Lisansüstü Eğitim Enstitüsü Diğer Yayınlar Koleksiyonu

Bu koleksiyon için kalıcı URI

https://hdl.handle.net/20.500.12428/3870

Listeleniyor 1 - 20 / 100

Synthesis and characterization of biodegradable and antioxidant phosphazene-tannic acid nanospheres and their utilization as drug carrier material
(Elsevier Ltd, 2021) Önder, Alper; Özay, Hava
In this study, hexachlorocyclotriphosphazene (HCCP) and tannic acid (TA) were used at different stoichiometric ratios to synthesize cyclomatrix-type polymeric materials with different surface features and dimensions. Using different reactive ratios, the structure and surface functional groups of the synthesized polymeric particles were explained using Fourier-Transform Infrared Spectroscopic (FTIR), Scanning Electron Microscope (SEM), Energy-dispersive X-ray spectroscopy (EDX), X-ray Photoelectron Spectroscopy (XPS) and Thermogravimetric (TG) analysis techniques. With morphologically fully spherical structure and mean 234.82 ± 49.37 nm dimensions, Phz-TA (4:1) nanospheres were researched for in vitro biodegradability, antioxidant features, and usability as a drug release system. In vitro biodegradability of Phz-TA (4:1) nanospheres was investigated at pH = 7.0 and pH = 1.2. Determined to degrade in 8–10 h at these pH values, nanospheres were used for releasing of Rhodamine 6G as a model drug. Due to the rich phenolic structure of the contained tannic acid units, nanospheres were determined to simultaneously have antioxidant features. Thus, this study determined that Phz-TA nanospheres with in vitro biodegradability and antioxidant features are promising polymeric materials for use as a potential drug-carrier in the future.
Effectiveness of fly ash in boron removal from Tuzla (Çanakkale) geothermal fluid
(Yıldız Technical University, 2021) Şahin, Mehmet Oğuzhan; Bektaş, Tijen Ennil; Şanlıyüksel Yücel, Deniz
The heat accumulated in the inner parts of the earth's crust is transmitted to the fluid in the geothermal aquifer by means of transportation. The geothermal fluid is transported to the surface either by wells or naturally. In this study, the geothermal fluid in Tuzla geothermal field in Çanakkale city was examined due to its high boron content (10.3 mg L-1). It was aimed to remove boron from geothermal fluid by adsorption in order to prevent possible negative effects on the environment. Fly ash was obtained from Çan thermal power plant. The specific surface area of the fly ash was 14.6 m2 g-1 and the particle size was between 1.45 and 186 µm. According to ASTM C618 standard, fly ash was classified as Class C. Fly ash was composed of anhydrite, lime, hematite, cristobalite, quartz, calcite and feldspar. Various parameters such as initial pH, adsorbent dosage, contact time, and temperature were studied experimentally for the removal of boron from the geothermal fluid. The suitability of pseudo-first-order, pseudo-second-order, and intraparticle kinetic models to experimental data was examined. The data obtained from the isotherm studies were applied to the Langmuir, Freundlich and Dubinin-Radushkevich models.
Preparation of composite hydrogels containing fly ash as low-cost adsorbent material and its use in dye adsorption
(Springer Science and Business Media Deutschland GmbH, 2022) Önder, Alper; Ilgın, Pınar; Özay, Hava; Özay, Özgür
Abstract: Recycling industrial wastes is necessary for the economy and the environment. Additionally, it is important to develop high-efficiency adsorbents to prevent severe water pollution caused by wastewater containing dye agents. Here, poly(2-acrylamido-2-methylpropane sulfonic acid)-fly ash composite hydrogel was synthesized with a variety of fly ash proportions with the radical polymerization method. The synthesized composite hydrogel was used for adsorption of methylene blue and methyl orange dyes from water containing dye agents. A variety of parameters such as initial dye concentration, solution pH, anion effects, temperature, contact time and adsorbent amount were investigated for optimization of the adsorption process. The poly(2-acrylamido-2-methylpropane sulfonic acid)-fly ash composite hydrogel was determined to be an effective adsorbent to remove both the cationic dye methylene blue (1438.68 mg g−1) and the anionic dye methyl orange (646.54 mg g−1). Experimental adsorption data were assessed with a variety of isotherm and kinetic models. It was determined that the adsorption of both dye molecules abided by the pseudo-second-order kinetic model. The thermodynamic parameters were determined as ΔH° = − 15.77 ± 5.22 kJ mol−1, ΔS = − 45.05 ± 16.42 J mol−1 K−1 and ΔG° < 0 for MB, ΔH° = − 20.13 ± 4.83 kJ mol−1, ΔS = − 72.87 ± 15.20 J mol−1 K−1 and ΔG° > 0 for MO. In conclusion, a material was synthesized that can be used as a single adsorbent composite material for both anionic and cationic dyes. In addition to the perfect adsorption capacity of this material, it offers reusability and a broad area of application for a variety of dye agents.
