Siddeeg Azhari, Zeng Xin-An, Ammar Al-Farga, Han Zhong
1School of Food Science and Engineering, South China University of Technology, Guangzhou, 510640 Guangdong China.
2Department of Food Engineering and Technology, Faculty of Engineering and Technology, University of Gezira, P.O. Box 20, Wad Medani, Sudan.
J Food Sci Technol. 2019 Feb;56(2):754-762. doi: 10.1007/s13197-018-3534-y. Epub 2018 Dec 10.
The target of this research was to determine sugar profile, volatile compounds, minerals content and antioxidant properties of the Sukkari date flesh as methanolic and ethanolic extracts. Sukkari date showed sugar 78.32% (dry weight), while fibre, crude protein, ash and crude fat were 3.15, 3.01, 2.30 and 0.56, respectively. Glucose (51.80%), fructose (47.50%), while small amount sucrose, fucose and galacturonic acid were also detected. Potassium, calcium and magnesium were observed to be the predominant. Twenty-two components were identified; 5-Hydroxymethylfurfural was present in the highest amount (27.25%), followed by 4H-Pyran-4-one,2,3-dihydro-3,5-dihydroxy-6-methyl (9.45%). Total phenolic and flavonoid content of methanolic extract were 62.50 mg GAE/100 g and 3.20 mg CE/100 g, respectively, against 60.25 mg GAE/100 g and 2.90 mg CE/100 g respectively, for ethanolic extracts. Three assays including DPPH, reducing power and ABTS radical scavenging activities showed a good antioxidant activity of date palm extract. Sukkari date was observed to have good nutritional and antioxidant characteristics and can be utilize as potential nutrition.
本研究的目标是测定作为甲醇提取物和乙醇提取物的苏卡里椰枣果肉的糖谱、挥发性化合物、矿物质含量和抗氧化特性。苏卡里椰枣的糖含量为78.32%（干重），而纤维、粗蛋白、灰分和粗脂肪分别为3.15%、3.01%、2.30%和0.56%。检测到葡萄糖（51.80%）、果糖（47.50%），同时还含有少量蔗糖、岩藻糖和半乳糖醛酸。观察到钾、钙和镁是主要的矿物质。鉴定出22种成分；5-羟甲基糠醛含量最高（27.25%），其次是4H-吡喃-4-酮，2,3-二氢-3,5-二羟基-6-甲基（9.45%）。甲醇提取物的总酚含量和总黄酮含量分别为62.50毫克没食子酸当量/100克和3.20毫克儿茶素当量/100克，乙醇提取物分别为60.25毫克没食子酸当量/100克和2.90毫克儿茶素当量/100克。包括DPPH、还原力和ABTS自由基清除活性在内的三种测定方法表明椰枣提取物具有良好的抗氧化活性。观察到苏卡里椰枣具有良好的营养和抗氧化特性，可作为潜在的营养物质加以利用。
