Search Results

You are looking at 1 - 2 of 2 items for

  • Author or Editor: Areej Alsobh x
  • Refine by Access: All Content x
Clear All Modify Search

Abstract

This study aimed to assess the effectiveness of two reverse osmosis membranes (RO99 and X20) plus one nanofiltration membrane (NF270) at concentrating hawthorn fruit and anise seed extracts. Extracting the anise was done using water at a temperature of 37 °C over a period of 100 min. For hawthorn, ethanol-water (56%) was used as the solvent and extraction occurred at 55 °C for 80 min. The transmembrane pressure (TMP), temperature, and recirculation flow rate of the membrane separation process were monitored and set at 35 bar, 30 °C, and 400 l/h respectively. Using a spectrophotometer, the quantification of valuable compounds was examined. After studying the flow levels, it was discovered that the X20 membrane had the tiniest alterations in permeability, followed by RO99 and NF270. Moreover, in terms of efficiency, the X-20 outperformed RO-99 and NF-270 membranes, where TPC was increased (20 and 18-fold) for anise seed and hawthorn fruit extracts respectively, and TFC was increased 8-fold for both of the extracts. While using NF-270, TPC was increased only (11 and 6-fold), and TFC (4 and 2-fold) for anise seed and hawthorn fruit extracts respectively. For the antioxidant activity, the process using X-20 showed an improvement of around 12-fold for anise extracts and 15-fold for hawthorn extracts for antioxidant activity. In terms of brix, the anise extracts saw a 3-fold increase and the hawthorn extracts saw a 4-fold boost after going through the X-20 membrane concentration process. Additionally, the X-20 membrane exhibits the highest retention rates for both anise and hawthorn extracts and is least affected by fouling during the concentration process.

Open access

Abstract

In this work, an assessment of effective solvents and extraction methods was carried out to recover the bioactive compounds from hawthorn fruit (Crataegus monogyna Jacq.). Extractions assisted by heat, microwave, and ultrasound were carried out using various organic solvents (methanol, ethanol, and isopropanol). pH differential, Folin–Ciocalteu's, and aluminum chloride methods were used to determine total monomeric anthocyanin (TMA), total phenolic compound (TPC), and total flavonoid content (TFC), consecutively. Ferric Reducing Antioxidant Power (FRAP), 2,2-Diphenyl-1-picrylhydrazyl Hydrate (DPPH), and 2,2′- azino- bis (3-ethylbenzothiazoline-6- sulfonic acid) (ABTS) assays were used to measure the antioxidant activity (AA) of the extracts. The outputs revealed that extraction methods and solvents significantly affect anthocyanin concentration, TPC, TFC, AA, and color values of hawthorn fruit extracts. Due to the highest recovered TMA (0.152 ± 0.002 mg ECy3Gl/g of dry weight), TPC (49.14 ± 0.38 mg gallic acid equivalents/g of dry weight), and TFC (18.38 ± 0.19 mg quercetin equivalents/g of dry weight) contents, the ultrasonic-assisted extraction is superior to heat and microwave-assisted extractions. Accordingly, it was also observed that the methanol solvent is more profound than ethanol and isopropanol. Further, the bioactive compounds' content and the extracts' antioxidant activity are shown to be highly correlated. Thus, hawthorn extracts are considered to have antioxidant properties because of their concentrated bioactive compounds.

Open access