PDF(Pubmed)
Abstract：
The maple syrup industry generates substandard syrups and sugar sand as by-products, which are underused. In this study, we conducted a comprehensive analysis of the physicochemical composition of these products to assess their potential for valorization. Using HPLC analysis, we measured sugar and organic acid content as well as total polyphenol content using the Folin-Ciocalteu method. Additionally, we evaluated the in vitro digestibility using the TIM-1 model. We showed that the composition of ropy and buddy downgraded syrups is comparable to that of standard maple syrup, whereas sugar sand\'s composition is highly variable, with carbohydrate content ranging from 5.01 mg/g to 652.89 mg/g and polyphenol content ranging from 11.30 µg/g to 120.95 µg/g. In vitro bioaccessibility reached 70% of total sugars for all by-products. Organic acid bioaccessibility from sugar sand and syrup reached 76% and 109% relative to standard maple syrup, respectively. Polyphenol bioaccessibility exceeded 100% during digestion. This can be attributed to favorable extraction conditions, the breakdown of complex polyphenol forms and the food matrix. In conclusion, our study demonstrates that sugar sand and downgraded maple syrups exhibit digestibility comparable to that of standard maple syrup. Consequently, they hold potential as a source of polyphenols, sugar or organic acids for applications such as industrial fermentation or livestock feeds.
摘要：
枫糖浆行业产生不合格的糖浆和糖沙作为副产品，这些都没有得到充分利用。在这项研究中,我们对这些产品的理化成分进行了全面分析，以评估其增值潜力。使用HPLC分析，我们使用Folin-Ciocalteu方法测量了糖和有机酸含量以及总多酚含量。此外,我们使用TIM-1模型评估了体外消化率。我们发现，Tropy和buddy降级糖浆的成分与标准枫糖浆相当，而糖砂的成分是高度可变的，碳水化合物含量为5.01mg/g至652.89mg/g，多酚含量为11.30µg/g至120.95µg/g。体外生物可利用性达到所有副产品总糖的70%。相对于标准枫糖浆，糖沙和糖浆的有机酸生物可获得性分别达到76％和109％，分别。消化过程中多酚生物可及性超过100%。这可以归因于有利的提取条件，复杂多酚形式和食品基质的分解。总之,我们的研究表明，糖沙和降级的枫糖浆表现出与标准枫糖浆相当的消化率。因此,它们具有作为多酚来源的潜力，用于工业发酵或牲畜饲料等应用的糖或有机酸。