Animizm
(Motif Halk Oyunları Eğitim ve Öğretim Vakfı, 2021) Chidester, David; Aydoğan, Tuğba
Antropolog E. B. Tylor (1832-1917) tarafından icat edilen “animizm” terimi bir dini veya din türünü değil din teorisini ifade eder. Tylor, dinin asgari tanımını “ruhsal varlıklarainanç” olarak ileri sürerek dinsel inancın cansız nesnelere yaşam, ruh veya güç atfetmeşeklindeki ilkel yanılgıdan kaynaklandığını savunur. Animizm, her ne kadar genellikleakademik din araştırmalarında doğa olaylarının ruh ve gücü olduğunu düşünen yerli halkıninanç sistemlerini tanımlamak için eski bir terim olarak kullanımdan çıkarılmış olsa da yinede popüler kullanımda ve akademik teoride dindeki maddeselliğin anlamı ve değeri hakkındasorunları ortaya çıkarmak için ısrar etmektedir.
Çanakkale bölgesinden alınan midye ve deniz suyu örneklerinin mikrobiyolojik kalitelerinin belirlenmesi
(2021) Tosun, Melike Nur; Taylan Yalçın, Gizem; Zorba, Nükhet Nilüfer
Bu çalışmada Çanakkale bölgesinde belirlenen 9 farklı istasyondan toplanan 536 midye örneğinin ve her istasyondan alınan deniz suyunun mikrobiyolojik kalitesi belirlenmiştir. Midye örneklerinin toplam mezofilik aerobik bakteri yükünün en yüksek Merkez İskele istasyonunda (3.56 log kob/g) olduğu belirlenmiştir. En yüksek E. coli varlığı ise Gelibolu istasyonunda (1.99 log kob/g) saptanmıştır. Midyelerin mikrobiyel yüklerinin toplandıkları istasyonlar arasında istatistiksel anlamda farklı olmadığı (P>0.05) görülmüştür. Midyelerin toplam mezofilik aerobik bakteri sayısı ile toplandıkları deniz suyunun toplam mezofilik aerobik bakteri sayısı arasında pozitif yönde korelasyon tespit edilmiştir (P<0.05). Gelibolu ve Lapseki istasyonlarındaki mikrobiyel yükün diğer istasyonlara göre daha yüksek olduğu saptanmıştır. Genel olarak değerlendirildiğinde Gelibolu ve Lapseki bölgesi haricinde Çanakkale boğazının farklı noktalarından alınan midyelerin mikrobiyel kalitesinin yasal sınırlar içerisinde olduğu belirlenmiştir.
