Osmaniye Korkut Ata University Academic Repository
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Anthocyanin-Based Natural Dyes and Nanoscale Coatings
No full textAnthocyanins are water-soluble colorants that are responsible for color development in the plant kingdom. They are preferred as coloring agents in textiles, pharmaceuticals, cosmetics, foods and drinks due to their biomedical properties like free radical scavenging, anti-microbial, ultraviolet (UV) protection, anti-cancer, anti-inflammatory, anti-diabetes and toxic-free nature. There are hundreds of them in the plant, which are derivatives of pelargonidin, delphinidin, petunidin, malvidin, peonidin and cyanidin. They are temperature and pH dependent and when applied on textiles they suffer from poor lightfastness. The exploitation of chemical and natural mordants in the dyeing process has been reported to circumvent their challenges as colorants for textiles. These challenges are reported by several researchers to be better alleviated by mordanting using chemical-or biomordants in nanoscale form or nanocoating the dyed substrates. This chapter discussed the sources, biosynthesis, extraction/isolation, forms and properties of anthocyanins and the nanoscale coating of their dyed textiles. © The Author(s)
Uterine microbial ecology and disease in cattle: A review
No full textDue to the critical contribution of the uterine-associated microbiota in reproductive health, physiology, and performance, culture-independent methods have been increasingly employed to unravel key aspects of microbial ecology in the uterus of cattle. Nowadays, we know that bacterial diversity is crucial to maintain uterine health, however, there is still no consensus on the exact composition of a healthy uterine microbiota (or eubiosis). Generally, loss of bacterial diversity (or dysbiosis) contributes to the development of uterine infections, associated with increased relative abundances of Bacteroides, Fusobacterium, Trueperella, and Porphyromonas. Uterine infections are highly prevalent and gravely influence the profitability of cattle operations, animal welfare, and public health. Thus, understanding the dynamics of uterine microbial ecology is essential to develop effective strategies focused on preventing and mitigating the adverse effects of uterine dysbiosis as well as assisting in the process of restoring the core, healthy uterine microbiota. The aim of this review is to summarize research conducted in the microbial ecology of bovine uteri. We discuss the origin of the uterine microflora of healthy cows and the factors influencing its composition. In addition, we review the biology of specific pathogens that are known to increase in abundance during the occurrence of uterine disease. Lastly, we provide an overview of the bacterial biofilm in the bovine endometrium, and we briefly summarize the rationale for the use of probiotics to prevent uterine disease in cattle
The relationship of stigma level and healthy lifestyle behaviors in individuals with type 2 diabetes
No full textAim: This study is a descriptive research aiming to examine the relationship between the level of stigma and healthy lifestyle behaviors in patients with Type 2 diabetes. Materials and Methods: This study was conducted with 142 patients who were admitted to a university hospital between October 1 and December 15, 2022. Data were obtained with the sociodemographic form, Stigma Assessment Scale (SAS) and Healthy Lifestyle Behaviors Scales (HLBS). Results: The mean SAS score of the patients participating in the study was 43.66±12.09, and the mean HLBS score was 125.83±21.48. The highest scores were in physical activity and interpersonal relationships, HLBS was generally at a moderate level, and a statistically significant negative correlation was found between SAS and HLBS scores (p<0.05). Conclusion: It was observed that the SAS and HLBS scores were at a moderate level in type 2 diabetes patients, education affected the level of stigma, gender and marital status affected the HLBS score, and healthy lifestyle scores significantly decreased as the level of stigma increased
Effect of Political Stability, Geopolitical Risk and R&D Investments on Environmental Sustainability: Evidence from European Countries by Novel Quantile Models
