Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(12)
- Şahin, Engin(9)
- Bayram, Sinan(8)
- Dirican, Ebubekir(8)
- Ertugrul, Mehmet(8)
- Kaya, Yunus(8)
- Sefali, Abdurrahman(8)
- Kul, Sinan(7)
- İspirli, Hümeyra(7)
- Ayata, Ümit(6)
- Kutlu, Naciye(6)
- Gerçek, Yusuf Can(5)
- Kömür, Gökhan(5)
- Ramahi, Omar M.(5)
- Çelik, Saffet(5)
- Özdemir, Akın(5)
- Artar, Musa(4)
- Ayazoglu, Rabil(4)
- Can, Zehra(4)
- Ecem Bayram, Nesrin(4)
- Ekmekyapar Torun, Fatma(4)
- Hasar, Ugur C.(4)
- Hasar, Ugur Cem(4)
- Kamiloğlu, Aybike(4)
- Karaali, Rabi(4)
- Keskin, Savaş(4)
- Ozden, Erdemalp(4)
- Sunaoglu, Serife Kazanci(4)
- Taylan, Osman(4)
- Ustabulut, Mete Yusuf(4)
- Akkoyunlu, Ebubekir(3)
- Apak, Ömer Ceyhun(3)
- Aras, Selim(3)
- Battal, Fetullah(3)
- Carbas, Serdar(3)
- Cebeci, Fatma(3)
- Gökçe, H.S.(3)
- Hırca, Tuğçe(3)
- Izginli, Mucahit(3)
- Kadakal, Huriye(3)
Yayınlar
- MakaleYalnız künye2022Scopus SJRQ3Investigation of Manganese Ion Removal from Waters Using Sewage Sludge Ash
Şahset, İrdemez; Duygu, Yeşılyurt; Torun, Ekmekyapar; Fatma; Sinan, Kul; Züleyha, Bıngül
In this study, the removal of Mn2+ ions from waters by the adsorption method using ash obtained from a treatment plant sludge burning unit, which is treatment plant waste and mostly disposed of in a landfill, was investigated. By determining the most suitable conditions for adsorption, adsorption kinetics, isotherms, and thermodynamic values were determined. In the experiments, 63.9% removal efficiency was achieved using 10 g/L adsorbent concentration for 10 mg/L Mn+2 under optimum conditions. As a result of the research, it was determined that the adsorption proceeds according to the pseudo-second-degree reaction and abides by the Langmuir isotherm. The thermodynamic constants of ΔH°=-4.866 kJ/mol and ΔS°= 21.44 J/mol were determined. As a result of this, the reaction was exothermic, spontaneous, and random, and adsorption was physical adsorption. As a result of the study, sewage sludge ash can be used in the treatment of water containing low concentrations of Mn2+.
AtıfScopus4OpenAlex2
İncele - MakaleYalnız künye2022Scopus SJRQ2A study on the effects of nanostructure reinforcement on the failure load in adhesively bonded joints after the subjected to fully reversed fatigue load
Akpinar, Salih; Demir, Kübra; Gavgali, Esma; Yetim, Ali Fatih
Today, adhesively bonded joints are frequently used in the space and aviation industries. Joints used in these sectors are generally subject to dynamic loads due to environmental factors. This study experimentally and numerically investigated the static tensile loads of adhesively bonded joints after fully reversed (combination of tensile and compressive) fatigue loading where nanoadhesives–obtained by adding carbon nanostructures into aerospace grade structural adhesive–were used to bond the joints. Single lap joint specimens were produced using a nanocomposite adhesive obtained by adding 1 wt. % graphene, 1 wt. % carbon nanotubes-COOH and 1 wt. % fullerene C60 nanostructures to a DP460 structural adhesive. AA2024-T3 aluminum alloy and carbon fiber-reinforced composites (CFRCs) with a plain weave fabric (0/90°) were used as adherend materials. First, static tensile tests were applied to these joints to obtain their failure loads and then fully reversed sinusoidal fatigue tests were applied under a constant load amplitude, a frequency of 20 Hz and a load ratio of R = −1. Considering the failure loads obtained from the static tensile tests, 106 fully reversed fatigue loading cycles were applied–which was accepted as an infinite life–at 400 N, 800 N and 1200 N load levels. The static tensile failure loads and energy values absorbed of these joints were obtained and the change in the failure loads and energy values absorbed of the joints subjected to fatigue was investigated. The static failure loads of aluminum joints bonded with nanoadhesive and subjected to fully reversed fatigue loading increased by approximately 5% to 17%, depending on the nanostructure type added to the adhesive. Moreover, it was observed that there was an increase in loading of approximately 3% to 20% for the nanostructure reinforced joints obtained by using CFRCs with [0/90]6 stacking sequence.
