ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Postharvest storage of white asparagus (Asparagus officinalis L.): changes in dietary fiber (nonstarch polysaccharides).

Villanueva-Suarez, M. J.; Redondo-Cuenca, A.; Rodriguez-Sevilla, M. D.; Heredia-Moreno, A.;

Journal of Agricultural and Food Chemistry Year: 1999 Vol: 47 Issue: 9 Pages: 3832-3836 Ref: 14 ref.

1999

บทคัดย่อ

Changes occurring in the content and composition of the dietary fibre of white asparagus were studied under the following storage conditions: 2 deg C; 2 deg C in polyethylene bags with air; and 2 deg C in polyethylene bags with a selected gas mixture (15% O2, 10% CO2 and 75% N2). The neutral sugars and uronic acid composition of dietary fibre was determined by gas chromatography and by a spectrophotometric method. The modifications observed in the dietary fibre of the non-packed asparagus stored in air at 2 deg C were more rapid and pronounced than those in polyethylene bags in either air or a modified atmosphere. The most important changes corresponded to increases in xylose and glucose from insoluble dietary fibre (from 2.62 to 5.14 and 7.50 to 10.14 g/100 g dry matter at 21 days of storage, respectively) and decreases in galactose (from 1.43 to 0.93 g/100 g) from soluble dietary fibre. Losses of glucose, uronic acids, arabinose and galactose were greater in packed spears stored in a modified

atmosphere than in packed spears stored in air. Statistical analysis indicated that the modifications were significantly affected by the type of storage and time.