Comparative analysis of SPI, SPEI, and RDI ındices for assessing spatio-temporal variation of drought in Turkiye ( Jul, 10.1007/s12145-024-01401-8, 2024)
(Springer Heidelberg, 2024) Yaman Öz, Fatma; Özelkan, Emre; Tatlı, Hasan
Assessment of multidimensional drought vulnerability using exposure, sensitivity, and adaptive capacity components
(Springer, 2023) Serkendiz, Hıdır; Tatlı, Hasan
This study provides a method for analyzing the drought-vulnerability index (DVI) from a multidimensional perspective that includes biophysical and social aspects, considering the Intergovernmental Panel on Climate Change's (IPCC) assessment. The proposed method generates the exposure index (EI), sensitivity index (SI), and adaptive capacity index (ACI) components of the proposed DVI using nine sub-indicators and 29 proxy variables. By using it throughout all of Turkey's provinces, the performance of the developed index was evaluated. In this study, the decision matrices were built utilizing expert knowledge, and the weights of the indicators and variables were obtained by using the Analytical Hierarchy Process (AHP) technique. Moreover, the values of these four indices were classified as very high, high, moderate, low, and very low, and their geographical distribution across the country was drawn, as well as relevant patterns retrieved. The study's major results show that 17 of the 81 provinces are classified as very high, 16 as high, 15 as moderate, 17 as low, and the remaining 16 as very low drought vulnerable. Another significant result is that the majority of people in the country's south, center, and southeast rely on agriculture and are thus more vulnerable to drought due to socioeconomic underdevelopment in those regions.
Multidimensional assessment of agricultural drought vulnerability based on socioeconomic and biophysical indicators
(Elsevier, 2023) Serkendiz, Hıdır; Tatlı, Hasan; Özcan, Hasan; Çetin, Mahmut; Sungur, Ali
Agricultural drought threatens Turkiye's food security and economy, revealing a lack of multidimensional provincial vulnerability studies. Therefore, the primary objective of this study is to evaluate Turkiye's vulnerability to drought utilizing a multidimensional strategy incorporating biophysical and socio-economic indicators. In this context, an initial step involved the development of a conceptual framework for drought vulnerability, drawing upon the Intergovernmental Panel on Climate Change recommended elements of exposure, sensitivity, and adaptive capacity. Subsequently, this conceptual framework was applied at the provincial level, encompassing parameters such as temperature, precipitation, soil characteristics, water resources, agricultural earnings, demographic traits, educational levels, innovation, insurance coverage, and road density. The Aridity Index was used as an indicator for drought exposure, representing the physical dimension of drought. Under the sensitivity component, a total of 14 variables were defined under the indicators of soil, water and land resources, economy, and population, while under the adaptive capacity component, a total of five variables were identified. The weights of these indicators and variables were determined based on expert opinions using the Analytic Hierarchy Process method. As a result, five different indices were obtained by combining the indicators: Exposure Index, Sensitivity Index, Adaptation Capacity Index, Potential Drought Impact Index, and Agricultural Drought Vulnerability Index. In addition, spatial distribution models of these indices were also generated. Research results showed that the climatic regions most exposed to drought are also the most vulnerable. The Central, Southeastern, and Eastern Anatolian regions constitute the regions where the most vulnerable provinces are concentrated spatially.
Comparative analysis of SPI, SPEI, and RDI ındices for assessing spatio-temporal variation of drought in Türkiye
(Springer Heidelberg, 2024) Yaman Öz, Fatma; Özelkan, Emre; Tatlı, Hasan
This research presents a comprehensive drought analysis using climate data obtained from 219 homogeneously distributed meteorological stations in T & uuml;rkiye between 1991 and 2022. In this context, Standard Precipitation Index (SPI), Standardized Precipitation Evapotranspiration Index (SPEI) and Reconnaissance Drought Index (RDI) drought indices were used and comparative analysis was made. T & uuml;rkiye. The study demonstrates that below-normal precipitation over extended periods and increasing temperatures have contributed to the increased frequency of meteorological drought events. T & uuml;rkiye's topographic conditions, particularly its location in the Mediterranean basin, significantly influence drought occurrences. It is noted that over the past 20 years, T & uuml;rkiye has been trending towards drier conditions, with rising temperatures reinforcing this trend. The study observes that the moderate drought class range is the most frequently recurring in the SPI, SPEI, and RDI methods utilized. Regarding atmospheric conditions affecting the climate in T & uuml;rkiye, it is observed that increased drought severity stands out prominently in years when the North Atlantic Oscillation is positive. During these years, increased drought severity is evident in the SPI, SPEI, and RDI indices, particularly in winter and autumn, while a wide area experiences drought effects in the summer months. Long-term analyses emphasize that drought periods occur less frequently but have more prolonged impacts, attributed to variations in precipitation patterns from year to year and the influence of rising temperatures due to global climate change. The potential future increase in drought in the Mediterranean basin due to global climate change and T & uuml;rkiye's vulnerability to this situation could have adverse effects on water resources, food security, energy sources, and ecosystems.
