对可能影响膳食纤维持水能力的因素的研究。

An examination of factors which may affect the water holding capacity of dietary fibre.

Robertson J A, Eastwood M A

Br J Nutr. 1981 Jan;45(1):83-8. doi: 10.1079/bjn19810079.

Abstract

Dietary fibre has a water holding capacity (WHC) and this is a function of the fibre source and method of measurement. Water can be associated with fibre either as trapped water or bound water. This makes it difficult to predict the ability of fibre to influence stool weight in humans. 2. Examination of various fibre concentrates for chemical composition, as neutral detergent fibre (NDF), acid detergent fiber (ADF) and lignin; structure, by scanning electron microscopy; WHC, by centrifugation, suggests that WHC is more a function of fibre structure than chemical composition. Cereal fibre and vegetable fibre have a different chemical composition and are structurally very distinct. Structure is also dependent on the method of fibre preparation. 3. Measurement of WHC by centrifugation gives an estimate of the water which can be bound and also trapped by the fibre. The amount of trapped water will depend on the structure of the fibre whereas bound water will depend on the chemical composition.

摘要

膳食纤维具有持水能力（WHC），这是纤维来源和测量方法的函数。水与纤维的结合方式既可以是截留水，也可以是结合水。这使得难以预测纤维对人体粪便重量的影响能力。2. 对各种纤维浓缩物进行化学成分分析，如中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和木质素；通过扫描电子显微镜观察结构；通过离心法测量持水能力，结果表明持水能力更多地取决于纤维结构而非化学成分。谷物纤维和蔬菜纤维具有不同的化学成分，在结构上也非常不同。结构还取决于纤维的制备方法。3. 通过离心法测量持水能力可以估算出纤维能够结合和截留的水量。截留水量将取决于纤维的结构，而结合水则取决于化学成分。