318159","DOIUrl":"https://doi.org/10.28979/jarnas.1318159","url":null,"abstract":"In this study, corrosion resistance of cobalt and nickel reinforced tungsten carbide coatings applied to low carbon stainless steel material surfaces to reduce corrosion-induced losses in sulphuric acid recovery systems were investi-gated. During the recovery of sulphuric acid, aggressive sulphur systems in the baths cause the metal surface to dissolve and therefore a high amount of material loss occurs. In order to minimize corrosion induced material loss, 316 L stainless steel surfaces were coated with an interlayer of 95% nickel and 5% aluminium alloy, and then tungsten carbide coatings were synthesized on the surfaces of substrate materials reinforced with 13% cobalt and 13% nickel, respectively by thermal spraying method to further reduce the corrosion rate. Characterization of the produced coatings were carried out by X-ray diffraction (XRD), scanning electron microscope (SEM), optical microscope, image analyser, and surface roughness device. The standard potentiodynamic polarization character-istics of the coatings for 1M H2SO4 solution at room temperature were investigated with a potentiostat/galvanostat device. As the obtained results, nickel reinforced tungsten carbide coatings with nickel aluminium interlayer showed the highest corrosion resistance against sulfuric acid environment. With the data from this study, it was possible to observe the effects on the corrosion behaviour of HVOF carbide coatings.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135387464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Yapı Bilgi Modellemesi ve Coğrafi Bilgi Sistemleri Entegrasyonu için IFC’den CityGML ve CityJSON Veri Formatlarına Dönüşümün İncelenmesi","authors":"Özlem KORKMAZ, Melih BAŞARANER","doi":"10.28979/jarnas.1348718","DOIUrl":"https://doi.org/10.28979/jarnas.1348718","url":null,"abstract":"Yapı bilgi modellemesi (YBM) ve coğrafi bilgi sistemleri (CBS) entegrasyonu; yapı ve tesis planlama ve yönetimi, akıllı şehirler ve mekânsal dijital ikiz gibi uygulamalar için kritik öneme sahiptir. YBM, yapı yaşam döngüsü boyunca zengin geometrik ve semantik bilgilere sahipken, CBS; mekânsal modelleme, analiz ve görselleştirme yetenekleri sağlar. Bu nedenle, YBM ve CBS iç ve dış mekân bağlamında birbirini tamamlayan temel sistemlerdir. Öte yandan, uygulama odakları, mekânsal kapsamlar, koordinat sistemleri, semantik ve geometrik temsiller ve ayrıntı düzeyleri açısından farklılıklara sahip olmaları, bu iki sistemin entegrasyonunda zorluklar meydana getirmektedir. Entegrasyon için veri düzeyinde geometrik dönüşüm ve semantik aktarım yapılmalıdır. Geometrik açıdan temsil dönüştürme, coğrafi referanslama ve ayrıntı düzeyi dönüşümü gereklidir. Semantik açıdan ise öznitelik çıkarımı, semantik eşleme, semantik çıkarım ve semantik birleştirme gibi farklı yaklaşımlar uygulanarak semantik aktarım gerçekleştirilebilir. YBM verileri için genel olarak endüstri temel sınıfları (IFC), CBS verileri için ise CityGML, CityJSON veya shape dosyası formatı kullanılmaktadır. Entegrasyon için bazı teknikler ve teknolojiler mevcut olsa da halen çözülmemiş sorunlar mevcuttur. Bu nedenle, YBM ve CBS entegrasyonu ve veri değişim formatları aktif araştırma konusu olmaya devam etmektedir. CityJSON’ın kent modellerini 3B temsil etmek için kullanılan yeni bir veri standardı olması nedeniyle veri değişimi için uygulanmasına yönelik çok fazla çalışma bulunmamaktadır. Ayrıca, CityGML’in hafif versiyonu olarak oluşturulan CityJSON’ın uygulamalarda CityGML’den farkı merak konusudur. Bu çalışmada, IFC formatındaki üç farklı yapıya ait YBM veri seti, geometrik dönüşüm ve semantik aktarım ile Safe FME Workbench yazılımı kullanılarak CityGML ve CityJSON formatlarına dönüştürülmüştür. Bu bağlamda, YBM’den CBS’ye dönüşüm incelenmiş ve CityGML ile CityJSON veri değişim formatları ile elde edilen bulgular değerlendirilmiştir.