比较甘蔗、榆皮和小麦糊精制备的膳食纤维的化学成分。

Comparing the chemical composition of dietary fibres prepared from sugarcane, psyllium husk and wheat dextrin.

机构信息

Department of Molecular Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, 2109, New South Wales, Australia; Australian Research Council Industrial Transformation Training Centre for Molecular Technology in the Food Industry, Australia.

Gratuk Technologies Pty. Ltd., Lane Cove North, 2066, New South Wales, Australia.

出版信息

Food Chem. 2019 Nov 15;298:125032. doi: 10.1016/j.foodchem.2019.125032. Epub 2019 Jun 17.

DOI:10.1016/j.foodchem.2019.125032

PMID:31260968

Abstract

A dietary fibre prepared from sugarcane stalk was compared with psyllium husk and wheat dextrin. In contrast to the other dietary fibres, sugarcane fibre was found to contain significant amounts of insoluble dietary fibre (73-86%), lignin (18.66-20.23%), and rare minerals such as chromium (0.67-2.54 mg/100 g) and manganese (1.07-2.34 mg/100 g). Analysis of the ethanol extract also detected compounds with antioxidant activity. Characterisation of five sugarcane fibres prepared from selected strains, harvest periods (growth or storage phase), and processing conditions showed these factors influenced the final composition. Furthermore, using in vitro digestion, we found that potassium, magnesium, chromium, and zinc in were bioaccessible in sugarcane samples. Also, sodium was shown to bind to the sugarcane fibre potentially indicating bile salt binding activity. Results from this study support the use of sugarcane as a source of dietary fibre in functional foods.

摘要

一种从甘蔗茎中提取的膳食纤维与车前草壳和小麦糊精进行了比较。与其他膳食纤维不同，甘蔗纤维被发现含有大量的不溶性膳食纤维（73-86%）、木质素（18.66-20.23%）和稀有矿物质，如铬（0.67-2.54mg/100g）和锰（1.07-2.34mg/100g）。对乙醇提取物的分析还检测到具有抗氧化活性的化合物。对从选定品种、收获期（生长或储存期）和加工条件制备的五种甘蔗纤维的特性分析表明，这些因素会影响最终的组成。此外，通过体外消化，我们发现钾、镁、铬和锌在甘蔗样品中是可生物利用的。此外，钠被证明与甘蔗纤维结合，可能表明胆汁盐结合活性。这项研究的结果支持将甘蔗作为功能性食品中膳食纤维的来源。