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İncele - MakaleAçık Erişim2022Scopus SJRQ2A novel internal curing method for 3D-printed geopolymer structures reinforced with a steel cable: Electro-heating
Gökçe, H.S.; Güngör, O.; Öksüzer, N.
Buildability and structural integrity are the inherent challenges of 3D printed geopolymer structures needed to be overcome. Reinforcing with steel cable ensuring a higher structural integrity of the printed structure can simultaneously improve the buildability due to the heating capability of this component. The controllable instant heating capability of steel cable was achieved by the use of a specific circuit system in the study. As a novel internal curing technique, electro-heating is recommended in the additive manufacturing of steel cable-reinforced geopolymer structures by the authors.
AtıfScopus4WoS3OpenAlex5İncele - Kitap BölümüYalnız künye2022Foreign Language Apprehension and Interview Success
Dolgunsöz, Emrah
A job interview (or employment interview) is a common hiring method involving a conversation between a job applicant (interviewee) and a representative of an employer (interviewer) which is conducted to assess and evaluate the suitability of the applicant for the job (Dipboye, Macan and Shahani-Denning 2012). Depending on the company profile, the type of position and the job requirements, applicants are assessed and evaluated by companies in various dimensions ranging from presentability to academic efficiency. Although the criteria of companies vary a lot, all interviews engender a phenomenon called interview anxiety. It is generally the sum of annoying and unpleasant feelings before or during a job interview (McCarthy and Goffin 2004) due to reasons such as lack of control during interviews (Jones and Pinkney 1989) or being evaluated by a stranger in an interactional environment (Ayres et al. 1998). Common symptoms of interview anxiety manifest in long and frequent pauses while talking, slow speech or licking lips (Feiler and Powell 2016). Besides the regular procedures of employment interviews, global companies operating in non-English-speaking countries also assess the English language competency of the applicants during interviews. These companies value proficiency in English and it is a vital prerequisite of international communication for these types of companies. Foreign language (mostly English) assessment commonly focuses on the oral skills of the applicants and how good they are at communicating in the English language. The inclusion of this evaluation in job interviews certainly has merit; however, it also has the potential to increase the anxiety experienced during interviews due to the phenomenon called foreign language anxiety (FLA). Anxiety, in general, is defined as a common subjective feeling of unease, discomfort, and worry often accompanied by some physiological symptoms. FLA refers to the specific type of anxiety that emerges in a foreign language context (MacIntyre 1999). FLA causes low foreign language performance causing anxious individuals to commit various linguistic and phonological errors. Considering that employment interviews are already anxiety-provoking processes, this study hypothesizes that the inclusion of foreign language assessment during interviews elevates anxiety due to FLA, and aims to examine how this experience affects employment interview success.
