Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(66)
- Merdan, Mehmet(56)
- Duran, Celal(50)
- Ozdes, Duygu(47)
- Kaygusuz, Abdullah(42)
- Demir, Selim(37)
- Turan, Ibrahim(37)
- Ashyralyyev, Charyyar(34)
- Dokuz, Abdurrahman(33)
- Araz, Onur(31)
- Öztürk, Serkan(31)
- Sipahi, Ferkan(30)
- Kandemir, Raif(28)
- Arslan, Mehmet(27)
- Karsli, Orhan(27)
- Kulakaç, Nurşen(26)
- Baltacı, Cemalettin(25)
- Gücer, Mehmet Ali(25)
- Kurt, Kemal(25)
- Maden, Nafiz(25)
- Ozturk, Samet(25)
- Topal, Fevzi(25)
- Baltaci, Cemalettin(24)
- Yücel, Cem(24)
- Aliyazicioglu, Yuksel(23)
- Bayrakdaroglu, Serdar(23)
- Kankal, Murat(23)
- Peker, Iskender(23)
- Yolcu, Halil(23)
- Reis, Hatice Catal(21)
- Topal, Meryem(21)
- Vural, Alaaddin(21)
- Aydin, Aydanur(20)
- Aydin, Faruk(20)
- Bayraktar, Alemdar(20)
- Kurnaz, Muammer(20)
- Çelik, Necati(20)
- Ürkek, Bayram(20)
- Cakir, Tufan(18)
- Günen, Mehmet Akif(18)
Yayınlar
- MakaleAçık Erişim2023Scopus SJRQ1Excited muon production in muon colliders via contact interaction
Sahin, M.; Caliskan, A.
In recent years, with the enlightenment of some issues encountered in muon colliders, muon colliders have become more feasible for the high-energy physics community. For this reason, we studied the single production of an excited muon in muon colliders via contact interactions. In addition, we assumed that the excited muon decayed into a photon and muon through gauge interactions. Then, signal and background analyses were performed in muon-antimuon collider options with center-of-mass energies of 6, 14, and 100 TeV. The attainable mass and compositeness scale limits were calculated for the excited muon in these collider options. Based on the calculations, it was concluded that muon-antimuon colliders would be a perfect collider option for excited muon investigations.
AtıfScopus1WoS1OpenAlex4
İncele - MakaleYalnız künye2023Scopus SJRQ3Trematodon and Ptychostomum Species New to Turkey and South-West Asia
Erata, Hüseyin; Batan, Nevzat; Alataş, Mevlüt; Ezer, Tülay
Abstract: During the recent bryofloristic studies in the Karçal mountain of the Artvin region (Caucasus), north of Turkey’s East Black Sea region, Trematodon ambiguus and Ptychostomum cyclophyllum were found as new species to Turkey and Southwest Asia. Descriptions, illustrations, new localities, geographic distribution, ecological characteristics, and comparisons with morphologically similar taxa were provided.
AtıfScopus3WoS3OpenAlex8İncele - MakaleAçık Erişim2023Scopus SJRQ1Investigating the EKC hypothesis with nanotechnology, renewable energy consumption, economic growth and ecological footprint in G7 countries: panel data analyses with structural breaks
Aydin, Mucahit; Koc, Pınar; Sahpaz, Kadriye Izgi
This study investigates the relationship between nanotechnological innovations, renewable energy consumption, economic growth, and ecological footprint for G7 countries within the framework of the Environmental Kuznets Curve (EKC) hypothesis. The study employs panel cointegration tests with structural breaks from 1990–2018. Nanotechnology is expected to reduce environmental degradation by increasing renewable energy consumption and energy saving. In this context, nanotechnological innovations are an essential tool for sustainable development. However, the literature also emphasizes that nanoparticle emissions from nanotechnology can negatively impact human and environmental health in the long term, and these need to be analyzed. In this context, this study is the first to empirically examine the relationship between nanotechnological innovations, renewable energy consumption, economic growth, and ecological footprint within the framework of the EKC hypothesis. The outcomes affirm that all variables are integrated with the long term. The results show that the EKC hypothesis is valid only in the USA. Nanotechnological innovations have a reducing effect on environmental degradation in the USA, whereas; they have an increasing impact on environmental degradation in Italy and the United Kingdom. Renewable energy consumption enhances environmental quality in Italy, Japan, the United Kingdom, and the USA. Based on these empirical findings, the government should pioneer to development of new the lowest nanoparticle-emitting nanotechnologies. And that way, it will be possible to encourage energy savings and renewable energy consumption more safely, and the effectiveness of sustainable development policies will increase.
