Selective oxidation and determination of the substitution pattern of hydroxypropyl guar gum

Wu, Xin; Ye, Yingqing; Chen, Yannan; Ding, Bin; Cui, Junjie

doi:10.1016/j.carbpol.2010.01.044

Cited by 28 publications

(10 citation statements)

References 20 publications

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“…As shown in Fig. 6, new resonance peaks appear in the 9.2-9.5 ppm range, which can be ascribed to aldehyde protons (Kato et al, 2003;Wu et al, 2010;Leppanen et al, 2014), although in what appears to be a relatively low yield. The 13 C NMR spectra of enzymatically oxidized PGM display very small resonances between 176 and 177 ppm, characteristic of carboxylic groups (not shown), which suggests that the enzymatic oxidation reaction also generates few mannuronic and galacturonic acid residues.…”

Section: Nmr Characterization Of Native and Oxidized Pgmmentioning

confidence: 90%

“…Therefore, it can be concluded that the products originating from enzymatic oxidation are present as aldehydes, also hydrated, and/or forming hemiacetals with neighbors hydroxyl groups (Gomez et al, 2007;Wu et al, 2010).…”

Section: Nmr Characterization Of Native and Oxidized Pgmmentioning

confidence: 98%

“…However, due to the absence of NOE signal enhancement and long relaxation delay, the intensities of the carboxyl signals are barely detectable. No signal related to aldehyde products can be detected in the one dimensional 13 C NMR spectra, presumably due to formation of hydrate derivatives (Parikka and Tenkamen, 2009) and/or of hemiacetals with available hydroxyl groups (Wu et al, 2010).…”

Section: Nmr Characterization Of Native and Oxidized Pgmmentioning

confidence: 98%

See 2 more Smart Citations

Enzymatic and chemical oxidation of polygalactomannans from the seeds of a few species of leguminous plants and characterization of the oxidized products

Merlini

Boccia

Mendichi

et al. 2015

Journal of Biotechnology

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Section: Nmr Characterization Of Native and Oxidized Pgmmentioning

confidence: 90%

Section: Nmr Characterization Of Native and Oxidized Pgmmentioning

confidence: 98%

Section: Nmr Characterization Of Native and Oxidized Pgmmentioning

confidence: 98%

See 1 more Smart Citation

Enzymatic and chemical oxidation of polygalactomannans from the seeds of a few species of leguminous plants and characterization of the oxidized products

Merlini

Boccia

Mendichi

et al. 2015

Journal of Biotechnology

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“…It has better water solubility and film forming property than guar gum (Lu et al 2005;Xiao et al 2003) and plays a large role in the various products of chemically modified guar gum (Cheng et al 2002). HPG has been widely used in many industries such as oil recovery, food industry, paints and the formulation of cartridge explosives (Wu et al 2010;Xiao et al 2003). The large amount of -OH groups in HPG can interact with sodium carboxylate groups and hydroxyl groups on the surfaces of TOCNs.…”

Section: Introductionmentioning

confidence: 99%

Properties of hydroxypropyl guar/TEMPO-oxidized cellulose nanofibrils composite films

et al. 2015

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Flexible hydroxypropyl guar/TEMPO-oxidized cellulose nanofibrils (HPG/TOCNs) composite films were prepared using a conventional solventcasting technique. Their properties were investigated with a variety of techniques including tensile test, Fourier-transform infrared spectroscopy, scanning electron microscopy, oxygen permeability test, water vapor permeability test, thermogravimetric analysis and water contact angle measurement. The results indicate that HPG and TOCNs have an excellent miscibility and their blending mass ratio can significantly affect the physical, thermal, oxygen barrier and water vapor barrier properties of the composite films. Compared with pure HPG film, the composite films exhibit higher tensile strength and oxygen barrier properties. The water vapor resistance and thermal stability of the composite films are slightly lower than those of HPG film. However, the excellent flexibility, transparency and gas-barrier properties of the environmentally friendly HPG/TOCNs composite film make it a promising packaging material for food and pharmaceutical industries.

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“…This aldehyde functionality can be converted into acetyl or hemiacetal groups or as hydrates making them hydrophilic. 38 Thus the PDAGG can be used as a crosslinkable polymer for the stabilization of hybrid scaffolds such as HA-based hydrogels. Schiff's base reaction is used to immobilize different bioactive factors by an imine bond formation between the collagen amino acids (lysine, arginine) and the aldehyde groups present on monosaccharide units.…”

Section: Plant Exudatesmentioning

confidence: 99%

Glycans in scaffold design in tissue reconstruction

Jain

Singh

2021

Journal of Bioactive and Compatible Polymers

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Development of an artificial tissue by tissue engineering is witnessed to be one of the long lasting clarified solutions for the damaged tissue function restoration. To accomplish this, a scaffold is designed as a cell carrier in which the extracellular matrix (ECM) performs a prominent task of controlling the inoculated cell’s destiny. ECM composition, topography and mechanical properties lead to different types of interactions between cells and ECM components that trigger an assortment of cellular reactions via diverse sensing mechanisms and downstream signaling pathways. The polysaccharides in the form of proteoglycans and glycoproteins yield better outcomes when included in the designed matrices. Glycosaminoglycan (GAG) chains present on proteoglycans show a wide range of operations such as sequestering of critical effector morphogens which encourage proficient nutrient contribution toward the growing stem cells for their development and endurance. In this review we discuss how the glycosylation aspects are of considerable importance in everyday housekeeping functions of a cell especially when placed in a controlled environment under ideal growth conditions. Hydrogels made from these GAG chains have been used extensively as a resorbable material that mimics the natural ECM functions for an efficient control over cell attachment, permeability, viability, proliferation, and differentiation processes. Also the incorporation of non-mammalian polysaccharides can elicit specific receptor responses which authorize the creation of numerous vigorous frameworks while prolonging the low cost and immunogenicity of the substance.

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Selective oxidation and determination of the substitution pattern of hydroxypropyl guar gum

Cited by 28 publications

References 20 publications

Enzymatic and chemical oxidation of polygalactomannans from the seeds of a few species of leguminous plants and characterization of the oxidized products

Enzymatic and chemical oxidation of polygalactomannans from the seeds of a few species of leguminous plants and characterization of the oxidized products

Properties of hydroxypropyl guar/TEMPO-oxidized cellulose nanofibrils composite films

Glycans in scaffold design in tissue reconstruction

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