Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(77)
- Merdan, Mehmet(73)
- Duran, Celal(54)
- Ozdes, Duygu(50)
- Baltaci, Cemalettin(45)
- Kaygusuz, Abdullah(45)
- Kulakaç, Nurşen(39)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(37)
- Demir, Selim(36)
- Öztürk, Serkan(36)
- Dokuz, Abdurrahman(35)
- Turan, Ibrahim(35)
- Araz, Onur(33)
- Kandemir, Raif(31)
- Sipahi, Ferkan(30)
- Topal, Fevzi(30)
- Kurt, Kemal(28)
- Peker, Iskender(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Ozturk, Samet(27)
- Aydin, Aydanur(26)
- Vural, Alaaddin(26)
- Bayrakdaroglu, Serdar(25)
- Kurnaz, Muammer(25)
- Reis, Hatice Catal(25)
- Akar, Zeynep(24)
- Aydin, Faruk(24)
- Gücer, Mehmet Ali(24)
- Topal, Meryem(24)
- Yolcu, Halil(24)
- Yücel, Cem(24)
- Anaç, Halil(23)
- Kankal, Murat(23)
- Ürkek, Bayram(23)
- Aliyazicioglu, Yuksel(22)
- Günen, Mehmet Akif(22)
- Tuncer, Metin(22)
Yayınlar
- MakaleAçık Erişim2022Effects of spray and freeze-drying methods on aroma compounds, sensory characteristics, physicochemical composition, antioxidant and antimicrobial properties of instant sage (Salvia rosifolia Sm.) tea
Baltaci, Cemalettin; Akşit, Zeynep; Şidim, Muhammed
Sage is used as an aroma and spice in foods around the world. With its strong and even bitter taste, sage has been traditionally used as an effective solution to many health problems for centuries. It is a rich plant with many bioactive compounds. In this study, instant tea production was performed from the dried samples of the sage plant (Salvia rosifolia Sm.) using two drying methods; freeze-drying and spray-drying. The sensorial, physicochemical, antioxidant and antimicrobial properties of the products obtained by both methods were analyzed. Color values, solubility in water, moisture analysis (21.3% spray-dried; 4.0% freeze-dried), free radical scavenging activity (DPPH), Trolox Equivalent Antioxidant Capacity (TEAC), Ferric reducing/antioxidant power assay (FRAP), aroma analysis, protein analysis (5.5% spray-dried; 5.7% freeze-dried), ash, mineral, antimicrobial and sensory analyses were performed. Significant differences were found between two soluble tea obtained by the spray-drying and the freeze-drying methods. In general, the antioxidant capacities are higher in freze-dried samples. All of the 61 aroma components were detected in freeze dried samples while only 18 of them were detected in spray dried samples. In addition to their differencies; plenty of bioactive components, easy to use, ready to drink herbal tea have been produced with both techniques.
AtıfOpenAlex8TR Dizin2
İncele - MakaleAçık Erişim2022Geochemical investigation of the potability of surface water in Çit River and related creeks in Avliyana Basin (Gümüşhane, NE Türkiye)
Saka, Fatih; Soylak, Mustafa; Bulut, Volkan Numan; Vural, Alaaddin; Gundogdu, Ali
In the study, physico-chemical parameters of Çit Stream and related creeks in Avliyana Basin (Gümüşhane, NE Turkey) were determined. In terms of physical parameters, it is seen that the Büyük Çit Stream has drinking water quality. According to piper diagram, all of the samples except one have fallen into region of class of CaCO3 and MgCO3 waters. The different one is the mixed water class. It has been determined that the metal content that may pose a risk to water is below the permissible limits. It has been seen that there may be only one point of risk for lead. As a result, physico-chemical aspect of water quality of Çit River and related creeks in Avliyana Basin has been seen to be suitable for drinking water standards.
