Browsing by Author "Cavusoglu, Seyda"

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Biochemical and Morphological Characteristics of Some Macrofungi Grown Naturally
(Mdpi, 2021) Selem, Ezelhan; Alp, Yekbun; Sensoy, Suat; Uzun, Yusuf; Cavusoglu, Seyda; Karatas, Neva; Szopa, Agnieszka
Recently, the production of macro-fungi (mushrooms) has steadily increased, and so has their economic value, in global terms. The use of functional foods, dietary supplements, and traditional medicines derived from macro-fungi is increasing as they have numerous health benefits as well as abundant nutrients. This study aimed to determine some biochemical contents (pH, soluble solid contents (SSC), total antioxidant capacity (TAC) and total phenolic contents (TPC)) of eight edible macro-fungi species growing naturally (in the wild) in Turkey. The samples were collected in the Van Yuzuncu Yil University (VAN YYU) campus area in the months of April-May 2018, in different locations, and brought to the laboratory, and the necessary mycological techniques were applied for their identification. Location, habitats, collection dates and some morphological measurements were determined for all identified species. Biochemical parameters of the macro-fungi species were analyzed separately both in cap and stem. The color values (L, a, b, Chroma and hue) were separately evaluated on cap surface, cap basement and stem. Results showed that there were significant differences for most of the biochemical parameters in different organs between and within species. The pH, SSC, TAC and TPC values varied from 6.62 to 8.75, 2.25 to 5.80 & DEG; brix, 15.72 to 57.67 TE mg(-1) and 13.85 to 60.16 gallic acid equivalent (GAE) fresh weight basis. As a result of the study, it was concluded that the parameters such as total antioxidant capacity, total phenolic content and soluble content in Morchella esculenta, Helvella leucopus, Agaricus bitorquis and Suillus collinitus were higher than for the other species and clearly implied that they may be further exploited as functional ingredients in the composition of innovative food products.
Determination of Phenolic Compound and Organic Acid Contens of Some Grape Varieties Grown in Hizan (Bidis) Province
(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2020) Uyak, Cuneyt; Dogan, Adnan; Sensoy, Ruhan Ilknur Gazioglu; Keskin, Nurhan; Cavusoglu, Seyda; Cakmakci, Ozlem; Kunter, Birhan
Aim of this study was to determine phenolic compound and organic acid contents of 17 local grape varieties grown in Hizan (Bitlis) province of Turkey. Organic acid and phenolic compound amounts were determined via HPLC (High Performance Liquid Chromatography). Organic acids amount of grape varieties ranged from 1362.06 mu g g(-1) (Sapi Beyaz) to 4269.90 mu g g(-1) (Husni Beyaz) fortartaric acid and from1072.70 mu g g(-1) (Alaki) to 2858.69 mu g g(-1) (Kus Uzumu) for malic acid. Phenolic compound amounts of grape varieties ranged from 4.718 mu g g(-1) (Husni Beyaz) to 33.177 mu g g(-1) (Sapi Yesil) for gallic acid, from 6.293 mu g g(-1) (Beyaz Bineteti) to 20.201 mu g g(-1 )(Alaki) for vanilic acid, from 0.174 mu g g(-1 )(Beyaz Bineteti) to 2.830 mu g g(-1) (Alaki).for rutin, from 0.193 mu g g(-1) (Beyaz Bineteti) to 1.395 mu g g(-1 )(Kus uzumu) for protocatechuic acid, from 0.509 mu g g(-1) (Husni Beyaz) to 12.036 mu g g(-1) (Beyaz Guzane) for clorogenic acid, from 0.050 mu g g(-1 )(Siyah Guzane) to 0.485 mu g g(-1) (Husni Beyaz) for syringic acid, from 0.043 mu g g(-1) (Alaki) to 0.211 mu g g(-1) (Kirmizi Tayfi) for p-coumaric acid, from 0.041 mu g g(-1) (Beyaz Sinciri) to 1.238 mu g g(-1) (Siyah Guzane) for ferulic acid, from 0.023 mu g g(-1) (Beyaz Sinciri) to 1.083 mu g g(-1) (Kus Uzumu) for o(-)coumaric acid from 0.209 mu g g(-1) (Siyah Guzane) to 2.360 mu g g(-1) (Inek Memesi) for resveratrol, from 0.086 mu g g(-1) (Beyaz Sinciri) to 1.228 mu g g(-1) (Alaki) for florodiz.