AtıfScopus73WoS59OpenAlex76İncele - BildiriYalnız künye2023Performance Evaluation of Quantum-Resistant TLS for Consumer IoT Devices
Bozhko, Jessica; Hanna, Yacoub; Harrilal-Parchment, Ricardo; Tonyali, Samet; Akkaya, Kemal
Post-quantum (PQ) cryptographic algorithms are currently being developed to be able to resist attacks by quantum computers. The practical use of these algorithms for securing networks will depend on their computational and communication efficiency. In particular, this is critical for the security of wireless communications within the context of consumer IoT devices that may have limited computational power and depend on a constrained wireless bandwidth. To this end, there is a need to evaluate the performance of widely used application layer security standards such as transport layer security (TLS) to understand the use of the existing PQ algorithms that are being evaluated by NIST as a replacement to the current cryptographic algorithms. This paper focuses on two widely used IoT standards Bluetooth Low Energy (BLE) and WiFi to find out the optimal performing PQ algorithm for their security when used in end-to-end connections over the Internet. By implementing the capability for IP over BLE and all options of TLS connection establishment, we developed a client-server IoT testbed to measure the efficiency of PQ key encapsulation mechanisms (KEMs) and PQ digital signature algorithms. The test results showed that Kyber512 is the ideal KEM while Falcon-512 and Dilithium2 are the best signatures for BLE and WiFi devices. Based on this outcome, we developed a mechanism for IoT devices with multiple communication interfaces, that dynamically chooses a PQ KEM algorithm based on the MAC layer protocol being used at the time.
AtıfScopus26WoS15OpenAlex21İncele - MakaleAçık Erişim2023Scopus SJRQ3Wear Resistance of Aluminum Alloy A356 After Thorough Anodic Oxidation
Başyipit, Aziz Bariş; Azakli, Zeki; Gümrük, Recep; Bican, Osman
The efficiency of thorough anodic oxidation of ASTM A356 aluminum alloy as an alternative to painting its surface is studied. Microstructure, phase composition, and microhardness of oxidized layers of various thicknesses (45, 65, 80 and 90 μm) are determined. Solid particle erosion tests are conducted in accordance with ASTM G76 and MIL STD 3033. It is established that with an increase in oxidized layer thickness aluminum alloy wear resistance is reduced and the surface roughness is reduced.
AtıfWoS1İncele - MakaleYalnız künye2023Scopus SJRQ1The Effect of Burnout and Moral Sensitivity Levels of Surgical Unit Nurses on Job Satisfaction
Kulakaç, Nurşen; Uzun, Sevda
Purpose: This study was carried out to determine the effect of burnout and moral sensitivity levels of surgical unit nurses on their job satisfaction. Design: A descriptive and correlational design study. Methods: The population consisted of 268 nurses working in health institutions in the Eastern Black Sea Region of Turkey. The data were collected online between 1 and 30 April, 2022 using a sociodemographic data form, the Maslach Burnout Inventory, the Minnesota Job Satisfaction Scale, and the Moral Sensitivity Scale. Pearson correlation analysis and logistic regression analysis were used to evaluate the data. Findings: The nurses' moral sensitivity scale mean score was 105.2 ± 18.8, and the Minnesota job satisfaction scale mean score was 3.3 ± 0.7. The participants' mean emotional exhaustion score was 25.4 ± 7.3, the depersonalization score average was 15.7 ± 4.6, and the personal accomplishment mean score was 20.5 ± 6.7. The factors affecting the job satisfaction of nurses were found to be moral sensitivity, personal accomplishment, and satisfaction with the unit they worked. Conclusions: Nurses had high levels of burnout due to emotional exhaustion, one of the subdimensions of burnout, and moderate levels of burnout due to depersonalization and personal accomplishment. The moral sensitivity and job satisfaction of nurses are moderate. As the nurses' accomplishment and ethical sensitivity levels increased and their emotional exhaustion levels decreased, their job satisfaction levels increased.
