Pectins from gel and rind cell wall fibers of Aloe vera are extracted,isolated andidentified. Two classes of Aloe pectin are obtained: the high-molecular-weight(HMW)pectin and the low-molecular-weight (LMW) pectin. Aloe pectin have a lowmethoxyl(LM) content Aloe pectins form gel in the presence of calcium, and they,especially,the HMW pectin, form monovalent cation based gels at low temperature, whichrevertback to solution when brought to room temperature. The HMW Aloe pectin-calciumgelis used for controlled release. The monovalent cation-based gel is used as amatrix forstoring pharmacological substances and also for antigen and antibodyprecipitationreaction.
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