Person: SUNA, SENEM
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SUNA
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SENEM
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Publication Lemon verbena (lippia citriodora kunth) beverages: Physicochemical properties, contents of total phenolics and minerals, and bioaccessibility of antioxidants(Codon Publications, 2019-01-01) Suna, S.; İncedayı, B.; Tamer, C. E.; Özcan-Sinir, G.; Çopur, Ö. U.; SUNA, SENEM; İNCEDAYI, BİGE; TAMER, CANAN ECE; ÖZCAN SİNİR, GÜLŞAH; ÇOPUR, ÖMER UTKU; Ziraat Fakültesi; Gıda Mühendisliği Bölümü; 0000-0002-6947-2167; 0000-0001-6128-7453; 0000-0003-3954-0058; AAG-8241-2021; AAF-3324-2020; AAG-8336-2021; AAG-8503-2021; AAQ-8178-2020; AAG-8277-2021In this study, dried lemon verbena (Lippia citriodora Kunth) leaves were used for functional beverage production with addition of sucrose and / or sweeteners. Carbonated or mineral enriched versions of these beverages were also produced. The highest antioxidant bioaccessibility was obtained from sucrose added and natural mineral water enriched beverage both in FRAP (47.01 %) and CUPRAC (11.13 %) assays. In general, all beverages were rich in potassium and the mineral enriched beverages were high in magnesium and calcium. The ascorbic acid value was maximum in carbonated beverages. While energy reduced beverages were rich in total phenolics, sucrose added and natural mineral water enriched beverages showed the highest functionality in terms of bioaccessible antioxidants.Publication Production of low calorie persimmon marmalades with stevia and maltitol: Physicochemical properties and in vitro bioaccessibility of polyphenols(Springer, 2022-11-12) Suna, Senem; Kalkan, Selena; Dinç, Merve; Çopur, Ömer Utku; SUNA, SENEM; Kalkan, Selena; Dinç, Merve; ÇOPUR, ÖMER UTKU; Ziraat Fakültesi; Gıda Mühendisliği Bölümü; 0000-0002-6947-2167; AAQ-8178-2020; AAG-8336-2021; JCI-2276-2023; KCU-6131-2024Effects of stevia and maltitol usage in different amounts for the replacement of sugar on physicochemical, sensorial and bioactive properties of newly developed low-calorie persimmon marmalades were investigated. Brix degrees, total acidity and pH of the products ranged between 33.56-56.50 degrees, 0.64-0.75 g/100 g and 3.64-3.75 respectively. L* and Hue of the fruit increased after produced into marmalades while a* and Chroma decreased and b* fluctuated. Total phenolic content (TPC) (23.24-66.89%) and total antioxidant capacity (TAC) (2, 2-diphenyl-1-picrylhydrazyl radical scavenging assay (DPPH): 34.07-65.18%, Cupric ion reducing antioxidant capacity (CUPRAC): 12.44-61.88%) decreased with marmalade processing. TPC of all the samples from pre- and post in vitro gastrointestinal digestion steps showed an increasing trend as exhibiting a high recovery and bioaccessibility. A significant increase of TAC in gastric and intestinal digests was observed from CUPRAC assay, while a decrement (43.79-52.46%) in intestinal phase following the increment (83.81-114.96%) in gastric environment was analysed in DPPH method (p <0.05). Stevia added formulations contained the highest amounts of TPC and TAC between the products in pre- and each postdigestion stages (p < 0.05). Persimmon was succesfully evaluated into sensorially accepted, nonseasonal functional marmalades that have been found appropriate to be stated as "no sugar added" and "energy reduced" according to National and International Legislations. Moreover, formulations would be able to serve as an optimized design for further food products to be prepared using various sweeteners while creating an important output in terms of commercialization and industrial added value.[GRAPHICS].Publication Investigations of some quality parameters and mathematical modeling of dried functional chips(Springer, 2019-11-23) Halil, Tuğce; Tamer, Canan Ece; TAMER, CANAN ECE; Suna, Senem; SUNA, SENEM; Karabacak, Azime Özkan; ÖZKAN KARABACAK, AZİME; Ziraat Fakültesi; Gıda Mühendisliği Bölümü; 0000-0002-6947-2167; 0000-0003-4175-4477; AAH-2319-2019; AAQ-8178-2020; AAG-8503-2021In this study, the production of green olive, chickpea and haricot bean added potato chips was investigated in order to produce a functional snack food appealing to consumers from all age groups. Chips were produced by hot air drying (75-85 degrees C), vacuum drying (75-85 degrees C, 250 mbar), and microwave drying (90 W and 180 W). The effective diffusion coefficient of chips was calculated as between 4.25 x 10(-9)- 4.38 x 10(-8). When the drying behavior of samples was examined; vacuum drying, convectional drying and microwave drying fitted in Page and Modified Page models. Total acidity, pH, salt, protein, total phenolics and antioxidant activity analyses were conducted in chips and chips doughs. In olive added chips, the highest total phenolic content was determined in the sample produced by vacuum drying method