Rheological Behavior of Glycyrrhiza glabra (Licorice) Extract as a Function of Concentration and Temperature: A Critical Reappraisal

Abstract

In the present study, rheological properties of twelve different licorice root extracts were evaluated using a rotational viscometer as a function of soluble solids content (15–45 °Bx) and temperature (30–70 °C). Response Surface Methodology was used to understand the relationships between the parameters. The experimental data were then fit into mathematical models. The results, for the first time, revealed that the licorice solutions had non-Newtonian shear-thinning behaviors with flow behavior indexes of 0.24 to 0.91, depending on the licorice extract samples, temperature, and °Bx. These observations were different from those reported in the literature and the present study elaborated on reasons for such observations. Further, the shear-thinning behavior generally increased by increasing the °Bx and decreasing the temperature. In addition, the power-law model was found to be suitable for predicting the experimental data. The newly revealed information can be particularly important in designing the unit operations for licorice extract processing.

Effects of ultrasonic power on drying kinetics and product quality of licorice extract during ultrasound‐assisted vacuum drying

“…Licorice extract is usually obtained by boiling ground licorice root with water. The extract is then further concentrated and dried into powders to achieve better storage performance and transportation economy 4 . Spray drying and vacuum drying are common methods of extract drying.…”

“…The extract is then further concentrated and dried into powders to achieve better storage performance and transportation economy. 4 Spray drying and vacuum drying are common methods of extract drying. The extract powder prepared by spray drying has such attributes as viscosity and hygroscopicity due to the presence of substances with a low glass transition temperature.…”

Revisiting liquorice (Glycyrrhiza glabra L.) as anti-inflammatory, antivirals and immunomodulators: Potential pharmacological applications with mechanistic insight.

“…This plant has been documented and reviewed as traditional remedy for the prevention of painful swellings, cough, colds, and influenza. ( Pastorino et al, 2018 ; Hosseini et al, 2020 ; Nasiri et al, 2020 ). G. glabra and its bioactive phytochemicals holds multiple pharmacological activities like, antidemulcent, expectorant, antiulcer, anti-inflammatory, anticancer and antidiabetic as an evidence from various review held in recent past ( Pandey et al, 2017 ; Sharma et al, 2018 ).…”

Physicochemical Properties and Structure Changes of Food Products during Processing

“…Finally, the rheological properties of twelve different licorice root extracts were evaluated using a rotational viscometer as a function of soluble solids content (15–45 °Bx) and temperature (30–70 °C) by Nasiri et al [ 14 ].…”