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135009943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of the Increasing Doses of Vermicompost Applications to Soil on Some Nutrient Concentrations in Olive Tree Leaves (Olea europaea L.)","authors":"Ayşe Nur COŞKUN, Ali SÜMER","doi":"10.28979/jarnas.1324280","DOIUrl":"https://doi.org/10.28979/jarnas.1324280","url":null,"abstract":"This research was conducted on young olive trees (Olea europaea L.) in a private cultivation land located in Bozkoy which resides in Geyikli, Çanakkale, Türkiye, in 2018. The study aimed to investigate the effects of different doses of vermicompost [(control) 0, 2, 4, 6 kg tree-1] on macro and micro nutrient elements of olive trees. Randomized block design was adopted with four doses and 5 replicates. The analyses of the produced vermicompost and field soil were carried out. Vermicompost was applied to the soil in a depth of 15-20cm under the crown projection at once. During the fruit maturation period, leaf samples were collected from annual shoot tip leaves. Macro nutrient element concentrations (nitrogen, phosphorus, potassium, calcium, and magnesium) stayed inside the limit values upon applications of increasing doses of vermicompost, the changes were statistically non-significant. Even though this research was a single-year study, N was in an increasing trend and 2 kg tree-1 was found to be the most effective dose of vermicompost on N values. Among the leaf micro nutrient elements, statistically significant increases were obtained by 2 kg tree-1 on copper, 2 and 6 kg tree-1 on manganese, and 6 kg tree-1 on zinc; while a decrease was observed on iron concentration by 6 kg tree-1. Micro nutrient elements stayed under the limit of toxic effect upon all the applications. The dose 2 kg tree-1 was determined to be the most suitable one upon both macro and micro element concentrations under these trial circumstances.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135209706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Volatile Organic Compounds, Total Phenolic Content, Color, and Heating Uniformity of Lemon Peel as Affected by Rotational Speed of Turntable During Microwave Drying","authors":"Işıl BARUTÇU MAZI, Sevilay SAN","doi":"10.28979/jarnas.1338375","DOIUrl":"https://doi.org/10.28979/jarnas.1338375","url":null,"abstract":"In this study, the effects of rotational speed of microwave turntable (0, 6.5, 9.5, and 12.5 rpm) on surface temperature distribution of lemon peels during drying and, on some quality attributes (color, water activi-ty, total phenolic content (TPC), and volatile organic compounds) of dried lemon peel powders were investigated. The quality analyses were also performed in freeze-dried peels. During microwave drying with rotation, speed of turntable affected the surface temperature values and TPC depending on the power level but did not exert a clear effect on the homogeneity of the surface temperature distribution and the color parameters. The percentage amount of major monoterpene hydrocarbons (limonene, γ-terpinene, myrcene, p-cymene, and α-p-dimethylstyrene) detected in fresh lemon peel decreased after microwave and freeze-drying. At 600W, formation of furan compounds (furfural, furfuryl alcohol, tetrahydrofurfuryl alcohol, 2-acetyl furan, 5-methyl furfural, and HMF) were identified. Microwave drying without rotation (0 rpm) caused uneven heating which led to the production of peel powders with unacceptable dark color especially at 450 and 600W. Drying at 600W-0 rpm gave the darkest color, the highest amount of TPC (1730.7 mg GAE/100g d.b.) and furan compounds. Therefore, microwave drying at low power levels with rotation function preserved the quality of lemon peel powder better.