Akçalı, Çağlar
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Doktor Öğretim Üyesi
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akcalicaglar@gmail.com
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Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
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17
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5
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6
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10
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16
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8
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15
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3
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9
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14
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1
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4
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7
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11
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12
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66
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121
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6.00
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| Journal | Count |
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| International Journal of Environmental Analytical Chemistry | 2 |
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| Materials Horizons: From Nature to Nanomaterials | 1 |
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Now showing 1 - 10 of 11
Article Citation - WoS: 22Citation - Scopus: 25Determination of Antimicrobial and Toxic Metal Removal Activities of Plant-Based Synthesized (capsicum Annuum L. Leaves), Ecofriendly, Gold Nanomaterials(Wiley-v C H verlag Gmbh, 2020) Baran, Mehmet Firat; Acay, Hilal; Keskin, CumaliNanoparticles are valuable materials with widespread use. The fact that these materials are obtained by biological resources with an environmentally friendly method contributes to the development of studies in this field. Gold nanoparticles (AuNPs) from waste vegetable sources (green leaves of Capsicum annum L.) are economically and easily synthesized. The obtained particles are characterized by UV-vis spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) analysis. The antimicrobial activity of the particles on the pathogenic microorganisms Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 29213, Bacillus subtilis bacteria, and Candida albicans yeast are found to have a significant suppressive effect. The removal activities of eight toxic metals (Pd, Cd, Fe, Ni, Co, Mn, Zn, Pb) in Diyarbakir drinking water and artificially prepared water within different pHs are investigated. Gold nanoparticles synthesized from Capsicum annuum L. leaves are found to be effective in toxic metal removal in water samples.Article Citation - Scopus: 23Methylene Blue and Malachite Green Dyes Adsorption Onto Russula Delica/Bentonite(Elsevier Ltd, 2025) Yildirim, A.; Acay, H.In the current research Russula delica mushroom/bentonite clay (RDBNC) as a low-cost bionanosorbent was investigated for adsorption of methylene blue (MB) and malachite green (MG) dye from contaminated water. The bionanosorbent was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (FESEM), Thermal Gravimetric Analysis (TGA), and Zeta-potential techniques. Adsorption experiments of RDBNC for MB, MG dyes following Freundlich isotherm and pseudo second order kinetic models. To determine their effects on the adsorption efficiency, the adsorption parameters were investigated including dye concentration, contact time, temperature, and dosage of the bionanosorbent. The adsorption process can operate through three primary mechanisms: the π–π interaction, the hydrogen bonding, and electrostatic interactions between the surface of RDBNC and MB, MG dyes. Desorption results revealed that MB and MG dyes were effectively desorbed during the fourth cycle without a notable loss in adsorption capacity. The thermodynamics parameters including ΔH, ΔS, and ΔG, were determined, and the adsorption process was favorable, spontaneous, and exothermic for MB and MG. The results showed that RDBNC, which showed effective inhibition at low concentrations, especially against E. coli, can be used as a low-cost bionanosorbent synthesised for the first time to remove industrial dyes. © 2024 The AuthorsArticle Citation - WoS: 12Citation - Scopus: 13Synthesis and Characterisation of Mushroom-Based Nanocomposite and Its Efficiency on Dye Biosorption Via Antimicrobial Activity(Taylor & Francis Ltd, 