Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleYalnız künye2026Scopus SJRQ2Microwave-assisted extraction of pectin from persimmon: physicochemical properties, structural characterization and greenness assessment
Yılmaz, Özlem; Kutlu, Naciye; Kamiloğlu, Aybike; Elbir Abca, Tuğba
In this study, the microwave-assisted extraction (MAE) of pectin from persimmon was optimized using a Box-Behnken experimental design, with pH, extraction time, and liquid-to-solid ratio as independent variables. The optimization results obtained through response surface methodology indicated optimum conditions of pH 1.78, extraction time of 8 min, and a liquid-to-solid ratio of 125 mL/g, corresponding to a predicted pectin yield of 4.28%. In the validation experiment, the actual pectin yield was determined to be 3.79 ± 0.04%, confirming a good agreement with the model predictions. The degree of esterification, methoxyl content, galacturonic acid and ash contents, water- and oil-holding capacities, antioxidant activity, rheological behavior, and structural properties (FT-IR, DSC, and 1H NMR) of the samples obtained under optimal MAE and conventional extraction conditions were compared. Based on the degree of esterification, both samples were classified as high-methoxyl, with galacturonic acid contents of 41% and 42% for the MAE and conventionally extracted samples, respectively; both values were below the ≥ 65% level specified for commercial food-grade pectin. The ash content was higher in the MAE sample (7.22%) than in the conventionally extracted sample (1.56%). MAE resulted in a pectin-rich complex with a relatively low galacturonic acid content and higher antioxidant activity than the conventionally extracted sample. Furthermore, the MAE sample exhibited higher water-holding capacity but lower oil-binding capacity than the conventionally extracted sample. Rheological analysis showed that the MAE sample exhibited higher apparent viscosity and shear stress than the conventionally extracted sample. FT-IR analysis revealed more pronounced absorption bands in the MAE sample, suggesting structural differences. DSC analysis revealed differences in the thermal behavior of the MAE and conventionally extracted samples. Additionally, 1H NMR analysis supported the presence of characteristic pectic structural features in both samples. The greenness assessment of the method was assessed using the Greenness Evaluation Metric for Analytical Methods (GEMAM), which yielded an overall score of 7.482, indicating a high level of environmental acceptability. Overall, MAE can be considered an efficient and sustainable approach for obtaining a pectin-rich complex with antioxidant activity from persimmon.
- MakaleAçık Erişim2026Scopus SJRQ1Influence of Salt Type on the Physicochemical, Microbiological, Sensory Properties, Mineral, Free Fatty Acid, and Volatile Composition of PDO Erzincan Tulum Cheese
Arslaner, Ayla; Yılmaz, Özlem
This study evaluated the quality attributes of Protected Designation of Origin (PDO) Erzincan Tulum cheese by comparing control cheeses made with Kemah spring salt (KS) to those made with Sivas spring salt (SS), Çankırı rock salt (CS), and a low-sodium salt (rock salt–KCl blend, 50:50, LNaS). Cheeses were ripened at −2 to 0 °C for 120 days. Analyses included chemical composition, mineral profile, proteolysis, lipolysis, fatty acid composition, volatile compounds, and sensory properties. During ripening, dry matter and pH increased significantly (p < 0.05). Mineral content varied by salt type: LNaS had higher potassium and lower sodium, KS-C had the highest sodium and phosphorus, and SS-C the highest magnesium (p < 0.05). Proteolysis increased in all samples, with the highest levels in LNaS (p < 0.05). Lipolysis increased in all samples (p < 0.05), with CS-C showing the highest free fatty acid (FFA) content. Fifty volatile compounds were identified; carbonyl compounds were highest in LNaS-C and esters were highest in SS-C. Sensory evaluation showed that CS-C had the highest overall acceptability score and SS-C the lowest (p < 0.05). CS-C outperformed the control in sensory quality, and LNaS-C achieved similar sensory acceptance without compromising quality. Salt content and type were identified as critical factors in determining the authenticity of PDO Erzincan Tulum cheese.