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134972184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CLOUDINESS ANALYSIS WITH BOLTWOOD (BWCS II) CLOUD SENSOR OVER EASTERN ANATOLIA OBSERVATORY (DAG) SITE","authors":"Esragül ATALAY, İlham NASIROĞLU, Cahit YEŞİLYAPRAK","doi":"10.28979/jarnas.1294783","DOIUrl":"https://doi.org/10.28979/jarnas.1294783","url":null,"abstract":"Bu çalışma kapsamında kurulumu devam etmekte olan Doğu Anadolu Gözlemevi’nin (DAG) bulunduğu yerleşkenin bulutluluk özelliklerini ve uzun süreli durumunun belirlenmesi amaçlanmıştır. DAG yerleşkesinde bulunan Boltwood Cloud Sensör II (BWCS II) meteorolojik cihazından alınan ölçümler ile analizler gerçekleştirilmiştir. Yerleşkede bulunan bir diğer meteorolojik cihaz olan Vaisala kullanılarak ölçümlerin doğruluğu kontrol edilmiştir. Vaisala ile yapılan karşılaştırmalar sonucunda BWCS II’nin sıcaklık, nem ve çiy noktası ölçümlerini doğru yaptığı tespit edilmiştir. BWCS II’den alınan verilerden elde edilen analizler sonucunda, yerleşkenin bulutluluk durumunun yıl içerisinde %58,2 oranında açık olduğu bulunmuştur. BWCS II’nin veri sıklığı ve veri kaybı da dikkate alındığında gözlemler için iyi bir sonuç olduğu görülmüştür.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135363456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Position Control Using Trajectory Tracking and State Estimation of a Quad-rotor","authors":"Muharrem MERCİMEK, Onur SARIPINAR","doi":"10.28979/jarnas.1318975","DOIUrl":"https://doi.org/10.28979/jarnas.1318975","url":null,"abstract":"Quad-rotor aircrafts are unmanned aerial vehicles that have gained significant popularity in recent years and have been developed for use in many areas. Such vehicles are capable of vertical take-off and landing and are used in various applications. To operate a quad-rotor aircraft efficiently and safely, fundamental issues such as mathematical modeling, control, and state estimation need to be studied. Mathematical modeling is the creation of a holistic model of the various subsystems of the aircraft including aerodynamic, kinematic, dynamic and control systems. The control system is a mechanism used for the aircraft to perform the desired movements. State estimation techniques are used to obtain and predict information about the state of the aircraft. This study includes position control using a trajectory generation algorithm. Attitude estimation of the quad-rotor is improved with the Explicit Complementary Filter (ECF) and the state estimations is improved with the Extended Kalman Filter (EKF). Different from other studies, the results are obtained by feeding the model with a state estimation filter. The per-formances of the filters used for state estimation are compared.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135489894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of IL-6 and TNF-α Cytokines on Cell Proliferation in Androgen Dependent/Independent Prostate Cancer Cell Lines","authors":"Serhad ONAT, Sümeyye AYDOĞAN TÜRKOĞLU, Feray KÖÇKAR","doi":"10.28979/jarnas.1282119","DOIUrl":"https://doi.org/10.28979/jarnas.1282119","url":null,"abstract":"Prostate cancer is one of the most common types of cancer worldwide. Prostate cancer, caused by abnor-mal and uncontrolled growth of the cells that make up the prostate tissue, is second only to relalated deaths in men. Cytokines, which have a significant impact on the response of the immune system, play an active role in the development of prostate cancer. This study determined the effect of proinflammatory cytokines, IL-6 and TNF-a on the proliferation of prostate cancer cell lines. MTT test was used for the effect of cytokines applied at different doses and hours on cell viability. According to our results, IL-6 cytokine caused a high increase in proliferation in androgen-dependent LNCaP cells, while androgen-independent PC-3 cells showed different proliferative effects in time and dose-dependent manner. TNF-α cytokine had a negative effect on the proliferation of androgen-dependent LNCaP cells, while it increased the proliferation level of androgen-independent PC-3 cells. These results show that the effects of cell lines-on the proliferation of cells are different depending on their androgen sensitivity, which will be used in different cytokinetic studies to determine the inflammatory response to treat prostate cancer. It is espe-cially important to consider this condition during the development of prostate cancer treatment strategies.","PeriodicalId":487451,"journal":{"name":"Journal of Advanced Research in Natural and Applied Sciences","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135875914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}