Comparison of curdlan and its carboxymethylated derivative by means of Rheology, DSC, and AFM

Yang, Jinhua; Zhang, Hongbin; Yin, Yi; Nishinari, Katsuyoshi

doi:10.1016/j.carres.2005.11.003

Cited by 155 publications

(57 citation statements)

References 30 publications

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“…All these bands were also present in composite spectrum. The spectrum of composite showed also the presence of bands characteristic for β-glucan: broad bands in the region of about 3300 cm -1 (-OH vibrations), at 2920 cm -1 (C-H stretching vibration), at 1157 cm -1 and at 888 cm -1 (C 1 -O-C 3 stretching vibration, characteristic for β configuration) [39,40]. A band at 1640 cm -1 suggested trace water in the β-glucan sample.…”

Section: General Characteristics Of Compositementioning

confidence: 99%

Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair

et al. 2013

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Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair IntroductionHydroxyapatite (HAp), especially in a porous form, is appreciated as a bone filler due to its biocompatibility, bioactivity, osteoconductivity, minimal risk of appearance of allergic reactions, lack of carcinogenic properties and lack of sensitivity to sterilization processes [1][2][3]. There are numerous commercially available bone graft materials based on biologic and synthetic HAp, including ProOsteon ® (Interpore Cross International, USA), Endobon (BIOMET Orthopaedics, Switzerland), Cerapatite (Ceraver Osteal, France), Synatite (SBM, France) and others. HAp may serve not only as a bone filler but also as a carrier of active substances: antibiotics, chemiotherapeutics, growth factors, etc. [4][5][6][7][8][9]; it can also be used in composites, as a factor increasing their cytocompatibility, bioactivity, osteoconductivity, adhesion of coatings and compression modulus [10][11][12][13][14]. On the other hand, HAp application is often limited due to its relatively poor resorption and slow replacement by the host bone after implantation, substantially high Young modulus, and low fracture toughness [15,16], although these properties may be improved by addition of elasticity-increasing polymers. It is considered that polymer-ceramic composites reveal superior properties (at least in some aspects) over polymer and ceramic alone [17]. However, most polymers used for bone filler fabrication meet only some of the criteria for implantable materials.Bone replacing material such as ceramics or crushed bone offers an insufficient surgical handiness, especially when the orthopedic surgeon has to handle granules (in case of defects in maxillary bone) or scaffolds (rigid and non-adaptable to the implantation site). Some commercially available biomaterials contain the artificial or natural polymers serving as plasticizing agents and thus significantly reduce this inconvenience. Among them, EasyGraft TM (Degradable Solutions SA, Switzerland), Plexur M and P (Osteotech, USA) and Cerapatite-Collagen (Ceraver Osteal, France) can be listed. EasyGraft TM contains PLGA-coated β-TCP granules which hardens into a compact mass via partial and temporary PLGA dissolution by organic solvent; Plexur M and P are composed of cortical bone and resorbable artificial polymer; Cerapatite-Collagen, made from HAp granules and naturally-derived collagen fibers, becomes elastic after hydration with blood or saline. Bone or ceramic granules and powders may also be turned into a paste using collagen gels (e.g., Tecnoss ® Gel O; Tecnoss, Italy) or fibrin glue [18,19]. However, the natural polymeric compounds used in commercially available composites (collagen, fibrin glue) originate from animal sources; this can be considered as a limiting factor because of the increased risk of transmissible contamination (e.g. viruses) and undesirable immune responses. Thus, the necessity of careful purification of these animal polymers exacts the high price of fin...

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Section: General Characteristics Of Compositementioning

confidence: 99%

Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair

et al. 2013

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“…2,30 The n values (0.30-0.51) of carboxylic curdlan solutions at concentrations exceeding 1.0% (w/v) were considerably lower than those of CMc solutions (0.75-0.86) at higher concentrations (>3.0%, w/v) and similar to those of curdlan suspensions (0.22-0.39). 16 These results show that the carboxylic curdlan solutions are more pronounced as pseudoplastic or shear thinning uids than CMc solutions. In general, k implies the viscous nature of the system.…”

