Difficultés expérimentales de l'étude des macromolécules pectiques

Thibault, Jean-François; Saulnier, Lu; Axelos, Monique; Renard, Cathérine M.G.C.

doi:10.1080/01811789.1991.10827077

Cited by 4 publications

(2 citation statements)

References 43 publications

(16 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, it has been reported that extraction in a neutral medium leads to highly esterified pectin, whereas extracts isolated with chelating agents are low esterified pectin. The extraction in basic medium gives deesterified pectin because of the hydrolysis of the side chains of glycosidic bonds (Thibault et al, 1991).…”

Section: Identification Of or Extractsmentioning

confidence: 99%

Effect of extraction conditions on the antioxidant and antiglycation capacity of carbohydrates from Opuntia robusta cladodes

Chaouch

Hafsa

Rihouey

et al. 2016

Int J of Food Sci Tech

View full text Add to dashboard Cite

The extraction and characterisation of six crude polysaccharides from Opuntia robusta cladodes, as well as the assessment of their antioxidant and antiglycation activities in vitro, were examined. In this work, carbohydrates were extracted from defatted cladode's peels and pulps through a sequential extraction method in different aqueous medium (neutral, basic and chelating). The obtained polysaccharides were compared in terms of yield and physicochemical properties. Water-soluble extracts showed the highest yield, while peel's chelating-soluble extract gave high galacturonic acid content. Preliminary antioxidant in vitro tests suggested that peel's chelating-soluble extract presented the highest scavenging activity towards DPPH free radicals and inhibition of linoleic acid peroxidation. Furthermore, all extracted polysaccharides showed good potential in inhibiting the nonenzymatic glycation reaction, particularly on the first 3 days of incubation. The obtained results suggested that Opuntia robusta extracts could be explored as natural antioxidant, especially those extracted with chelating agent.

show abstract

Section: Identification Of or Extractsmentioning

confidence: 99%

Effect of extraction conditions on the antioxidant and antiglycation capacity of carbohydrates from Opuntia robusta cladodes

Chaouch

Hafsa

Rihouey

et al. 2016

Int J of Food Sci Tech

View full text Add to dashboard Cite

show abstract

“…This could be explained by the presence of covalent links between pectins and other parietal components, but also linkages between pectins exist (rhamnogalacturonans II). According to Thibault and Saulnier (1991), the extraction of pectins (which form an eggbox structure) could be improved by a chelating agent of metals like ammonium oxalate (Golovchenko et al, 2012). Xu et al (2007) have recorded losses in weight of about 24% of the initial mass, following the treatment of depectinisation with hot water of the leaves of some Poaceae.…”

Section: Yield Of Extraction Of Polysaccharidic Componentsmentioning

confidence: 99%

Investigation of parietal polysaccharides from Retama raetam roots

Brahimi¹,

Faugeron²,

Hachem³

et al. 2015

Afr. J. Biotechnol.

View full text Add to dashboard Cite

This study characterizes the cell wall hemicellulose and pectins polymers of Retama raetam. This species develops a particularly important root system and is adapted to arid areas. The cellulose, hemicelluloses and pectins were extracted. The cellulose remains the major component of the wall (27% for young roots and 80% for adult roots), hemicelluloses (14.3% for young roots and 3.6% for adult roots) and pectins (17.3% for young roots and 4.1% for adult roots). The monosaccharidic composition of water soluble extracts determined by gas liquid chromatography (GLC) and completed by infrared (FTIR) spectroscopy of hemicellulosic shows the presence of xylose as a major monosaccharide in the non-cellulose polysaccharides (47.8% for young roots and 59.5% for adult roots). These results indicate the presence of the homogalacturonans and rhamnogalacturonans in pectin. This study constitutes the preliminary data obtained in the biochemical analysis of the parietal compounds of the roots of a species which grows in an arid area in comparison with those of its aerial parts.

show abstract