AtıfWoS1OpenAlex1
İncele - MakaleYalnız künye2025Scopus SJRQ1Extraction of Bioactive Compounds from Celery Root Peels Using an Ultrasound-Assisted Method with Choline Chloride–Based Deep Eutectic Solvents
Kamiloğlu, Aybike; Kutlu, Naciye; Elbir Abca, Tuğba; Yılmaz, Özlem
The concepts of sustainable and green technology have come to the forefront due to problems such as increasing environmental pollution, depletion of resources, and uncontrolled increases in industrialization. Green chemistry aims to reduce or completely eliminate pollution in the environment. In this study, both the ultrasonic method, which is a form of green technology, and deep eutectic solvents, which are among green solvents, were used, and a perspective on creating economic value from a waste product (celery root peel) is presented. In this context, phytochemical compounds (total flavonoid content and antioxidant activities) were obtained from celery root peels by ultrasonic-assisted extraction using 10 different choline chloride–based deep eutectic solvents, and the results were compared with methanol, an organic solvent. As a result, according to the total flavonoid content, the most effective deep eutectic solvent was choline chloride to sucrose, while according to the antioxidant activity value, choline chloride to lactic acid was found to be effective. For all of the analyzed bioactive compounds, higher or equal yields were obtained with all deep eutectic solvent extracts compared to methanol, and deep eutectic solvents could be alternatives to organic solvents (such as methanol) that may have toxic effects on humans or the environment.
AtıfScopus9WoS9OpenAlex10İncele - MakaleAçık Erişim2025Scopus SJRQ1The Effects of Essential Oils from Coriander Seed, Tarragon and Orange Peel on Lipid Production by Yarrowia lipolytica Strains
Yılmaz, Özlem; Kaban, Güzin; Kaya, Mükerrem
The aim of the study was to investigate the effects of different concentrations (0.15, 0.30, and 0.45 mL/L) of essential oils from coriander seeds (Coriandrum sativum), tarragon (Artemisia dracunculus), and orange peels (Citrus sinensis) on biomass, lipid content, and lipid yield of the strains Yarrowia lipolytica Y-1094, Y. lipolytica YB 423, and Y. lipolytica IFP29. The fatty acid composition of the oils produced by the strains was also determined. The highest biomass (5.38 ± 1.80 g/L) and lipid production (0.98 ± 0.42 g/L) were observed in the presence of Y. lipolytica IFP29 and Y. lipolytica YB 423, respectively. The lipid yield showed the highest value at the level of 0.45 mL/L in the presence of the Y. lipolytica Y-1094 strain. The correlation heat map results indicate that 0.45 mL of tarragon affected biomass and lipid content more than the other essential oils used. Y. lipolytica Y-1094 produced higher levels in terms of myristic acid and palmitic acid in all three essential oil sources than the other strains. The highest oleic acid level of all strains was determined in coriander seed essential oil, and the lowest in tarragon essential oil. The oleic acid level of Y. lipolytica Y-1094 was lower than that of the other two strains in all essential oils. Regarding linoleic acid, the oil level did not have a significant effect in the presence of tarragon and orange peel.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2022Effect of Different Roasting Methods on Some Properties of Walnut Kernels
Kantar, Naciye Kutlu; Kamiloğlu, Aybike; Yılmaz, Özlem; Elbir, Tugba
In this study, the effects of oven roasting and microwave roasting on some properties of walnut kernels were determined. Roasting methods at different oven temperatures (70, 100, and 130 ºC for one hour) and at different microwave powers (240, 535 and 830 W for 5 min) were applied to samples. Moisture ratio values, total phenolic compound, antioxidant activity, and oil yield of the roasted and unroasted products were discussed. The highest oil yield was determined in the high temperature oven roasting but the microwave roasting mostly increased the oil yield of the product. Microwave roasting was found to be more suitable for decreasing moisture content. The lowest antioxidant activity was detected with microwave roasting. It was determined that the effect on the amount of phenolic substance in the two methods was indifferent.
