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    Antioxidant Properties, Oxidative Stability, and Fatty Acid Profile of Pitaya Fruit (Hylocereus polyrhizus and Hylocereus undatus) Seeds Cultivated in Turkey
    (North Carolina State Univ Dept Wood & Paper Sci, 2023) Unver, Ahmet
    Pitaya is a tropical fruit from a newly cultivated plant in Turkey that has increasing economic value. In this study, its seed properties were investigated. Pitaya fruit samples used in the research were obtained from local producers in the Gazipasa/Antalya region. The dry matter, protein, oil, and ash content of H. polyrhizus and H. undatus pitaya seeds were 89.7% to 89.1%, 19.8% to 17.5%, 22.8% to 24.0%, and 2.8% to 4.09%, respectively. The oil and protein contents of the seeds were very high. The total phenolic content, a-tocopherol content, alpha-tocopherol content, free radical scavenging activity, and induction time of H. polyrhizus and H. undatus pitaya seeds were 12.8 to 11.9 mg GAE/g dry sample, 3.67 to 2.75 g/kg oil, 1.29, 1.64 g/kg oil, 46.9% to 51.5%, and 5.37 to 5.07 h, respectively. Seeds contained significant amounts of phenolic compounds and tocopherols, which play an important role in increasing oxidative stability. The percent inhibition of DPPH indicated that pitaya seeds may be evaluated as an antioxidant source. Unsaturated fatty acids were high in seed oils of both pitaya species. Linoleic acid, a polyunsaturated fatty acid, was dominant in both pitaya species. The chemical properties of the seeds were similar to those of species grown in tropical countries. Future studies should investigate other pitaya species grown in Turkey.
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    Antioxidant Properties, Oxidative Stability, and Fatty Acid Profile of Pitaya Fruit (Hylocereus polyrhizus and Hylocereus undatus) Seeds Cultivated in Turkey
    (North Carolina State Univ Dept Wood & Paper Sci, 2023) Unver, Ahmet
    Pitaya is a tropical fruit from a newly cultivated plant in Turkey that has increasing economic value. In this study, its seed properties were investigated. Pitaya fruit samples used in the research were obtained from local producers in the Gazipasa/Antalya region. The dry matter, protein, oil, and ash content of H. polyrhizus and H. undatus pitaya seeds were 89.7% to 89.1%, 19.8% to 17.5%, 22.8% to 24.0%, and 2.8% to 4.09%, respectively. The oil and protein contents of the seeds were very high. The total phenolic content, a-tocopherol content, alpha-tocopherol content, free radical scavenging activity, and induction time of H. polyrhizus and H. undatus pitaya seeds were 12.8 to 11.9 mg GAE/g dry sample, 3.67 to 2.75 g/kg oil, 1.29, 1.64 g/kg oil, 46.9% to 51.5%, and 5.37 to 5.07 h, respectively. Seeds contained significant amounts of phenolic compounds and tocopherols, which play an important role in increasing oxidative stability. The percent inhibition of DPPH indicated that pitaya seeds may be evaluated as an antioxidant source. Unsaturated fatty acids were high in seed oils of both pitaya species. Linoleic acid, a polyunsaturated fatty acid, was dominant in both pitaya species. The chemical properties of the seeds were similar to those of species grown in tropical countries. Future studies should investigate other pitaya species grown in Turkey.
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    Determination of total phenol content, antibacterial activity and free radical scavenging activity of some Bupleurum species
    (Elsevier Science Bv, 2016) Saracoglu, Hatice Taner; Unver, Ahmet; Akin, Mehtap
    [Abstract Not Availabe]
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    Dietary Fibers of Tree Nuts Differ in Composition and Distinctly Impact the Fecal Microbiota and Metabolic Outcomes In Vitro
    (Amer Chemical Soc, 2023) Sahin, Merve; Arioglu-Tuncil, Seda; Unver, Ahmet; Deemer, Dane; Lindemann, Stephen R.; Tuncil, Yunus E.
    This study aimed to evaluate and compare the effectsof dietaryfibers (DFs) of commercially important tree nuts (almond, cashew,hazelnut, pistachio, and walnut) on gut microbiota in vitro. Microbial compositions and short-chain fatty acids were determinedusing 16S rRNA sequencing and gas chromatography (GC), respectively.Neutral and acidic monosaccharides were analyzed using GC/MS and spectrophotometry,respectively. Our results revealed that cashew fibers exhibit higherbutyrate formation compared to others. Accordingly, cashew fiber promotedbutyric acid-producing bacteria-related operational taxonomic units(OTUs; Butyricimonas and Collinsella) at higher relative abundances. The higher butyrogenic capacityof cashew fiber is mainly attributed to its higher soluble/total DFratio and remarkably distinct monosaccharide composition. Additionally,nut fibers stimulated family Lachnospiraceae- and Ruminococcaceae-related OTUs. These findings show that althoughthe degree of promotion is nut type-dependent, nut fibers are generallycapable of promoting beneficial microbes in the colon, further suggestingthat DFs of tree nuts are contributing factors to their health-promotingeffects.
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    Mineral Content of Pitaya (Hylocereus polyrhizus and Hylocereus undatus) Seeds Grown in Turkey
    (Springer, 2021) Nizamlioglu, Nizam Mustafa; Unver, Ahmet; Kadakal, Cetin
    Pitaya is one of the most produced tropical fruits in Turkey because of its high economic value. Seeds of this fruit consumed with fruit are an important source due to nutritional and health benefits. In this study mineral and ash content of pitaya seeds were investigated. The research was carried out with two different species of pitaya, Hylocereus undatus (H. undatus) and Hylocereus polyrhizus (H. polyrhizus), which have red shell. H. undatus has a white pulp color while H. Polyrhizus has a red. The ash content of H. polyrhizus and H. undatus pitaya seeds was 2.78% and 4.09%, respectively. The main minerals detected in H. polyrhizus and H. undatus pitaya species were potassium (36.47 mg/kg and 31.99 mg/kg), magnesium (9.15 mg/kg and 9.16 mg/kg), phosphorus (8.99 mg/kg and 8.08 mg/kg), sulphur (6.11 mg/kg and 5.48 mg/kg) and calcium (2.17 mg/kg and 1.90 mg/kg). Mineral content of seeds of H. polyrhizus and H. undatus species were found similar to the pitaya species grown in different tropical countries.