دانلود رایگان مقاله لاتین ساختار سه پلی ساکارید از سایت الزویر
عنوان فارسی مقاله:
توضیح ساختاری سه پلی ساکارید آنتی اکسیدانی از قارچ کرکیلبه lobayense
عنوان انگلیسی مقاله:
Structural elucidation of three antioxidative polysaccharides from Tricholoma lobayense
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Mushrooms, famous edible fungi for their delicacy, have many nutritious and medical values (Chang & Buswell, 1996; Wasser, 2002). Polysaccharides from mushrooms not only play an important role in the growth and development of living organisms but also possess diverse biological properties, including antioxidant, antitumor, antibacterial and immunomodulatory activities (Chang et al., 2015; Giavasis, 2014; Li, Wang, Wang, Walid, & Zhang, 2012; Villares, Mateo-Vivaracho, & Guillamón, 2012; Zhang, Cui, Cheung, & Wang, 2007). Nowadays, the application of polysaccharides as food additives has drawn more and more attentions in food industry (Xu, Xu, & Zhang, 2012). In most cases, functions are closely related to polysaccharides’ structural properties, such as linkage type, branch degree, tertiary structure, and molecular weight (Chen, Xiao, Wang, Fang, & Ding, 2012; Wang et al., 2014; Xu, Dong, Cong, & Ding, 2010; Zhu et al., 2013). For example polysaccharide PL-3 from Ganoderma lucidum which consists of 1,3-linked ˇ-d-glucopyranosyl units could enhance the prolifera-tion of T-type and B-type lymphocytes in vitro, whereas PL-1 which has a backbone of 1,4-linked -d-glucopyranosyl and 1,6-linked ˇ-d-galactopyranosyl exhibits an immune-stimulating activity in mice (Bao, Wang, Dong, Fang, & Li, 2002). 1,3-ˇ-d-Glucan from Ganoderma lucidum possesses an excellent antioxidant capability against H2O2-induced cell death by attenuating intracellular ROS and inhibiting SMase activity, which might be attributed to its low molecular weight. (Kao et al., 2012). Tricholoma lobayense is a nutritious and precious edible mushroom, which was discovered in Africa and named by French mycologists in 1970. The unique flavor, taste and health-beneficial effect make it popular among Africa and Asia (Weng et al., 2013). Previously, three polysaccharides (TLH-1, TLH-2 and TLH- 3) were successfully isolated from the fruiting bodies of Tricholoma lobayense in our lab (Liu, Lu, et al., 2015). Antioxidant activity studies revealed that polysaccharide TLH-3 could scavenge superoxide radicals in vitro much more effectively than TLH-1 and TLH-2. Furthermore, the scavenging capacity of TLH-3 was comparable to that of ascorbic acid (Wang et al., 2012), a commercially available antioxidant. However, the origin of this excellent antioxidant activity is not known yet. In order to demonstrate the reason responsible for the antioxidant activities of the three polysaccharides from Tricholoma lobayense, high performance liquid chromatography (HPLC), methylation analysis, 1D (1H, 13C) and 2D (COSY, HMQC and HMBC)NMR spectroscopy were used for the structure characterization. Structure features including physicochemical properties, monosaccharide composition, glycosidic bonds and chain conformations were elucidated. Furthermore, antioxidant activities were examined by DPPH, superoxide, hydroxyl and ABTS radicals scavenging assays. The results were analyzed and compared to clarify the structure-activity relationship.
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کلمات کلیدی:
Structural elucidation of three antioxidative polysaccharides ... - ISI-dl isi-dl.com/item/125511 Toggle navigation logo. Free Journal Paper Download. Sources ?? acm.org · acs.org · aiaa.org · aip.org · ajhp.org · ajnr.org · ajronline.org · ajsonline.org · ajtmh. Structural elucidation of polysaccharide containing 3-O-methyl ... www-heparin.rpi.edu/main/files/papers/57d2d16fa04219.59445876.pdf by P He - 2016 - Related articles Aug 28, 2016 - Structural elucidation of polysaccharide containing 3-O-methyl galactose from ... including antioxidation [3], antihypertension [4], immunomodu-. Structure Elucidation of a Polysaccharide from Umbilicaria esculenta ... journals.plos.org/plosone/article?id=10.1371/journal.pone.0168472 by BW Zhang - 2016 - Related articles Dec 20, 2016 - Gas chromatography analysis indicated that UP2 contained three ... Elucidation of a Polysaccharide from Umbilicaria esculenta and Its ... immune-enhancement, anti-tumor, antioxidant, and other biological activities [8–9]. Structural Elucidation and Antioxidant Activity of a Polysaccharide from ... https://www.omicsonline.org/.../structural-elucidation-and-antioxidant-activity-of-a-p... Three polysaccharide fractions were detected after purification process, which ... was used for the further structure elucidation and antioxidant activity assay. Polysaccharides: Natural Fibers in Food and Nutrition https://books.google.com/books?isbn=1466571829 Noureddine Benkeblia - 2014 - Medical Structure elucidation and antioxidant activity of a novel polysaccharide isolated ... Rheological properties of aqueous solutions of (1–3)(1–4)-beta-d-glucan from ... Characterization of Polysaccharides with Antioxidant and ... pubs.acs.org/doi/abs/10.1021/jf502632c by Q Liu - 2014 - Cited by 26 - Related articles Aug 6, 2014 - Isolation, characterization and bioactivities of the polysaccharides from ... Structural elucidation of three antioxidative polysaccharides from ... Antioxidant Polymers: Synthesis, Properties, and Applications https://books.google.com/books?isbn=1118445511 Giuseppe Cirillo, Francesca Iemma - 2012 - Technology & Engineering 8.2.3. Marine. Uronic. Acid-containing. Polysaccharides. Some polyanionic polymers ... Besides, Tusi et al. has elucidated that alginate oligosaccharides could ...