- MakaleAçık Erişim2022Scopus SJRQ2Assessment of waste-to-energy potential of ELT management: An actual case study for Erzincan
Güngör, Osman; Tozlu, Alperen; Arslantürk, Cihat
End-of-life tires (ELTs) and their decomposition are becoming a major environmental issue in the local region as a result of economic and technological challenges. Despite this, ELT management is gaining popularity as an advanced function for treating tires to obtain char, oil, and gas products using pyrolysis. The main goal of this article is to integrate data from an actual recycling plant with the activities of pyrolysis products and their physical properties in the literature. This article presents energy potentials and basic applications of pyrolysis products as well as advances in the current situation in ELT management in the world. Accordingly, an existing ELT management in Erzincan, Turkey is explained in detail by considering the available energy recovery and material treatment activities. In this plant, which has an installed power capacity of 12 MW, approximately 25 tons of pyrolytic oil, 10.7 tons of pyrolytic gas, 24 tons of carbon black and, 10.4 tons of steel are produced daily. The calorific values of carbon black and pyrolytic oil for the products leaving the pyrolysis plant are close to the values in the literature, which is promising. In the plant, the overall thermal efficiency of the system and the engine is found to be 26.34% and 51.24%, respectively. On the other hand, to supply additional power to the plant utilizing exhaust gas discharged to the atmosphere, some thermodynamic models can be developed; additionally, more rational values can be obtained through thermoeconomic and optimization.
AtıfScopus1WoS2OpenAlex3İncele - Kitap BölümüYalnız künye2022Reflections on sustainable consumption in the time of the COVID-19 pandemic
Yildiz, Tuğba; Başar, Enes Emre
The COVID-19 pandemic, which has caused severe diseases and deaths around the world, impacts not only health, but also daily lives, economies, and social systems. It is observed that consumers' purchasing patterns and preferences have changed significantly along with the new normal brought by the pandemic. For example, tons of plastic waste each day caused by disposable masks used to prevent the spread of viruses and the dramatic increase in disposable plastic tableware waste caused by the increasing number of food deliveries and takeaway meals as a result of measures such as social distancing and quarantine lead to significant environmental concerns. Furthermore, the additional packaging waste generated by e-commerce trades, which increases incrementally every day, is also an important source of environmental concerns. Although a growing number of consumers are interested in preserving the environment and participating more actively in sustainable consumption around the world, the changes caused by COVID-19 in their lives deeply affect sustainable consumption behaviors. Therefore, the discussion of how sustainable consumption behaviors of consumers are affected during the pandemic may contribute to the development of new strategies in this field. From this point of view, the effects of environmental concerns and sensitivity on sustainable consumption were first discussed from different aspects in this section. Then, the reflection of the pandemic on consumer behaviors was analyzed within a general framework. Finally, how the pandemic influenced the tendency toward sustainability was revealed.
- Kitap BölümüAçık Erişim2022Poverty and City Safety
Alacadağli, Esmeray
Children are people’s gateway to the future; they are 30.3% of the world’s population. Childhood is a stage that has a great impact on adulthood and children being healthy individuals. For this reason, child poverty and childhood conditions are very important for individual and community life. Cities are places where people live, and more than 50% of the world’s population lives there. In the cities, whose numbers and sizes have increased over time, the crimes committed have also increased and diversified. For this reason, it has become increasingly difficult to provide urban security today. The aim of this study is to show the relationship between child poverty and urban safety, by carrying out an overview of the global perspective and examining the case of Turkey. Copyright 2022 Esmeray Alacadağlı Published under exclusive licence by Emerald Publishing Limited.