AtıfOpenAlex2İncele - MakaleAçık Erişim2022Growth-Development, Yield and Quality Characteristics of Aronia Varieties Grown in Pots
Çelik, Hüseyin; Karabulut, Besim; Uray, Yahya
This study was carried out to determine the growth, development, yield and some quality characteristics of Nero and Viking Aronia varieties grown in open field and pot in Samsun ecological conditions. Three-year-old Aronia plants were planted in 80-liter pots containing a 1:1:1 (v/v) mixture (barnyard manure+soil+sand) and 5 plants were included in each replication. Number of shoots, flower buds and clusters, berry weight (g), yield (g/plant), firmness (N), number of fruits per cluster, must yield (ml/100g), TSSS (%) and pH values were measured in Aronia cultivars. In addition, monthly shoot growth rate (cm/month) was determined and phenological observations recorded. According to Viking and Nero Aronia varieties, the number of shoots (7.8 and 7.6 pieces), the number of flower buds (22.63 and 22.85 pieces), the number of clusters (45.06 and 44.80 pieces), the weight of berry (0.82 and 0.79 g), the fruit number in the bunch (21.45 and 21.53 pieces), berry firmness (4.90 and 5.35 N), amount of must (49.67 and 54.00 ml/100 g) and TSS (17.07 and 16.47) and pH values (3.65 and 3.52) were found to be close to each other. Bud burst (10 March), flowering (26 April), berry set (12 May) and harvest time (24 August) were also similar in cultivars. It was also revealed that while the shoot length was 97.47 cm and 95.47 cm on March 11, respectively, in Viking and Nero varieties, it reached 124.73 and 120.73 cm in August, five months later.
AtıfOpenAlex7TR Dizin4İncele - MakaleAçık Erişim2022Salkowski Curves and Their Modified Orthogonal Frames in 𝔼³
Şenyurt, Süleyman; Bektaş, Mehmet; Mazlum, Sümeyye Gür
In this study, we examine some properties of Salkowski curves in 𝔼³. We then make sense of the angle $(nt)$ in the parametric equation of the Salkowski curves. We provide the relationship between this angle and the angle between the binormal vector and the Darboux vector of the Salkowski curves. Through this angle, we obtain the unit vector in the direction of the Darboux vector of the curve. Finally, we calculate the modified orthogonal frames with both the curvature and the torsion and give the relationships between the Frenet frame and the modified orthogonal frames of the curve.
AtıfOpenAlex13TR Dizin7İncele - MakaleAçık Erişim2022Assessing ursolic acid contents of some commonly consumed herbs grown in Turkey
Koca, Ilkay; Zannou, Oscar; Ipekci, Burak; Odabaş, Halil İbrahim
Ursolic acid is a triterpenoid compound in the plant kingdom and has important biological functions. In this study, ursolic acid contents of nine herbs including Anethum graveolens (dill), Camellia sinensis L. (green tea), Lepidium sativum L. (garden cress), Ocimum basilicum L. (sweet basil), Petroselinum crispum L. (parsley), Rosmarinus officinalis L. (rosemary), Salvia officinalis L. (sage), Thymus vulgaris L. (thyme) and Urtica dioica L. (nettle) were determined by High-Performance Liquid Chromatography (RP-HPLC-UV). Based on the results from the analysis of herbs, ursolic acid contents varied between 0.20% and 7.11%. The ursolic acid content was highest in rosemary and sage (7.11±0.20% and 6.63±0.27%, respectively), while the lowest content of ursolic acid was in nettle (0.20±0.10). It is expected from the results of this work to contribute to the knowledge on the nutritional value of commonly consumed herbs in Turkey and encourage their consumption as functional foods.
- Derleme MakaleYalnız künye2022Mix Reality in Reducing Operational Anxiety
Aydin, Aydanur; Gürsoy, Ayla; Serpici, Ayşe
Augmented reality and virtual reality are some of the innovative products found in the healthcare industry. The use of these products in the hospital environment is becoming widespread today. The use of these methods can contribute to changing the diagnosis or treatment experiences that cause individuals to experience negative emotions with these products with different areas of use. In addition, it is predicted that both methods can produce effective results in the fields of health education in individuals, developing desired behavior in health management, preparing and disseminating programs for patient information and behavioral changes. It has been determined that these technologies, which produce effective results in the management of stress and anxiety, have similar results in the operating room. The article discusses the results of using virtual and augmented reality technologies for different purposes in healthcare. The information discussed is expected to raise awareness of the usage areas of the technologies in question and to shed light on studies for different areas of use.