AtıfScopus11WoS9OpenAlex16
İncele - MakaleAçık Erişim2023Scopus SJRQ1Breast cancer-related apps in Google Play and App store: evaluate their functionality and quality
Aydin, Aydanur; Gursoy, Ayla
Aim: This study aimed to evaluate the functionality and quality of breast cancer apps that can be accessed from Turkey. Methods: In this study, a systematic search strategy was used to identify free mobile apps on breast cancer available in the App and Google Play stores. According to the study’s PRISMA flowchart, 707 apps met the inclusion criteria. The Mobile App Rating Scale (MARS) assessed the quality of the apps. Results: Mobile apps focused on the categories of communication, education, and treatment order/plan. The mean MARS quality score for all apps was 3.4, and according to the mean score of the subscales, they were categorized as functionality, aesthetics, information quality, and participation. In addition, the mean scores of the subscales were listed on MARS as functionality, aesthetics, knowledge quality, and participation. Conclusion: Nowadays, “e-health” apps are attracting attention in the treatment of health problems. While the apps in download stores appear to provide basic information about breast cancer, they offer limited and personalized problem management related to prevention, early detection, and screening. Support from healthcare professionals and further efforts can be made to develop innovative technologies and apps that include evidence-based informational content about breast cancer. Implications for Cancer Survivors: In the process of breast cancer information, survivors can be encouraged to manage this process using e-health services.
AtıfScopus6WoS6OpenAlex13İncele - MakaleYalnız künye2023Scopus SJRQ2The Darboux trihedrons of timelike surfaces in the Lorentzian 3-space
Li, Yanlin; Mazlum, Sümeyye Gür; Aenyurt, Süleyman
The parameter curves (c1) and (c2) intersecting under the angle on a timelike surface and any curve (c) passing through the same point with these curves have six different cases according to their causal characters. In this study, the Darboux trihedrons of these three curves and the Darboux instantaneous rotation vectors of these trihedrons are separately calculated for each of these six cases, and the relationships between these vectors are given. In addition, some theorems and results have been obtained on this surface. Besides, the special cases where the parameter curves (c1) and (c2) intersect perpendicularly are examined and these cases are compared with previous studies.
AtıfScopus13WoS14OpenAlex15İncele - Derleme MakaleYalnız künye2023Scopus SJRQ1A Comprehensive Review of Computer-based Techniques for R-Peaks/QRS Complex Detection in ECG Signal
Dogan, Hulya; Dogan, Ramazan Ozgur
Electrocardiogram (ECG) signal, which is composite of multiple segments such as P-wave, QRS complex and T-wave, plays a crucial role in the treatment of cardiovascular disease. For an analysis of cardiac diagnosis, it is required that clinicians scan the ECG signal for QRS complex or R-peaks (the highest peak of the QRS complex) detection, which relies on their expertise and takes enormous time. In order to provide more realistic treatment of cardiovascular diseases, so many computer-based techniques detecting R-peaks/QRS complex in the ECG signal with noises and different characteristics have been actively developed in research article for many years. Moreover, researchers have created various data sets for R-peaks/QRS complex detection. Although R-peaks/QRS complex detection is one of the notable research areas with so many computer-based techniques and ECG data sets, no comprehensive review paper have been published recently. The main aim of this study is to present a wide range of computer-based techniques proposed for detection of R-peaks/QRS complex. First of all, in this study, computer-based techniques proposed in the literature for the detection of R-peaks/QRS complex and their stages are introduced in detail. The generalization ability of these techniques is investigated deeply. Details are given about the most preferred ECG data sets produced in the literature for the analysis of computer-based techniques. Finally, the performances of computer-based techniques and generalization abilities are analyzed for each data set created in the literature by giving the results of the evaluation metrics.