- MakaleAçık Erişim2022Scopus SJRQ1Grey Zone: A Gap between Heavy and Severe Exercise Domain
Ozkaya, Ozgur; Balci, Gorkem Aybars; As, Hakan; Cabuk, Refik; Norouzi, Mahdi
The aim of this study was to determine a critical threshold (CT) interpreted as “the highest exercise intensity where V̇O2 can be stabilized before reaching 95% of V̇O2max (V̇O2peak)” and compare it with commonly used anaerobic threshold indices. Ten well-trained male cyclists volunteered for this study. Ventilatory threshold (VT) was determined from incremental tests. Multisession constant-load trials were performed to reveal V̇O2max. Mathematically modeled critical power (CP) was estimated through the best individual fit parameter method. Maximal lactate steady state (MLSS) was detected by 30-minute constant-load exercises. The individual CT load of each cyclist was tested by constant-load exercises to exhaustion with +15 W intervals until minimal power output to elicit V̇O2peak. The results showed that work rate corresponding to CT (329.5 6 41.5 W) was significantly greater than that of the MLSS (269.5 ± 38.5 W; p = 0.000), VT (279.6 ± 33 W; p = 0.000), and CP (306.3 ± 39.4 W; p = 0.000), and CP overestimated both VT and MLSS (p = 0.000). There was no significant V̇O2 difference between the 10th and 30th minute of MLSS and MLSS + 15 W exercise (0.36–0.13 ml·min-1·kg-1; p = 0.621). Exercising V̇O2 response of MLSS + 15 W could not exceed the level of 95% V̇O2max (57.02 ± 3.87 ml·min-1·kg-1 and 87.2 ± 3.1% of V̇O2max; p = 0.000), whereas V̇O2 responses greater than 95% of V̇O2max were always attained during exercises performed at CT + 15 W (64.52 ± 4.37 ml·min-1·kg-1 and 98.6 6 1% of V̇O2max; p > 0.05). In conclusion, this study indicates that there is a “grey zone” between heavy and severe exercise domain. This information may play a key role in enhancing athletic performance by improving the quality of training programs.
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İncele - BildiriYalnız künye2022Boosting Dependency Parsing Performance by Incorporating Additional Features for Agglutinative Languages
Altıntaş, Mücahit; Tantuğ, A. Cüneyd; Vicic, J.; Kavsek, B.
In recent studies, the use of language models has increased noticeably and has made quite good contributions. However, using the proper representation and taking into account the complementary components are still among the issues to be considered. In this research, the impact of sub-word level sentence piece based word representation on the performance of dependency parsing has been demonstrated for agglutinative languages. Furthermore, we propose to use the sentence representation that holds all meaning of the sentence as an additional feature to improve dependency parsing. Our proposed enhancements are experimented on nine agglutinative languages; Estonian, Finnish, Hungarian, Indonesian, Japanese, Kazakh, Korean, Turkish, and Uyghur. We found that the sentence piece based token encoding has contributed parsing performance for the majority of the experimented languages. Using the entire meaning of the sentence as a complementary feature has enhanced parsing performance for six languages out of nine.
- MakaleAçık Erişim2022Scopus SJRQ1Thermoeconomic analysis of a low-temperature waste-energy assisted power and hydrogen plant at off-NG grid region
Tozlu, Alperen; Kayabasi, Erhan; Ozcan, Hasan
In this study, thermoeconomic analysis of a CO2 power cycle and PEM hydrogen system using ultra-low temperature waste heat from a milk production facility is conducted. In the transcritical CO2 cycle, low-temperature LNG evaporation is used for cooling the condenser to increase the temperature difference enabling low temperature waste heat use. In addition, a PEM electrolyzer produces hydrogen to reduce the LNG requirement at the plant. A CO2-water exchanger has been designed to recover the pasteurized water's excess heat and evaporate the CO2 using Simcenter-Flomaster software. The inlet mass flow rates and outlet temperatures of the heat exchanger were optimized by performing thermoecomic analysis, and the thermal and economic performance of the facility was examined. The power cycle has 14% higher efficiency when LNG is used as the heat sink compared to ambient temperature condensation with an electricity production cost range at 0.05–0.11 $/kWh, and the hydrogen generation cost is between $2.6–5.20 kg−1. It is found that the plant could only be economically feasible when less than 50% of the power produced is used for hydrogen generation. Consequently, the proposed system can co-generate power and on-demand hydrogen in off-NG grid regions with reasonable investment and product costs.
