PMID- 30593815 OWN - NLM STAT- MEDLINE DCOM- 20190531 LR - 20190531 IS - 1879-0003 (Electronic) IS - 0141-8130 (Linking) VI - 126 DP - 2019 Apr 1 TI - Ultrasonic-assisted enzymatic extraction and characterization of polysaccharides from dandelion (Taraxacum officinale) leaves. PG - 846-856 LID - S0141-8130(18)34764-0 [pii] LID - 10.1016/j.ijbiomac.2018.12.232 [doi] AB - Ultrasonic-assisted enzymatic extraction (UAEE) technology was employed to extract the polysaccharides from dandelion leaves (DLP). The extraction conditions were optimized by response surface method (RSM) and Box-Behnken design (BBD). The polysaccharide yield (14.05 +/- 0.95%), which well matched with the predicted value of 14.27%, was obtained under the optimum parameters: ultrasound power 500 W, ultrasound time 42 min, cellulase amount 4.90%, and particle size 80 mesh. After purification by AB-8 Macroporous Resin and Sephadex G-100 column, a novel polysaccharide (DLP-I) was isolated and its molecular weight was estimated to be 87,000 g/mol by high performance liquid chromatography (HPLC). Gas chromatography (GC) analysis showed that DLP-I was composed of rhamnose, arabinose, mannose, galactose and glucose in the molar ratio of 1.14:1.00:1.05:4.76:1.52. 1D and 2D NMR spectra confirmed that the backbone of DLP-I was mainly consisted of -->4)-alpha-D-Galp-(1-->, -->4)-beta-D-Manp-(1-->, -->4)-alpha-D-Glcp-(1-->, -->2,4)-alpha-L-Rhap-(1-->, and alpha-L-Araf-(1--> with branching at O-2 and O-4 of -->2,4)-alpha-L-Rhap-(1-->. In addition, the digestion results showed DLP-I could keep its stability during the simulated digestive juices. CI - Copyright (c) 2019 Elsevier B.V. All rights reserved. FAU - Wang, Libo AU - Wang L AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. FAU - Li, Tengfei AU - Li T AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. FAU - Liu, Fangcheng AU - Liu F AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. FAU - Liu, Dawei AU - Liu D AD - College of Agriculture, Northeast Agricultural University, Harbin 150030, People's Republic of China. Electronic address: liudawei@neau.edu.cn. FAU - Xu, Yaqin AU - Xu Y AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. FAU - Yang, Yu AU - Yang Y AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. FAU - Zhao, Yanbo AU - Zhao Y AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. FAU - Wei, He AU - Wei H AD - College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China. LA - eng PT - Journal Article DEP - 20181226 PL - Netherlands TA - Int J Biol Macromol JT - International journal of biological macromolecules JID - 7909578 RN - 0 (Polysaccharides) SB - IM MH - Analysis of Variance MH - Magnetic Resonance Spectroscopy MH - Particle Size MH - Plant Leaves/*chemistry MH - Polysaccharides/chemistry/*isolation & purification MH - Spectroscopy, Fourier Transform Infrared MH - Taraxacum/*chemistry MH - Time Factors MH - Ultrasonics/*methods OTO - NOTNLM OT - Dandelion OT - Polysaccharides OT - Simulated digestion OT - Structural characterization OT - Ultrasonic-assisted enzymatic extraction EDAT- 2018/12/30 06:00 MHDA- 2019/06/01 06:00 CRDT- 2018/12/30 06:00 PHST- 2018/09/07 00:00 [received] PHST- 2018/12/18 00:00 [revised] PHST- 2018/12/23 00:00 [accepted] PHST- 2018/12/30 06:00 [pubmed] PHST- 2019/06/01 06:00 [medline] PHST- 2018/12/30 06:00 [entrez] AID - S0141-8130(18)34764-0 [pii] AID - 10.1016/j.ijbiomac.2018.12.232 [doi] PST - ppublish SO - Int J Biol Macromol. 2019 Apr 1;126:846-856. doi: 10.1016/j.ijbiomac.2018.12.232. Epub 2018 Dec 26.