title: CHANGES OF PECTIN SUBSTANCES CONTENT DURING THE PEAR FRUITS STORAGE WITH ANTIOXIDANT COMPOSITIONS TREATMENT
abstract: Aim.The researches are devoted to regularities determination of pectin substances changes of pear fruits during refrigeration storage with antioxidant compositions treatment. Methods. The content of pectin substances was determined by titerometric method, which is based on titration with alkaline the pre-selected and prepared pectin substances before and after hydrolysis. The titration results are proportional to the number of free esterified carboxylic groups and when multiplied by the correspo
journal: Journal of Chemistry and Technologies