Sürdürülebilir Kalkınma Amaçları

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• MakaleYalnız künye2026Scopus SJRQ1/r/bayburt/11329
  Optimization of Antioxidant Recovery from Deep Eutectic Solvent Phase via Back-Extraction Using Taguchi Method

  Kamiloğlu, Aybike; Elbir Abca, Tuğba; Kutlu, Naciye

  This study investigates the use of deep eutectic solvents (DESs) via ethyl acetate-mediated liquid–liquid extraction and the optimization of the process using the Taguchi method for the recovery of antioxidant compounds from tea industry waste. In the study, choline chloride was used as a hydrogen bond acceptor; lactic acid, glycerol, and ethanol were used as hydrogen bond donors; and different ratios of water (10–30%) were added to reduce the viscosity of the DESs. Ultrasound-assisted extraction results showed that lactic acid-based DESs provided the highest total phenolic content and antioxidant activity due to their ability to break down plant cell walls. However, in the recovery phase carried out with ethyl acetate, it was determined that ethanol-based DESs (ChCl:EtOH) were more effective in transferring antioxidants to the organic phase due to their looser molecular structure. Optimization using the Taguchi L9 orthogonal array revealed the following results: ChCl:EtOH solvent, 2:1 ethyl acetate/extract ratio, 20% water ratio, and 30-min shaking period were determined as the optimal conditions. Under these conditions, the model predicted a yield of 93.34%, and experimental validation revealed a recovery yield of 85.70 ± 1.13%. The results demonstrate that this developed green extraction method offers a sustainable alternative for converting tea waste into high value-added functional components.

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• MakaleYalnız künye2026Scopus SJRQ1/r/bayburt/10945
  The Use of Iron-Cobalt Sulphide Electrodes Decorated with Silver Nanoparticles as a Sensitive and Selective Sensor for Nitrite Determination in Different Meat Products

  Anlar Daldal, Pınar; Öztürk Doğan, Hülya; Cinar Topcu, Kübra

  In this study, silver nanoparticle-decorated iron cobalt sulphide (Ag@FeCoS₂) nanostructures were synthesized on the surface of a pencil graphite electrode (PGE). The resulting modified electrode obtained was used to determine the nitrite content in four different meat products (pastırma, bologna-type sausage, heat-treated sucuk, and ham) sourced from the same brand and widely consumed in the Turkish market. The fabricated Ag@FeCoS₂ electrode demonstrated high performance in amperometric nitrite detection, with a linear detection range (0.1 to 2.5 mM), high sensitivity (1759 μA mmol/L), and a low detection limit (0.29 μmol/L). The nitrite results obtained by the electrochemical method showed recoveries ranging from 99.3% to 102.5% compared with the spectrophotometric method. In addition, the physicochemical properties of the meat products, including pH, moisture, protein, fat, and ash contents, were characterized as complementary information on the real food matrices analyzed. Statistically significant differences were observed among the investigated products for these parameters. Overall, the developed Ag@FeCoS₂/PGE sensor provides a practical, accurate, and reliable analytical approach for nitrite determination in processed meat products.

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• Derleme MakaleAçık Erişim2025Scopus SJRQ1/r/bayburt/10843
  Evaluation of the Effect of Sustainable Drying Techniques and Intensification Technologies on Color Profile of Dehydrated Fruits and Vegetables

  Süfer, Ozge; Koç, Gulsah Caliskan; Öztekin, Sebahat; Karabacak, Azime Ozkan; Su, Dianbin; Wang, Deqing; Eroglu, Salih; Malçok, Senanur Durgut; Uslu, Ulku Hilal; Adal, Samiye