AtıfScopus6WoS6OpenAlex8İncele - MakaleAçık Erişim2022Scopus SJRQ3Research Tendencies of Postgraduate Theses Related to Pre-Service Turkish Teachers/Candidates
Maden, Aslı; Ustabulut, Mete Yusuf
In the study, it is aimed to determine the postgraduate theses related to pre-service Turkish teachers and their candidates and to reveal the research tendencies by analyzing them according to certain characteristics. For this purpose, the distribution of postgraduate theses on Turkish teacher candidates according to year, program type, university, subject, method and design characteristics was examined and thus their tendencies were revealed. This research was designed according to the qualitative research model. In the research, postgraduate theses on Turkish teacher candidates were scanned and the obtained documents were analyzed. As a result of the research, it has been determined that 84 postgraduate theses, 59 of which are postgraduate and 25 are doctoral dissertations, have been written from 2002 to 2022, related to Turkish teacher training and candidates before service. It has been observed that the most theses on the subject were completed in 2019, and these theses were mostly prepared in Gazi, Canakkale Onsekiz Mart and Atatürk Universities in Türkiye. In theses about Turkish teacher training and candidates, writing skills, professional competence, anxiety and attitudes, and self-efficacy perception were the most preferred subjects. In addition, quantitative research models are used more in theses on Turkish teacher training and candidates.
- MakaleAçık Erişim2022Scopus SJRQ3Investigation of biological activities of plant extract and green synthesis silver nanoparticles obtained from Gilaburu (Viburnum opulus L.) fruits
Şahin, Birgütay; Bülbül, Ali Savaş; Çelik, I. Seyfettin; Korkmaz, Nesrin; Karadağ, Ahmet
In this study, biological activities of silver nanoparticles (AgNP) synthesized by green synthesis method using the fruit extract of Gilaburu (Viburnum opulus L.) plant were investigated. The characterization of the synthesized AgNPs was performed by ultraviolet visible region spectroscopy (UV-Vis), Fourier transform - infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) techniques. The crystal size was found to be 52.32 nm when the XRD data were calculated with the Debye-Scherrer's equation. The antimicrobial activities of extract and AgNPs were investigated by microdilution and disk diffusion methods. Antibiofilm activities were examined by the crystal violet technique. The cytotoxic effects of the extract and AgNPs against MCF-7 (human breast cancer) and HUVEC (human umbilical vein endothelial cells) cell lines were evaluated by MTT assay. The IC50 values for the HUVEC line were found to be 0.97 mg/mL (AgNP) and 85.24 mg/mL (extract), while the IC50 values for the MCF-7 line were determined as 0.022 µg/mL (AgNP) and 0.021 µg/mL (extract). To our knowledge, this is the first report to comprehensively examine the biological activities of V. opulus L. extract and biosynthetic AgNPs.
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İncele - MakaleAçık Erişim2022Scopus SJRQ1Eumelanin protects the liver against diethylnitrosamine-induced liver injury
Altındağ, Fikret; Boğokşayan, Seda; Bayram, Sinan
This study aims to evaluate in vivo protective effects of eumelanin (EU) on diethylnitrosamine (DEN)-induced liver injury. Wistar albino male rats were divided into 6 groups (n = 6), Control, DMSO, DEN, DEN + EU10, DEN + EU15, and DEN + EU20. Animals in the DEN group were injected i.p a single dose of 200 mg/kg DEN, DEN + EU10 group was given 10 mg/kg EU, DEN + EU15 group was given 15 mg/kg, DEN + EU20 group was given 20 mg/kg EU for a week. The results showed that there was no significant difference in vessel volume density between the groups. Inflammatory cell infiltration, hydropic degeneration, and necrotic cells were observed in the DEN group, and these histopathological changes were significantly reduced in all treatment groups. Although there was a low intensity of PAS-positive staining in the DEN groups, moderate staining was observed in the treatment groups. While Caspase-3, PCNA, TNF-α, and IL-6 expressions increased in the DEN group, their expressions decreased in the EU-treated groups. DEN increased AST, ALT, and MDA levels and decreased CAT levels. In particular, the EU10 dose significantly improved these parameters. The present study revealed that eumelanin has protective effects against DEN-induced liver injury.