Does magnetized strange quark matter exist in the early universe?
(World Scientific Publ Co Pte Ltd, 2022) Kalkan, Sinem; Aktaş, Can; Aygün, Sezgin
In this paper, we have examined the magnetized strange quark matter (MSQM) distribution in the inhomogeneous anisotropic Einstein-Rosen universe model within the framework of f(R,T) theory and General Relativity (GR) in order to investigate whether there was a magnetic field in the first moments of the universe. With the help of the arbitrary F(r) function, we researched for solutions in both theories for various cases. We have seen that the cubic function F(r) = r(3) gives meaningful results in both theories. We have obtained magnetic field-free strange quark matter solutions for the quadratic and constant states of the arbitrary function F(r). It is seen that the choice of geometry (selection of the F(r) function) has an effect on the presence of the magnetic field. Finally, the physical results are examined on 3D graph.
Behavior of Magnetized Strange Quark Matter in 5D Cosmological Model
(Springer Int Publ Ag, 2022) Kalkan, Sinem; Aktaş, Can
In this study, distribution of magnetized strange quark matter is investigated for Kaluza-Klein universe within the framework of f(R, T) theory. Hubble parameter is used in the solution of f(R, T) field equations. The results obtained have been harmonized with the current values of the deceleration parameter and the evolution of the cosmic universe has been examined with the help of graphics and tables. When t -> infinity, we have obtained the value of the cosmological term very small. Also, we have examined the energy conditions for magnetized strange quark matter distribution.
Magnetized Strange Quark Models in Lyra Theory
(2023) Özcan, Kadir; Aktaş, Can
In this study, the behavior of magnetized strange quark matter (MSQM) distribution in Lyra theory was investigated for homogeneous anisotropic Bianchi III, locally rotationally symmetric (LRS) Bianchi I, and Kantowski-Sachs universe models. We have used the equations of state, anisotropy, and linearly varying deceleration parameters to obtain the exact solutions of field equations in Lyra theory. When switching from the anisotropic universe model to the isotropic universe model, the magnetic field was not observed in the LRS Bianchi I universe. Besides, the graphs of the dynamic quantities obtained for each universe model were analyzed in detail. Finally, we inquire whether further research should be conducted.
Bianchi V I0 Universe with Magnetized Strange Quark Matter in f(R, T) Theory
(2021) Kalkan, Sinem; Aktaş, Can
This study discusses f(R, T) theory, one of the alternative theories. It\rthen studies magnetized strange quark matter in the universe model Bianchi V I0,\rhomogeneous and anisotropic. Afterwards, it has determined whether the energy\rconditions are provided by using the deceleration parameter while obtaining the solutions.\rMoreover, the evolution of the cosmic universe is examined with the help of\rgraphics and tables.