No full textThis research investigates the effect of political stability and geopolitical risk on environmental sustainability (ES) by considering R&D investments in nuclear and renewable energy. Considering the high political stability and recent energy crisis and increasing geopolitical risk, the study focuses on three leading European countries. We use the load capacity factor, include data between 1985/1 and 2020/12, and apply quantile on quantile regression (QQ), Granger causality in quantiles (GQ), and quantile regression (QR) models. The study finds that in higher quantiles (i) increasing political stability stimulates the ES in Sweden and the United Kingdom; (ii) increasing geopolitical risk supports the ES in France; (iii) R&D investments increase the ES in all the countries; (iv) there are generally causal effects from the explanatory variables to the ES except some quantiles (0.45-0.50) in all the countries; (v) the power effects of the variables differ according to countries, quantiles and variables
Şehirler Divanı’na veyahut Klasik Türk Edebiyatında Şehir Şiirlerine Ekler
No full textKlasik Türk edebiyatında şehir, karye, belde, kasaba, köy gibi bir mekânı merkeze alan ve genel olarak şehir şiirleri olarak adlandırılan manzumeler bulunmaktadır. Şairlerin çeşitli vesilelerle kaleme aldıkları bu şiirlerin büyük çoğunluğunda bir yerleşim yerinin doğal güzellikleri, mimari yapıları ve insanları methedilir. Methiye muhtevalı şehir şiirlerinin yanında hiciv, eleştiri, şikâyet ve mersiye içerikli manzumelerle de karşılaşmak mümkündür. Şehir şiirleri ile ilgili son zamanda yapılan bir kitap çalışmasında 600 manzume şekil, muhteva, dil ve üslup açışından incelenmiştir. Bu makalenin konusu ise söz konusu kitapta ele alınan 600 şehir şiiri içerisinde olmayan 24 yeni şehir şiiridir. Kaynak taraması sonucu elde edilmiş bu 24 şehir şiiri İstanbul, Edirne, Bitlis, Çekmece, Hüsrev Paşa, Konya, Kudüs, Manisa, Medine, Kâğıthane, Şam, Halep, Üsküdar ve Tiran üzerine yazılmıştır. Bu manzumelerden 22 tanesi methiye, 2 tanesi ise hiciv ve şikâyet şiiridir. Yazıda öncelikle klasik Türk edebiyatı şehir şiirleri hakkında kısa bilgiler verilecek ve ardından yeni tespit edilen şiirler incelenecektir. Böylece şehir şiirleri konusunda bir adım daha atılmış ve yapılacak yeni çalışmalar için kapı aralanmıştır
Kek Üretiminde Dikkat Edilmesi Gereken En Önemli Etmen Olarak Formül Dengesi
No full textAs a finished product, cake is made from many ingredients, and the quantity, quality and function of these ingredients, as well as the technology used in production, are of great importance in achieving the desired superior quality cake production. The quality of the cake is influenced by many factors: the suitability of the ingredients used for the specific type of cake being made, the quality of the ingredients, the balance of the recipe, the temperature of the ingredients before mixing, the mixing and baking method, the temperature, specific gravity and pH values of the batter obtained at the end of mixing, the amount of batter placed in the pan, the baking time and temperature, the holding conditions of the cake after baking, etc. This study highlights the main factors that affect cake quality and the issues that need to be addressed in cake production. As a result of many scientific researches we have conducted on this subject, it has been shown with analytical results that the most important factor influencing the quality of cake production is the balance of the recipe (the balance of the cake batter recipe in terms of the components it contain
MISTLETOE ( LORANTHUS EUROPAEUS JACQ.): ANTIOXIDANT ANTIMICROBIAL AND ANTICHOLINESTERASE ACTIVITIES
No full textPlants are natural resources responsible for different biological activities. Determining the biological activities of plants is very important. In our study, some biological activities and total phenolic and flavonoid contents of Loranthus europaeus Jacq. were determined. In this context, ethanol and methanol extracts of the plant were obtained using the soxhlet device. Total antioxidant, total oxidant, and oxidative stress statuses were determined using Rel Assay kits. Antimicrobial activity was tested against standard bacterial and fungal strains using the agar dilution test. Anticholinesterase activity was determined by detecting acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activities. Determination