Niğde Ömer Halisdemir University Institutional Repository
Not a member yet
14438 research outputs found
Sort by
Leaf blight caused by Didymella glomerata on blackberry in Turkey
Get PDFThe cultivation of blackberries has recently increased in Turkey, despite the fact that wild blackberry types have grown almost everywhere in the country. During the summer of 2011, leaf blight symptoms were observed in a blackberry vineyard in Karlisu, as well as on wild blackberry plants in Altinozu, Hatay province, Turkey. Based on morphology, fungal isolates obtained from these blighted leaf margins shared similar morphological characteristics and were tentatively identified as Didymella glomerata. To confirm the morphologic identification, the nucleotide sequences of a representative isolate's ITS, LSU, and tub2 regions of DNA were used. The sequences of three regions were 99-100% identical to D. glomerata isolate sequences in GenBank. Healthy blackberry suckers of the thornless blackberry cultivars 'Triple Crown' and 'Chester' grown in pots were inoculated with spore suspension on foliar parts under greenhouse conditions for pathogenicity testing. D. glomerata was extremely virulent, causing severe leaf blight in both blackberry cultivars. D. glomerata was constantly isolated from inoculated plants' leaf lesions. This is the first report of D. glomerata infection of blackberry, a novel host for this pathogen in Turkey and around the world. More research into the biology and management of the disease is required.Mardin Artuklu University [MAU.BAP.18]This work was partially supported by the Mardin Artuklu University Grant Number [MAU.BAP.18.KMYO.044]
NAZIM BİÇİMİ AÇISINDAN HACI TAŞAN’IN ESERLERİNİN İNCELENMESİ
Get PDFYöresel Türk müziğinin önemli kaynak kişilerinden Hacı Taşan’ın icra ettiği 13 adet eserin edebî açıdan incelenmesinin amaçlandığı bu çalışmada eserler, sözlerin yapısı ve nazım biçimi ekseninde incelenmiştir. İncelenen eserlerin büyük çoğunluğunda 11’li hece ölçüsünün kullanıldığı, 2 eserde 7’li ve bir eserin bazı dizelerinde ise 8’li hece ölçüsüne yer verildiği tespit edilmiştir. İncelenen 13 adet eserin 8 tanesinin “türkü”, 3 tanesinin “koşma” ve 2 tanesinin “mâni” nazım biçiminde olduğu tespit edilmiştir. Eserlerin tamamında aşk, ayrılık, kavuşma, ölüm olmak üzere birbiriyle de ilişki içerisindeki dört konu işlenmiştir. Hacı Taşan’ın incelenen eserlerinde kullandığı bazı sözcüklerin yapılan diğer çalışmalarda farklı yazıldığı tespit edilmiştir. Eserlerin hangi yöreye ait olduğunun şüpheli olduğu durumlar için kaynak kişi icrasındaki söz unsurlarının incelenmesinin çözüm üretebileceği sonucuna ulaşılmıştır. Bu çalışmada incelenen eserlerin sözcüklerindeki farklılıklar ve eser isimlerinin metinle uyumsuz olması gibi bulgulara ulaşıldığı için derleme çalışmaları ile kayıt altına alınan yöresel Türk müziği eserlerinin söz unsurlarının yeniden ele alınması önerilmektedir
Synthesis and characterization of a new eco-friendly dopamine derivative schiff base as an effective corrosion inhibitor for mild steel in acidic environment
Get PDFThe natural corrosion inhibitor behaviour of a newly synthesized dopamine derivative Schiff base (4-DBAB) has been inspected on mild steel in aggressive 1 M HCl using linear polarization, electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The Schiff base was synthesized by eco-friendly pathway. Characterization of the synthesized new non-toxic inhibitor was performed using FT-IR and 1H-NMR spectroscopy techniques. The anti-corrosive efficiencies at optimum concentration of 4-DBAB inhibitor was 87.4% after 1 h and 98.4% after 120 h by impedance technique in acidic solution. The potential of zero charge of mild steel was also determined to elucidate the inhibition mechanism in the presence of the highest 4-DBAB solution. The atomic force microscopy and field emission scanning electron microscopy researches performed on surface morphology to provide additional support on the interaction between the mild steel surface and 4-DBAB molecules. Adsorption behaviour of the inhibitor was also studied at different durations by experimental inhibition results and showed the Langmuir isotherm involving chemisorption.HighlightsA new dopamine-derived Schiff base (4-DBAB) with natural and environmentally friendly corrosion inhibition properties was synthesized. (Synthesis of eco-friendly compound).4-DBAB demonstrated a high anti-corrosive efficiency after 120 hours in aggressive 1M HCl, as determined by impedance technique. (Exceptional corrosion inhibition).The determination of the potential of zero charge of mild steel provided insights into the inhibition mechanism in the presence of the highest 4-DBAB solution. (Mechanism elucidation).AFM and FE-SEM studies on surface morphology supported the interaction between the mild steel and 4-DBAB molecules, affirming its corrosion inhibition properties. (Surface interaction analysis)