2022) Yildirim, Ayfer; Acay, Hilal; Baran, FiratMushrooms are highly effective for biotechnological products and economically. Mushroom-based nanocomposites occasionally used in recent studies. Pleurotus ostreatus (PO) from southeast Turkey that used in our work is the most commonly present cultivated white-rot edible fungus all around the world. Until now, no report is existing on the biosorption study of Reactive orange 16 (RO16) with mushroom-based nanocomposite. Therefore, the main goal of this work was to synthesise Pleurotus ostreatus-based-chitosan (POCN) nanocomposite and characterise via Fourier transform infrared spectrophotometer, Differential scanning calorimetry, Field-emission scanning electron microscopy, Brunauer-Emmett-teller, and X-ray diffraction techniques; investigate the antimicrobial activity and adsorption behaviour for removal of RO16 dye. The adsorption of RO16 by batch technique was evaluated with pH, initial dye concentration and temperature effect. Point of zero charge was evaluated. The adsorption of dye followed by the pseudo-second-order kinetic model and data of equilibrium was well fitted with the Langmuir isotherm model. The maximum adsorption capacity of POCN for RO16 was found as 65.5 mg/g (initial dye concentration: 100 mg/g, temperature: 298 K). Besides, POCN was researched for antimicrobial activity against some pathogens such as Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 25923, Bacillus subtilis ATCC 11774 standard bacterial strains and Candida albicans ATCC 10231 fungal strain by using microdilution method on the Minimum Inhibiting Concentration (MIC). Furthermore, during four cycles of adsorption and desorption, regeneration experiment revealed good reusability of POCN nanocomposite with 0.1 M HCl as a desorbing agent.Book Part Citation - Scopus: 9Applications of Biodegradable Green Composites(Springer Nature, 2021) Yildirim, A.; Acay, H.Materials called biodegradable green composites consisting of matrices and reinforcers made entirely from natural resources are macro-, micro-, or nano-sized materials that can fulfill desired mechanical and thermal properties as well as being light. Producing natural polymers with good mechanical properties and thermal stability has attracted the attention of many researchers. The use of this material through a variety of mixtures and composites has become more and more popular as raw materials are limited and there is more concern about greener material that is environmentally friendly. Therefore, materials made from renewable sources such as biocompatible/biodegradable polymers can dominate the future by replacing the petroleum raw material. However, more efforts are needed to achieve better properties of the renewable polymer blend and composites and also to address the deficiencies of this new material. To do this, a basic understanding of renewable material types, structures, properties, and potential applications as needed. The study covers the application areas of biodegradable green composites. The stated application areas can be literature support for the rapid development of biodegradable composites at the request of researchers, manufacturers, and consumers for environmentally friendly products. © 2021, Springer Nature Singapore Pte Ltd.Master Thesis Sağlık Çalışanlarında Akdeniz Diyetine Uyum, Sürdürülebilir Gıda Okuryazarlığı ve Depresyon Arasındaki İlişkinin Değerlendirilmesi(2025) Örnek, Nesrin Özmen; Akçalı, ÇağlarGiriş: Akdeniz Diyeti (AD), fiziksel ve zihinsel sağlık üzerinde olumlu etkiler sağlarken; sürdürülebilir beslenme okuryazarlığı, çevreye duyarlı ve sağlık bilincine sahip beslenme davranışlarını desteklemektedir. Sağlık profesyonelleri ise toplumsal rollerinden dolayı hem AD'ye uyumu hem de sürdürülebilir beslenme davranışlarını teşvik etmede önemli bir gruptur. Amaç: Bu çalışma, sağlık çalışanları arasında AD'ye uyum, sürdürülebilir beslenme okuryazarlığı ve depresyon düzeyleri arasındaki ilişkileri incelemek ve bunların demografik ve yaşam tarzı faktörleriyle olan bağlantılarını araştırmayı amaçlamıştır. Yöntem: Bu çalışma, 251 sağlık çalışanı ile kesitsel, nicel desen olarak yapılmıştır. Verilerin toplanması yüz yüze görüşme yöntemi ile gerçekleştirilmiş olup, katılımcılara AD'ye Uyum Tarama Testi (MEDAS), Sürdürülebilir Beslenme Okuryazarlığı Ölçeği ve Beck Depresyon Ölçeği uygulanmıştır. İstatistiksel analizler korelasyon ve regresyon modellerini içermektedir. Bulgular: Erkeklere göre kadınlar sürdürülebilir beslenme okuryazarlığı alt boyutunda daha yüksek puana sahiptir. Sigara içmeyenler AD'ye daha fazla bağlılık gösterirken, kronik hastalığı olan bireyler daha yüksek depresyon puanları almıştır. Depresyon