AtıfScopus30WoS21OpenAlex30İncele - MakaleAçık Erişim2023Scopus SJRQ4Evaluation of stability in rock-fill dams by numerical analysis methods: a case study (Gümüşhane-Midi Dam, Türkiye)
Sari, Mahmut
Serious stability issues could arise both during and after construction if the dams’ body designs are not realistically accurate. Engineering studies are therefore crucial for identifying the body’s instability prop-erties in designing the dam body. In this study, horizontal and vertical displacement and stress-deformation analyses were carried out on the body of the Midi Waste Dam located in Karamustafa Village of Gümüşhane Province. In these analyses, the elasticity modulus and Poisson’s ratio of the soil were determined using the seismic method, which is one of the commonly used geophysical methods. The cohesion and internal friction angle of the rock fill were determined by taking into account Leps’ charts. The state of the dam body under the influence of the siltation load and seismic load at the end of operation was shown by applying the finite element method. It was found that there was no instability issue with the researched dam because the safety numbers obtained from the stability study of the dam body were greater than the 1.2 safety number accepted for the stability of the dams (SRF: 2.03, SRF: 1.37). The maximum vertical displacement of the dam body at the foundation base was found as 3.78 cm, the horizontal displacement as 5.80 cm, and the total displacement amount as 6.75 cm when the dam body was examined in terms of displacements. In terms of the statics of the dam body, the vertical, horizontal, and total displacements estimated with the numerical analysis methods did not present a problem, and it was demonstrated that this scenario was also supported by the stability of the body in the applied analyses.
AtıfScopus7WoS7İncele - MakaleAçık Erişim2023Scopus SJRQ1Determination of Elemental Contents and Microbiological and Chemical Properties of Çökelek Cheeses Consumed in Turkey
Kalaycı, Nagihan; Ürkek, Bayram; Öztürk, Feyza; Şengül, Mustafa; Çiftçi, Esengül
The Çökelek samples what 30 different were collected from randomly local bazaars to investigate heavy metal contaminant and mineral levels and some physicochemical and microbiological properties of samples. While the Pb was identified in 6 of the 30 samples, the As was only found in 4 of the samples. The mean major and trace element contents of Çökelek samples were ordered as Na > P > Ca > K > Mg and Al > Zn > Ni > Cu, respectively. The physicochemical properties indicated a high deviation among samples. The mean total solids, ash, salt, fat, protein waters soluble nitrogen contents, and sample ripening index were 29.83%, 1.88%, 0.68%, 4.31%, 19.84%, 0.33%, and 1.79%, respectively. The mean total aerobic mesophilic bacteria (TAMB) count of Çökelek samples was found as 8.26 log CFU g−1. The coliform bacteria and yeast-mold counts were detected in 11 and 27 of 30 samples, respectively. The mean coliform and yeast-mold counts were 1.82 log CFU g−1 and 7.11 log CFU g−1, respectively. Traditional cheeses are not mentioned in legal laws such as the Turkish Food Codex. So, there is no legal limit and standard production processes. This situation is a problem in terms of traditional cheese quality. For this reason, traditional cheese should perform further studied, and determine the legal limits.