of total phenolic content was determined using the Folin-Ciocalteu reagent. Total flavonoid quantification was performed using an aluminum chloride assay. As a result of the study, TAS values (Total antioxidant status) of ethanol and methanol extracts of the plant were determined as 5.620 +/- 0.134 and 6.384 +/- 0.134 mmol/L, respectively. TOS values (Total oxidant status) were determined as 10.997 +/- 0.183 and 13.368 +/- 0.222 mu mol/L, respectively. OSI values (Oxidative stress index) were measured as 0.196 +/- 0.004 and 0.209 +/- 0.003, respectively. TPC (Total phenolic content) value was determined as 34.49 +/- 1.78 and 55.82 +/- 2.34 mg/g, respectively, and TFC (Total flavonoid content) value was determined as 46.10 +/- 2.40 and 55.49 +/- 1.15 mg/g, respectively. Ethanol and methanol extracts of the plant were found to be effective against bacterial and fungal strains at concentrations between 50-200 mu g/mL. In addition, the anti-AChE values of ethanol and methanol extracts were determined as 13.51 +/- 0.81 and 22.79 +/- 1.86 mu g/mL, respectively, and the anti-BChE values were determined as 27.84 +/- 0.62 and 33.08 +/- 1.63 mu g/mL, respectively. According to the results obtained, it was determined that L. europaeus has antioxidant, antimicrobial, and anticholinesterase activity. In this context, it is thought that it can be used as a natural material in pharmacological designs
Deep learning-based recognition of construction activities in real construction site environment
No full textPurposeToday's technological advancements have had a significant impact on the construction industry. Managing and controlling complex construction projects has been made significantly easier using technological tools. One such advancement is the automatic identification of workers' activities. This study aims to classify construction worker activities by analyzing real-time motion data collected from sensors.Design/methodology/approachIn accordance with our specific goals, we utilized advanced deep-learning methodologies such as deep neural networks, convolutional neural network, long short-term memory and convolutional long short-term memory to analyze the data thoroughly. This involved experimenting with various window sizes and overlap ratios to determine the optimal combination that would result in the most accurate predictions.FindingsBased on the analysis results, the convolutional long short-term memory (ConvLSTM) deep learning model with a window size of 4.8 s and an overlap rate of 75% was found to be the most accurate prediction model. This model correctly predicted 98.64% of the basic construction worker activities in a real construction site environment.Originality/valuePrevious studies have mainly been conducted in laboratory environments and have focused on basic construction activities such as lifting, moving, sawing and hammering. However, this study collected data from real workers in a real construction site environment. Various deep learning models were employed to determine the most accurate one. Additionally, several options were tested to determine the optimal window size and overlap ratio during the data segmentation phase, aiming to select the most suitable ones for preparing the data for the model.Osmaniye Korkut Ata University Scientific Research Projects Unit [OKUBAP-2022-PT2-008]This work was partially supported by Osmaniye Korkut Ata University Scientific Research Projects Unit (Project No: OKUBAP-2022-PT2-008)
Synthesis, characterization, and investigation of solid-state flexible supercapacitor application of molybdenum borid
No full textYenilenebilir enerji kaynaklarından enerji elde edilmesi ve bu enerjinin ihtiyaç duyulduğunda kullanılabilmesi açısından enerji depolama büyük önem taşımaktadır. Son yıllarda süperkapasitörler için çeşitli enerji depolama malzemeleri üzerine araştırmalar hızla artmıştır. Bir süperkapasitör elektrodundaki malzemenin değerlendirilmesi için; yüksek performanslı süperkapasitör cihazlarının tasarımı ve geliştirilmesi amacıyla, spesifik güç ve enerji yoğunluğu, elektriksel iletkenlik, yüzey özellikleri, dayanıklılık, yüzey alanı ve gözenek boyutu dağılımı açısından umut verici sonuçlar göstermesi gerekmektedir. Günümüzde, süperkapasitör elektrotlarının endüstriyel uygulamaları tatmin edici değildir. Bu tez