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    In-vitro Antioxidant Activities of the Ethanolic Extracts of Some Contained-Allantoin Plants
    (Shaheed Beheshti Univ, Sch Pharmacy, 2017) Selamoglu, Zeliha; Dusgun, Cihan; Akgul, Hasan; Gulhan, Mehmet Fuat
    It has been investigated the in-vitro antioxidant properties of ethanol extracts of the containedallantoin plants in this study. Contained-allantoined plant samples Plantago lanceolata, Plantago major, Robinia pseudoacacia, Platanus orientalis and Aesculus hippocastanum were tested at different concentrations. The antioxidant activities of plant samples were analysed by 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method, cupric reducing antioxidant capacity (CUPRAC), reducing power assay and beta-carotene bleaching method. Plantago major plant showed the highest antioxidant capacity compared to other plant extracts in results of the in-vitro assays including 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method with 90.25 %, cupric reducing antioxidant capacity (CUPRAC) with 1.789 %, reducing power assay (FRAP) with 1.321 % and beta-carotene bleaching method with 78.01 % in 1 mg/mL. The lowest antioxidant activity was determined in Robinia pseudoacacia plant. In conclusion, allantoin shows antioxidant properties and it has the positive effect on total antioxidant capacity.
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    Physico-chemical and microbiological properties of water kefir produced from carob (Ceratonia siliqua L.) sherbet
    (Korean Society Food Science & Technology-Kosfost, 2024) Gulhan, Mehmet Fuat; Gulhan, Ayca; Dusgun, Cihan
    In this study, sugar-free (A) and sugar-added (B) formulations of carob sherbet were fermented with water kefir grains. After 48 h of fermentation, the pH and total soluble solid content level (TSS) of A and B decreased, while the titratable acidity (TA) value increased. At the end of fermentation, Ave B formulations were stored at 4 degrees C for 28 days. Fermented sherbets' 2,2 '-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity decreased with storage. A had 75.3% DPPH radical scavenging activity on day 0th, whereas B had 77.0%. B had less total phenolic content (TPC) than fermented A on day 0. TPC values decreased significantly, notably on days 21st and 28th of storage. After fermentation, A had more gallic acid, hesperidin, p-coumaric acid, rosmarinic acid, and syringic acid than B. A had 2.21% sucrose before fermentation and 0.95% after. On 14th days of storage, potassium and calcium had the greatest mineral levels. Compared to A, B gave higher microbial count values (Lactobacillus sp., Lactococcus sp. total mesophilic aerobic bacteria, and yeast) in the microbiological analysis results at the end of fermentation and during storage.