The Effect of Different Doses of 1-Methylcyclopropene on Postharvest Physiology and Predicting Ethylene Production Through Multivariate Adaptive Regression Splines in Cocktail Tomato
(Mdpi, 2022) Bahar, Askin; Cavusoglu, Seyda; Yilmaz, Nurettin; Tekin, Onur; Ercisli, Sezai
Maintaining the postharvest quality of tomatoes, which are essential in the world vegetable trade, is very important; otherwise, storage may cause severe quality and economic losses. This study aimed to determine the effects of 1-MCP treatments on quality and storage time to prevent quality loss and deterioration in tomatoes due to high temperature and to predict ethylene production through the Multivariate Adaptive Regression Splines algorithm during long-term storage. For this purpose, same-sized fruits were divided into three different groups. Two groups were treated with 1-MCP (625 and 1250 ppb), and the untreated fruit was the control. Then, the tomatoes were stored for 39 days at a temperature of 20 degrees C and relative humidity of 85-90%. The results obtained from the present study showed that the 1-MCP treatments prolonged the life and maintained the quality of tomato fruit during storage. The ethylene production and respiration rate were significantly lower in 1-MCP-treated fruit than in the untreated fruit during the storage period (p < 0.05). According to the Multivariate Adaptive Regression Splines algorithm, it was observed that increasing doses of 1-MCP inhibited ethylene production. Furthermore, weight loss and respiratory rate were effective on ethylene production at 100 and 43.9%, respectively. In conclusion, treating the fruit with 1250 ppb of 1-MCP was determined to be the best practice for maintaining all quality criteria during storage.
Effect of Egg White Protein and Agar-Agar on Quality of Button Mushrooms (Agaricus Bisporus) During Cold Storage
(Tubitak Scientific & Technological Research Council Turkey, 2022) Saran, Erdi Yildirim; Cavusoglu, Seyda; Alpaslan, Duygu; Eren, Erkan; Yilmaz, Nurettin; Uzun, Yusuf
The commercialization of mushrooms is critical because they have a short shelf life. For this reason, we investigated the effect of agar-agar and egg white protein on weight loss, polyphenol oxidase and catalase, protein content, total phenolics, total antioxidant capacity, respiration rate, ethylene production and storability of button mushrooms. Our findings suggested that the treatment of edible coating delayed remarkably senescence and maintained the quality of button mushroom. Egg white protein coating was more effective on protein content, total phenolics, antioxidant capacity, respiration rate, and ethylene production than agar-agar coating. On the other hand, agar-agar coating was more effective on weight loss, polyphenol oxidase, catalase, and color changes. Ethylene production and respiration rate were significantly (p < 0.05) lower in edible coating-treated samples than uncoated samples. Furthermore, a positive correlation was found between total phenolic content and antioxidant activity. It can be recommended that abovementioned edible coatings could be used as a commercial treatment for maintaining the quality of button mushrooms during long-term storage period.
Effect of Exogenous Essential Oil Treatments on the Storage Behaviour of Apricot Fruit Harvested at Different Altitudes
(Sciendo, 2023) Yilmaz, Nurettin; Islek, Firat; Cavusoglu, Seyda; Necas, Tomas; Ondrasek, Ivo; Ercisli, Sezai
Due to the short shelf life of fresh apricots, special postharvest preservation techniques and practices are necessary to avoid significant economic losses. The purpose of the current study is to bring to light an approach that can be used to extend the storage life of apricot fruits treated with essential oils (EOs) (peppermint, thyme and carob EO) and examine the effects of two altitudes (1000 m and 1200 m) on the organic acid levels and respiration rate of apricot fruit during long-term storage. The results show that growing apricots at high altitudes increases the level of organic acids in the fruit, improving its quality and extending its postharvest life. Additionally, treating apricots with EOs postharvest slows down the respiration rate, reducing the consumption of organic acids during storage compared to the untreated fruit. The organic acid content was significantly higher in 'Kabaasi' than in 'Hacihaliloglu', and fruit harvested at 1200 m had significantly higher levels of organic acid than the fruit harvested at 1000 m. During storage, the highest organic acid content and the lowest respiration rate were observed in the fruit of both cultivars treated with peppermint, carob, and thyme oil, as compared to control fruit, respectively. To summarize, the use of EOs as postharvest treatment for apricot is recommended for maintaining the quality of the fruit during extended storage.