- Derleme MakaleYalnız künye2022The Effects of High Intensive Interval Training (HIIT) on Brain-Derived Neurotrophic Factor (BDNF) and Cardiovascular Health: A Review
Bayrakdaroğlu, Serdar; Topsakal, Nuri; Eken, Özgür
High-intensity interval training (HIIT) programs have lately gained popularity because they produce beneficial adaptations for both inactive and athletes, as well as positive health and performance benefits and time efficiency. Therefore, it was purposed to review scientific research results about the effects of HIIT programs on BDNF and cardiovascular health. Although there are research findings suggesting that HIIT may be an effective strategy for promoting elevation of BDNF concentrations, current research seems to be rather limited and inconclusive. It can be thought that exercise intensity is a factor affecting BDNF activation. In healthy people, there seems to be a positive linear relationship between exercise intensity and BDNF levels of acute exercise. However, further experimental studies are needed to elucidate the effect of HIIT on BDNF in humans with metabolic or cardiovascular diseases. However, it can be suggested that high intensity can be an significant achievement factor to design an effective exercise programs and the HIIT methodology has a critical importance for improving cardiovascular function, particularly in healthy individuals. In conclusion, while existing studies show that high-intensity interval training (HIIT) programs can improve cardiovascular health in some populations, further scientific research is needed to determine the efficiency of this strategy in producing physiological adaptation to exercise.
- MakaleAçık Erişim2022The Impact of the Ukraine-Russia Conflict on the Aviation Sector: February-May 2022
Açıkel, Bırsen; Akbarli, Araz; Öndeş, Ezgi Begüm; Gezer, Dilek
Aviation; it is a global sector that affects many areas such as education, trade, tourism, and is also affected by many situations such as epidemics, economic fluctuations, political disagreements and military intervention. For this reason, the disagreement between Ukraine and Russia also quietly affects the aviation industry. Although disagreements seem to continue between the two countries, issues such as the closure of airspaces, changes in flight costs as a result of changing routes, the situation of aircraft and component manufacturers, tourism and aviation security concern aviation globally. In this study, which was conducted to reveal the impact of the Ukraine-Russia conflict on the aviation sector, case study research, one of the qualitative research methods, was used. In a four-month period, sources such as newspaper news, internet news sites, websites of authorities were scanned, and it was tried to reveal how the conflict was reflected in the aviation industry. This method was chosen considering that it is suitable for this study in terms of revealing what happened in the past, how people were affected, how the processes took place, and what the results were. Between February 24 and March 2, when the disagreements between the two countries began, all flights to Ukraine were stopped, while air traffic in neighbouring countries decreased. International passenger traffic of Russian airlines decreased by at least four times in March 2022 compared to March 2021, and by sixteen times compared to March 2019. The Ukraine-Russia conflict also negatively affected the flight times of passenger flights between East and West. As a result of the study, the great impact of the four-month period, which is thought to be short, on the aviation sector has been tried to be revealed.
AtıfOpenAlex21TR Dizin1İncele - MakaleAçık Erişim2022Photovoltaic Mobile Charging System Design (Solar Pole) - in Gümüşhanevi Campus of Gümüşhane University
Basoglu, Mustafa Engin; Ertuğrul, Murat Han; Çayır, Muzaffer; Şen, Nurgül
The decrease in fossil-based resources, the pollution of the environment and the threat of sustainability constantly increase the interest in renewable energy sources. Solar energy is one of the leading renewable energy sources due to its large capacity. Today, solar energy appears in many applications. In this study, a photovoltaic-based solar pole design has been realized and a prototype that can be applied almost anywhere in open-air conditions has been produced. The prototype produced was tested and installed at Gümüşhane University's Gümüşhanevi Campus. The prototype mobile phones produced have a fast charging feature with 5V-2A. In future studies, it is planned to provide the solar tracking feature to the photovoltaic (PV) panel in the system, and it is aimed to bring such systems to the campus in general.
