Carboxymethylation of kappa-carrageenan for intestinal-targeted delivery of bioactive macromolecules

Synthesis, physicochemical, structural and rheological characterizations of carboxymethyl xanthan derivatives

“…As previously reported for guar gum (Honghong et al, 2012), kappa-carrageenan (Leong et al, 2011), andkondagogu gum (Kumar and, etherification of xanthan gum takes place in two steps. Alkalization is the first step during which the hydroxyl groups of xanthan gum molecules are activated by transforming them into alkoxides (Eq.…”

“…Carboxymethylation of xanthan gum (XG) was similar to that reported by Leong et al (2011) and by Lefnaoui and Moulai-Mostefa (2015). Five grams of native XG powder was suspended in 100 mL of ethanol and stirred for 30 min at room temperature.…”

Carboxymethylation of polysaccharides from Auricularia auricula and their antioxidant activities in vitro

“…And the signals at 71.4 and 73.2 ppm were assigned to the methylene carbon atoms of the carboxymethyl substituents [6,21]. The shifts of C-6 from 60.7 to 70.5 ppm and the shifts of C-5 from 76.1 to 74.5 ppm, suggesting that the carboxymethyl substitution occurred at C-6 position [22,23]. Moreover, the shifts of C-2 from 75.5 to 73.8 ppm and C-4 from 66.1 to 75.9 ppm indicated that the residues in CMAAP22 are also substituted at the O-2 and O-4 positions by the substitution of -CH 2 COOH [7,24].…”

Carrageenan–Silica Hybrid Nanoparticles Prepared by a Non‐Emulsion Method

“…Owing to their biocompatibility and ability to form hydrogels, κ‐carrageenan has been extensively used as a gelling agent in food and pharmaceutical industries 23. Recent investigations have also demonstrated the potential of this polysaccharide for a number of distinct applications, namely, tissue engineering,24 drug‐release carriers,25–27 and sorbents for water remediation 28. Herein, κ‐carrageenan was firstly treated with the alkoxysilane 3‐isocyanatopropyltriethoxysilane (ICPTES) that contains isocyanate groups.…”