AtıfScopus4WoS4OpenAlex9İncele - MakaleAçık Erişim2023Scopus SJRQ4The Effect of a Musical Toy on Preschool Children’s Pain and Anxiety During Blood Collection; [Okul Öncesi Dönem Çocuklarında Kan Alma İşlemi Sırasında Işıklı Dönen Müzikli Oyuncağın Ağrı ve Anksiyeteye Etkisi]
Kurudirek, Fatma; Demir İmamoğlu, Zeynep; Ekici, Sümeyye
Objective: This study examined the effect of providing a lighted, rotating musical toy on preschool children’s pain and anxiety during a blood collection procedure. Methods: The randomized controlled study was conducted on a sample of children aged 4-6 years who applied to the blood collection unit of a state hospital in Turkey from July 1 through August 1, 2022. The data were obtained from 95 children who met the research criteria (48 in the control group and 47 in the intervention group). Stratification and block randomization methods were used to determine the experimental and control groups. The variables of gender and fear of interference were used in the stratification of the children. The Family and Child Information Form, Child Fear and Anxiety Inventory, and Wong–Baker Facial Expression Rating Scale were used to collect the data. Results: The pain scores of the children in the experimental group were found to be lower (1.42 ± 1.05) than those in the control group (2.81 ± 1.23), and the result was statistically significant (P < .001). During the procedure, the mean Child Fear and Anxiety Inventory score of the children in the experimental group (1.21 ± 0.97) was lower than that of the control group (2.72 ± 1.10), and the difference was statistically significant (P < .001). Conclusion: This study found that providing a lighted, rotating musical toy to children aged 4-6 during blood collection effectively reduced their pain and anxiety. In line with these results, it is recommended that nurses and parents use such a toy in blood collection units to reduce pain and anxiety in children.
AtıfScopus4WoS3OpenAlex2TR Dizin1
İncele - MakaleYayıncıda açık erişim2023Scopus SJRQ4Postoperative symptom management perceptions and coping experiences of individuals with prostate cancer
Kazımoğlu, Hatem; Ulutaşdemir, Nilgün; Kulakaç, Nurşen; Uzun, Sevda
Objective: This study aims to examine in depth the perceptions of postoperative symptom management and coping experiences of individuals with prostate cancer. Material-Method: The study was conducted with 15 individuals with prostate cancer using a phenomenological research design, which is a qualitative research design. Interviews were conducted via the WhatsApp application. Results: The data were analysed using Colaizzi's phenomenological method. In the data analysis, two categories, five main themes, and 15 sub-themes emerged. In the category of symptom management perception, there are themes of pain management processes, the use of complementary and alternative therapies and practices to cope with symptoms and improve quality of life. In the category of coping experiences, the themes of individual coping, interpersonal relations, and productivity were obtained. Conclusion: Our study suggests that individuals with prostate cancer have difficulty in symptom management in the postoperative coping process, but they managed them effectively with the support of their spouse, family, and health care professionals.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2023Scopus SJRQ2LC-HRMS Profiling and Phenolic Content, Cholinesterase, and Antioxidant Activities of Terminalia citrina
Özler, Ebubekir; Topal, Fevzi; Topal, Meryem; Öztürk Sarıkaya, Sevim Beyza
Terminalia citrina (T. citrina) belongs to the Combretaceae family and is included in the class of medicinal plants in tropical countries such as Bangladesh, Myanmar, and India. The antioxidant activities of lyophilized water (WTE) and alcohol extracts (ETE) of T. citrina fruits, their phenolic content by LC-HRMS, and their effects on cholinesterases (ChEs; AChE, acetylcholinesterase, and BChE, butyrylcholinesterase) were investigated. Especially ten different analytical methods were applied to determine the antioxidant capacity. Compared with similar studies for natural products in the literature, it was determined that both WTE and ETE exhibited strong antioxidant capacity. Syringe and ellagic acids were higher than other acids in ETE and WTE. IC50 values for ETE and WTE in DPPH radical and ABTS⋅+ scavenging activities were calculated as 1.69–1.68 μg mL−1 and 6.79–5.78 μg mL−1, respectively. The results of the biological investigations showed that ETE and WTE had an inhibition effect against ChEs, with IC50 values of 94.87 and 130.90 mg mL−1 for AChE and 262.55 and 279.70 mg mL−1 for BChE, respectively. These findings indicate that with the prominence of herbal treatments, T. citrina plant may guide the literature in treating Alzheimer's Disease, preventing oxidative damage, and mitochondrial dysfunction.
