Laboratorio Integral de Investigación en Alimentos, División de Estudios de Posgrado, Instituto Tecnológico de Tepic, Av. Tecnológico 2595, CP 63175, Tepic, Nayarit, Mexico.
J Sci Food Agric. 2014 Mar 30;94(5):898-904. doi: 10.1002/jsfa.6333. Epub 2013 Aug 27.
Dietary fiber (DF) and antioxidant compounds are widely used as functional ingredients. The market in this field is competitive and the search for new types of quality ingredients for the food industry is intensifying. The aim of this study was to evaluate the composition and antioxidant activity of by-products generated during the decoction of calyces of four Mexican Hibiscus sabdariffa L. cultivars ('Criolla', 'China', 'Rosalis' and 'Tecoanapa') in order to assess them as a source of functional ingredients.
Some calyx components were partially transferred to the beverage during the decoction process, while most were retained in the decoction residues. These by-products proved to be a good source of DF (407.4-457.0 g kg⁻¹ dry matter) and natural antioxidants (50.7-121.8 µmol Trolox equivalent g⁻¹ dry matter).
The decoction process extracted some soluble carbohydrates, ash and some extractable polyphenols. The DF content changed in the dried residues, which could be considered as high-DF materials with a high proportion of soluble DF (∼20% of total DF) and considerable antioxidant capacity. These by-products could be used as an antioxidant DF source.
膳食纤维（DF）和抗氧化化合物被广泛用作功能性成分。该领域的市场竞争激烈，人们对食品工业新型优质成分的需求也在不断增加。本研究旨在评估在煮泡四个墨西哥芙蓉（Hibiscus sabdariffa L.）品种（'Criolla'、'China'、'Rosalis'和'Tecoanapa'）花萼过程中产生的副产物的组成和抗氧化活性，以评估其作为功能性成分的来源。
部分花萼成分在煮泡过程中转移到饮料中，而大部分则保留在煮泡残渣中。这些副产物被证明是 DF（407.4-457.0 g kg⁻¹ 干物质）和天然抗氧化剂（50.7-121.8 µmol Trolox 当量 g⁻¹ 干物质）的良好来源。
煮泡过程提取了一些可溶性碳水化合物、灰分和一些可提取的多酚。DF 含量在干燥残渣中发生变化，这些残渣可被视为高 DF 材料，其中可溶性 DF 含量较高（约总 DF 的 20%），且具有相当大的抗氧化能力。这些副产物可用作抗氧化 DF 来源。
