Extractions and rheological properties of polysaccharide from okra pulp under mild conditions

Autor: Yinping Li, Yan Mingyan, Jinling Cui, Wang Xinyu, Wang Xinxin, Wang Xishuang, Xinyao Lv
Rok vydání: 2020
Předmět:
Sucrose
genetic structures
Liquid-Liquid Extraction
02 engineering and technology
Chemical Fractionation
engineering.material
Polysaccharide
behavioral disciplines and activities
Biochemistry
law.invention
03 medical and health sciences
chemistry.chemical_compound
Magazine
Rheology
Abelmoschus
Polysaccharides
Structural Biology
law
Spectroscopy
Fourier Transform Infrared
Molecular Biology
Chromatography
High Pressure Liquid
030304 developmental biology
chemistry.chemical_classification
0303 health sciences
Shear thinning
Viscosity
urogenital system
Chemistry
Pulp (paper)
Monosaccharides
Temperature
General Medicine
Hydrogen-Ion Concentration
Apparent viscosity
021001 nanoscience & nanotechnology
Elasticity
Molecular Weight
body regions
Galactose
engineering
0210 nano-technology
psychological phenomena and processes
Nuclear chemistry
Zdroj: International Journal of Biological Macromolecules. 148:510-517
ISSN: 0141-8130
DOI: 10.1016/j.ijbiomac.2020.01.163
Popis: This study investigated the extraction of polysaccharide from okra pulp (POP), its chemical components, and rheological properties. The results showed that the optimal extraction temperature, time, and the ration of water to material were 20–30 °C, 30 mins, and 150, respectively, giving a maximum yield of 29.4%. The POP extracted under the mild condition showed different properties. The molecular weight of POP varied from 6436 kDa to 7432 kDa. The GalA/Rha and Gal/Rha in POP suggests the domain of rhamnogalacturonan I with long galactose side chains. The POP presented pseudoplastic shear-thinning behavior, which can be described by the Ostward-DeWaele model. The apparent viscosity of POP decreased with temperature rising from 25 °C to 80 °C. In addition, sucrose, CaCl2, and NaCl led to the reduction of its apparent viscosity which was more sensitive to Ca2+ than to Na+ and sucrose. A closed hysteresis loop was obtained when the POP concentration reached to 6 g/L. The POP showed an elastic behavior (G′ > G″) at concentration of 6 g/L, while it showed predominantly viscous response (G′
Databáze: OpenAIRE
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