- Derleme MakaleYalnız künye2022Possible Hazards And Risks That Search And Rescue (SAR) Dogs May Face In CBRN Incidents
Cengiz, Sevil
Professional search and rescue (SAR) dogs, which are members of urban search and rescue teams with the help of their higher sense organs with rigorous training, are very helpful in finding buried or missing persons in disasters. In these environments where chaos and disorder prevail, it becomes inevitable for them to face very dangerous and risky situations. As a result of a disaster caused by chemical, biological, radiological and nuclear (CBRN) accidents, dangers such as chemical leaks, pathogenic microorganisms, toxins, vectors, and radioactive and nuclear materials in the environment are among the forgotten or neglected facts that SAR dogs affect as well as affect humanity. Working with little or no personal protective equipment during search and rescue interventions makes them completely vulnerable to these hazards. In the limited resources in the literature on CBRN risks and dangers that search and rescue dogs working in disaster areas may encounter, SAR dogs are exposed to many chemicals and toxic agents during these studies, as well as biological hazards such as protozoal or coliform bacterial organisms, and radiological hazards such as the risk of ingesting radioactive materials and breathing dust. their arrival has been determined. With this study, it was aimed to emphasize the dangers faced by SAR dogs and to emphasize what has been done and what should be done to reduce the possible risks. As a result, necessary precautions should be taken to prevent and/or reduce these possible exposures of SAR dogs, and further studies should be carried out for appropriate standard procedures for appropriate rehabilitation and decontamination.
- MakaleAçık Erişim2022Vecdi Akyüz’ün Kur’an’da Siyasi Kavramlar İsimli Eseri ve Manzuriddin Ahmed’in Islamic Political System in the Modern Age: Theory and Practice İsimli Eseri’nin Kavramsal Açıdan Kıyası
Aytekin, Ayşe
Çeşitli içeriklere sahip metinleri veya dînî mesajları anlama ve yorumlamada -yeni yöntemlere sahip bir inceleme tarzıyla oluşturulan- odak kavramların veya anahtar kelimelerin, bu kelimelerin ilintili olduğu alanların ve bu alanların özelliklerinin tespit edilmesi önemli bir husustur. Kutsal metnin dönemi ve çağdaş insanın dönemi arasındaki anlama ve anlamlandırma farkı ancak bu şekilde telafi edilebilir. Bu minvalde, insanlara aktarılmak istenen ilâhî mesajların çeşitli kavram kalıpları içerisinde sunulduğu kutsal metinlerin anlamlandırılma sürecinde odak kavramların çözümlenmesi ve anlaşılması diğer metinlere göre çok daha lüzumludur. Nitekim, Kur’ân-ı Kerîm’de yer alan, temel sözlük anlamlarının yanı sıra yan anlamları haiz odak kavramların mana boyutlarını ve Kurânî siyakta kazandığı yeni anlam alanlarını doğru şekilde incelemek ve bu terimlerin fehvâ serüvenlerini başarılı bir şekilde keşfetmek, hem mesajın anlaşılması ve uygulanması bakımından hem de Tefsir ilmine sağladığı katkı bakımından oldukça kıymetlidir. Dolayısıyla, Tefsir Tarihi sürecinde Kur’ân’ın anlaşılması adına geliştirilen klasik yöntemler ve zengin tarihî ve ilmî tecrübeyle birlikte kavram örgüsü ile donatılmış ilâhî mesajların yorumlanmasında alan ve kavram çözümlemesi bir zorunluluktur. Tefsir faaliyetlerinin tarih içerisinde ilk dönemlerden itibaren günümüze kadar kesintisiz bir şekilde devam ediyor