Glycerol, mannitol and sorbitol concentrations increased significantly in infected berries along with free galacturonic acid
, arabinose, galactose, rhamnose, mannose and xylose.
For the analysis of dietary fibre, pepsin was obtained from Merck (Darmstadt, Germany), pancreatin from Fluka (Sigma-Aldrich), and galacturonic acid
, chloroform, monohydrate and myo-inositol (internal standard) from Sigma Chemical Co.
The enzymatic activity was expressed in micromoles of galacturonic acid
produced per gram of fresh pulp mass per minute ([micro]mol galacturonic acid
One unit of enzyme is equal to the amount of enzyme which catalyzes the formation of 1 u M of galacturonic acid
The reducer groups were determined according to the technique described by Somogy and modified by Nelson (1944), using galacturonic acid
Fermentation from pectin produced only traces of galacturonic acid
, formic acid, lactic acid, acetic acid and ethanol.
Roughly 65% of the dry matter mass can be isolated as high value products being: microcellulose fibers (MCF) (33%), arabinose (16%) and galacturonic acid
The carbohydrate portion contains a variety of insoluble polysaccharides (containing rhamnose, arabinose, galactose, galacturonic acid
, glucose, xylose, and mannose) and soluble components, such as sucrose, raffinose, and stachyose (Eldrige et al.
oleracea containig two main fractions one of them rich in galacturonic acid
and the other one rich in arabinogalactan and in xylose (Garti et al.
Citrus peels are mainly made up of pectin (around 30% by mass), which is rich in galacturonic acid
2%) dominated in VW whereas for the soluble NSP fraction, galacturonic acid
citrus, apple), all of which share a common basic structure comprising a block co-polymer of 1,4-linked galacturonic acid
and 1-2-linked rhamnose with side branches of either 1,4-linked ?