Characterization of the effects of acetic acid on the recovery of valuable contents from flotation tailings of non-sulfide metals
Get PDFNon-sulfide lead flotation tailings draw attention in terms of their valuable contents. Dissolution studies have been carried out with strong inorganic acids, especially in ore form, but these acids have been unfavorable in removal in the context of metal recovery processes. Organic acids, on the other hand, are notable for their environmentally friendly properties and selective metal recovery opportunities. In this study, the effects of acetic acid on metal recovery from oxidized waste were investigated with different experimental parameters at a laboratory scale. Optimal conditions were determined depending on the increase in acetic acid concentration. At 0.75-1.0 M acid concentrations, 49-55% Pb and 49-54% Zn recovery efficiencies were obtained with grades of 7.0-7.2% and 19.5-19.7%, respectively. The recovery of Pb/Zn by the leaching process with acetic acid and the selective nonrecovery of iron were also observed through characterization studies. With the Rietveld XRD method, an increase in iron minerals such as goethite and a decrease in smithsonite-hydrozincite minerals were determined. These changes were seen as a decrease in the contents of these minerals in SEM/EDX analysis and as a decrease in smithsonite mineral bond structures in the FT-IR analysis. This study showed that acetic acid has many advantages in the utilization of zinc-lead-containing oxide flotation tailings, which have high economic value, such as selective metal recovery, easy biodegradability, environmental friendliness, and non-corrosiveness.Havadan MiningThe author wishes to thank Havadan Mining for their support
Multiple resistance to EPSPS and ALS inhibitors in Palmer amaranth (Amaranthus palmeri) identified in Turkey
Get PDFAmaranthus palmeri was first reported in Turkey in 2016, and an immediate heavy infestation of the weed was found in fruit orchards and summer crops such as maize, cotton, and sunflower. There have been farmers' complaints about the ineffective control of Palmer amaranth through the use of glyphosate and some sulfonylureas herbicides. Hence, this study aimed to determine the possible herbicide resistance evolution in Palmer amaranth against glyphosate and acetolactate synthase (ALS) herbicides. Seeds of 21 Palmer amaranth populations were collected from five provinces of Turkey where control problems with glyphosate and ALS inhibitors were reported in maize fields. Seeds of certain biotypes categorized as resistant or susceptible were grown to obtain the F-2 generation. A single-dose experiment determined the possible resistance to ALS inhibitors and glyphosate among the 21 populations. Of this, 18 populations were included in the subsequent dose-response experiments due to evident survival. Based on ED50 values from the dose-response experiment, SNU-04 and ADN-21 biotypes had the highest resistance index for glyphosate which was more than 7. The biotypes ADN-21, OSM-15, and DIR-09 recorded the highest ED50 value with a resistance index of 9.21-10.35 after nicosulfuron application. Whereas, the biotypes SNU-04, OSM-15, and ADN-21 were with the highest ED50 value and resistance index of 6.41-7.44, after the application of foramsulfuron + iodosulfuron methyl-sodium. The increase in genomic 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) copy number has been observed in suspected cases that have been accepted as the molecular basis for the development of resistance against glyphosate. The sequence alignment results for the ALS gene contained Ala122Val and Pro197Arg mutations related to target-site resistance against ALS herbicides.Turkiye Bilimsel ve Teknolojik Arastirma Kurumu [TOVAG 1230021]Turkiye Bilimsel ve Teknolojik Arastirma Kurumu, Grant/Award Number: TOVAG 123002
Determination of in vitro antimicrobial and antibiofilm activity of Hypericum crenulatum against some food pathogens and its phenolic content