Effect of Methyl Jasmonate Treatments on Fruit Quality and Antioxidant Enzyme Activities of Sour Cherry (Prunus Cerasus L.) During Cold Storage
(Galenos Publ House, 2021) Cavusoglu, Seyda; Yilmaz, Nurettin; Islek, Firat; Tekin, Onur
The study was carried out to investigate the effect of methyl jasmonate (MeJA) treatments (0.5 and 1.0 mM MeJA) on quality characteristics such as weight loss, respiration rate, ethylene production, color, total phenolic content (TPC), total antioxidant capacity (TAC) and antioxidant enzyme activities of sour cherry fruit (Prunus cerasus L. cv. 'Kutahya') during cold storage. Fruit were stored at 0 +/- 1 degrees C and 90 +/- 5% RH for 36 days. The results indicated that MeJA treatments showed higher levels of total phenolic content, total antioxidant capacity and quality and were also effective on superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), malondialdehyde (MDA), ethylene production and respiration rate. In conclusion, 0.5 mM MeJA treatment showed the best maintaining of fruit quality among the concentrations of MeJA. It can be suggested that sour cherry could be stored successfully for 36 days at 0 degrees C following treatment of MeJA.
Effect of Methyl Jasmonate, Cytokinin, and Lavender Oil on Antioxidant Enzyme System of Apricot Fruit (Prunus Armeniaca L.)
(Mdpi, 2021) Cavusoglu, Seyda; Yilmaz, Nurettin; Islek, Firat; Tekin, Onur; Sagbas, Halil Ibrahim; Ercisli, Sezai; Necas, Tomas
Various treatments are carried out in order to extend both the shelf life and storage life of fresh fruit and vegetables after harvest and among them non-toxic for humans, environmentally and economically friendly alternative treatments are gained more importance. In the current study, methyl jasmonate (MeJA), cytokinin, and lavender oil which are eco-friendly and safe for human health were applied on apricot fruit. The treated fruit were stored at 0 degrees C and 90-95% relative humidity for 25 days and catalase (CAT), superoxide dismutase (SOD), and ascorbate peroxidase (APX) enzyme activities and lipid peroxidation of apricots after treatments were studied. According to the findings obtained from the study, it was observed that 5 ppm cytokinin and 1000 ppm lavender oil treatments of apricot fruit gave better APX and CAT enzyme activity, respectively. In addition, better SOD enzyme activity in fruit was obtained with MeJA + lavender oil treatments. As a result, it can be emphasized that the product quality of apricot fruit is preserved as both the eco-friendly application of MeJA, cytokinin, and lavender oil separately from each other and the treatment of combinations between these compounds activate the enzymatic antioxidant defense systems of apricot fruit after harvest.
