Effect of drying pretreatment methods on structure and properties of pectins extracted from Chinese quince fruit

Qin, Zhao; Liu, Hua‐Min; Cheng, Xi-Chuang; Wang, Xuede

doi:10.1016/j.ijbiomac.2019.06.209

Cited by 65 publications

(25 citation statements)

References 42 publications

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“…Liquid held within the sample was considered as consisting of two parts: (a) liquid held between fibers (W0 − W1 for WHC) and (W2 − W3 for WAC) and (b) liquid held inside the individual fibers (W1 − W4 for WHC) and (W3 − W4 for WAC). The corresponding W4-normalized parameters (W0 − W1)/W4; (W2 − W3)/W4; (W1 − W4)/W4; and (W3 − W4)/W4, were used to characterize and compare the dressing materials in a way similar to those applied by Qin et al [33]. The ratios (W0 − W1)/(W1 − W4) and (W2 − W3)/(W3 − W4) reflecting the distribution of liquid in the sample of native and dried sun gel film were also evaluated.…”

Section: Water-holding Characteristics Of the Bc Materialsmentioning

confidence: 99%

Bacterial Cellulose Nanocomposites: Morphology and Mechanical Properties

et al. 2020

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Bacterial cellulose (BC) is a promising material for biomedical applications due to its unique properties such as high mechanical strength and biocompatibility. This article describes the microbiological synthesis, modification, and characterization of the obtained BC-nanocomposites originating from symbiotic consortium Medusomyces gisevii. Two BC-modifications have been obtained: BC-Ag and BC-calcium phosphate (BC-Ca3(PO4)2). Structure and physicochemical properties of the BC and its modifications were investigated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), and infrared Fourier spectroscopy as well as by measurements of mechanical and water holding/absorbing capacities. Topographic analysis of the surface revealed multicomponent thick fibrils (150–160 nm in diameter and about 15 µm in length) constituted by 50–60 nm nanofibrils weaved into a left-hand helix. Distinctive features of Ca-phosphate-modified BC samples were (a) the presence of 500–700 nm entanglements and (b) inclusions of Ca3(PO4)2 crystals. The samples impregnated with Ag nanoparticles exhibited numerous roundish inclusions, about 110 nm in diameter. The boundaries between the organic and inorganic phases were very distinct in both cases. The Ag-modified samples also showed a prominent waving pattern in the packing of nanofibrils. The obtained BC gel films possessed water-holding capacity of about 62.35 g/g. However, the dried (to a constant mass) BC-films later exhibited a low water absorption capacity (3.82 g/g). It was found that decellularized BC samples had 2.4 times larger Young’s modulus and 2.2 times greater tensile strength as compared to dehydrated native BC films. We presume that this was caused by molecular compaction of the BC structure.

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Section: Water-holding Characteristics Of the Bc Materialsmentioning

confidence: 99%

Bacterial Cellulose Nanocomposites: Morphology and Mechanical Properties

et al. 2020

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“…This phenomenon could be attributed to more exposure of hydrophobic groups resulting from the cross-linking interactions and connected polysaccharide chains. 46 Qin et al 47 extracted pectin from sun-dried, lyophilized, subcritical dimethyl ether dewatered and fresh fruits, and ascribed the higher oil holding capacity of the pectin samples to the porosity and greater content of proteins with hydrophobic side chains in the pectin molecules.…”

Section: Aerogel Morphologymentioning

confidence: 99%

Fabrication of Oleogels via a Facile Method by Oil Absorption in the Aerogel Templates of Protein–Polysaccharide Conjugates

Chen

Zhang

2020

ACS Appl. Mater. Interfaces

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In this study, a novel and facile method was developed to fabricate oleogels. The alginate/soy protein conjugates with excellent emulsifying activity and emulsion stability were prepared via Maillard reaction and freeze-dried to form the aerogel templates, which were then immersed in corn oil within 6 h to induce the oleogels. Compared with the alginate and soy protein solutions, the viscosity and elastic modulus G′ of the conjugate solutions increased, indicating the formation of a new macromolecule and strengthened gel network from Maillard reaction. The conjugate aerogels presented the morphology of serious aggregation and conglutination but the higher elastic modulus and better thermal stability, due to the increasing covalent interactions. These aerogel templates showed a good oil absorption of up to 10.89 g/g aerogel and holding capacity of 40%. The resulting oleogels loaded with thymol showed excellent antimicrobial activities against Staphylococcus aureus and Escherichia coli. This work suggests that the fabrication of oleogels is not limited to the choice of existing oleogelators but from a wide variety of protein–polysaccharide conjugates to form the aerogel templates for oil absorption.

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“…Thermal stability was determined according to the previous study (25). The samples (about 10 mg) were weighed and placed in a NETZSCH STA-449C thermal gravimetric analyzer and then heated at a rate of 10 • C /min from 45 • C to 700 • C with stable nitrogen flow at 50 mL/min.…”

Section: Thermal Measurementsmentioning

confidence: 99%

Characterization of Structure and Antioxidant Activity of Polysaccharides From Sesame Seed Hull

et al. 2022

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Sesame seed hull is the major by-product of sesame seed processing and is rich in polysaccharides. In this work, sesame hull polysaccharides (SHP) were extracted by ultrasound-assisted alkali extraction methods with a yield of 6.49%. Three purified polysaccharide fractions were obtained after decolorization, deproteinization, and column chromatography. Then, their main composition and antioxidant activity were investigated. The dominant fraction was SHP-2 with a yield of 3.78%. It was composed of galacturonic acid (51.3%), glucuronic acid (13.8%), rhamnose (8.9%), glucose (8.4%), and others. The linkage types of SHP-2 have the α-D-GalpA-(1,4)-linked, α-D-GlcpA-(1,2)-linked, β-T-D-Rhap-linked, β-D-Glcp-(1,6)-linked, β-T-D-Galp-linked, α-L-Xylp-(1,4)-linked, α-L-Araf-(1,3,5)-linked, and β-D-Manp-(1,4)-linked. This study might provide some useful basic data for developing applications for sesame seed hull polysaccharides in the food and pharmaceutical industries.

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Effect of drying pretreatment methods on structure and properties of pectins extracted from Chinese quince fruit

Cited by 65 publications

References 42 publications

Bacterial Cellulose Nanocomposites: Morphology and Mechanical Properties

Bacterial Cellulose Nanocomposites: Morphology and Mechanical Properties

Fabrication of Oleogels via a Facile Method by Oil Absorption in the Aerogel Templates of Protein–Polysaccharide Conjugates

Characterization of Structure and Antioxidant Activity of Polysaccharides From Sesame Seed Hull

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