Get PDFThe study investigates the antimicrobial effects of the Hypericum crenulatum ethanolic (HCE) extract against 14 different food pathogens and their biofilm-forming abilities in response to HCE treatment. The phenolic acid composition of the HCE extract was also determined using an HPLC-DAD detector. The antimicrobial activity of HCE extract was assessed using the disc diffusion and microdilution methods. According to the findings, the methicillin-resistant Staphylococcus aureus ATCC 43300, Listeria monocytogenes RSKK 472, and Listeria innocua ATCC 33090 strains exhibited the lowest minimum inhibitory concentration (MIC) values at a concentration of 2 mu g mL(-1). Based on the disc diffusion test results, the largest zone of inhibition of HCE extract against foodborne pathogens was seen against Bacillus cereus, and the diameter of the inhibition zone increased with the concentration of HCE extract ( P < 0.05). In terms phenolic acid composition of HCE extract, the phenolic acids with the highest and lowest amounts were caffeic acid (59.92 mg g(- 1)) and p-coumaric acid (13.61 mu g g(- 1)), respectively. Our study determined that HCE extract demonstrated antimicrobial, bactericidal, and antibio fi lm activities against some foodborne pathogens. These effects reveal its potential for improving food safety by inhibiting the growth of these pathogens
The effects of COVID-19 on the economy in the framework of institutional economy
Get PDFSosyal Bilimler Enstitüsü, İktisat Ana Bilim DalıCovid-19 virüsü, kısa bir süre içerisinde hızlı bir şekilde bütün dünyayı sarsmıştır. İlk Covid-19 vakası 2018 yılının aralık ayında Çin ülkesinin Wuhan kentinde görülmüş, buradan kısa bir süre içerisinde ABD, Güney Kore, Japonya, Tayland ve bütün dünyaya yayılmıştır. DSÖ, 11 Mart 2020'de Covid-19 hastalığını küresel bir salgın olarak açıklamıştır. Bu araştırmada kurumsal iktisat kapsamında Covid-19 virüsünün ekonomiye etkilerini incelemek amaçlanmıştır. Bu amaç doğrultusunda gerçekleştirilen literatür taraması sonucunda konu ile ilişkili daha öncesinde yapılmış olan çalışma ve araştırmalara göz atılmıştır. Yapılan incelemeler sonucunda konu ile alakalı olan bilgilere araştırma içerisinde yer verilmiştir. Gerçekleştirilen bu araştırma, kurumsal iktisat kapsamında Covid-19 virüsünün ekonomiye pozitif ve negatif yönlü etkilerini tespit edilmesi ve gelecekte yapılacak olan çalışma ve araştırmalar örnek teşkil etmesi açısından fazlasıyla önem arz etmektedir. Araştırma sonucunda, Covid-19 salgınının ekonomiler üzerinde genel bir durgunluk yarattığı görülmüştür. Bahsedilen durgunluk küresel emtia fiyatlarının artmasına, dış ticaret oranlarının düşmesine, işsizlik oranlarının artış göstermesine ve üretim kayıplarına neden olmuştur.The Covid-19 virus has shaken the whole world quickly in a short period of time. The first Covid-19 case was seen in Wuhan, China in December 2018, from where it spread to the USA, South Korea, Japan, Thailand and the whole world in a short period of time. On March 11, 2020, the WHO declared the Covid-19 disease a global epidemic. In this research, it is aimed to examine the effects of Covid-19 virus on the economy within the scope of corporate economics. As a result of the literature search conducted for this purpose, previous studies and researches related to the subject were reviewed. As a result of the examinations, the relevant information has been included in the research. This research carried out is of great importance in terms of determining the positive and negative effects of the Covid-19 virus on the economy within the scope of corporate economics and setting an example for future studies and research. As a result of the research, it has been observed that the Covid-19 pandemic has caused a general recession on economies. The mentioned recession caused global commodity prices to increase, foreign trade rates to decrease, unemployment rates to increase and production losses
Evaluation of mandibular trabecular bone by fractal analysis in pediatric patients with hypodontia of the mandibular second premolar tooth
Get PDFBackground It is still unclear whether the trabecular structure of the jaw is different in individuals with hypodontia than in those without hypodontia; this is important for clinicians. The aim was to determine whether the mandibular trabecular bone structure of children and adolescents with hypodontia differs from the control group by using the fractal analysis (FA) method in this study. Methods A total of 138 panoramic radiographs of 69 cases and 69 control subjects (mean age 13.2 +/- 10.1) were evaluated. The age and gender of subjects in the case and control groups were matched. Three regions of interest (ROIs) were selected from the panoramic radiographs. ROI1 refers to the center of the ramus rising above the mandibular foramen. ROI2 refers to the area between the apical level of the mandibular molar and the upper border of the mandibular canal. ROI3, the missing tooth region, refers to the apical third of the mesial side of the erupting or fully erupted permanent mandibular first molar. Mann-Whitney U and Wilcoxon tests were used. p 0.05). The FD values of the case group were lower than the control group for ROI3 (p < 0.05). Conclusion The results of this study showed that the mandibular trabecular bone quality of pediatric patients with one missing tooth was different from the healthy group. The difference in the mean FD values from the ROIs indicates that the ramus has a denser structure than the mandibular corpus. Clinicians should factor this into their dental treatment planning process