Effect of Postharvest Edible Coating Materials on Sugar and Organic Acid Content of Fresh-Cut Melons Grown With Different Fertilizer Treatments
(Tubitak Scientific & Technological Research Council Turkey, 2023) Islek, Firat; Cavusoglu, Seyda
The demand for convenient and ready-to-eat food has increased, including fresh-cut fruit and vegetables. At the same time, people are also becoming more health-conscious and are aware of the positive impact of healthy food choices on their well-being. Fresh-cut fruit and vegetables are seen as a healthy and convenient option that allows people to meet their nutritional needs without sacrificing their busy lifestyles. This study examines the use of sustainable fertilization practices for growing melons and the application of edible coatings on fresh-cut fruit to preserve their freshness and levels of sugar and organic acids during storage. The cv. 'Kirkagac' melon was used as the plant material. In the current study, the materials needed for preharvest fertilizer applications (humic acid, liquid worm fertilizer, and organomineral fertilizer) were obtained from a commercial company. The materials needed for postharvest edible coating (sodium alginate, pectin, and carob gum) were obtained from a different company. According to the results, the total sugar content of the melons increased as they ripened, but the application of an edible pectin coating helped to control this increase in sugar content better than the other treatments. This is because the pectin coating slowed down the ripening process by reducing the rate of respiration and ethylene release. The results of the study indicated that there were significant differences (p < 0.05) observed between the control group and the samples treated with edible coatings in all parameters measured. In summary, this study suggests that sustainable fertilization practices could be a viable option for cultivating melons, and that edible coatings could be used as novel materials in commercial treatments to maintain the quality of fresh-cut melons during storage.
Effect of Pre-Harvest Organic Cytokinin Application on the Post-Harvest Physiology of Pepper (Capsicum Annuum L.)
(Mdpi, 2021) Cavusoglu, Seyda; Sensoy, Suat; Karatas, Arzu; Tekin, Onur; Islek, Firat; Yilmaz, Nurettin; Mlcek, Jiri
Peppers are cultivated in almost all provinces in Turkey, making up approximately 7% of the world's production. In this study, the effects of pre-harvest cytokinin application on the postharvest physiology of pepper (Capsicum annuum L.) fruits (cv. Akra and Melek F1) grown in ecological conditions in Turkey (Van, eastern Turkey) were investigated. During the growing period, organic cytokinin(nytrozine) at two concentrations (50 and 100 ppm doses) was applied by spraying. Peppers were harvested in green maturity and then stored at 12 degrees C for 28 days. Changes in color, respiration rate, exogenous ethylene amount, antioxidative enzyme analysis (SOD, CAT and APX), lipid peroxidation, total phenolic content (TP) and antioxidant activity (AA) were determined just after the harvest and then at the 7th, 14th, 24th and 28th days. L* values for both varieties and the control sample had fluctuations during storage, and they slightly decreased after 28 days, except for the end value of cv. Melek F1 with a 50 ppm addition. In terms of respiration rate values, the difference between applications was found to be statistically significant, except for the 14th and 24th days of storage, for cv. Akra F1; and the 0th and 28th days for cv. Melek F1, respectively. It was observed that cytokinin can delay aging in peppers of both cultivars stored for 28 days. As a result, as the used cytokinin has an organic origin, is not synthetic and does not have a negative effect on human health, it can be used safely and without a significant loss of quality characteristics for peppers. These applications have positive effects on in-package gas composition, antioxidative enzymes, lipid peroxidation, total phenolics and total antioxidant activity.
Effects of Auxin Doses on Rooting of Juniperus L
(Mattioli 1885, 2017) Tektas, Ibrahim; Turkoglu, Nalan; Cavusoglu, Seyda
The present study was conducted to investigate the rooting ratios of cuttings taken from naturally grown Greek juniper trees of Gevas and Catak (Van) regions at different dates in 2013 and 2014 and under different hormone doses. The cuttings taken in October and December of 2013 and April of 2014 were immersed into water for 24 hours, then they were dipped into 3000 ppm, 5000 ppm and 7000 ppm NAA and IBA hormone solutions for 5 seconds. Cuttings were planted into growth mediums for rooting. For reliable rooting, the most proper hormone concentration was identified as 5000 ppm NAA and the most proper planting time was identified as April.
