Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Karatas, Seyda Merve(3)
- Ekici, Lutfiye(2)
- Akar, Zeynep(1)
- Aksoy, Canan(1)
- Berktas, Serap(1)
- Boyraci, Gulsum Merve(1)
- Capar, Tugba Dursun(1)
- Dedebas, Tugba(1)
- Dertli, Enes(1)
- Develi, Ibrahim(1)
- Değirmenci, Atiye(1)
- Dogan, Mahmut(1)
- Düzgün, Azer Özad(1)
- Genc, Berna(1)
- Karaman, Safa(1)
- Kardil, Uğur(1)
- Kavuncuoglu, Hatice(1)
- Kayacier, Ahmed(1)
- Sagdic, Osman(1)
- Toker, Ömer Said(1)
- Tunc, Merve Tugce(1)
- Yalcin, Hasan(1)
- Yildiz, Oktay(1)
- Yüksel, Ferhat(1)
- Çam, Mustafa(1)
Yayınlar
- MakaleYalnız künye2026Scopus SJRQ3Effects of Dietary Fibers Obtained from Cold-Press By-products on the in vitro Digestion of Spirulina
Berktas, Serap
This study aimed to investigate the effects of dietary fibers obtained from cold-pressing by-products on the bioactivity of Spirulina (SP) during in vitro digestion. For this purpose, insoluble dietary fibers (CCDL and KCDL) were extracted from cold-pressing by-products of flaxseed and black cumin. SP was combined with CCDL and KCDL, and subjected to an in vitro digestion protocol (INFOGEST). The results showed that the total phenolic content of SP decreased after oral and gastric digestion with the addition of dietary fiber. After small intestinal digestion, the total phenolic content increased. Antioxidant activity values (DPPH and ABTS) decreased in the presence of dietary fiber, while chlorophyll values increased after small intestinal digestion. In particular, in the presence of CCDL, the chlorophyll content increased from 1.61 mg g(-1) to 4.48 mg 2 g(-1) after small intestinal digestion. Furthermore, the bioactivity values of SP after in vitro digestion varied depending on the type of dietary fiber. While KCDL was effective in increasing phenolic compound content, CCDL was more effective in increasing chlorophyll content. Considering the bioactivity values of SP after oral, gastric, and small intestinal digestion, it was determined that the values increased especially in the small intestine. This highlights the possibility that the bioaccessibility and therefore the bioavailability, of SP can be increased through the incorporation of dietary fiber. The addition of bioactive compounds to the development of functional foods rich in dietary fiber has advantages for the food industry in terms of designing and improving healthy foods. This study emphasizes that the in vitro digestion of Spirulina is regulated in the presence of CCDL and KCDL, and that the addition of dietary fibers may contribute to the potential health benefits of Spirulina.
- MakaleYalnız künye2026Scopus SJRQ2Honeybee Silk: A Promising Value-Added Biomaterial with Antioxidant, Antimicrobial, Antihyaluronidase, and Microstructural Characteristics
Yildiz, Oktay; Değirmenci, Atiye; Boyraci, Gulsum Merve; Aksoy, Canan
Bee products with their huge potential are becoming more valuable beyond food industry. Honeybee silk is non-utilized biomaterial in any commercial applications and even burned during the processing of beeswax. Although studies concerning insects silks are commonly on spider and silkworm silks, honeybee silk remains unexplored. Scanning electron microscope and energy dispersive X-ray spectroscopy (SEM–EDX) were used to identify chemical composition via elemental mapping of the native form of honeybee silk. Honeybee silk, in the form of thin layer inside the honeycomb cells, was processed through a series of steps to separate it from beeswax. Protein content was evaluated and revealed a composition of approximately 11.69%, indicating its strong biopolymeric origin. Amino acid analysis of honeybee silk performed by RP-HPLC revealed the presence of both polar and nonpolar amino acids, indicating a well-balanced amino acid profile. Antioxidant, antimicrobial, and anti-hyaluronidase properties of processed honeybee silk were presented. The methanolic extracts of honeybee silk were found to have higher total phenolic content (TPC) and antioxidant activity as assessed by DPPH (2,2-diphenyl-1-picrylhydrazyl) and FRAP (ferric reducing antioxidant power) assays than the aqueous extracts. While no antimicrobial activity was found for aqueous extracts, methanolic honeybee silk extract exhibited antimicrobial activity against Escherichia coli, Staphylococcus aureus, Bacilluscereus, Staphylococcus epidermidis, and Candida albicans. The hyaluronidase inhibition values (IC50) were found as 0.0094 and 0.0079 g/mL for aqueous and methanolic honeybee silk extracts, respectively. The aforementioned findings indicate that honeybee silk as a promosing value-added product is worthy of attention from pharmaceutical industries and future studies.
