retrogradation


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retrogradation

[¦re·trō·grā′dā·shən]
(chemistry)
Generally, a process of deterioration; a reversal or retrogression to a simpler physical form.
A chemical reaction involving vegetable adhesives, which revert to a simpler molecular structure.
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References in periodicals archive ?
Composition, physicochemical properties and retrogradation characteristics of native, oxidized, acetylated and acid-thinned new cocoyam (Xanthosoma sagittifolium) starch.
Effect of amylose content on gelatinization, retrogradation, and pasting properties of starch from waxy and non-waxy wheat and their F1 seeds.
Though the retrogradations and recessions of the stars may simply be models, they at least are consistent in themselves and useful for accounting for the motions of the celestial bodies.
Effects of moisture content and different gelatinization heating temperatures on retrogradation of waxy-type maize starches.
Some emulsifiers also have the beneficial effect of slowing down starch retrogradation, which reduces the crumb's firming process during the natural staling of bread.
The present increased mangrove disturbance in Costa Rica and its consequent retrogradation is sometimes related to sea level changes; in some areas degradation may be linked to the expansion of cultivated plants, fruit-trees, some palms, Melina, coffee, cocoa, grasses and vegetable and herbaceous weeds.
The 1979 statute led to the retrogradation of the role of student unions and was a principal tool used to fragment politically-seasoned movements and leaders," AFTE says.
Il suffit de mentionner la Charte de la langue francaise (71), qui autorise l'arbitre de griefs a annuler le congediement, la retrogradation ou le deplacement d'un salarie au motif que ce dernier ne parle pas le francais, la Loi sur la fete nationale (72), qui fait de l'arbitre de griefs le gardien du conge ferie du 24 juin (73), et la Loi sur les accidents du travail et les maladies professionnelles (74), qui donne a l'arbitre la competence pour disposer de la plainte d'un travailleur qui allegue avoir ete l'objet d'une sanction en raison de l'exercice d'un droit que lui confere cette loi (75).
Ring, The role of amylose and amylopectin in the gelation and retrogradation of starch, Carbohydrate Research 135 (1985) pp.
Factors contributing to decreased digestibility include: 1) increased dietary fiber intake; 2) intact cell walls which hinder penetration of the digestive enzymes to access the starch and protein; 3) residual lectin activity; 4) limited proteolysis of certain proteins; 5) incomplete hydration of the starch granule; and 6) amylose retrogradation.