Browsing by Author "Tomas, Merve"

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Chemical composition, nutritional and health related properties of the medlar (Mespilus germanica L.): from medieval glory to underutilized fruit
(Springer, 2023-06-30) Popovic-Djordjevic, Jelena; Kostic, Aleksandar Z.; Kamiloğlu, Senem; Tomas, Merve; Micanovic, Nenad; Capanoğlu, Esra; KAMİLOĞLU BEŞTEPE, SENEM; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Bilim ve Teknoloji Uygulama ve Araştırma Merkezi (BİTUAM).; 0000-0003-3902-4360 ; P-3633-2018
The common medlar (Mespilus germanica L.) is one of two species within the Mespilus genus (Maloideae subfamily). Its use can be traced back almost 30 centuries, from ancient Assyrians and Babylonians to Greeks and Romans and through modern times. During the Middle Ages it was a popular fruit tree and a highly appreciated ornamental tree in gardens across Europe. However, in modern times, the medlar is often considered an underestimated and underutilized fruit from the Rosaceae family. Nevertheless, it is slowly regaining its 'medieval glory' and commercial importance as a foodstuff for human consumption. The medlar plant has a wide array of traditional uses in both gastronomy and medicine. Ripe medlar fruits can be consumed fresh or processed into different products such as juice, concentrate, jam, cheese, leather, and honey. Mean-while, unripe fruits can be used to prepare pickles or beverages such as cider. The nutritional potential of medlar fruits is attributed to sugars, organic acids, fatty acids, carotenoids, amino acids and proteins, vitamins, and essential elements. Scarce literature describes the richness of medlar fruit in bioactive phenolic compounds such as flavonoids and phenolic acids, which contribute to its antioxidant and antidiabetic properties. Additionally, a few studies describe other biological properties of the medlar plant including antimicrobial, cytotoxic and neurodegenerative effects of medlar fruits and leaves, while reports on the clinical studies are lacking. This review paper summarizes the chemical and nutritional properties of medlar fruit, traditional medicinal uses and biological activity of the medlar plant, relying on the most relevant and up to date scientific literature in the field.[GRAPHICS].
Effect of food matrix on the content and bioavailability of flavonoids
(Elsevier Science London, 2021-11) Tomas, Merve; Özdal, Tuğba; Çapanoğlu, Esra; Kamiloğlu, Senem; Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü; 0000-0003-3902-4360; P-3633-2018; 55754670700
Background:Dietary flavonoids have drawn great interest owing to their potential positive effects on health, which considerably rely on their bioaccessibility, transport and further metabolism in the body. One of the key parameters that influence the flavonoid bioavailability is the interaction of these compounds with other nutrients present in the human diet. Scope and Approach:This review highlights the current findings on the influence of co-ingestion of flavonoids with other macro- (carbohydrates, lipids and proteins) and micro-constituents (vitamins, minerals, and other micronutrients) in foods. Key Findings and Conclusions:Majority of both in vitro and in vivo studies in the literature suggest that proteins, dietary fiber, and minerals may induce disadvantageous impact on the bioavailability of flavonoids. On the other hand, lipids, digestible carbohydrates, vitamins, alkaloids, carotenoids and other flavonoids are likely to improve flavonoid bioavailability. Nevertheless, interaction of flavonoids with food matrix components is a complicated parameter that needs to be explored further in order to ensure utmost positive health effects to humans.
Oil matrix modulates the bioaccessibility of polyphenols: A study of salad dressing formulation with industrial broccoli by-products and lemon juice
(Wiley, 2022-04-08) Kamiloğlu, Senem; Özdal, Tuğba; Tomas, Merve; Capanoğlu, Esra; KAMİLOĞLU BEŞTEPE, SENEM; Bursa Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Bilim ve Teknoloji Uygulama ve Araştırma Merkezi (BİTUAM).; 0000-0003-3902-4360 ; P-3633-2018
BACKGROUND The potential health-promoting effects of polyphenols depend considerably on their bioaccessibility, which is affected by the presence of other nutrients in the diet, including lipids. In this study, several salad dressing formulations were prepared using industrial broccoli by-product powder (BBP), lemon juice (LJ), and three different sources of oils (olive oil, hazelnut oil and sunflower oil) to both valorize polyphenol-rich industrial discards and also to investigate polyphenol bioaccessibility. The changes in the bioaccessibility of polyphenols from BBP and LJ were determined using the standardized in vitro digestion model. RESULTS Four groups of polyphenols (hydroxycinnamic acids, flavonols, flavones, and flavonones) were detected in BBP and LJ. The bioaccessibility of hydroxycinnamic acids and flavonols from BBP increased significantly in the presence of LJ and oils (0.3- to 5.8-fold), whereas there was no significant difference between formulations containing different oil types. On the other hand, the bioaccessibility of phenolic acids from LJ did not change notably after co-ingestion with BBP and oils, whereas flavonoids, including vicenin-2 and hesperidin, were found to be significantly more bioaccessible when LJ was co-ingested with BBP and oils (0.8- to 1.4-fold) (P < 0.05). CONCLUSION Overall, the current study highlighted that the bioaccessibility of polyphenols from BBP and LJ was modulated in the presence of an oil matrix. (c) 2022 Society of Chemical Industry.