at 85 degrees C. Moreover, for chickpea-olive added chips, the highest total phenolic content and antioxidant activity were determined in microwave dried (180 W) samples. In haricot bean and olive added chips, antioxidant activity showed differences according to drying methods. Chickpea and haricot bean addition into chips doughs were increased the protein content in dried samples.Publication Investigation of drying kinetics and physicochemical properties of mulberry leather (pestil) dried with different methods(Wiley, 2019-08-01) Suna, Senem; Özkan Karabacak, Azime; SUNA, SENEM; ÖZKAN KARABACAK, AZİME; Fakültesi Ziraat; Gıda Mühendisliği Bölümü; 0000-0002-6947-2167; 0000-0003-4175-4477; AAQ-8178-2020; AAH-2319-2019The effects of microwave (90 and 180 W), hot air (60 and 70 degrees C) and vacuum (60 and 70 degrees C with 250 mbar) drying techniques on drying characteristics, total phenolic content (TPC), antioxidant capacity (AC), color and texture of mulberry pestils were investigated. L*, b*, C*, and h degrees decreased while a* value was generally increased in pestils. Hardness, springiness, chewiness, and gumminess of the samples were found to be significantly different (p < 0.05). Between the applied seven thin layer drying models, Page and Modified Page were best fitted with the highest R-2 (0.9997) and the lowest values of RMSE (0.000927) and chi(2) (0.000011). Effective moisture diffusivity (D-eff) of pestils ranged from 4.42 x 10(-8) to 8.47 x 10(-7) m(2)/s. Drying treatments caused an increment in TPC (1.41%-57.13%) and AC (0.37%-72.79%). These highest results were both obtained from microwave 180 W (TPC: 209.14 mg GAE/100 g dw and AC: 181.37 mu mol TE/100 g dw). Practical applications Mulberry is a perishable fruit with several health benefits. It can be consumed raw or in the form of fruit leather (pestil), jam, jelly, marmalade. By pestil production, in which fruit pulp is dehydrated into leathery sheets, mulberry can be processed into a nonseasonal shelf life prolonged product for markets without the additon of preservatives. In this study, drying kinetics of mulberry pestil by microwave, hot air, and vacuum methods were evaluated via mathematical modeling. Page and Modified Page were the best thin layer drying models for pestil production. Drying characteristics were assessed for the development of food specific system in industrial usage and the simulation and optimization of the drying process. Drying treatmens affected texture and color of pestils significantly while exerting higher total phenolic content and antioxidant capacity when compared to non-dried formulation. Microwave was determined as a promising method to yield high-quality pestils with greater nutritional properties and the advantage of reduced drying times.Publication Drying characteristics, mineral content, texture and sensorial properties of pumpkin fruit leather(Plapiqui(uns-conicet), 2021-01-01) Karabacak, Azime Özkan; Suna, Senem; Dorak, Saliha; Copur, Ömer Utku; ÖZKAN KARABACAK, AZİME; SUNA, SENEM; Dorak, Saliha; ÇOPUR, ÖMER UTKU; Ziraat Fakültesi; Gıda Mühendisliği Bölümü; 0000-0003-4175-4477; 0000-0002-6947-2167; AAH-2319-2019; AAQ-8178-2020; CMO-0611-2022The objective of this study was to investigate the influences of hot air (HAD: 50, 60, 70 degrees C), vacuum (VD: 50, 60, 70 degrees C at 300 mbar) and microwave methods (MWD: 90, 180W) on drying characteristics, effective moisture diffusivity (D-eff), mineral content, texture, and sensorial properties of pumpkin pestils. MWD led to the highest drying rate and the lowest drying time in all methods. Page and Modified Page were ideally fitted to experimental results among seven thin layer drying models. Mineral content (Ca, K, Na, P, Mg, Fe, Zn, Cu, Mn) of the pestils showed higher values than non-dried (paste) mixture. Significant differences were determined between textural features of the pestils (p < 0.05). Furthermore, products dried with HAD and VD were preferred rather than MWD in terms of sensorial properties.Publication Antioxidant capacity and physicochemical characteristics of carbonated Erica Arborea Tea Beverage(Mdpi, 2018-09-01) Suna, Senem; Özcan-Sınır, Gülşah; Tamer, Canan Ece; İncedayı, Bige; Çopur, Ömer Utku; SUNA, SENEM; ÖZCAN SİNİR, GÜLŞAH; TAMER, CANAN ECE; İNCEDAYI, BİGE; ÇOPUR, ÖMER UTKU; Ziraat Fakültesi; Gıda Mühendisliği Bölümü; 0000-0002-6947-2167; 0000-0003-3954-0058; 0000-0001-6128-7453; AAQ-8178-2020; AAF-3324-2020; AAG-8503-2021; AAG-8277-2021; AAG-8241-2021; AAG-8336-2021The current study was aimed to generate an innovative tea beverage which has water infusion of Erica arborea. Dehydrated Erica arborea leaves were extracted in boiling water and the solution was brix value-balanced to 8 degrees with sucrose, acid, natural lemon flavor, and antimicrobial agents. Following the blending of additives, carbonation was applied. Besides some