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Article

Effect of Various Temperatures on Bletillae Rhizoma Polysaccharide Extraction and Physicochemical Properties

School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
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Appl. Sci. 2019, 9(1), 116; https://doi.org/10.3390/app9010116
Received: 18 October 2018 / Revised: 16 December 2018 / Accepted: 22 December 2018 / Published: 30 December 2018
(This article belongs to the Section Chemical and Molecular Sciences)
Six fractional polysaccharides were prepared by water extraction and alcohol precipitation under controlled temperature from bletillae rhizoma, a traditional Chinese medicine. Based on this, yields of bletillae rhizome polysaccharides (RBPs) were obtained. The extracting temperature impacted the characteristics of the fractional polysaccharides. The fractional polysaccharides were characterized by glucomannan (GM) content, thermal stability, scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, gel permeation chromatography (GPC), and x-ray diffraction (XRD). For the analysis, 2.0% w/v dispersions of the six fractional polysaccharides were prepared and their flow behaviors were evaluated using a rotational rheometer. The results showed that increased extraction temperature led to increased GM extraction yields and extraction rate, but GM content was relative stable (over 90%). The average molecular weight (Mw) of fractional polysaccharides obtained at 30, 40, 50, 60, 70, and 80 °C was 3.598 × 104, 4.188 × 104, 8.632 × 104, 8.850 × 104, 2.372 × 105, and 3.081 × 105 g/mol, respectively. SEM revealed that fractional polysaccharides had a porous structure of different sizes and densities. Thermal analysis, FTIR, and XRD results indicated that extraction temperature affects the structure and moisture content of fractional polysaccharides. All results showed that the extraction temperature has an obvious impact on the morphology, molecular weight, and polydispersity of the RBPs. This simple process is a promising method for the preparation of fractional polysaccharides. View Full-Text
Keywords: bletillae rhizome; fractional polysaccharides; molecular weight; temperature bletillae rhizome; fractional polysaccharides; molecular weight; temperature
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MDPI and ACS Style

Long, X.; Yan, Q.; Peng, L.; Liu, X.; Luo, X. Effect of Various Temperatures on Bletillae Rhizoma Polysaccharide Extraction and Physicochemical Properties. Appl. Sci. 2019, 9, 116. https://doi.org/10.3390/app9010116

AMA Style

Long X, Yan Q, Peng L, Liu X, Luo X. Effect of Various Temperatures on Bletillae Rhizoma Polysaccharide Extraction and Physicochemical Properties. Applied Sciences. 2019; 9(1):116. https://doi.org/10.3390/app9010116

Chicago/Turabian Style

Long, Xiaoyan, Quan Yan, Linwei Peng, Xinyue Liu, and Xuegang Luo. 2019. "Effect of Various Temperatures on Bletillae Rhizoma Polysaccharide Extraction and Physicochemical Properties" Applied Sciences 9, no. 1: 116. https://doi.org/10.3390/app9010116

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