…When sucrose is present in an acidic solution (pH 2.5-3.5), it gels at low temperatures, which is used to make jams and jellies. Pectic substances, along with cellulose fibers, make up the cell walls of plants. The main component is a polymeric acidic polysaccharide (polygalacturonan) in which D-galacturonic acid is linked by α-1,4 bonds, and is composed of protopectin, pectinic acid, pectin, and pectic acid. … *Some of the terminology that mentions "pectic substance" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…酸性溶液中(pH2.5~3.5)でショ糖が存在すると,低温でゲル化することを利用してジャムやゼリーがつくられる。ペクチン質pectic substanceはセルロース繊維などとともに植物の細胞壁を構成する。主成分はD‐ガラクツロン酸がα‐1,4結合した高分子の酸性多糖(ポリガラクツロナン)であり,プロトペクチン,ペクチニン酸,ペクチン,ペクチン酸などから成る。… ※「pectic substance」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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