AtıfScopus9WoS8OpenAlex10İncele - MakaleYalnız künye2022Scopus SJRQ2Improvement of corrosion and stress corrosion properties of magnesium alloys by coating aluminum with the electric arc spray method
Catar, Recep; Altun, Hikmet
In this study, corrosion and stress corrosion behaviors of AZ31, AZ61, and AZ91 magnesium alloys coated with aluminum by the electric arc spray method were investigated in 3.5 wt.% NaCl solution. Structural properties of coated materials were investigated by scanning electron microscopy (SEM), energy dispersive X-ray analysis, and X-ray diffraction. Electrochemical properties were determined using the potentiodynamic polarization method in 3.5 wt.% NaCl solution. Potentiodynamic polarization curves showed that corrosion current density values did not change with coating in aluminum-coated samples by the electric arc spray method. In contrast, corrosion potential value increased toward positive values. Slow strain rate test (SSRT) was used to determine the stress corrosion behavior and stress corrosion indexes (ISCC), ultimate tensile strength (UTS), and elongation of AZ31, AZ61, and AZ91 magnesium (Mg) alloys were determined. As a result of the SSRT, the aluminum coating process decreased significantly the stress corrosion indexes of AZ31, AZ61, and AZ91 Mg alloys. The fracture of surface images was also examined in the SEM, and both intergranular and transgranular stress corrosion cracking were observed in all three alloys.
AtıfScopus6WoS5OpenAlex5İncele - MakaleYalnız künye2022Scopus SJRQ1Bioactive compounds of deep eutectic solvents extracts of Hypericum perforatum L.: Polyphenolic- organic acid profile by LC-MS/MS and pharmaceutical activity
Bayram, Sinan; Kutlu, Naciye; Gerçek, Yusuf Can; Çelik, Saffet; Ecem Bayram, Nesrin
Deep eutectic solvents (DESs) are known as environmentally-friendly solvents that have emerged as an alternative to conventional organic solvents in recent years. In this study, the effects of ten different DESs on the extraction of bioactive components from the Hypericum perforatum were investigated. Total phenolic content, total flavonoid content, phenolic profile (32 phenolics), organic acid profile (52 organic acids), as well as antioxidant and antimicrobial activities of H. perforatum extracts prepared using DESs and ultrasonic-assisted extraction method were determined. Total phenolic, total flavonoid content, and antioxidant activities of extracts were determined between 3.10 ± 0.86–16.64 ± 2.09 mg GA/g, 0.02 ± 0.00–12.29 ± 0.30 mg QE/g, and 8.40 ± 0.50–44.78 ± 2.66 mg TE/g, respectively. DES2 (choline chloride:ethylene glycol) and DES7 (choline chloride:lactic acid) demonstrated higher extraction success than other DESs for extracting phenolics and organic acids, respectively. DESs prepared using organic acid as hydrogen bond donor were found to have an antibacterial effect against all bacterial samples. However, the inhibitory effect against yeast-like fungi was observed in a narrower spectrum. Moreover, the results from principal component analysis also confirmed that the type of solvent used for extraction has a significant influence on the phenolics, organic acid, and other parameters. As a result, it was seen that DES components directly affect the extraction efficiency of target compounds from H. perforatum. This is a first and original report about use of DESs in extracting different bioactive components from H. perforatum.