olması onun gerekliliğinin bir göstergesi ve yansımasıdır. Tefsir faaliyeti yolculuğu içerisinde zamanlar, mekanlar, dönemler, koşullar, gereksinimler ve yorumlar değişmiş olsa da bu faaliyetteki söz, fikir, çaba, malzeme ve ürünler çağdaş insanların yorumu ve ihtiyacı açısından son derece zarurîdir. Söz konusu ürünlere -Tefsir faaliyetlerinin, yöntemlerinin ve çeşitlerinin özelleşmesini takip eden dönemde- siyaset, kültür, ekonomi gibi hayatın içerisindeki temel alanların söz ve yorum kapsamında ne derece etki ettiği, hangi merhalelerde faydalı olduğu, hangi merhalelerde zarara neden olduğu gibi hususların tespiti Tefsir çalışması sürecinde sağlıklı bir analiz açısından değerlidir. Zira, hayatın temel özellikleri, unsurları, etkileri ve gereklilikleri temel kılavuz olan kutsal sözde da yer almaları hasebiyle ilâhî maksada erişebilmek için titizlikle incelenmelidir. Titizlikle incelenmesi gereken alanlardan olan siyaset, hayatın en önemli ve aktif alanlarından, toplumların ise en etkili kurumlarından biridir. Nitekim siyaset, diğer toplumların varoluş ve iktidar dönemlerinde olduğu gibi İslâm toplumu içerisinde de aynı ihtimama sahiptir. Sosyal hayatta diğer kurumlarla ve alanlarla ilişkili olduğu gibi ilâhî sözde de çeşitli meselelerde kendisine yer bulmaktadır. Kur’ân’ın hem vahiy dönemi şartlarındaki hem de vahiy sonrası dönemdeki yorum faaliyetlerinde ağırlıkla işlenen konu da siyasettir. Çalışmamızda, bu denli önemli bir meselenin ilâhî emre ve kurallara uyarak mutlu ve huzurlu bir hayat sürdürmek için araştırılması gerektiği kanaatimizle birlikte Kur’ân-ı Kerîm’de hangi kavram ve bağlamlarda yer aldığını ve bu kavramları inceleyen birbiriyle bağlantılı iki eserde nasıl değerlendirildiğini analiz etmeyi amaçlamaktayız. Bu minvalde, siyasetle ilgili kavramları Kur’ân perspektifi ve düzleminde araştıran iki eser çalışmamıza konu olmaktadır. Bu eserler Vecdi Akyüz’ün Kur’an’da Siyasi Kavramlar isimli eseri ve Manzuriddin Ahmed’in Islamic Political System in the Modern Age: Theory and Practice isimli eseridir. Eserlerin müellifleri farklı zaman, kültür ve coğrafyalarda doğmuş, yaşamış, yetişmiş, farklı alanlarda ihtisas yapmış olsalar da Kur’ân’da yer alan siyasi içeriğe sahip kavramları incelemeleri ve yorumlamaları bakımından ortak paydada buluşmaktadırlar. Makalemizde söz konusu siyasi içerikli terimleri ilâhî söz ekseninde ve farklı uzmanlıklara sahip bu iki müellifin yorumları bağlamında incelemeyi hedeflemekteyiz.
- MakaleAçık Erişim2022A Mathematical Model of Susceptible Diabetes Complication (SDC) Model in Discrete Time Fuzzy and Crisp Environment
Merdan, Mehmet; Şişman, Şeyma
In this study, we examined the mathematical model of the discrete-time equation system with susceptible diabetes complication (SDC), which is known to be caused by environmental and genetic factors in a fuzzy environment. From the diabetes complication (DC) model, the susceptible diabetes complication (SDC) model is being developed. It was obtained using definitions of how the behavior of this model changes in a fuzzy environment. A nonlinear differential equation system transforms the sensitive diabetes complication (SDC) model into a discrete time equation system. Stability analysis of the model with jury criterion was examined. In addition, numerical solutions and graphics of the analysis of the discrete model in fuzzy environment are obtained by using the MATLAB package program.