AtıfOpenAlex2
İncele - MakaleAçık Erişim2022Attitudes and Behaviors of Turkish Consumers Regarding the Olive Oil Consumption
Özçelik, Beraat; Altuntaş, Ümit; Güzel, İsmail; Yılmaz, Özlem; Uluata, Sibel
Bu çalışmanın amacı, Türk tüketicilerinin Akdeniz diyetinin önemli bir parçası olan zeytinyağı tüketimine ilişkin tutum ve davranışlarını ortaya koymak, zeytinyağının duyusal özelliklerinin tüketiciler üzerindeki etkisini ölçmek ve bu konudaki farkındalıklarını ve tutumlarını belirlemektir. Literatür araştırması doğrultusunda, tüketicilerin zeytinyağı tercihinde en çok önem verdiği özellikler ve zeytinyağı satın alma/tüketim sıklığı Türkiye'de sıklıkla mutfaklarda kullanılan zeytinyağının önemi ve mevcut durumu göz önünde bulundurularak, tüketicilerin zeytinyağı tercihinde etkili olan parametreleri değerlendirmek için incelenmiştir. Zeytinyağı tüketim ve satın alma sıklığı, ambalaj tercihi, duyusal özelliklerin önemi gibi anket soruları hazırlanmış ve anket çalışması tasarlanmıştır. Bu anket çalışmasında tüketicilerin demografik ve sosyo-ekonomik yapıları da dikkate alınmış ve elde edilen verilerin demografik özelliklerine (cinsiyet, yaş, eğitim, gelir düzeyi) göre farklılık gösterip göstermediği istatistiksel olarak tespit edilmiştir. Belirlenen tasarım doğrultusunda "VETİ" programı ile hazırlanan anket Türkiye'de yaşayan 272 kişiye uygulanmıştır. Anketin istatistiksel analizi SPSS paket programı ile gerçekleştirilmiş, verilerin analizinde frekans dağılımı ve Ki kare Öz Bu çalışmanın amacı, Türk tüketicilerinin Akdeniz diyetinin önemli bir parçası olan zeytinyağı tüketimine ilişkin tutum ve davranışlarını ortaya koymak, zeytinyağının duyusal özelliklerinin tüketiciler üzerindeki etkisini ölçmek ve bu konudaki farkındalıklarını ve tutumlarını belirlemektir. Literatür araştırması doğrultusunda, tüketicilerin zeytinyağı tercihinde en çok önem verdiği özellikler ve zeytinyağı satın alma/tüketim sıklığı Türkiye'de sıklıkla mutfaklarda kullanılan zeytinyağının önemi ve mevcut durumu göz önünde bulundurularak, tüketicilerin zeytinyağı tercihinde etkili olan parametreleri değerlendirmek için incelenmiştir. Zeytinyağı tüketim ve satın alma sıklığı, ambalaj tercihi, duyusal özelliklerin önemi gibi anket soruları hazırlanmış ve anket çalışması tasarlanmıştır. Bu anket çalışmasında tüketicilerin demografik ve sosyo-ekonomik yapıları da dikkate alınmış ve elde edilen verilerin demografik özelliklerine (cinsiyet, yaş, eğitim, gelir düzeyi) göre farklılık gösterip göstermediği istatistiksel olarak tespit edilmiştir. Belirlenen tasarım doğrultusunda "VETİ" programı ile hazırlanan anket Türkiye'de yaşayan 272 kişiye uygulanmıştır. Anketin istatistiksel analizi SPSS paket programı ile gerçekleştirilmiş, verilerin analizinde frekans dağılımı ve Ki kare testleri kullanılmıştır. Bu anket çalışması sonucunda, Türk tüketicilerin kendilerine yöneltilen sorulara verdikleri yanıtlara göre, incelenen demografik değişkenlere, "cinsiyet", "yaş" ve "eğitim durumu" ve "gelir düzeyi"ne göre istatistiksel farklılıklar bulunmaktadır.
AtıfOpenAlex2TR Dizin2İncele