  This research investigates the effects of various drying procedures and intensification technologies on the color profile of dried fruits and vegetables. The primary goal is to identify the most effective techniques for minimizing degradation, which is frequently caused by exposure to heat, oxygen, and longer drying durations, while retaining the original color of these products. Although conventional techniques like sun and hot air drying are often employed, enzymatic and non-enzymatic brownings usually cause a considerable loss of color. New technologies aim to better preserve the original color by cutting down on processing temperature and drying time. The paper also looks at the possibilities of hybrid drying approaches, which combine techniques such as infrared hot air drying and microwave hot air drying. These methods have been demonstrated to be especially successful in preserving color integrity and enhancing drying process effectiveness. The results highlight the vital significance that parameter optimization and drying technique selection play in maintaining the nutritional value and aesthetic appeal of dehydrated fruits and vegetables. This study emphasizes the significance of developing drying technologies to satisfy consumer desires for premium, aesthetically pleasing food goods, because color is a major factor in determining consumer acceptance and perceived product quality. With wider implications for food preservation and the food industry overall, this work helps to develop more effective and efficient drying processes by shedding light on how various drying techniques affect color retention.

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  AtıfScopus26·WoS27·OpenAlex24

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• MakaleYalnız künye2025Scopus SJRQ1/r/bayburt/11142
  Extraction 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.

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  AtıfScopus9·WoS9·OpenAlex10

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• MakaleAçık Erişim2025Scopus SJRQ1/r/bayburt/10931
  Electrospinning Encapsulation of Chlorophylls Microwave-Extracted from Spinach Waste and Utilization as Coloring Agent in Yogurt

  Isik, Beyza Sukran; Bayram, Sinan; Altay, Filiz

  Natural colorants have become a developing market because of consumer preferences, and more cost-effective and stable production is necessary. In the present study, a natural green colorant was obtained via microwave-assisted extraction from spinach waste to produce affordable, environmentally-friendly, and innovative colorants. The extracts were encapsulated with zein via uniaxial and coaxial electrospinning techniques to overcome the stability issues associated with their natural green color. The encapsulation efficiencies of uniaxially encapsulated chlorophyll extracted from spinach waste by microwave were 63.50 and 57.18 for chlorophyll a and b, respectively. The efficiencies of chlorophyll a and b by coaxial electrospinning were found 49.53% and 88.58%, respectively. The microwave-assisted extraction and the addition of eumelanin may contribute positively to the antioxidant activity and thermal stability of electrospun samples. The stability test against light revealed that 61% of chlorophyll a could be preserved by uniaxial electrospinning. In addition, when chlorophyll-loaded nanofibers were incorporated into yogurt, a more stable green color was achieved during storage.

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  AtıfScopus10·WoS9·OpenAlex11

  İncele
• MakaleAçık Erişim2021Scopus SJRQ1/r/bayburt/13360
  Extraction of Phenolic Compounds from Cornelian Cherry (Cornus mas L.) Using Microwave and Ohmic Heating Assisted Microwave Methods

  Kutlu, Naciye; Isci, Asli; Sakiyan, Ozge; Yilmaz, Asim Egemen

  In this study, it was aimed to extract bioactive compounds (phenolics and anthocyanins) from cornelian cherry (Cornus mas L.) using microwave (ME) and ohmic heating assisted microwave extraction (OH-ME) as an alternative to maceration (M). Total phenolic compound (TPC), total monomeric anthocyanin content (TMAC), antioxidant activity (AA), water-soluble solid matter (WSSM), color values, and pH of the extracts were determined. The effect of extraction time, solid to solvent ratio, microwave power, electrical field strength, and holding time during ohmic heating on extraction characteristics was investigated for different methods. Ohmic heating application prior to extraction has enhanced the TPC yield by 1.1 and 5.4-folds compared to that of ME and M, respectively. Moreover, the extraction time was decreased by approximately 42 and 95% as regards ME and M, respectively. The highest TMAC value (0.65 mg cya-3-glu/g dry matter) was observed with OH-ME. The experimental data obtained by ME and OH-ME methods was fitted to the Peleg model to describe the TPC yields. These results indicate that the combined application of ohmic heating and microwave extraction is a potential alternative method for total phenolic compounds extraction from cornelian cherry due to increased yields and reduced extraction times.

  AtıfScopus48·WoS40·OpenAlex47

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