mentioning

confidence: 52%

“…As the shear rate increased, the crossing degree with each other further decreased, as conrmed by the decrease in apparent viscosity. Compared with carboxymethylated curdlan (CMc), 16 the carboxylic curdlan aqueous solutions reported in this work exhibited more pronounced shear thinning behaviors and showed typical characteristics of weak gels. Our result suggested that such rheological feature played an important role in food and cosmetic products since it enhance sensory qualities and ensured a high degree of mixability, pumpability, and pourability during the processing and/or actual use of these products.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the rheological properties of polysaccharides considerably inuence their molecular structures and chain conformations. 8,9 Specically, in recent years, many naturally and synthetically occurring polyanion polysaccharides and their derivatives such as okra pectins, 10 low-methoxyl pectin from sunower head, 11 fucoidan from sea cucumber Apostichopus japonicas, 12 sulphated polysaccharides from chlorophytan seaweeds Ulva fasciata, 13 acidic polysaccharide from boat-fruited sterculia seeds, 14 phosphorylated exopolysaccharide produced by Sporidiobolus pararoseus JD-2, 15 carboxymethyl curdlan, 16 carboxymethyl guar gum, 17 have been employed as gelling agents, thickeners, and emulsiers owing to their unique rheological properties under various conditions. Therefore, to explore and facilitate industrial applications in food, medicine, and cosmetics, researchers should focus on searching for new sources of food hydrocolloids with greater efficiency and economy from natural or chemically synthesized polysaccharides and their derivatives.…”

Section: Introductionmentioning

confidence: 99%

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Rheological properties of a β-1,3-polyglucuronic acid derivative from 4-acetamido-TEMPO-mediated oxidation of curdlan

Yan

Qiu

et al. 2017

RSC Adv.

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The rheological properties of a carboxylic curdlan bearing a b-1,3-polyglucuronic acid structure were investigated as a function of concentration and temperature. Carboxylic curdlan solutions exhibited shear thinning behavior that became more evident with increasing concentration. This behavior was further described by a consistent index (k) and a flow behavior index (n) based on the power law model.Activation energy (E a ) decreased with increasing concentration, as calculated by the Arrhenius rule. The mechanical spectra of carboxylic curdlan were classified as dilute solution (<1.0%, w/v), entanglement network (2.0%, w/v), and weak gel (4.0%, w/v or above) according to frequency sweep, complex viscosity h*, and tan d results. Moreover, changes in the storage modulus (G 0 ) and the loss modulus (G 00 ) were found to be dependent on frequency and concentration. This finding suggested that carboxylic curdlan could be explored as a potential thickener or stabilizer for various applications in the food industry.

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“…Although the FT-IR spectra of pectins exhibited similarities in transmittence patterns, there were some attractive differences. The high intensities of the transmittence of the symmetrical carboxyl ion (COO -) stretching vibration (1415 cm -1 ) (Jin et al, 2006) were observed in P W , P O and P OH , while the intensity of P H was relatively low. In addition, the intensities of the ester carbonyl (C=O) groups (1740 cm -1 ) (Kamnev et al, 1998) were weak for P W , P O and P OH , while high intensity of the ester carbonyl were observed for P H .…”

Section: Resultsmentioning

confidence: 99%

Comparison of Pectins from the Alcohol-insoluble Residue of Japanese Pepper (Zanthoxylum piperitum DC.) Fruit, a Major By-product of Antioxidant Extraction

Yamazaki

Fujiwara

Kurita

et al. 2008

FSTR

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Alcohol insoluble residue of Japanese pepper fruit (Zanthoxylum piperitum DC.) is an underutilized by-product of antioxidants extraction. The content of the residue was 77.7 g/100 g dry material and the major component was sugars (57.3 g/100 g AIR). In addition, approximately one-fifth of total sugars were uronic acid. In this study, pectins were extracted from the by-product by sequential extraction with various reagents, and the chemical compositions of the pectins were then compared. As a result of the compositional analysis, Fourier transform infrared spectroscopy and size-exclusion chromatography, pectins obtained with water, oxalate and cold dilute alkali were low methoxyl pectins while pectins obtained with hot dilute acid were high methoxyl pectins. In addition, the sugar compositional analysis revealed that the oxalate soluble pectin consisted mostly of galacturonic acid, indicating that it was a pectic acid.

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Comparison of curdlan and its carboxymethylated derivative by means of Rheology, DSC, and AFM

Cited by 155 publications

References 30 publications

Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair

Application of β-1,3-glucan in production of ceramics-based elastic composite for bone repair

Rheological properties of a β-1,3-polyglucuronic acid derivative from 4-acetamido-TEMPO-mediated oxidation of curdlan

Comparison of Pectins from the Alcohol-insoluble Residue of Japanese Pepper (Zanthoxylum piperitum DC.) Fruit, a Major By-product of Antioxidant Extraction

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