düzeyi minimum olan katılımcılar, şiddetli depresyon olanlara göre MEDAS puanlarında önemli ölçüde daha yüksek puana sahiptir. MEDAS puanları, sürdürülebilir beslenme okuryazarlığı ile pozitif, beden kütle indeksi ile negatif korelasyon göstermiştir. Regresyon analizi, depresyonun hem MEDAS puanını hem de sürdürülebilir beslenme okuryazarlığı puanını olumsuz yönde görülmüştür. Sonuç: Bulgular, sağlık çalışanlarında AD'ye uyum düzeyi ile sürdürülebilir beslenme okuryazarlığının yükselmesinin depresyon puanlarının azalmasıyla ilişkili olduğunu göstermektedir. Bu doğrultuda, beslenme okuryazarlığını artırmaya yönelik eğitim programlarının ve AD'nin teşvik edilmesinin yalnızca sürdürülebilir beslenme alışkanlıklarını güçlendirmekle kalmayıp aynı zamanda psikolojik iyilik hâlini de destekleyebileceği sonucuna ulaşılmıştır. Gelecekteki araştırmalar, farklı meslek gruplarında bu tür müdahalelerin etkililiğini değerlendirerek daha geniş kanıtlar sunmalıdır. Anahtar Kelimeler: Akdeniz Diyeti, Sürdürülebilir Gıda Okuryazarlığı, Depresyon, Sağlık Profesyonelleri, Beslenme DavranışıArticle Citation - WoS: 14Citation - Scopus: 25Biosynthesis and Characterization of Silver Nanoparticles Using King Oyster (pleurotus Eryngii) Extract: Effect on Some Microorganisms(Corvinus Univ Budapest, 2019) Acay, H.; Baran, M. F.The integration of the principles of green chemistry into nanotechnology has become one of the key issues in nanotechnology research. Metal nanoparticle production, which does not contain toxic chemicals and does not harm the environment, needs to be developed to avoid adverse effects on medical applications. In this study, Pleurotus eryngii (PE) extract was used for preparation of silver nanoparticles (AgNPs). The presence of AgNP was understood that after adding 1 mM silver nitrate (AgNO3) to the fungus extract, the reaction turned from the open yellow to reddish brown. The analysis of samples taken at different times with the UV-Visible Spectrophotometer (UV-Vis) confirms the formation of PE-AgNPs. The Scanning electron microscopy-Energy Dispersive X-Ray Spectrum (SEM-EDX) analysis showed that spherical nanoparticles were formed. X-ray crystallography (XRD), analysis is calculated from Debye-Sherers inequality, in which PE-AgNP synthesized in the study was 18.45 nm in size. It has been demonstrated by using the minimum Inhibitory Concentration (MX) method in which AgNPs have strong antimicrobial activity.Article Citation - WoS: 1Citation - Scopus: 1Effect of pleurotus Ostreatus Water Extract Consumption on Blood Parameters and Cytokine Values in Healthy Volunteers(Routledge Journals, Taylor & Francis Ltd, 2024) Dundar, Abdurrahman; Yalcin, Pinar; Arslan, Nurgul; Acay, Hilal; Hatipoglu, Abdulkerim; Boga, Mehmet; Yaprak, BulentObjective: Our aim in this study is, does 29-day regular consumption of Pleurotus ostreatus water extract by volunteer individuals who meet the study criteria have an effect on blood and cytokine values? Method: In accordance with the purpose of the study, volunteers were asked to consume 100 ml of the extract every morning for 29 days. Three tubes of blood samples were taken from the volunteers on the 15th and 29th days of the study. Biochemical and hematological analysis of the blood samples were performed and immunomodulatory effects through cytokines were examined. The values obtained from 3 tubes of blood obtained from volunteers before the use of mushroom extract were used as control. The chemical composition and beta-glucan content of 100 ml of mushroom water extract were also analyzed. Result: IL-4, IL-6, IL-10 and IL-13 could not be detected because the values were below the lowest standard value. TNF-alpha, IFN-gamma and IL-1 beta 15th and 29th day values decreased compared to the 1st day (control) values (p < 0.05). However, there was no significant difference observed between the 15th and 29th day. No abnormalities were observed in biochemical and hematological values. Also, the beta-glucan content of extract was found 38.12 mg/100 ml. Conclusion: The frequency range of kidney and liver function test results confirmed that P. osreatus is a reliable food source. Considering the cytokine values these results indicate that P. ostreatus water extract has an anti-inflammatory effect. As no significant difference was observed in 29 days of use, it is thought that 15 days of daily consumption of the extract may be sufficient for the anti-inflammatory effect to occur. However, a large number of qualified clinical trials are needed to support the issue.Article Citation - WoS: 8Citation - Scopus: 8Biosynthesis and Characterization of Silver Nanoparticles Using Fig (ficus Carica) Leaves: a Potential