physicochemical parameters, total phenolics, bioaccessibility of total phenols, antioxidant capacity, and bioaccessible antioxidants with 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and cupric ion reducing antioxidant capacity assay (CUPRAC) methods were also investigated. The green-and yellow-tinted beverage was especially rich in potassium and calcium. The total phenolics and bioaccessible phenolics of the beverage were identified as 174.06 +/- 24.53 mg Gallic Acid Equivalent (GAE) 100 mL(-1) and 96.07 +/- 3.96 mg GAE 100 mL(-1), correspondingly. Antioxidant capacity was 27.20 +/- 1.09 mu mol trolox mL(-1), and the bioaccessible antioxidant capacity was 0.17 +/- 0.02 mu mol trolox mL(-1) in DPPH. Measured antioxidant capacity and bioaccessible antioxidant capacity with other assays were 22.41 +/- 2.49 and 3.09 +/- 0.44 mu mol trolox mL(-1) for FRAP; 21.09 +/- 1.65 and 0.02 +/- 0.00 mu mol trolox mL(-1) for CUPRAC. In addition to its nutritional and functional features, Erica arborea tea beverage is preferred in accordance with the panelists' sensorial decision.Publication Effects of different pretreatments on the physicochemical characteristics and quality criteria of chestnut (Castanea sativa Mill.) pickle: A new value-added product(Wiley, 2021-05-06) Suna, Senem; Avşar, Betül; Koçer, Serhat; Çopur, Ömer Utku; SUNA, SENEM; Avşar, Betül; ÇOPUR, ÖMER UTKU; Ziraat Fakültesi; Gıda Mühendisliği Bölümü; 0000-0002-6947-2167; 0000-0002-1951-7937; AAQ-8178-2020; CEO-9969-2022 ; AAG-8336-2021Effects of roasting (80 degrees C, 3 and 5 min) and boiling (chestnut to water 1:2 (w/w), 7 and 9 min) pre-treatments and brine ratios (5% and 7%) on physicochemical and bioactive properties of firstly developed chestnut pickles were investigated. Dry matter and total acidity increased by pickling while pH and salt were decreased. Total, reducing sugars and starch of pickles ranged between 2.13-3.53, 0.28-0.45, and 18.61-23.67 g/100 g respectively. L*, b*, C*, and h degrees decreased in comparison to chesnut as a* displayed an increment. The highest phenolics were determined from the pickle produced in 7% brine without any treatments (126.11 mg GAE/100 g dm) while the pickle produced in 7% brine by 5 min roasting had the highest antioxidant capacity (CUPRAC: 14.83, FRAP: 21.38 mu mol TE/g dm). Usage of chestnut as a raw material allowed designing of a sensorially accepted pickle additionally, roasting and salt ratio were concluded as the key factors.Practical applications High-quality chestnuts can be used in various forms such as frozen, sterilized, or dried in gastronomy. On an industrial scale, chestnut is processed into canned products, candies, creams, flour or it can be used as ingredients for biotechnological purposes due to its high starch content. Processing low or good quality chestnuts into alternative end products is an economically profitable way as well as reducing the waste levels from industrial processing while increasing the added value of chestnut products. Thus, by pickle production, chestnut was processed into a nonseasonal shelf life prolonged product for markets for the first time.Publication Evaluation of bioaccessibility and functional properties of kombucha beverages fortified with different medicinal plant extracts(TUBİTAK, 2021-01-01) Tamer, Canan Ece; TAMER, CANAN ECE; Temel, Sehime Gulsun; TEMEL, ŞEHİME GÜLSÜN; Suna, Senem; SUNA, SENEM; Karabacak, Azime Ozkan; ÖZKAN KARABACAK, AZİME; Ozcan, Tulay; ÖZCAN, TÜLAY; Ersan, Lutfiye Yilmaz; YILMAZ ERSAN, LÜTFİYE; Kaya, Berra Turkol; Copur, Omer Utku; ÇOPUR, ÖMER UTKU; Tıp Fakültesi; Genetik Ana Bilim Dalı; 0000-0002-9802-0880; 0000-0002-6947-2167; 0000-0003-4175-4477; 0000-0002-0223-3807; AAQ-8178-2020; AAG-8503-2021; AAG-8194-2021; AAH-2319-2019; AAC-1982-2022In this study, sweetened black and green tea were utilized as substrate for kombucha fermentation. Linden, lemon balm, sage, echinacea, mint, and cinnamon infusions were added to kombucha to design a novel beverage with Unproved functional and organoleptic characteristics. After fermentation, the antioxidant capacity (AC) of the kombucha increased by 13.96% 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH), 48.90% ferric reducing antioxidant power (FRAP), and 55.54% cupric reducing AC (CUPRAC). On days 0 and 9 of storage, the bioaccessibility of the total phenolics and AC (FRAP and CUPRAC) in all of the samples showed a significant increase after gastric and intestinal digestion when compared to pregastric digestion (P < 0.05). The AC (DPPH) after in vitro digestion at the beginning and end of storage in all of the beverages also increased after gastric digestion when compared to pregastric digestion (P < 0.05); however, it decreased after intestinal digestion (P < 0.05). By conducting in vitro and in vivo studies, the effects of kombucha on health and nutrition need to be further investigated.