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Emulsifying Performance of Crude Surface-Active Extracts from Liquorice Root (Glycyrrhiza Glabra)
ACS Food Science & Technology Pub Date : 2021-09-03 , DOI: 10.1021/acsfoodscitech.1c00208 Noamane Taarji 1, 2, 3 , Meryem Bouhoute 1 , Youssef Chafai 4 , Abdellatif Hafidi 3 , Isao Kobayashi 5, 6 , Marcos A. Neves 1, 6 , Kenichi Tominaga 2 , Hiroko Isoda 1, 2, 6 , Mitsutoshi Nakajima 1, 2, 6
ACS Food Science & Technology Pub Date : 2021-09-03 , DOI: 10.1021/acsfoodscitech.1c00208 Noamane Taarji 1, 2, 3 , Meryem Bouhoute 1 , Youssef Chafai 4 , Abdellatif Hafidi 3 , Isao Kobayashi 5, 6 , Marcos A. Neves 1, 6 , Kenichi Tominaga 2 , Hiroko Isoda 1, 2, 6 , Mitsutoshi Nakajima 1, 2, 6
Affiliation
The emulsifying performance of crude aqueous–ethanolic extracts from liquorice root (Glycyrrhiza glabra) (LREs) was investigated. Seventy five percent aqueous ethanol extract produced the most stable oil-in-water emulsions, with average volume mean droplet diameters of approximately 130 nm and monomodal size distributions. The extract contained 6.87% proteins, 7.99% saponins, and 6.72% polyphenols and reduced the interfacial tension from 25.3 to 12.0 mN m–1 at the soybean oil/water and soybean oil/extract (1%, w/w) interfaces, respectively. The emulsifying performance of LREs was not correlated, however, with their interfacial activity or surface-active composition. The water extract provided limited stability upon storage at 25 °C for 48 h, despite its important surface-activity and composition. This extract presented the highest electrical conductivity and the lowest ζ-potentials, indicating that electric screening of charges was occurring when it was used as an emulsifier. Our findings indicate that crude surface-active extracts can be used directly as emulsifiers, without further purification, provided that an accurate balance between emulsion stabilizing and destabilizing agents is achieved by extraction.
中文翻译:
甘草根 (Glycyrrhiza Glabra) 表面活性粗提取物的乳化性能
研究了来自甘草根 ( Glycyrrhiza glabra ) (LREs)的粗水乙醇提取物的乳化性能。75% 的乙醇水溶液提取物产生了最稳定的水包油乳液,平均体积平均液滴直径约为 130 nm,具有单峰尺寸分布。提取物含有 6.87% 的蛋白质、7.99% 的皂苷和 6.72% 的多酚,并将界面张力从 25.3 降至 12.0 mN m –1分别在大豆油/水和大豆油/提取物 (1%, w/w) 界面处。然而,LRE 的乳化性能与其界面活性或表面活性成分无关。尽管水提取物具有重要的表面活性和组成,但在 25°C 下储存 48 小时后,其稳定性有限。该提取物具有最高的电导率和最低的 ζ 电位,表明当它用作乳化剂时发生了电荷的电屏蔽。我们的研究结果表明,只要通过提取实现乳液稳定剂和去稳定剂之间的准确平衡,粗表面活性提取物就可以直接用作乳化剂,无需进一步纯化。
更新日期:2021-09-17
中文翻译:
甘草根 (Glycyrrhiza Glabra) 表面活性粗提取物的乳化性能
研究了来自甘草根 ( Glycyrrhiza glabra ) (LREs)的粗水乙醇提取物的乳化性能。75% 的乙醇水溶液提取物产生了最稳定的水包油乳液,平均体积平均液滴直径约为 130 nm,具有单峰尺寸分布。提取物含有 6.87% 的蛋白质、7.99% 的皂苷和 6.72% 的多酚,并将界面张力从 25.3 降至 12.0 mN m –1分别在大豆油/水和大豆油/提取物 (1%, w/w) 界面处。然而,LRE 的乳化性能与其界面活性或表面活性成分无关。尽管水提取物具有重要的表面活性和组成,但在 25°C 下储存 48 小时后,其稳定性有限。该提取物具有最高的电导率和最低的 ζ 电位,表明当它用作乳化剂时发生了电荷的电屏蔽。我们的研究结果表明,只要通过提取实现乳液稳定剂和去稳定剂之间的准确平衡,粗表面活性提取物就可以直接用作乳化剂,无需进一步纯化。