AtıfOpenAlex2İncele - MakaleAçık Erişim2022Analysing user resistance to distance learning systems by academics within the COVID-19 pandemic using the technology acceptance model
Çam, Handan; Bekar, Fevziye
The aim of this study is to determine academics’ user resistance to distance learning, their perceptions of the distance learning systems and factors affecting their perceptions of the changes in the education system during the COVID-19 pandemic. The study’s population consists of 440 academics working in 43 different universities in Turkey. The research sample were determined through convenience and snowball sampling methods. The data were collected using an online questionnaire form created within Google Forms. After validity and reliability analyses on the data, eight different hypotheses were tested using structural equation analysis. All eight hypotheses proposed within the study were accepted after receiving the results of this analysis. The results of the study show that user resistance has a significantly negative effect on the users that utilise distance learning. However, the perceived ease of use and usefulness have a significantly positive effect on attitude and behavior.
- MakaleAçık Erişim2022Determination of physical, chemical and antioxidant properties of pomegranate sauces sold in Turkish markets
Baltaci, Cemalettin; Akar, Bülent; Kamış, Yunus Emre
This study aimed to determine the physical, chemical and antioxidant properties of pomegranate sauces sold in the Turkish markets. A total of eighteen pomegranate sauces, seventeen of which were purchased from the market, and one produced in a rotary evaporator, were analyzed with respect to antioxidant activity, titratable acidity, brix, hydroxymethylfurfural (HMF), pH, color, and sugar. The antioxidant activities of the samples were analyzed by six different methods, including DPPH (2,2-diphenyl-1-picrylhydrazil) radical scavenging activity, ferric reducing antioxidant power (FRAP), ABTS●+ radical scavenging capacity, total antioxidant capacity assay (TAC), total phenolic content (TPC), and total flavonoid content (TFC) methods. The highest and lowest antioxidant activity values were as follows, respectively: 5.23 and 822.69 mg AA/kg for the DPPH method, 57.94 and 2380.94 mg FeSO4/kg for the FRAP method, 660.47 and 3690.83 mg AA/kg for the TAC method, 23.06 and 11680.71 mg QEE/kg for the TFC method, and 123.54 and 9566.95 mg GAE/kg for the TPC method. In addition, HMF contents of the most samples were below the permissible limit value (50 mg/kg), while some of them showed a heterogeneous distribution between 4.58 and 103.68 mg/kg. Such a heterogeneous distribution of the HMF contents may be due to the factors such as raw materials and additives used in production, applied heat treatments, production processes, and storage conditions. As a result, HMF content in pomegranate sauce can be reduced below the permissible limit if the production conditions comply with the standards.
AtıfOpenAlex6TR Dizin3İncele - MakaleAçık Erişim2022Heavy Metal Pollution from Listvenitization: In Case of Alakeçi (Bayramiç-Çanakkale/West Türkiye)
Vural, Alaaddin
This study aimed to investigate the risk of element/heavy metal pollution caused by listvenitization. In this context, the heavy metal pollution risk of listvenite-derived soils in the region where listvenitized ultrabasic rocks are present as a result of hydrothermal alterations in the vicinity of Alakeçi (Bayramiç Çanakkale/Western Türkiye) was investigated with pollution index, geoaccumulation index and integrated pollution risk parameters. For this purpose, Cu, Zn, Pb element concentrations of 350 soil samples collected from the field were determined, and Pollution Index (PI) and Geo-accumulation Index (Igeo) parameters for each element and Integrated Pollution Index (IPI) parameters for each sampling point were calculated. In addition, distribution maps of PI, Igeo and IPI parameters were plotted. When the site is considered in terms of IPI parameter, it has been determined that the site has medium and high pollution risk. When the field is considered in terms of PI and Igeo parameters, a remarkable level of pollution has been detected in the field, especially by Ni, Co and As elements. When the distribution maps of the PI, Igeo and IPI parameters are examined, it has been determined that the pollution risk is higher than the other areas, especially in the areas where hydrothermal alteration is intense and in the tectonic line areas. Although listvenitizations and listvenite zones are important target areas especially for epithermal gold mineralizations, this study has shown that listvenitization areas are also areas at risk of heavy metal pollution. Therefore, listvenitization zones are areas that should be investigated in terms of heavy metal pollution risk as well as epithermal gold mineralization potentials.