AtıfScopus13WoS8OpenAlex14İncele - MakaleAçık Erişim2023Scopus SJRQ3Agreement Between Nurses’ Anxiety And Depression Levels And Their Compliance With Isolation Measures During The Covid 19 Pandemic: An Online Cross-Sectional Study
Demir Doğan, Melike; Aydin Sayilan, Aylin; Sayilan, Samet
Aims: The purpose of this study was to determine the relationship between nurses’ anxiety and depression levels and their compliance with isolation measures during the COVID-19 pandemic. Background: The global COVID-19 pandemic has had severe psychological impacts on nurses. Methods: Following receipt of the requisite approvals, data were collected actively from 289 nurses consenting to participate in the study through an online questionnaire using theinternet/ social media. Results: Mean stress, anxiety, and depression scores were higher among carers for COVID-19 patients than in non-Covidcarers. Analysis revealed significant positive correlation between Isolation Precautions Compliance Scale scores and stress, anxiety, depression, and burnout. Conclusion: Burnout increased while compliance with isolation precautions decreased in this study as stress, anxiety, and depression increased.
AtıfScopus12WoS9OpenAlex5İncele - MakaleYalnız künye2023Scopus SJRQ3Economic and Institutional Determinants of Corruption: The Case of Developed and Developing Countries
Acaravci, Ali; Artan, Seyfettin; Hayaloglu, Pinar; Erdogan, Sinan
Since ancient times, corruption has been one of the essential topics for economists and politicians. Moreover, it is a concern for both developed and developing countries and a significant obstacle to economic development. The primary objective of this paper is to examine the relationships between corruption, economic growth, internet use, and quality of governance alongside other institutional and economic variables in 65 developed and developing countries for the period 1999–2016 by using dynamic panel data methods performing well under cross-sectional dependence. The empirical results can be summarized as follows. The augmented mean group (AMG) results indicate statistically significant relationships between corruption, economic growth, internet use, quality of government, and democracy. Also, we find that an increase in economic growth and quality of governance contribute to reducing corruption in these 65 developed and developing countries. In contrast, an increase in internet use and democracy level raises corruption. The policy implications of the empirical estimations are also discussed in the paper.
AtıfScopus11WoS8OpenAlex17İncele - MakaleYalnız künye2023Scopus SJRQ3Investigation of the effect of liquid phase of digested biomass on Phaseolus vulgaris L. var. ellipticus Mart under NaCl stress
Çiftçi, Fida; Acet, Tuba; Saribiyik, Oǧuz Yunus
The factors such as global warming, wild irrigation, and synthetic fertilisers pollute the soil and increase salinity. The salinity is defined as salt stress for plants, and plants have developed various tolerance mechanisms to survive under salt stress conditions. Therefore, efforts to increase the tolerance of salt sensitive plants such as beans (Phaseolus vulgaris) are considered important. Additionally, considering problems that appear depending on global warming, understanding the tolerance mechanisms, and activating them by using natural and sustainable solutions are important for plant growth and preventing lower agricultural productivity. In this study, the effect of biofertiliser obtained from a small-scale bioreactor on a plant exposed to salt stress on the development of morphological, physiological, and biochemical properties of the model plant, Phaseolus vulgaris L. var. ellipticus Mart (Pve) were investigated. The biofertiliser application increased the amount of chlorophyll, flavonoids, anthocyanin, and proline while the amount of hydrogen peroxide and lipid peroxidation decreased in the plant. This change enhanced the enzyme activities of catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX) and the plant formed tolerance to the salt stress. As a result, the biofertiliser application to the plant may activate the tolerance mechanism against salt stress.