Aile Sağlığı Merkezlerinde Çalışan Sağlık Profesyonellerinin Yaşlı İstismarı ile Karşılama Durumları ve İlişkili Faktörler: Kesitsel Bir Çalışma
(Türkiye Klinikleri Yayınevi, 2022) Yalçın Gürsoy, Melike; Tanrıverdi, Gülbu; Yılmaz, Hediye Elif
Amaç: Bu çalışma, aile sağlığı merkezlerinde çalışan sağlık profesyonellerinin yaşlı istismarı ile karşılaşma durumlarını ve ilişkili faktörleri belirlenmek amacıyla yapılmıştır. Gereç ve Yöntemler: Kesitsel türde olan araştırma, Çanakkale ilinde yer alan aile sağlığı merkezlerinde çalışan 122 sağlık profesyoneli ile gerçekleştirilmiştir. Veriler, literatür doğrultusunda oluşturulan anket formu aracılığıyla Kasım 2020-Kasım 2021 tarihleri arasında, çevrim içi ve yüz yüze görüşme yöntemleriyle toplanmıştır. Verilerin değerlendirilmesinde tanımlayıcı istatistiksel yöntemler ve ki-kare analizi kullanılmıştır. Bulgular: Sağlık profesyonellerinin %23’ünün (n=28) yaşlı istismarı olgusuyla karşılaştığı, en sık istismarla karşılaşan meslek grubunun aile hekimleri olduğu (%53,6; n=15), karşılaşılan istismar vakalarının yalnızca %15,2’sinin (n=5) kolluk kuvvetlere bildirildiği belirlenmiştir. Ayrıca çalışmaya katılanların %25,4’ünün (n=31) yaşlı istismarı vakasından şüphelendiği, %36,4’ünün (n=16) yaşlının bakımsız olması nedeniyle şüphelendiği, %9,5’inin (n=4) kolluk kuvvetlere bildirimde bulunduğu saptanmıştır. Yaşlı istismarı ile karşılaşma durumu ile yaş, mesleki deneyim, meslek ve yaşlının istismar yönünden değerlendirilmesi gerektiğini düşünme arasında istatistiksel olarak anlamlı bir ilişki olduğu belirlenmiştir (p<0,05). Sonuç: Bu çalışmanın sonuçlarında yaklaşık her dört sağlık çalışanından birinin yaşlı istismarı olgusuyla karşılaştığı, ancak bunların çok azının bildiriminin yapıldığı görülmüştür. Bu nedenle 1. basamakta çalışan sağlık profesyonellerine yönelik yaşlı istismarı konusu ile ilgili hizmet içi eğitimler düzenlenmesi, yaşlıların aile sağlığı merkezlerinde veya evlerinde belirli aralıklarla istismar yönünden değerlendirilmesi, sağlık profesyonellerine eğitim müdahalesinin etkisini gösteren araştırmalar yapılması önerilebilir.
Cinsiyetlendirilmiş Yiyecek Adlarına İlişkin Bakış Açısının Değerlendirilmesi
(2021) Özkök, Ferah; Korkmaz, Müesser; Tarhan, Nebahat
Yiyecekler sosyal yaşamla güçlü bir şekilde ilişkilidir. Yiyeceklerin cinsiyetlendirilmiş\rsöylemleri ise bir toplumda cinsiyetlere biçilen rollerin sosyal kabulünü artırmak için\rkullanılabilir ya da erkeklerin ve kadınların gıda tüketim kalıplarının çerçevelenmesinde\retkili olabilir. Bu doğrultuda çalışmanın amacı kadınlık ve erkeklik göstergeleri üzerinden\risimlendirilmiş bazı yiyecek adlarının toplumda yarattığı bakış açısının belirlenmesidir.\rÇalışmanın verileri çevrimiçi ortamda yüz yüze görüşme ve form doldurma tekniği ile elde\redilmiştir. Çalışmada 40’ı kadın ve 35’i erkek olmak üzere toplamda 75 katılımcıya\rulaşılmıştır. Çalışmada ulaşılan verilerin analizinde “Tema Analizi ve Betimsel Analiz”\rkullanılmıştır. Çalışma sonucunda cinsiyetlere özgü anlamları olan bazı isimlerin\ryiyeceklerin adlandırılmasında kullanılmasının insanlarda bazı çağrışımlara sebep olduğu\rbelirlenmiştir Bu çağrışımlar insanların olumlu veya olumsuz duygu ve düşüncelerini\retkilemekle birlikte bu durum tüketime de yansımaktadır. Toplumsal cinsiyete, Türk\rkültürüne has yiyecek adları çerçevesinde bakıldığında, katılımcıların çoğunun özellikle\rkadınlara vurgu yaparak, belirlenen yiyecek adlarında cinsiyetçilik kategorisini ön plana\rçıkardıkları görülmüştür. Bu adlandırmaların toplumda, cinsiyet ayrımcılığı şeklinde bir\ralgı oluşturduğu söylenebilir. Çalışmada ulaşılan sonuçlar kapsamında yemeğin fizyolojik\rihtiyacın ötesinde sembolik bir anlama sahip olduğu ifade edilebilir.