- MakaleAçık Erişim2026Scopus SJRQ1Characterization and Bioactive Properties of Exopolysaccharides from Pediococcus ethanolidurans Isolated from Kırçan (Smilax excelsa L.) Pickles
Karatas, Seyda Merve; Genc, Berna; Tunc, Merve Tugce
In this study, the characterization of some bioactive content of exopolysaccharide (EPS) extracted from Pediococcus ethanolidurans isolated with Smilax excelsa L. from conventionally produced pickles were investigated. Background: Although this study is the main study involving the characterization of EPS obtained from Pediococcus ethanolidurans, it is important because it has determined a natural polysaccharide that can be used in different fields in the industry. According to the obtained results, sugar analysis by GC-MS revealed that EPS consisted of glucose (7.59%), mannose (41.96%), fructose (16.98%), arabinose (3.15%) and rhamnose (30.30%). From the thermal behavior determined by differential scanning calorimetry (DSC), it was concluded that it should not be heated close to 250 °C. At the same time, according to the thermogram obtained as a result of X-ray diffraction (XRD) analysis, it was found to have a crystalline structure. EPS, which reached 73.844% efficiency, showed antibacterial activity against Listeria monocytogenes, Staphylococcus aureus and Escherichia coli, while 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) scavenging activity was detected at 0.24 mM. It also has remarkable results, seen in cytotoxicity analysis against healthy HT-29 cells, demonstrating that it has proliferative activity as high as %125 In short, Pediococcus ethanolidurans was found to be a novel EPS producer with impressive properties.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ1Effects of sunlight ripening process on the biological activities of persimmon (Diospyros kaki L.) peel and pulp extracts
Kardil, Uğur; Akar, Zeynep; Düzgün, Azer Özad
The aim of the study was to evaluate the biological properties of the peel and pulp extracts of persimmons, with consideration of the impact of different ripening conditions (B: on-branch ripened and S: sunlight ripened). The data demonstrated that the sunlight ripened persimmon peel (S. peel) extract exhibited a higher total phenolic and flavonoid content, with 157 and 7.3 µg/mL GAE respectively. The S. peel extract exhibited the highest antioxidant activity, exhibiting 1.1578 mg/mL IC50, 54.095 and 0.0262 µM Trolox equivalent (TE)/g fresh weight (FW), as determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPH•) radical scavenging assay, ferric reducing antioxidant power (FRAP) and cupric reducing antioxidant capacity (CUPRAC) respectively. LC-MS/MS analysis revealed that the peel and pulp phenolic composition of persimmon ripening process different conditions changed. The activity of protocatechuic, chlorogenic, caffeic and ferulic acids identified in persimmon extracts was determined by HPLC-DAD-FRAP assay. ICP-OES analysis revealed that potassium exhibited the highest mineral content of persimmon, with values ranging from 575.680 to 2031.360 mg/kg. The S. peel extract was more inhibitory activity against bovine carbonic anhydrase (BCA) and α-glucosidase then other extracts. Moreover, the S. peel extract was found to demonstrate the highest level of antibiofilm activity, reducing the strong biofilm formation capacity of the A. baumannii isolate to negative, both qualitatively and quantitatively. The study suggests that the ripening of persimmon fruit in sunlight may increase biological activity and may be useful in the prevention and treatment of diseases associated with oxidative damage, diabetes and bacterial infections.