AtıfScopus33WoS31OpenAlex32İncele - MakaleYalnız künye2022Scopus SJRQ1High-speed treatment of low strength domestic wastewater for irrigation water production in pilot-scale classical, moving bed and fixed bed hybrid MBRs
Tuluk, Banu; Yildiz, Ergun; Nuhoglu, Alper; Tataroglu, Numan Suadi; Gulluce, Ekrem; Cengiz, Ibrahim; Degermenci, Nejdet; Angin, Ilker
To evaluate the treatability of domestic wastewater under conditions of low hydraulic retention time and high organic loadings, 3 pilot-scale automatically controlled membrane bioreactors (MBRs) as classical (C-MBR), moving bed (MB-MBR), and fixed bed (FB-MBR) were established and operated for a total of 268 days. Established pilot plants were compared in terms of treatment performance, membrane fouling, irrigation water criteria, and power consumption values. Results obtained have shown that all three systems were able to achieve more than 93% removal of chemical oxygen demand (COD) in an average hydraulic retention time (HRT) of 1 hour, and MB-MBR and FB-MBR were superior in terms of total nitrogen (TN) and total phosphorus (TP) removals. It has been determined that MB-MBR and FB-MBR are also advantageous in terms of power consumption. Especially it has been found that FB-MBR can produce better quality irrigation water with 40% lower power consumption than C-MBR under the same conditions. It was concluded that biofilm-supported hybrid systems could be a practical application in the fight against increasing water scarcity and global warming, both in obtaining clean water with less power consumption and in protecting human and environmental health.
AtıfScopus16WoS11OpenAlex17İncele - MakaleAçık Erişim2022Scopus SJRQ1Recovery of Polyphenols Using Pressurized Hot Water Extraction (PHWE) from Black Rosehip Followed by Encapsulation for Increased Bioaccessibility and Antioxidant Activity
Kasapoğlu, Kadriye Nur; Demircan, Evren; Gültekin-Özgüven, Mine; Kruger, Johanita; Frank, Jan; Arslaner, Ayla; Özçelik, Beraat
In this work, pressurized hot water extraction (PHWE) of hydrophilic polyphenols from black rosehip fruit was maximized using response surface methodology for simultaneous optimization in terms of extraction yield, total antioxidant capacity, total (poly)phenols, catechin, total monomeric anthocyanins, and cyanidin-3-O-glucoside. Extraction parameters, including temperature (X1: 40–80 °C) and the solvent-to-solid ratio (X2: 10–40 mL/g), were investigated as independent variables. Experimentally obtained values were fitted to a second-order polynomial model, and optimal conditions were determined using multiple regression analysis and analysis of variance. The black rosehip extract (BRE) obtained at optimized PHWE conditions was further encapsulated in biopolymer-coated liposomes and spray dried to enhance its processing and digestive stability. After reconstitution, the fabricated particles had an average size of 247–380 nm and a zeta-potential of 15–45 mV. Moreover, encapsulation provided remarkable protection of the phenolics under in vitro gastrointestinal digestion conditions, resulting in up to a 5.6-fold more phenolics in the bioaccessible fraction, which also had 2.9–8.6-fold higher antioxidant activity compared to the nonencapsulated BRE. In conclusion, PHWE in combination with a biopolymer coating is a potent method for the production of stable and safe edible natural extracts for the delivery of (poly)phenolic compounds in food and dietary supplements.