Cocoa and cocoa bean shells role in human health: An updated review
(Academic Press Inc., 2021) Çınar, Zeynep Özlem; Atanassova, Maria; Boyuneğmez Tümer, Tuğba; Caruso, Gianluca; Antika, Gizem
Cocoa is derived from the seeds of Theobroma cacao L., an evergreen tree typical of tropical regions. It contains numerous phytochemicals, with polyphenols representing the largest groups of compounds inside the seed, and has been implicated in numerous biological properties, such as antioxidant, antiproliferative, antiapoptotic, anti-inflammatory, anti-cancer. Moreover, cocoa has been investigated in different health conditions, including heart diseases, dyspepsia, nervous system diseases, circulation problems, and many others. Given its high consumption in many countries all over the world, it is important to know and understand its effects on human health. In addition, the cocoa bean shell, a by-product of the process of cocoa preparation, has been gaining remarkable interest due to its high content of phytochemicals. This review summarizes the available literature and works on the health benefits of cocoa and cocoa bean shells. Moreover, the current review focuses on studies investigating their possible therapeutic roles in cancer and the underlining potential mechanisms of action.
New nimesulide derivatives with amide/sulfonamide moieties: Selective COX-2 inhibition and antitumor effects
(Elsevier Masson s.r.l., 2021) Güngör, Tuğba; Özleyen, Adem; Yılmaz, Yakup Berkay; Siyah, Pınar; Ay, Mehmet; Boyuneğmez Tümer, Tuğba
Seventeen new amide/sulfonamide containing nimesulide derivatives were synthesized and characterized by several spectroscopic techniques and primarily investigated for their inhibitory potential on COX enzymes and other pro-inflammatory factors. Experimental analyses showed that among seventeen compounds, N8 and N10 have remarkable potency and selectivity for the COX-2 enzyme over COX-1 at very low doses as compared to nimesulide. Moreover, both N8 and N10 selectively reduced the Lipopolysaccharide (LPS)-stimulated COX-2 mRNA expression level while the COX-1 level remained stable. Both PGE2 release and nitric oxide production in macrophage cells were significantly suppressed by the N8 and N10 treatment groups. In silico ADME/Tox, molecular docking and molecular dynamics (MD) simulations were also conducted. Additionally, all compounds were also screened in a panel of cancer cell lines for their antiproliferative properties by MTT and SRB assays. Compound N17 exhibited a considerable antiproliferative effect on the colon (IC50: 9.24 μM) and breast (IC50: 11.35 μM) cancer cell lines. N17 exposure for 48 h decreased expression of anti-apoptotic protein BCL-2 and increased the expression of apoptogenic BAX. Besides, the BAX/BCL-2 ratio was increased with visible ultrastructural changes and apoptotic bodies under scanning electron microscopy. In order to investigate the structural and dynamical properties of selected hits on the target structures, multiscale molecular modeling studies are also conducted. Our combined in silico and in vitro results suggest that N8 and N10 could be further developed as potential nonsteroidal anti-inflammatory drugs (NSAIDs), while cytotoxic N17 might be studied as a potential lead compound that could be developed as an anticancer agent.
Dataset on the differentiation of THP-1 monocytes to LPS inducible adherent macrophages and their capacity for NO/iNOS signaling
(Elsevier Inc., 2021) Özleyen, Adem; Yılmaz, Yakup Berkay; Boyuneğmez Tümer, Tuğba
When THP-1 cells are differentiated into adherent macro-phage-like cells, they respond to inflammatory stimuli by changing their phenotypes to an activation state and altering the expression of inflammation-related genes. Nitric oxide (NO) is a diatomic molecule implicating in various pathological conditions including tissue damage, ER stress, obesity, and cancer. The sustained inflammatory microenvironment leads to increased NO release through the activation of the inducible nitric oxide synthase (iNOS) gene in macrophages. Here, we provide a dataset on the optimized conditions for the THP-1 differentiation and the induction of NO/iNOS signaling under inflammatory stimulus. The human monocytic cells were differentiated into adherent macrophage-like phenotype by phorbol-12-myristate-13-acetate (PMA) stimulation under optimized conditions. In this study, NO/iNOS signaling capacity and the regulation of other pro-inflammatory genes including TNF-α, IL-1β, and COX-2 in the LPS-induced THP-1 were examined.