AtıfOpenAlex3TR Dizin1İncele - MakaleAçık Erişim2022Determination of LC-MS/MS phenolic profile, antioxidant and α-glucosidase enzyme inhibition activities of Linum mucronatum Bertol. subsp. armenum (Bordz.) P.H.Davis
Akar, Zeynep; Kılıç, Fatma
Plants include compounds having high antioxidant activity such as flavonoids, phenolics, and carotenoids. Antioxidant defense mechanisms play an important role in the prevention and treatment of oxidative stress diseases in humans. In the present study, the flower and leaf parts of Linum mucronatum subsp. armenum were extracted in five different solvents. The antioxidant activities of the extracts were determine using six antioxidant activity determination assays (Iron (III) reducing/antioxidant power (FRAP), DPPH radical scavenging activity, copper (II) reducing antioxidant activity (CUPRAC), ABTS radical scavenging capacity, total flavonoid content and total phenolic content). While, the methanol extract showed the highest activity for the flower part, ethanol extracts of leaf part showed the highest antioxidant activity in the DPPH, FRAP and CUPRAC tests. The highest activity values in both flower and leaf parts was measured in acetone extract with SC50=0.287 mg/mL and (SC50=0.163 mg/mL in ABTS test, respectively. Lowest activity values of solvent extracts were measured in hexane extracts in all tests. Phenolic compounds of the plant were identified using LC-MS/MS. These phenolics are kaempferol, vanillin, protecatechuic acid, caffeic acid, p-coumaric acid, p-OH benzoic acid, salicylic acid, quercetin and rutin. The leaf and flower parts have α-glucosidase enzyme inhibitor effect. It was determined that the leaf part of the plant (IC50=4.533 mg/mL) have higher enzyme inhibition than in the flower (IC50=6.096 mg/mL). As a result, it was determined that the plant showed the biological activity. The results will contribute to the studies on the biological activity of the other plant.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2022Homotopi pertürbasyon Elzaki dönüşümü yöntemi ile doğrusal olmayan zaman-kesirli kısmi diferansiyel denklemler için yeni yaklaşık analitik çözümler
Anaç, Halil
Bazı doğrusal olmayan zaman-kesirli mertebeden kısmi diferansiyel denklemler, homotopi pertürbasyon Elzaki dönüşümü yöntemi ile çözülmüştür. Kesirli türevler Caputo anlamında tanımlanmıştır. Uygulamalar homotopi pertürbasyon Elzaki dönüşümü yöntemi ile incelenmiştir. Bunun yanında, çözümlerin grafikleri MAPLE yazılımında çizdirilmiştir. Ayrıca homotopi pertürbasyon Elzaki dönüşümü yöntemi ve homotopi pertürbasyon Sumudu dönüşümü yöntemi çözümlerinin, lineer olmayan zaman- kesirli mertebeden kısmi diferansiyel denklemlerin tam çözümü ile mutlak hata karşılaştırması sunulmaktadır. Ek olarak, bu mutlak hata karşılaştırması tablolarda belirtilmiştir. Bu makalenin yeniliği, hem Caputo kesir dereceli gaz dinamiği denkleminin hem de Caputo kesir dereceli Klein-Gordon denkleminin bu yöntemle ilk analizidir. Bu nedenle, homotopi pertürbasyon Elzaki dönüşümü yöntemi, zaman-kesirli mertebeden kısmi diferansiyel denklemlerin analitik çözümlerinin elde edilmesinde hızlı ve etkilidir.