çalışmasında basınçsız sinterleme metodu ile Molibden Alüminyum Borür (MAB) fazı sentezlenmiştir. Yüksek verimli MoB (MBene) sentezi için NaOH ve LiF-HCl aşındırma çözeltileri kullanılarak molibden alüminyum borür fazının kimyasal eksfoliasyonu sunulmaktadır. Aşındırma çözeltileri, suda katmanlar arası Al'yi seçici olarak molibden alüminyum borürden çıkararak 2D MoB nanoyapıları oluşturmaktadır. Bu nedenle, daha iyi nanoyapı verimi elde etmek için farklı Al afinitelerine sahip aşındırma çözeltilerinin seçimi araştırılmıştır. MAB'ın farklı aşındırma çözeltileri ile kimyasal eksfoliasyonunun bir sonucu olarak elde edilen MBene numuneleri olan 25HT/MoAl1–xB ve 10/MoAl1–xB'nin XRD analizinde ortaya çıkan karakteristik zirvelere göre tetragonal ortorombik MoB oluştuğu, 25/MoAl1–xB ve LiF-HCl/MoAl1–xB 'de ortaya çıkan karakteristik zirvelere göre tetragonal ortorombik MoB oluştuğu görülmüştür. Farklı aşındırma çözeltileri uygulanması ile iki farklı MBene (MoB) yapıların ortaya çıkması sonucunda dikkat çekici bir bulgu elde edilmiştir. 10/MoAl1-xB'nin interdigit elektrotlu süperkapasitör uygulaması gerçekleştirilmiştir. Üretimi gerçekleştirilen MoB nanotabakaları; SEM, BET, XRD ve EDS analiz teknikleri uygulanarak karakterize edilmiştir. MoB elektrotlarının süperkapasitör performansları hakkında bilgi edinilmesi ve enerji depolama alanında kullanabilirliğini incelemek amacıyla numunelere CV, GCD ve EIS analiz teknikleri uygulanmıştır.Energy storage is of great importance for obtaining energy from renewable energy sources and using this energy when needed. In recent years, research on various energy storage materials for supercapacitors has rapidly increased. For the evaluation of the material on a supercapacitor electrode; it is necessary to show promising results in terms of specific power and energy density, electrical conductivity, surface properties, durability, surface area and pore size distribution for the design and development of high-performance supercapacitor devices. Today, the industrial applications of supercapacitor electrodes are not satisfactory. This thesis focuses on the synthesis of the molybdenum aluminum boride (MAB) phase using a pressureless sintering method. Chemical exfoliation of the molybdenum aluminum boride phase is presented for the synthesis of highly efficient MoB (MBene) using NaOH and LiF-HCl etching solutions. The etching solutions create 2D MoB nanostructures by selectively removing interlayer Al from molybdenum aluminum boride in water. Therefore, the selection of etching agents with different Al affinities has been investigated to obtain better nanostructure yield. According to the characteristic peaks revealed by XRD analysis of 25HT/MoAl1–xB and 10/MoAl1–xB, which are MBene samples obtained as a result of chemical exfoliation of MAB with different etching solutions, orthorhombic MoB was formed according to the characteristic peaks revealed in 25/MoAl1–xB and LiF-HCl/MoAl1–xB, tetragonal MoB was formed. A remarkable finding was obtained as a result of the emergence of two different MBene (MoB) structures by applying different etching solutions. The supercapacitor application of 10/MoAl1-xB with interdigit electrodes was realized. The produced MoB nanosheets were characterized by applying SEM, BET, XRD and EDS analysis techniques. CV, GCD and EIS analysis techniques were applied to the samples in order to obtain information about the supercapacitor performance of MoB electrodes and to investigate their usability in energy storage
ELİPS ŞEKİLLİ BORU DEMETİ ISI DEĞİŞTİRİCİSİNDE AKIŞ VE ISI TRANSFERİ
No full textBu çalışmada, kaydırılmış sıralı dizilişe sahip boru demetinde dairesel, elips ve dairesel ile elips şekilli boruların birlikte kullanıldığı durumlar için akış ve ısı transferi performansı sayısal olarak incelenmiştir. Akış, iki boyutlu, sıkıştırılamaz, kararlı ve türbülanslı varsayılmıştır. İncelenen geometriler için ısı transferi yüzey alanları eşit kabul edilerek eşdeğer çap D_e=16,4 mm olarak alınmıştır. Akışkan olarak hava kullanılmış ve boru demeti giriş hızı (V_g), 1 m/s ile 6 m/s aralığında değiştirilmiştir. V_g=6 m/s’de, elips şekilli boru demeti için basınç düşümü ve ısı transferinin dairesel şekilli olana göre, sırasıyla, %75,19 ve %18,14 daha az olduğu ve bu durumun da %230,08’lik bir ısıl verim artışına karşılık geldiği belirlenmiştir