Preparation and Physicochemical Properties of Fiber-Rich Fraction from Pineapple Peels as a Potential Ingredient

以鳳梨皮製備富含潛在性纖維成分及評估其理化性質

黃雅玲(Ya-Ling Huang) ； 周照仁(Chau-Jen Chow) ； 方永建(Yong-Jian Fang)

《藥物食品分析》 19卷3期 (2011/09) Pp. 318-323

摘要

鳳梨(Ananas comosus L. Merr.)皮爲農產廢棄物佔整個鳳梨重量的35%。本研究利用不同方法製備鳳梨皮纖維，以分析纖維的組成分，並評估其功能特性，將可提供日後生理功能的評估指標。鳳梨皮含有相當多量的不溶性纖維（佔41.8-48.0%），包括不溶性膳食纖維(insoluble dietary fiber, IDF)，不溶性酒精固形物(alcohol-insoluble solids, AIS)及不溶性水田形物(water-insoluble solids, WIS)。這些纖維主要由纖維素、果膠物質及半纖維素所構成，此外亦有多量的木質素（佔60.7-65.8%）。相較於纖維素，這些不溶性纖維部分顯示有較高的保水性(7.94-12.3mL/g)、保油性(5.84-8.64g/g)、膨脹力(10.6-18.4mL/g)及離子交換能力(102-120mequiv/kg)。由實驗結果顯示，各種纖維的理化特性會依據其製備方法及組成分而定，且本文所探討的每種不溶性纖維擁有有趣特性，顯示將可用於热量減低及膳食纖維強化的功能性食品成分之間發。

關鍵字

鳳梨皮 ； 膳食纖維 ； 富含纖維部分 ； 組成分 ； 理化特性

並列摘要

Pineapple (Ananas camosus L. Merr.) peels as agricultural wastes represent around 35% of the whole fruit mass. By different preparation methods, the pineapple peel fiber was analyzed and evaluated for its composition and functional properties, which would provide a clue to its physiological function. The pineapple peel contained an appreciable amount of insoluble fiber-rich fraction (FRF) (41.8-48.0 g/100 g) including insoluble dietary fiber (IDF), alcohol-insoluble solids (AIS), and water-insoluble solids (WIS), which primarily consisted of cellulose, pectic substances and hemicellulose. These fractions also contained notable proportions of lignin (60.7-65.8 g/100 g). Compared with cellulose, these FRFs exhibited the greater water-and oil-holding capacities (7.94-12.3 mL/g and 5.84-8.64 g/g, respectively), swelling properties (10.6-18.4 mL/g), and cation-exchange capacities (102-120 mequiv/kg). The results indicate that the physicochemical properties of various fibers are dependent on the preparation method and composition. Every insoluble FRF studied possesses interesting characteristics, suggesting possible uses in the development of functional food ingredients for reduction of calories or dietary fiber enrichment.

並列關鍵字

pineapple peel ； dietary fiber ； fiber-rich fractions ； composition ； physicochemical properties