Antimicrobial Activity(Corvinus Univ Budapest, 2019) Acay, H.Environmentally friendly methods for obtaining nanomaterials see a great interest. In addition to being inexpensive, the easy implementation process and the advantages of synthesis without toxic chemicals are the main reasons of interest. In this study, silver nanoparticles (AgNPs) were successfully synthesized using fig (Ficus carica) leaf extract. The formation and the presence of AgNPs were observed using ultraviolet-visible spectrophotometry (UV-Vis). Peaks with a maximum wavelength of 419 nm are identified in the measurements. Phytochemicals in the extract responsible for functional groups providing reduction and stability were evaluated using Fourier transform infrared spectroscopy (FT-IR) data. The Scanning electron microscopy-Energy Dispersive X-Ray Spectrum (SEM-EDX) analysis showed that the AgNPs were spherical and the elemental composition contained mostly silver. X-ray diffractometer (XRD) results revealed that the peaks 111 degrees, 200 degrees, 220 degrees and 311 degrees belong to the characteristic structure of silver and have a crystal dimension of 17.30 Nm using Debye-Scherrer equation. In thermogravimetric - differential thermal analysis (TGA-DTA) analysis, the degradation temperatures of AgNPs were evaluated. AgNPs showed antimicrobial activity on various microorganisms even at very high concentrations. As a solution to the antimicrobial search, it can be developed in medical industry.Article Citation - WoS: 6Citation - Scopus: 9Adsorption Performance of bacillus Licheniformis Sp. Bacteria Isolated From the Soil of the Tigris River on Mercury in Aqueous Solutions(Taylor & Francis Ltd, 2022) Baran, M. Firat; Yildirim, Ayfer; Acay, Hilal; Keskin, Cumali; Aygun, HusamettinMercury is known to be one of the most toxic heavy metals in the environment and is released into the water systems in significant quantities through natural events and industrial process activities. Many chemical materials are used as adsorbents in the removal of toxic metals from the environment and wastewaters. However, using microorganisms as bio-sorbents instead of chemical materials has become common recently due to their low cost, easy availability and presence in nature. In this study, Bacillus licheniformis in the soil isolated from the Tigris River was used as bio-sorbent. The mercury (Hg(II)) absorption behaviour of Bacillus licheniformis bacteria (BLB) was investigated using inductively coupled plasma mass spectrometry. The effects of equilibrium of adsorption time, temperature, adsorbent dosage and pH on the adsorption of Hg (II) onto BLB were determined. The maximum adsorption capacity of Hg (II) onto BLB was determined as 82.12 mg/g (T = 25 degrees C, pH 5, Co = 50 mg/L, m = 25 mg). The BLB was characterised using Fourier transform infrared spectroscopy analysis, thermal gravimetric analysis/differential thermal analysis, scanning electron microscopy analysis and energy-dispersive X-ray spectroscopy analysis. In addition, pseudo-first-order and pseudo-second-order kinetic models were applied. The equilibrium data for the adsorption of Hg(II) onto BLB were examined by the Langmuir and Freundlich isotherm models. The activation energy was calculated using the pseudo-second-order rate constant. These results suggested the BLB can be used as an efficient adsorbent for the removal of Hg(II) metal ions from wastewater. When the results of bio-sorption studies were examined, it was found that the bio-sorbent could be reused easily. The present study suggests that microorganism bio-sorbents are useful for the efficient removal of mercury from aqueous solutions.Book Part Mardin Yemek Kültürünün Beslenme ve Sağlık Açısından Değerlendirilmesi(Mardin Artuklu Üniversitesi, 2023) Toprak Döşlü, Serap; Akçalı, Çağlar; Aslan Ceylan, Jiyana) Amaç: Bu bölümün amacı, Mardin yemek kültürü ile kronik sağlık problemleri arasında bir ilişki olup olmadığını tespit etmektir. b) Bulgular: Mardin yemek kültüründe protein ve karbonhidrat çok geniş yer tutmaktadır. Vitamin ve mineral içeren ve lifli yiyecekler ise yeterince alınmamaktadır. Bu nedenle beslenmeye bağlı pek çok sağlık problemi ortaya çıkmaktadır. c) Teklifler: Akademisyenler, hekimler ve diyetisyenler iş birliği hâlinde yerel halka farkındalık eğitimleri vermelidirler. Öğünlerde kırmızı et tüketiminin azaltılması, zeytinyağı kullanımının teşvik edilmesi, doğru pişirme yöntemlerinin tercih edilmesi ve sağlıklı beslenmenin artırılması için yemek/beslenme kursları ve bilinçlendirme toplantıları düzenlenmelidir. Ayrıca, sağlığın ve beslenmenin birbiriyle paralel ilerlediğini vurgulayan önleyici sağlık saha çalışmaları yapılmalıdır.
