Structural characterization, antioxidant and antibacterial activities of a novel water soluble polysaccharide from Cordi
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ORIGINAL PAPER
Structural characterization, antioxidant and antibacterial activities of a novel water soluble polysaccharide from Cordia myxa fruits Mohammad Hojjati1 · Fatemeh Beirami‑Serizkani1 Received: 1 July 2020 / Accepted: 27 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this study, water-soluble polysaccharide and fatty acids of Cordia myxa fruit harvested from the southwest of Iran were isolated and investigated. The extraction yield of water-soluble polysaccharide of C. myxa fruit (WSPCM) was 24.12%, and its experimental purity was 79.43%. The High Performance Liquid Chromatography results indicated that the WSPCM consisted of glucose, fructose, sucrose, maltose, ribose, maltitol, and maltoheptaose. The atomic absorption spectrometer analysis indicated that WSPCM was a rich source of Ca and Na. The dynamic light scattering results illustrated that the average particle size and zeta potential were 1510.7 nm and − 64.96, respectively. Fourier transform infrared spectroscopy revealed the presence of α and β-configurations in WSPCM. The total unsaturated and saturated fatty acids were 60.62% and 39.38%, respectively and oleic, palmitic, and linoleic were the main fatty acids. The WSPCM represented good antibacterial activities against both Gram-positive and Gram-negative pathogenic bacteria. Moreover, it showed a relatively good antioxidant activity. In conclusion, WSPCM could be introduced as a novel natural antioxidant and antibacterial substance in functional food. Keywords Polysaccharide · HPLC · Fatty acids · FTIR · GC
Introduction Cordia myxa is a genus of the deciduous tree belongs to family Boraginaceae. The Cordia genus, which has over 300 species worldwide, is mostly in tropical regions of the world and is widely distributed in the eastern Mediterranean region to eastern India, tropical Asia, and tropical Africa (Fig. 1) [1, 2]. Based on previous studies, many species of the genus Cordia are a rich source of phytoconstituents such as phenolics, flavonoids, terpenoids, and cerebrosides and have medicinal properties like treatment of the boils, wound, and gout [2, 3]. It is well established that the Cordia species are also applied as a blood purifier and febrifuge [3]. It has been observed that fruits and other parts of different species of Cordia have a wide range of pharmacological activities [2–5]. For instance, anti-inflammatory [4, 5] and analgesic [5] compounds have been reported in the C. myxa fruits. Its * Mohammad Hojjati [email protected] 1
Department of Food Science and Technology, Agricultural Sciences and Natural Resources University of Khuzestan, Ahvaz, Iran
effect against liver fibrosis and alcoholic liver cirrhosis has also been reported due to its strong antioxidant properties [6, 7]. It has been reported that the gum and mucilage isolated from C. myxa fruits have strong radical scavenging activities [8, 9] and recommended as an edible coating to extend the shelf life of fruits [10]. Apart from these, different fatty acids we
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