Global conformation analysis of irradiated xyloglucans

Patel, Trushar R.; Morris, Gordon A.; Ebringerová, Anna; Vodenicarova, M.; Velebný, Vladimír; Ortega, Álvaro; Torre, José Garcı́a de la; Harding, Stephen E.

doi:10.1016/j.carbpol.2008.05.006

Cited by 49 publications

(23 citation statements)

References 35 publications

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“…Indeed, the stiffness asymmetry in rod-coil diblock copolymers is known to increase the FloryHuggins interaction parameter x AB which quantifies the incompatibility between the blocks. This conformation asymmetry should facilitate the self-assembly at relatively C. Schatz, S. Lecommandoux [150] a) The average conformation of amylose in aqueous solution may be viewed as a coil with many sequences of short-range helical structures that are irregular and labile. [151] small degrees of polymerization in comparison to coil-coil block copolymers.…”

Section: Physicochemical Properties Of Polysaccharide Block Copolymersmentioning

confidence: 99%

Polysaccharide‐Containing Block Copolymers: Synthesis, Properties and Applications of an Emerging Family of Glycoconjugates

Schatz

Lecommandoux

2010

Macromol. Rapid Commun.

157

123

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While polysaccharide graft copolymers and glycopolymers have been widely studied and used in various applications, linear block copolymer structures combining a polysaccharide segment and a synthetic one have been less described. The limited availability of the polysaccharide reducing-end, the difficulty of finding a common solvent of both blocks and the need sometimes to protect the lateral hydroxyl groups of the polysaccharide chain may explain the relatively low number of studies on this copolymer family despite its potential interest. Polysaccharide block copolymers feature physicochemical properties not only close to those of synthetic block copolymers but also bring an added value such as the biodegradability, the biocompatibility or the bioactivity in some cases. This review aims at presenting the synthetic pathways towards such structures, from the basic polymerization techniques to the most recent ones including controlled/living polymerization mechanisms and also by emphasizing the chemical reactions used to functionalize the reducing-end of the polysaccharide block. The amphiphilic nature of most of the polysaccharide-based block copolymers reported so far gives rise to various self-assembly morphologies in the solid state or in selective solvents. In addition, the rigidity of the polysaccharide block is expected to influence the microphase separation of the block copolymer by increasing the thermodynamic incompatibility between dissimilar blocks. A special interest was drawn to the formation and the properties of polymer vesicles (polymersomes) in aqueous solutions. Polysaccharide block copolymers might represent a new class of biomaterials with potential applications in different fields such as the plastic industry, the detergency and also the pharmaceutics where the design of nanodevices carrying a native polysaccharide chain is of interest for therapy, vaccination and diagnosis purposes.

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Section: Physicochemical Properties Of Polysaccharide Block Copolymersmentioning

confidence: 99%

Polysaccharide‐Containing Block Copolymers: Synthesis, Properties and Applications of an Emerging Family of Glycoconjugates

Schatz

Lecommandoux

2010

Macromol. Rapid Commun.

157

123

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“…"glucose, galactose and xylose in the molar ratio of~3:2:1" (Freitas et al, 2005;Patel et al, 2008). An approximately 80% of glucose remains are replaced by xylose residues (1-6 linked), which themselves replaced in part by p-1-2 galactose residues ( Fig.…”

Section: Non-galactomannanmentioning

confidence: 98%

A review study on chemical composition and molecular structure of newly plant gum exudates and seed gums

Mirhosseini

Amid

2012

Food Research International

264

111

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“…19 Tamarind gum, a crude extract of tamarind seeds, is rich in polysaccharide ($65-72%), 20 which contains glucose, xylose, and galactose units, in a molecular ratio of $3:2:1, respectively. [21][22][23] Its structure is based on a b-(1 fi 4)-D-glucan backbone, substituted at position 6 of the glucopyranosyl units mainly by single a-D-xylopyranosyl residues as well as by disaccharide side chains composed of b-D-galactopyranosyl-(1 fi 2)-a-D-xylopyranosyl residues. 23 In addition, tamarind seed gum is a high molecular weight polysaccharide (720-880 kDa), 21,22,24,25 which forms viscous solutions when dissolved in water as many polysaccharide gums extracted from plant materials.…”

Section: Introductionmentioning

confidence: 99%

Urea fertilizer coated with biodegradable polymers and diatomite for slow release and water retention

Mukerabigwi

Wang

et al. 2015

J Coat Technol Res

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Slow release fertilizers (SRFs) are of vital importance to improve agricultural efficiency. However, their use is still limited due to their relatively high costs. Additionally, most of coating materials used to produce SRFs are nonbiodegradable and toxic to the soil. In this context, we utilized various biopolymers such as tamarind, xanthan, and guar gums together with diatomite to coat urea fertilizer granules. In this study, tamarind-urea-diatomite (TUD), guar-urea-diatomite (GUD), and xanthan-urea-diatomite (XUD) SRF granules were prepared in the presence of epichlorohydrin as crosslinker. The nutrients slow release behavior and the water retention capacity of these SRFs in soil were determined. The water absorbency of the product was 89% TUD, 93% GUD, and 142% XUD of its own weight when it was allowed to swell in tap water at room temperature for 2 h. Poly(methacrylic acid) was applied as the outermost layer of XUD to improve the nitrogen slow release efficiency of XUD SRFs. The results showed that the product had an excellent nutrients slow release property of 79.5% and good water retention capacity of 62.9% after 28 days. This suggested that XUDM could effectively improve the utilization of fertilizer. Furthermore, being biodegradable and low cost could be beneficial in agricultural and horticultural applications.

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Global conformation analysis of irradiated xyloglucans

Cited by 49 publications

References 35 publications

Polysaccharide‐Containing Block Copolymers: Synthesis, Properties and Applications of an Emerging Family of Glycoconjugates

Polysaccharide‐Containing Block Copolymers: Synthesis, Properties and Applications of an Emerging Family of Glycoconjugates

A review study on chemical composition and molecular structure of newly plant gum exudates and seed gums

Urea fertilizer coated with biodegradable polymers and diatomite for slow release and water retention

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