Carboxymethylation of Cassia angustifolia seed gum: Synthesis and rheological study

Rajput, Gaurav Kumar; Pandey, Indu; Joshi, Gyanesh

doi:10.1016/j.carbpol.2014.09.063

Cited by 41 publications

(13 citation statements)

References 25 publications

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“…DS of carboxymethylated Cassia angustifolia seed gum increased from 0.033 to 0.474 as reaction temperature increased from 30 to 75°C. Further increases in reaction temperature causes polysaccharide polymer degradation (Rajput et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Carboxymethyl derivatives of flaxseed (Linum usitatissimum L.) gum: characterisation and solution rheology

Liu

Shen

Shim

et al. 2015

Int J of Food Sci Tech

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Summary Carboxymethyl ether moieties were introduced to flaxseed (Linum usitatissimum L.) gum (FG) by reacting gum with monochloroacetic acid (MCA). Effects of ether forming reaction conditions, temperature, NaOH concentration and molar ratio of FG (anhydroxylose equivalent) to MCA, on the degree of substitution (DS) were investigated. Treatment at 70 °C, with 7.0 m NaOH, and molar ratio of MCA to FG of 10:1 over 3 h produced a polysaccharide with a DS of 0.824 ± 0.012. Both surface morphology and thermal behaviour were modified. Solutions of FG (0.5–4.0%, w/v) exhibited shear‐thinning behaviour where viscosity decreased with decreased FG concentration. After carboxymethylation, modified polymer solutions also exhibited shear‐thinning behaviour, where dynamic viscosity was lower than that of native FG solutions at the same concentration. The dynamic viscosities were lower for solutions of modified FG with higher DS and also lower for solutions made at lower FG concentrations (0.5–4.0%, w/v). A more liquid‐like behaviour with increasing FG DS was indicated as storage modulus G′ and loss modulus G″ decreased and became more frequency dependent. The substitution of hydroxyl groups with carboxymethyl groups suppressed entanglement between FG polysaccharide chains by reducing intermolecular association.

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Section: Resultsmentioning

confidence: 99%

Carboxymethyl derivatives of flaxseed (Linum usitatissimum L.) gum: characterisation and solution rheology

Liu

Shen

Shim

et al. 2015

Int J of Food Sci Tech

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“…[13,[25][26][27][28][29][30][31][32][33][34][35][36][37][38] In addition, the carboxymethylationo fs tarch has been studied in different reaction media. [46][47][48] In addition to aw ide range of studies on the carboxymethylation of biomass, others tudies have been performed to analyze other carboxyalkylation reactions. [41][42][43][44][45] Moreover,c arboxymethylationw as used on Cassia angustifolia seed gum and chitosant oi mprove their rheological properties for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

“…[41][42][43][44][45] Moreover,c arboxymethylationw as used on Cassia angustifolia seed gum and chitosant oi mprove their rheological properties for biomedical applications. [46][47][48] In addition to aw ide range of studies on the carboxymethylation of biomass, others tudies have been performed to analyze other carboxyalkylation reactions. Carboxyalkylation is aw ell-known derivatization process that induces products with primary and/or secondary alcoholgroupsifaliphatic or aromaticu nits of polymers are etherified by ad irect alkylation methodw ith monohalocarboxylic acids.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Carboxyethylated Lignosulfonate

Bahrpaima

Fatehi

2018

ChemSusChem

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Lignosulfonate is a byproduct of the sulfite pulping process and has limited use in industry. The main objective of this study was to investigate the carboxyethylation of lignosulfonate to increase its charge density to broaden its applications. The carboxyethylation of lignosulfonate was optimized under the conditions of 30 wt % NaOH, 2.0 mol mol 2-chloropropinic acid/lignosulfonate, 90 °C, 0.5 h, and 0.03 mol 2-chloropropinic acid, which produced carboxyethylated lignosulfonate with a charge density and molecular weight of -3.51 meq g and 46 493 g mol , respectively. The mechanism of the carboxyethylation reaction using 2-chloropropinic acid by an S 1 pathway in an alkaline solution was discussed. Methylation was also used to mask the phenolic hydroxide groups of lignosulfonate to investigate if carboxyethylation occurred on aliphatic hydroxide groups of lignosulfonate. The produced carboxyethylated lignosulfonate was characterized by using FTIR spectroscopy, NMR spectroscopy, gel permeation chromatography, and elemental and functional group analyses. Basic H- H 2 D COSY NMR spectroscopy was used to record the coupled spins of the carboxyethyl group on carboxyethylated lignosulfonate. The information from 1 D H NMR and 2 D NMR COSY spectroscopy provided evidence for the existence of a 1-carboxyethyl group on the carboxyethylated lignosulfonate structure.

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“…Some of researchers determined that as a laxative agent abuse of Cassia anugustifolia may cause hepatotoxicity so careful use is more necessary for Cassia angustifolia [11]. Cassia angustifolia seeds gum have the potential to convert into a new source of commercial gum thus utilized as an additive in pharmaceutical formulations [12]. Phytochemical qualitative and quantitative analysis of cassia angustifolia have been reported in the table 1 and 2.…”

Section: Cassia Angustifoliamentioning

confidence: 99%

Phytochemical and Antioxidant Screening of Cassia Angustifolia,curcuma Zedoaria, Embelia Ribes, Piper Nigrum, Rosa Damascena,terminalia Belerica, Terminalia Chebula, Zingiber Officinale and Their Effect on Stomach and Liver

Zeeshan¹,

Barkat²,

Mahmood³

2018

Matrix sci. medica

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Herbal medicinal natural plants and species are mostly used for wide purposes in Pakistan in current situation. There are diverse variety of phytochemical constituents which are present in plants and act as secondary metabolites that are formed from the normal metabolism likewise alkaloids, flavonoids, glycoside, phenols, steroids and other specific pigments. Therefore, the botanist concentrations are increasingly changing to ethnobotanical practices due to availability at lower price, wide safety and efficacy margin and less side effects of plants. The medicinal benefits of the special phytochemical of the plants cannot be ignored. Some of the herbal plants have been expressed for their significance to take care of the different ailments of mankind particularly correlated to liver, GIT, stomach and colon.

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Carboxymethylation of Cassia angustifolia seed gum: Synthesis and rheological study

Cited by 41 publications

References 25 publications

Carboxymethyl derivatives of flaxseed (Linum usitatissimum L.) gum: characterisation and solution rheology

Carboxymethyl derivatives of flaxseed (Linum usitatissimum L.) gum: characterisation and solution rheology

Synthesis and Characterization of Carboxyethylated Lignosulfonate

Phytochemical and Antioxidant Screening of Cassia Angustifolia,curcuma Zedoaria, Embelia Ribes, Piper Nigrum, Rosa Damascena,terminalia Belerica, Terminalia Chebula, Zingiber Officinale and Their Effect on Stomach and Liver

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