- MakaleAçık Erişim2023Scopus SJRQ1Daily precipitation performances of regression-based statistical downscaling models in a basin with mountain and semi-arid climates
Şan, Murat; Nacar, Sinan; Kankal, Murat; Bayram, Adem
The impacts of climate change on current and future water resources are important to study local scale. This study aims to investigate the prediction performances of daily precipitation using five regression-based statistical downscaling models (RBSDMs), for the first time, and the ERA-5 reanalysis dataset in the Susurluk Basin with mountain and semi-arid climates for 1979–2018. In addition, comparisons were also performed with an artificial neural network (ANN). Before achieving the aim, the effects of atmospheric variables, grid resolution, and long-distance grid on precipitation prediction were holistically investigated for the first time. Kling-Gupta efficiency was modified and used for holistic evaluation of statistical moments parameters at precipitation prediction comparison. The standard triangular diagram, quite new in the literature, was also modified and used for graphical evaluation. The results of the study revealed that near grids were more effective on precipitation than single or far grids, and 1.50° × 1.50° resolution showed similar performance to 0.25° × 0.25° resolution. When the polynomial multivariate adaptive regression splines model, which performed slightly higher than ANN, tended to capture skewness and standard deviation values of precipitations and to hit wet/dry occurrence than the other models, all models were quite well able to predict the mean value of precipitations. Therefore, RBSDMs can be used in different basins instead of black-box models. RBSDMs can also be established for mean precipitation values without dry/wet classification in the basin. A certain success was observed in the models; however, it was justified that bias correction was required to capture extreme values in the basin.
AtıfScopus26WoS27İncele - MakaleAçık Erişim2023Scopus SJRQ2Energy and economic assessments of waste heat recovery by designs of economizer, condensing economizer and air preheater; [Ekonomizer, yoğuşmalı ekonomizer ve hava ön ısıtıcı tasarımları ile atık ısı geri kazanımının enerji ve ekonomik değerlendirilmesi]
Terhan, Meryem; Özağdaş, Emre; Omar, Muhammed Arslan
In this study, the waste heat loss of flue gases from the boilers of Kafkas University district heating system has been calculated between 6-8% according to the combustion analysis and the annual cost of this heat loss has been found as $58,658.79. In terms of energy efficiency and the national economy, we think that this lost energy should be recovered as much as possible and fuel and energy savings should be achieved. In the paper, the effects of variants such as air excess coefficient, flue gas temperature, boiler capacity and fuel consumption on the heat recovery from flue gas have been presented in detail. The heat recovery scenarios have been presented for reusing this waste energy for space heating, domestic hot water, and preheating combustion air and the applicability of these scenarios has been investigated in terms of thermodynamics and economics. According to the results of the study, in the second scenario examined to cover the domestic hot water need of the guest house building, the energy savings of the scenario can be provided during 20 years of economic life is $122,820.83, and it has the highest savings income among the scenarios. In addition, it is possible to recover approximately 50% of the flue gas loss with thanks to the scenario. On the other hand, the third scenario of heating the boiler combustion air with waste heat is the easiest and most economical scenario because its payback period is only one year, and there are no extra excavation and pipe costs.
AtıfScopus2WoS2OpenAlex5TR Dizin3İncele - MakaleYalnız künye2023Scopus SJRQ2Endemic Mountain Tea (Sideritis dichotoma Huter): Antioxidant and Antibacterial Activities, Mineral Content by ICP-MS and Phytochemical Content by LCHR-MS
Öztürk Sarıkaya, Sevim Beyza; Zehiroğlu, Cuma
Endemic Sideritis dichotoma Huter, herbal tea, is used for colds, coughs and digestive ailments. Since at least 25 % of the active ingredients of pharmacological drugs are obtained from plants, it is important to investigate many plants, both traditionally used and whose potential hasnt yet been discovered, before they disappear. When the results compared to other Sideritis species, it has better antioxidant activity in DPPH⋅ scavenging activity, Fe3+ and Cu2+ reducing capacity methods and is also rich in minerals, necessary for human body, K, Mg, Ca, P, S. Zone values (10–19,5 mm) obtained on S. aureus, P. aeruginosa, E. coli, S.enteritidis, E. faecalis, P. putida and K. pnemoniae strains are an indication that the plant has antibacterial activity. 27 secondary metabolites were identified by LC-HRMS. Verbascoside, pharmacologically active compound known to have antitumor effect, cytotoxic selectivity and anticancer activity, is the most abundant phenolic in ethanol extract (49297.13 mg/kg).
AtıfScopus7WoS6OpenAlex8İncele