Investigation of social studies teachers' views on critical pedagogy in terms of some variables
Get PDFEğitim Bilimleri Enstitüsü, Türkçe ve Sosyal Bilimler Eğitimi Ana Bilim Dalı, Sosyal Bilgiler Eğitimi Bilim DalıBu araştırmanın amacı Sosyal Bilgiler öğretmenlerinin eleştirel pedagoji hakkındaki görüşlerinin farklı değişkenler de göz önünde bulundurularak tespitini yapmaktır. Araştırma karma araştırma yöntemlerinden açıklayıcı sıralı desen ile yapılandırılmıştır. Araştırmanın örneklemini 2023-2024 Eğitim-Öğretim yılının güz döneminde Hatay ilindeki devlet ve özel ortaokullarda görev yapan, 56'sı Sosyal Bilgiler 114'ü diğer branşlar olmak üzere toplam 170 öğretmenden oluşmaktadır. Araştırmada kullanılan veri toplama araçları Yılmaz (2009) tarafından geliştirilen "Eleştirel Pedagoji İlkeleri Ölçeği" ile araştırmacı tarafından geliştirilen yarı yapılandırılmış görüşme formudur. Nicel veriler, SPSS 26 (Sosyal Bilimler için İstatistik Paketi) ile analiz edilmiştir. Nitel verileri anlamak ve yorumlamak için ise içerik analizi kullanılmıştır. Araştırmadan elde edilen bulgulara bakıldığında Sosyal Bilgiler öğretmenlerinin eleştirel pedagoji ilkelerini orta düzeyde desteklediği görülmektedir. Bununla birlikte Sosyal Bilgiler öğretmenlerinin eleştirel pedagoji hakkındaki görüşlerinin cinsiyetlerine, hizmet yılına, çalıştıkları kurum türüne ve diğer branşlara göre anlamlı bir farklılık göstermediği tespit edilmiştir. Araştırma sonucunda Sosyal Bilgiler öğretmenlerinin eleştirel pedagoji hakkındaki farkındalıklarının artırılmasına yönelik faaliyetlerin gerçekleştirilmesine yönelik öneriler vardır.The aim of this research is to determine the opinions of Social Studies teachers about critical pedagogy, and also taking into account different variables. The research was structured with an explanatory sequential design, one of the mixed research methods. The sample of the research consists of a total of 170 teachers, 56 of whom are Social Studies and 114 of whom are from other branches, working in public and private secondary schools in Hatay province in the fall semester of the 2023-2024 academic year. The data collection tools used in the research are the "Critical Pedagogy Principles Scale" developed by Yılmaz (2009) and the semi-structured interview form developed by the researcher. Quantitative data were analyzed with SPSS 26 (Statistical Package for Social Sciences). Content analysis was used to understand and interpret qualitative data. Considering the findings of the research, it is seen that opinion about critical pedagogy of Social Studies teachers at a moderate level. And also it has been determined that Social Studies teachers' views on critical pedagogy do not differ significantly according to their gender, years of service, type of institution they work in and other branches. As a result of the research, there are suggestions for carrying out activities to increase the awareness of Social Studies teachers about critical pedagogy
Comparative Investigation of the Color Removal Efficiency of Different Mosses Species from Dye Solutions
Get PDFIn this study, Acid Red 88 (Sodium 4-(2-hydroxy-1-naphthalenylazo)-naphthalenesulfonate) dye solution, which is used extensively in textile industry, was used. Dye removal efficiency determination studies were firstly performed by using three moss species, Chiloscyphus polyanthus, Cinclidotus pachylomoides and Palustriella Falcata (Hedw). In the case of comparison of color removal efficiency of Chiloscyphus polyanthus, Cinclidotus Pachylomoides and Palustriella Falcata (Hedw), it was seen that the species with the highest color removal efficiency with increasing dye concentration was determined for Palustriella Falcata (Hedw). Furthermore, the effect on color removal efficiency was determined at specific concentration, pH and under UVA (Ultraviolet-A) lamp light by using a photo reactor with these mosses species. It has also been detected that these three mosses can be used in photocatalytic studies. Thus, these three mosses species can be employed as color removing material both separately and with UVA light