A novel approach for in vitro fungicide screening and the sensitivity of Monilinia populations from peach orchards in Turkey to respiratory inhibitor fungicides
(Elsevier Ltd, 2021) Durak, Muhammed R.; Arslan, Kübra; Sılan, Ece; Yıldız, Gözde; Özkılınç, Hilal
Brown rot caused by Monilinia fructicola and M. laxa can result in considerable losses in peach production worldwide. Respiratory Inhibitors (RIs) have been used to control the disease in Turkey and worldwide. However, resistance against RIs may have been developing in Monilinia populations in Turkey. The sensitivity level of the total of 128 isolates of Monilinia fructicola and M. laxa from peach fruits in Turkey were tested against certain RIs: azoxystrobin, boscalid, and commercially used signum (26,7% boscalid, 6,7% pyraclostrobin). Fungal growth from both mycelia and conidia was evaluated as fungicide response phenotypes. A new approach was developed to define the sensitivity levels of the isolates. The mean IC50 values of each fungicide on representative collection from each species were used as discriminatory doses in view of both phenotypes. The whole collection was scanned at discriminatory doses and the relative growth (RG) of each isolate was obtained. The distribution of RG data sets in the quantile ranges was considered to define sensitivity levels of the isolates against each fungicide. Resistance levels for mycelial and conidial growth assays varied within and between the species against the three RIs. According to the pairwise correlation analyses between responses of the species to the fungicides, the significant correlation indicating a cross-resistance was only found between boscalid and signum on conidial growth assays for M. fructicola. This study represents in vitro fungicide responses of a large population of Monilinia pathogens from peach in Turkey for the first time which will help to reconsider disease control strategies and suggests a fungicide sensitivity definition be used in all in vitro fungicide assays as a common and comparable strategy at the global stage.
Highly efficient removal of methyl orange from aqueous media by amine functional cyclotriphosphazene submicrospheres as reusable column packing material
(Elsevier B.V., 2021) Önder, Alper; Özay, Hava
Polyphosphazenes have an important place in material science because they allow functional diversity to be realized easily. In this study, for the first time, synthesis of cyclomatrix-type poly-(cyclotriphosphazene-co-4-(aminomethyl)-1,8-octanediamine) (Phz-AO) particles including different surface features and dimensions have been reported using different stoichiometric ratios of hexachlorocyclotriphosphazene and 4-(aminomethyl)-1,8-octanediamine. The use of Phz-AO (1:2) submicroparticles with spherical form and average dimension of 647.82 ± 22.23 nm as an adsorbent was researched for methyl orange (MO) anionic azo dye. Submicrospheres had significant potential for adsorption of negative charged MO and maximum adsorption capacity of 1244.7 mg.g − 1. The submicrospheres displayed high adsorption potential at pH ≤6 conditions thanks to their surface amine groups. The maximum adsorption capacity in synthetic textile wastewater was 912.75 mg.g−1 as experimental. While the adsorption kinetics had the pseudo second order model, the most suitable model for adsorption was the Langmuir isotherm. The thermodynamic parameters for MO adsorption with submicrospheres were 10.02 ± 1.81 kj.mol−1 for ΔH°, 61.08 ± 5.74 j.mol−1.K−1 for ΔS° and ΔG° (kj.mol−1)<0. In light of all data obtained, the Phz-AO (1:2) submicrospheres which can be easily prepared with a single-step reaction are expected to be a remarkable member of the super adsorbent material family.

Güncel Gönderiler