Effects of Edible Coating (Guar and Tara Gam) Applications on Post-Harvest Fruit Quality and Gene Expressions in Cherry Tomatoes
(Elsevier, 2025) Tekin, Onur; Karatas, Merve Dilek; Cavusoglu, Seyda
Post-harvest storage life of tomatoes (Solanum lycopersicum L.) is relatively short, posing a significant challenge in maintaining fruit quality. Addressing this challenge, our study aimed to evaluate the effects of 1.5 % guar gum and tara gum applications on post-harvest fruit quality and gene expression in Bamano and Yolita cherry tomato varieties cultivated under greenhouse conditions. The tomatoes were stored at 10 degrees C with 80 +/- 5 % relative humidity, and the study assessed changes in respiration rate, external ethylene production, in-package gas composition (O2 and CO2), organic acid content (citric acid, malic acid, succinic acid, tartaric acid, fumaric acid, and oxalic acid), and the expression of genes associated with respiration (LeAOX1a) and ethylene biosynthesis (LeACO1 and LeACS2). The findings revealed that 1.5 % guar and tara gum edible coatings effectively suppressed respiration rates and external ethylene production in both cherry tomato varieties. Additionally, these coatings regulated in-package gas compositions (O2 and CO2) and significantly contributed to the preservation of organic acids. Gene expression analysis indicated that in the Bamano variety, the expression levels of LeAOX1a and LeACS2 increased until the 24th day of storage, while LeACO1 expression levels rise until the 30th day. For the Yolita variety, the expression levels of respiration- and ethylene-related genes (LeAOX1a, LeACS2, and LeACO1) increased until the 24th day. In conclusion, the study demonstrated that 1.5 % guar gum edible coating effectively extended the post-harvest storage life of Bamano cherry tomatoes to 30 days and Yolita cherry tomatoes to 24 days, based on the evaluated parameters. These findings highlight the potential of guar gum coatings as a promising approach for improving the post-harvest quality and storage life of climacteric tomatoes.
Effects of Hot Water and Uv-C on Mineral Content Changes in Two Strawberry Cultivars Stored at Different Temperatures
(Tubitak Scientific & Technological Research Council Turkey, 2018) Cavusoglu, Seyda
In this study, two standard strawberry cultivars, Rubygem and Sabrina, were treated with UV-C (254 nm), hot water (60 degrees C for 10 s), and UV-C + hot water after harvesting and stored in modified atmosphere packaging (MAP) at 0 degrees C and 5 degrees C. The variations in mineral contents including phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), copper (Cu), manganese (Mn), sodium (Na), and zinc (Zn) were analyzed during storage periods. Analysis of variance for storage temperature, storage time, cultivar, and treatments showed that storing both cultivars at different temperatures followed by all treatments caused some increases in P and Mg contents as well as a decrease in Ca content. The treatments had both increasing and decreasing effects on Cu and Na contents. Moreover, increases in K, Mn, and Zn contents were observed in all treatments except for UV-C and UV-C + hot water applications for cultivar Rubygem.
Influence of Postharvest Application of 28-Homobrassinolide Onstorage Quality of Medlar Fruit
(Springer, 2019) Ekinci, Neslihan; Gokbayrak, Zeliha; Cavusoglu, Seyda; Akcay, Mehmet Emin
This study was conducted to determine the effects of 28-homobrassinolide (Hbl) applied postharvest on the storage quality of medlar fruit (Mespilus germanicaL.). Fruits were submerged into the solutions containing 3 and 5 mu M Hbl for 5min. Control fruits were submerged into distilled water for the same duration. Treated and control fruits were stored at 0 degrees C and 95% relative humidity conditions for 60days. Samples were taken at 15, 30, 45 and 60th day of storage. On the sampling dates, soluble solid content (SSC), pH, titratable acidity (TA) in malic acid, fruit firmness, weight loss, taste, browning, and color of the skin and pulp were analyzed. Results showed that these properties of the fruits changed over time in the storage and depended on the concentration of the homobrassinolide. 3 mu M Hbl treated fruits kept their firmness and initial weight longer. Fruits with 5 mu M Hbl application resulted in high TA and low SSC and provided best browning in the fruit skin. Taste was better attained and protected over alonger time with 5 mu M Hbl treatment. In conclusion, 28-homobrassinolide exerted some effects on quality of medlar fruits.