- MakaleAçık Erişim2022İş rolüne uygunluğun işe yönelik risk alma üzerindeki etkisinde kendini ifade etmenin düzenleyici ve aracı etkisi: rol kuramı perspektifi
Durmuş, İbrahim
Ulusal ve uluslararası eğitim düzeyinde bilimin her geçen gün daha fazla öneminin artması, akademisyenlerin organizasyonlarındaki faaliyetlerinin araştırılmasını gerekli kılmaktadır. Rol kuramını temel alan bu araştırmanın amacı, akademisyenin işine yönelik risk almasında iş rolüne uygunluğu ve kendini ifade edebilme davranışlarının etkilerini araştırmaktır. Araştırmada, tesadüfi olmayan yöntemlerden gönüllü örnekleme yöntemi ile belirlenen 400 akademisyene elektronik anket yapılmıştır. Elde edilen veriler SPSS, GSCA ve AMOS paket programları ile analiz edilmiştir. Araştırma analiz sonucunda; akademisyenin iş rolüne uygunluğunun risk alma davranışı üzerindeki etkisinde, kendisini üst derecede ifade etme davranışının düzenleyici etkisi olduğu gözlemlenmiştir. Akademisyenin iş rolüne uygun hareket etmesi risk alma davranışını pozitif ve anlamlı olarak etkilemiştir. İş rolüne uygunluğun risk alma davranışı üzerindeki etkisinde kendini ifade edebilme davranışı aracı etkiye sahip olmuştur. Akademisyenin iş rolüne uygunluğu kendini ifade edebilme davranışını pozitif ve anlamlı bir şekilde etkilemiştir. Ayrıca akademisyenin işyerinde kendini ifade edebilme davranışı işine yönelik risk alma davranışını pozitif ve anlamlı olarak etkilemiştir. Elde edilen sonuçlar akademisyenin, akademik çalışma ortamındaki özgün değerini ortaya koymaktadır.
- MakaleYalnız künye2022Investigation of usability of building rubble as road underfill
Külekçi, Gökhan; Osman Yilmaz, Ali
For resources to be used efficiently, the structures built on the earth must be long-lasting. The longevity of the roads built with a length of millions of kilometers per year is determined by the nature of the filling material, traffic, equivalent axle load, climatic effects, material fatigue, and layer thicknesses used. The fact that filling material complies with the standards and is easily available will ensure that the road construction works are both economical and long-lasting. Many building rubbles are formed from the buildings that have completed their lives in the urban transformation process. Storage and disposal of this building's rubble are very difficult. To eliminate these difficulties, the usage areas of the rubble should be increased. In this study, some mechanical experiments were carried out on the building rubble obtained from the Black Sea region, and these were interpreted. Grain density, freeze-thaw tests, Micro-Deval, and Determination of Fragmentation Resistance, tests were carried out according to TSE and ASTM standards of aggregates obtained from building rubble. The results obtained from the experiments were compared with the technical specifications of the General Directorate of Highways. It has been revealed that the analyzed aggregate can be used as road fill in highways.
- MakaleAçık Erişim2022Correlation of Mechanical and Tribological Properties of Zn-40Al-2Cu-2Si Alloy
Hekimoğlu, Ali Paşa; Savaşkan, Temel; Azakli, Zeki
An attempt was made to correlate mechanical (hardness and ultimate tensile strength) and tribological properties (friction coefficient, working temperature, wear volume and average surface roughness) of Zn-40Al-2Cu-2Si alloy which was prepared by permanent mold casting. The tribological properties of the alloy were determined using a block-on-cylinder type wear test machine. The relationships between the mechanical and tribological properties of the alloy determined by linear regression analysis were observed to be expressed by linear or straight-line equations. The correlation coefficients of these relationships were found to be between 0.94 and 0.99. These linear equations indicate that the friction coefficient and the wear volume of this alloy can be calculated in terms of either its hardness or tensile strength under the given working conditions. These linear relationships also showed that as the hardness and the tensile strength of the alloy increase the friction coefficient, working temperature, and wear volume of it decrease but its average surface roughness increases. These observations were explained in terms of the microstructure and mechanical properties of the alloy, adhesion theory of friction and the Archard wear law. The equations obtained by this correlation can also be used for the selection of Zn-40Al-based alloys for bearing applications.