AtıfScopus20WoS19OpenAlex20İncele - MakaleYalnız künye2022Scopus SJRQ3The Importance of Nutrition and a Balanced Diet in the Elderly during the COVID-19 Pandemic
Esgin, Özge; Erten, Tayyibe
Background: Age is an important risk factor for the mortality rate in the COVID-19 disease, and mostly, hospitalised patients over 60 years with chronic diseases are at high risk of death due to this disease. Along with preventive measures, proper nutrient intake might be helpful in maintaining a healthy state or reduce the severity of the COVID-19 disease in the elderly. Methods: The search was carried out in the PubMed, Scopus, Medline, Google Scholar and Web of Science using the following terms: COVID-19, coronavirus, elderly, elderly nutrition. Results: The requirement for some macro and micronutrients, especially the nutrients that support the immune activity, increases in this disease. During the pandemic, the daily energy requirement for the elderly is 27-30 kcal/kg, while the protein intake is at least 1g/kg, and the ratio of fat and carbohydrate is 30:70 or less than 50:50. The daily intake of vitamin A, B6, B12, C, D, zinc and selenium can also be increased due to their supporting function in the immune system. Probiotics include Bifidobacterium longum MM-2, Lactobacillus plantarum 06CC2, Lactobacillus bulgaricus OLL1073R-1 and Lactobacillus rhamnosus M21, and the consumption of prebiotics in diet enhances the immune function. Additionally, flavonoids, such as baicalin, epigallocatechin gallate, gallocatechin gallate, kaempferol, luteolin, resveratrol and quercetin, improve immunity by reducing oxidative stress in the elderly. Conclusion: Adequate and balanced nutrition diet should be applied during the pandemic; in addition to this, micronutrient deficiencies should also be overcome in the elderly at every stage of life. Nuron&The novel coronavirus, called SARS-CoV2 (Severe Acute Respiratory Syndrome CoronaVirus-2), emerged at the end of 2019 in China and was announced as a global pandemic by the World Health Organisation (WHO) on March 11th, 2020 [1]. It has spread more rapidly than previous coronavirus outbreaks, such as SARS-CoV and MERS-CoV (Middle East respiratory syndrome coronavirus); thus, it has affected most countries [2, 3]. By August 2021, WHO reported globally 206.958.371 confirmed cases of COVID-19, including 4.357.179 deaths [4]. Since SARS-CoV-2 enters the cells through angiotensin-converting enzyme 2 (ACE2), it binds to the ACE2 membrane of alveolar epithelial cells and attacks firstly the respiratory system [5].
AtıfScopus1WoS1OpenAlex1İncele - Kitap BölümüYalnız künye2022Diplomatic transformation of series narrative: Velvet evolution of representation from valley of the wolves to valley of the wolves-ambush
Keskin, Savaş
In addition to what the studies on the discourse and character modeling of the Valley of the Wolves series say, this chapter argues that there has been a Neo-Ottomanization and religiosity evolution in terms of the discourse and the hero's semiosis. The thesis of this section is that Valley of the Wolves series has evolved in terms of narrative and character since it began to appeal to international target audiences. It is the main assumption of the section that there is a parallel transformation with the public diplomacy practices of the Republic of Turkiye in the process following the fact that the audience groups, especially in Arab geography, Afghanistan and Pakistan, where Islamic influence is dominant, become fans of the Valley of the Wolves. In this section, it is aimed to explain the velvet evolution, which exemplifies the transition from the Republican ideology to the Neo-Ottoman ideology in diplomatic media narratives, through the historical rupture of the Valley of the Wolves.
AtıfScopus1İncele - MakaleYayıncıda açık erişim2022Scopus SJRQ1Time-dependent fresh properties characterization of 3D printing engineered cementitious composites (3DP-ECC): On the evaluation of buildability
Zhou, Wen; McGee, Wes; Zhu, He; Gökçe, H. Süleyman; Li, Victor C.
Failure of the structure due to poor buildability is a major concern in 3D printing of cementitious materials. Evaluation of buildability based on fresh material properties and print parameters is of significance. In this paper, the buildability of printable engineered cementitious composites was investigated and quantified at the material and the structural scale. Fresh ECC material showed excellent load capacity and deformation resistance at the material scale, therefore preventing material failure of the bottom layers, as confirmed by constant shear rate tests and incremental loading tests. To predict vertical deformation of a 3DP structure, a time-dependent strain-stress model of printable ECC was proposed and validated based on the green strength evolution of the material and the buildup rate of the designed structure. At the structural scale, the approach of predicting critical height at self-buckling failure based on stiffness evolution was validated by printing a straight wall and a cylinder structure.
AtıfScopus56WoS46OpenAlex52İncele