- MakaleYalnız künye2023Scopus SJRQ2Phenolic Components, Mineral Composition, Physicochemical, and Bioactive Properties of Opuntia ficus-indica with Different Drying Methods
Capar, Tugba Dursun; Dedebas, Tugba; Kavuncuoglu, Hatice; Karatas, Seyda Merve; Ekici, Lutfiye; Yalcin, Hasan
Cactus pear fruit (Opuntia ficus-indica) have nutritional and antioxidant properties due to the presence of vitamins, fibers, minerals, and polyphenols. The present paper aims to examine the effects of drying methods (sun, oven, vacuum, and freeze) on the bioactivity and antimicrobial quality of prickly pear fruit. Total phenolic content (TPC), antioxidant (DPPH) and antimicrobial activity, mineral content, phenolic compounds, and color values were investigated. The highest antioxidant activity (DPPH) and color values were observed in the freeze-dried samples, which were very close to the values for fresh samples. The total phenolic content (TPC) of the freeze-dried sample was 503.53 mg GAE/100 g. The most abundant phenolic compound was p-hydroxybenzoic acid (210 ppm) identified in fresh and freeze-dried fruit extract, which may be more effective antimicrobials than the rest. The mineral content of freeze- and vacuum-dried samples was very close to that of fresh fruit. This study indicates that freeze-drying of prickly pear fruit improved the bioactive and antimicrobial properties without leading to nutritional loss.
AtıfScopus5WoS4OpenAlex3İncele - MakaleYalnız künye2021Scopus SJRQ2Effects of GSM 1800 band radiation on composition, structure and bioactivity of exopolysaccharides produced by yoghurt starter cultures
Karatas, Seyda Merve; Ekici, Lutfiye; Develi, Ibrahim; Dertli, Enes; Sagdic, Osman
In this study, the effects of GSM 1800 band radiation on composition, structure and bioactivity of exopolysaccharides (EPSs) produced by Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus were determined. For this, GSM 1800 band radiation was applied to both cultures and characteristics of EPSs extracted from the control groups (K) and the radiation stressed groups (R) were determined. An alteration in the chemical composition of the EPSs was observed and EPS production levels and molecular weights of the EPSs increased following the GSM 1800 band radiation application. Alterations in the functional groups, thermal and morphological characteristics of EPSs following the GSM 1800 band radiation application were confirmed by FTIR, TGA and SEM analysis, respectively. Importantly no alterations in the antioxidant and antibacterial activity of the EPSs were observed following the radiation application. These results suggested the effects of the GSM radiation on final characteristics of EPSs from yogurt starter cultures.
AtıfScopus8WoS5İncele - MakaleAçık Erişim2014Scopus SJRQ1Physicochemical, bioactive, and sensory properties of persimmon-based ice cream: Technique for order preference by similarity to ideal solution to determine optimum concentration
Karaman, Safa; Toker, Ömer Said; Yüksel, Ferhat; Çam, Mustafa; Kayacier, Ahmed; Dogan, Mahmut
In the present study, persimmon puree was incorporated into the ice cream mix at different concentrations (8, 16, 24, 32, and 40%) and some physicochemical (dry matter, ash, protein, pH, sugar, fat, mineral, color, and viscosity), textural (hardness, stickiness, and work of penetration), bioactive (antiradical activity and total phenolic content), and sensory properties of samples were investigated. The technique for order preference by similarity to ideal solution approach was used for the determination of optimum persimmon puree concentration based on the sensory and bioactive characteristics of final products. Increase in persimmon puree resulted in a decrease in the dry matter, ash, fat, protein contents, and viscosity of ice cream mix. Glucose, fructose, sucrose, and lactose were determined to be major sugars in the ice cream samples including persimmon and increase in persimmon puree concentration increased the fructose and glucose content. Better melting properties and textural characteristics were observed for the samples with the addition of persimmon. Magnesium, K, and Ca were determined to be major minerals in the samples and only K concentration increased with the increase in persimmon content. Bioactive properties of ice cream samples improved and, in general, acetone-water extracts showed higher bioactivity compared with ones obtained using methanol-water extracts. The technique for order preference by similarity to ideal solution approach showed that the most preferred sample was the ice cream containing 24% persimmon puree.
AtıfScopus123WoS109OpenAlex168İncele