Inhibition of Growth of U87mg Human Glioblastoma Cells by Usnea Longissima Ach
(Acad Brasileira de Ciencias, 2019) Emsen, Bugrahan; Ozdemir, Ozlem; Engin, Tubanur; Togar, Basak; Cavusoglu, Seyda; Turkez, Hasan
Herbal medicines are efficient to reduce side effects in the fight against glioblastoma, which plays a critical role within brain cancer species. The recent studies designated for testing the effects of lichens that have shown numerous anticancer activities on glioblastoma so far. In the present study, different concentrations of water extract obtained from Usnea longissima Ach. were used in order to determine cytotoxic (via 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and lactate dehydrogenase tests), antioxidant (via total antioxidant capacity test), pro-oxidant (via total oxidant status test) and genotoxic (via 8-hydroxy-2'-deoxyguanosine test) effects of them on human U87MG-glioblastoma cancer cell lines. Primary mixed glial-neuronal non-cancerous cells from Sprague-Dawley rats were also utilized to measure the effects of treatments on non-cancerous cells. Based on median inhibitory concentration values, the data belonged to non-cancerous cells (2486.71 mg/L) showed distinct towering compared to U87MG (80.93 mg/L) cells. The viability of non-cancerous and U87MG cells exposed to extract is decreased in a dose dependent manner. It was also showed that low concentrations of extract notably increased total antioxidant capacity on non-cancerous cells. In addition, various phenolic compounds in extract were detected through high-perfonnance liquid chromatography. The recent results encourage that extract will be able to have therapeutic potential against glioblastoma.
Introduction and Applicability of Nonlinear Principal Components Analysis
(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2021) Demir, Yildirim; Keskin, Siddik; Cavusoglu, Seyda
Nonlinear principal component analysis (NLPCA) is a descriptive dimension reduction method that examines the relationships between variables and displays the results numerically and visually in multivariate datasets that have a linear or nonlinear relationship between them. In this study, it was aimed to present the basic explanatory information about nonlinear principal components analysis (NLPCA) and to emphasize its usability by performing application. In the study, data obtained from 270 samples for 17 continuous variables concerning 3 pepper varieties were evaluated by Principal components analysis (PCA). With the 4 principal components obtained as a result of PCA, being 3 categorical variables Variety, storage time and Application were analyzed by NLPCA. In the analysis made with PCA, approximately 74% of the total variance was explained and in the analysis made with NLPCA, approximately 58% was explained as well. As a result of the analysis; it was observed that there was a strong relationship between PC1 and storage time and variety, and PC3 and PC2 variables, while the relationship between PC4 and application variables and all variables was low. As a result; by examining the linear and nonlinear relationships between the variables in the multivariate datasets, these relationships intended to be presented in an easily interpreted and easily understandable way in two-dimensional space; it was emphasized that NLPCA can be used alone and/or together with other multivariate analysis methods.
Maintaining the Quality and Storage Life of Button Mushrooms (Agaricus Bisporus) With Gum, Agar, Sodium Alginate, Egg White Protein, and Lecithin Coating
(Mdpi, 2021) Cavusoglu, Seyda; Uzun, Yusuf; Yilmaz, Nurettin; Ercisli, Sezai; Eren, Erkan; Ekiert, Halina; Szopa, Agnieszka
Button mushrooms have a very short shelf life after harvesting and are sensitive to mechanical damage and browning. This can be a severe problem in enlarging the market and the long-distance exportation of this product. In this respect, edible coatings could be an alternative treatment to extend the shelf life of button mushrooms, maintaining their quality during long-term storage. The aim of this study was to investigate the impact of gum, agar, sodium alginate, egg white protein, and lecithin on the postharvest weight loss, color, browning, respiration rate, ethylene production, and storage life of button mushrooms. The results showed that the above-mentioned edible coatings are a promising way to extend the life and maintain the quality of button mushrooms. Significant differences (p < 0.05) were observed between the control and edible coating-treated samples in all parameters. Sodium alginate and gum were more effective in preventing weight loss, coloring, and browning than other edible coatings. On the other hand, the respiration rate and ethylene production were more suppressed by the agar and lecithin coatings compared to the others. In conclusion, it can be recommended that the above-mentioned edible coatings could be used as novel coatings in commercial treatments for maintaining the quality of button mushrooms during a long-term storage period.